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A new type of STATCOM based on cascading voltage source inverters with phase-shifted unipolar SPWM
Conference proceeding

A new type of STATCOM based on cascading voltage source inverters with phase-shifted unipolar SPWM

Yiqiao Liang, C.O Nwankpa and IEEE
Conference Record of 1998 IEEE Industry Applications Conference. Thirty-Third IAS Annual Meeting (Cat. No.98CH36242), v 2, pp 1447-1453 vol.2
1998

Abstract

Automatic voltage control Bridge circuits Capacitors Diodes Inductors Inverters Reactive power Switches Switching circuits Voltage control
In this paper, a new type of STATCOM is proposed. This new STATCOM is constructed by cascading several identical full bridge (H bridge) voltage source inverters (VSI). A so called phase-shifted SPWM unipolar voltage switching scheme is applied to control the switching devices of each VSI. The harmonics in STATCOM current caused by the DC voltage ripple are rejected by a new method developed in this paper. As a result, the size of inductor and DC capacitors can be further reduced. A very effective startup procedure is proposed to start up the STATCOM. The proposed STATCOM has the advantages of a reduced number of VSIs; the VSIs being identical and extremely fast in response to reactive power change.

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Web of Science research areas
Engineering, Electrical & Electronic
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