目前许多电站负荷分配需要使用机组效率曲线，但是由于机组效率曲线是通过模型机得来，在实际运行中难免会有误差。
At present, in order to dispatch load, lots of hydropower stations need to use the unit efficiency curve, which more or less has some errors because it is obtained by model test.
采用了ZIP负荷模型来计算系统的PV曲线，并与采用恒功率负荷模型时的结果进行了比较，得出了一些有实际意义的结论。
ZIP load model is used to calculate the PV curves of the power system, and some meaningful conclusions are drawn by comparing its result with which constant power load model is used.
通过对华东某地市电网日负荷96 点曲线的预测结果显示，该方法效果较好，日预测均方根误差在1.78%以内，能较好地满足实际电力系统的负荷预测要求。
The forecasting results of a city in east China showed that, the MSE forecasting error of 96 points daily load is only about 1.78%. The method can satisfy the request of real power system well.
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