Side-by-side reference

Understand the difference.

Compare the meaning, drawing context and source references of two entries. A similar graphic or shared abbreviation does not establish equivalence.

First referenceCompare with

DVR

Symbols

Dynamic voltage restorer

A dynamic voltage restorer is connected in series between the supply and a sensitive load through an injection transformer. When the supply voltage sags, a converter fed from a DC store or from the supply itself injects the missing voltage so the load sees an almost constant voltage, typically for sags lasting up to a few seconds.

Drawing use: SLD
Application: Microgrid systems
Reference family: IEC / IEEE / ANSI

A distinction that matters

A DVR injects series voltage for sags; a STATCOM injects shunt current to support bus voltage.

Full reference

STATCOM

Symbols

Static synchronous compensator

A static synchronous compensator is a voltage-source converter connected in shunt through a reactor or transformer. By controlling the magnitude of its AC output voltage relative to the network, it supplies or absorbs reactive current. It responds within milliseconds and can maintain close to rated current even when network voltage is low.

Drawing use: SLD
Application: Microgrid systems
Reference family: IEC / IEEE / ANSI

A distinction that matters

A STATCOM uses a converter and keeps reactive current at low voltage; an SVC uses switched reactances whose output falls with voltage.

Full reference

Original educational previews. Follow the source references on each full entry for the appropriate standard or selected product.