AMoS Advanced Total On-line Monitoring & Diagnosis System for GIS PAMoS Portable GIS Partial...
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AMoS Advanced Total On-line Monitoring & Diagnosis System for GIS
PAMoS Portable GIS Partial Discharge Diagnosis System
www.psdtech.com
Contents
1. PAMoS
Portable GIS Partial Discharge Diagnosis System
2. Noise Processing Technology
3. Ahn Kang Hydrelectric Power Plant 330kV GIS
Partial Discharge Diagnosis
www.psdtech.com
1.PAMoS
Portable GIS Partial Discharge Diagnosis System
www.psdtech.com
50 Ω50 Ω50 ΩImpedance
Link N-Type connector
> - 11 dBm ( 79 μW)
0.5 ~ 1.5 GHz
< 2 pC
GIS Indicating window
embedded sensor
Link N-Type connector
-22 dBm (6 μW )
0.5 ~ 1.5 GHz
< 5 pC
Open Barrier type Spacer
external sensor
< 5 pCsensitivity (pC)
Metal closed barrier-type spacermounting method
0.5 ~ 1.5 GHzfrequency range
Link N-Type connector
-24.4 dBm (3.6 μW )
items
cable connection method
sensor output(5pC)
Internal Internal External External ExternalExternal
UHF PD SensorUHF PD Sensor
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Item Contents
Input voltage AC 90~240V
Min. detection signal < - 60dBm (= 0.001μW)
Over voltage protection
Built-in surge protector
Input channel4 Channel/Unit (simultaneous, consecutive
measurement)
Communication TCP/IP (IEEE802.x)
Processor Dual 600 MHz DSP
Filter User selection ( 3 steps )
Gating Enable to select Multi-Channel
EMC Adopt Industrial Emission Standard
PAMoSPAMoS
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1. Connect the power cable of the Main body of PMAoS and Notebook computer
2. Connect the TCP/IP LAN cable between the Main body and Notebook computer
3. Connect the UHF Sensor and Noise sensor to PMAoS with coaxial cable
4. When the connection is ready, turn on the power switch and check LED lamp is on (red: power lamp, yellow: communication lamp)
5. When lamp is on, Connection is ready .
PAMoS Operation and
connection methods
Notebook PCNotebook PC
LAN CableLAN Cable
Power Switch Power Switch
Power CablePower CableCoaxial CableCoaxial Cable
Noise SensorNoise SensorExternal UHF PD SensorExternal UHF PD Sensor
PD Signal Processing UnitPD Signal Processing Unit
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Floating Electrode - no free moving Protrusion Electrode
Form of general partial discharge inside GIS (examples)Defect Type
Free Moving Particle Defective Insulator
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2. Noise Processing Technology
1) 4-step Noise elimination mothod 4-step Noise elimination method PRPS algorithm
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1. Spacer shielding1. Spacer shielding
Band pass filter with selectable frequency rangeShield Noise to Spacer
2. Filter Matrix2. Filter Matrix
Noise-processing technology (4-step)1
0 500 1000 1500 2000-110
-100
-90
-80
-70
-60
-50
-40
600 700 800-110
-100
-90
-80
800 900 1000
-110
-100
-90
-80
-70
-60
Po
we
r m
ea
sure
d (
dB
m)
Frequency (MHz)
Direct Filtered
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3. Gating Method3. Gating Method
Gating On
Gating Off A Phase
B Phase
C Phase
Noise
A Phase
B Phase
C Phase
Noise
Internal UHF PD sensor
Noise Antenna
Noise only
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Gating OnGating Off
PD Data + Noise PD Data
PRPS - patented
PRPD
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4. Neural Network4. Neural Network
Real-time comparison with DB Library and analysis, remote upgrading SW Real-time comparison with DB Library and analysis, remote upgrading SW
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0 cycle 120 cycle ( 2 sec) 240 cycle 360 cycle 480 cycle 10 Seconds Consecutive measuring Data / 60Hz
600 cycle ( 10 sec)
PRPS Analysis
Store 10 seconds consecutive data : determine PD existence via overlapped consecutive signal analysis
PRPD
Not PDNot PD
PDPD
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3. Ahn Kang Hydroelectric Power Plant 330kV GIS
Partial Discharge Diagnosis
www.psdtech.com
1. PD Measuring Point1. PD Measuring Point
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2. Noise Measuring Point2. Noise Measuring Point
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3. Diagnosis Result ( 3302-B bay ( examples ) )3. Diagnosis Result ( 3302-B bay ( examples ) )
PD Sensor Noise Sensor Noise Gating result
Monitoring the signal inside GIS and the external noise signal by using Band Pass Filter
Applying noise gating function to each monitored signal
Eliminating with gating the internal signal by the external noise signal
Identifying the incoming internal signal by the external impulse noise
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THANK YOU !!THANK YOU !!