A novel evaluation method of the hosting capacity of multiple renewable energy stations accessed into a power system

Abstract

Along with the rapid development of renewable energy (RE), a critical issue regarding the adequate accommodation of RE should be given careful attention. This paper proposes a novel evaluation method of the hosting capacity of multiple renewable energy stations (MRES) accessed into the power system. Firstly, the node-system short-circuit ratio is specially defined, and the impacts of accommodating the MRES on the node voltage strength are considered. Then, the evaluation model is established by comprehensively considering the MRES hosting capacity and the node-system short-circuit ratio, and the system power and node voltage constraints are implemented. Furthermore, the improved particle swarm optimization (IPSO) algorithm is adopted to address the designed model-solving problem. Using MATLAB, the effectiveness of the proposed evaluation method is validated in the IEEE-39 node system with MRES. The computation result of the objective function proves the suggested IPSO algorithm outperforms the traditional PSO in finding the optimal solution for the MRES hosting capacity in the system. The theoretical and numerical analysis methods are consistent, and the findings show that the proposed approach can obtain the maximum allowable capacity of the MRES while ensuring the safe and stable operation of the system.