Calculation Method of Limit Access Capacity of Photovoltaic Source on the Basis of Chance-constrained Programming in Rural Distribution Network

To avoid the calculation of limit access capacity of photovoltaic (PV) source is incorrect due to the consideration of the occurrence of a small probability event, this paper proposes a method to calculate the limit access capacity of photovoltaic (PV) source based on the chance onstraints of voltage deviation on the basis of considering the randomness of PV power and load. Maximizing limit access capacity of PV is regarded as the goal, the voltage deviation is regarded as the chance constrained condition, the calculation model of limit access capacity of PV is established. Then, using the LHS and Newton-Raphson to calculate the probabilistic load flow (PLF), the statistical properties of node voltage are obtained. Calculation results of PLF and quantum genetic algorithm are used to solve the model. By comparing the results of optimization with heuristic method, the correctness and validity of the proposed method are verified.