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DC-Current Sensor-Less MPPT Based Grid-Fed Single-Phase Photovoltaic (PV) Micro-Inverter

机译:DC电流传感器的MPPT基准的网格式单相光伏(PV)微逆变器

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Abstract This paper presents grid-feeding type micro-inverter for a single-phase grid-interactive photovoltaic (PV) system. The system comprises of two stages, a step-up DC-DC converter with series resonant type voltage multiplier-a doubler and an inverter operating on single-switch modulation technique in order to improve efficiency of system. Use of single switch-modulating inverter helps in preventing shoot-through problem. The PV current from array is estimated without employing a DC current sensor to make system operate at maximum power point (MPP). A simulation for low power 300 W PV system without DC-current sensor maximum power point tracking (MPPT) control has been carried out to analyze cost effectiveness solution for small power rooftop applications. The simulation has been carried out on MATLAB®/Simulink platform under varying irradiation conditions to verify effectiveness of control technique and ripple present into injected grid current. The total harmonic distortion in grid current has been observed to be less than 5% even at as low as 0.25G irradiation to comply IEEE standards.
机译:摘要本文介绍了单相网交互式光伏(PV)系统的网格供给式微逆变器。该系统包括两个阶段,升压DC-DC转换器,具有串联谐振型电压倍增器 - 倍增器和在单开关调制技术上运行的逆变器,以提高系统效率。使用单个开关调制逆变器有助于防止射击问题。估计来自阵列的PV电流而不采用DC电流传感器以使系统在最大功率点(MPP)下操作。已经进行了用于低功耗300W PV系统的模拟,没有直流电流传感器最大功率点跟踪(MPPT)控制,以分析小型电源屋顶应用的成本效益解决方案。在不同的照射条件下,在MATLAB®/ Simulink平台上进行了模拟,以验证控制技术的有效性和在注入网格电流中的效果。甚至低至0.25g辐照以符合IEEE标准,网格电流中的总谐波变形均匀小于5%。

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