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首页> 外文会议>European photovoltaic solar energy conference >INFLUENCE OF THE SIZING FACTOR OF THE INVERTER ON THE CORRELATION BETWEEN ELECTRIC POWER AND SOLAR IRRADIANCE IN A GRID-CONNECTED PHOTOVOLTAIC PLANT
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INFLUENCE OF THE SIZING FACTOR OF THE INVERTER ON THE CORRELATION BETWEEN ELECTRIC POWER AND SOLAR IRRADIANCE IN A GRID-CONNECTED PHOTOVOLTAIC PLANT

机译：光伏电站并网逆变器的选型因素对功率与太阳辐照度的关系的影响

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This work presents an analysis of the influence of the sizing factor of the inverter (SFI) on thedelivered power of a 4800 WP grid-connected photovoltaic system located at UFRGS Solar Energy Laboratory, PortoAlegre RS, Brazil. The installation is divided in three identical subsystems, each one constituted by two strings of100 WP / 24 V modules. For experimental purposes, the number of modules in each string can be varied from six upto eight. The arrays feed three 1100 W single phase string inverters. Three different cloudless days were analyzed.The experimental results indicated that the correlation between array power and irradiance was closely linear forsystems with high values of SFI. For the subsystems with lower SFIs, the correlation presented nonlinearities at highirradiances due to the actuation of the power limit and/or the overheating protection of the inverters. It was observedalso that the measured output power in cloudless days, for equivalent solar irradiances, is slightly higher during themorning than in the afternoon, as a consequence of the operating temperature of the modules to be higher in theafternoon.
机译：这项工作提出了对逆变器（SFI）尺寸因子对电机尺寸的影响的分析。 位于波尔图UFRGS太阳能实验室的4800 WP并网光伏系统的输出功率 巴西阿雷格里RS。装置分为三个相同的子系统，每个子系统由两串组成 100 WP / 24 V模块。出于实验目的，每个字符串中的模块数量可以从六个开始变化 到八点阵列为三个1100 W单相串式逆变器供电。分析了三个不同的无云天。 实验结果表明，阵列功率与辐照度之间的关系近似为 具有高SFI值的系统。对于具有较低SFI的子系统，相关性表现出较高的非线性 功率限制和/或逆变器过热保护引起的辐射。它被观察到 同样在相同的太阳辐照度下，在无云的日子里测得的输出功率在 由于模块的工作温度在早上要比下午要高。 下午。

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