HVDC用交流电容器典型滤波支路谐波电流对电容器噪声的影响分析  

Analysis on the Influence of Harmonic Current on Capacitor Noise in Typical Filtering Branch of AC Capacitor for HVDC Application

作　　者：雷乔舒 何强 赵寿生 段军 聂京凯 LEI Qiaoshu;HE Qiang;ZHAO Shousheng;DUAN Jun;NIE Jingkai(Wuxi Sunking Power Capacitor Co.,Ltd.,Jiangsu Wuxi 214177,China;Global Energy Interconnection Research Institute Co.,Ltd.,Beijing 102211,China;State Grid Jinhua Power Supply Company,Zhejiang Jinhua 321000,China)

机构地区：[1]无锡赛晶电力电容器有限公司,江苏无锡214177 [2]全球能源互联网研究院有限公司,北京102211 [3]国网浙江省电力有限公司金华供电局,浙江金华321000

出　　处：《电力电容器与无功补偿》2020年第3期50-56,共7页Power Capacitor & Reactive Power Compensation

基　　金：国家电网有限公司总部科技项目(521104170041)。

摘　　要：本文通过总结分析近几年直流输电项目交流电容器典型滤波支路的特征谐波电流参数,分析不同滤波支路谐波电流对电容器噪声的影响。通过对各典型滤波支路在100~500 Hz、550~1 200 Hz、1 250~2 500 Hz频段谐波电流的占比分析,获得550~1 200 Hz、1 250~2 500 Hz中高频段谐波电流与基波电流的占比、累积谐波个数是影响电容器噪声的主要因素;在相同谐波电流的前提下,电容器单元电容越大,噪声水平越低;通过试品噪声实测,对理论分析充分印证。该结论对今后在投标阶段、产品研制前期进行各支路电容器的噪声评估具有重要意义;同时不同频段谐波电流可采用不同的降噪措施,以达到最佳降噪效果、合理的经济效益。In this paper,the influence of different filtering branch filtering current on capacitor noise is analyzed by way of summarizing and analyzing the characteristic harmonic current parameters of typical filter branches of AC capacitors in HVDC projects in recent years.Through the analysis of the proportion of harmonic currents in the frequency bands of 100~500 Hz,550~1200 Hz and 1250~2500 Hz of each typical branch,it is found that the proportion of harmonic currents in the medium high frequency band of 550~1200 Hz,1250~2500 Hz and the number of accumulated harmonic currents are the main factors affecting the noise of capacitors.In the premise of the same harmonic current,the higher the capacitance of the capacitor unit,the lower the noise level.The theoretical analysis is fully confirmed by the actual measurement of noise of tested sample.This conclusion is of great significance for noise assessment of branch capacitors in the bidding stage and the early stage of product development.At the same time,different noise reduction measures can be adopted for different frequency bands of harmonic current to achieve the best noise reduction effect and reasonable economic benefits.

关 键 词：直流输电工程 交流电容器 典型支路 谐波电流 降噪措施 

分 类 号：TM53[电气工程—电器]