When deciding VQ limits of VQC, the forecasting load of every period of time is defined as a fuzzy number, which turned exact one by a certain believe level to calculate the range of reactive control.

• 在确定VQC上下限时，将每一时段的预测负荷定义为模糊数，在一定的置信水平下精确化，可计算出对应的无功调节范围。