Munich, Germany
Munich, Germany

Siemens AG is a German multinational conglomerate company headquartered in Berlin and Munich. It is the largest engineering company in Europe. The principal divisions of the company are Industry, Energy, Healthcare, and Infrastructure & Cities, which represent the main activities of the company. The company is a prominent maker of medical diagnostics equipment and its medical health-care division, which generates about 12 percent of the company's total sales, is its second-most profitable unit, after the industrial automation division.Siemens and its subsidiaries employ approximately 343,000 people worldwide and reported global revenue of around €71.9 billion in 2014 according to their annual report. Wikipedia.

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Patent
Siemens AG | Date: 2017-06-21

A marine vessel electric power supply charging control system comprises one or more energy storage control units (15a, 15b, 15c, 15d), one or more energy storage devices (8a, 8b, 8c, 8d) coupled to the one or more energy storage control units; and at least one consumer (9, 10, 11, 12) on board the vessel. The charging control system further comprises a DC input (6) to receive a DC input voltage on a DC bus (7) from a shore DC supply; wherein the energy storage control unit comprises an input (32) to receive a DC input voltage from the DC bus (7), a voltage detector (26) to determine a DC voltage at an input to the energy storage device; a converter (24) to convert the DC input voltage to a required output voltage according to the DC voltage detected at the input to the energy storage device; and, an output (25) to output the required DC output voltage to an energy storage device (8a, 8b, 8c, 8d).

Claims which contain your search:

1. A marine vessel electric power supply charging control system comprising one or more energy storage control units; one or more energy storage devices coupled to the one or more energy storage control units; and at least one consumer on board the vessel; wherein the charging control system further comprises a DC input to receive a DC input voltage on a DC bus from a shore DC supply; wherein the energy storage control unit comprises an input to receive a DC input voltage from the DC bus, a voltage detector to determine a DC voltage at an input to the energy storage device; a converter to convert the DC input voltage to a required output voltage according to the DC voltage detected at the input to the energy storage device; and, an output to output the required DC output voltage to an energy storage device.

2. A system according to claim 1, wherein each energy storage device is coupled to its own energy storage control unit.

3. A system according to claim 1 or claim 2, wherein the system further comprises a vessel energy management system on board the vessel coupled to the voltage detector.

4. A system according to claim 3, wherein the vessel energy management system is coupled to generators on board the vessel.

7. A system according to claim 5 or claim 6, wherein the shore unit further comprises an auxiliary battery to boost the voltage supplied to the DC bus.

8. A system according to any preceding claim, wherein the one or more energy storage control unit are mounted on board the vessel.

9. A method of controlling charging of a marine vessel electric power supply, the method comprising connecting a shore unit to the vessel, the shore unit comprising an AC supply, a transformer and a rectifier; converting the AC supply to DC in the shore unit; and supplying DC to the vessel; in an energy storage control unit detecting a DC voltage at an input to an energy storage device installed on the vessel; determining a DC voltage of an input from a DC bus; comparing the detected DC voltage with the voltage on the DC bus; converting the voltage from the DC bus to match the detected voltage; and supplying the converted voltage to the energy storage device.


Patent
Siemens AG | Date: 2017-02-22

A method for predicting a performance of an electrical energy storage system includes receiving, as input, time series of data points pertaining to a plurality of operational parameters of the electrical energy storage system. The input time series is provided to a model that simulates dynamics of the electrical energy storage system. A plurality of performance indicators of the electrical energy storage system may be calculated based on the simulated dynamics of the electrical energy storage system.

Claims which contain your search:

1. A method for predicting a performance of an electrical energy storage system, the method comprising: receiving, as input, time series of data points pertaining to a plurality of operational parameters of the electrical energy storage system, providing the input time series to a model that simulates dynamics of the electrical energy storage system, and calculating a plurality of performance indicators of the electrical energy storage system based on the simulated dynamics of the electrical energy storage system.

3. The method according to any of the preceding claims, wherein the input time series is obtained from measurement of operational parameters during actual operation of the electrical energy storage system.

4. The method according to any of claims 1 and 2, wherein the input time series is obtained from an archive of measured values of operational parameters of the electrical energy storage system.

5. The method according to any of the preceding claims, wherein the plurality of performance indicators comprise energy capacity of the electrical energy storage system, and/or losses in use of the electrical energy storage system, and/or efficiency of the electrical energy storage system, and/or maximum power of the electrical energy storage system.

8. The method according to any of the preceding claims, wherein the model dynamically simulates one or more states of the electrical energy storage system, wherein the performance indicators are determined from the simulated one or more states of the electrical energy storage system.

9 The method according to claim 8, wherein the one or more simulated states comprise state of charge, or state of health, or internal temperature, or voltage, or energy capacity, or depth of discharge, or internal resistance, or combinations thereof.

12. The method according to any of the preceding claims, wherein the electrical energy storage system comprises one or more batteries.

13. A method for tracking a performance of an electrical energy storage system, comprising: receiving, as input, time series of data points pertaining to a plurality of operational parameters of the electrical energy storage system, providing the input time series to a model that simulates dynamics of the electrical energy storage system, calculating predicted values of a plurality of performance indicators of the electrical energy storage system based on the simulated dynamics of the electrical energy storage system, measuring actual values of said plurality of performance indicators from usage of the electrical energy storage system, and comparing the predicted values with the measured values of the respective performance indicators to determine any discrepancy in performance of the electrical energy storage system with respect to that predicted by the simulation model.

16. The method according to any of claims 14 or 15, further comprising controlling operation of the electrical energy storage system by calculating operating parameters so as to minimize the deviation and/or cost associated with one or more performance indicators.

17. A method for servicing a consumer of an electrical energy storage system, comprising: providing a performance guarantee on the electrical energy storage system, wherein the performance guarantee is based on performance indicators predicted by a simulation model of the electrical energy storage system, wherein the simulation model is configured for: receiving, as input, time series of data points pertaining to a plurality of operational parameters of the electrical energy storage system, using the input time series to simulate dynamics of the electrical energy storage system, and calculating predicted values of a plurality of performance indicators of the electrical energy storage system based on the simulated dynamics of the electrical energy storage system.

18. The method according to claim 17, further comprising assessing whether the electrical energy storage system meets a guaranteed performance based on a comparison between a predicted value and a measured value of a performance indicator of the electrical energy storage system, wherein the predicted value of the performance indicator is dynamically obtained from the simulation model of the electrical energy storage system. wherein the measured value of the performance indicator is obtained from actual usage of the electrical energy storage system.


Grant
Agency: European Commission | Branch: H2020 | Program: IA | Phase: LCE-08-2014 | Award Amount: 15.40M | Year: 2015

The project SENSIBLE addresses the call LCE-08-2014 by integrating electro-chemical, electro-mechanical and thermal storage technologies as well micro-generation (CHP, heat pumps) and renewable energy sources (PV) into power and energy networks as well as homes and buildings. The benefits of storage integration will be demonstrated with three demonstrators in Portugal, UK and Germany. vora (Portugal) will demonstrate storage-enabled power flow, power quality control and grid resilience/robustness in (predominantly low-voltage) power distribution networks under the assumption that these networks are weak and potentially unreliable. Nottingham (UK) will focus on storage-enabled energy management and energy market participation of buildings (homes) and communities under the assumption that the grid is strong (so, with no or little restrictions from the grid). Nuremberg (Germany) will focus on multi-modal energy storage in larger buildings, considering thermal storage, CHP, and different energy vectors (electricity, gas). An important aspect of the project is about how to connect the local storage capacity with the energy markets in a way that results in sustainable business models for small scale storage deployment, especially in buildings and communities. SENSIBLE will also conduct life cycle analyses and assess the socio-economic impact of small-scale storage integrated in buildings distribution networks. By integrating different storage technologies into local energy grids as well as homes and buildings, and by connecting these storage facilities to the energy markets, the project SENSIBLE will have a significant impact on local energy flows in energy grids as well as on the energy utilization in buildings and communities. The impacts range from increased self-sufficiency, power quality and network stability all the way to sustainable business models for local energy generation and storage.


Grant
Agency: European Commission | Branch: H2020 | Program: IA | Phase: LCE-02-2016 | Award Amount: 15.84M | Year: 2017

inteGRIDy aims to integrate cutting-edge technologies, solutions and mechanisms in a scalable Cross-Functional Platform connecting energy networks with diverse stakeholders, facilitating optimal and dynamic operation of the Distribution Grid (DG), fostering the stability and coordination of distributed energy resources and enabling collaborative storage schemes within an increasing share of renewables. inteGRIDy will: a) Integrate innovative smart grid technologies, enabling optimal and dynamic operation of the distribution systems assets within high grid reliability and stability standards b) Validate innovative Demand Response technologies and relevant business models c) Utilize storage technologies and their capabilities to relieve the DG and enable significant avoidance of RES curtailment, enhancing self-consumption and net metering d) Enable interconnection with transport and heat networks, forming Virtual Energy Network synergies ensuring energy security e) Provide modelling & profiling extraction for network topology representation, innovative DR mechanisms and Storage characterization, facilitating decision making in DGs operations f) Provide predictive, forecasting tools & scenario-based simulation, facilitating an innovative Operation Analysis Framework g) Develop new business and services to create value for distribution domain stakeholders and end users/prosumers in an emerging electricity market. inteGRIDy will impact on: a) operations by reconfigurable topology control & supervision b) market by providing new services c) customer by enhanced engagement through DR mechanisms d) transmission by novel forecasting scenarios for the MV/LV areas e) part of the production incorporating innovative storage targeting the optimum use of RES f) environment by CO2 reduction inteGRIDy approach will be deployed and validated in 6 large-scale and 4 small-scale real-life demonstration covering different climatic zones and markets with different maturity.


Power plant with a constant electrical power output, method for providing a constant electrical power output by using the power plant and method for designing a battery for the power plant Concerning the invention a power plant is presented for providing a total electrical power output during a delivery period. In addition, a method for providing a constant electrical power output by using the power plant is provided. The power plant comprises at least one tidal power generator for providing a tidal electrical power output during the delivery period and at least one energy storage system for providing a storage electrical output during the delivery period, wherein the total electrical power output is a result of a combination of the tidal electrical power output and the storage electrical power output. The power plant comprises a tital power plant. A minimum of the total electrical power output of the power plant can be guaranteed. The resulting electrical power output is constant during the delivery period (e.g. day or month). Moreover method for designing a battery for the power plant is presented. For this method at least one sizing method for sizing the battery is used which is selected from the group consisting of heuristic battery sizing, simulation based battery sizing and optimization based battery sizing.

Claims which contain your search:

1. Power plant (1) for providing a total electrical power output (10) during a delivery period (100); the power plant (1) comprises:- at least one tidal power generator (11) for providing a tidal electrical power output (110) during the delivery period (100) ; and- at least one energy storage system (12) for providing a storage electrical output (120) during the delivery period (100) ;wherein- the total electrical power output (10) is a result of a combination of the tidal electrical power output (110) and the storage electrical power output (120).

2. Power plant according to claim 1, wherein the energy storage system (12) comprises at least one electrical energy storage system (121).

3. Power plant according to claim 2, wherein the electrical energy storage system (121) comprises at least one electrochemical energy storage system (1211).

4. Power plant according to claim 3, wherein the electrochemical energy storage system (1211) comprises at least one battery (1212).

5. Power plant according to one of the claims 1 to 4, wherein the electrical energy storage system (121) can be charged by electricity of the tidal power generator (11).

6. Method for providing a total electrical power output (10) during a delivery period (100) by using a power plant (1) according to one of the claims 1 to 5, wherein the total electricity output (10) of the power plant (1) during the delivery period (100) results from the combination of the tidal electrical power output (110) during the delivery period (100) and the storage electrical power output (120) during the delivery period (100).

9. Method according to one of the claims 6 to 8, wherein a discharging of the energy storage system (12) from stored energy during the delivery period (100) is carried out.

11. Method according to one of the claims 6 to 10, wherein a charging of the energy storage system is carried out during a charging period.

13. Method according to claim 11 or 12, wherein for the charging of the energy storage system electrical power of the tidal generator (11) is used.

14. Method for designing a storage capacity of a battery for the energy storage system of the power plant according to one of the claims 1 to 5, wherein at least one sizing method for sizing the battery is used which is selected from the group consisting of heuristic battery sizing, simulation based battery sizing and optimization based battery sizing.


Patent
Siemens AG | Date: 2016-10-19

There is described a system for storing energy, the system comprising (a) a thermal storage (110) for storing thermal energy, and (b) a steam generator (120) comprising a fluid input (122) and a fluid output (124), the fluid input and the fluid output being in fluid communication with the thermal storage, the steam generator further comprising a preheating device (130) for preheating a steam turbine fluid, wherein the thermal storage is adapted to receive a working fluid from a thermal energy source during a charging phase, wherein the thermal storage is adapted to output the working fluid for transportation to the fluid input of the steam generator during a discharging phase, and wherein the steam generator is adapted to heat the preheated steam turbine fluid using the working fluid received at the fluid input and to output the used working fluid through the fluid output for transportation to the thermal storage, such that thermal energy remaining in the output working fluid is injected into the thermal storage. Further, there is described a power plant and a method of storing energy.

Claims which contain your search:

1. A system for storing energy, the system comprisinga thermal storage (110) for storing thermal energy, anda steam generator (120) comprising a fluid input (122) and a fluid output (124), the fluid input and the fluid output being in fluid communication with the thermal storage, the steam generator further comprising a preheating device (130) for preheating a steam turbine fluid,wherein the thermal storage is adapted to receive a working fluid from a thermal energy source during a charging phase,wherein the thermal storage is adapted to output the working fluid for transportation to the fluid input of the steam generator during a discharging phase, andwherein the steam generator is adapted to heat the pre-heated steam turbine fluid using the working fluid received at the fluid input and to output the used working fluid through the fluid output for transportation to the thermal storage, such that thermal energy remaining in the output working fluid is injected into the thermal storage.

6. The system according to any of the preceding claims, wherein the thermal storage comprises a first opening (112) and a second opening (114), wherein the first opening is in fluid communication with the fluid input of the steam generator, and wherein the second opening is in fluid communication with the fluid output of the steam generator.

7. The system according to the preceding claim, further comprising a heating device arranged in a fluid path between the second opening of the thermal storage and the first opening of the thermal storage.

8. The system according to claim 6 or 7, further comprising a controller adapted to end the charging phase when the temperature at the second opening of the thermal storage reaches a predetermined temperature value.

9. The system according to any of claims 1 to 5, wherein the thermal storage comprises a first thermal storage unit and a second thermal storage unit, wherein the first thermal storage unit is in fluid communication with the thermal energy source and the fluid input of the steam generator, and wherein the second thermal storage unit is in fluid communication with the fluid output of the steam generator.

10. The system according to any of the preceding claims, wherein the thermal storage comprises a bulk thermal storage material.

12. A power plant comprisinga power generator for producing electrical energy based on a renewable energy source, anda system (100) according to any of the preceding claims, wherein the system is adapted to store excess energy from the power generator during overproduction by charging the thermal storage, and wherein the system is adapted to release stored energy during insufficient production by discharging the thermal storage.

13. A method of storing energy, the method comprisingfeeding a heated working fluid to a thermal storage to store thermal energy in the thermal storage during a charging phase,preheating a steam turbine fluid during a discharging phase to provide a preheated steam turbine fluid having a temperature closer to a corresponding boiling point,feeding the working fluid from the thermal storage to a fluid input of a steam generator during the discharging phase, wherein the steam generator is adapted to heat the preheated steam turbine fluid using the working fluid, andconducting the used working fluid from a fluid output of the steam generator to the thermal storage to store thermal energy remaining in the working fluid.


Patent
Siemens AG | Date: 2014-09-11

An energy storage device includes a battery with at least one battery cell and two poles, two connection points each connected to battery pole, for connecting to an external current circuit for charging and discharging the battery, a battery charge state monitoring device, an additional energy storage element different than the battery cell, a connection circuit for connecting the additional energy storage element to at least one battery pole, and at least one connection point. The connection circuit is designed such that a specified energy storage element current having a specified relationship with the total current flowing through the energy storage device is charged into and/or discharged from the energy storage element. A voltage measuring device contacts the additional energy storage element to measure an energy storage voltage, and the charge state monitoring device determines the charge state of the battery based at least on the energy storage voltage.

Claims which contain your search:

1. An energy storage device, comprising: a battery having at least one battery cell and two poles, two terminal points, each connected directly or indirectly to a respective pole of the battery, for connection to an external electrical circuit for at least one of charging or discharging the battery, an energy storage element embodied differently than the battery cell, and a connection circuit for directly or indirectly connecting the energy storage element to at least one pole of the battery and at least one terminal point, wherein the connection circuit is configured such that the energy storage element is at least one of charged or discharged with an energy storage element current having a predefined ratio to a total current through the energy storage device, a voltage measuring device connected to the energy storage element and configured to measure an energy storage voltage of the energy storage element and, a state of charge monitoring device configured to determine a state of charge of the battery based at least on the measured energy storage voltage, wherein the connection circuit comprises a first connection contact, a second connection contact, and a third connection contact, wherein the first connection contact and the second connection contact are connected in series between one of the poles of the battery and the terminal point connected to that pole of the battery, and wherein the third connection contact directly or indirectly contacts the energy storage element.

2. The energy storage device of claim 1, wherein the connection circuit is configured such that the total current in defined fractions at least one of originates from the battery and the energy storage element or is supplied to the battery and the energy storage element.

4. The energy storage device of claim 1, wherein each of the third connection contact and the second connection contact or a fourth connection contact directly or indirectly contacts a pole of the energy storage element.

5. The energy storage device of claim 1, wherein the connection circuit comprises a current measuring device configured to measure a battery current flow between the first and second connection contacts.

6. The energy storage device of claim 5, wherein the connection circuit has a current source and/or a current sink between the third connection contact and the second or fourth connection contact, wherein the current source and/or the current sink is controllable depending on the battery current flow.

7. The energy storage device of claim 1, wherein the connection circuit comprises: a current measuring device configured to measure a battery current flow between the first and second connection contacts, and a current control element configured to determine a current flow through the current control element depending on the battery current flow, between the third connection contact and the second connection contact or a fourth connection contact.

8. The energy storage device of claim 7, wherein at least one of the current control element or the current measuring device comprises at least one transistor.

9. The energy storage device of claim 7, wherein the connection circuit comprises a current mirror, wherein a current flow between the third connection contact and the second or the fourth connection contact is determined by a current flow between the first connection contact and the second connection contact.

10. The energy storage device of claim 1, wherein the connection circuit comprises a DC voltage converter.

11. The energy storage device of claim 1, wherein the connection circuit galvanically isolates the battery from the energy storage element.

13. The energy storage device of claim 1, wherein a plurality of energy storage elements are connected in parallel with each another.

14. The energy storage device of claim 1, wherein the state of charge monitoring device is configured to: store a plurality of temporally spaced voltage measurement values and/or determined states of charge of the battery and/or of the energy storage element, and calculate the state of charge of the battery based at least on the stored voltage measurement values and/or determined states of charge of the battery and/or of the energy storage element.

15. The energy storage device of claim 1, comprising a current measuring device configured to measure an actual current variable for the current flow through the energy storage device and/or the battery and/or the energy storage element, wherein the state of charge monitoring device is configured to calculation of the state of charge of the battery and/or of the energy storage element based at least on the actual current variable and/or temporally preceding actual current variables.

16. The energy storage device of claim 1, wherein the energy storage element voltage for at least one range of the states of charge of the energy storage element has a greater dependence on the state of charge of the energy storage element than a dependence of a voltage of the battery on the state of charge of the battery in an equivalent charging range of the battery.

17. The energy storage device of claim 1, wherein the further energy storage element is an electrochemical storage cell, a capacitor, or a supercapacitor.

18. The energy storage device of claim 17, wherein the supercapacitor is a double-layer capacitor, a hybrid capacitor, or a pseudocapacitor.


Patent
Siemens AG | Date: 2016-10-12

There is described a system for storing energy, the system comprising (a) a thermal storage (110) for storing thermal energy, the thermal storage comprising a first opening (112) and a second opening (114), and (b) a steam generator (120) comprising a fluid input (122) and a fluid output (124), the fluid input (122) being in fluid communication with the first opening (112) of the thermal storage (110) and the fluid output (124) being in fluid communication with the second opening (114) of the thermal storage (110), wherein the thermal storage (110) is adapted to receive a working fluid from a thermal energy source at the first opening (112) during a charging phase, wherein the thermal storage (110) is adapted to output the working fluid through the first opening (112) for transportation to the fluid input (122) of the steam generator (120) during a discharging phase, and wherein the steam generator (120) is adapted to heat a steam turbine fluid using the working fluid received at the fluid input (122) and to output the used working fluid through the fluid output (124) for transportation to the second opening (114) of the thermal storage (110), such that thermal energy remaining in the output working fluid is injected into the thermal storage (110) through the second opening (114). Further, there is described a power plant and a method of storing energy.

Claims which contain your search:

1. A system for storing energy, the system comprisinga thermal storage (110) for storing thermal energy, the thermal storage comprising a first opening (112) and a second opening (114), anda steam generator (120) comprising a fluid input (122) and a fluid output (124), the fluid input (122) being in fluid communication with the first opening (112) of the thermal storage (110) and the fluid output (124) being in fluid communication with the second opening (114) of the thermal storage (110),wherein the thermal storage (110) is adapted to receive a working fluid from a thermal energy source at the first opening (112) during a charging phase,wherein the thermal storage (110) is adapted to output the working fluid through the first opening (112) for transportation to the fluid input (122) of the steam generator (120) during a discharging phase, andwherein the steam generator (120) is adapted to heat a steam turbine fluid using the working fluid received at the fluid input (122) and to output the used working fluid through the fluid output (124) for transportation to the second opening (114) of the thermal storage (110), such that thermal energy remaining in the output working fluid is injected into the thermal storage (110) through the second opening (114).

2. The system according to the preceding claim, further comprising a controller adapted to end the charging phase when the temperature at the second opening (114) of the thermal storage (110) reaches a predetermined temperature value.

4. The system according to any of the preceding claims, further comprising a heating device (150) in fluid communication with the first opening (112) of the thermal storage (110), wherein the heating device (150) is adapted to heat the working fluid during the charging phase.

5. The system according to the preceding claim, wherein the heating device (150) is adapted to transform electric or magnetic energy into heat.

6. The system according to claim 4 or 5, further comprising a first pumping device for transporting heated working fluid from the heating device to the first opening (112) of the thermal storage (110).

7. The system according to any of claims 4 to 6, wherein the heating device (150) is in fluid communication with the second opening (114) of the thermal storage (110), the system further comprising a second pumping device (140) for transporting the working fluid from the second opening (114) of the thermal storage to the heating device (150).

8. The system according to any of the preceding claims, further comprising a third pumping device (142) for transporting the working fluid from the first opening (112) of the thermal storage (110) through the steam generator (120) and on to the second opening (114) of the thermal storage (110) during the discharging phase.

10. The system according to any of the preceding claims, wherein the thermal storage (110) comprises a bulk thermal storage material.

12. A power plant comprisinga power generator for producing electrical energy based on a renewable energy source, anda system (100) according to any of the preceding claims, wherein the system is adapted to store excess energy from the power generator during overproduction by charging the thermal storage (110), and wherein the system is adapted to release stored energy during insufficient production by discharging the thermal storage (110).

13. A method of storing energy, the method comprisingfeeding a heated working fluid to a first opening of a thermal storage to store thermal energy in the thermal storage during a charging phase,feeding the working fluid from the first opening of the thermal storage to a fluid input of a steam generator during a discharging phase, wherein the steam generator is adapted to heat a steam turbine fluid using the working fluid, andconducting the used working fluid from a fluid output of the steam generator to a second opening of the thermal storage to store thermal energy remaining in the working fluid.

14. The method according to the preceding claim, wherein the charging phase is ended when the temperature at the second opening of the thermal storage reaches a predetermined temperature value.


An apparatus for state of charge compensation includes at least two energy storage modules, each energy storage module having an energy storage module voltage, at least two voltage converter modules, with each voltage converter module being electrically connected to a respective one of the at least two energy storage modules in one-to-one correspondence and forming a corresponding submodule, an electrical machine electrically connected to the at least two submodules, and a control device configured to control a flow of electrical energy between at least one of the submodules and the electrical machine.

Claims which contain your search:

1. An apparatus for state of charge compensation, comprising at least two energy storage modules, each energy storage module having an energy storage module voltage, at least two voltage converter modules, with each voltage converter module being electrically connected to a respective one of the at least two energy storage modules in one-to-one correspondence and forming a corresponding submodule, an electrical machine electrically connected to the at least two submodules, and a control device configured to control a flow of electrical energy between at least one of the submodules and the electrical machine.

2. The apparatus of claim 1, wherein the control device is configured to control at least one of the at least two submodules and the electrical machine such that the electrical energy flows from a first of the at least two energy storage modules to the electrical machine and from the electrical machine to a second of the at least two energy storage modules.

4. The apparatus of claim 3, wherein the control device is configured to control at least one of the at least two submodules and the electrical machine such that at least a portion of the electrical energy flows from a first of the at least two submodules to a second of the at least two submodules via a first of the at least two three-phase windings and a second of the at least two three-phase windings.

5. The apparatus of claim 1, wherein the control device is configured to control the flow of electrical energy such that the electrical machine removes electrical energy from or supplies electrical energy to an energy storage module having a first energy storage module charge state and supplies or removes at least a portion of the previously removed/supplied energy to/from an energy storage module having a second energy storage module charge state that is different from the first energy storage module charge state according to a predetermined operating strategy.

6. The apparatus of claim 1, further comprising a switching device disposed between two respective energy storage modules and configured to at least one of electrically connect and isolate the energy storage modules from one another.

7. The apparatus of claim 1, further comprising a heating device configured to provide the power dissipated during energy flow between the at least two submodules as a heat output.

8. The apparatus of claim 1, wherein the control device is configured to control at least one of the at least two submodules and the electrical machine such that an amount of electrical energy removed from an energy storage module having a first energy storage module charge state for driving the electrical machine is greater than an amount of electrical energy removed from an energy storage module having a second energy storage module charge state that is lower than the first energy storage module charge state.

9. The apparatus of claim 1, wherein the control device is configured to control at least one of the at least two submodules and the electrical machine such that an amount of electrical energy removed from the electrical machine and supplied to a battery storage module having a first battery storage module charge state is greater than an amount supplied to a battery storage module having a second battery storage module charge state that is different from the first battery storage module charge state.

10. A method for state of charge compensation, comprising: providing at least two energy storage module voltages, each representing a voltage drop across a corresponding energy storage module, connecting each of the at least two energy storage modules to a corresponding voltage converter module to form at least two submodules, connecting an electrical machine to the at least two submodules, and controlling an electrical energy flow between at least one of the at least two submodules and the electrical machine.


An energy storage system (1) is disclosed, which comprises an electrolyser (5), a hydrogen gas storage (6, 20) and a power plant (7, 35, 32), the electrolyser (5) being connected to the hydrogen gas storage (6, 20) and the hydrogen gas storage (6, 20) being connected to the power plant (7, 25, 32). Moreover, a method for storing and supplying energy is described. The method comprises the steps of: delivering electrical energy to an electrolyser (5); decomposing water into oxygen and hydrogen gas by means of the electrolyser (5); storing the hydrogen gas; supplying the stored hydrogen gas to a power plant (7, 25, 32); and producing electrical energy by means of the power plant (7, 25, 32).

Claims which contain your search:

1. An energy storage system (1),wherein it comprises an electrolyser (5), a hydrogen gas storage (6, 20) and a power plant (7, 35, 32), the electrolyser (5) being connected to the hydrogen gas storage (6, 20) and the hydrogen gas storage (6, 20) being connected to the power plant (7, 25, 32,characterized in that- the energy storage system comprises at least one additional gas storage for natural gas and- the energy storage system comprises a gas mixing station (29) for blending the hydrogen gas with the natural gas before combustion.

2. The energy storage system (1) as claimed in claim 1,characterised in thatthe power plant (7, 25, 32) comprises a combination of a turbine and a generator.

3. The energy storage system (1) as claimed in claim 1 or claim 2,characterised in thatit comprises a hydrogen compressor (16) which is connected to the electrolyser (5) and to the hydrogen gas storage (6, 20).

4. The energy storage system (1) as claimed in any of the claims 1 to 3,characterised in thatit comprises a power import control system and/or a power export control system.

5. The energy storage system (1) as claimed in any of the claims 1 to 4,characterised in thatit comprises a fuel gas pre-heater (28).

6. The energy storage system (1) as claimed in claim 5,characterised in thatit comprises a hydrogen expander (25) or a turbine with a generator (26) producing electrical energy, the expander (25) or the turbine being connected to the hydrogen gas storage (6, 20) through a pre-heater (22) and/or a control valve (21).

7. The energy storage system (1) as claimed in claim 6,characterised in thatthe expander (25) or the turbine is further connected through a control valve (29) to the gas mixing station or to the fuel gas pre-heater (28).

8. The energy storage system (1) as claimed in any of the claims 1 to 7,characterised in thatit comprises a heat recovery system (9, 18) which is connected to the hydrogen compressor (16) and/or to a power plant (7, 11, 25, 32) and/or to a water treatment plant (10, 15).

9. A method for storing and supplying energy with the aid of an energy storage system according to one of the claims 1 to 8,comprising the steps of:- delivering electrical energy to the electrolyser (5),- decomposing water into oxygen and hydrogen gas by means of the electrolyser (5),- storing the hydrogen gas by the hydrogen gas storage,- blending the stored hydrogen gas the natural gas which is stored in an additional gas storage,- supplying the blended hydrogen gas to a power plant (7, 25, 32), and- producing electrical energy by means of the power plant (7, 25, 32).

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