Control system for a current source converter supplying an AC bus
US5041959A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 14, 1990 |
| Grant date | Aug 20, 1991 |
| Priority date | — |
| Expiry date | Aug 14, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J15/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrical power converter including both DC and AC power terminals which are respectively connected to a DC current source and an AC voltage source, the latter comprising the grid of an AC power utility. A capacitor is coupled to the AC terminals along with a load. A control and gating circuit is coupled to the converter for supplying control signals for the thyristors of a converter bridge included in the polyphase converter. When disconnected from the utility grid, a relatively fast acting control loop is coupled to the control and gating circuit and is responsive to the current flowing in the capacitor and an AC reference voltage to accommodate the current source characteristics of the converter for maintaining an output voltage of substantially constant amplitude across the AC terminals. A second and relatively slower acting control loop is also coupled to the control and gating circuit via the fast acting control loop and is responsive to the AC voltage across the capacitor and the load for providing regulation of the voltage across the AC terminals during steady state operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.