Precautions for maintenance of photovoltaic inverter

Photovoltaic power generation is supported by national policies, whether in urban or rural areas, the arrival of this 630 has staged an installation boom. On the other hand, photovoltaic power generation has advantages that other traditional energy sources cannot match. No one is perfect, let alone a mechanical industrial product. In terms of maintenance, it is necessary to remind people who are engaged in photovoltaic power generation service professions, go to the project site, and pay attention to safety when dealing with faults. Then today I will give you the most important part of repairing photovoltaic power generation after grid connection-reverse What to pay attention to when changing the converter.

Photovoltaic power generation is a technology that uses the photovoltaic effect of the semiconductor interface to directly convert light energy into electrical energy. The key element 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 solar cell module. Together with inverters and other components, a photovoltaic power generation device is formed. The advantage of photovoltaic power generation is that it is less geographically restricted, because the sun shines on the earth; photovoltaic systems also have the advantages of safety, reliability, no noise, low pollution, no need to consume fuel and erect transmission lines to generate power and supply on-site, and the construction period is short.

As an electronic product, photovoltaic inverter is composed of many components. Inverters are also called power regulators. According to their use in photovoltaic power generation systems, they can be divided into independent power supplies and grid-connected ones. 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 inverters used in grid-connected systems can be divided into transformer-type inverters and non-transformer-type inverters according to whether there is a transformer. When connecting to the grid for power generation, it must be connected to the power grid. This is important because of its particularity. You must not be careless during installation and maintenance, otherwise hidden dangers of this kind may occur. So how do we pay attention? Here we start from the maintenance aspect.

The maintenance needs to pay attention to the following points:

1. Before performing any maintenance work, first disconnect the electrical connection between the inverter and the grid, and then disconnect the electrical connection on the DC side.

2. Wait at least 5 minutes until the internal components are discharged before proceeding with maintenance work.

3. Any fault that affects the safety performance of the inverter must be eliminated immediately before the inverter can be turned on again.

4. Avoid unnecessary circuit board contact

5. Comply with electrostatic protection regulations and wear an anti-static bracelet.

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

7. Preliminarily visually check the equipment for damage or other dangerous conditions before operation.

8. Pay attention to the hot surface of the inverter. For example, the radiator of the power semiconductor, etc., maintain a high temperature for a period of time after the inverter is powered off.

Finally, after the machine is repaired, it is necessary to ensure that any faults affecting the safety performance of the inverter have been resolved before the inverter can be turned on again.

Understand the maintenance specifications of photovoltaic grid-connected inverters, and pay attention to them in the daily maintenance and repair process, so as to avoid hidden dangers.