Dynamic VAR Support for a More Reliable Power Grid

AMSC’s D-VAR product, which comprises an integrated array of AMSC’s PowerModule power converters, offers a powerful yet cost-effective way of regulating and stabilizing voltage levels by injecting dynamic reactive power (VARs) into the power grid at precise locations where voltage problems can occur. D-VAR systems can be utilized in a wide range of applications including, voltage regulation and instability, var support for wind farm interconnection to the grid, and optimizing power transfer on stability limited transmission networks.

D-VAR (Dynamic VAR) reactive compensation systems provide a powerful and cost-effective source of dynamic VARs for a wide range of operational needs. They can correct voltage instability problems on transmission networks; provide dynamic steady-state voltage and power factor control and regulation on transmission and distribution networks; protect industrial facilities requiring premium power quality; and support a stable point of interconnection for distributed generation facilities and large-scale wind farms. Classified as Flexible AC Transmission System (FACTS) devices, D-VAR systems utilize an American Superconductor proprietary and advanced control and monitoring system that detects and instantaneously compensates for voltage disturbances by injecting leading or lagging reactive power, measured in VARs (volt amperes – reactive), precisely where it is needed on the grid. D-VAR systems are extremely flexible and scalable, ranging from 2 MVAR to hundreds of MVAR.