VAA Winding Vibration Monitoring System
VAA Winding Vibration on-line monitoring system of the main mission is to state control scheme determination winding transformer core and the rest of the force between tighten. The conclusion is to work through determination of the state of transformer in 24 kinds of vibration signal analysis (2 groups and each measured 12 channel that the vibration signal). Every certain cycle all need to do some experiments, at least every three years need to do it a second time. In the transformer, winding through the powerful short-circuited the shortcircuit current need to do after test.
benefit:
• Use this when transformer don't need power outages, meaning can directly to the work of the transformer diagnosis;
• Can on any type of filling of transformer oil to tighten force, without special matching diagnosis;
• Estimated transformer service life;
• Can embed experts diagnosis system automatically created reports.
• Vibration sensor with 20 m connecting cables of the piezoelectric mechanical vibration tester, equipped with magnetic firmware can quickly installed in transformer the housing;
• Transformer vibration signal input components;
• According to the DAQ card coding the vibration signals of the board-700 into a portable computer PCMCIA slot;
• Requirements: computer processor; No less than P100, memory: no less than 16 MB; Screen resolution: no less than 600 x 800 pixels. The computer is not included in VAA within the system;
• Used for vibration signal processing and automatic evaluation transformer parts of the situation VAA tighten force expert system, the software system installed in expert software on a portable computer, support Windows 95 and higher version of the operating system.
| Monitoring objects | 5-1000 MVA oil-immersed transformer |
| Installation | Magnetic buckle installation |
| Installation position | Shell top or bottom transformer |
| Sensor type | The piezoelectric mechanical vibration instrument |
| Measure frequency | 10-1000 Hz ac |
| Sampling points | 12 |
| Be measured transformer conditions | Low load or load and carrying two kinds of situations |
| Data Display | Graphical interface |