配电网负荷接入最大合理供电半径简化计算

Simplified Calculation of Maximum Reasonable Supply Radius for Distribution Network Load Access

针对业扩负荷接入点选择主观性强及大范围馈线级时序潮流校验暂时难以施行的现状,提出了一种配电网负荷接入最大合理供电半径的简化计算方法,旨在求取最大半径以指导负荷接入点选取。引入了负荷矩、等效节点和等效供电半径等概念以简化计算,基于电压降计算给出了求解最大半径的思路及过程。在10 kV线路实例中应用所提方法进行最大合理供电半径的计算,所提方法适用于各种计算情形,结果可指导负荷接入点选取。

In view of the fact that the selection of load access points for business expansion is highly subjective and the large-scale feed-er-level time-series power flow verification is temporarily difficult to implement,a simplified calculation method for the maximum reason-able supply radius of distribution network load access is proposed,aiming at obtaining the maximum radius to guide the selection of load access points.The paper introduces the concept of load moment,equivalent node and equivalent supply radius to simplify the calculation,and gives out the idea and process of solving the maximum radius based on the voltage drop calculation.The proposed method is applied to the calculation of the maximum reasonable supply radius in a 10 kV line example,and it verifies that this method is suitable for various cal-culation situations and its results can guide the selection of load access points.