Research On Peak-regulation Ancillary Service Market Mechanism Considering Wind Power Integration

With the rapid growth of wind power in the terminal energy consumption,the high penetration of wind power can reduce the carbon emission,but it will also challenge greatly the power balance.As an important means of power balance,the peak-regulation ancillary service should coordinate the interest relations between power sources considering their influence to power system,and conform to the trend of electricity market development as well.Therefore,it is very necessary to study and design a suitable peak-regulation ancillary service market mechanism considering the influence of wind power integration.Based on the practical experience of power balance and peak-regulation ancillary services,this paper redefines the peak-regulation ancillary services,and designs the two-phase market mechanism and trade organization process including the day-ahead peaking market and the intraday balancing market for Chinese electric power on the theory of power market.In design of the market,wind power prediction curve is divided into reliable and unreliable generation capacity according to the error distribution of wind power prediction.The reliable generation capacity is considered in day-ahead generation schedule,and since wind power cann’t peak,the peaking demand caused by wind power is provided by thermal power units in the day-ahead peaking market.The unbelievable generation capacity is not considered in day-ahead schedule,and is satisfied in the intraday balancing market by bilateral trading with thermal power according to the ultra short term wind power prediction.About the settlement mechanism,the fee of the day-ahead peaking market is apportioned between wind power and cogeneration power according to how much service each unit makes.And the share of wind power is paid by consumers for reducing the economic burdun of wind power.The intraday balancing market is designed based on bilateral market model to satisfy the incentive compatibilit,so thermal power units will bid the true cost.In addition,the mechanism of redistributing the market utility can encourage thermal power units to declare the real regulatory capacity.The income of wind power is guanranteed by the market mechanism above.Finally,the case study is proposed on Hebei grid data to prove the market mechanism is reasonable and effective.The mechanism can encourage the thermal power units to participate in market competition with economic method,so the potential of peaking is more explored.Through the market trading,the case of wind power curtailment reduces,and the interest distributi of thermal power and wind power get more equitable.