Method of controlling a tap changer of a transformer
US5821716A · kind A · utility
14Cited by
3References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 29, 1996 |
| Grant date | Oct 13, 1998 |
| Priority date | — |
| Expiry date | Jul 29, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/147
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A tap-changer transformer operated by the step-by-step principle in which its motor drive receives a signal to raise or lower the tap, has a voltage regulator in which the switching delay times and sensitivity values are freed matrix-like the respective tap changes. The actual voltage value of the transformer is compared with the preselected voltage setpoint and, based upon the control deviation, a value pair of delay and sensitivity are read out. This allows asymmetric response of the system as contrasted with the symmetrical response required by earlier systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.