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POWER QUALITY ISSUES ON DC-BUS-CONNECTED PHOTOVOLTAIC SYSTEM

机译:直流母线连接光伏系统的电能质量问题

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Monitoring and diagnosis of power quality is an important aspect in studies pertaining to the performance of a photovoltaic (PV) system. This research analyzes the role of a mixed snubber circuit in reducing the conducted electromagnetic interference (EMI) emissions on a charge controller of a low power, standalone, PV system connected to a common DC bus. The mixed snubber circuit has been found to suppress the conducted EMI and reduce power dissipation in a MOSFET when connected across a MOSFET-based buck converter. This research reports the effects of the conducted EMI for varying ranges of duty cycle of the buck converter for achieving maximum power tracking. This research has been carried out on a standalone, 4050 W PV plant, and the conducted EMI has been measured in real time and also verified by carrying out a simulation using PSPICE software to ascertain the effectiveness of the mixed snubber circuit. The results of the simulation were found to be in agreement with the results of various experimental studies. The exhaustive analysis indicates that the mitigation of EMI is due to the addition of the mixed snubber circuit along with the MOSFET-based converter arrangement.
机译:电能质量的监视和诊断是有关光伏(PV)系统性能的研究中的重要方面。这项研究分析了混合缓冲电路在减少连接到公共DC总线的低功率独立PV系统的充电控制器上的传导电磁干扰(EMI)辐射中的作用。当跨过基于MOSFET的降压转换器连接时,已经发现混合缓冲电路可抑制传导EMI并降低MOSFET的功耗。这项研究报告了传导EMI对降压转换器占空比变化范围的影响,以实现最大功率跟踪。这项研究是在一个独立的4050 W光伏电站上进行的,对传导EMI进行了实时测量,并通过使用PSPICE软件进行仿真来确定混合缓冲电路的有效性,从而进行了验证。发现仿真结果与各种实验研究的结果一致。详尽的分析表明,EMI的降低是由于混合缓冲电路以及基于MOSFET的转换器装置的添加而造成的。

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