D-STATCOM 的输入-输出反馈线性化滑模变结构控制

摘要

To improve the dynamic performance and robustness of a distribution static synchronous compensator (D-STATCOM) control system,an input-output feedback linearization technique combined with integral sliding mode control method for D-STATCOM is presented.Input-output feedback linearization technique enables the active current and reactive current decoupling for D-STATCOM,and eliminates the non-linear dynamics on capacitor voltage at DC side,which makes it much stable.The integral sliding mode control is also adopted to improve the D-STATCOM control robustness. The simulation and physical experimental results show that the voltages at point of common coupling (PCC) and DC voltage of D-STATCOM could track their references quickly and accurately.This control strategy is insensitive to external disturbances and parameter variations.%为提高配电网静止同步补偿器(D-STATCOM)控制系统动态性能和鲁棒性,提出一种基于输入—输出反馈线性化与积分滑模控制相结合的 D-STATCOM 控制方法。该方法利用输入—输出反馈线性化实现 D-STATCOM 有功电流与无功电流的解耦,消除 D-STATCOM 直流侧电容电压的非线性特性,使之在支撑公共耦合点(PCC)处电压的同时快速稳定直流侧电压,并利用积分滑模控制增强其对参数摄动的鲁棒性。仿真和物理实验结果表明,D-STATCOM 采用文中提出的控制策略,配电网 PCC 处电压和直流侧电容电压均能快速、准确地调整到其参考值,并在外部干扰及参数变化时具有较强的鲁棒性。