220kv GIS Maintenance and Operation (1)
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Transcript of 220kv GIS Maintenance and Operation (1)
© 厦
门A
BB
华电
高压
开关
有限
公司
- 1
-
01-1
0-26
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Training ELK-14252kV GIS
Contents
SF6 Properties
Advantages of GIS
ABB GIS Products
ELK-14
GIS Operation
GIS Maintenance
Sulphur hexafluoride SF6
The properties
Inert, non-toxic
Electro-negative (electron-capturing)
Six times heavier than air
Global Warming
SF6 as Quenching Medium
Ionization temperature of SF6 is lower than air
In SF6 the radial temperature gradient in the arc is very steep
Excellent arc quenching property Low arc diameter
Low arc temperature
Only very small gas blast needed
Radial temperature profile in electric arcs
SF6 as Insulating Medium
Pressurized at 300 kPa (3 bar) SF6 insulates better than oil
Pressurized at 400 kPa (4 bar) SF6 insulates 6 times better than air at normal pressure
In SF6 the GIS field configurations are homogenous
Ball-plate-arrangement, 50 Hz ac
12.5 mm ball, 12.5 mm distance
HV - GIS: The compact substation solution
Advantages:
Reduced Space System planning with high flexibility Best for novel, creative solutions More sites available Power distribution on HV level Reduced transmission losses Fully metal-enclosed, safe Prefabricated, factory-tested units Fast installation
ABB GIS product portfolio
Encapsulation
Reted voltage(kV)
Rated power frequency withstand voltage (kV)
Rated lighting impulse withstand voltage (kV)
Rated current (A)
Rated breaking current (kA)
Three-phase
170 550
325 740
750 1550
3150 4000
50 6340
145
275
650
2500
800
960
2100
5000
50
GIS-Type ELK-0 ELK-3ELK-04 ELK-4
300
460
1050
4000
63
ELK-14/300ELK-14/252
252
460
1050
3150
50
Three-phase Three-phase with single-phase
Single-phase Single-phase Single-phase
ABB GIS Focus Factories In Europe
ABB Factory “Hanau-Großauheim“Scope of activities:Development, Manufacturing, Engineering and Sales Support
Output:GIS up to 170kV
ABB Factory “Oerlikon-Zürich“Scope of activities:Development, Manufacturing, Engineering and Sales Support
Output:GIS from 170kVup to 550kV
Another ABB GIS Focus Factory In Xiamen, China
ABB Factory “Xiamen, China“( Founded In 1999 with current production of 1,000 bays / year.)
Scope of activities:Development, Manufacturing, Engineering and Sales Support
Output : GIS up to 550kV
ELK-14 / 252kV
CB & Operating Mechanism
Disconnector & Earthing Switch
CT & VT
Connecting Elements
Local Control Cubicle
Modules:
Circuit Breaker (50 kA)
ELK-14 CB Operating Mechanism - HMB4
ELK-14 CB Operating Mechanism - HMB4
Advantages of HMB-4Advantages of HMB-4
Long service life and high reliability
Less maintenance and minimum wear
Easy checking and inspection
Low noise level
No external piping, reduced chances of oil leak
Extremely compact design
Flexibility of use
In comparison with spiral springs: Disk springs have much higher mechanical
strength Higher energy storage density No ageing of mechanical characteristics
during service Flat F-S characteristic, more suitable for
switching operations of CB
Force
Stroke
Characteristic of spiral spring
Characteristic of disc spring
Energy
CB Mechanism HMB
Integrated Current Transformer
Voltage Transformer
Combined Disconnecting and Earthing Switch
Fast Acting Earthing Switch
Three pole operated (one drive) Most compact 3-phase design Spring remains uncharged after close-operation
Density Monitor
Functional diagram
SF6 Gas Monitoring
CB
Other Compartments
Filling Pressure
Alarm Pressure
Blocking Pressure
220 kV GIS Engro Energy Power Plant
D:\Pakistan Engro Qadirpur 220kV drawings\Primary drawing\01 Single line & Diagram\Single line & Diagram_1HZ0000004_B gas diagram (1).pdf
GIS Operation
Local inspection in GIS room
Alarm annunciation
Gas density monitor
LOGO
Hydraulic pump counter of CB drive
Counter of CB
Oil level in CB drive
Local Control Cubicle (LCC)
1. Alarm annunciator2. Local/Remote control3. LOGO 4. Interlocking/release switch5. Push button6. Position indicator
1
2
3
6
5
4
Alarm Annunciator
Interlocking/Release Switch
Using this switch to release the interlocking condition one must be very CAREFUL.
After energizing please put the Interlock/Release and Local/Remote control key in safe place by authorized person.
Manual operation of Disconnector and Earthing switch-ELK-14
Adjust position
Insert crank
1. Interlocking magnet in each DES
2. Crank opening
3. padlock
12 3
Manual operation of Fasting Earthing Switch
1. Padlock
2. Crank opening
3. Interlocking magnet
Manual operation of Disconnector and Earthing switch-ELK-14
Any question, Please see operation manual for more detail description.
ABB GIS maintenance plan
Daily inspection
First time after 1 year
Second time after 5 year
Third time after 8 year
Overhaul based on its health condition
Maintenance
Maintenance-first time
After one year’s operation
Gas pressure
Local Control Cabinet
Manual operation of DES,FES
Visual inspection of CB drives
Maintenance-second time
After 5 year
Check the gas pressure
Dew point testing
Local Control Cabinet
Remote control
Insulation of the secondary control cable
Manual operation of DES,FES
Visual inspection of mechanism
CB characteristic
Primary DC resistance
Maintenance-third time
After 8 year
Check the gas pressure Check the density monitor
Dew point testing
Local Control Cabinet
Remote control, check the remote signal and protection
Insulation of the secondary control cable
Manual operation of DES,FES
Visual inspection of mechanism
CB characteristic
Primary DC resistance
Check the earthing
High voltage testing optional
Overhaul
Overhaul is based on health condition of GIS
CB: Short circuit current(50KA) 10 times or normal operation more than 5000 times
Inner fault flashover abnormal voice
Gas leakage that can not be solved unless disassembly;
Other reasons
Finding and dealing with usual problems
1. Low SF6 pressure Low SF6 pressure alarm/density monitor
Report to ABB and fill SF6; Seek for leakage position Solved by ABB
2. Loss of hydraulic oil inside CB drive Oil level indicator (glass window).
Report to ABB Seek for leakage position Solved by ABB (if serious, maybe need power off)
3. OthersABB will provide professional support when you need
and Please contact with ABB as soon as possible
Gas Tightness and Moisture Test
Gas leak Seeker
Dew Point Test Instrument
SF6 Gas Refilling Device
1. VK/F-02/20 Coupling Tongue Part DN20
2. VK/F-02/8 Coupling Tongue Part DN8
Kind advice
For any maintenance work inside the enclosure of GIS, please contact ABB as all work should be under
ABB’s supervision
Power and Productivity for a better World