The inter-regional electricity market is instrumen-tal in enhancing the economic efficiency,reliability,and integra-tion of renewable generation within interconnected power sys-tems.As the market boundary expands,the ...The inter-regional electricity market is instrumen-tal in enhancing the economic efficiency,reliability,and integra-tion of renewable generation within interconnected power sys-tems.As the market boundary expands,the complexity and so-lution difficulties of market clearing increase rapidly.The pres-ence of hybrid alternating current(AC)/direct current(DC)in-terconnector networks further compounds challenges in model-ing trading paths and transmission tariffs.To address these is-sues,this paper proposes a path-aware_market-clearing(PAMC)model tailored for the inter-regional electricity market,which accommodates the hybrid AC/DC interconnector net-work.A variable aggregation strategy is proposed to reduce the problem scale while ensuring equivalent optimality.In addition,a novel redundancy elimination method is developed to expedite the solution of the market-clearing problem.This framework utilizes envelope approximations of residual demand curves to identify bidding blocks that will not affect the marginal price.Corresponding decision variables are then constrained to their bounds to remove redundant information.Comprehensive case studies across different power system scales validate the superi-ority of the proposed PAMC model in improving social welfare,and verify the effectiveness of the proposed redundancy elimina-tion method in accelerating the solution of the market-clearing problem.展开更多
基金This work was supported by the State Grid Corporation of China project“Research on Optimal Modeling and Fast Solution Technology of Inter-provincial Medium and Long Term Transactions Supporting Clearing with Inter-period Coupling”(No.5100-202255381A-2-0-ZN).
文摘The inter-regional electricity market is instrumen-tal in enhancing the economic efficiency,reliability,and integra-tion of renewable generation within interconnected power sys-tems.As the market boundary expands,the complexity and so-lution difficulties of market clearing increase rapidly.The pres-ence of hybrid alternating current(AC)/direct current(DC)in-terconnector networks further compounds challenges in model-ing trading paths and transmission tariffs.To address these is-sues,this paper proposes a path-aware_market-clearing(PAMC)model tailored for the inter-regional electricity market,which accommodates the hybrid AC/DC interconnector net-work.A variable aggregation strategy is proposed to reduce the problem scale while ensuring equivalent optimality.In addition,a novel redundancy elimination method is developed to expedite the solution of the market-clearing problem.This framework utilizes envelope approximations of residual demand curves to identify bidding blocks that will not affect the marginal price.Corresponding decision variables are then constrained to their bounds to remove redundant information.Comprehensive case studies across different power system scales validate the superi-ority of the proposed PAMC model in improving social welfare,and verify the effectiveness of the proposed redundancy elimina-tion method in accelerating the solution of the market-clearing problem.
