How To Maintain The Power System

Where there is a power system, there is a need to install relay protection device, which can ensure that the power system runs more safely and efficiently, and help to prevent the loss caused by power system failure. However, due to our demand for greater operating efficiency of the power system, the pressure of relay protection devices is increasing, and it is easy to fail, so how can we maintain the power system? Next,GDZXwill introduce it for you.

If you want to strengthen the operation and maintenance of the relay protection, you must understand the characteristics of the relay protection device first, so that it can meet the basic operation requirements. The main characteristics of the relay protection device are as follows:

1. Reliability

The reliability characteristic of the relay protection device is its main characteristic feature. In case of fault during the operation of the power system, the relay protection device will make reliable action on the fault within its protection range and effectively disconnect the expansion of the fault point.

2. Selectivity

In case of power system operation failure, the relay protection device will selectively cut out the failure, disconnect the switchgear closest to the failure point in time, effectively prevent the expansion of the failure, so that other parts except the power system failure part can continue to operate normally. Sensitivity. The sensitivity of the relay protection device can be measured by the over sensitivity coefficient, which means that it is within the protection range Ability to respond to abnormal conditions or operational failures.

3. Rapidity

In case of system failure, the relay protection device can react at the fastest speed allowed, disconnect the switchgear in time to ensure that the fault does not spread and expand, which also plays a good role in reducing the damage degree of fault components, and lays a foundation for the realization of safe and stable synchronous operation of the power system after the fault is removed.

In order to improve the reliability of relay protection, effectively guarantee the safety and stability of power system operation, and timely make reliable actions in case of fault, it is necessary to regularly check and verify the relay protection device and its secondary circuit. The verification contents of the relay protection device mainly include the inspection of the whole group of actions of the protection device, the electrical characteristic test and the mechanical part of the relay Inspection, secondary power on test, opening voltage and secondary circuit insulation resistance measurement.

The main inspection contents of relay protection device and its secondary circuit are to ensure the complete, effective and reasonable preservation of protection setting list, to ensure that the relay is normal, to check whether the power supply and LCD panel and indicator light display of relevant devices and equipment are normal and accurate, to check whether the AC sampling and message and input of the device are normal, to check the position of transfer switch and pressing plate, and to ensure that There is no abnormal smell or sound during operation.