Châteauguay back-to-back upgrade

The back-to back station is supplied from a 315 kV source on the Hydro-Québec side and from a 120 kV source on the New York Power Authority (NYPA) side. Generation is supplied by the Beauharnois power station. The station was constructed by BBC and Siemens in 1984.

In 2008, ABB received a contract for the upgrading of the station. The control and protection system will be replaced by the fully digital MACH 2^TM system. The new system will be commissioned during April and May in 2009, with an outage time of only seven weeks.

Since the station comprises two blocks and each block will be renovated separately, the station will maintain at least half of its capacity during the installation period.

This is the seventh HVDC upgrade project awarded to ABB since 2002. Read about the others at the bottom of this page.

Main data
Commissioning year:	1984 (Upgrade 2009)
Power rating:	2 x 500 MW
No. of poles:	2 blocks
AC voltage:	Hydro-Québec side: 315 kV NYPA side: 120 kV
DC voltage:	140 kV
Type of link	Back-to-back station
Main reason for choosing HVDC:	Asynchronous networks