The short-circuit impedance tester is an essential tool in the power industry, used to detect and assess the performance and condition of transformers. The following are its main applications in the power industry:
1. Transformer Factory Testing
Quality Control: After a transformer is manufactured, the short-circuit impedance tester is used to measure the transformer’s short-circuit impedance, reactance, resistance, and other parameters to ensure they meet design and manufacturing standards.
Winding Deformation Detection: By measuring the short-circuit impedance, it is possible to determine whether the windings have been deformed or displaced. If there is a significant deviation between the measured short-circuit impedance value and the design value or factory value, it may indicate that there is a problem with the windings during the manufacturing process.
2. Acceptance Testing After Transformer Installation
Installation Quality Verification: After a transformer is installed, the short-circuit impedance tester is used to verify whether the installation process has caused any damage to the windings.
Ensuring Normal Operation: By testing the electrical performance of the transformer with the short-circuit impedance tester, it can be confirmed whether the transformer meets the required standards, avoiding equipment failures caused by improper installation.
3. Regular Maintenance of Transformers in Operation
Condition Monitoring: The short-circuit impedance tester is used to regularly inspect transformers in operation to detect winding deformations, looseness, or insulation aging in a timely manner.
Preventive Maintenance: By comparing historical data, the health status of the transformer can be assessed, and maintenance or replacement can be scheduled in advance to prevent sudden failures that could cause power outages.
4. Transformer Fault Diagnosis
Testing After Short-Circuit Impact: When a transformer has been subjected to a short-circuit current impact, the short-circuit impedance tester can quickly determine whether the windings have been deformed or damaged.
Fault Location: By measuring the short-circuit impedance of different windings, the location of the fault can be preliminarily determined, providing a basis for repair.
5. Testing After Transformer Retrofitting
Assessing Retrofit Effect: After a transformer has been retrofitted or overhauled, the short-circuit impedance tester is used to check its electrical performance to ensure that the transformer meets the new technical requirements.
Verifying Winding Condition: By testing the short-circuit impedance, it can be confirmed that the windings have not been damaged during the retrofitting process, ensuring the safe operation of the equipment.
6. Power System Safety Assessment
Equipment Health Assessment: The results of the short-circuit impedance test are an important indicator for assessing the health of a transformer and provide data support for the safe operation of the power system.
Risk Warning: By regularly testing and analyzing data, potential safety hazards can be detected in advance, reducing the risk of power system failures.
7. Certification and Acceptance of Power Equipment
Conformity Testing: During the certification process of power equipment, the short-circuit impedance test is an important part of verifying whether the transformer meets relevant standards.
Acceptance Testing: After the purchase and installation of power equipment, the short-circuit impedance tester is used for acceptance testing to ensure that the equipment meets contractual requirements.
8. Optimization and Upgrading of Power Systems
Equipment Selection: When upgrading or retrofitting a power system, the short-circuit impedance test results can be used to assess the performance of existing transformers and provide references for the selection of new equipment.
System Optimization: Based on the results of the short-circuit impedance test, the operating parameters of the power system can be optimized to improve the stability and reliability of the system.
9. Retirement Assessment of Power Equipment
Retirement Decision: Before a transformer is retired, the short-circuit impedance test is used to assess its condition and determine whether it can continue to operate safely.
Asset Disposal: The results of the short-circuit impedance test provide a basis for the disposal of retired transformers, ensuring the safe dismantling and recycling of the equipment.