组合电力市场下水电优化调度研究

Study on the Optimal Operation of Hydropower under Combined Power Market

梯级水电站参与组合电力市场是提高发电收益、规避风险的有效途径。据此,建立了同时参与日合同市场和日前现货市场的梯级水电站优化调度模型。模型中考虑梯级水电站间的动态滞时,日前市场出清价格的不确定性和机组运行约束,使模型更加真实。为了提高求解效率,提出了几种线性化方法,将原始模型转化为基于场景的混合整数线性规划问题,并通过高效求解器进行求解。结果表明,该模型在保证梯级电站安全稳定运行的同时,保证了可观的发电效益。此外,与以往文献中的滞时计算相比,该模型得到的调度计划更加真实,计算效率更高。

It is an effective way for cascade hydropower stations to participate in the combinatorial electricity market to increase power generation profits and avoid risks. Based on this, the optimal operation model of cascade hydropower station is established, which participates in both daily contract electricity market and day-ahead electricity spot market. The model is more realistic by considering the dynamic water delay between cascade hydropower stations, the uncertainty of day-ahead market clearing price and the constraints of unit operation. In order to improve the efficiency of solution, several linearization methods are proposed to transform the original model into a scenario-based mixed-integer linear programming problem, which is solved by an efficient solver. The results show that the model not only ensures the stable operation of the cascade power station, but also ensures considerable power generation benefits. In addition, compared with the lag calculation in the previous literature, the scheduling plan obtained by this model is more realistic and more efficient.