Loading [a11y]/accessibility-menu.js
A STATCOM compensation scheme for suppressing commutation failure in HVDC | IEEE Conference Publication | IEEE Xplore

A STATCOM compensation scheme for suppressing commutation failure in HVDC


Abstract:

This paper proposes a STATCOM compensation scheme for suppressing commutation failure (CF) in HVDC. In this scheme, the neutral-point of CHB-STATCOM with star configurati...Show More

Abstract:

This paper proposes a STATCOM compensation scheme for suppressing commutation failure (CF) in HVDC. In this scheme, the neutral-point of CHB-STATCOM with star configuration is grounded and thus possesses three advantages. Firstly, it keeps the high economy of CHB-STATCOM with star configuration. Secondly, three phases are independent of each other, which can be considered as three single-phase STATCOMs, leading to a simple and flexible control strategy and overcoming the control problem when CHB-STATCOM with star configuration operations under unbalance grid. Thirdly, it forms zero-sequence current channel by taking the characteristic of HVDC, which is the neutral-point of the AC grid connected by HVDC is directly grounded, thus it can compensate not only harmonics, positive and negative-sequence reactive power, but also zero-sequence reactive power, resulting in excellent compensatory capacity. In this paper, first of all, feasibility of the proposed scheme in HVDC is analyzed in detail. Then, zero-sequence current is calculated in detail under unbalance power grid condition. Finally, simulations based on PSCAD/EMTDC are carried out to illustrate the effectiveness to suppress CF in HVDC.
Date of Conference: 23-26 October 2016
Date Added to IEEE Xplore: 22 December 2016
ISBN Information:
Conference Location: Florence, Italy

Contact IEEE to Subscribe

References

References is not available for this document.