含耦合电感的三相五电平整流器积分滑模控制

Integral Sliding Mode Control of Three-phase Five-level Rectifier with Coupled Inductors

多电平整流器在高压大功率场合具有广阔应用场景。该文对含耦合电感的三相五电平整流器进行研究,首先,分析了三相五电平整流器的工作原理并建立了数学模型。其次,针对传统滑模控制应用于该整流器存在稳态误差的问题,提出融合比例积分的非线性积分滑模控制策略,实现了整流器输出电压的无差跟踪,并利用李雅普诺夫函数验证了针对该整流器所设计积分滑模控制的稳定性。最终,以负序电压注入的方法解决了由于整流器含有多个直流输出而固有的输出电压不均衡问题,并对所提控制方法进行了仿真与实验,验证了其正确性和有效性。

Multilevel rectifiers have broad application scenarios in high voltage and high power applications.In this paper,the three-phase five-level rectifier with coupled inductor was studied.The first step was to analyze the working principle of the three-phase five-level rectifier and established a mathematical model.Secondly,in view of the problem of steady-state error when traditional sliding mode control was applied to the rectifier,a nonlinear integral sliding mode control strategy fused with proportional integral was proposed,which realized the differential tracking of the output voltage of the rectifier.And the Lyapunov function was used to verify the stability of the integral sliding mode control of the designed rectifier.Finally,the negative-sequence voltage injection method was adopted to solve the inherent output voltage imbalance problem of the rectifier with multiple DC outputs,and the proposed control method was simulated and tested to verify its correctness and effectiveness.