Circuit and method for synchronizing power sources in a parallel AC electrical power system
US4766327A · kind A · utility
17Cited by
17References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1987 |
| Grant date | Aug 23, 1988 |
| Priority date | — |
| Expiry date | Jul 31, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J3/42
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Power sources of a parallel AC electrical power system are synchronized by producing a voltage difference signal representative of the difference in output voltages of the power sources and demodulating that signal to produce a frequency control signal and a voltage magnitude control signal. The output frequency and voltage magnitude of at least one of the power sources is varied in response to the frequency control signal and voltage magnitude control signals, respectively, to minimize the difference in output voltages between the power sources.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.