基于数字信号处理程序(digital signal processor,DSP),分别用登山法和瞬时扫描法对太阳能光伏发电系统的最大功率跟踪(max power point tracking,MPPT)进行试验.结果表明,两种算法都能对太阳能电池输出较好地实现最大功率跟踪,且通过M...基于数字信号处理程序(digital signal processor,DSP),分别用登山法和瞬时扫描法对太阳能光伏发电系统的最大功率跟踪(max power point tracking,MPPT)进行试验.结果表明,两种算法都能对太阳能电池输出较好地实现最大功率跟踪,且通过MPPT可提高太阳能光伏发电系统的转换效率.展开更多
This paper focuses on modeling and perfor- mance predetermination of a photovoltaic （PV） system with a boost converter fed permanent magnet direct current （PMDC） motor-centrifugal pump load, taking the con- verter...This paper focuses on modeling and perfor- mance predetermination of a photovoltaic （PV） system with a boost converter fed permanent magnet direct current （PMDC） motor-centrifugal pump load, taking the con- verter losses into account. Sizing is done based on the maximum power generated by the PV array at the average irradiation. Hence optimum sizing of the PV array for the given irradiation at the geographical location of interest is obtained using the predetermined values. The analysis presented here involves systems employing maximum power point tracking （MPPT） as they are more efficient than directly coupled systems. However, the voltage and power of the motor might rise above rated values for irradiations greater than the average when employing MPPT, hence a control scheme has been proposed to protect the PMDC motor from being damaged during these conditions. This control scheme appropriately chooses the optimum operating point of the system, ensuring long-term sustained operation. The numerical simulation of the system is performed in Matlab/Simulink and is validated with experimental results obtained from a 180 V, 0.5 hp PMDC motor coupled to a centrifugal pump. The operation of the system with the proposed control scheme is verified by varying the irradiation levels and the relevant results are presented.展开更多
文摘基于数字信号处理程序(digital signal processor,DSP),分别用登山法和瞬时扫描法对太阳能光伏发电系统的最大功率跟踪(max power point tracking,MPPT)进行试验.结果表明,两种算法都能对太阳能电池输出较好地实现最大功率跟踪,且通过MPPT可提高太阳能光伏发电系统的转换效率.
文摘This paper focuses on modeling and perfor- mance predetermination of a photovoltaic （PV） system with a boost converter fed permanent magnet direct current （PMDC） motor-centrifugal pump load, taking the con- verter losses into account. Sizing is done based on the maximum power generated by the PV array at the average irradiation. Hence optimum sizing of the PV array for the given irradiation at the geographical location of interest is obtained using the predetermined values. The analysis presented here involves systems employing maximum power point tracking （MPPT） as they are more efficient than directly coupled systems. However, the voltage and power of the motor might rise above rated values for irradiations greater than the average when employing MPPT, hence a control scheme has been proposed to protect the PMDC motor from being damaged during these conditions. This control scheme appropriately chooses the optimum operating point of the system, ensuring long-term sustained operation. The numerical simulation of the system is performed in Matlab/Simulink and is validated with experimental results obtained from a 180 V, 0.5 hp PMDC motor coupled to a centrifugal pump. The operation of the system with the proposed control scheme is verified by varying the irradiation levels and the relevant results are presented.
