Research On Dispatching Strategy Considering Large Scale Of Intermittent Energy Integration

With the vigorous development of intermittent generation technology, the problem of safe and economic operation and dispatch of power system containing intermittent energy becomes one of the important issues in the power system. The randomness and volatility of intermittent energy is the root cause of consumptive problem. It requires advanced forecasting techniques and control technology, also needs to develop a rational scheduling policy.This paper studies dispatch strategy including large-scale of interment power, under the environment of electricity market, it considers the wind and photovoltaic power forecasting error characteristics, and the comprehensive consideration of operation cost and reliability. This article has proposed active power dispatching models for different time scales to adapt large-scale intermittent generation connected to power grid.The main study of this article is as follows:Firstly, this paper reviews the current situation of active power dispatch containing large-scale wind and photovoltaic power both at home and abroad.Secondly, the forecasting techniques of wind and photovoltaic generation are summarized briefly, and the characteristics of wind and photovoltaic power forecasting errors are mainly presented.Thirdly, understanding the main structure of European electricity market, and based on which the day-ahead and intra-day dispatch models coordinated economic and reliability targets are established.Finally, the day-ahead and intraday dispatch models aforementioned are verified using the particle swarm optimization method. The influence of forecasting errors’ complementary and coordination between different time scales dispatch to the dispatch results is analysed. And through the analysis of cost and loss of load risk of dispatch results, it is proved that the dispatch strategy proposed in this paper is better.