多级协同模式下华中电网大规模水电站群跨网调峰调度研究

根据华中区域大规模电站群跨省电力输送运行实际,针对水电站群优化调度需兼顾多电网调峰需求、电站出力计划编制复杂问题,提出了一种多级协同模式(MLCM)下大规模水电站群跨网调峰调度方法。以各受端省级电网余荷均方差最小为目标建立电站群联合跨网调峰调度模型,通过流域梯级电站群层级排序获得电站优化次序,简化电站间复杂耦合关系,将约束处理耦合至电站出力网间二次分配过程中,逐步迭代调整各受电网受电计划,获得满足多电网调峰需求的电站出力计划与电网受电过程。所提方法通过华中区域三葛梯级、清江梯级、沅水梯级水电站群调度模拟得到验证,应用结果显示电站出力计划在兼顾多电网调峰需求的同时充分发挥了水电站群联合调峰容量效益,具有工程实用价值。

Research on Cross-Grid Peak-shaving Dispatching of Large-scale Hydropower Stations in Central China Power Grid under Multi-level Cooperative Mode

According to the actual operation of large-scale hydropower stations in Central China Power Grid, considering the need of multi-grid peak-shaving and the complex problem of daily dispatching plan making, a cross-grid peak-shaving dispatching method for large-scale hydropower stations under multi-level cooperative mode is proposed. A cooperative inter-grid peak-shaving dispatching model of hydropower stations is established to minimize the mean variance of residual load in each provincial power grid. The optimal sequence of power stations is obtained by hierarchical sequencing of cascade hydropower stations in the river basin, which simplifies the complex coupling relationship among hydropower stations, and the initial output process of them is obtained by initial load distribution. Furthermore, the generation plans of each power grid are adjusted iteratively to meet the peak load regulation requirements of multiple power grids and the generation process of power grids are obtained by this means. The proposed method is validated by the dispatching simulation of Three Gorges Cascade, Qingjiang Cascade and Yuanshui Cascade hydropower stations in Central China. The application results show that the daily dispatching plan considers the load characteristics of multi-grid, while giving full play to the capacity benefits of combined peak regulation of hydropower stations, and has practical engineering value.