Clearing And Bidding Strategy Of New Energy Participating In Auxiliary Service Of Net Load Reconfiguration

With the implementation of energy transformation policy,the proportion of renewable energy in the total energy is higher and higher,while the proportion of traditional energy is lower and lower.There is a risk of insufficient flexibility in the power system.Power system flexibility refers to the ability of power system flexibility resources to adjust the system power deviation caused by load,power fluctuation and uncertainty by adjusting means,considering different time scales and economic costs.On the one hand,due to the strong uncertainty and volatility of renewable energy,its own output will aggravate the flexibility problem of the system;on the other hand,due to the reduction of the proportion of traditional units which originally provided a lot of flexibility for the system,the regulation capacity will be weakened,and the flexibility problem of the system will become prominent.In this trend,the flexibility potential of renewable energy needs to be developed to deal with the lack of flexibility of power system.This paper proposes a set of methods to tap the flexibility potential of renewable energy in high proportion renewable energy system.First of all,this paper proposes a method to evaluate the flexibility of renewable energy,which takes the flexible resource adjustment amount and flexible resource adjustment coefficient as the indicators to evaluate the flexibility of renewable energy.Using these indicators can highlight the actual regulatory capacity of renewable energy as a flexible resource,ensure that it has a certain living space when providing flexible regulatory capacity,and prevent it from being denied the value of flexible regulation because of its poor fixed physical properties.This paper establishes a model to solve the flexibility index of renewable energy by running simulation method,analyzes the impact of renewable energy flexibility on system flexibility index,and compares the flexibility of not using renewable energy with that of using renewable energy,It is proved that renewable energy has flexibility value and its flexibility potential is worth developing.In addition,this evaluation method intuitively shows the regulatory attribute of renewable energy,renewable energy can obtain benefits by participating in some regulatory behaviors based on this attribute,and renewable energy with poor regulatory performance will spontaneously improve its own flexible regulatory ability,so as to obtain more benefits.Secondly,in order to fully exploit the flexible adjustment space of renewable energy,a new auxiliary service,net load reconfiguration service,is established,which is specially proposed for the power system with high proportion of renewable energy.This paper establishes the clearing model of ancillary services and electric energy market,and compares the profits of renewable energy not participating in the net load restructuring market and participating in the net load restructuring service market by clearing.The clearing results show that tapping the flexibility potential of renewable energy can promote renewable energy to actively participate in the flexible regulation service from the perspective of market,so as to effectively enhance the flexibility of the system with high proportion of renewable energy.Finally,in order to enable renewable energy to participate in the net load reconfiguration market smoothly and obtain more benefits,a bidding strategy for renewable energy to participate in the net load reconfiguration service is proposed.The optimal decision-making of renewable energy is modeled by using the non cooperative static game Nash equilibrium model.At the same time,the clearing model is used for feedback,and the renewable energy only participates in the day ahead electric energy The effectiveness of the strategy is proved by the analysis of three scenarios: market,day ahead energy net load reconfiguration service joint market and day ahead market.It provides a way for renewable energy to obtain greater benefits,so as to enhance the enthusiasm of renewable energy to provide flexible regulatory services.