Optimization Study On Energy-saving And Emission Reduction Of Coal-fired Power Generation And Transmission

Coal combustion is the primary approach to generate electricity in China, where roughly80%of electric power is generated using coal. On the one hand electric power industry is the pillar of economy development;on the other hand coal combustion consumes a huge amount of primary energy and causes environmental pollution. Therefore, it is necessary to increase power generation efficiency and reduce related pollution in order to conserve energy and resources. Since the Chinese government is imposing more stringent regulations on energy saving and emission reduction, coal combustion power plants, which are the major consumers of primary energy, have to improve energy efficiency and further reduce emission. In certain regions of China, energy saving oriented dispatch is under test, which only uses coal consumption rate as the indicator of energy saving. But coal consumption rate itself doesn’t show the whole picture of energy saving and emission reduction of coal combustion power plants.This paper studies on evaluation system of energy-saving and emission reduction of generation and transmission of coal-fired power plant combined the characteristics of coal-fired generation and transmission. There are many factors which have impact to energy saving and emission reduction in coal combustion power generation. How to choose reasonable indicators, establish an appropriate model and select a proper optimization method determines the effectiveness of any evaluation of energy saving and emission reduction. This paper will do a comprehensive evaluation according to coal consumption for using power, pollution emission and water resource consumption based on theory analysis and enineering practice of coal-fired power generation and transmission. This paper will establish a integrated evaluation system of energy-saving and emission reduction of coal combustion power generation and transmission.The four indicators mentioned above are too many and ralated to easily show the overall performance of energy saving and emission reduction, therefore a mathematical method will be used to evaluate these indicators and obtain one index according to coal consumption for using power, pollution emission and water resource consumption, which is called comprehensive evaluation index of energy saving and emission reduction. The index directly shows the overall performance of energy saving and emission reduction of coal combustion power plants. The mathematical methods used in this paper are called factor analysis, particle swarm optimization and emergy analysis. The object is5units of600MW. The energy-saving and emission reduction index is calculated and ordered. The energy-saving and emission reduction dispatching will be achieved. The calculated results of three methods show that three method are reasonable. But the emergy analysis is better, it is the recommended method to optimize the energy saving and emission reduction of coal combustion power plant.In different load of grid, this paper provides two-stage calculation method for energy saving and emission reduction dispatching. The primary calculation station is seted in diapatching center, it will calculate the energy consumption and energy saving and emission reduction index of every power plant. This paper also provides a energy saving and emission reduction load optimization dispatching system based on Integrated Modular Modeling Software of the simulation system. It provides theoretical basis for energy saving and emission reduction oriented dispatch in power generation.This paper puts forward the concept of electricity coal consumption, it includes the line loss. It is a primary index of power plant. This concept is more reasonable to evaluate the energy saving and emission reduction of power plant.This paper studies the comparison of the transmission line loss of home and abroad. It puts forward a line loss share and compensation method of generation right trades.It is in favour of putting into practice of generation right trades.