Research On Transactive Energy Market Based On Distribution Locational Marginal Price

With the reform and evolution of power market system thoughout the world,more market vitality will be released in power market.In competitive power market,the introduction of price signal into the distribution network will release the potential of distributed generation and demand-side response program,and further improve the flexibility of distribution system.In recent years,with the rapid development and application of distributed generation,the operation and trading of distributed generation has become a research focus.Transactive energy market has gradually developed into a novel electricity market.In transactive energy market,distributed generations,electricity sales companies,and users can participate in market for trading.Addressing at the electricity price of distribution system and transactive energy market,this thesis proposes a transactive energy market based on distribution locational marginal price.The main contents of this thesis are as follows:(1)This thesis introduces Lagrangian relaxation theory,game theory and Nash bargaining theory.The mathematical model of Lagrangian duality,sub-gradient method and local sensitivity are stated.Moreover,this thesis reveals the economic implication of shadow price and introduces basic concept of game theory,classification of games and mathematical model of Nash bargaining theory,laying a theoretical foundation for the subsequent chapters.(2)Based on linearized power flow model,this thesis induces sensitivity analysis and proposes global and local compensation term.Considering coupled effect of active and reactive power in distribution system,a novel model of distribution locational marginal price is proposed in this thesis.Distribution system operator considers system operation constraints,optimizes economic dispatch,and centrally clears the distribution locational marginal price.Distribution locational marginal price includes active power price and reactive power price,that both can be decomposed into five components,i.e.energy price,loss price caused by nodal injected active power,loss price caused by nodal injected reactive power,congestion price and voltage support price.(3)This thesis proposes a transactive energy market based on energy hub,and the distribution system operator centrally clears distribution locational marginal price.In addition to trading with distribution system operator,energy hubs can freely conduct point-to-point energy trading among energy hubs at other nodes,using cooperative games to jointly optimize their operation modes and trading decisions,and reduce their total operation cost.In this case,total operation cost can be reduced,and profit in trading can be distributed in a fair way.By Nash bargaining theory,the trading model of energy hub is decomposed into two sub-problems,namely,operation mode optimization problem and trading payment bargaining problem.Finally,the modified IEEE 33-bus distribution system is used to verify the rationality and effectiveness of this model.Through experimental simulation,the results show that with energy trading,total operation cost of energy hubs is reduced by 12.62%.