Study Of The Optimized Scheduling Of Power Grid With Intermittent Energy And Its Distributed Framework

In recent years, the exploitation, controlling and application technologies ofintermittent energy are developing rapidly. With the increase of environmental problemsand the exhaustion of conventional fossil fuel, new energy is becoming a significantdirection of power system development. But the power output of intermittent energy israndom and full of volatility, and hard to predict accurately. At present there lacks thesupporting technology for generation scheduling decision and coordinated dispatch withwind power integration. The traditional generation is facing a new challenge. So withinthe security constraints, how to realize the coordinated dispatching optimized problem,considering the output characteristics of intermittent energy, becomes an important issuethat must be solved.In this paper, the optimized dispatching model with wind power is established. Basedon the historical data of wind power, aimed at the uncertainty and volatility of wind poweroutput, the reserve capacity allocation and prediction error probabilistic assessment iscombined, and the price compensation model of wind power is put forward. At the sametime, the pollution characteristic of thermal power units is discussed and the pricecompensation model is also set up. Guaranteeing the system security, a more reasonableand sustainable price model by statistic significance of power system dispatch with windpower is put forward. Example shows that this model can effectively reflect the impacts ofdifferent economic policy factors.At the same time, the distributed coordinating algorithm suitable for the existinghierarchical dispatching system is researched. In this article, adopting the geographicdivision principle, considering the actual circumstance of power grid, the system isdivided, and several subareas are formed. By the employment of Lagrangian relaxationand Auxiliary problem principle, the distributed coordinating dispatching framework isobtained.At last, the practical utilization of this distributed framework is exploited, mainlyfrom two aspects. The first one is the coordination of balance buses in subareas, and thesecond one is aimed at the actual dispatching model, discussing the utilization under the circumstance with tie line constrains. And the effectiveness of this exploitation is verified.