Power System Maintenance

Course Description

Basic terms and definitions. Failure cause. Maintenance strategies and types. Maintenance strategy selection. Maintenance planning and management. Activity preparation as crucial point of maintenance. System checking during maintenance. Periodic maintenance scheduling. Service life. Costs analyses. Characteristics of maintenance results. Optimal number of reserving components. Repair. Replacement. Maintenance based on legislative. Historical data and statistics. Significance of maintenance in respect on technical limits. Maintenance activity. Results of total productive maintenance. Long-term purpose of maintenance. Maintenance and quality. Maintenance in open market environment. Maintenance information system. Testing techniques. Component monitoring. Technical data acquisition and diagnosis. Damage identification, types and estimation. Reports.

General Competencies

Understanding role and methods of electric power system maintenance. Understanding relationship between facilities maintenance and power system operation based on technical and economic requirements. Ability to determinate most important maintenance factors of electric power systems (costs, periods, damages, ...).

Learning Outcomes

  1. differentiate based terms as: deteriorating, damage, fatigue of material, defect etc.
  2. list and explain defect couses in electric power system
  3. list and define maintenance strategies
  4. plan and manage equipement maintenance
  5. create maintenance line diagrams
  6. analyze maintenance costs
  7. use the optimization tool GAMS
  8. write maintenece report

Forms of Teaching


Two hours weekly.


Continuously: one writing exam, final exam (writing and oral examination) and two short tests. Classical Exam: writing and oral examination at the end of semester. Results of two short tests are included.


One hour weekly.


For the seminar.


Electric power system elements maintenance sheduling by using of software package GAMS.

Grading Method

Continuous Assessment Exam
Type Threshold Percent of Grade Threshold Percent of Grade
Quizzes 0 % 6 % 50 % 6 %
Seminar/Project 0 % 14 % 50 % 14 %
Mid Term Exam: Written 50 % 25 % 0 %
Final Exam: Written 50 % 25 %
Final Exam: Oral 30 %
Exam: Written 50 % 50 %
Exam: Oral 30 %

Points of Short tests and Seminar will be admit in the Exam.

Week by Week Schedule

  1. Basic terms and definitions. Failure cause. Weather influence, equipment construction limits, inadequate monitoring, load variations, other causes.
  2. Maintenance function. Maintenance strategies and types. Corrective maintenance. Preventive maintenance. Risk-based maintenance. Condition-based maintenance. Terotechnological maintenance. Logistic maintenance. Examples on electric power systems elements.
  3. Maintenance. Total productive maintenance. Reliability based maintenance. Knowledge based maintenance (Expert systems). Self maintenance. Examples.
  4. Maintenance strategy selection. Maintenance characteristics. Maintenance organization. Central maintenance. Transmission transformer station example. Dispersed maintenance. Distribution transformer station example. Combined maintenance. Distribution line example. Maintenance outsourcing. Transmission line example.
  5. Maintenance planning methods. Line graphs. Examples. Methods for network planning. Examples. Maintenance organization. Maintenance software's.
  6. Periodical equipment testing. Visual examination. Cleaning, smudge elimination and painting. Lubrication and replacing. Equipment starting, operation and conditions testing. Equipment characteristics testing. Cleaning to prevent . Distribution transformer station example.
  7. Periodic maintenance scheduling. Examples. Optimal number of reserve parts. Repairs. Service life. Equipment lifetime.
  8. Maintenance cost. Cost type. Influence of maintenance cost on final product price (electric energy price). Cost analyses. Cost center. Cost control. Maintenance cost estimation. Cost management. Cost monitoring. Cost savings. Cost planning. Cost strategy. Total costs. Examples.
  9. Damage types and estimation.
  10. Introduction to matehematical programming. Decision making procedures. Lagrange multipliers. Benders decomposition.
  11. Application of linear programming on maintenance scheduling problems in power systems. Mathematical model formulations. Optimal maintenance scheduling of power system elements.
  12. Introduction to optimisation software GAMS. Examples.
  13. Long term maintenance scopes. Maintenance information system.
  14. Influence of open electric power market. Transmission system maintenance. Generation system maintenance. Distribution elements maintenance. Examples.
  15. Documentation and maintenance reports. Testing methods. Data acquisition. Data analysis. Damage identification. Diagnosis concepts. Diagnosis.

Study Programmes

University graduate
Electrical Power Engineering (profile)
Recommended elective courses (3. semester)


M. Shahidehpour (2000.), Maintenance Scheduling in Restructured Power Systems, Kluwer Academic Publishers, Boston, USA
P. Gill (2009.), Electrical Power Equipment Maintenance and Testing, CRC Press - Taylor&Francis Group, LLC, Boca Raton, USA
F.A. Sturm (2003.), Efficient Operations - Intelligent Diagnosis and Maintenance, VGB PowerTech Service GmbH, Essen, D
K. Harker (1998.), Power System Commissioning and Maintenance Practice, The Institution of Electrical Engineers, London, UK
I. Čala (1999.), Inženjerski priručnik 4, svezak 3, poglavlje 9., Održavanje opreme, Školska knjiga, Zagreb



ID 86490
  Winter semester
L1 English Level
L1 e-Learning
30 Lectures
15 Exercises
0 Laboratory exercises
0 Project laboratory

Grading System

90 Excellent
80 Very Good
70 Good
60 Acceptable