Photovoltaic Grid-connected Cabinet

Product Overview

With the large-scale development of distributed photovoltaic power generation, the use of photovoltaic grid-connected cabinets is increasing. There are many types of distribution cabinets in the domestic power supply and distribution system, and their cabinet structures and technical parameters are different. Under the influence of the following factors, the designed drawings often need to be modified or even redesigned, which not only affects the construction plan of the power supply and distribution system, but also brings certain troubles to the distribution cabinet manufacturers to complete the production of distribution cabinets on time and with quality.

As the total outlet of the photovoltaic power station, the photovoltaic grid-connected cabinet exists in the photovoltaic system. It is a distribution device connecting the photovoltaic power station and the power grid. It can protect and measure the total amount of photovoltaic power generation, facilitate fault inspection and maintenance management, and improve the safety and economic benefits of the power generation system. It has multiple protection functions such as voltage loss detection and opening, voltage detection and closing, overcurrent protection, overvoltage protection, island protection, anti-reverse current protection, harmonic control, reactive power compensation, etc. At the same time, it has the function of displaying the operating parameters and status indication of the photovoltaic power generation system. It is widely used in photovoltaic power generation systems. It can be used with photovoltaic grid-connected inverters to form a complete set of photovoltaic power generation system solutions.

Experience sharing

1. Understand the needs of users and choose the cabinet type suitable for users according to the actual situation.

2. Try to use domestic cabinet types from domestic manufacturers. Do not blindly choose imported distribution cabinets with relatively high technical parameters, which will easily cause waste of resources.

3. Since the brands of the main components used in imported distribution cabinets are consistent with the cabinet body. Therefore, when choosing imported distribution cabinets, you should pay attention to the parameters of the main components, which can meet the needs of users.

Secondary equipment commonly used in photovoltaic grid-connected cabinets

Class A power quality online detection device: online monitoring of grid frequency, three-phase fundamental voltage, current effective value, fundamental active power, reactive power, power factor, phase, etc.; voltage deviation, frequency deviation, three-phase voltage imbalance, three-phase current imbalance, negative sequence voltage, current;

Anti-islanding protection device: mainly used in photovoltaic power stations due to abnormal voltage or frequency, and to predict the occurrence of islanding phenomena in advance, and quickly cut off the grid connection point switch, so that the photovoltaic power station and the grid are quickly disconnected.

Characteristics of photovoltaic grid-connected cabinets

The photovoltaic grid-connected cabinets used in distributed photovoltaic power stations have integrated the photovoltaic distribution boxes according to the requirements of the power grid company, greatly reducing the installation cost and improving the safety and reliability of the photovoltaic power station. The internal electrical cables and wiring are very standardized, and the distribution box is equipped with a series of safe, reliable and grid-connected equipment such as Surge protection, leakage protection, and self-resetting over- and under-voltage protection. The box shell is made of PC (polycarbonate) with a protection level of IP65, which meets the requirements of internal and external installation, and is waterproof, dustproof, UV-proof, acid-proof, alkali-proof, salt spray-proof, and corrosion-resistant; the box is light and easy to carry; at the same time, the box has high sturdiness, impact strength IK08, and long service life.

The photovoltaic grid-connected cabinet can be customized according to the photovoltaic project, and may encounter different requirements and specifications of the power grid in individual regions. It only needs to be adjusted based on the original integrated photovoltaic grid-connected cabinet design.

Precautions for installing photovoltaic grid-connected cabinets

The installation should be carried out under the guidance of qualified technicians.

Please note that it is best to turn off the power and check before installing and operating the junction box.