Distribution STATCOM (DSTATCOM) - Symbol, Working and Application
Distribution STATCOM (DSTATCOM)
A DSTATCOM is a voltage source converter based compensating device which is
connected in parallel with the distribution system to control the flow of
reactive power.
In its most basic form, the DSTATCOM configuration consists of
a dc capacitor, one or more inverter modules and a transformer to match the
inverter output to the line voltage. Figure shows the schematic representation
of DSTATCOM. In this arrangement, the steady state power exchange between the
device and the AC system is mainly reactive. The VSC converts the DC voltage
across the storage device into a set of three-phase ac output voltages. These
voltages are in phase and coupled with the AC system through the reactance of
the coupling transformer. Suitable adjustment of the phase and magnitude of the
DSTATCOM output voltages allows effective control of active and reactive power
exchanges between the DSTATCOM and the AC system
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| Figure-1: Distribution Statcom (DSTATCOM) |
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