Installation and precautions of inverter in distributed photovoltaic power station

I Photovoltaic inverter Installation process.

1. Open the box to check whether the product parts, installation tools and parts are complete and whether the installation environment meets the regulations.

2. Electrical wiring, current side wiring, AC and DC side wiring, grounding, communication and accessory inspection.

3. Install photovoltaic array test, AC, DC side line test, DC line test, grounding, communication and accessories test.

4. The on-line operation test can be formally run if there is no problem. If any problem is found, continue to run after the problem is solved.

5. Formal operation.

2、 Precautions for inverter installation.

1. Site environment.

The installation site shall consider whether the surrounding environment is right Photovoltaic inverter Avoid direct sunlight on the inverter, otherwise it will cause The internal temperature of the equipment is too high, resulting in inverter temperature failure, which affects the power generation of the inverter. At the same time, it shall be ensured that there is no influence of other power electronic equipment around.

2. Installation requirements.

When installing the inverter, keep a certain distance around it to facilitate the heat dissipation of the inverter and the later maintenance of the inverter manufacturer. If the selected inverter has no lightning protection function, the lightning protection system shall be input at the DC side and well grounded. During the initial installation, the network point shall be reasonably selected and. It is strictly prohibited to install high-capacity photovoltaic power generation system at the end of the village. If more than 3 (including) inverters are installed, they shall be connected to different phase live lines for grid connection to prevent inverter overvoltage.

3. Preparation of electrical connection.

Before electrical connection, the photovoltaic panel must be covered with opaque material or the DC side circuit breaker must be cut off. Otherwise, under direct sunlight for a long time, the photovoltaic array will produce dangerous voltage.

4. Conditions of electrical materials and wiring.

The cable used in the photovoltaic power station must be qualified and firmly connected. DC photovoltaic cables must be pressed with special crimping pliers to avoid accidents caused by poor contact in the later stage. The electrical installation must comply with local and national electrical standards, and the installation operation must be completed by professional technicians.

5. Approved by the power department.

The inverter can only be connected to the grid for power generation with the approval of the local power department.

3、 Precautions for inverter maintenance.

    1. Disconnect.

In the photovoltaic power station system, no matter what maintenance work is carried out, the electrical connection between the inverter and the power grid must be cut off first, and then the electrical connection at the DC side must be cut off. Secondly, wait for at least 5 minutes until the internal components of the inverter are discharged.

2. Identify hazards.

During the maintenance operation, preliminarily visually check whether the equipment is damaged or other dangerous conditions. During the specific operation, observe the electrostatic protection specifications, wear an anti-static bracelet, pay attention to the warning signs on the product, pay attention to whether the temperature of the hot surface of the frequency converter is cooled, and avoid unnecessary contact between the human body and the circuit board.

    3. Solve the problem.

After the maintenance is completed, the frequency converter can be started for work only after ensuring that any fault affecting the safety performance of the frequency converter has been solved.