CEB Presentation 2073
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Transcript of CEB Presentation 2073
• Sathruwan P.C
• Department of Electrical and Information Engineering
• University of Ruhuna
Industrial Training Presentation
From 04th January 2016 to 24th March 2016
CEYLON ELECTRICITY BOARD
Introduction to CEB Transmission Operation and Maintenance – Galle System Control Center Transmission and Generation Planning Branch Project and Heavy Maintenance Section – DD4 C.E.B. Southern province branch Laxapana power station Lakvijaya power station
Presentation Outline
Introduction To Ceylon Electricity Board
Major Divisions
Generation Transmission Distribution
Vision“Enrich Life through Power”
Mission“To develop and maintain an efficient, coordinated and economical system of electricitysupply to the whole of Sri Lanka, while adhering to our core values”.
Benefits of Effective Recruiting Introduction To Ceylon Electricity Board
Generation Transmission
Distribution
Transmission Operation and Maintenance - Galle
Matara Grid Substation 132 kV/ 33kV , 31.5 MVA Transformers The whole Grid Substation can be divided
into Line bay, Transformer bay and Feeder bay 4 Lines 12 Feeders
Transmission Operation and Maintenance - Galle
Transformer Protection
Electrical
Differential Protection
Restricted Earth Fault Protection
Over Voltage/ Under Voltage protection
Over Fluxing Protection
Mechanical
Buchhoz Relay
Winding and Oil Temperature
Oil level
Tank Pressure
High voltage transformers Current transformers voltage transformers Circuit breakers Surge arresters Isolators Wave traps Earth Switch Control panels Protection panels
Frequency controlling (1% tolerance from 50Hz) Voltage controlling Release lines and machines for maintenance Economic Dispatch of Thermal power plants
System Control Center
System operation priority Water usage priority Spinning Reserve Maximum generation unit System voltages
Major functions
System operation policy
Pond Balancing
Release lines and plants for maintenance
Transmission and Generation Planning Branch
Main objectives are find out the transmission developments and future Tx network.
To ensure reliable and stable power system and determine the investment requirement for the
transmission development within the planning horizon
PSS/E software is used to load flow analysis.
Generation Planning
Transmission Planning
The main function of the generation planning division is to prepare the Long Term Generation Expansion Plan (LTGEP). Demand forecasting is done for four sectors. They are ,
1.Domestic 2.Industrial 3. Commercial 4. Other
Transmission and Generation Planning Branch
Domestic 37%
Religious 1%Industrial 34%
General 27%Street Lighting 1%
Domestic | Industrial | Commercial | Other
Project and Heavy Maintenance – DD4
Major Functions Substation Maintenance Tower Line Construction and Maintenance
1. Hot line inspection 2. Preparing estimates 3. Hot line maintenance 4. Cold line maintenance
Replacing of flashover insulators & hardware. Replacing of corroded steel parts Re-tensioning of conductors. Re-conducting of conductors.
Repairing of stubs. Re-concreting of tower foundation Crimping midspan joints,T- off joints & repair sleeves. Applying of anticorrosive paint on towers. Re-fixing of number plate, phase plates etc.
SINGLE CIRCUIT
LOW
MEDIUM
HIGH
TERMINAL
DOUBLE CIRCUIT
HIGH
MEDIUM
HIGH
TERMINAL
SINGLE CIRCUIT
LOW
MEDIUM
HIGH
TERMINAL
DOUBLE CIRCUIT
HIGH
MEDIUM
HIGH
TERMINAL
Tower Type
MAST TYPE TOWER TYPE
Project and Heavy Maintenance – DD4
C.E.B. Southern province – DD4 Distribution Constructions Distribution maintenance Call centre Area office
Types of Poles
1. Reinforced Concrete Poles (RC poles) 2. Pre-Stressed Concrete Poles (PS poles) 3. Wooden Pole
Conductors Poles Conductor accessories Protection devices
DDLOLBS (load break switch)ABS(air break switch)
C.E.B. Southern province – DD4
Laxapana Power Station
Pond Balancing Single Phase transformers in both O/L and N/L O/L- 9.5 MW *3 + 12.5 MW*2 ( Horizontal axis Pelton Turbine) N/L - 57.5MW *2 (Vertical axis Pelton ) O/L - N/L - Excitation Systems
1. O/L (Stage1) and N/L – Brushless 2. O/L (Stage2) – Brush system
Pelton – High heads Francis – Medium heads Kaplan –Low heads
Lakvijaya Power Station
Coal-Thermal power plant900 MW – 3 * 300MW220kV transmission linesDistributed Control System (DCS)Gas Insulated Switching Yard (GIS)
Conclusion
Thank You