Owing to continuously increasing penetration rate of distributed sources in distribution network and the inverse proportional relationship between prediction accuracy of source-load and time scale,volatility of source-load has become an important factor constraining safe and economical operation of distribution network.In view of this,the present work proposed a multi-time-scale reactive power optimization method that combines day-ahead and intra-day considerations.The method works by utilizing Fisher's optimal segmentation to divide operation periods of discrete reactive power compensation devices,and by performing real-time adjustments to reactive power output of continuous compensation devices in intra-day periods to cope with the volatility of source-load.The effectiveness of the proposed optimization strategy was validated by conducting experiments on the IEEE 33 system.
distribution networkreactive power optimizationmulti-time scaleperiod division
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