For a standalone PV （photovoltaic） power generation system, the author previously proposed a new MPPT （maximum power point tracking） control method in which the I-V characteristics are scanned with a detection int...For a standalone PV （photovoltaic） power generation system, the author previously proposed a new MPPT （maximum power point tracking） control method in which the I-V characteristics are scanned with a detection interval control that operates at specified intervals and monitors the maximum power point. The author has obtained satisfactory results using this new MPPT control method. This paper investigates the application of the new MPPT control method for a PCS （power conditioning system） in a grid-connected type PV power generation system. The experimental results clearly demonstrate that the developed PCS offers outstanding effectiveness in tracking the maximum power point in partially shaded environments.展开更多
This paper proposes a new peak current control switching(PCCS)method for single-phase inverter in photovoltaic(PV)generation system.This method minimizes the difference between a peak current and the current command w...This paper proposes a new peak current control switching(PCCS)method for single-phase inverter in photovoltaic(PV)generation system.This method minimizes the difference between a peak current and the current command with a constant switching frequency.In this paper,the principle and the simulation results of the proposed method are described.In this paper,the principle and the simulated transient characteristics of this PCCS method are described.From the results,it is clarified that the proposed switching method is effective.展开更多
储能变换器(Power Conversion System for Energy Storage,PCS)作为储能电池组与电网之间的关键接口单元,其能否稳定运行关系着电网电能质量的优劣。因此,根据电池储能PCS的充放电功率与无功功率,获取直流侧积累的过剩能量和三相电路中...储能变换器(Power Conversion System for Energy Storage,PCS)作为储能电池组与电网之间的关键接口单元,其能否稳定运行关系着电网电能质量的优劣。因此,根据电池储能PCS的充放电功率与无功功率,获取直流侧积累的过剩能量和三相电路中的电流,得到大规模电池储能PCS三相电路中的低电压数值。设计自适应控制器,将计算得到的低电压数值作为输入,调整内部参数以最小化电压相位和磁链幅值误差,实现低电压穿越稳定性控制。试验结果表明,设计方法实测电压最大波动幅度为0.9V,远低于文献[1]的1.4V和文献[2]的1.7V,较理想波动上限1.1V减少0.2V,有效验证了该方法在维护电网稳定运行方面的显著优势。展开更多
文摘For a standalone PV （photovoltaic） power generation system, the author previously proposed a new MPPT （maximum power point tracking） control method in which the I-V characteristics are scanned with a detection interval control that operates at specified intervals and monitors the maximum power point. The author has obtained satisfactory results using this new MPPT control method. This paper investigates the application of the new MPPT control method for a PCS （power conditioning system） in a grid-connected type PV power generation system. The experimental results clearly demonstrate that the developed PCS offers outstanding effectiveness in tracking the maximum power point in partially shaded environments.
文摘This paper proposes a new peak current control switching(PCCS)method for single-phase inverter in photovoltaic(PV)generation system.This method minimizes the difference between a peak current and the current command with a constant switching frequency.In this paper,the principle and the simulation results of the proposed method are described.In this paper,the principle and the simulated transient characteristics of this PCCS method are described.From the results,it is clarified that the proposed switching method is effective.
文摘储能变换器(Power Conversion System for Energy Storage,PCS)作为储能电池组与电网之间的关键接口单元,其能否稳定运行关系着电网电能质量的优劣。因此,根据电池储能PCS的充放电功率与无功功率,获取直流侧积累的过剩能量和三相电路中的电流,得到大规模电池储能PCS三相电路中的低电压数值。设计自适应控制器,将计算得到的低电压数值作为输入,调整内部参数以最小化电压相位和磁链幅值误差,实现低电压穿越稳定性控制。试验结果表明,设计方法实测电压最大波动幅度为0.9V,远低于文献[1]的1.4V和文献[2]的1.7V,较理想波动上限1.1V减少0.2V,有效验证了该方法在维护电网稳定运行方面的显著优势。
