With the continuous development of photovoltaic energy storage technology, photovoltaic energy storage integrated power station has gradually become a new form of energy utilization. In the photovoltaic energy storage integrated power station, the 800V to 380V transformer is a very important equipment, which is used to convert high-voltage direct current into low-voltage alternating current to meet the power demand of the load side. This article will introduce the characteristics, working principle, technical parameters and selection of 800V to 380V transformers in photovoltaic energy storage integrated power stations.
1. Features. 1.High efficiency and energy saving: Adopting advanced power electronics technology and magnetic circuit design, it has the characteristics of high efficiency and energy saving, low noise and low loss.
2.Intelligent control: The intelligent control system can realize remote monitoring, automatic control and other functions to improve operation efficiency and management level.
3.Multiple protection: It has multiple protection functions such as overvoltage, undervoltage, overload, short circuit, etc., to ensure safe and reliable operation.
4.Easy installation: compact structure, small size, light weight, easy to install and maintain.
Second, the working principle.
The 800V to 380V transformer is a step-down transformer, which works by using the principle of electromagnetic induction to convert 800V DC into 380V AC power. Specifically, when 800V DC power passes through the primary winding of the transformer, a magnetic field is generated in the primary winding, and this magnetic field is induced into the secondary winding, which generates a voltage in the secondary winding. Since the transformer has a conversion ratio of 2, the voltage in the secondary winding is 380V.
3. Technical parameters and selection.
1.Technical parameters.
1) Input voltage: 800V DC;
2) Output voltage: 380V alternating current;
3) Rated capacity: selected according to the actual load capacity;
4) Frequency: 50hz;
5) Waveform: Sine wave;
6) Efficiency: 95%;
7) Insulation grade: F grade;
8) Ambient temperature: -40 +45.
2.Lectotype. When choosing an 800V to 380V transformer, the following factors need to be considered:
1) Actual load capacity: select the rated capacity of the transformer according to the actual load capacity, and it is generally recommended to leave a certain margin.
2) Installation environment: select the structural form and protection level of the transformer according to the installation environment.
3) Operational stability: Consider the operational stability of the transformer, including the selection of multiple protection functions such as overvoltage, undervoltage, overload, and short circuit.
4) Ambient temperature: Choose the appropriate insulation grade and protection level according to the ambient temperature.
IV. Conclusions. The 800V transformer in the photovoltaic energy storage integrated power station is a very important equipment, which is used to convert high-voltage direct current into low-voltage alternating current to meet the power demand of the load side. When selecting and using 800V to 380V transformers, it is necessary to consider factors such as actual load capacity, installation environment, operation stability, and ambient temperature to ensure its safe and reliable operation and high efficiency and energy saving.