PERFORMANCE ANALYSIS OF D-STATCOM COMPENSATOR(3)

COMPENSATOR(3)

The performance of the DSTATCOM depends on the control algorithm i.e. the extraction of the current components. For this purpose there are many control schemes which are reported in the literature and some of these are instantaneous compensation, instantaneous symmetrical components, synchronous reference frame (SRF) theory, computation based on per phase basis, and scheme based on neural network. Among these control schemes instantaneous reactive power theory and synchronous rotating reference frame are most widely used.

For reactive power compensation, DSTATCOM provides reactive power as needed by the load and therefore the source current remains at unity power factor (UPF). Since only real power is being supplied by the source, load balancing is achieved by making the source reference current balanced. The reference source current used to decide the switching of the DSTATCOM has real fundamental frequency component of the load current which is being extracted by these techniques.

A. Instantaneous Reactive Power Theory

Instantaneous reactive power theory has been initially proposed by Akagi in 1983 The theory is based on the transformation of three phase quantities to two phase quantities in a -p frame and calculation of instantaneous active and reactive power in this frame.

Representative APR 391%

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