An Active Power Scheduling of Distribution Network by Considering the Stratification of Power Quality for Renewable Energy and Shiftable Load

In this paper, a simple method of stratification of power quality and its scheduling strategy for renewable energy are proposed for scheduling active power in distribution network with the access of large-scale renewable energy. Taking the setting of shiftable load, such as charging power of electric vehicle, as example, the active power scheduling optimization model is built with such objectives as comprehensive operation and management cost including storage battery, electric vehicle rental and power generating cost, dissatisfaction of shiftable load and abandoned wind power output. In this model, pollutant discharged quantity is set as an auxiliary index to select the optimal case, so operation economy, environmental benefit and social impact of staggering charging are comprehensively considered. On the base of the NSGA-II algorithm, the correctness and effectiveness of the proposed method is demonstrated by case simulation and comparison. The proposed power stratification method of renewable resources is simple and effective, which can provide the reference and data support to the actual dispatching operation of distribution network.