Malfunction detector for static VAR controllers
US4599553A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1985 |
| Grant date | Jul 8, 1986 |
| Priority date | — |
| Expiry date | Feb 28, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E40/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A static VAR generator for providing reactive compensation incorporating a malfunction detector. The static VAR generator comprises a reactance which is linearly responsive to a first linearized control signal and produces an output signal proportional to the reactive compensation which provides a feedback signal. A director control uses the feedback signal and an adjustable reference signal to provide the first linearized control signal based on the difference between the reference and feedback signals. A tracker controller provides a second linearized control signal based on the reference and feedback signals. The second control signal is compensated by an equalizer that determines the difference between the first and second control signals. The compensation counters the difference between the first and second control signals caused by the offset and component tolerances in the two controllers and makes the second control signal substantially equal to and track the first control signal. A first comparator conpares the compensated second control signal with the first control signal. Whenever these two control signals are not substantially equal, a fault has occurred in one of the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.