Key Laboratory of Guangxi Electric Power System Optimization and Energy-saving Technology (Guangxi University), Nanning 530004, China

At present, the key issue is how to determine the demand of energy storage in the distribution network with high photovoltaic penetration. However, it is complex to directly model for the distribution network which contains various power regulation methods, and the model is difficult to solve. Therefore, a practical gridding scenario analysis method is proposed. Firstly, the proposed method evenly divides every given operation condition within corresponding ranges, and then combines all given operation conditions to generate grid scenarios. Secondly, the technical indices of each scenario are calculated, and the relation diagrams of energy storage demand under different operation conditions are further obtained. As a result, the demand of energy storage is obtained by the relation diagram with given operation conditions and indices, which avoids the complex establishment and calculation of the optimization model. Finally, the modified IEEE 33-node distribution system is taken as an example and the process of determining the energy storage demand by the proposed method is demonstrated. The simulation results show the procedure, evaluation and analysis of proposed scheme, which verifies the effectiveness of the proposed method.