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PERFORMANCE EVALUATION OF THE PV GENERATOR IN THE PV MICROGRID SYSTEM IN THAILAND

机译：泰国光伏微电网系统中光伏发电机的性能评估

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Normally, the main generators of microgrid system use controllable energy resources such as fossil fuel, biomass, biogas, hydro, etc for uncomplicated control. However, it is very challenging to control the microgrid system that uses uncontrollable energy resources such as solar and wind for main generators of microgrid system because they have many advantages. From this point, the PV microgrid system is constructed and operated at School of Renewable Energy Technology (SERT), Naresuan University for research and development of the microgrid system that is supplying 50% of total electricity demand by PV main generator. To achieve the electricity supply target, the performance evaluation of the PV generator is an important activity. By measuring the important parameters such as solar irradiance, PV array voltage, PV array current, and AC electrical power, these data were collected for a year from November 2008 to October 2009. The evaluation result of the PV generator is revealed that the average reference yield (Y_r), array yield (Y_A), and final yield (Y_f) are 5.21, 4.32, and 3.84 kWh/kWp day respectively. The average total loss of the PV generator is 26.27 % that comes from summing up the average capture losses (L_c) 17.21 % and average system losses (L_s) 9.06 %. The average overall PV plant efficiency (η_(tot)) is 10.41 %, and the average performance ratio (PR) is 73.45 %. While considering the system efficiency of the PV generator at various solar irradiance, we found that it has the lowest efficiency when the solar irradiance is in the range 0 -0.10 kW/m~2, its efficiency increases with the increasing in the solar irradiance from 0.10 to 0.35 kW/m~2, the efficiency becomes highest when the solar irradiance in the range of 0.35 to 0.65 kW/m~2, and its efficiency decreases slowly when the solar irradiance is in the range of 0.65 to 1.30 kW/m~2.
机译：通常，微电网系统的主要发电机使用可控制的能源，例如化石燃料，生物质，沼气，水力等进行简单的控制。然而，控制微电网系统是非常具有挑战性的，因为微电网系统具有许多优点，因此它们将不可控制的能源（例如太阳能和风能）用于微电网系统的主要发电机。从这一点来看，那瑞苏大学可再生能源技术学院（SERT）建造并运行了光伏微电网系统，以研究和开发微电网系统，该系统通过光伏主发电机满足总电力需求的50％。为了实现供电目标，光伏发电机的性能评估是一项重要的活动。通过测量太阳辐照度，光伏阵列电压，光伏阵列电流和交流电等重要参数，收集了从2008年11月至2009年10月的一年中的这些数据。光伏发电机的评估结果表明，平均参考发电量（Y_r），阵列发电量（Y_A）和最终发电量（Y_f）分别为5.21、4.32和3.84 kWh / kWp天。 PV发电机的平均总损耗为26.27％，这是通过将平均捕获损耗（L_c）17.21％和平均系统损耗（L_s）9.06％相加得出的。整体光伏电站的平均效率（η_（tot））为10.41％，平均性能比（PR）为73.45％。在考虑各种太阳辐照度下光伏发电机的系统效率时，我们发现当太阳辐照度在0 -0.10 kW / m〜2范围内时，其效率最低，随着太阳辐照度的增加，其效率会增加。 0.10至0.35 kW / m〜2，当太阳辐照度在0.35至0.65 kW / m〜2范围内时效率最高，而当太阳辐照度在0.65至1.30 kW / m范围内效率则缓慢降低〜2。

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