641 / 2019-01-20 23:52:58

Analysis of the Influence of Photovoltaic Grid-connected Inverter and Analog Grid Fluctuation

New energy, Photovoltaic systems, Photovoltaic grid-connected inverters, Power grid fluctuations

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The start of the energy crisis has made the development and application of renewable energy in society a concern. The development of science and technology will inevitably be accompanied by the consumption of non-renewable energy. In recent years, the massive use of non-renewable energy has increased the energy burden.
The advantages of photovoltaic systems are also clearly demonstrated, but there are also some hidden problems. If there are some hidden dangers, that is, when the power grid parameters abruptly deviate or are interrupted, there will be some impact on the PV power plant. And grid impedance fluctuations, even if the grid becomes unbalanced voltage, resulting in the negative sequence current generated by the grid-connected inverter, will affect the stability of the grid-connected inverter. In severe cases, the equipment in the power station will be damaged and even implicated in other devices. Photovoltaic equipment. This article focuses on the impact of these parameter changes on the photovoltaic grid-connected inverters and analyzes them in detail to lay the foundation for the improvement of equipment losses in the future. Based on the simulation grid operating conditions, the grid-connected inverter test bench was used for the fluctuation test. Based on the fluctuations of different grid parameters, the influence of grid fluctuations on the grid-connected PV inverters is analyzed.