Turbo generator plant with a high voltage electric generator

US6936947B1 · kind B1 · utility

Assignee

• ABB AB · SE

Inventors

• Mats Leijon · Västerås, SE
• Peter Templin · Mörbylånga, SE
• Claes Ivarson · Västerås, SE
• Lars Gertmar · Visby, SE
• Peter Carstensen · Adirondack, US
• Bertil Larsson · Hagfors, SE
• Soren Berggren · Hagfors, SE
• Erland Sörensen · Hagfors, SE
• Bertil Berggren · Västerås, SE
• Gunnar Kylander · Västerås, SE
• Mons Hölleland · Västerås, SE

Key dates

• Filing date: May 27, 1997
• Grant date: Aug 30, 2005
• Expiry date: May 27, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S174/29
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

In a plant containing a turbo-generator the magnetic circuit of the turbo-generator is included in an electric generator which directly supplies a high supply voltage of 20-800 kV, preferably higher than 36 kV. The insulation of the generator is built up of a cable (6) comprising one or more current-carrying conductors (31) with a number of strands (36) surrounded by outer and inner semiconducting layers (34, 32) and intermediate insulating layers (33). The outer semiconducting layer (34) is at earth potential. The phases of the winding are Y-connected. The Y-point may be insulated and protected from over-voltage by means of surge arresters, or else the Y-point may be earthed via a suppression filter.