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Xiao P.,a Thermadyne Industries Inc. | Venayagamoorthy G.K.,Missouri University of Science and Technology | Corzine K.A.,Missouri University of Science and Technology | Huang J.,SatCon Technology Corporation
IEEE Transactions on Power Electronics | Year: 2010

When designing and building power systems that contain power electronic switching sources and loads, system integrators must consider the frequency-dependent impedance characteristics at an interface to ensure system stability. Stability criteria have been developed in terms of source and load impedance, and it is often necessary to measure system impedance through experiments. Traditional injection-based impedance measurement techniques require multiple online testing that lead to many disadvantages, including prolonged test time, operating point variations, and impedance values at limited frequency points. The impedance identification method proposed in this paper greatly reduces online testing time by modeling the system with recurrent neural networks with adequate accuracy. The recurrent networks are trained with measured signals from the system with only one stimulus injection per frequency decade. The measurement and identification processes are developed, and the effectiveness of this new technique is demonstrated by simulation and laboratory tests. © 2010 IEEE.


Mossoba J.,SatCon Technology Corporation | Ilic M.,SatCon Technology Corporation | Casey L.,SatCon Technology Corporation
2010 IEEE Conference on Innovative Technologies for an Efficient and Reliable Electricity Supply, CITRES 2010 | Year: 2010

The increasing presence of photovoltaic(PV) renewable power generation and plug-in hybrid electric vehicles (PHEV) in national infrastructure leaves utilities, PV-inverter and battery charger manufacturers searching for means to mitigate destabilizing effects of renewable intermittency and battery charging loads on traditional utility grids. Small amounts of battery storage can be interfaced to the PV-inverter system's dc-link to effectively reduce the fast transient changes in PV output power, enabling a greater presence of grid-interactive PV generation and providing means of alleviating the grid from growing demands of battery charging loads. ©2010 IEEE.


Traube J.,University of Colorado at Boulder | Lu F.,University of Colorado at Boulder | Maksimovic D.,University of Colorado at Boulder | Mossoba J.,SatCon Technology Corporation | And 6 more authors.
IEEE Transactions on Power Electronics | Year: 2013

Mitigation of the variability in output power of renewable generators such as solar photovoltaic (PV) systems is a growing concern as these generators reach higher penetrations on electric grids. Furthermore, increased penetration of electric vehicle (EV) loads presents a challenge for distribution feeders. This paper presents a system where a bidirectional, highly efficient, dc- dc EV charger is placed between the high-voltage dc bus of a PV inverter and the EV battery. The system partially alleviates feeder overloading by providing fast charging for the EV battery from the PV system. In addition, the charger is capable of diverting fast changes in PV power output to the battery, thereby reducing the rate of change of inverter output power to a level below the ramp rate of existing grid resources. The paper addresses sizing of the charger and energy storage based on the PV system rating, the desired maximum ramp rate, and site solar irradiation characteristics, including geographic dispersion of PV arrays. Analysis suggests that small amounts of energy storage can accomplish large reductions in output power ramp rate. Experimental results are shown for a 10 kW, 98% efficient dc-dc charger based on bidirectional four-phase zero-voltage-switching converter. © 2012 IEEE.


Schauder C.,SatCon Technology Corporation
IEEE Power and Energy Society General Meeting | Year: 2011

Photovoltaic (PV) inverters may be subject to different standards and interconnection requirements, depending on their size and interconnection point. PV plants connected at transmission voltage levels may be expected to ride through faults and other disturbances, as expressed in FERC Order 661-A for wind power plants. Islanding detection is not necessary, because customers are not directly served from these plants. On the other hand, PV units connected to distribution feeders are expected to trip automatically during voltage and frequency excursions, as expressed in IEEE Std. 1547. Distribution-connected PV inverters have islanding detection that is designed to meet UL 1741. These conflicting requirements may appear as "wind vs. solar" or "transmission vs. distribution" viewpoints. The impacts on utility-scale PV inverter design and specification are discussed. © 2011 IEEE.


Patent
SatCon Technology Corporation | Date: 2010-10-27

A system for automatically regulating voltage on a distribution-level AC bus having an actual voltage and a nominal voltage includes an electronic power converter connected to the distribution-level AC bus. The system generates a feedback signal representative of the actual voltage of the distribution-level AC bus and produces an input control signal in response to the feedback signal. The input control signal is representative of a commanded level of reactive power. The electronic power converter is responsive to the input control signal to deliver a commanded reactive power output to the distribution-level AC bus, and the commanded reactive power output pushes the actual voltage towards the nominal voltage.


Patent
SatCon Technology Corporation | Date: 2011-03-23

A surge protection arrangement for protecting against an overvoltage condition in an electrical circuit having a power source and an electrical load includes a reactive component (such as a capacitor or an inductor) and a switching circuit connected to the reactive component. The switching circuit causes surge energy to flow to the reactive component in response to an overvoltage condition in the electrical circuit so that the surge energy is stored in the reactive component.


Trademark
PERFECT GALAXY INTERNATIONAL Ltd and SatCon Technology Corporation | Date: 2010-06-15

Power conditioning and power distribution devices, namely, grid-connected electronic converters, microconverters, inverters, and microinverters.


Trademark
SatCon Technology Corporation | Date: 2011-08-30

Power conditioning and power distribution devices, namely, grid-connected electronic converters, microconverters, inverters, and microinverters.


Trademark
SatCon Technology Corporation | Date: 2011-05-10

Power control, power conditioning, and power conversion products for use in connection with renewable and alternative energy sources, namely, converters, inverters, microconverters, microinverters, and software for controlling converters, inverters, microconverters, microinverters for use with solar energy, wind energy, hydraulic flow energy, and/or fuel cells. Engineering services, namely, for development and design of power control products for use in connection with renewable and alternative energy sources, development and design of power conditioning products for use in connection with renewable and alternative energy sources, development and design of power conversion products for use in connection with renewable and alternative energy sources, and development and design of software products for power control, power conditioning, power management, and power conversion industries.


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