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Research on Optimal Operation of Electricity Market Under Energy-saving and Emission-reducting Environment

Author: LaiShaoYuan
Tutor: YangHongMing
School: Changsha University of Science and Technology
Course: Proceedings of the
Keywords: Energy-saving and Emission Reduction Electricity Market NCP Function Nash Equilibrium Energy-saving Generation Dispatch
CLC: F205
Type: Master's thesis
Year: 2010
Downloads: 152
Quote: 1
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Abstract


In order to improve the market competitiveness of the power industry, alleviate coal supply situation, promote the competition and cooperation relationship between the power and fuel enterprises, reduce environmental pollution, and in a way to the optimization disposition of power source, the paper researches on optimal operation of electricity market under energy-saving emission and reduction environment, focuses on optimization of electricity market with fuel supplies, and the generation dispatch problems under market operation environment.From the perspective of entire supply chain of electric power with fuel supply, the paper designs the overall structure of electricity market operation. On this basis, coupling the optimal decision-making of electricity market’s members, including fuel suppliers, power generators and independent system operator, the Nash equilibrium model of electricity market with fuel supplies is proposed with satisfying the constraints of power network. This model is a multi-layer optimization model, whose KKT system is a mixed nonlinear complementarity problem. By using nonlinear complementarity function to reformulate the KKT system into a set of algebraic equations, the Nash equilibrium of electricity market with fuel supplies is solved simply and fast. With 2 fuel suppliers, 2 power generators and 1 customer of electricity market as an example for numerical example, corresponding to different operational conditions of power network, the optimal decision schema of electricity market is analyzed.In order to better simulate ISO’s market clearing behavior under energy-saving emission and reduction environment, the paper researchs on the generation dispatch problems under operating environment, in the following three aspects:Firstly, the paper builts the generation dispatch evaluation index system, the system includes power consumption rate index, electricity-coal consumption index, fuel consumption index, water consumption index, SO2 emissions index and CO2 emissions index etc, the weight of each evaluation index is calculated by Fuzzy C-Means and the evaluation criteria of generation dispatch is given, in order to determine the order of energy generation scheduling of generating units.Secondly, satisfying the needs of network security and reliability, with the targets of the lowest coal consumption and the least emissions by power plant, the optimization model of energy-saving generation dispatch is designed. By using the nonlinear complementarity function to solve the model calculation. The generators’optimal power output can be gained, and the system’s active load can be reasonable distributed among the generating units.Thirdly, the paper selects 8 sets 300MW thermal power units of hunan grid for example.By using the generation dispatch evaluation index system and the optimization model of energy-saving generation dispatch, through calculating, the energy-saving generation dispatch priority and the optimal generation output of thermal power units can be obtained. Meanwhile, the power generation and pollutant emissions of thermal power units are compared before and after energy-saving generation dispatch, energy generation scheduling order with access to front of the thermal power generation increased more than rearward ones, and the sum of emissions from all thermal power units is decreased 6.28% from energy generation scheduling, it reflects the effect of energy-saving and emission reduction.

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