Improving the dynamic performance of a complex AC/DC system by HVDC control modifications

Author

Hammad, A.E. ; Gagnon, J. ; McCallum, D.

Author_Institution

ABB Power Syst., Baden, Switzerland

Volume

5

Issue

4

fYear

1990

fDate

10/1/1990 12:00:00 AM

Firstpage

1934

Lastpage

1943

Abstract

Enhancement of the overall system dynamic performance of an AC/DC scheme is possible by minor modifications in the HVDC (high-voltage DC) controls. The Chateauguay HVDC scheme comprises two back-to-back converter blocks, each with a rated capacity of 400 MW. It is designed to export power from Quebec to the NYPA (New York Power Authority) system. Some control modifications currently under consideration for the Chateauguay HVDC scheme (which has interconnections to the Beauharnois generators and to the 765 kV intertie to NYPA) are presented. The salient features of such control modifications are discussed using the results of an investigation by digital and analog simulations that demonstrate the achieved improvements. The modifications lead to a remarkable improvement in the damping of AC voltage and tieline power oscillations under heavy loading conditions. Voltage instability following disturbances under very weak AC-system conditions can also be avoided

Keywords

DC power transmission; power system control; power system interconnection; 400 MW; 765 kV; AC/DC system; Beauharnois generators; Chateauguay HVDC; HVDC control modifications; New York Power Authority; Quebec; analog simulations; back-to-back converter; digital simulations; dynamic performance; tieline power oscillations; voltage instability; Control systems; Filters; HVDC transmission; Inverters; Power system dynamics; Power system interconnection; Power system stability; Power transformers; Rectifiers; Voltage control;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.103690

Filename

103690