Optimization And Design Of Power System In Ulaanbaatar

One of the important problems in the energy field of Mongolia is the lack of sufficient energy supply in the peak load stage,with the peak load reaching about 1200 m W.The current lack of energy is supplemented by buying from Russia,which is very expensive.When the load is low,the surplus power is sold to Russia at a very low price.And most of the power plants in Mongolia are coal power plants with relatively inflexible control and slow response.Therefore,it is unreasonable to shut down the turbine at low load in terms of economy and technology.Therefore,it is problematic to provide energy for peak load utilization of coal power plants.Meanwhile,the haze in Ulaanbaatar,the capital of Mongolia,is very serious.A large amount of CO2 emissions from coal-fired power plants are very harmful to the health of urban people.Moreover,the water resources in Ulaanbaatar are limited,so coal-fired power plants use a lot of water to have a negative impact on the water resources in Ulaanbaatar.In order to improve people’s health and environment,it is necessary to reduce the use of coal power plants.It is an important way to solve these problems to establish a comprehensive energy system based on clean energy according to the fact that such areas have sufficient light resources,small population and low power demand.In the long run,in order to realize the sustainable development of the system and ensure the stability and economy of the system,it is necessary to carry out the research on the reasonable allocation of the equipment capacity of the comprehensive energy system.In the existing research,there are few researches on the capacity allocation optimization of large-scale integrated energy system in Ulaanbaatar region.This paper puts forward the research method of capacity allocation of this kind of problem based on the research experience of previous literature and the actual engineering projects in Ulaanbaatar region,and there are many deficiencies,which provides a thought for the follow-up research.The specific work is summarized as follows:(1)The output characteristics and hydrogen energy storage conversion process of wind turbine,photovoltaic module and coal-fired generator are studied.And choose a common and simple system operation control strategy.The mathematical model of the main equipment of the system is built as the basis of the capacity configuration model.(2)The output characteristics of integrated energy system are analyzed.According to the stability of the system,the classical power supply deficit rate constraints and the system power supply deficit rate constraints are designed.According to the operation characteristics of the main power supply,the hydrogen energy storage capacity constraint is designed.According to the resource utilization index,the energy waste rate constraint is designed.The minimum NPV of main input equipment cost is taken as the objective function to achieve the stability and economic index of the system.(3)Based on the example of Ulaanbaatar,the typical day in winter is selected as the calculation basis of the model.The actual wind,light resources and power load are analyzed,which provides data basis for capacity allocation calculation.Based on the above research,this paper designs the capacity allocation model of integrated energy system in Ulaanbaatar,and uses particle swarm optimization algorithm to program and calculate.Through the verification of the calculation results,it shows that the optimization method of power system capacity allocation proposed in this paper is effective.Finally,the integrated energy system can reduce large amount of pollutant emissions.