基于最大流模型的配电网中分布式电源吸纳能力研究

Survey on Distributed Generation Accommodation Ability of Distribution Network Using Maximal Flow Model

针对配电网中分布式电源吸纳能力问题,提出了一种新的数学模型。该模型在传统的节点电压方程中引入了支路电流方程,建立了包含节点电压和支路电流的非衰减配电网络流模型。该模型的求解被分解为两个子问题,一个是以网络流最大为目标的优化问题,另一个则由一个线性方程组表示,通过交替迭代计算进行求解。某城市电网实际系统算例表明,模型求解的复杂度和高维度都得到明显改善,求解变得更加容易。

A novel mathematical model was presented to address the issue of distributed generation accommodation ability in distribution network. This model introduced branch current equations into the traditional node voltage equations so that the non-expendable network flow mathematical model of hybrid power network node voltages and branch currents was established. Solving this model was divided into two sub-problems. One is an optimization problem with the network flow maximization as its objective function. The other is represented by a linear system of equations whose solution can be obtained by alternating iterations. An actual city power grid example shows that the complexity and high dimension of the model solution are significantly improved. Thus,the solving process becomes easier.