Analysis Method of Capacity Margin of Distribution Lines Based on Load Data

Abstract:
In order to solve the problem of reducing the margin of distributed photovoltaic grid-connected lines, a method for analyzing the line capacity margin of distribution network based on load data is proposed. First, this paper describes the connectivity between the nodes of the power distribution system by identifying the line topology. It provides the basis for the judgment of line distribution and transformation. According to the load data and line flow, the difference between the maximum transmission power and the actual transmission power is calculated as the capacity margin of the node. This paper makes full use of the capacity of the original distribution line to avoid capacity redundancy. The test results show that the design method can effectively reduce the power loss, improve the capacity margin, and help to improve the stability of the power grid operation.