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Reactive power compensation using derated power generation mode of modified P&O algorithm in grid-interfaced PV system

机译:在网格连接PV系统中使用改进的P&O算法的DRAP电力功率补偿

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A local load connected with the grid-interfaced photovoltaic (GIPV) system demands reactive power compensation at the distribution level. The compensation either fulfilled by the PV inverter or grid side arrangements such as capacitor bank, static VAR compensator or tap-changing transformers. Amongst both, the inverter has merit to compensate reactive power without using an additional compensator or oversizing the inverter rating. However, it always depends upon the availability of irradiance and especially when the inverter transfers power with full capacity has no margin to generate the reactive power. Therefore, to make the system flexible according to the demand of the local loads and to create a margin to generate the reactive power at any time instant, a GIPV system with modified perturb & observe (MP&O) maximum power point tracking (MPPT) technique has been proposed. This proposed technique with an intermediate boost converter extracts maximum power more efficiently as compared to the traditional MPPT technique. On the other hand, it curtails the generated active power and provides margin for the PV inverter to generate the reactive power. Further, the PV inverter generates active and reactive power to the local loads as well as transfer power to the grid using inverter control. The inverter control comprises of decoupled instantaneous active and reactive power control. In this control scheme, it maintains the DC-link voltage and power flow between the GIPV system and the grid under all available irradiance conditions. In this respect, a 30 kW GIPV system is simulated and performance of the system is validated using real-time OP4510 hardware-in-loop (HIL) setup. (c) 2021 Elsevier Ltd. All rights reserved.
机译:与电网接口光伏电压(GIPV)系统连接的局部负载要求在分配水平处要求无功功率补偿。通过PV逆变器或电网侧布置,例如电容器组,静态VAR补偿器或抽头改变变压器的补偿。在两者之间,逆变器具有补偿无功功率的优点,而无需使用额外的补偿器或超大逆变器额定值。但是,它始终取决于辐照度的可用性,特别是当逆变器转移完全容量的电力时没有裕度以产生无功功率。因此,为了使系统灵活根据本地负载的需求,并在任何时间瞬间创建余量以产生无功功率,GIPV系统具有修改的扰动和观察(MP&O)最大功率点跟踪(MPPT)技术具有已提出。与传统的MPPT技术相比,这种具有中间升压转换器的技术提取最大功率。另一方面,它会限制所产生的有功功率,并为PV逆变器提供余量以产生无功功率。此外,PV逆变器通过逆变器控制为局部负载产生与局部负载的主动和无功功率以及对网格的电力。逆变器控制包括去耦的瞬时主动和无功控制。在该控制方案中,它在所有可用的辐照度条件下维护GIPV系统和电网之间的直流链路电压和功率流。在这方面,模拟了30 kW GIPV系统,使用实时OP4510硬件循环(HIL)设置验证系统的性能。 (c)2021 elestvier有限公司保留所有权利。

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