基于FBD法的STATCOM的研究

针对三相四线制配电网的无功、谐波检测的实时性和零线电流抑制问题,采用了双DSP控制的三相四桥臂statcom解决方案。系统的无功和谐波检测方式采用了FBD法,可减轻DSP计算量;系统的控制方式采用了双DSP控制,一片DSP主要负责信号数据采集,另一片DSP主要负责指令电流的运算,可以大大提高系统的运行速度,保证了statcom补偿的实时性。本文介绍了三相四桥臂statcom的检测和控制方式,并对系统的硬件构成和软件主程序流程作了阐述。仿真和实验结果验证了此方法的可行性。

Studay of STATCOM based on FBD method

To resolve the problem of the reactive power 、harmonics real-time detection and zero line current suppression of three-phase four-wire distribution network,the solution of a dual-DSP control of three-phase four-leg statcom is used.Using FBD method on the reactive power and harmonics detection method of system can reduce the computation of DSP;the control method of system uses a dual-DSP control,a DSP is mainly responsible for signal data acquisition,another piece of DSP is mainly responsible for instruction current operation,it can greatly improve the speed of system and ensure the compensation of statcom in real time.This article describes the detection and control method of three-phase four-leg statcom,and elaborates the hardware structure and software main program flow of system.Simulation and experimental results show the feasibility of the method.