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光伏逆变器维修过程中有有哪些注意事项?

返回列表 来源: 阳光工匠 发布日期: 2022.06.30 浏览次数:
光伏发电是利用半导体界面的光生伏特效应而将光能直接转变为电能的一种技术。这种技术的关键元件是太阳能电池。太阳能电池经过串联后进行封装保护可形成大面积的太阳电池组件,再配合上逆变器,功率控制器等部件就形成了 光伏 发电装置。

光伏发电的优点是较少受地域限制,因为阳光普照大地,光伏系统还具有安全可靠、无噪声、低污染、无需消耗燃料和架设输电线路即可就地发电供电及建设同期短的优点。

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分为独立型电源用和并网用二种。根据波形调制方式又可分为方波逆变器、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。那么我们该如何去注意呢?这里我们就从维修方面来说起。

光伏发电系统安装并网后,难免不出现问题,出现问题后就要进行检查维修,光伏逆变器维修注意事项有以下几点:

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

2、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。

3、任何影响逆变器安全性能的故障必须立即排除方可再次开启逆变器。

4、避免不必要的电路板接触

5、遵守静电防护规范,佩戴防静电手环。

6、注意并遵守产品上的警告标识。

7、操作前初步目视检查设备有无损坏或其它危险状态。

8、注意逆变器热表面。例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。

最后,机器维修完毕后,要确保任何影响逆变器安全性能的故障已将解决,才能再次开启逆变器。明白了光伏并网逆变器的维修规范,在日常维护维修过程中加以注意,这样才能避免隐患的发生。 

Photovoltaic power generation is a technology that directly converts light energy into electrical energy by using the photovoltaic effect at the semiconductor interface. The key component of this technology is the solar cell. After the solar cells are connected in series, they can be packaged and protected to form a large area of solar cell modules, and then combined with inverter, power controller and other components to form a photovoltaic power generation device.



The advantage of photovoltaic power generation is that it is less restricted 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 power transmission lines, and short construction period.



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 divided into square wave inverter, step wave inverter, sine wave inverter and combined three-phase inverter.



The inverter used in grid connected system can be divided into transformer type inverter and non transformer type inverter according to whether there is transformer or not. When the grid connected power generation is to be 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. So how do we pay attention? Here we will start from the aspect of maintenance.



After the photovoltaic power generation system is installed and connected to the grid, it is inevitable that there will be no problems. After problems occur, it is necessary to carry out inspection and maintenance. The precautions for photovoltaic inverter maintenance are as follows:



1. Before any maintenance work, the electrical connection between the inverter and the power grid shall be disconnected first, and then the DC side electrical connection shall be disconnected.



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



3. Any fault affecting the safety performance of the inverter must be eliminated immediately before starting the inverter again.



4. Avoid unnecessary board contact



5. Observe the static electricity protection specifications and wear anti-static bracelets.



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



7. Conduct preliminary visual inspection for damage or other dangerous conditions before operation.



8. Pay attention to the inverter hot surface. For example, the heat sink of the power semiconductor still maintains a high temperature for a period of time after the inverter is powered off.



Finally, after the machine is repaired, ensure that any fault affecting the safety performance of the inverter has been solved, and then start the inverter again. Understand the maintenance specifications of photovoltaic grid connected inverter and pay attention to them in the process of daily maintenance, so as to avoid hidden dangers.

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