Photovoltaic power generation is a high-tech technology that directly converts light energy into electric energy by using the photovoltaic effect at the semiconductor interface. The key component of this technology is solar cells. After the solar cells are sealed and protected in series, a large area of solar cell modules can be formed, and then combined with inverters and other components to form a photovoltaic power generation device. The advantage of photovoltaic power generation is less limited by region, because the sun shines on the earth; The photovoltaic system also has the advantages of safety, reliability, no noise, low pollution, local power generation and power supply without fuel consumption and transmission line erection, and short construction period.

光伏逆变器作为一项电子产品，由众多元器件组成。逆变器又称电源调整器，根据逆变器在光伏发电系统中的用途可以归纳为独立型电源用和并网用二种。根据波形调制方式又可以细分为方波逆变器阶梯波逆变器正弦波逆变器和组合式三相逆变器。对于用于并网系统的逆变器，根据有无变压器又可再细分为变压器型逆变器和无变变压器型逆变器。当并网发电的时候还要和电网相连，这里就要注意了，因为它的特殊性，在安装维修的时候万万不能粗心大意，否则的话可能出现这样那样的隐患，甚至危及人身安全。那么我们该如何去注意呢? 首先我们得从维修方面讲起。

As an electronic product, photovoltaic inverter is composed of multiple devices. Inverter, also known as power regulator, can be divided into independent power supply and grid connection according to the use of inverter in photovoltaic power generation system. According to the waveform modulation mode, it can be subdivided into square wave inverter, step wave inverter, sine wave inverter and combined three-phase inverter. The inverter used in grid connected system can be subdivided into transformer inverter and transformer free inverter according to the presence or absence of transformer. When the grid connected power generation is connected to the power grid, we should pay attention to it. Because of its particularity, we must not be careless in installation and maintenance, otherwise there may be hidden dangers and even endanger personal safety. So how do we pay attention? First of all, we have to start with maintenance.

光伏发电系统安装并网后，难免不出现问题，出现问题后就要及时进行检查维修，光伏逆变器保养应注意些什么

After the photovoltaic power generation system is installed and connected to the grid, it is inevitable that there will be no problems. In case of problems, it should be inspected and repaired in time. What should be paid attention to in the maintenance of photovoltaic inverter

维修时需注意一下几点：

Pay attention to the following points during maintenance:

在进行任何维修工作前，首先要断开逆变器与电网的电气连接，然后断开直流侧电气连接。

Before any maintenance work, first disconnect the electrical connection between the inverter and the power grid, and then disconnect the electrical connection at the DC side.

等待至少5分钟直到内部元件放电完毕方可进行维修工作。

Wait for at least 5 minutes until the internal components are discharged before maintenance.

任何影响逆变器安全性能的故障必须立即排除才可以再次开启逆变器。

Any fault affecting the safety performance of the inverter must be eliminated immediately before the inverter can be started again.

避免不必要的电路板接触

Avoid unnecessary board contact

遵守静电防护规范，佩戴防静电手环。

Observe the electrostatic protection specifications and wear anti-static bracelets.

注意并遵守产品上的警告标识。

Pay attention to and observe the warning signs on the product.

操作前初步目视检查设备有无损坏或其它危险状态。

Conduct a preliminary visual inspection of the equipment for damage or other dangerous conditions before operation.

注意逆变器热表面。比如功率半导体的散热器等，在逆变器断电后一段时间内，仍保持较高温度，这时要防止烫伤。

Pay attention to the hot surface of the inverter. For example, the radiator of power semiconductor still maintains a high temperature for a period of time after the inverter is powered off. At this time, scald shall be prevented.

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