电力市场环境下输电网混合性规划模型

Along with the development and perfection of Chinese power market and the new technology, the power grid planning, especially the transmission system planning, is facing new problems and challenges. For the above situation, this paper proposes a hybrid criterion planning model for medium-term and long-term multi-scenario transmission system planning based on the deterministic criterion and the probabilistic criterion under the electricity market. The model combines the constraints and parameters of both deterministic and probabilistic criterions, including flexible constraints, investment cost, power supply, demand bids, time cost, probability of contingencies, value of customer reliability (VCR), loss of load expectation (LOLE), and expected energy not served (EENS). Meanwhile, a number of scenarios are defined to simulate the load level of the power system. The transmission system planning problem is transformed into a mixed-integer linear programming problem to seek the optimal planning scheme by using the DC-power flow equations and the commercial solver CPLEX. Through the comparison between the proposed model and the conventional planning models, test results of actual cases of study in the power grid show the flexibility, the effectiveness and the economy of the model proposed. © 2016 Automation of Electric Power Systems Press.