Methods of enhancing capacity of transformer equipment and of power flow control using phase-shifting transformers and series impedances in parallel arrangements
US5907239A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1997 |
| Grant date | May 25, 1999 |
| Priority date | — |
| Expiry date | Mar 24, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E40/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for enhancing the capacity of a transformer for a polyphase AC network. The method and apparatus having a constant current transformer branch connected in parallel with at least one conventional transformer branches. The constant current transformer branch includes a phase-shifting transformer in series with reactive elements. Further, for power flow control between two synchronous polyphase AC network busses, two parallel branches are used in which one includes a phase-shifting transformer, while the other includes a reactive element. An additional phase-shifting transformer is added in series with the reactive element to enhance the power flow control flexibility.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.