Fixed Cost Allocation of Distribution Network based on Risk induced by New Energy Access

The installed capacity of wind power station and photovoltaic power station increases rapidly worldwide, which not only alleviates the energy crisis but also brings great challenges to the distribution network. This paper proposes a fixed cost allocation method for distribution network considering new energy access risk. Firstly, the state model and output probability model of each component of distribution network are established. Based on the non-sequential Monte Carlo simulation method, the probabilistic power flow calculation is carried out, and the node voltage-limited risk and active power-limited risk are obtained as the risk indexes of distribution network. The entropy weight method is used to calculate the weight of each risk index, and the comprehensive risk evaluation index is obtained. Finally, a model of equitable distribution of fixed cost among all responsible parties is established. Taking IEEE 14-bus system as an example, the risks and costs caused by different subjects of new energy are analyzed, so as to realize effective risk measurement and fair cost distribution to a greater extent.