摘要
提出一种适用于规划网架的线损理论评估方法,对规划网架进行简化,假设每回馈线只包含主干线和一级分支线,并且各段长度一致和负荷均匀分布。推导出规划网架的线路损耗和配变负载损耗的等值电阻,利用馈线容量比值估算馈线最大电流。配变空载损耗与配变型号有关,统计各种型号配变台数即可得出配变空载损耗。最后推导出配电网损耗计算公式。算例表明所提算法具有较高的精度。
A theoretical estimation method of distribution network loss is proposed for planning grid.To simplify the planning grid,it is assumed that,each feeder only contains main trunk and first-level branches with same length and well-distributed load.The equivalent resistance is derived for distribution transformer load loss and line loss of planning grid,and the maximum current is calculated for each feeder according to their capacity ratios.As the transformer no-load loss is related to its type,the transformer load loss is calculated according to the quantity of each type.The calculation formula of distribution network loss is derived.Calculation example shows its high accuracy.
出处
《电力自动化设备》
EI
CSCD
北大核心
2011年第7期17-20,共4页
Electric Power Automation Equipment
关键词
配电网
等值电阻法
最大电流
电力线
电力损耗
评估
electric power distribution
equivalent resistance method
maximum current
electric lines
electric losses
estimation
