| 摘要: |
| 针对目前电网用户侧用电分布不均对电网产生的冲击和现阶段部分储能电池的利用率较为低下、寿命较短等问题进行研究，提出了模块化储能电池并网的方案；利用升降压电路、均衡电路以及能源管理控制相结合形成的电池模块取代传统的电池组直接串并联，通过PCS电路连接变压器将电池模块并网；在对PCS系统进行研究时，采取准比例谐振控制和比例积分控制结合的控制策略，在两相静止坐标系控制下，保证无静差追踪，使用电压电流双环控制，保证并网的准确性和稳定性；最后对研究进行MATLAB实验仿真，得到的并网电流符合要求，证明了研究的可行性：可以通过电池模块对所要缓解压力的用户侧变压器进行并网减压。 |
| 关键词: 电池模块化 磷酸铁锂电池 PCS PI控制 准PR控制 |
| DOI： |
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| Research on Modularization and PCS Control Strategy of Lithium Battery System |
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CHEN Chen,HE Le,ZHAO Xiang
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| Abstract: |
| Aiming at the impact of uneven distribution of power consumption on power grid, the low utilization rate and short life of some energy storage batteries at the present stage, a scheme of modular energy storage battery interconnection is proposed. Battery modules are formed by combining voltage-up and voltage-down circuit, equalization circuit and energy management control to replace traditional batteries directly in series and parallel. Battery modules are connected to transformers through PCS circuit for grid connection. In the study of PCS, a control strategy combining quasi-proportional resonance control and proportional integral control is adopted. Under the control of two-phase stationary coordinate system, no static error tracking is ensured, and voltage and current double-loop control is used to ensure the accuracy and stability of grid connection. Finally, the research is simulated by MATLAB experiment, and the grid-connected current meets the requirements, which proves the feasibility of the research. The grid-connected decompression of the user-side transformer to alleviate the pressure can be carried out through the battery module. |
| Key words: battery modularization lithium iron phosphate battery PCS PI control quasi PR control |
