Study On The Theory, Mathematical Model And Application Of Transmission Expansion Investment And Management Optimization After The Separation Of Grid And Generation

With the constant progress of science and technology, breaking the monopolyand introducing the market competition has already become the world trend in mostutilities including power industry and our country has begun the deregulation of thepower industry. At the end of 2002, the power industry of our country recombinantsinto five generation companies and two grid companies-the north and the south. Thepresent mission of reform is to carry out bidding to the net step by step and set up theregional electric market of China. But after the power industry of Chinarecombination, the operation practice exposes some problem which deserves attentionand need to study and solve. One of the important problem is in the condition ofseparating the generation and the transmission and the generation and the gridcompany becoming two independent economic entity at present, how to plan powersource,grid and the demand side correspond to guarantee transmission expansion planand investment can maximize the whole social benefit. Under these kinds ofbackground, this paper study on the theory, mathematical model and application oftransmission expansion investment and management optimization after the separationof grid and generation, formed the systemic theoretical system, and demonstratedsome research results.This text researched the problems of the existing distribution method of gridtransmission cost, provided the method of analyzing and confirming the benefit oftransmission expansion investment, and analyzed the cost/benefit of different item oftransmission expansion investment. Through analysis, we think that the price methodsof the transmission should adopt the long-term marginal cost method which canencourage grid investment. These methods can optimization the transmissionexpansion.This paper researched and analyzed the impact on cost and profit of generationbecause of the transmission expand, and the interconnected impact on benefit ofgeneration, then analyzed the optimization transfer power supply of the generation inthe given interconnect level, and illuminated an example. In addition, this paperanalyzed the profit change of the transmission companies before and aftertransmission expansion, provided a model of confirming the capacity of transferpower supply after optimize the whole power system. Also, this paper analyzed theresponse of the customers (the demand side) to the transmission expansion.This paper studied on the market mechanism design of the transmission capacityrestrict management. Start with controlling and managing the cost of the transmissionrestrict, analyzed and studied the management mechanism and methods in thenon-market mechanism and the market mechanism separately, formed correlativemathematical model of the electric power trade. Also simulative analyzed under thecondition of transmission restrict how the power market should run, and provided thecorresponding scheme of the electric power trade mode.This paper provided one method to analysis and evaluate the optimization of thetransmission investment and reliability ,detruded the cost function which can reflecthow the cost change along with the transmission restrict and the transmission restrictadditional cost change, set up and validated the mathematical model which analysesthe optimization reliability of the grid in the whole year. In addition, this paper havealso studied the setting-up problem of the market mechanism of financing of thetransmission expansion and provided the corresponding scheme.This paper researched the coordination and planning issue of the power source andgrid after separate the generation and transmission, provided the mathematical modelwhich solves this issue, and carry on the suggestion on how to set the organizationand operation issue to guarantee to plan coordinative the customer of the powersource and the grid in the power market.Result of this paper indicates that through studying on the theory, mathematicalmodel and application of transmission expansion investment and managementoptimization after the separation of grid and generation, coordinate generation andgrid planning and the operation management can guarantee security of the powersystem operation ,and at the same time ,the economy aspect can achieve optimization,especially that through market mechanism and the government macro adjustments andcontrols, the regional grids can safely,economically construct and operation. So theissue which this paper research on is the important issue on the whole nationaleconomic security develop and the living standards of the people. Also this issue hasimportant theoretical research meaning and actual using value to the electric systemreform.