| At present,China’s power market is in the "two track operation" stage of gradual transition from planned economy to market economy.In the transitional period,thermal power units still have a large proportion of base trading electricity,and the fixed base electricity price approved by the government regardless of the generation period is implemented.In recent years,with the acceleration of China’s power marketization process,especially the deepening of the spot market reform,thermal power units fully participate in the power market competition,and the proportion of bidding power is gradually increasing,so it is particularly important for thermal power units to adopt flexible bidding strategies for different load conditions in the market.In the spot market,the decomposition mode and base price level of different base electricity will have a great impact on the unit settlement income.In the transition stage of "plan+market",it is very important to realize the efficient coordination of planned base electricity and price with market link.At the same time,in recent years,the proportion of renewable energy in China’s power system has increased rapidly,and the state has taken many measures to ensure the priority consumption of renewable energy.Therefore,the actual curve faced by thermal power units participating in the competition will not be the original total load curve,but the net load curve after deducting the consumption of renewable energy.This feature is in the high proportion of renewable energy power Especially in the force system.Therefore,this paper mainly studies the base peak valley price mechanism based on the net load curve.In order to study the reasonable and efficient price and settlement mechanism applicable to the development of the spot market,this paper proposes a base peak valley price model of power generation enterprises based on the net load curve.Firstly,this paper analyzes the influence of different base price forms and power decomposition methods on the unit settlement income in the spot market;at the same time,considering the development trend of China’s future high proportion of renewable energy power system,multi state probability distribution is used to quantitatively describe the output characteristics of renewable energy,and on this basis,a peak and valley time division method based on the net load curve is proposed;Combined with the time division results of each season,a joint calculation model of base peak valley electricity price of power generation enterprises is established.Taking a high proportion of renewable energy grid connected area in China as the research object,by comparing the income of thermal power units in different base price forms and base power decomposition ways,it is verified that the power price calculation model and method can make the power generation enterprises participate in the spot market competition,and the base power has little impact on the profits of thermal power enterprises,which is helpful to improve the power generation in the spot market Enterprise income settlement plays a positive role. |
