What to do if the transformer overvoltage trips

With the rapid development of industrialization and the popularization of electrification, transformers, as important power equipment, bear the important task of transmitting and distributing electric energy. However, transformers also face various problems, one of which is overvoltage. In actual power grid operation, transformer overvoltage tripping occurs from time to time due to various reasons such as supply voltage and load. This article will introduce the causes, prevention and treatment methods of transformer overvoltage tripping from the following aspects to help us better protect transformer equipment and maintain the stability of power supply.

1. Analysis of causes of overvoltage

1. The load is too light or the load changes suddenly

When the load is too light or the load changes suddenly, the transformer output voltage It will rise accordingly, and if it rises to a certain level, it will cause an overvoltage trip.

2. Abnormal input voltage

Abnormal input voltage is one of the most common causes of transformer overvoltage. If the input voltage is too high, the output voltage of the transformer will also be too high, causing overvoltage tripping.

3. Poor grounding equipment

If the transformer grounding equipment is poorly connected or the grounding resistance is too large, overvoltage tripping will occur if there are other faults or the grid voltage fluctuates.

4. Cross-border operation

In cross-border operation, the voltage level may not match the region of operation, and it is difficult to simulate possible input voltage fluctuations, which will also Cause overvoltage trip.

2. Preventive measures

1. Active power regulation

Transformer active power regulation can stabilize the output voltage by adjusting the transformer input voltage. For transformers with good load characteristics, the active power regulation method can be selected.

2. Design in advance

During the design stage of the transformer, the characteristics of the load, input voltage fluctuations and characteristics of the operating area should be taken into consideration in advance, and corresponding protection measures should be set.

3. Maintenance

After each maintenance, the grounding equipment, insulation status, cooling system, switch transmission mechanism, etc. should be maintained and should be strictly followed during use. operation to avoid operational errors that may lead to overvoltage.

4. Limiting grid overvoltage

Limiting grid overvoltage is also one of the effective measures to prevent overvoltage tripping. Use reasonable power equipment to limit the input voltage and keep it within the specified voltage range.

3. Emergency measures

1. Quick power outage

If the transformer overvoltage trip has occurred, a quick power outage should be carried out immediately to avoid further safety incidents and damage to electrical equipment. Emergency personnel should follow procedures for quickly shutting down power.

2. Check electrical equipment and circuits

After a power outage, the equipment and wiring of the transformer and peripheral circuits should be checked in order to determine the cause of the overvoltage and repair it. And test the repaired transformer to ensure its normal use.

3. Find the cause of the fault

For overvoltage tripping accidents, they should be carefully analyzed to find the cause of the fault, so that corresponding measures can be taken to prevent similar accidents from happening.

4. Restart operation

If after checking the equipment and peripheral circuits, it is found that the problem has been solved, the operation should be restarted according to the procedure and tested to ensure that it is normal. use.

In short, for the problem of transformer overvoltage tripping, we should dig out the cause and take effective preventive and treatment measures to ensure the safety of equipment and working environment. At the same time, we should also strengthen the management and maintenance of power equipment, improve its reliability and service life, and provide guarantee for power supply and power demand.