Energy-Saving Generation Dispatch Stratege Based On More Precise Emission Function

Increasing global energy consumption makes low-carbon development, energy-saving and emission reduction become important measures to face world’s energy supply risk and environmental damage. Though china gains a rapid economic growth and great achievements in every field, but also pays enormous costs of resources consumption and environmental damage. The contradiction between former and later is becoming increasingly acute, therefore energy-saving and emission-reduction have become an important strategy for sustainable development in China. In china’s power industry, thermal power generating units accounted for more than77%of the total units, thermal generating capacity accounted for more than80%of the total generating capacity, power industry consumes42%of the country’s total consumption of primary energy and the SO2emission from power industry is also over50%of the national emission. Consequently, there is significant potential for energy conservation and emission reduction in the electricity industry. In order to promote the power industry energy conservation and emission reduction, China carried out energy-saving generation dispatching (energy-saving generation dispatching, ESGD) pilot work in August2007.Based on implementing energy-saving generation dispatching in China, this paper introduced research of energy-saving generation dispatching’s background and significance, described its domestic and overseas current research status, and made preliminary summary and analysis about the study on the emission function and energy-saving generation diapatch. Then, this paper gave the definition of emission function and raised the proposition to refining emission functions aiming at its low accuracy as well as the non-effectiveness of real time monitoring data from power plants at this stage. The paper analysed the main pollutants of power plants and factors affecting their quantative. Next, it presented the Gibbs free energy minimum principle. It built up chemical combustion simulation module using the large commonly used processes simulation software-Aspen Plus, which tried to reflecct coal combustion process best for coal-fired power plants. All data of air pollutant emissions from coal-firedplants are got by this way. Finally, this paper fitted a more accurate thermal power plant main emissions function through SPSS software, and multiple linear regression methods,In addition, this paper analysed the non-neglect of network losses in energy-saving generation dispatch. It slao described the methodology calculating the network loss. It Analysed the environmental costs of coal-fired power plants using the principle of negative externality of Economics, as well as environmental costs must be as one of the key costs of the energy-saving generation dispatching. Then, it established a energy-saving generation dispatching model under the respective constraints, comprehensively taking coal consumption cost, environmental costs and network loss, based on the emission function refined in this paper. Moreover, it verified the effectiveness and practicality of energy-saving generation dispatching model and the emission function developed in this paper using the power system consists of26nodes and6plants on Matlab7.1.