Study Of Transmission Losses Allocation Based On Generation Rights Trade

Generation rights trade will change the power flow of the grid as well as losses, andthen make impact on the transmission service costs of the grid. If the transaction increasesthe grid operating cost, then the grid will lose enthusiasm. Therefore how to take suchinfluence into account effectively and make the corresponding compensation to powergrid are the problems to be solved. Based on referring to the relevant literature, this paperis to study the influences on transmission network losses resulting from generation rightstrade, to develop a losses allocation scheme among participants fairly and reasonablywhich makes the corresponding compensation on the grid to effectively promote thegeneration rights trade.Firstly, this paper studies the background, theoretical and practical significance ofgeneration rights trade and losses allocation. This paper makes analysis on the status ofgeneration rights trade and clusters the domestic and foreign transmission losses allocationmethods.Secondly, this paper studies the losses for the section network. A cross-section gridnetwork is equivalent to a linear circuit. Generators and loads are modelled as currentsources and the relationship between current sources and branch power flow and losses isthen established based on the superposition principle. Based on the first step, therelationship between the quantities of generation rights trade and the variations in losses ofthe network is established. The power losses can be divided into two parts by the equationderivation: the self-coupling power losses and the mutual coupling power losses. Theself-coupling power losses are caused by the current source itself, and do not have to beallocated; the mutual coupling power losses result from the coupling action between twocurrent sources and need to be assigned in order to further clarify the responsibilities ofnetwork losses.Thirdly, losses allocation can be seen as a cooperative game problem that investigatesthe allocation of surplus obtained by agents of a coalition through cooperation. TheAumann-Shapley is used to allocate the losses with and without generation rights trade. It can prevent over-recovery of losses, reduce the computational effort, and provide fair andreasonable allocation with good economic coherence.Finally，illustrative numerical results with the IEEE9-bus and IEEE30-bus testsystem are presented to prove the validity.