Learn the inverter structure in the solar power system

Solar power is an inexhaustible source of electricity from nature, bringing many benefits to life and production. It gradually replaces the national grid power with features of safety, savings and environmental friendliness. To install a solar power system requires many different parts, an indispensable device is the inverter. Let's learn about this inverter device through the article below.

Inverter, also known as inverter, is an important device in the solar power system, used to convert direct current (DC) generated from the solar power system into alternating current.

Inverter inverters have different types based on the shape of the converted waveform. Inverter technology can control the device's capacity to avoid energy loss, thereby significantly saving power consumption.
 

Inverters (Inverters) have many types to help convert the right current, see the 3 popular types of inverters below:

The micro inverter is responsible for converting the DC electricity produced by a single panel to which it connects. With the advantage of self-calibrating the maximum power for each solar panel, it is safe and highly flexible in installation and use. Easy to maintain and repair each solar module. However, this type of micro-inverter has a rather high price and a more complicated installation process than other types.

This type of string inverter is common in solar installations. They have a flexible, cost-effective design with a relatively low investment. The string inverter is a large device located far away from the system of panels. You can monitor and monitor the system remotely, but they do not have a maximum power point correction mode for each battery panel.

This type of inverter is used for large solar panels, used for lighting large areas such as stadiums, industrial production areas... This type of inverter has low cost but high efficiency. high usage results. When it is necessary to install in a large area, the central inverter type is the most suitable choice.

The purpose of using the inverter is to convert the DC current in the solar panel to AC current to supply current for electrical equipment to operate. Depending on the type of inverter, there will be a number of different changes, but they share some basic structures as follows:

An electrical device that converts alternating current (AC) or periodically reverses the direction of DC current flowing in one direction.

Is the path of direct current: electric wire

Also known as AC Reactor. A coil of wire wound around a steel core. The AC reactor helps to reduce noise on the input AC current. It acts as a filter to protect the input rectifier circuit from noise and collision caused when switching loads.

Also known as DC Reactor. It is attached to the inverter before the capacitor. The function is that the bus is stabilized, has a large reserve of energy to prevent input voltage drop, and reduces the noise back to the source caused by the inverter.

As a device that converts a DC current source into an alternating current with a variable frequency, IGBT power module: for measuring high resolution, high accuracy, can measure the voltage of devices using DC power.

Will help the inverter to discharge or brake the excess energy caused by the motor to become a generator, the voltage is returned to the DC bus. This energy will puncture the DC bus and cause an explosion of the IGBT, the charging capacitor if not suppressed by the braking resistor (brake resistor).

To use solar energy for electrical equipment, an inverter is indispensable. These are fully automatic devices as they are pre-programmed to convert DC current to AC. There are several types of inverters with common capacities such as 5KW, 8kW, 3kW, 10KW… When considering a solar power system, one of the important decisions that you make is finding the right inverter type. Best.