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HOME > PRODUCTS > ON-LINE CONTINUOUS MONITORING |
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Monitoring System |
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| Generator Diagnostics Monitor |
Introduction
Integrated Generator Condition Monitoring System
:Stator/Rotor winding insulation, Stator vibration and Air-gap diagnostics
It is an on-line integrated diagnostic monitoring system for large hydro and turbine generators. It consists of Stator partial discharge monitoring system, Rotor shorted-turn monitoring system, Stator vibration monitoring system and Air-gap & Winding impedance monitoring system. Stator partial discharge monitoring system measures the partial discharges generated from the insulation deterioration in the stator winding and Rotor shorted-turn monitoring system keeps track of the change in the rotor flux signal caused by the shorted-turn ratio and Stator vibration monitoring system analyzes the frequency spectrum of the stator vibration caused by weakening of fastening the mechanical parts and Air-gap & Winding impedance monitoring system monitors the change in air-gap capacitance and winding impedance caused by the stator electromagnetic asymmetry.
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Features
1. Insulation condition of Stator winding
- Measures and analyzes the partial discharge generated from the defects in the stator winding insulation
2. Insulation condition of Rotor winding
- Analyzes the change in the rotor flux
3. Looseness of Stator mechanical parts
- Analyzes the frequency spectrum of the stator vibration
4. Electromagnetic asymmetry
- Monitors the phase current, voltage and neutral current
- Monitors the air-gap by the air-gap capacitance
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| System configuration |
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| Specification |
| NO. |
Item |
Description |
| 1 |
PD channels (A/B/C/N) |
12 |
| 1-1 |
Frequency band |
0.5 ~ 10 MHz |
| 1-2 |
Dynamic amplitude range |
70 dB |
1-3 |
Power frequency phase resolution
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7.5° |
2
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Noise channel |
1 |
| 3 |
Flux channel, AG-20 |
1 |
| 4 |
Air-gap channels, AIR-S |
2 |
| 5 |
Temperature channels, RTD |
3 |
| 6 |
Humidity channel, Hm |
1 |
| 7 |
Vibration channels, V |
2 |
| 8 |
Current channels, I A/B/C |
3 |
| 9 |
Voltage channels, U A/B/C |
3 |
| 10 |
Data memory |
64 MB |
| 11 |
Communication interface |
USB / RS-232 / RS-485 |
| 12 |
Communication protocol |
Modbus RTU |
| 13 |
Output relay |
2 (Status / Alarm) |
| 14 |
Power supply |
100~240 VAC, 50/60 Hz |
| 15 |
Operating temperature |
-40℃ ~ 50℃ |
| 16 |
Dimensions |
270×170×35 mm |
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| Monitoring methods |
| NO. |
Monitoring Item
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Method |
| 1 |
Insulation condition of the stator winding
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- Measures and analyzes the partial discharge generated from the defects in the stator winding insulation |
| 2 |
Insulation condition of the rotor winding |
- Analyzes the change in the rotor flux |
| 3 |
Looseness of the mechanical parts |
- Analyzes the frequency spectrum of the stator vibration |
| 4 |
Electromagnetic asymmetry |
- Monitors the phase current, voltage and neutral current
- Monitors the air-gap by the air-gap capacitance |
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| Sensor types |
| NO. |
Monitoring Item
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Method |
Q'ty |
| 1 |
Insulation condition of the stator winding
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- Coupling capacitor, CC
- RFCT sensor, RFCT-4
- RTD PD sensor, DRTD-3 |
3
1
3 |
| 2 |
Insulation condition of the rotor winding |
- Flux sensor, AG-20 |
1 |
| 3 |
Looseness of the mechanical parts |
- Vibration sensor, DV-2 |
2 |
| 4 |
Electromagnetic asymmetry |
- Current sensor, IFCT-5
- Air-gap sensor, SL-50 |
3
2 |
| 5 |
Ambient temperature and humidity |
- Temperature sensor, Pt-100
- Humidity sensor |
1
1 |
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