Elastic clearing model of electricity spot market

The output of new energy has great uncertainty. With the development trend of new energy gradually participating in the spot power market, the safe dispatching space of power system under the traditional power market mechanism is gradually compressed, mainly due to the rigid declaration and system constraints of market members. At the same time, the traditional unit commitment scheme mainly relies on the power grid operators to designate unit startup and shutdown and undertake deep peak shaving and other auxiliary services. This mechanism is prone to the problem of scheduling fairness. For this reason, this paper first establishes the electricity spot market clearing model considering the constraints of price elasticity and system elasticity. Under this mechanism, market members, in addition to reporting conventional quotations and physical constraints to trading institutions, report to trading institutions the scope of relaxation of their constraints and their compensation quotations according to their own actual operation, fully tap the potential of unit constraint elasticity by using incentive mechanisms, and ensure the fairness and justice of dispatching by actively participating in the way of market members, so as to improve the safety and economy of power grid operation. Then it designs the spot market settlement mechanism with the participation of new energy; Study the way, object and proportion of unbalanced cost allocation, and realize reasonable rewards and punishments for market members' deviant behaviors. Finally, it is demonstrated that this mechanism can effectively stimulate the ability of market members to declare and relax constraints, and find a better unit combination scheme than the traditional mechanism in a wider feasible range, which will be conducive to promoting the consumption of new energy and improving the overall social welfare.