考虑静态安全约束的分布式电源准入容量计算

Penetration Capacity Calculation for Distributed Generation Considering Static Security Constraints

分布式电源的接入给配电网带来了一系列影响,在大量分布式电源亟待并网运行的趋势下,研究一个系统能够承受的分布式电源容量具有重要意义。该文分析了分布式电源对配电网电压分布和线路潮流的影响以及分布式电源并网位置和功率因数对准入容量的影响,从电力系统静态安全约束的角度出发,建立了计算分布式电源准入容量的数学模型。对于多个分布式电源的情况,提出了准入容量计算的双层优化模型和相应的优化求解算法,并通过对实际配电系统进行分析,验证了该方法的正确性和有效性。

Network-connected distributed generation （DG） brings a series of impacts on distribution network, so it is of importance to study the bearable DG capacity of a distribution system under the tendency that a lot of DGs urgently need to be connected. Based on the analysis of impacts of DG on voltage profile and power flow of distribution network as well as the impacts of the power factor and position, where the DG is grid-connected, on penetration capacity, a mathematical model of penetration capacity of DG is built when static security constraints of power grid are considered. Under the condition of multi-DGs, a bi-layer optimization model to calculate penetration capacity and corresponding optimized solution algorithm are proposed. Through the case study on actual distribution system the correctness and effectiveness of the proposed method are verified.