Research On Capacity Mechanisms Of Electricity Market Based On Equilibrium Model

The global market-oriented reform of the power industry and the transition to clean energy have brought about profound changes in the management,planning,and operation of power systems.As an important part of ensuring the adequacy of the system’s power generation capacity,it is also facing new changes and challenges.In the market environment,the adequacy of power generation capacity is no longer just an engineering and technical issue,but also an economic and social issue.Various power markets around the world have made some attempts to use price signals to guide long-term investment in power generation and ensure the adequacy of power generation capacity.However,whether these capacity guarantee mechanisms can effectively deal with the real problems of the electricity market and whether they can provide electricity generation investment guidance economically and efficiently in the high-occupancy and high-renewable energy market is still uncertain.For this reason,this paper has conducted a systematic study on the performance of the existing capacity guarantee mechanism in oligopolistic competition markets and high renewable market share,and has achieved certain research results:First,the theoretical model and practical application of power generation capacity planning methods during the planned power period and the early stages of power market reform were discussed.The results show that these methods are no longer applicable to the current power market.After that,the capacity mechanisms proposed by various countries in the world to deal with this problem were analyzed,and three main research subjects were selected.Secondly,in the existing market,the power oligarch will exercise market power in the market and influence the market mechanism to reasonably guide long-term power generation investment.In order to study whether the introduction of the capacity mechanism can improve this phenomenon.This paper builds a three-phase equilibrium model of the electricity market oriented to the competition between the capacity mechanism and the Cournot oligopoly.It was found that the introduction of the capacity mechanism would change the way in which oligopolies exercise market power.At the same time,the increasing proportion of renewable energy also brings challenges to the effective operation of capacity mechanism,in order to study the impact of higher renewable energy ratio on capacity mechanism in the future.In this paper,a non cooperative game equilibrium model considering the capacity mechanism of electricity market,the flexibility of system peak load regulation and the green card transaction of renewable energy is constructed,and the mixed complementarity problem is solved by using the Lagrange relaxation condition.The simulation results show that the introduction of capacity mechanism will lead to the transfer of the main revenue sources of renewable energy in various markets.With the increasing share of renewable power generation,in order to ensure sufficient and reliable capacity,the total installed capacity of the society and the total electricity cost of users will increase accordingly.Finally,the research work of this paper is summarized briefly,and some further research directions in the power market capacity mechanism are proposed.