电压约束的台区分布式光伏最大接入容量研究

Research on the Maximum Access Capacity of Distributed Photovoltaic in Substation Area with Voltage Constraint

提出了一种以电压为约束条件的台区配电线路可消纳光伏容量快速评估方法。解决了台区配电线路的电压重过载问题。该方法通过分析光伏发电接入时线路电压的变化并建立其最大容量的评估模型,该模型的主要参数为灵敏度系数,通过求出各个线路的灵敏度系数,再利用多元线性回归法得出最大容量对各个线路参数的影响,通过对线路是否重过载的判定一定程度上实现了对台区可接入最大光伏的预测。最后对湖溪塔元公变台区、湖溪中格田台区进行实验验证了该模型的有效性。

This paper proposes a fast assessment method of the photovoltaic capacity that can be absorbed by the distribution lines in the station area with voltage as the constraint condition.The problem of voltage overload of the distribution line in the station area is solved.This method analyzes the change of line voltage when photovoltaic power is connected and establishes an evaluation model of its maximum capacity.The main parameter of this model is the sensitivity coefficient.The sensitivity coefficient of each line parameter is calculated,and then the influence of maximum capacity on each line parameter is obtained by using multiple linear regression method.The influence of capacity on the parameters of each line can be predicted to a certain extent by judging whether the line is heavily overloaded or not.Finally,experiments on the Huxi Tower Yuangong Substation and the Huxi Zhonggetian Platform verify the effectiveness of the proposed model.