![]() ![]() In 2009, Sharyland Utilities began working with the city of Brownsville’s Public Utilities Board (BPUB) to develop a solution that would improve the reliability of the transmission system in the Brownsville area and, more broadly, the Lower Rio Grande Valley of Texas. The Cross Valley Project is a perfect example of Sharyland’s creativity and willingness to work with local partners and neighboring electric providers to meet regional needs. In July 2014, Sharyland expanded the capacity of its DC Tie from its initial 150 MW to 300 MW, adding additional reliability support and allowing for future economic growth in the region. Not only does this strengthen the stability of both grids, but it has also fostered an international wholesale market that brings together power generators and commercial customers on both sides of the border. Its technology allows for a bi-directional flow of electricity between both grids, allowing each grid to rely on the other in times of peak demand. Sharyland’s open-access, cross-border DC Tie was the first of its kind to support commercial business activity and to provide emergency power from either Texas or Mexico. This DC Tie links the ERCOT grid with the Mexican national grid, operated by the Centro Nacional de Control de EnergÍa (CENACE). ![]() Sharyland’s High Voltage Direct Current Tie (DC Tie) was originally commissioned into service in October 2007 as a 150 megawatt (MW) transmission interconnection located along the Rio Grande border near the cities of Mission, Texas, and Reynosa, Tamaulipas, Mexico.
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