The Optimization Strategy For Zibo City’s Power System Based On The Analysis Of Levying Emission Taxes

With the increase of electricity demand for the whole society,the thermal power is facing serious pressure of emission reduction as a major source of atmospheric pollutants.The “ten measures of air pollution control” introduced by the State Council would cause more stringent emission caps and restrict the development of thermal power enterprises.In addition,the renewable power generation would develop slowly due to the high cost and technical problems.Therefore,in this study,the power system planning would be applied to power structure adjustment and the promotion of energy conservation and emission reduction.The research selected Zibo City as a case study,which combined an inexact optimization method with regional power system model.The research also set up scenarios of levying emission taxes on the power system for analyzing and comparing the difference between emission caps and total emission quantity.In this study,an inexact two-stage chance-constrained programming could handle the uncertainties in the system.The objectives of the model include: 1)to minimize the system cost as the objective function;2)to set up the resource quantity,the power supply and demand balance,and the emission caps as constraints refer to the relevant national policies and standards;and 3)to optimize power generation quantity,purchased electricity,the total amount of CO2 and air pollutant emission.In order to take the national standard of emission as reference,the research combined the chance-constrained programming with emission caps,of which the effects on the system were analyzed.In addition,the corresponding scenarios for levying taxes on the emission of air pollutants and CO2 from power system were set up,respectively.The research selected Zibo City as a case study,which would provide theoretical support and reference for decision-makers.The results showed that: 1)with the increasing probability of violating system constraints,the optimized thermal power generation quantity would increase,while the total system cost would decrease;2)the optimized power generation quantity of wind power and solar power would reach the upper bound under different scenarios.Although the biomass and garbage power varied slightly,the renewable power generation quantity would still achieve the goals of 10% total electricity consumption.Moreover,the purchased electricity would be the complementary power form for the power system;and 3)the emission caps of SO2,NOx and PM under the default probability of 0 in scenario 1 would be the best among all scenarios.It denotes that the current standard implemented by Zibo would obtain better results,and the results of total cost in scenarios 2 and 3 would increase significantly compared to ones in scenario 1.Therefore,based on the case study of Zibo City,levying emission taxes on power system maybe unnecessary.In this study,the current standard of emission cap,the pressure of emission reduction for power system and corresponding effects were analyzed,which could provide theoretical basis for the sustainable development of power system.The emission tax of CO2 and air pollutants would be effective to control emission.The analysis of levying tax on power system would provide theoretical reference for the new direction of energy saving and emission reduction,which has good practical significance.