The Research About Price Of Electric Power Market

With the development of economic, the imbalance between the supply and the requirement of electric power happened in 2003. The load took the new high records in succession at whole country, every big electric power networks run at excess load, the urgent state about cutting off the power supply in countrywide areas existed. The reason of the phenomenon are many, the phenomenon reflects the reform about electric power general adopting the market principle is stare d in the face. As the supporting point of the power market, the price of electricity plays an important role in power market. As the result, the reform about electric price should be a significant problem. The reform about electric price focuses on the sales price to power network and reactive pricing at present.The paper introduced the conception of electricpower market, narrated some basic theory about the price of electricity, including the function and essence of electric price, the principle of establishing electric price, the historical development of electric price theory, the theory and method of modern economics electric price. The paper also introduced the classifications of electric price and the status in quo of electric price reform nowadays in our country.There are three kinds of method of calculating basic electric price, includes: marginal cost method, account cost method, and spot price theory. The marginal cost method is adopted in the paper.To the sales price to power network, the paper analyzed and compared the three pricing mode, which is single-part pricing tariff, two-part pricing tariff and eigenvalues pricing. The paper gave the pricing models, after comparative advantage and shortage, the author chose the two-part pricing tariff based on marginal cost method to calculate the sales price to power network in primary power market. The paper gave the theory, algorithmic method, and computational modeling based on marginal cost method of two-part pricing tariff. With the computational modeling, the author compiled program, and calculated the example of an electric plant in Taiyuan, certified the correctness of the computationalmodeling.The paper emphasize on the problem of reactive pricing in power market. As the important part of auxiliary services, the reactive price existed with the holding up and development of spot theory. In power market, power generation, power transmission, and power supply should be independent economic entities. The price of electricity should balance the tripartite profit. At the same time, the control of the electric voltage will be the outstanding problem. So the reactive pricing in power market is vital to the run and management of whole system.The author adopts the method that separating the active power and reactive power, establishing the reactive price lonely. And bring forward a model that taking the generating cost and capital costs of reactive-load compensation equipment as objective function, supported by spot price theory. The method of the model is punitive function method of optimization theory. The author compiled program by the model, and certified the correctness of the model by calculated the local area network in Taiyuan, achieved the practical significance.