Research On Losses Allocation And Generation Bidding Price Modification In Electricity Market

The method of net loss allocation on the pool model is proposed on the basis of the power decomposition. According to the characteristics of this model, the net loss will be shared to the electrical sources. The choice of slack bus will not affect this method and the slack bus also be allocated the net loss. This paper defines the bilateral trade matrix on the bilateral model, and it is transformed to the current column vectors, these vectors then are introduced to the node voltage equations, deducing the distribution of net loss. It points out that bilateral trade is only a power trade, which will neither change the physical flow nor the net loss. Then the power sources -supplied distribution matrix is defined on the mixed-model, according to this matrix, this paper points out that the power trade is constrained by the physical flow. The transactions that disobey the restriction should be corrected,then the solutions are proposed, through modifying the bilateral trade matrix, the problem that bilateralpower trade is not coincident with the actual flow is solved. The corrected bilateral trade matrix could effectively share the net loss to the pool bargaining and bilateral bargaining. The mixed strategy could meet the requirements of market competitors, which will be the ultimate business model.The concept of variable costs flow is defined, it points out that the variable costs flow is consistent with the physical flow, which could be unified by this concept. Variable cost flow conservation principle is then proposed, it is that branch cost conservation principle and the nodes cost conservation principle. Based on the variable costs flow conservation principle, the node price model is constructed. The weighted average of all load-nodes price, which is provided by one of generations, could be as the quoted price of this generation corrected by net loss. Correcting quoted price is not only associated with the method of net loss allocation,but also associated with the corrected model. The model proposed by this paper fully considers the location of sources, the path of transmission and the change of variable cost caused by net loss. It can provide the right economic signals, which could effectively guide market participants to allocate the resources rationally.This paper proposes a strategy of price competition, which contains two parts, one is that the day-time bidding bases on the quoted price corrected by net loss, it determines how much electric energy should be on grid, and another is that the balance should base on bidding. Improved bidding strategy is fair to the competitors, there is no reserved capacity, it can effectively inhibit market force, and the market price fluctuations are less risk. This paper thinks that electric sources bidding should be done by power plants unit rather than generations unit, and the bidding should take into the generations whether work or not and their cost, that could stimulate the power plants to reduce costs and improve competitive position, that could make plants scheduling economically to get maximum of economic interests, it ultimately contributes to the interests of the whole community to maximize. In this way, one can simplify the bidding model; on the other hand enhance the competitive awareness of the plants and intensity in the market. Last, the day-time trading model is constructed, which is solved by improved method of Particle Swarm Optimization uniting the penalty function.