1. SHARJAH ELECTRICITY & WATER AUTHORITY
2014
By : Asma ali
Hajar Saeed
Hessa elshiba
noura ali
Shaima Juma

2. What is SEWA ?
Sharjah Electricity And Water Authority (SEWA) is the providing services of electricity, water and natural gas to the residents of Sharjah city.
It was established in the 1940
SEWA contain many departments such as :
Electricity and Desalination Plants on Abu Moussa, Wasir Bu Nair and Al Zubair Islands
Khorfakkan Electricity Generation and Water Desalination Plant
Zulal Water Factory
Al Layyah Electricity Generation and Water Desalination

4. Wasit Electricity Generation Plant
Generate electricity only
Contain 6 main departments
Administration department
Operation Room
Planning department
Electrical Maintenance Department (EMD)
Instrument Maintenance Department (IMD)
Mechanical Maintenance Department (MMD)
Two main ways to generate power
Diesel Power Generation
Gas Power Generation.
But other station can do also Steam Power Generation

5. Operation Room or Control

6. Gas Turbine Phases:. Total Power generated =1200 MW Phase 1 Phase 2
GT1, 2, 3
Phase 2
GT 4A,4B
Phase 3
GT 5A, 5B
Phase 4
GT 6A, 6B
Phase 5
GT 7A, 7B
Two Roiss Roiss
Total Power generated =1200 MW

7. Gas Turbine
Two type
Frame 6 (10 compaction unite, Start motor work on diesel)
Frame 9 (14 compaction unite, Start motor work on electrical)
Frame 6
Frame 9

8. Gas Turbine Component: Filter Air dust Axial compressor
filtering the air from humidity and dust
Air dust
clean the air
Axial compressor
Increase air pressure
Combustion chamber
Increase the volume of air by heating it
Turbine
Convert the thermal energy of gases in mechanical energy (as useful work on the rotor)
Generator
generate the power from mechanical to electrical
Step up/ step down transformer
SU increase the power while SD decrease the power.
Starting Device
give power to unit to start

9. Gas Turbine

10. Gas Turbine Elements for turbine running: Cooling Supplying fuel
reduce the temperature of gas
Supplying fuel
Such as gas or diesel
Atomizing air for combustion
Its used to convert the liquid fuel into small drops to go into the CC

11. Gas turbine Starting the turbine:
Electrical motor or diesel engine to start the unit as the routine reach 60% so the combustion chambers are fired.
As the turbine speed is higher than the start engine speed the engine is disconnected and shut down.
As the turbine reach the nominal speed, the unit is ready to be synchronized to the network so the starting is complete and the unit has reach full speed no load (FSNL).

12. Gas turbine Shutting Down: Normal shutdown Emergency shutdown (Trip)
Manually operation by stop switch or some mechanical or regulation problem through protection devices
Emergency shutdown (Trip)
Depressing the emergency stop button or by some mechanical or regulation important problem through special devices.
Trip is for two reason
Human error
Protection
Actual (Ex. problem in the Vibration device)
False (Ex. wrong reading from the Vibration device)

13. Cooling water System 3 1 4 2

14. Cooling water System process
The water is stored in the tank which is distilled water
The motor move the distilled water to two parts.
Generator
Oil temperature cooling and then to the atomizing air cooling
So it will reduce the temperature for the two parts
The water is joined from the two part and then go to the fans.
The fans reduce the water temperature

15. Cooling down This step is Immediately following a shut down
The turbine can be:
Started
loaded at any time during the cooling down cycle.
The rotor is rotated to provide uniform cooling.
prevents rotor from bowing, rubbing and imbalance.

16. Cool down operation: Start up : cool down on.( + execute).
auxiliary oil pump AOP stars ( checks oil pressure 7 bar)
lube oil heater pressure 1.3 bar.
cooling water pump start ( pressure 4 bar).
jacking oil pressure: bar.
mist eliminator fan starts.
BT fan will start.
check the oil flow in all the view glass

17. Exhaust System The Exhaust systems have a fan.
Exhaust systems are necessary to guide the exhaust flue gases and the toxic gases of the gas turbine into the atmosphere.
It can cause to death.

20. Fire fighting system
Most fires happens because of diesel leaking.

22. Electrical Maintenance Departments (EMD)

23. Generating Sequence F-6 F-9 RR BE TY 2x33MW – 11KV 8x109MW – 15KV
Monitoring Frequency
50 Hz
400 V
230 V

24. Wasit Distribution Network SAJA1 SAJA2 SAJA3 SAJA4 220 KV GT 4B GT 5AX X X X
220 KV X ~ ~ ~ X X X X ~ ~ ~
143 MVA
15/220 KV
282 MVA
302 MVA X X X X IB
220/132 KV
GT 4B
GT 5A
GT 4A
GT 5B
GT 7A
GT 7B
GT 6A
15 KV
100MW
GT 6B
2x75 MVA
15/ 6.6 KV
4MVA
132 KV X X X X X X X X IB
220/33 KV
3x75 MVA
33 KV X ~ ~ X ~ ~ X ~ X X X X X X X X
GT1
30 MW
GT2
30 MW
GT3
20MW
RR1
40MW
RR2
40MW
AZRA
GHFA
RMTA
RMQ
UMKR
Generator
220 KV
132 KV
33KV

26. Electrical => Mechanical Mechanical => Electrical
Motor
Generator
Electrical => Mechanical
Mechanical => Electrical
Consume => Electricity
Produce => Power
Consume => Power
Produce => Electricity

27. Transformers Oil Filed Dry type High capacity Low Capacity
For Volt Transfer

28. Breakers Air circuit breaker Oil circuit breaker Gas circuit breaker
Work by
Air
Oil
Gas
Cost
Low
Medium
Highest
Specifications
Large ( x10 )
Medium ( x2 )
Maintenance required
Low size ( x1 )
No maintenance
Efficient
picture

29. Monitoring
Start up
Protection
Cheap
Monthly Maintenance
Average cost
No Maintenance
Highest cost
Yearly Maintenance

30. CFL (Compact Filament Lamp) LED ( Light Emitting Diode )
Lighting
Filament lamp
CFL (Compact Filament Lamp)
LED ( Light Emitting Diode )
Consumption
100% ( Highest )
40% ( Medium )
10% ( Lowest )
Cost
x1 ( Cheap )
x3 ( Average )
x8 ( Highest )
Picture

31. HDSV (high main sodium vapor) MHL (Metal halide lamp)
Lighting
HDSV (high main sodium vapor)
Yellow
As ,much as its high, it covers more area
LED type
HDMV (Mercury vapor)
- White
- Places where require more lights
MHL (Metal halide lamp)
White
Used at workshops and for study
FTL (fluorescent tube light)
White , yellow
Tube lights

32. Mechanical Maintenance Departments (MMD)

33. Mechanical Maintenance Departments (MMD)
MMD: design and manufacturing, and installation, and operation of the engines, machinery, and manufacturing processes.

34. Gas system operation The two main valves :
GCV: set for gas control valve.
SRV: set for gas ratio valve.
Operation:
Gas come from SAJAA (yellow pipe) and goes directly to SRV & GCV , which take the gas to combustion chamber if they open. If any trip happen they will close and solenoid gas valve open to let the gas which located between them to go to the atmosphere.

35. Torque Converter operation
Two motor to rotate the shaft:
Turbine gear motor (88TG – 1, Turning gear)
Cranking motor (88CR– 1)
The torque converter transfer the speed from left side shaft to the right side shaft, if the left is running in 1000 rpm then the right should run at the same speed.
Inside the torque converter there is two main things that transfer the speed between the motors
Solenoid valve turbine unit (20TU – 1)
Limit switch turbine control (33TC – 1)
Both this thing are operate using oil wine the oil pass throw them they are connected and the operation starts.

36. Torque Converter

37. IGV operation
IGV located before the compressor it take the air from filter and send 100% pure air which has no dust or moisture for compressor. If the IGV open with 34 degree it has zero loads (zero speed) the turbine not rotating. When the degree reaches 56 degree the chamber is firing this mean that it’s full speed with 3000 rpm.

38. IGV operation

39. Instrument Maintenance Departments (IMD)

40. Instrument Maintenance Departments (IMD)
IMD: reading the valves from the Gages
is a converter that measures a physical quantity and converts it into a signal
Sensors that detect the presence of operators near hazardous machines of facilitates.
measure temperature by correlating the resistance of the RTD element with temperature.
Measure the temperature
How many rpm
Detect the level of the valve
Indicate the position of the valve
Detect the gas

41. GCV and SRV instruments
Solenoid valve fuel gas control (20FGC – 1)
SRV
Solenoid valve fuel gas start (20FGS – 1)
Solenoid valve gas (20VG – 1)
Release the gas that is between SRV & GCV
Pressure Transmitter fuel gas
To detect the gas pressure
96FG – 2A
96FG – 2B
96FG – 2C

42. Load Dispatch Center (LDC)
Supervise control and data equation

43. Fiber optic
definition
Advantage
The medium and the technology associated with the transmission of information as light impulses along a glass or plastic wire or fiber.
Fiber optic cables have a much greater bandwidth than metal cables. This means that they can carry more data.
Fiber optic cables are less susceptible than metal cables to interference.
Fiber optic cables are much thinner and lighter than metal wires.
Data can be transmitted digitally (the natural form for computer data) rather than analogically.

44. RTU (Remote Terminal Unit)
definition
types
an electronic device that is controlled by a microprocessor.
The device interfaces with physical objects to a Distributed Control System (DCS) or Supervisory Control and Data Acquisition (SCADA) system by transmitting telemetry data to the system.
PDH (Plesiochronous digital hierarchy) 2 Mbps
telecommunications network transmission technology designed for the transport of large data volumes across large scale digital networks.
PDH uses ( E1) channels in Europe and Mb/s ( DS1) channels in the US and Japan.
Each E1 = 64Kbps

45. RTU (Remote Terminal Unit)
types
SDH’s benefits over the pdh
SDH (Synchronous Digital Hierarchy)
standard technology for synchronous data transmission on optical media. It is the international equivalent of Synchronous Optical Network.
Synchronous Transport Modules (STM)
STM-1 (155 Mbps) = 63*E1
DWDM (Dense wavelength division multiplexing)
Reduce costs
world standard digital format
synchronous structure is flexible
Easy traffic cross connection capacity and add and drop facility

46. SCADA (Supervisory Control and Data Acquisition)
definition
A category of software application program for process control, the gathering of data in real time from remote locations in order to control equipment and conditions
Used to monitor and control a plant or equipment in industries such
telecommunications
water and waste control
energy
oil and gas refining and transportation
SCADA systems include hardware and software components.
The hardware gathers and feeds data into a computer that has SCADA software installed.
The computer then processes this data and presents it in a timely manner.
SCADA also records and logs all events into a file stored on a hard disk or sends them to a printer.
SCADA warns when conditions become hazardous by sounding alarms.

47. Personal Protection Equipment (PPE)