摘要
针对静止同步补偿器(STATCOM)由于死区、网侧电压畸变等原因造成的输出电流畸变严重现象,提出了谐波自补偿的STATCOM控制方法,以降低电流畸变率,提高装置输出电流的质量。在传统实时电流跟踪的基础上增加一个谐波补偿前馈环节,使用全谐波检测提取电流谐波分量,通过向调制波中注入与全谐波大小相等、方向相反的信号对其进行重构,从而修正波形畸变并降低电流总畸变率。Matlab仿真研究验证了所提方法的正确性。最后,通过STATCOM试验原型证明了该方法的有效性。
In order to solve the output current distortion phenomenon of static synchronous compensator （STATCOM）, which was caused by the dead-time effect and voltage distortion, the STATCOM control method based on self-harmonic compensation was proposed to reduce the current distortion rate and improve output current waveform. In the proposed method, a harmonic compensation feed-forward was added in the traditional real-time current tracking method. It uses full-harmonic detection and injects the opposite harmonic signal into PWM modulation wave for reconstruction. This method corrects current waveform distortion and reduces the total harmonic distortion rate of the output current. Matlab simulation result verifies the correctness of the proposed optimized method. Finally, STATCOM experimental prototype proves the validity of this method.
出处
《低压电器》
2012年第24期42-45,50,共5页
Low Voltage Apparatus
基金
国家自然科学基金(60504010)
国家高新技术863发展计划(2008AA04Z129)
关键词
静止同步补偿器
电流畸变
谐波自补偿
全谐波检测
static synchronous compensator （ STATCOM ）
current distortion
serf-harmonic compensation
full-harmonic detection
