水电为主电网日前发电调度方法研究

A Day-Ahead Generation Dispatching Method for a Hydro-Dominated Power Grid

摘要: 针对水电为主电网短期调度问题，提出一种大规模电站群日前发电调度方法。基于电网预测负荷与实际负荷过程，采用相关分析法优选计划参考日，确定电站初始计划；考虑面临水位和来水等约束条件，进行水力校核以确定水库弃水或放空情况，并启发式调整发电量保证计划可行性；选择少量调节性能较好电站参与平衡计算，采用等负荷率方法优化水电站出力，实现系统电力平衡。通过实际仿真分析，本文方法能快速得到日前96点发电计划，满足以水电为主电网大规模电站群短期计划编制时效性和实用性要求。

Abstract: A day-ahead generation dispatching method for large-scale power plant group is proposed to solve short-term operation problems of a hydro-dominated power grid. Based on the forecasting load and the actual load profiles of the power grid, the correlation analysis method is used to select a reference date to determine initial generation schedules of each power plant. The current reservoir levels, inflow, and other constraints and conditions are considered to check the hydraulic connection and recognize reservoir spillage or empty states. A heuristic method is developed to adjust generation energy to assure the feasi-bility of day-ahead schedules. Some dispatchable hydropower plants are finally selected to meet load balance using an equally load-rate method. Finally, the application example shows that the proposed method can quickly obtain 96-point day-ahead power generation schedules, which can meet the timeliness and practicality requirements of short-term generation scheduling for large-scale power plants in a hydro-dominated power grid.