广东省粤北地区电网谐波的计算与分析

HARMONICS CALCULATION AND ANALYSIS OF YUEBEI AREA NETWORK IN GUANGDONG PROVINCE

以广东粤北地区电网中电气化铁路和钢铁厂电弧炉谐波计算分析为例 ,介绍了电力系统谐波程序 (CHP)的计算方法和计算结果。CHP程序是从加拿大 CYME公司引进的。利用 CHP程序进行工程谐波计算步骤包括 :1收集分析供电网的参数和非线性负荷的运行方式、运行工况、谐波含量及背景谐波等 ;2建立网络数据文件 NDF、谐波电流源文件TBL、基波电压文件 FVI等 ;3在供电网中指定公共连接点和感兴趣的观测点 ,然后计算分析并按照国标检查各公共连接点和监测点的谐波是否达标 ;如果超标 ,则提出相应的措施 ,重新计算 ,检验改进措施的效果。

Taking both electric trailer and arc furnace of Yuebei area network in Guangdong province for example, the harmonics calculation software CHP and calculation results are presented in this paper. The CHP harmonic program of power system is imported from CYME Co. of Canada. The application of CHP includes the following steps. (1) Collecting and analyzing the parameters of the supply pool, the operation state of non linear load and the background harmonic, etc. (2) Forming the network data files (NDF), the harmonic current resource files (TBL) and foundation voltage files (FVI). (3) Designating the common connection points and interested survey points in supply pool. Then carrying out the calculation and analysis. The result of calculation and analysis should be contrasted to the critical value in the Harmonic Guide of China GB/T 14549 93. If the contrasted result exceeds the specified value in the Guide, the improvement measures should be put forward and the calculation, analysis and result examination should be carried out again on the basis of the measures. The two calculation examples in this paper show all the above mentioned steps.