The Theory And Analysis Of Transmission Operation

Electricity Market is the inevitable reformation of the power utility to keep up with the economic development. It is the historical reformation, which will bring to immense profits and inject activity to the power system. Transmission open access, which acts as the most popular transaction form based on the principles of publicity, justice and impartiality, will be one of the marks of the electricity market. Correspondingly, the three principles mainly reflect on the transmission pricing. A scientific and securable transmission cost scheme will promote the development and benefit of the transmission grid, which is significant to the healthy electrical market. Therefore, it is safely to say that transmission pricing as an important constitution of the electrical market price scheme is the important factor to affect the development of the open transmission.This article deals on the theory of the transmission transaction, especially on the analysis of the method of the transmission pricing. Because the transmission pricing is based mainly on the recovery of the fixed cost, the article investigates the cost of transmission transaction and analyses comprehensively the composition of the transmission costs and several popular marginal pricing methods and allocation methods. By discussing how can choice the appropriate marginal pricing method, a method in according to the domestic environment is developed.In the electricity market, spot price can reflect the marginal operational cost varied with the time and get the optimum social profits. This article analyses the composition of the spot price, and discusses the theory of the spot price, which setthe bases to the transmission pricing.Based on the existed methods and the theory of the transmission pricing and spot pricing, a new transmission pricing method based on the decomposition of the transmission costs is proposed. A linear programming model is proposed to minimize the generation cost and the operation cost of every transmission line is got by calculating the lambda prices corresponding to the constrains. The fixed cost of transmission lines is shared by the consumers based on their installed transformer capacities and the operation cost of transmission lines is distributed among consumers based on capacity-use by electricity-tracing method. The method is provided to decompose the transmission costs into capacity costs and operation costs that correspond to the loads connection and usage to avoid the irrational allocation of the transmission costs among the consumers and to take the fully advantages of the transmission resources.An example is given to demonstrate the validity of the proposed method by the comprehensive results. Some conclusions are finally given by analysis.