Static VAR generator compensating control circuit and method for using same
US4172234A · kind A · utility
11Cited by
2References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1978 |
| Grant date | Oct 23, 1979 |
| Priority date | — |
| Expiry date | Feb 23, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E40/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control circuit for a static VAR generator measures load power during consecutive half cycles of the source voltage. This information, together with load voltage and load current information is used to determine the firing angles of the VAR generator thyristors for providing compensating current for keeping the source current in phase with the source voltage and for balancing the source currents in a three-phase electrical system. The total computation time for determining the firing angles extends into the half cycle in which correction is to be applied beyond a fixed minimum firing angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.