城市电网设计中电缆通道负载流量优化控制

发布时间：2018-01-07 21:37

本文关键词：城市电网设计中电缆通道负载流量优化控制　出处：《计算机仿真》2017年10期 　论文类型：期刊论文

【摘要】：在城市电网设计中电缆通道负载流量优化控制,能够有效提高电力电缆的利用率和安全可靠性。对电缆通道负载流量的控制,需要设定电缆中电流的初值,给出电缆绝缘层的最高温度,完成对电缆通道负载流量的优化控制,传统方法获取敷设环境温度,计算出土壤温度和载流量的关系,但忽略了给出电缆绝缘层的最高温度,导致控制精度偏低。提出基于等效导热系数的电缆通道负载流量优化控制方法。上述方法先通过IEC60287计算单芯电缆载流量,给出电缆温度场的优化控制方程差分形式,得到边界上温度函数,设定电缆中电流的初值,给出了修正的载流量,利用Fourier定律给出电缆绝缘层的最高温度,以此为依据完成对电缆通道负载流量优化控制。实验结果表明,所提方法优化控制精度高,大幅度提升了电力电缆的输电能力。
[Abstract]:The cable in the city power grid design channel load flow control, can effectively improve the utilization rate and the safety and reliability of power cable. The load flow control of cable channel, cable in the current need for setting initial value, the highest temperature of cable insulation layer is given, completes the optimization control of the electric cable channel load flow, the traditional method for laying environment the calculated temperature, soil temperature and current relationship, but ignores the highest temperature insulation layer are cable, the precision of control is low. The cable channel equivalent heat transfer coefficient based on load optimization control method of flow. The method first calculated by IEC60287 single core cable ampacity, given cable temperature field optimization control equation form, get the temperature function on the boundary, to set the initial value of current in the cable ampacity, gives the correction, for cable insulation using Fourier law The maximum temperature of the layer is used to optimize the control of the load flow of the cable channel based on this. The experimental results show that the proposed method has high control accuracy and greatly improves the transmission capacity of the power cable.

【作者单位】：国网上海市电力公司电力科学研究院;国网上海市电力公司检修公司;
【分类号】：TM727.2
【正文快照】： 1引言当下,在城市化脚步逐渐加快的同时,一些大型城市电网的中心城区多存在电缆通道资源紧张、用电负荷大等供电隐患,依据电缆增容来巩固城市供电压力是解决这一隐患的有效途径[1~3]。在国内,相关的专家提出利用光纤测温和电流等数据,实时优化控制电缆的动态载流量,为电力系统

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