AMSC, a global solutions provider serving wind and grid leaders, recently received an order for a D-VAR reactive compensation solution from Xiamen Red Phase Instruments Inc. This is the third order that AMSC has received from Red Phase. The new D-VAR system, which was shipped in late 2012, is now being used to resolve power-quality issues for China Southern Power Grid.

Red Phase will install the D-VAR STATCOM system in a 110-kV substation in the Yunnan province of China. The D-VAR system is being used to connect a 35-kV bus line to the substation while regulating voltage, mitigating transient voltage deviations, ensuring high power quality and improving grid stability.

D-VAR dynamic reactive compensation systems are classified as static compensators (STATCOMs), a member of the FACTS (flexible alternating-current transmission system) family of power electronic solutions for AC power grids. AMSC's D-VAR solutions are able to detect and instantaneously compensate for voltage disturbances by dynamically injecting leading or lagging reactive power into the power grid.