基于牵引负荷负序功率潮流计算及电能计量方式研究  被引量:6

Study on negative sequence power flow calculation and electric energy metering mode of traction load

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作  者:高雨翔 蔡奇新 徐文林 Gao Yuxiang;Cai Qixin;Xu Wenlin(Marketing Service Center,State Grid Jiangsu Electric Power Co.,Ltd.,Nanjing 210019,China;State Grid Hunan Electric Power Co.,Ltd.,Changsha 410000,China)

机构地区:[1]国网江苏省电力有限公司营销服务中心,南京210019 [2]国网湖南省电力有限公司,长沙410000

出  处:《电测与仪表》2023年第1期193-200,共8页Electrical Measurement & Instrumentation

基  金:国网重点研发计划资助项目(2020YFF0426410)。

摘  要:针对不对称的牵引负荷会引起负序功率潮流,直接影响电能计量结果的可靠性和准确性,文章提出了一种牵引负荷负序功率潮流计算及电能计量的调整方法。分析了牵引负荷负序功率分布情况,将分析结果结合牵引负荷的相关性,采用Copula理论构建牵引负荷负序功率潮流分析模型,计算牵引负荷正序功率的潮流结果以及分布和流向;依据计算结果分析牵引负荷负序功率潮流对电能计量的影响,提出基于功率因数理论电能计量调整方案。测试结果表明,文中方法具备良好的负序功率潮流计算效果,与实际结果之间的最大差值均低于0.0006,功率因数的取值为0.7时,能够合理、可靠地完成电能计量,保证计量结果的准确性。Asymmetric traction load will cause negative sequence power flow and directly affect the reliability and accuracy of electric energy metering results.Therefore,this paper studies the calculation of traction load negative sequence power flow and the adjustment method of electric energy metering.It analyzes the negative sequence power distribution of the traction load,combining the analysis results with the correlation of the traction load,adopts Copula theory to construct a traction load negative sequence power flow analysis model,and calculates the power flow results,distribution and flow direction of the positive sequence power of the traction load.According to the calculation results,the influence of negative sequence power flow of traction load on electric energy metering is analyzed,and an electric energy metering adjustment scheme based on power factor theory is proposed.Finally,the test results show that the method proposed in this paper has a good calculation effect of negative sequence power flow,and the maximum difference between the actual results is less than 0.0006,and the value of the power factor is 0.7,which can complete the electric energy metering reasonably and reliably,and ensure the accuracy of the metering result.

关 键 词:牵引负荷 负序功率 潮流计算 电能计量方式 相关性 功率因数 

分 类 号:TM721[电气工程—电力系统及自动化]

 

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