STATCOM系统中信号延时的改进方法研究

Research on the Improvement Method of Signal Time Delay in STATCOM System

针对现阶段STATCOM系统中存在的信号延时问题,从STATCOM拓扑结构、基本原理、检测算法、信号调理和控制策略等方面进行分析,提出了改进延时的方法。基于瞬时无功理论的ip、iq电流检测算法实时性高,在电流检测中加入预估补偿角度补偿延时,有效减少了系统延时。运用基于滞环的双环控制策略调制产生PWM驱动信号,稳定性高。对STATCOM系统进行MATLAB仿真,并搭建实验样机,仿真和实验验证了该方法的可行性。

According to the signal delay problem in the present STATCOM systems, this article carries on the analysis to the signal time delay from the STATCOM topology structure, basic principle, detection algo- rithm, signal conditioning and control strategy and so on, and put forward the method of improving the time delay. This paper adopts the ip, iq current detection algorithm based on the theory of instantaneous reactive power, high real time capability, and adds predictive compensation angle to compensate the delay time in the current detection, effectively reduces the system delay; Using the double loop control strategy based on hyster- esis loop PWM modulation to generate drive signal, high stability; Then using MATLAB simulates the STAT- COM system and builds the experimental prototype. Simulation and experimental results verifies the feasibility of the method.