三相四线制D-STATCOM的工作原理与仿真

摘要

介绍了并联型配电网无功补偿装置（D-STATCOM）的工作原理、基本结构和控制策略,利用Matlab/Simulink中的电力系统仿真模块箱（PSB）建立了D-STATCOM系统的仿真模型并进行了仿真。电流检测方法和电流控制方法分别采用改进的ip-iq法和滞环控制方法,改进的ip-iq法由于实时性较好,在三相电压畸变的情况下能准确地检测谐波分量,而滞环控制控制简单,鲁棒性好,对负载的适应能力强,在目前的控制条件具有广泛的应用。通过仿真的结果表明采用的改进ip-iq谐波电流检测方法和滞环控制方法的满足电流所需要补偿的要求。%In the paper,the working principle,basic structure and control strategy of parallel D-STATCOM is introduced.Use the PSB in Matlab/Simulink to establish simulaition model of D-STATCOM.Improved ip-iq has a good real-time and it can detecte harmonic accurately in the three-phase voltage distortion;hysteresis control is simple,robust,strong ability to adapt to load and has been widely used in the present control condition;so improved ip-iq is used in electric current detection and hysteresis control is used in current control.The simulation results prove that the method above satisfy the requirements of the compensation current.