基于牵引负荷负序功率潮流计算及电能计量方式研究

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和准确性,本文提出了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,并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0.000 6,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。

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

Asymmetric traction load will cause negative sequence power flow and directly affect the reliability of electric energy measurement results. Therefore, this paper studies the calculation of traction load negative sequence power flow and the adjustment method of electric energy measurement. First, analyze the negative sequence power distribution of the traction load, combine the analysis results with the correlation of the traction load, use Copula theory to construct a traction load negative sequence power flow analysis model, and calculate 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 measurement is analyzed, and an electric energy measurement adjustment scheme based on power factor theory is proposed. The test results show that the method in this paper has a good calculation effect of negative sequence power flow, and the calculation result of negative sequence power flow is highly reliable, and the maximum difference between the actual results is less than 0.0006, and the value of the power factor is 0.7 , Can complete the electric energy measurement reasonably and reliably, and ensure the accuracy of the measurement result.