针对传统静止无功补偿器(static synchronous compensator-STATCOM)只能补充无功功率的不足,提出在直流侧并联蓄电池储能系统(battery energy storage system-BESS)进行改进的策略,从而实现有功无功功率的双重控制。本文首先对STATCOM-BESS工作原理和数学模型进行简要介绍,之后对四象限模式的运行特性进行重点分析,并提出了基于电压空间矢量(SVPWM)有功功率无功功率独立控制的电流解耦控制技术。最后在MATLAB/Simulink中搭建STATCOM-BESS模型进行仿真分析,仿真结果显示装置在快速实现无功功率补偿的同时也可以实现有功功率的控制,并具有良好的动稳态特性,因此验证了理论分析的正确性和控制方法的有效性。
英文摘要:
Due to the disadvantage of the traditional static synchronous compensator (STATCOM) for only regulating reactive power, battery energy storage system (BESS) is proposed to combine with the STATCOM to achieve dual regulation of both active and reactive power. At first, the operating principle of STATCOM-BESS is described briefly, and a mathematical model is derived. Then the operating characteristics of the four-quadrant compensation model are analyzed particularly. In the end, the STATCOM-BESS model is built by MATLAB/Simulink, SVPWM is adopted as control strategy at the same time. The simulation results show that the proposed model can precisely and quickly control both active and reactive power and has excellent dynamic and steady state characteristics, which verify the validity of the theoretical analysis and the effectiveness of the proposed SVPWM control method.