摘要
针对交流励磁发电机输出的电力谐波特征 ,研究了谐波抑制所需滤波器拓扑结构和检测控制方法 ,获得了一种较为理想的混合型滤波器结构形式和混合式检测控制方法 ,通过采用 PWM调制技术和磁势补偿原理 ,有效地解决了串联 APF中低频谐波功率补偿信号的传输问题 .仿真和实验证实了该方法滤波效果好、系统稳定性高、对变化的基波频率有很强的自适应能力 ,是一种适合于复杂供用电系统电力谐波抑制的有效方案 .
In this work, after analysing the nature of the power harmonics generated by an A.C. excited generator, an in phase correlation filtering technique based on the frequency shifting principle was adopted; the topologic structure of the filter and the detection control method for suppressing harmonics were investigated and a more idealized hybrid filter and its composite detection control were developed. The low frequency harmonic compensation signal's difficulty in passing through the injection transformer of a series APF was effectively solved by using pulse width modulation (PWM) technique and magnetomotive force (MMF) compensation principle. Simulation and experiments proved this measure is good in filtering performance, stable in system operation and, especially, self adaptive to the varying fundamental frequency. As a result, compared to the conventional methods,this is a more effective harmonic suppression scheme suitable for complex power supply system such as the A.C. excited generator.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2002年第4期432-436,共5页
Journal of Zhejiang University：Engineering Science
基金
国家自然科学基金资助项目 (5 98770 2 1) .
