| The instantaneity of generatiog-transmission-distribution-using has been the bottleneck in the development of the power system, after entering the 21st century the emergence of energy storage technology has been considered to be an effective way to solve this problem. In recent years, with the progress of technology, energy storage technology is obtained the rapid development, and in calm, trace output, FM, and other fields play a bigger role, as the energy storage system in a power system access capacity increasing, its influence on power system is increasingly obvious, build accurate equivalent model of the energy storage system for power system simulation domain.This paper first analyzes the lithium battery, nickel metal hydride batteries, flow batteries, lead-acid battery,the outside characteristics of four kinds of typical electrochemical batteries, on the basis of fully study of the common characteristic, to build the DC side of electrochemical batteries uniform equivalent model, the model on the basis of PNGV model added a switch element, the external characteristics of four typical electrochemical batteries has strong ability of description, and based on four kinds of typical electrochemical cell model was tested with experimental data, the results show that the proposed unified equivalent model can satisfy the demand of the power system simulation, at the same time use the nonlinear mapping ability of neural network powerful typical electrochemical batteries for the exploration of equivalent modeling, results show that the neural network model with feedback branch can effectively describe the external characteristic of various kinds of electrochemical batteries.In dc side is unified, on the basis of the equivalent model of electrochemical battery grid system has carried on the detailed research, including the grid topology analysis and modeling, the new LCL third-order filter design and calculation, selection and application of control strategies, etc. Based on Matlab/simulink according to the classical control strategy, the grid simulation model of electrochemical battery energy storage system has been constructed. Besides, it has been added to the simple power system network simulation in order to examine the electromechanical transient characteristics. Combined with its electromechanical transient characteristics, the transfer function of control system has been deduced, and proposed the electrochemical battery energy storage system can reflect the electromechanical transient model of output instructions. The model not only can be used to contain energy storage system of electromechanical transient simulation of power system but also help ease the application of wind power fluctuation of the simulation, which is widly applicability and few parameters and easy to recognize. Simulation examples show that the model can satisfy the energy storage system of electromechanical transient simulation and control simulation of wind power fluctuations of applications.Lastly inoder to facilitate subsequent energy storage system simulation modeling work, and to better show the research results, This paper build an electrochemical battery equivalent unified modeling and simulation system, the system includes the mechanism of modeling and the mechanism modeling two kinds of modeling method. It provides the the unified electrochemical batteries equivalent model, this model can adapt to the needs of different chemical battery modeling, moreover, the system contains the overall measuring method needed for parameter identification of the genetic algorithm in the mechanism modeling interface. The user can in the non-mechanism modeling interface, press the size of the need to set up the neural network, dynamic display of the model diagram, give full play to the strong nonlinear mapping ability of neural network, and examples show that the system fully functional, good scalability, can meet the needs of the electrochemical batteries unified equivalent modeling. |
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