基于内模和滑模控制的链式STATCOM控制策略研究

Research on Integrated Control Strategy of Chain STATCOM Based on Internal Model Decoupling and Sliding Mode Control

推导了链式静止同步无功补偿器(STATCOM)的数学模型,并在此基础上提出了一种新的控制策略。针对链式STATCOM非线性、强耦合的特点,提出基于内模原理的解耦控制策略,并进一步引入滑模控制增强系统的鲁棒性。设计了基于PR控制的直流电容电压控制器,以抑制直流电容电压在启动过程中的超调和提高动态调节速度。通过MATLAB/Simulink仿真分析,验证了所提控制策略的有效性和优越性。

This paper derived the mathematical model of chained STATCOM and proposed a new control strategy.It provided a decoupling control strategy based on the internal model principle in terms of the non-linear and strong coupling characteristics of chain STATCOM.Moreover,it introduced sliding mode control to enhance robustness.It designed a DC capacitor voltage controller based on PR control to suppress the overshoot of the DC capacitor voltage during the starting process and improve the dynamic adjustment speed.It verifies the effectiveness and superiority of the control strategy through MATLAB/Simulink simulation analysis.