应用于高压直流输电系统的混合有源电力滤波器

Hybrid Active Power Filter Used in High-Voltage Direct Current Transmission System

针对高压直流输电系统(HVDC)换流站的交流侧谐波造成了电能质量下降的问题,在传统混合有源电力滤波器的基础上提出一种新结构——混合有源电力滤波器(HAPF).即将有源电力滤波器(APF)部分与基波谐振支路并联后,以一双调谐滤波器作为注入支路,同时又独立挂载一双调谐滤波器,以无源电力滤波器(PPF)滤除一部分谐波,APF部分滤除一部分谐波.从注入支路的阻抗特性、无功静补偿能力、谐波抑制特性和系统的稳定性几个方面分析混合有源电力滤波器的优越性,并利用MATLAB/SIMULINK平台对所提的新结构进行仿真分析.实验结果表明:该混合有源电力滤波器具有良好的谐波补偿性能.

A new s tructure, hybrid active power filter （HAPF） , has been proposed on the basis of traditional hybrid active power filter to solve problems about decline of power quality caused by the high voltage direct current （HVDC） transmission system on the ac side harmonics. In the new structure, the active power filter （APF） has been made in parallel with the fundamental wave resonance branch, then with a pair of tuned filter as the injection branch, and at the same time a pair of tuned filter been independently mounted to filter part of the harmonic through passive power filter （PPF） as well as APF. Several advantages of the hybrid active pow-er filter have been analyzed from the injection branch impedance characteristics？ the reactive power static com-pensation capacity, harmonic suppression characteristics and the stability of the system. And the new structure has been simulated in the MATLAB/SIMULINK. The experimental results show that the hybrid active power filter has good harmonic compensation performance.