基于广义短路比约束的光伏最大准入容量优化

光伏容量的增加会导致系统出现小干扰稳定问题,广义短路比指标可反映多光伏馈入系统的小干扰稳定性。基于此,提出了在广义短路比约束条件下,多光伏馈入交流网络中任意节点的最大准入容量优化方法。首先,建立多光伏馈入系统的小干扰稳定性分析模型;其次,以未降阶拓展阻抗矩阵的形式表达广义短路比,考虑光伏接入网络中任意节点的情况,建立基于广义短路比约束的光伏最大准入容量优化模型,并采用改进的粒子群算法进行模型的求解。最后,通过仿真验证了该方法的正确性。

Photovoltaic Maximum Admission Capacity Optimization Based on Generalized Short Circuit Ratio Constraint

The increase of photovoltaic capacity will lead to the small signal stability problem of the system. The generalized short circuit ratio index can be used to describe the small signal stability of the multi-photovoltaic feed-in system. Based on this, a maximum admission capacity optimization method for any node in the multi-photovoltaic feed-in AC network under the generalized short circuit ratio constraint is proposed. Firstly, the small signal stability analysis model of multi-photovoltaic feed-in system was established. Secondly, the generalized short circuit ratio was expressed in the form of unreduced extended impedance matrix. Considering the situation of any node in the photovoltaic access network, the maximum access capacity optimization model of photovoltaic based on generalized short circuit ratio constraint was established, and the improved particle swarm optimization algorithm was used to solve the model. Finally, the correctness of the method was verified by simulation.