Studies On The Multi-party Electricity Trading Based On The Game-theoretic Approach

At present,the electric power system reform is being placed in imposing array under the guidance of national policy and the change of world economic environment.And New Entities(NEs)have sprung up and access to the electricity market and participate in the electricity trading under this background.How the NEs parallel in the distribution network system scientifically and reasonably in the environment of electric power reformation? How will the NEs affect the electric power market transaction? How will the power grid company position itself? All these problems will be the topics of current research which need to analyse urgently.First of all,a new concept of optimizing the equipment selection of new energy connected to the grid is proposed to cope with an ever-increasing number of the trade subject in electricity market.In illusion to the problems such as excessive investment,voltage drop and the ascending loss of active power which is resulted from differences in cost,revenue and capacity between various kinds of new energy.A mathematical model is proposed.Simulating analysis conducted with the instance of IEEE-30 node system verifies the rationality and validity of this method.To clarify,the study of NEs connected to the power grid provides experimental basis of analyzing the role of NEs in the decision of electricity multilateral trading.Secondly,traditional and new power loss models are proposed respectively.Then a multi-party electricity trading model is proposed based on a non-cooperated static game model which consists of grid company,NEs and customers and considers location,benefits and power loss.A seven NEs case is studied and its Nash Equilibrium result is obtained with serializing coevolutionary GA-PSO algorithm.Meanwhile this paper explained the physical meaning of Nash Equilibrium which is verified by a heuristic method.The proposed model shows its feasibility and universality.Besides,the model and conclusions could provide theoretical reference for the multi-party electricity trading.