考虑分时电价的智能配电系统可靠性评估

In the paper, the model and algorithm to evaluate the reliability of smart distribution grids are proposed. An integrated model is proposed to describe the time-of-use(TOU) pricing, which contains three steps: the division of TOU periods, the access of the electricity price elasticity and the optimization of the price for each period. In the optimization, the constraint conditions consider operation and power market constraints while the objective function aims to minimize load range, maximize power suppliers' income or minimize customers' cost. On the basis of conventional evaluation method, an improved sequential Monte Carlo simulation algorithm is proposed, which can evaluate the reliability of distribution systems considering TOU pricing and distribution generation (DG) by modifying the TOU pricing affected loads introducing islanding operation analysis. In the method, real-time load is used to accurately evaluate the load loss. The validity of above model and the method are studied through numerical tests on modified RBTS test system. As the result shows, the degree of impact of TOU pricing and DG on distribution system reliability is determined by the cooperation of pricing strategies and operation of DGs.