ABB wins $90 million power order to improve grid stability in Michigan

Zurich, Switzerland, February 23, 2012 — ABB won an order worth around $90 million from American Transmission Co. to supply a power solution that will help control the flow of power and enhance grid stability in Michigan.

ABB's low-loss high-voltage direct current technology will control the power flow between the Upper and Lower Peninsulas of Michigan and provide dynamic voltage support, thereby increasing regional grid reliability and also enabling integration of additional wind generation. The link is scheduled to go into operation in mid-2014.

As part of the project, ABB will design, supply and install a 200 MW back-to-back HVDC Light station in Upper Michigan. During maintenance or other occasions when one of the converters is non-functional, the other converter operates like a STATCOM (static synchronous condenser) regulating device, continuing to provide dynamic voltage support to the network.

An HVDC back-to-back system comprises two converters connected directly to each other, without any DC transmission line, making it possible to fully control the power transfer through the connection.

The voltage and reactive power control features of the system will enable the integration of additional wind energy and stabilization of the network. In the rare case of a power outage, the technology's "black-start" capability allows for fast network restoration using power from the other end of the link.

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