State Grid Corporation of China, China Electric Power Research Institute, STATE GRID HEBEI Electrical POWER COMPANY, Henan Electric Power Company and Jiangsu Electric Power Company | Date: 2015-03-12
The present invention discloses a method for lightning stroke identification and location on optical fiber composite overhead ground wire. In the method, according to the property that the lightning stroke will cause a sudden temperature rise at the lightning stroke position on the optical fiber composite overhead ground wire, optical fiber resources in the optical fiber composite overhead ground wire and the high-sensitivity detection and high-precision event locating capability of a distributed optical fiber temperature sensor can be fully utilized. The distributed optical fiber temperature sensor is connected to a spare optical fiber in the optical fiber composite overhead ground wire, and the corresponding relation between the geographical position of the optical fiber composite overhead ground wire and the distributed temperature curve is established, and then the temperature data at the same position in the temperature curve at different moments are respectively compared to extract a sudden temperature change area. In addition, the temperature change of several positions adjacent to the sudden temperature change area in the temperature curve are compared to exclude interference factors in temperature measurement, so as to determine that the sudden temperature change is caused by instant heating from an external factor, namely the lightning stroke, and finally, the lightning stroke is identified and located in combination with the change of counting data of a lightning arrester.
Jiangsu Nanjing Power Supply Company, NARI TECHNOLOGY DEVELOPMENT Ltd COMPANY, State Grid Electrical Power Research Institute and Jiangsu Electric Power Company | Date: 2014-06-10
The invention discloses a global optimization and dispatching method based on time scales. The time scale based global optimization and dispatching method disclosed herein, relies on a target value system and a dispatch model. The global optimization and dispatching method depends on the results from a variety of subtopics. The methods provide adjustment and optimization in accordance with the time scales that are given in the sub goal of each sub topic: long-term, mid-long-term, short-term, ultra short term and real time optimization. Smart distribution grid can improve operational efficiency, integrated application of new elements in the distribution network of distribution energy network, micro grid, energy storage device and non-linear loads. This invention is fully adapted to the smart grid trends, with a good prospective.
State Grid Suzhou Power Supply Company, Jiangsu Electric Power Company, State Grid Corporation of China and State Grid Electrical Power Research Institute | Date: 2015-07-10
This invention discloses a CIM/E (Common Information Model) and CIM/G-based graphics-model-integrated apparatus and method for distribution network. The apparatus comprises an operating system for distribution systems, which is used by distribution network dispatcher and a debugging system for maintaining graphics and models. The operating system communicates with the debugging system via TCP/IP protocol, using the CIM/E Language to describe full models and incremental models of distribution network, and using the CIM/G Language to describe graphics of distribution network. This invention manages the graphics and models through the remote call, graphics-model-operation and graphics-model-rollback, achieves the management of the graphics and models of past, present and future. Through using dual systems including a debugging system and an operating system and by means of efficient exchange of CIM/E models and CIM/G graphics between the two systems, this invention realizes graphics and models update as well as rollback management, thereby improves the safety and accuracy of the graphics and models of distribution networks.
Jiangsu Electric Power Company, State Grid Corporation of China, Hohai University, Nanjing Hehai Technology Ltd Company and China Electric Power Research Institute | Date: 2014-06-10
The present invention discloses a smart power distribution system and a method to progressively dispatch the power using the same. The method is characterized in that it is based on data collection and data analysis to develop a dispatch scheme. The method steps are all automatic and self-adaptive. The method can be executed in an unattended manner to automatically correlate real time data vs. historical data, planning data vs. operation data. Based on a long cycle periodical variation and short-term random variations in load, and taking into account the temporary load power supply and maintenance needs, a multi-stage progressive multiple time scales optimal dispatching method is developed, including the distributed power, micro-grids, energy storage devices, electric vehicles charge-discharge facility and other elements of the Intelligent power distribution systems, to achieve coordinated operation of the network, power, load resources to ensure a continuous safe and reliable smart power distribution system operated at high quality and efficiency.
Jiangsu Electric Power Company and State Grid Corporation of China | Date: 2014-11-27
The present invention provides a power-cable ground current self-adaptive monitoring method. The steps including configuring a sample baseline, determining an impact factor set of the sample data, sampling real-time data of ground current by a power-cable ground current monitoring system, perform digital filtering on the sampled real-time data of ground current, applying a self-adaptive method to process the filtered sample data, and uploading the processed sample data to a backend monitoring device for real-time monitoring. The present invention may solve high energy loss and low information amount problems. The power consumption of monitoring device may be reduced by more than 50%, and server resource occupancy percentage may be lowered by about 20%. Efficiencies of evaluating external insulation status of the are enhanced. The present invention provides a novel grade ranking criterion, which may be dynamically corrected based on actual power-line operations, and reduces objective interferences during value determination process.
State Grid Corporation of China and Jiangsu Electric Power Company | Date: 2015-05-27
The invention relates to a transformer substation multi-target accurate positioning system, which comprises an intelligent positioning terminal, a sound positioning beacon node and a wireless data transmission base station. The intelligent positioning terminal can match with the sound positioning beacon node so as to perform a time synchronization on the sound positioning beacon node, and then send an ultrasonic positioning signal; the sound positioning beacon node can decode the ultrasonic signal sent by the intelligent positioning terminal to obtain positioning information by matching with the intelligent positioning terminal so as to perform the time synchronization, and transmit the positioning information to the wireless data transmission base station; and the wireless data transmission base station processes the positioning information transmitted by the sound positioning beacon node so as to obtain a position coordinate of an operator wearing the intelligent positioning terminal. The invention can position site plants in the transformer substation, identify and dynamically position the operator, ensure that the operator operates according to rules, and provide alarm bases for a violation operation which is out of scope or time, which is performed on wrong operation objects, or which destructs safety precautions.
State Grid Corporation of China, Jiangsu Electric Power Company and BEIJING KEDONG Electrical POWER CONTROL SYSTEM CO. | Date: 2014-09-30
Disclosed are a method for searching a cross-regional power supply area based on a common information model (CIM) and a system thereof. In the method, a hash function is first created according to a size of a power grid in which a power source is located; identification numbers of all devices in the power grid are mapped to a discrete hash table according to the hash function, and a collision is solved by using separate chaining; and a hash topological graph of the power grid is formed by using the discrete hash table; and a power supply area of a designated device is searched by using the hash topological graph. According to the present invention, devices in a power supply area are located rapidly and accurately by creating a discrete hash table for all device resources, so that the amount of computation is greatly reduced, and the efficiency of searching the power supply area is significantly improved.
State Grid Corporation of China, State Grid Suzhou Power Supply Company, NARI Technology Co. and Jiangsu Electric Power Company | Date: 2014-04-08
The invention provides an automatic mapping method for a distribution network based on logical layout, comprising (1) pretreating a model of the distribution network model by analyzing it, and partitioning and striping the distribution network model to generate a plurality of partial models; (2) analyzing an automatic mapping algorithm to be utilized by comparing a distribution network graph obtained by the algorithm with the distribution network model, to find out a basis for purposefully improving the partial models or the whole distribution network model; (3) achieving automatic layout of the partial models or the whole distribution network model on the basis of analysis of the automatic mapping algorithm to be utilized by combining with one or more of the force-directed layout algorithm, hybrid layout algorithm, dynamic interactive layout algorithm and an improved grid routing algorithm in order to generate the distribution network graph; and (4) analyzing and treating the automatic layout to achieve the generation of the distribution network graph with a desired practical effect. In the method of the invention, the automatic mapping of a distribution network is achieved on the basis of the distribution network by combining multiple mapping algorithms, thus the layout of the automatically generated distribution network graph is beautiful, clear and reasonable.
Jiangsu Electric Power Company and State Grid Corporation of China | Date: 2014-04-21
The present invention provides a portable single-phase air bypass switch for live power distribution network, including a housing member, a positioning member, a conductive circuit member, a clutch member, a switch-closing member and switch-opening member. The housing member includes a main sleeve tube, an insulating sleeve pipe, a flange sleeve, and a bottom cover. The positioning member includes a positioning nut, positioning frames, and a positioning column. The conductive circuit member includes a conductive end cover, an upper conductive rod, a pressing sleeve, a coupling nut, a conductive sleeve pipe, a stationary contact, a movable contact, and a lower conductive rod. The clutch member includes a clutch, a clutch ring, and a clutch sleeve pipe. The switch-closing member includes a switch-closing energy-storage rod, a switch-closing energy-storage ring, a switch-closing spring, a switch-closing positioning pin, a switch-closing release ring, and an inner sleeve pipe. The switch-opening member include a small shaft, a switch-opening spring, a stopping block, a switch-opening energy-storage shaft, a connection rod, a switch-opening energy-storage pressing head, a switch-opening positioning pin, and a switch-opening release ring. The disclosed switch integrates fast-opening and fast-closing functionalities, and solves technical difficulties of instant arc-canceling on unloaded grid lines, power cables and mixed line and bypass line operations, the work coverage in live power distribution network can thus be improved with desired security.
State Grid Corporation of China, Jiangsu Electric Power Company, State Grid Suzhou Power Supply Company, China Electric Power Research Institute and Nari Technology Co. | Date: 2014-12-16
The present invention discloses a system and a method for main distribution network graph/model/data integration based on remote access and information interaction. The system integrates graph information, model information, and real-time data of a main power transmission and transformation system into an application system by using processing methods such as remote access, SVG graphic file import, CIM model file import, an event service mechanism, and a message mechanism, to minimize mutual information dependence when the application system imports the model information, the graph information, and the real-time data in the main network power transmission and transformation system.