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首页> 外文期刊>IEEE Transactions on Energy Conversion >Operation Limits of Grid-Tied Photovoltaic Inverters With Harmonic Current Compensation Based on Capability Curves
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Operation Limits of Grid-Tied Photovoltaic Inverters With Harmonic Current Compensation Based on Capability Curves

机译：基于能力曲线的谐波电流补偿的网格连接光伏逆变器的操作限制

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摘要

Generally, due to variations in solar irradiance, photovoltaic (PV) inverters operate below their rated current. Therefore, the available current margin can be used to perform ancillary services, such as reactive power control and harmonic current compensation (HC) of nonlinear loads. An important component of the PV system is the passive filter, which attenuates the harmonic generated by inverter switching. The filter may reduce the inverter ability to compensate the harmonic currents. This work presents an investigation of inverter capability to provide HC of nonlinear loads. An algorithm is proposed to determine the capability curves of a multifunctional inverter during harmonic current compensation. The proposed methodology is validated in an experimental setup. The obtained results show that the proposed modeling can estimate with accuracy the minimum required dc-link voltage, when harmonic current compensation is performed by the PV inverter. Also, a sensitivity parameter analysis is carried out. Thus, the main system parameters that affect the inverter capability to provide harmonic current compensation are identified. Furthermore, simulation and experimental results validate the proposed approach.
机译：通常，由于太阳辐照度的变化，光伏（PV）逆变器在其额定电流下方工作。因此，可用电流余量可用于执行辅助服务，例如非线性负载的无功功率控制和谐波电流补偿（HC）。 PV系统的一个重要组成部分是被动滤波器，其衰减由逆变器切换产生的谐波。过滤器可以减少补偿谐波电流的逆变器能力。这项工作提出了对逆变器能力提供非线性负荷HC的研究。提出了一种算法来确定谐波电流补偿期间多功能逆变器的能力曲线。所提出的方法在实验设置中验证。所得结果表明，当PV逆变器执行谐波电流补偿时，所提出的建模可以精确估计最小所需的直流链路电压。此外，执行灵敏度参数分析。因此，识别影响逆变器能力以提供谐波电流补偿的主系统参数。此外，仿真和实验结果验证了所提出的方法。

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