摘要
提出一种基于虚拟磁链的无电网电压传感器瞬时功率检测方法,用以对STATCOM进行直接功率控制(DPC)。针对传统开关表DPC因PWM变流器开关频率变化造成的滤波器设计困难等问题,采用电压空间矢量调制(SVPWM)方式实现定频控制。理论分析及仿真结果表明,基于虚拟磁链的STATCOM定频DPC系统具有结构简单、抗干扰能力强、动静态特性好等优点,实现了无功功率的快速检测和动态补偿。
An instantaneous power detection method without line voltage sensor is proposed based on the virtual flux and is used for the direct power control （DPC） of STATCOM device. To solve the difficulty of filter design caused by variable switching frequency of PWM converter in traditional switching table DPC method, this paper adopts voltage space vector modulation to achieve constant switching frequency control. Theoretical analysis and simulation result show that DPC system with constant switching frequency for STATCOM based on virtual flux has several advantages, such as a simple configuration, strong anti-interference ability, good dynamic and static performance, moreover, it realizes fast reactive power detection and dynamic compensation.
出处
《电气自动化》
2009年第5期21-23,共3页
Electrical Automation
