Abstract: An approach to preparing a specification for a transmission static var compensator is documented by this guide. The intention of this document is to serve as a base specification with an informative annex provided to allow users to modify or develop specific clauses to meet a particular application. Keywords: filters, harmonics, IEEE 1031, static var compensators, static var system, thyristor-controlled reactor (TCR), thyristor valves, thyristor-switched capacitor (TSC), thyristor-switched reactor (TSR).

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