摘要
针对现有的三相PWM整流器直接功率控制系统存在的功率失调、对负载变化敏感的问题,在PWM整流器直接功率控制系统模型的基础上,采用逆系统方法,推导出三相整流器直接功率控制系统的逆系统模型,构造出伪线性系统,实现了对整流器直接功率控制系统有功功率和无功功率的解耦。使用滑模变结构控制理论对该伪线性系统进行综合,设计出滑模变结构控制器。通过计算机仿真对所提出的方法进行了验证。仿真结果表明所提出的控制策略具有较好的动态性能和稳态性能,对负载的适应能力强。
Against the existing power misadjustment, sensitive to load changes issue in DPC system of three-phase PWM rectifier, based on the DPC systemls model, an inverse system model of DPC system was deduced. And a pseudo linear system realizing the decoupling of the active and reactive power was constructed. By synthesizing the pseudo linear system, a sliding mode variable structure controller was proposed. At last some simulations were proceeded to verify the controller＇s performance. The simulation results show that the control strategy mentioned has good dynamics, steady state performance and strong ability to adapt load changes.
出处
《电气传动》
北大核心
2008年第10期33-38,共6页
Electric Drive
关键词
PWM整流器
直接功率控制
逆系统方法
滑模变结构控制
PWM rectifier
direct power control
inverse system method
sliding mode variable structurecontrol
