摘要
为充分挖掘电力电缆裕量,可根据需要对现行电缆实施动态增容。电缆导体温度是动态增容的重要依据,基于有限元法计算电缆导体温度,根据电缆导体允许工作温度(90℃)确定允许增容时间。计算单线增容允许增容时间,绘制应急负荷-允许增容时间曲线,供电力调度参考。双线增容时有双线同时增容、单线轮流增容两种方案可供选择,计算两种方案所能提供的增容时间,确定最优增容方案。结果表明,双线同时增容能提供更长的增容时间,为最优增容方案。
In order to make full use of power cable allowance, it is necessary to add transmission capacity of the running cable according to need dynamically. Cable conductor temperature is the important evidence for dy- namic capacity increase. This paper calculates conductor temperature based on finite element and determines permitted capacity increase time on the basis of the permitted conductor temperature （90 ~C ） of the cable. For single-circuit capacity increase, permitted capacity increase time is calculated and the emergency load- permitted capacity increase time curve is drawn, which can give a reference for power cable operation and man- agement. For double-circuit capacity increase, there are double-circuit simultaneous capacity increase and sin- gle-circuit rotational capacity increase two schemes to choose from. The capacity increase time of two schemes is calculated and then the optimal capacity increase scheme is determined. The results show that double-circuit simultaneous capacity increase can provide longer capacity increase time which is the optimal capacity increase scheme.
出处
《东北电力大学学报》
2016年第5期7-12,共6页
Journal of Northeast Electric Power University
关键词
有限元
允许增容时间
单线增容
双线增容
Finite element
Permitted capacity increase time
Single-circuit capacity increase
Double-circuitcapacity increase
