Calculation of power transformers health index trends

1.

Calculation of power transformers health index trends:
One of the modern requirements for the operation of the
electrical equipment.
Danila Kazykhanov
Power engineer
Gazprom transgaz Surgut
Preparation for internships for young workers at Gazprom production facilities in 2025, Saint Petersburg, April 2nd 2025

2. The modern requirements for the operation of the gas compressor station equipment

Optimal Power Output Range Of Gas Turbines (The Range of 25 to 42MW
ensures optimal performance)
Environmental Standards (Complies with modern environmental regulations)
Automatic Operation (Enhances convenience and reduces human error)
Modern
requirements
Reliability (Ensures consistent performance and minimal downtime)
Energy Efficiency (High efficiency reduces fuel consumption and emissions)
Maintainability (Facilitates easy and cost-effective maintenance)
Operation Based On Condition Assessment (Operates based on real-time
technical assessments)
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Calculation of power transformers health index trends: One of the modern requirements for the operation of the electrical equipment.

3.

History of the emergence of the need for operation of electrical equipment based on
condition assessment
55th annual meeting of chief power engineers
of Gazprom subsidiaries
from June 3 to June 7, 2024
Volgograd
3
Resolution of the Government of the
Russian Federation of December 19,
2016 N 1401
«On the comprehensive determination of
indicators of the technical and economic
condition of electric power facilities,
including indicators of physical
deterioration and energy efficiency of
electric grid facilities, and on the
implementation of monitoring of such
indicators»
Calculation of power transformers health index trends: One of the modern requirements for the operation of the electrical equipment.

4.

The benefits of moving from planned preventive maintenance (PPM) to conditionbased maintenance (CBM)
Амурский
ГПЗ
Planned preventive
maintenance
(PPM)
4
Condition-based
maintenance
(CBM)
Calculation of power transformers health index trends: One of the modern requirements for the operation of the electrical equipment.

5.

The concept of health index (HI)
Амурский
ГПЗ
5
Health Indices (HI)
represent a practical method
to qua the results of
operating observations, field
inspections, and site and
laboratory testing into an
objective and quantitative
index, providing the overall
health of the assets.
Calculation of power transformers health index trends: One of the modern requirements for the operation of the electrical equipment.

6. Statistics of transformer failures and defective components

connection
11%
maintenance
9%
moisture
5%
overload
4%
others
2%
insulation
15%
electrical
29%
lighthing
25%
Causes of transformer failure
6
relay
5%
LTC
40%
core
5%
tank
6%
bushing
14%
winding
30%
Defective transformer components
Calculation of power transformers health index trends: One of the modern requirements for the operation of the electrical equipment.

7. The power transformation health index trends and required actions

90
Good
Normal maintenance
Medium
Increase diagnostic testing,
possible remedial work or
replacement needed depending
on criticality
80
Health index
70
60
50
40
Bad
30
20
Immediately assess risk;
Very bad replace or rebuild based
on assessment
10
0
29
7
Start planning process to
replace or rebuild
considering risk and
consequences of failure
30
31
32
Operating time /Year
33
Calculation of power transformers health index trends: One of the modern requirements for the operation of the electrical equipment.

8. Conclusion

The health indexing method quantifies the condition of transformers based on various criteria related to long-term degradation
factors and also and helps to make the required decisions
The proposed method considers both theoretical aging process
es and actual operating conditions, providing a more comprehen
sive assessment of transformer health.
The use of multi-criteria analysis and various parameters, such
as oil quality and load history, allows for a more accurate health
index calculation.
In the future, new types of health indices may be developed
using different methods and algorithms, but the main challenges
will remain in data optimization and the objectivity of the methods
. health index trends: One of the modern requirements for the operation of the electrical equipment.
Calculation of power transformers
Conclusion
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9.

THANK YOU FOR YOUR ATTENTION
Danila Kazykhanov
Tel. 8 (951) 977-66-14
E-mail: kazyhanovdd@surgut.gazprom.ru
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Calculation of power transformers health index trends: One of the modern requirements for the operation of the electrical equipment.