The coordinated control of multiple-sources including wind,photovoltaic(PV)and storage brings new challenges to traditional dispatch and control technologies.This paper firstly introduces a framework of wind,PV and st...The coordinated control of multiple-sources including wind,photovoltaic(PV)and storage brings new challenges to traditional dispatch and control technologies.This paper firstly introduces a framework of wind,PV and storage co-generation monitoring system.Then,key technologies of co-generation monitoring system including day-ahead optimal dispatching,active power coordinated control and reactive power and voltage control are proposed.The framework and the techniques described in this paper have been applied in the National Wind,Photovoltaic,Storage and Transmission Demonstration Project of China,and their validity have been tested and verified.展开更多
针对环境温度和光照强度对光伏系统最优工作点的严重影响,提出一种快速跟踪环境温度和光照强度变化的最大功率点跟踪(Maximum Power Point Tracking,MPPT)电路结构及控制算法。通过分析太阳电池基本性质,设计一种改进型的Buck变换器拓...针对环境温度和光照强度对光伏系统最优工作点的严重影响,提出一种快速跟踪环境温度和光照强度变化的最大功率点跟踪(Maximum Power Point Tracking,MPPT)电路结构及控制算法。通过分析太阳电池基本性质,设计一种改进型的Buck变换器拓扑结构,可快速采样短路电流和开路电压信号。在建立光伏发电系统小信号模型的基础上,设计一种非线性控制与线性控制相结合的改进型最大功率点跟踪控制算法,该算法外环为改进的扰动观察(Perturbation and Observation,P&O)法,内环为电压控制环路。仿真和实验表明,该算法不但能在环境变化时快速准确地跟踪光伏电池最大输出功率点,消除系统在最大功率点的振荡,而且具有效率高、响应速度快等优点。展开更多
There is a growing need to explore the potential of coal-fired power plants(CFPPs)to enhance the utilization rate of wind power(wind)and photovoltaic power(PV)in the green energy field.This study developed a load regu...There is a growing need to explore the potential of coal-fired power plants(CFPPs)to enhance the utilization rate of wind power(wind)and photovoltaic power(PV)in the green energy field.This study developed a load regulation model for a multi-power generation system comprising wind,PV,and coal energy storage using realworld data.The power supply process was divided into eight fundamental load regulation scenarios,elucidating the influence of each scenario on load regulation.Within the framework of the multi-power generation system with the wind(50 MW)and PV(50 MW)alongside a CFPP(330 MW),a lithium-iron phosphate energy storage system(LIPBESS)was integrated to improve the system’s load regulation flexibility.The energy storage operation strategy was formulated based on the charging and discharging priority of the LIPBESS for each basic scenario and the charging and discharging load calculation method of LIPBESS auxiliary regulation.Through optimization using the particle swarm algorithm,the optimal capacity of LIPBESS was determined to be within the 5.24-4.88 MWh range.From an economic perspective,the LIPBESS operating with CFPP as the regulating power source was 49.1% lower in capacity compared to the renewable energy-based storage mode.展开更多
针对影响光伏发电系统出力的两个因素(光照辐射强度和光伏组件温度)分别建立相应的时序数学模型。引入运行状态系数(operation state coefficient,OSC)表征设备运行状态对光伏发电系统出力的影响。将光照资源的波动性和设备的运行状态...针对影响光伏发电系统出力的两个因素(光照辐射强度和光伏组件温度)分别建立相应的时序数学模型。引入运行状态系数(operation state coefficient,OSC)表征设备运行状态对光伏发电系统出力的影响。将光照资源的波动性和设备的运行状态相结合,得出光伏发电系统的多状态时序出力模型。采用序贯蒙特卡罗法,对含光伏发电系统的配电网进行可靠性评估,通过不同的指标来衡量光伏发电系统对配电网可靠性的影响。研究表明,光伏发电系统接入配电网后能有效提高配电网的供电可靠性。展开更多
文摘The coordinated control of multiple-sources including wind,photovoltaic(PV)and storage brings new challenges to traditional dispatch and control technologies.This paper firstly introduces a framework of wind,PV and storage co-generation monitoring system.Then,key technologies of co-generation monitoring system including day-ahead optimal dispatching,active power coordinated control and reactive power and voltage control are proposed.The framework and the techniques described in this paper have been applied in the National Wind,Photovoltaic,Storage and Transmission Demonstration Project of China,and their validity have been tested and verified.
文摘针对环境温度和光照强度对光伏系统最优工作点的严重影响,提出一种快速跟踪环境温度和光照强度变化的最大功率点跟踪(Maximum Power Point Tracking,MPPT)电路结构及控制算法。通过分析太阳电池基本性质,设计一种改进型的Buck变换器拓扑结构,可快速采样短路电流和开路电压信号。在建立光伏发电系统小信号模型的基础上,设计一种非线性控制与线性控制相结合的改进型最大功率点跟踪控制算法,该算法外环为改进的扰动观察(Perturbation and Observation,P&O)法,内环为电压控制环路。仿真和实验表明,该算法不但能在环境变化时快速准确地跟踪光伏电池最大输出功率点,消除系统在最大功率点的振荡,而且具有效率高、响应速度快等优点。
基金supported by the Natural Science Foundation of China(Grant Nos.52076079,52206010)Natural Science Foundation of Hebei Province,China(Grant No.E2020502013)the Fundamental Research Funds for the Central Universities(2021MS076,2021MS079).
文摘There is a growing need to explore the potential of coal-fired power plants(CFPPs)to enhance the utilization rate of wind power(wind)and photovoltaic power(PV)in the green energy field.This study developed a load regulation model for a multi-power generation system comprising wind,PV,and coal energy storage using realworld data.The power supply process was divided into eight fundamental load regulation scenarios,elucidating the influence of each scenario on load regulation.Within the framework of the multi-power generation system with the wind(50 MW)and PV(50 MW)alongside a CFPP(330 MW),a lithium-iron phosphate energy storage system(LIPBESS)was integrated to improve the system’s load regulation flexibility.The energy storage operation strategy was formulated based on the charging and discharging priority of the LIPBESS for each basic scenario and the charging and discharging load calculation method of LIPBESS auxiliary regulation.Through optimization using the particle swarm algorithm,the optimal capacity of LIPBESS was determined to be within the 5.24-4.88 MWh range.From an economic perspective,the LIPBESS operating with CFPP as the regulating power source was 49.1% lower in capacity compared to the renewable energy-based storage mode.
文摘针对影响光伏发电系统出力的两个因素(光照辐射强度和光伏组件温度)分别建立相应的时序数学模型。引入运行状态系数(operation state coefficient,OSC)表征设备运行状态对光伏发电系统出力的影响。将光照资源的波动性和设备的运行状态相结合,得出光伏发电系统的多状态时序出力模型。采用序贯蒙特卡罗法,对含光伏发电系统的配电网进行可靠性评估,通过不同的指标来衡量光伏发电系统对配电网可靠性的影响。研究表明,光伏发电系统接入配电网后能有效提高配电网的供电可靠性。
