针对带脉冲负载的电池储能系统(battery energy storage system with pulsed load,BESS-PL)源载耦合和脉冲特性建模问题,采用状态空间法和信号平均法分别构建了BESS-PL源载耦合精确模型和平均模型,基于此提出了一种准精确建模方法,对高...针对带脉冲负载的电池储能系统(battery energy storage system with pulsed load,BESS-PL)源载耦合和脉冲特性建模问题,采用状态空间法和信号平均法分别构建了BESS-PL源载耦合精确模型和平均模型,基于此提出了一种准精确建模方法,对高频分量合理简化,保留了BESS-PL特有的脉冲特性,从而构建BESS-PL源载耦合准精确模型。通过稳定性理论分析和仿真,对比3种BESS-PL源载耦合数学模型的特点和不同适用情况。其中,基于平均模型推导BESS-PL系统的稳态传递函数,利用波特图分析讨论脉冲占空比和DC/DC变换器开关占空比对稳定性的影响规律;结合3种模型仿真,分析了BESS-PL系统关键参量和源载功率的关联规律、脉动特性及占空比对稳定性的影响规律。3种建模方法可灵活用于BESS-PL系统源载耦合特性和脉冲特性的暂稳态分析。展开更多
To optimize peaking operation when high proportion new energy accesses to power grid,evaluation indexes are proposed which simultaneously consider wind-solar complementation and source-load coupling.A typical wind-sol...To optimize peaking operation when high proportion new energy accesses to power grid,evaluation indexes are proposed which simultaneously consider wind-solar complementation and source-load coupling.A typical wind-solar power output scene model based on peaking demand is established which has anti-peaking characteristic.This model uses balancing scenes and key scenes with probability distribution based on improved Latin hypercube sampling(LHS)algorithm and scene reduction technology to illustrate the influence of wind-solar on peaking demand.Based on this,a peak shaving operation optimization model of high proportion new energy power generation is established.The various operating indexes after optimization in multi-scene peaking are calculated,and the ability of power grid peaking operation is compared whth that considering wind-solar complementation and source-load coupling.Finally,a case of high proportion new energy verifies the feasibility and validity of the proposed operation strategy.展开更多
Heat exchanger systems(HXSs)or heat recovery steam generators(HRSGs)are commonly used in 100 kW to 50 MW combined cooling,heating,and power(CCHP)systems.Power flow coupling(PFC)is found in HXSs and is complex for rese...Heat exchanger systems(HXSs)or heat recovery steam generators(HRSGs)are commonly used in 100 kW to 50 MW combined cooling,heating,and power(CCHP)systems.Power flow coupling(PFC)is found in HXSs and is complex for researchers to quantify.This could possibly mislead the dispatch schedule and result in the inaccurate dispatch.PFC is caused by the inlet and outlet temperatures of each component,gas flow pressure variation,conductive medium flow rate,and atmosphere condition variation.In this paper,the expression of PFC is built by using quadratic functions to fit the non!inearit>of thermal dynamics.While fitting the model,the environmental condition needs prediction,which is calculated using phase space reconstruction(PSR)Kalman filter.In order to solve the complex quadratic dispatch model,a hybrid following electricity load(FEL)and following thermal load(FTL)mode for reducing the dimension of dispatch model,and a feasible zone analysis(FZA)method are proposed.As a result,the PFC problem of CCHP system is solved,and the dispatch cost,investment cost,and the maximum power requirements are optimized.In this paper,a case in Jinan,China is studied.The PFC model is proven to be more precise and accurate compared with traditional models.展开更多
文摘针对带脉冲负载的电池储能系统(battery energy storage system with pulsed load,BESS-PL)源载耦合和脉冲特性建模问题,采用状态空间法和信号平均法分别构建了BESS-PL源载耦合精确模型和平均模型,基于此提出了一种准精确建模方法,对高频分量合理简化,保留了BESS-PL特有的脉冲特性,从而构建BESS-PL源载耦合准精确模型。通过稳定性理论分析和仿真,对比3种BESS-PL源载耦合数学模型的特点和不同适用情况。其中,基于平均模型推导BESS-PL系统的稳态传递函数,利用波特图分析讨论脉冲占空比和DC/DC变换器开关占空比对稳定性的影响规律;结合3种模型仿真,分析了BESS-PL系统关键参量和源载功率的关联规律、脉动特性及占空比对稳定性的影响规律。3种建模方法可灵活用于BESS-PL系统源载耦合特性和脉冲特性的暂稳态分析。
基金Youth Science and Technology Fund Project of Gansu Province(No.18JR3RA011)Major Projects in Gansu Province(No.17ZD2GA010)+1 种基金Science and Technology Projects Funding of State Grid Corporation(No.522727160001)Science and Technology Projects of State Grid Gansu Electric Power Company(No.52272716000K)
文摘To optimize peaking operation when high proportion new energy accesses to power grid,evaluation indexes are proposed which simultaneously consider wind-solar complementation and source-load coupling.A typical wind-solar power output scene model based on peaking demand is established which has anti-peaking characteristic.This model uses balancing scenes and key scenes with probability distribution based on improved Latin hypercube sampling(LHS)algorithm and scene reduction technology to illustrate the influence of wind-solar on peaking demand.Based on this,a peak shaving operation optimization model of high proportion new energy power generation is established.The various operating indexes after optimization in multi-scene peaking are calculated,and the ability of power grid peaking operation is compared whth that considering wind-solar complementation and source-load coupling.Finally,a case of high proportion new energy verifies the feasibility and validity of the proposed operation strategy.
基金the National Natural Science Foundation of China(No.61733010).
文摘Heat exchanger systems(HXSs)or heat recovery steam generators(HRSGs)are commonly used in 100 kW to 50 MW combined cooling,heating,and power(CCHP)systems.Power flow coupling(PFC)is found in HXSs and is complex for researchers to quantify.This could possibly mislead the dispatch schedule and result in the inaccurate dispatch.PFC is caused by the inlet and outlet temperatures of each component,gas flow pressure variation,conductive medium flow rate,and atmosphere condition variation.In this paper,the expression of PFC is built by using quadratic functions to fit the non!inearit>of thermal dynamics.While fitting the model,the environmental condition needs prediction,which is calculated using phase space reconstruction(PSR)Kalman filter.In order to solve the complex quadratic dispatch model,a hybrid following electricity load(FEL)and following thermal load(FTL)mode for reducing the dimension of dispatch model,and a feasible zone analysis(FZA)method are proposed.As a result,the PFC problem of CCHP system is solved,and the dispatch cost,investment cost,and the maximum power requirements are optimized.In this paper,a case in Jinan,China is studied.The PFC model is proven to be more precise and accurate compared with traditional models.
