基于回路阻抗阵的低压配电网运行状态评估方法
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摘要
为解决低压配电网运行状态评估问题,提出了一种基于回路阻抗的低压配电网运行状态评估方法。建立了低压配电网回路阻抗模型,提出了基于智能电表电压与电流变化速率的回路阻抗近似计算方法;建立了需求侧实时电压数据阵和需求侧实时电流数据阵分别记录配电变压器所属的所有智能电表不同时刻的电压与电流量测信息,并通过两矩阵生成了需求侧实时回路阻抗数据阵,以记录配电变压器所属的所有智能电表上游回路的阻抗变化情况;最后基于回路阻抗数据阵详细讨论了配电网需求侧运行状态的评估方法。实例分析验证了本文所提方法的可行性,可满足现场工程实际需求。
In order to solve the problem of low-voltage distribution network operation state evaluation,an evaluation method for low voltage distribution operation state based on loop resistance matrix is proposed. The loop resistance model of low-voltage distribution network was established,and the approximate calculation method of loop resistance based on the change rate of voltage and current of smart meter was proposed. The demand-side real-time voltage data matrix and demand-side real-time current data matrix were established to record all the belonging of the distribution transformer. The voltage and current measurement information of the smart meter at different times,and the real-time loop resistance data matrix of the demand side are generated through the two matrices to record the resistance change of the upstream circuit of all the smart meters to which the distribution transformer belongs; finally,based on the circuit resistance data matrix,the evaluation method of the operation state of low-voltage distribution network is discussed. The example analysis verifies the feasibility of the proposed method and can meet the actual needs of field engineering.
In order to solve the problem of low-voltage distribution network operation state evaluation,an evaluation method for low voltage distribution operation state based on loop resistance matrix is proposed. The loop resistance model of low-voltage distribution network was established,and the approximate calculation method of loop resistance based on the change rate of voltage and current of smart meter was proposed. The demand-side real-time voltage data matrix and demand-side real-time current data matrix were established to record all the belonging of the distribution transformer. The voltage and current measurement information of the smart meter at different times,and the real-time loop resistance data matrix of the demand side are generated through the two matrices to record the resistance change of the upstream circuit of all the smart meters to which the distribution transformer belongs; finally,based on the circuit resistance data matrix,the evaluation method of the operation state of low-voltage distribution network is discussed. The example analysis verifies the feasibility of the proposed method and can meet the actual needs of field engineering.
引文
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[2]樊唯钦,张伟,李勇钢,等.基于改进人体舒适度指数的微电网超短期负荷预测[J].广东电力,2017,30(4):137-142.
[3]周名煜,谢宁,王承民.基于灵敏度和灰色关联度的配电网运行方式变权重评估方法[J].电力系统保护与控制,2017,45(13):130-137.
[4]张伟,吕睿博,阎有朋.基于不平衡电容注入的配电网小电流接地故障定位方法[J].智慧电力,2017,45(10):66-71.
[5]张伟.基于轨迹阵的配电网故障仿真培训评价方法[J].广东电力,2018,31(1):113-118.
[6]陈发广,周步祥,曾澜钰.基于多信息融合的变压器运行状态评估模型[J].电力系统及其自动化学报,2013,25(4):140-144.
[7]王福忠,邵淑敏.基于模糊综合评价法的变压器运行状态评估[J].计算机仿真,2015,32(6):141-145.
[8]李彦斌,李赟.基于可信性理论的高压断路器运行状态评估[J].华东电力,2014,42(1):66-70.
[9]冷华,童莹,李欣然,等。配电网运行状态综合评估方法研究[J].电力系统保护与控制,2017,45(1):53-59.
[10]吴昊.输电系统运行风险评估方法[J].电力系统及其自动化学报,2017,29(12):139-145.
[11]张伟,冷永杰,闫剑锋,等.基于改进雷达图的配电网综合状态评估实用方法[J].电力系统保护与控制,2013,41(12):117-122.
[12]谢成,曹张洁,温典,等.基于实时运行数据挖掘的配电变压器状态评估[J].浙江电力,2017,36(8):1-5.
[13]王钰楠,杨镜非,何也帅,等.基于复杂网络理论的主动配电网多级运行风险快速评估[J].电力系统自动化,2016,40(14):65-71.
[14]周毅,杨镜非,王钰楠.基于可信性理论的主动配电网运行风险动态评估[J].电气自动化,2016,38(3):47-56.
[15]张心洁,葛少云,刘洪,等.智能配电网综合评估体系与方法[J].电网技术,2014,38(1):3642-3648.