具有丰富谐波负荷的无功补偿和谐波抑制

建立了一个公共连接点短路参数(电感)与无功补偿电容的L-C并联谐振模型.谐振的驱动信号是用户晶闸管变流器产生250、350、550、650、850 Hz乃至更高频的谐波.谐振对电网、用户晶闸管变流器以及无功补偿装置都有危害.提出了在补偿电容上串联适当的限流电感把固有谐振频率控制在低于130 Hz的办法,这样电能质量能得到改善、用户能进行有效的无功补偿、无功补偿装置能保证可靠运行.

Reactive Power Compensation of Rich Harmonic Load and Harmonic Restraint

This paper proposes a parallel resonance L - C model of short circuit inductance at the point of common coupling with reactive power compensating capacitance. The driven resonance signals were harmonie waves of 250 Hz, 350 Hz, 550 Hz, 650 Hz, 850 Hz and even higher ones, generated by consumer thyristor conveners. Such resonance is harmful to power nets, consumer thyristor conveners and reactive power compensating equipment. An approach was put forward in which inherent resonance controlled at less than 130 Hz by putting compensation capacitors in parallel with appropriate current limiting inductance, thus improving the quality of electric enertrgy, ensuring consumers effective reactive power compensation, and guaranteeing sound running of reactive compensation equipments.