Digital simulation method of battery charging and discharging process with initial state of charge can be set
A charging and discharging process and digital simulation technology, applied in the field of power system simulation research, can solve the problems of difficulty in establishing a battery model, lack of flexibility, etc., and achieve the effect of flexible and convenient application, easy implementation, and clear physical meaning of parameters
Active Publication Date: 2016-05-18
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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[0004] Aiming at the problems mentioned in the background technology that the battery model is difficult to establish and the flexibility is insufficient in the current power system energy storage modeling, the present invention proposes a digital simulation method for the charging and discharging process of the battery that can set the initial state of charge
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[0039] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.
[0040] figure 1 is the nonlinear battery model proposed by the present invention. figure 1 In , the model shown is composed of a controlled voltage source and a fixed internal resistance, and the physical meaning of each parameter and the method of separation and extraction have been introduced in detail in the content of the invention. In this model, the electromotive force of the battery is only related to the SOC of the battery, and there is a one-to-one correspondence, so that the voltage characteristics of the battery during the entire charging and discharging process can be reflected and the algebraic cycle problem of the model can be effectively avoided. In addition, this model has a simple structure and is ea...
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The invention discloses a battery charge and discharge process digital simulation method capable of setting an initial state of charge in the field of simulation research of power systems. According to the technical scheme, the battery charge and discharge process digital simulation method comprises the steps of: according to a typical battery discharge curve, separating parameters of a battery model according to the provided method; then establishing the battery model; respectively carrying out simulation checking by adopting a constant current discharge mode and a constant current-to-constant voltage charge mode; carrying out simulation checking according to different charge and discharge multiplying powers and different battery initial state of charge (SOC); and comparing a simulation checking curve with an actual battery charge and discharge curve to prove the correctness and the flexibility. The battery charge and discharge process digital simulation method is simple in extracting the parameters of an energy storage battery model, is easily realized, is clear in physical conception, is capable of freely setting the battery initial SOC according to actual demands of research contents, is flexible and convenient in application, and effectively solves the problems that the energy storage model is difficult to establish and is poor in flexibility in microgrid research.
Description
technical field [0001] The invention belongs to the field of power system simulation research, in particular to a digital simulation method for charging and discharging process of a battery which can set the initial state of charge. Background technique [0002] In recent years, new energy power generation, micro-grid and electric vehicles have developed rapidly, and scholars at home and abroad have done a lot of research work on the above fields. New energy power generation can reduce dependence on fossil fuels and reduce environmental pollution, and has attracted widespread attention. However, due to the uncontrollability of distributed power sources (such as wind power and photovoltaic power generation). The access of distributed power will have many adverse effects on the power grid. In order to solve the adverse impact of distributed power on the power system, the concept of micro-grid came into being. Micro-grid has two modes of operation: networking and islanding. D...
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IPC IPC(8): G06F17/50
Inventor 刘念董仲星张建华刘宗歧
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)