福建电网水电比重较大，但受调节库容影响，汛期多弃水，枯水期容量闲置，设备利用率不高；而华东电网的水电比重低，调峰手段严重缺乏。本文就华东、福建联网的效益进行了探讨，指出充分利用福建水电的调峰作用；可取得提高水能利用、减少电网备用容量、为福建采用大机组准备了条件等明显效益。 Fujian Power Grid has a large proportion of hydropower, but it is affected by the regulation of storage capacity. Flood water is mostly discarded in the flood season, and the capacity is idle in the dry season, and the equipment utilization rate is not high. However, the proportion of hydropower in East China Power Grid is low and there is a serious lack of peak regulation. In this paper, the benefits of networking in East China and Fujian are discussed. It is pointed out that full utilization of hydropower peak regulation in Fujian can be achieved, such as improving water energy utilization, reducing standby capacity of power grid, and preparing conditions for large units in Fujian.