基于ETAP仿真的直接空冷机组厂用电谐波分析与抑制研究  

Harmonic Analysis and Restrain of Direct Air-cooled Auxiliary Power System Based on the ETAP Simulation

作　　者：刘丽影[1] 侯淑莲[1] 顾学宏[1] 

机构地区：[1]东北电力设计院,吉林长春130021

出　　处：《电力科学与工程》2012年第2期18-25,共8页Electric Power Science and Engineering

摘　　要：直接空冷机组厂用电系统采用大量低压变频器,变频器产生的谐波在发电厂厂用电系统中流动,产生谐波危害。以1 000MW机组为例,提出4个空冷岛低压厂用电原理接线方案,对整个发电厂系统进行ETAP(ETAP Power Station)谐波分析仿真。仿真数据表明,变频器产生的谐波对空冷岛低压厂用电系统有较大影响,而高压厂用电系统及更高级电压等级的谐波都能满足国家标准;仿真数据还表明,方案1的空冷岛低压厂用电原则接线方案更合理。最后,根据ETAP仿真结果,提出一系列抑制空冷岛低压变频器产生的谐波影响措施。The adoption of many !ow-vohage inverters to the auxiliary-power system of the direct-air-cooled plant results in that a lot of harmonics, which do harm to the power system, are produced in the auxiliary-power system. In this paper, four auxiliary-power connection schemes of the low-voltage side in the air-cooled island are proposed, and the stimulations and analysis of harmonics in the auxiliary-power system are made using ETAP （ ETAP Power Station）. The stimulation results show that the harmonics produced by the inverters have a great impact on the aux- iliary-power system of the low-voltage side in the air-cooled island and the harmonies in the auxiliary-power system of the high-voltage side meet the requirements of the national standard. The stimulation results also show that the first scheme of auxiliary-power connection is better. The measures of restraining the harmful influence of the har- monics on the auxiliary-power system of the low-voltage side in the air-cooled island are put forward.

关 键 词：直接空冷 变频器 谐波 ETAP软件 

分 类 号：TM75[电气工程—电力系统及自动化]