What Are the Protection Functions of the Inverter?

Inverter as a PV power generation system within the important electrical equipment. The equipment itself is equipped with various types of protection functions are more complete, specifically the following basic protection functions:

1、Grid over/under-voltage over/under-frequency protection: when the voltage and frequency are too high or too low, reaching the threshold value required by the relevant regional grid-connected standard, the inverter will quickly trigger the protection action to enter into the shutdown state until the grid parameters return to normal, and then the inverter will restart the work automatically again;

2、 Input reverse protection: When the positive and negative poles of the input terminal are reversed, the inverter should have protection function and display;

3、lightning protection: distributed photovoltaic system for lightning protection design, first of all need to consider the erection of lightning rods to prevent direct lightning damage to the photovoltaic power station, but also must be considered to prevent lightning induction and lightning wave invasion of inverters and distribution boxes and other electrical equipment;

4、Instantaneous overcurrent protection: It is used to stop the inverter operation instantaneously and cut off the current when the current flowing through the inverter electric appliance back piece reaches abnormality, such as short circuit on the load side of the inverter current;

5、Over-temperature protection: when the temperature inside the equipment rises to a specified value, the inverter can detect the abnormality and reduce the output power or stop the inverter electric work;

6、 Overload protection: inverter output current exceeds the rated value, and the continuous flow of more than a specified period of time, in order to prevent damage to the inverter devices, wires, etc., the equipment stops running.

7、Anti-islanding protection: the inverter has the ability to quickly monitor the islanding and immediately disconnect from the grid, the protection action time should be no more than 2s, while issuing warning signals.

In addition to the above protection functions. Solar Inverter as the core equipment in the photovoltaic power generation system, the electronic components, power devices, electrical devices, PCB circuit boards, etc. used in it need to be carefully taken care of to ensure a long service life, which requires outdoor inverters to achieve a high level of protection.

With the accelerated development of distributed photovoltaic, the industry has put forward higher requirements for the safety, system efficiency and intelligent operation and maintenance of photovoltaic power plants. As the “core” of the whole power station, PV inverter will inevitably develop towards more safety, higher power density, more MPPT precision and more intelligent.

Follow ADAYO POWER website, getting more information about solar energy.