基于动态检测技术的配电网输电线网损评估  

Transmission line loss assessment of distribution network based on Dynamic Detection Technology

作　　者：李泽群 LI Zequn(Kaili Power SupplyBureau of Guizhou Power Grid Co.,Ltd.,Kaili 556000 Guizhou,Chin)

机构地区：[1]贵州电网有限责任公司凯里供电局,贵州凯里556000

出　　处：《电力大数据》2018年第7期74-79,共6页Power Systems and Big Data

摘　　要：通过直接估计输电线路电阻实现配电网电线网损评估功能,存在难以精准把握的问题,因而提出了将配电网输电线最高允许温度转化为有功功率损耗的限制,从而确立输电线短期热定值的方法。以输电线路热平衡方程中环境参量作为状态变量,根据输电线有功功率损耗与电阻、温度的耦合关系,推导出输电线有功功率损耗变化的微分方程,以此建立系统的量测方程;同时,考虑热平衡方程式参数变化的迟缓性,建立状态变量空间表达式;继而,依据输电线有功功率损耗变化率,采用卡尔曼滤波的方法,实现对状态变量的估计。由此,完成了配电网电线网损评估的功能,为配电网输电线短期最大电流运行方式是否可行提供了解决依据。以贵州省凯里某地区220 k V电网输电线的实测数据为例,验证了该方法的可行性与有效性。Through direct estimation of transmission line resistance wire to realize the distribution network loss evaluation function,is difficult to accurately grasp the problem,it is proposed that the distribution network transmission line,the maximum allowable temperature into active power loss limit,thus establishing the method of transmission wire short thermal value.The environmental parameters of the heat balance equation of transmission line as state variables,according to the transmission wire coupling relationship between active power loss and resistance,temperature,differential equation of transmission line power loss change is derived,in order to establish the measurement equation;at the same time,considering the slow change of thermal balance equation parameters,establishing the state variable then,on the basis of space expression;transmission line active power loss rate,using the method of kalman filter is used to estimate the state variables.Thus,the function of distribution network wire loss assessment is completed,which provides the basis for the feasibility of short-term maximum current operation mode of distribution network power transmission line.The feasibility and effectiveness of the proposed method are verified by the measured data of the transmission line of 220 kV distribution network in an area of Guizhou,Kaili.

关 键 词：配电网 输电线 网损评估 有功功率损耗 动态热定值 

分 类 号：TM75[电气工程—电力系统及自动化]