Method for constructing battery energy storage system model in multi-time scale dynamic simulation
A battery energy storage system, multi-time scale technology, applied in the field of construction, can solve problems such as inability to fully consider characteristics
Active Publication Date: 2014-12-17
STATE GRID CORP OF CHINA +1
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Problems solved by technology
However, in the existing energy storage system modeling methods, the electromechanical transient and medium- and long-term dynamics of the battery energy storage system are modeled and analyzed separately, and the characteristics after grid connection cannot be fully considered. Therefore, it is necessary to establish a system that can accurately reflect the battery energy storage system. A Model of Multi-time Scale Operating Characteristics of the System
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[0067] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0068] The present invention proposes a method for constructing a battery energy storage system model in multi-time scale dynamic simulation. The battery energy storage system model can simulate the slow change of the state of charge during the discharge process and the change of the voltage and current of the DC side of the chemical battery; at the same time, The grid-connected control system model is established, which realizes smooth control and additional frequency control, and adopts different control methods or hybrid control methods according to different application scenarios, so that the model can analyze the grid-connected multi-time scale characteristics of the battery energy storage system . Among them, the energy storage battery circuit part has electromechanical transient characteristics, and the state of charge is a slow changing process with m...
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The invention provides a method for constructing a battery energy storage system model in multi-time scale dynamic simulation. The method comprises the steps of establishing an energy storage battery model, determining output voltage Vdc (t) and current Idc (t) of an energy storage battery; inputting power grid frequency f and the sum PPV+wind of wind power and photovoltaic active power to a grid-connected control system model, obtaining an output power target value Pref of the model; inputting Vdc (t), Idc(t) and Pref to a converter and a control system of the converter, and obtaining alternating current side current d-axis component Id and q-axis component Iq. The method achieves continuity from the electromechanical transient process to the medium and long term dynamic process, and the electromechanical transient and medium and long term dynamic multi-time scale simulation requirements of a power system are met.
Description
technical field [0001] The invention relates to a construction method, in particular to a construction method of a battery energy storage system model in multi-time scale dynamic simulation. Background technique [0002] The whole process dynamic simulation program can have a good simulation effect on the electromechanical transient state and medium and long-term dynamics of the energy storage system. The detailed modeling of the battery energy storage system in the whole process dynamic simulation program can reflect its impact on the electromechanical transient state. The impact of the process can also reflect its impact on the medium and long-term process, so the modeling work is of great significance. [0003] In recent years, my country's power system construction is in a stage of rapid development. Due to energy shortages, new energy sources such as photovoltaics and wind power have also developed rapidly. The influence of the operation of the power system is increasin...
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IPC IPC(8): H02J3/28
CPCY02E10/56Y02E40/10Y02E70/30
Inventor 叶小晖秦召磊宋新立吴丽娜仲悟之刘涛苏志达吴国旸刘金龙
Owner STATE GRID CORP OF CHINA