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Glossary - V

For your convenience, this page contains an alphabetically organized list of terms, definitions and common acronyms used in the electric utility industry.

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Term/Acronym Definition
VAR Volt-Ampere reactive
VDI Verbal Dispatch Instruction
VEE Validation, Editing and Estimation of meter data
VSS Voltage Support Service
Verbal Dispatch Instruction (VDI) A Dispatch Instruction issued orally.

Voltage Profile

The normally desired predetermined distribution of desired nominal voltage set points across the ERCOT System.

Voltage Support Service (VSS) An Ancillary Service that is required to maintain transmission and distribution voltages on the ERCOT Transmission Grid within acceptable limits.