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What is the fault diagnosis and elimination method of dry type transformer?
Date:2023-12-22
Dry type transformer is a common power transformer. The compressor may have various faults during operation. Accurate diagnosis and timely troubleshooting for the protection of transformer. The normal operation of the device and the extension of its service life are essential. Next, Xuzhou Pengcheng Electric Co., Ltd. will introduce the dry change. The fault diagnosis and removal method of the compressor.
The appearance inspection is a basic step, the purpose of which is to check whether the transformer housing, cooling system, leads and insulators are normal. It mainly includes the following aspects:
Check the surface of the shell for paint removal, rust, cracking and other conditions;
Check cooling fan, air duct and fin for blockage, deformation or damage;
Check the connection and insulation of the leads;
Check the surface of the insulator for contamination or breakage.
Insulation resistance measurement Insulation resistance measurement is an important means to judge the insulation status of the transformer, but also an effective way to find insulation defects. The insulation resistance tester is usually used to measure the insulation resistance of the transformer, and is compared with the standard requirements. Determine whether the insulation is qualified according to the measurement result. If the insulation resistance is lower than the standard value, there may be problems such as insulation damage or aging of insulation materials.
Winding measurement Winding measurement is an important method to evaluate the internal insulation state of the transformer and its damage degree. Common parameters of winding measurement include winding resistance, insulation capacitance and interphase short-circuit resistance. The measurement result is compared with the standard value, and the contact, insulation and short circuit of the winding can be judged.
Cooling system inspection Cooling system is an important part of dry transformer to maintain normal operation. In troubleshooting, it is necessary to check the air duct, fan, and fin of the cooling system. The inspection contents mainly include the following aspects:
Check whether the air duct is blocked;
Check whether the fan runs normally;
Check that the fins are clean and undamaged.
The arrester is an important equipment to protect the internal insulation of the transformer, and it is also one of the components prone to failure in the dry-type transformer. In the inspection, you need to pay attention to the following aspects:
Check the appearance of the arrester for damage or dirt;
Check whether the arrester connection leads are normal;
Measure the insulation resistance of the arrester to determine whether there is insulation damage and other problems.
Partial discharge detection Partial discharge is one of the important bases for judging the insulation state of the transformer. By partial discharge detection, you can know whether there is partial damage in the insulation system, and evaluate the quality of insulation. The commonly used partial discharge detection methods include ultrasonic detection and partial discharge measurement.
When the transformer fails, the insulating material will produce gas, and the gas analysis can determine the status of the insulation system by detecting and analyzing the gas and its content inside the transformer. Common gas analysis methods include chromatography, electrochemical analysis and so on.
The above are some basic methods of dry-type transformer fault diagnosis and elimination. It should be noted that fault diagnosis and removal should be carried out by professionals and carried out in accordance with relevant standards and specifications. In actual operation, it is also necessary to consider a variety of factors, such as the design of the transformer, the load situation, the environment, etc., to ensure safe and efficient diagnosis and troubleshooting, and ensure the normal operation of the transformer.
The appearance inspection is a basic step, the purpose of which is to check whether the transformer housing, cooling system, leads and insulators are normal. It mainly includes the following aspects:
Check the surface of the shell for paint removal, rust, cracking and other conditions;
Check cooling fan, air duct and fin for blockage, deformation or damage;
Check the connection and insulation of the leads;
Check the surface of the insulator for contamination or breakage.
Insulation resistance measurement Insulation resistance measurement is an important means to judge the insulation status of the transformer, but also an effective way to find insulation defects. The insulation resistance tester is usually used to measure the insulation resistance of the transformer, and is compared with the standard requirements. Determine whether the insulation is qualified according to the measurement result. If the insulation resistance is lower than the standard value, there may be problems such as insulation damage or aging of insulation materials.
Winding measurement Winding measurement is an important method to evaluate the internal insulation state of the transformer and its damage degree. Common parameters of winding measurement include winding resistance, insulation capacitance and interphase short-circuit resistance. The measurement result is compared with the standard value, and the contact, insulation and short circuit of the winding can be judged.
Cooling system inspection Cooling system is an important part of dry transformer to maintain normal operation. In troubleshooting, it is necessary to check the air duct, fan, and fin of the cooling system. The inspection contents mainly include the following aspects:
Check whether the air duct is blocked;
Check whether the fan runs normally;
Check that the fins are clean and undamaged.
The arrester is an important equipment to protect the internal insulation of the transformer, and it is also one of the components prone to failure in the dry-type transformer. In the inspection, you need to pay attention to the following aspects:
Check the appearance of the arrester for damage or dirt;
Check whether the arrester connection leads are normal;
Measure the insulation resistance of the arrester to determine whether there is insulation damage and other problems.
Partial discharge detection Partial discharge is one of the important bases for judging the insulation state of the transformer. By partial discharge detection, you can know whether there is partial damage in the insulation system, and evaluate the quality of insulation. The commonly used partial discharge detection methods include ultrasonic detection and partial discharge measurement.
When the transformer fails, the insulating material will produce gas, and the gas analysis can determine the status of the insulation system by detecting and analyzing the gas and its content inside the transformer. Common gas analysis methods include chromatography, electrochemical analysis and so on.
The above are some basic methods of dry-type transformer fault diagnosis and elimination. It should be noted that fault diagnosis and removal should be carried out by professionals and carried out in accordance with relevant standards and specifications. In actual operation, it is also necessary to consider a variety of factors, such as the design of the transformer, the load situation, the environment, etc., to ensure safe and efficient diagnosis and troubleshooting, and ensure the normal operation of the transformer.
