Home Tie Line Posted June 24, 2007 Tie Line Share URL Copied to Clipboard https://ingaa.org/glossary/tie-line/ « Back to Glossary Index Circuit which connects two or more control areas or systems of a power system. Related Articles: Glossary: Pseudo-Tie« Back to Glossary Index Related Fact Sheets Safety Pivoting to Support a Net-Zero Future – IMCI Program February 21, 2023