采用负荷电量计算低压配电台区理论线损的牛拉法

刘庭磊; 王韶; 张知; 朱姜峰

引用本文:	刘庭磊,王韶,张知,等.采用负荷电量计算低压配电台区理论线损的牛拉法[J].电力系统保护与控制,2015,43(19):143-148.
	LIU Tinglei,WANG Shao,ZHANG Zhi,et al.Newton-Raphson method for theoretical line loss calculation of low-voltage distribution transformer district by using the load electrical energy[J].Power System Protection and Control,2015,43(19):143-148

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采用负荷电量计算低压配电台区理论线损的牛拉法
刘庭磊¹, 王韶², 张知², 朱姜峰³
1.国网重庆市电力公司南岸供电分公司，重庆 400060;2.输配电装备及系统安全与新技术国家重点实验室 (重庆大学)，重庆 400044;3.国网邯郸供电分公司，河北邯郸 056035

摘要:

为计算低压配电台区理论线损和利用远程自动抄表系统提高管理线损水平，提出一种采用负荷电量计算低压配电台区理论线损的牛拉法。该方法基于等值电阻法和用户电能表实抄电量，通过引入线路负荷曲线形状系数与平均负荷电流的关系和三相负荷不平衡线损修正系数建立以台区理论线损为变量的数学模型。给出了运用牛拉法求解该模型的实现过程。算例分析表明，提出的方法不仅能够计算低压配电台区的理论线损，而且能够为识别不明线损提供信息。

关键词: 低压配电台区理论线损等值电阻法牛拉法线损管理

DOI：10.7667/j.issn.1674-3415.2015.19.024

分类号:

基金项目:

Newton-Raphson method for theoretical line loss calculation of low-voltage distribution transformer district by using the load electrical energy

LIU Tinglei¹, WANG Shao², ZHANG Zhi², ZHU Jiangfeng³

1.Nan'an Electric Power Supply Subcompany, State Grid Chongqing Electric Power Company, Chongqing 400060, China;2.State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China;3.State Grid Handan Electric Power Company, Handan 056035, China

Abstract:

In order to calculate the theoretical line loss of low-voltage distribution transformer district and improve the line loss management level by using automatic meter reading system, a Newton-Raphson method to calculate the theoretical line loss of low-voltage distribution transformer district by adopting the load electrical energy is proposed. On the basis of the equivalent resistance method and the electrical energy acquired from the watt-hour meters of customers, the mathematical model of regarding theoretical line loss of transformer district as a variable is created. The model introduces relationship between load shape coefficients and the average load current, and the line loss modified coefficient of unbalanced three-phase load. The procedure of the Newton-Raphson method to solve the model is presented. Case analyses show that the proposed method can not only calculate the theoretical line loss of low-voltage distribution transformer district, but also provide the information to identify unknown line loss.

Key words: low-voltage distribution transformer district theoretical line loss equivalent resistance method Newton-Raphson method line loss management

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