Method and control apparatus for static VAR generator and compensator
US3999117A · kind A · utility
39Cited by
4References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1974 |
| Grant date | Dec 21, 1976 |
| Priority date | — |
| Expiry date | Dec 23, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E40/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A static VAR generator circuit having a control system adapted to utilize the values of three phase load currents to generate time delayed firing angles for thyristor controlled inductors which are utilized with parallel capacitors to provide unity power factor and balanced electrical currents to the AC source. The time delayed firing angles are calculated from integrating furnace load currents over prescribed intervals during real time to thus maintain balanced load current at specified phase angles, usually zero, in the three phase system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.