Common faults of power transformers: Tap changer fault
Writer： Hengfeng you electric Time：2023-04-20 views：times
Power transformer is a static power equipment that changes the magnitude of AC voltage, and is one of the core equipment in the power system. In the process of energy transmission and distribution, power transformer is the core of energy conversion and transmission, and is a necessary path for various industries and households in the national economy to source energy.
If a transformer malfunctions, it will affect the safe and stable operation of important equipment in the power system. Once an accident occurs, it will cause significant economic losses. Hengfengyou Electrical Engineer analyzes various power transformer accidents, identifies the causes, summarizes methods for handling accidents, and minimizes accident losses to minimize damage to the system.
Common faults are surface melting and burning, discharge of interphase contacts or discharge of various joints. The main reasons are:
(1) Loose connection screws;
(2) Poor and improper adjustment of the load adjustment device;
(3) Poor insulation of the tap insulation board;
(4) Insufficient soldering of the joint, poor contact, poor manufacturing process, and insufficient spring pressure;
(5) The high acid value of the oil causes corrosion on the contact surface of the tap changer.
Due to the fact that main transformer accidents are generally not single, but multiple and developing, and the potential main fault points are relatively hidden, coupled with the particularity of the fault nature. Therefore, in order to ensure the safe and stable operation of transformers and power grids, and to handle accidents correctly, we should always grasp the following situations:
① System operation mode, load status, and load type
③ Weather conditions at the time of the accident;
④ Is there any maintenance or other work around the transformer;
⑤ Whether the operating personnel have operated;
⑥ Is there any operation in the system;
⑦ What kind of protective action, accident situation, etc. Strengthen the inspection and supervision of transformer operation, carry out routine maintenance work, timely eliminate equipment defects, conduct regular maintenance and preventive tests, try to avoid transformer accidents and reduce the damage of accidents to the power grid and electrical equipment.
The safe operation management of transformers is the focus of our daily work. By summarizing the experience of analyzing abnormal operation and common faults of transformers, it will be beneficial to timely and accurately determine the cause and nature of faults, and take effective measures in a timely manner.
To ensure the safe operation of equipment, transformers are extremely important electrical equipment in the transmission and distribution system. According to the operation and maintenance management regulations, transformers must be regularly inspected in order to timely understand and grasp the operation status of transformers, take effective measures in a timely manner, and strive to eliminate faults in the bud, thus ensuring the safe operation of transformers.
Hengfengyou is a professional electrical company specializing in the production, manufacturing and sales of electrical distribution products, mainly engaged in the production and global sales of
distribution transformers,
rectifier transformers,
electric furnace transformers, etc. We have provided OEM / ODM services for customers in Europe, America and the Middle East for 20 years. It can provide customized production of transformer core, transformer coil and transformer shell. Hengfengyou Electric will provide you with the best electrical product solutions. https://www.hengfengyou.com ； info@hengfengyou.com WhatsApp：+86158 5325 2696（Jack） +86158 5326 5269（Alisa）
