摘要
整流机组是典型的非线性谐波源,其产生的谐波电流注入电网,造成母线电压畸变,导致系统内其他设备无法安全稳定运行。多脉动整流机组的谐波发生量和机组运行方式密切相关,对称运行工况下的多脉动整流机组的谐波电流可以互相抵消。文章介绍了多脉动整流机组的谐波统一分析和计算方法,通过理论计算得到多脉动整流电路在对称和不对称运行方式下的谐波电流计算公式。从理论分析得出谐波发生量最小的机组组合方式,以此来指导生产运行。同时对安装在不同位置的滤波装置的谐波改善效果进行对比,说明加装在高压侧的滤波装置效果优于第3绕组侧。
Rectifier unit is typical non-linear harmonic sources and injection of its generated harmonic current into the power network causes distortion of busbar voltage and leads other equipment in the system not operate safely and stably. The amount of harmonic generation of the multi-pulsation rectifier unit is related closely to the operation mode of the unit and the harmonic current of the multi-pulsation rectifier unit can be offset each other at symmetrical operation condition. In this paper,the unified analysis and the calculation method on harmonics of the multi-pulsation rectifier unit are introduced and the calculation formula on the harmonic current of multi-pulsation rectifier circuit at symmetrical and asymmetrical operation condition is obtained by the theoretical calculation. The unit combination with minimum harmonic generation amount is obtained by the theoretical analysis,which is sued to instruct production operation. At the same time,the harmonic improvement result of the filtering devices installed at different locations is compared,showing that the result of filtering device installed on the high voltage side is more superior to that on the tertiary winding side.
出处
《电力电容器与无功补偿》
北大核心
2015年第5期74-79,87,共7页
Power Capacitor & Reactive Power Compensation
关键词
整流电路
谐波分析
不对称运行
滤波器
rectifier circuit
harmonics analysis
asymmetrical operation mode
filter
