综合能源系统中,不同能源之间的相互转换可提高能源的利用效率,是区域综合能源系统规划的重要研究课题。就综合能源系统的结构而言,研究了冷热电联供系统(Combined Cooling Heat and Power,CCHP)、电转气装置(Power to Gas,P2G)、储气...综合能源系统中,不同能源之间的相互转换可提高能源的利用效率,是区域综合能源系统规划的重要研究课题。就综合能源系统的结构而言,研究了冷热电联供系统(Combined Cooling Heat and Power,CCHP)、电转气装置(Power to Gas,P2G)、储气装置、热电联产机组(CHP)和太阳能光伏发电机组等设备互补协同作用下的成本。讨论了不同配置系统的经济性和可行性,建立了一系列模型,并且用粒子群算法进行求解。算例结果表明,配置蓄冷和储热模型在能源互联网系统中可以增加收益,同时能源的相互转化在一定程度上可以提高能源利用率,减少环境污染。展开更多
为提高总体用能效率,构建综合能源系统是能源领域的重要发展趋势之一。在能源互联网中,综合需求响应利用电、热等不同形式能源间的耦合互补关系,在需求侧进行能源转换设备的协同优化,激发综合能源网络的灵活性,有利于提升能源利用效率,...为提高总体用能效率,构建综合能源系统是能源领域的重要发展趋势之一。在能源互联网中,综合需求响应利用电、热等不同形式能源间的耦合互补关系,在需求侧进行能源转换设备的协同优化,激发综合能源网络的灵活性,有利于提升能源利用效率,降低供能和用能成本。为此,提出一种计及电-热综合需求侧响应的热电联产(combined heat and power,CHP)机组优化配置方案,以电压幅值、综合网损及经济成本作为综合优化目标,运用次序配置策略,采用电-热直接潮流法、加权求和法和改进遗传算法求解上述问题。最后,通过对澳大利亚真实中压配电网进行仿真,验证了模型的合理性与有效性。展开更多
An integrated heat and power system(IHPS)is a promising approach for alleviating wind curtailment problems.In an IHPS,the combined heat and power(CHP)plant is the key component,which supplies both heat and electric lo...An integrated heat and power system(IHPS)is a promising approach for alleviating wind curtailment problems.In an IHPS,the combined heat and power(CHP)plant is the key component,which supplies both heat and electric loads,and couples the thermal system and power system.However,existing research commonly ignores or simplifies the internal composition of CHP plants,which could lead to some unavoidable errors.This paper focuses on the internal composition of CHP plants,and models the physical processes in different components and flexible resources in the CHP plant.Furthermore,a joint dispatch problem of an IHPS with the above CHP plant models is formulated,and an iterative algorithm is developed to handle the nonlinearity in this problem.Case studies are performed based on a real CHP plant in Northern China,and the results indicate that the synergistic effect of different energy resources in the CHP plant is realized by the joint dispatch model,which promotes wind power accommodation and reduces fossil fuel consumption.展开更多
This paper is focused on description of cool production in using WHR （Waste Heat Technology） Technology-a new method of centralized production of heat by using the waste heat from generated exhaust gas, which has be...This paper is focused on description of cool production in using WHR （Waste Heat Technology） Technology-a new method of centralized production of heat by using the waste heat from generated exhaust gas, which has been in 2009 developed and operated by companies HELORO s.r.o, and COMTHERM s.r.o.展开更多
Combined heat-and-power units(CHPUs)of biogas plants can be operated at partial load or in intervals to respond to market conditions or interventions by the grid operators.In this study,we present calculations for the...Combined heat-and-power units(CHPUs)of biogas plants can be operated at partial load or in intervals to respond to market conditions or interventions by the grid operators.In this study,we present calculations for the specific greenhouse gas(GHG)emissions of electricity from biogas driven CHPUs in dependence of engine load.Following the methodology of life cycle assessment and using measured data from five real-world biogas plants in Bavaria,we investigated the following scenarios for the operation of the CHPU:(1)full load,(2)80%load response and(3)60%load response.Our system boundary included the whole biogas production chain,starting from the production/supply of the input materials and ending at the supply of electricity(functional unit:1 kWh of electrical energy fed into the grid).As electrical efficiency and engine load are positively correlated,partial-load operation results in higher specific GHG emissions of electricity from biogas.The impact of decreasing efficiency of the CHPU under partial load on overall specific GHG emissions turned out to be higher than the influence of methane slip from the engine.Furthermore,the increase of further efficiencies such as higher yields,efficient use of synthetic and organic fertilizers,as well as minimization of fuel consumption and the use of regenerative fuels also lead to further decrease of GHG emissions.展开更多
文摘综合能源系统中,不同能源之间的相互转换可提高能源的利用效率,是区域综合能源系统规划的重要研究课题。就综合能源系统的结构而言,研究了冷热电联供系统(Combined Cooling Heat and Power,CCHP)、电转气装置(Power to Gas,P2G)、储气装置、热电联产机组(CHP)和太阳能光伏发电机组等设备互补协同作用下的成本。讨论了不同配置系统的经济性和可行性,建立了一系列模型,并且用粒子群算法进行求解。算例结果表明,配置蓄冷和储热模型在能源互联网系统中可以增加收益,同时能源的相互转化在一定程度上可以提高能源利用率,减少环境污染。
文摘为提高总体用能效率,构建综合能源系统是能源领域的重要发展趋势之一。在能源互联网中,综合需求响应利用电、热等不同形式能源间的耦合互补关系,在需求侧进行能源转换设备的协同优化,激发综合能源网络的灵活性,有利于提升能源利用效率,降低供能和用能成本。为此,提出一种计及电-热综合需求侧响应的热电联产(combined heat and power,CHP)机组优化配置方案,以电压幅值、综合网损及经济成本作为综合优化目标,运用次序配置策略,采用电-热直接潮流法、加权求和法和改进遗传算法求解上述问题。最后,通过对澳大利亚真实中压配电网进行仿真,验证了模型的合理性与有效性。
基金supported by the National Key Research and Development Program of China under Grant 2017YFB0902100.
文摘An integrated heat and power system(IHPS)is a promising approach for alleviating wind curtailment problems.In an IHPS,the combined heat and power(CHP)plant is the key component,which supplies both heat and electric loads,and couples the thermal system and power system.However,existing research commonly ignores or simplifies the internal composition of CHP plants,which could lead to some unavoidable errors.This paper focuses on the internal composition of CHP plants,and models the physical processes in different components and flexible resources in the CHP plant.Furthermore,a joint dispatch problem of an IHPS with the above CHP plant models is formulated,and an iterative algorithm is developed to handle the nonlinearity in this problem.Case studies are performed based on a real CHP plant in Northern China,and the results indicate that the synergistic effect of different energy resources in the CHP plant is realized by the joint dispatch model,which promotes wind power accommodation and reduces fossil fuel consumption.
文摘This paper is focused on description of cool production in using WHR （Waste Heat Technology） Technology-a new method of centralized production of heat by using the waste heat from generated exhaust gas, which has been in 2009 developed and operated by companies HELORO s.r.o, and COMTHERM s.r.o.
基金funded by the Bavarian State Ministry for Nutrition,Agriculture and Forestry(project code EW/12/11),(project code BE/14/14).
文摘Combined heat-and-power units(CHPUs)of biogas plants can be operated at partial load or in intervals to respond to market conditions or interventions by the grid operators.In this study,we present calculations for the specific greenhouse gas(GHG)emissions of electricity from biogas driven CHPUs in dependence of engine load.Following the methodology of life cycle assessment and using measured data from five real-world biogas plants in Bavaria,we investigated the following scenarios for the operation of the CHPU:(1)full load,(2)80%load response and(3)60%load response.Our system boundary included the whole biogas production chain,starting from the production/supply of the input materials and ending at the supply of electricity(functional unit:1 kWh of electrical energy fed into the grid).As electrical efficiency and engine load are positively correlated,partial-load operation results in higher specific GHG emissions of electricity from biogas.The impact of decreasing efficiency of the CHPU under partial load on overall specific GHG emissions turned out to be higher than the influence of methane slip from the engine.Furthermore,the increase of further efficiencies such as higher yields,efficient use of synthetic and organic fertilizers,as well as minimization of fuel consumption and the use of regenerative fuels also lead to further decrease of GHG emissions.
