摘要
为实现PWM整流器系统的稳定可靠控制,在传统三相电压型PWM直接功率控制的基础上介绍了一种新的基于虚拟磁链的直接功率控制方法。通过引入SVPWM调制模块来代替传统开关表和滞环比较器,解决了传统虚拟磁链直接功率控制频率高且不稳定的问题,达到了定频的目的。同时可以获得任意方向的电压矢量,具有更低的电网电流畸变率和抗干扰能力。仿真结果证明了该控制策略的可行性。
To achieve stable and reliable control of PWM rectifier system, this text introduces a new kind of virtual flux direct power control based on traditional three-phase voltage direct power control. This control strategy replaces traditional switch table and Hysteresis comparison by introducing SVPWM modulation module, solving the problem of high and unfixed frequency in the traditional virtual flux direct power control, to reach the purpose of the fixed frequency. At the same time it can get voltage vector in any direction, with lower current distortion rate and the ability of anti-interference. The simulation results can prove the feasibility of the control strategy.
出处
《电测与仪表》
北大核心
2012年第5期25-28,共4页
Electrical Measurement & Instrumentation
基金
河南省教育厅自科基金资助项目(2010B510011)
河南科技大学科研基金资助项目(2003ZY27)
