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Posted in: Nigeria Electricity & Gas Improvement Project (NEGIP) Projects
Assignment Title: Technical Assistance for Engineering Supervision and Site Management of Construction, Reinforcement and Rehabilitation of Grid Substations.
Credit No: 46200 UNI
The Federal Government of Nigeria has received a credit facility from the International Development Association (IDA) under the World Bank towards the cost of Nigeria Electricity and Gas Improvement Project (NEGIP) and intends to apply part of the proceeds of this credit to payments under the contract for Consultancy Services for Technical Assistance for Engineering Supervision and Site Management of Construction, Reinforcement and Rehabilitation of Grid Substations.
Reference No.: QCBS – NGP-TC-17
Date Posted: 2016-03-09 11:51:50
(ToR) for Training of TCN Field Engineers
TERMS OF REFERENCE (TOR)
For
Engagement of Consultant for Training of some selected Field Engineers in Transmission Company of Nigeria (TCN)
Project Management Unit (PMU)
Transmission Company of Nigeria (TCN)
No. 10, Kunene Close, Off Bobo Street,
Off Gana Street, Maitama, Abuja.
March, 2020
1.0 INTRODUCTION
The Federal Government of Nigeria, through the Transmission Company of Nigeria (TCN) is taking steps to improve the quality and reliability of electricity supply within the country and other customers outside the country while striving to ensure the sustainability of the entire operations of the electricity industry. This is aimed at boosting economic activities through availability of reliable energy to power homes and business activities and to bridge the gap in the demand for electricity required by the huge commercial activities in the immediate environs of the selected project locations. As part of measures to achieve this objective the Federal Government of Nigeria, on behalf of TCN has received a credit facility from the International Development Association (IDA) under the World Bank towards the cost of the Nigeria Electricity Transmission Project (NETAP). TCN therefore intends to apply part of the proceeds of this credit for payments of Consultant under the contract titled Training of Field Engineers in Transmission Company of Nigeria (TCN).
2.0 PREAMBLE
The System Operators’ duties are to monitor grid resources, perform switching and exercise such control and dispatch functions as are required to facilitate stable and reliable supply system. In order to maintain the transmission grid integrity, they are required to function effectively in team setting with the maintenance group.
Maintenance engineer, on the other hand, would require accurate reporting and first hand analysis of events and equipment performance by the Operator to enable him undertake accurate assessment of failures. Thus, a veritable ground for interface has to be established such that the latter would be suited to perform his role in a manner that appropriately complements the former.
Lines Maintenance technician/engineer should be knowledgeable in transmission circuit calculations, location of fault on power system networks and line maintenance procedures.
This calls for a renewed strategy in capacity building. This Training scheme is to introduce the young electrical engineers in TCN to wide ranging competencies critical to transmission system maintenance, operations and management.
What does a maintenance engineer do?
- Planning and undertaking scheduled maintenance.
- Responding to breakdowns.
- Diagnosing faults.
- Repairing equipment.
- Supervising engineering and technical staff.
- Obtaining specialist components, fixtures or fittings.
- Maintaining statistical and technical records.
- Design maintenance strategies, procedures and methods
- Carry out routine maintenance work and respond to equipment faults
- Diagnose breakdown problems
- Fit new parts and make sure equipment is working correctly
- Carry out quality inspections on jobs
- Liaise with client departments, customers and other engineering and production colleagues
- Arrange specialist procurement of fixtures, fittings or components
- Control maintenance tools, stores and equipment
- Monitor and control maintenance costs
- Deal with emergencies, unplanned problems and repairs
- Improve health and safety policies and procedures
- Work with specialist equipment, such as programmable logic controllers (PLC), which control machinery on factory assembly lines
- Write maintenance strategies to help with installation and commissioning guidelines
- Ensure there is continuous cover of the machinery and equipment in case of breakdowns
3.0 PROGRAM OBJECTIVE
To introduce the young electrical engineers to the wide-ranging competencies critical to effective and efficient operations, maintenance and management of the ever expanding and increasingly sophisticated power grid network bearing in mind that most of these Engineers have prior to now receive one form of training or the other.
At the end of the course, participants should be able to analyze, design and apply Directional and Distance protection schemes and perform Shot Circuit Analysis.
Participants should also be able to assess transformer and switchgear performance, Lines maintenance, carry out inspections and rudimentary maintenance checks; undertake inspections of power system auxiliary equipment and advise on performance.
4.0 PROGRAM STRUCTURE
TCN have nine (9) Regions, they are Bauchi, Kaduna, Abuja, Shiroro, Benin, Osogbo, Enugu, Lagos and Port-Harcourt.
This program aims at training the Maintenance Engineers in those Regions to enable them perform their functions as expected.
The Engineers to be trained are those of the Protection, Control and Metering (PC&M), Electrical Maintenance Departments (EMD) and Lines Maintenance Departments(LMD).
The Trainers will spend two (2) weeks in each of the nine Regions and the training of the three Departments will run concurrently. In fact, depending on the number of facilitators the training can hold in two or three regions at the same time.
The trainers are to bring their test equipment but use TCN machineries for demonstration purpose. The program is expected to consist of about 30% class work and 70% demonstration.
At the end of the exercise a few Engineers that have shown outstanding performance would be drawn from all the regions to be trained on more advanced topics and they will constitute a task team that could be called upon in times of dire need.
5.0 PROPOSED COURSE MODULES/SCOPE OF ASSIGNMENT:
- Module 1- Relaying Principles and Applications. - 2Wks
- Module 2- Transformers, Switchgears & Auxiliary Systems - 2Wks
- Module 3- Advanced Protective Relaying and Metering - 2Wks
- Module 4- Advanced Transformer and switchgear Maintenance and Testing - 2Wks
- Module 5- Line Maintenance Training – 2Wks
All TCN Maintenance Engineers in PC&M are expected to participate in Module 1 and all EMD Engineers are to participate in Module 2 Training. Module 3 and 4 are for the few outstanding Engineers from PC&M and EMD respectively that will be trained centrally.
MODULE - 1
Title: Relaying Principles and Applications
Target Audience: Electrical Engineers & Technologists that are responsible for the Maintenance, Testing and Calibration of Protection and control equipment that protects Transmission lines, Transformers, Buses, and Feeders. The participant should have basic knowledge of AC/DC electricity.
Venue: Regional Headquarters
Duration: Two Weeks
No of Participants: 198 in 9 Regions (Averagely 22 per Region)
Objective: At the end of the course, participants should be able to analyze, design and apply power system protection schemes. The training will cover proper relay maintenance, specific test procedures, and detailed adjustment and calibration procedures utilizing state-of-the-art relay test sets
Content:
- Principles of Relaying Protection
- Control Circuits (AC & DC)
- Fault/Short Circuit Study & Analysis
- Relay Setting & Co-ordination
- Power Transformers protection Connections
- Principles of Instrument Transformers, Testing and terminations.
- Philosophy of Differential Protection
- Basics of Generator Protection
- Transformer Protection
- Basic Line Protection
- Auto-reclosing Schemes
- Over voltages & Surge Protection
- Fuses & Fuse Co-ordination
- Basic System Stability Studies
- System/Equipment Grounding.
- Maintenance, Testing and Recalibration of Relays
- Grid and Commercial Metering
- Electrical Interlocking.
- Maintenance of Battery Chargers.
Delivery Methodology: Lectures; Practical Demonstrations
MODULE - 2
Title: Transformers, Switchgears & Auxiliary Systems
Target Audience: Electrical Engineers & Technologists that are responsible for Erection, Maintenance and Testing of high voltage substations equipment (Transformers, Reactors, Capacitor banks, Circuit breakers, Isolators, Instrument Transformers and surge arresters), Battery Banks, Substation earthing and Auxiliary supply.
Venue: Regional Headquarters
Duration: two Weeks
No of Participants: 260 in 9 Regions (Averagely 29 per Region)
Objective: Participants should be able to assess transformer and switchgear performance, carry out installation, maintenance and testing; undertake inspections of power system auxiliary equipment and advise on their performance. Participants will understand applicable testing standards.
Content:
- Classes of Transformers
- Transformer Operation
- Transformer Design & Construction
- Maintenance of Transformers
- The Principles and Practice of Reliability-Centered Maintenance Management
- Types of Switchgears (Circuit Breakers and Isolators)
- The Essence of Switchgears
- Switchgear Operations
- Switchgear Design & Construction
- Switchgear maintenance
- Batteries
- Battery Maintenance Check-list
- Grounding and Bonding
- Surge Arresters maintenance and testing
- Station Auxiliaries
- Transformer Pre-commissioning and commissioning Test and procedures
Delivery Methodology: Lectures; Practical Demonstrations
MODULE - 3
Title: Advanced Protective Relaying and Metering - 2Wk
Target Audience: Electrical Engineers & Technologists who exhibited an outstanding performance in Module 1 and are responsible for the testing, maintenance and calibration of relays that protect Transmission lines, transformers, buses, and loads.
Prerequisites:
Basic knowledge of protection technology
Venue: Regional Headquarters
Duration: Two Weeks
No of Participants: 40No
Objective: At the end of the course, participants should be able to analyze, design and apply Directional and Distance protection schemes and perform Short Circuit Analysis. Relay maintenance, specific test procedures including impedance reach testing, and detailed adjustment and calibration procedures utilizing state of the art relay test equipment. Participants will understand applicable testing standards, what test result information should be recorded, and what hand tools are necessary for proper relay adjustment and calibration.
Content:
- Principles, operations and maintenance of Directional Relays
- Principles, operations and maintenance of Distance Relays
- Advanced Transformer Protection
- Fault/Short Circuit Study & Analysis
- Harmonic Analysis
- Solid State Relay Maintenance
- Microprocessor Based Relay Maintenance
- Advanced System Stability Studies
- Tele-protection
- Telemetering
- Busbar Schemes and Protection of Busbars
- Protection of Shunt Reactors and Capacitor Banks
- Pilot Wire Protection
- Principles, operations, setting and maintenance of Directional relay
- Principles, operations, setting and maintenance of Distance relay
- Load Flow Analysis
Delivery Methodology: Lectures; Practical Demonstrations
MODULE - 4
Title: Advanced Transformers, Switchgears & Auxiliary Systems
Target Audience: : Electrical Engineers & Technologists who exhibited an outstanding performance in Module 1 and are responsible for Maintenance and Testing of high voltage substations equipment (Transformers, Reactors, Capacitor banks, Switchgears, substation earthing, and substation auxiliaries.
Prerequisites:
Basic knowledge of transformers, switchgears, earthing and substation auxiliaries.
Venue: Regional Headquarters
Duration: two Weeks
No of Participants: 40No
Objective: Participants should understand the components of power transformers, including common insulating and cooling mediums, and explains common transformer configurations, transformer testing, transformer oil testing, switchgear performance, carry out inspections and rudimentary maintenance checks; undertake inspections of power system auxiliary equipment and advice on their performance. The participants should be able to carry out accurate substation earth testing. Participants will understand applicable testing standards.
Content:
- Advanced Power Transformer Maintenance and Testing.
- International Standards and guidelines
- Sweep Frequency Response Analysis
- Liquid Insulation Analysis (Dissolved Gas Analysis)
- Circuit Breaker Standard and Rating
- SF6 Circuit Breaker Characteristics
- Live Tank and Dead Tank SF6 Circuit Breakers
- Sf6 Circuit Breaker Maintenance and Testing
- Introduction to Gas Insulated Switchgear (GIS)
- GIS maintenance
- Batteries Maintenance according to IEEE and ANSI Standards.
- Cable Fault Location and Tracing.
- Cable Splicing and Terminating, High Voltage.
- Perform and analyze Withstand Tests (DC, AC & VLF)
- Perform and analyze Diagnostic Field Tests (Tan Delta & PD)
- Auxiliary Supply Voltages
- Time Domain Reflectometer
Delivery Methodology: Lectures; Practical Demonstrations
MODULE - 5
Title: Lines Maintenance
Target Audience: Electrical Engineers, Technologists and Technician those are responsible for Erection/Maintenance of Towers, location of fault along transmission line, testing of high voltage substations equipment
Venue: Regional Headquarters
Duration: two Weeks
No of Participants: 250 in 9 Regions (Averagely 28 per Region)
Objective: Participants should be able to assess the causes of system collapse, transmission circuit calculation, fault location on power system network, carry out line maintenance and testing; undertake line patrol and treatment of hot spot. Participants will understand applicable testing standards.
Content:
- Transmission Circuit calculations
- Introduction to power system in Nigeria
- Introduction to transmission network
- Causes of system collapse
- Calculation of power loss on transmission line etc
- Type of conductor and loading effect
- Calculation of stress, strain and factor of safety for materials
- Fault location on power system network
- Fault location techniques/methods
- Calculation methods for fault locator (Distance protection relay)
- By testing equipment
- By protective relaying
- Line maintenance procedures
- Line patrol procedures: ground patrol, helicopter patrol, tower inspection and their importance
- Safe climbing practice; climbing precautions
- Fundamental of grounding; grounding precautions and ear thing of overhead lines
- Introduction to line rigging
- Definition of line rigging
- Tension on straight-line conductor
- Bisect tension on an angle structure
- Combined force on conductor under tension
- Knots, bends, hitches and splices
- Substation and line earthing
- Temporary groundings
- Earthing materials
- Earthing impedance
- Radial and mesh counterpoise
- Relationship between spike, sky wire and counterpoise in line protection
- Hazard voltage tolerable limit
- Line patrol work
- Type of patrol
- Corrosion treatment using Zig-ger
- Treatment of hot spot
- Replacement of insulator
- Amendment of loss conductor
- Handling other fittings
- Emergency patrol
- Handing of lines tools
- Safety Practices in TCN
- Safety manuals in TCN-Editions and development;
- Started protection Codes(SPC)
- Rules 201 Series
- Rules 101 Series
- Definition of electrical apparatus and terms
- Periodic Inspection and tests
- Use of correct tools
- Use of Permit and Tags
- Safety manuals in TCN-Editions and development;
- Vegetation issues and Right of Way (ROW)
- Trace clearing and his advantages
- Trace maintenance outside ROW
- Practical experience on community issue
- Preventive maintenance
Delivery Methodology: Lectures; Practical Demonstrations
6.0 CONSULTANT’S QUALIFICATIONS
The prospective Consultant should be a consulting firm with at least 10 years’ experience in the training of power utilities engineers and ability to demonstrate in practical terms using electricity transmission facilities. Examples of similar assessments in training of power utilities staff and references shall be submitted as part of the proposal.
Other key personnel required for the assignment are listed in the table below:
S/N | Key Personnel | Required No. | Qualification | Experience |
1. | Specialist in Transformer Maintenance for Modules 1 & 3 | 1No | Minimum Academic Qualification of First Degree in Electrical Engineering and relevant field | At least 15 years’ experience in Transformer Maintenance in at least 330kV voltage level |
2. | Support staff for Modules 1 & 3 | 2No | Minimum Academic Qualification of First Degree in Electrical Engineering and relevant field | At least 10 years’ experience in Transformer Maintenance in at least 330kV voltage level |
3. | Specialist in Switchgear for Modules 2 & 4 | 1No | Minimum Academic Qualification of First Degree in Electrical Engineering and relevant field | At least 15 years’ experience in Transformer Maintenance in at least 330kV voltage level |
4. | Support staff for Modules 2 & 4 | 2No | Minimum Academic Qualification of First Degree in Electrical Engineering and relevant field | At least 10 years’ experience in Transformer Maintenance in at least 330kV voltage level |
5. | Specialist in Transformer Maintenance for Modules 5 | 1No | Minimum Academic Qualification of First Degree in Electrical Engineering and relevant field | At least 15 years’ experience in Transmission Line Maintenance in at least 330kV voltage level |
6. | Support staff for Modules 5 | 2No | Minimum Academic Qualification of First Degree in Electrical Engineering and relevant field | At least 10 years’ experience in Transmission Line Maintenance in at least 330kV voltage level |
7.0 DURATION OF WORK AND REPORTING
- Duration
This assignment shall be completed within a period of twenty (20) weeks commencing immediately after contract signing.
- Reporting
The Consultant shall report to the nominated TCN Training Coordinator for all information in regards to this assignment.
- Responsibilities of the Client
In addition to the training supervisory and other responsibilities contained in this assignment, the client shall provide the Consultant with the following stations documents:
- Relevant Station documents
- Training Hall in all the nine (9) Regions
- Tea break and Lunch
- Training bags for participants in all the nine (9) Regions
- Vehicles to convey both the Facilitators and Test equipment to the nine (9) Regions.
- Required machineries for demonstration purposes
- Responsibilities of the CONSULTANT
In addition to the responsibilities of the Consultant as contained in this assignment, the Consultant shall also provide the following:
- Provision of all test training equipment.
- Training materials for participants in all the nine (9) Regions.
- DELIVERABLES
At the end of the training, the Trainers/Consultants are to submit a comprehensive report to the Management of TCN both in soft and hard copies in which they are expected to clearly defined the Work functions of PC&M Department, Electrical Maintenance Department as well as Lines Maintenance Department and recommend list of Test equipment for the three Departments that will be required for effective maintenance.
- SELECTION METHOD
Consultant shall be selected through the Quality and Cost Based Selection (QCBS) in accordance with the procedures set out in the World Bank’s “Procurement Regulations for IPF Borrowers” July 2016, revised November 2017 and August 2018.
12.0 COPYRIGHT AND OWNERSHIP
All raw and finished materials would be owned and copyrighted. Permission to use materials by the Consultant for other projects shall require the written permission of the Employer, and the Consultant shall maintain in strict confidence all information received from the Employer concerning imports, financial records and nature of the business.
Engr. Dahiru A. I
"Our major drive is to key into the change mantra of Mr. President's in ensuring that the power sector can deliver quality and uninterrupted power supply to citizens of the country"
- the Project Manager TCN-PMU
