Title :
Modulation controls for the New Zealand DC hybrid project
Author :
Martin, D. ; Wong, W. ; Liss, G. ; Arnlov, B. ; Jonsson, T. ; Gleadow, J. ; de Silva, J.
Author_Institution :
ABB Power Syst. Inc., Pittsburgh, PA, USA
fDate :
10/1/1991 12:00:00 AM
Abstract :
The New Zealand HVDC project is being upgraded from a rated 600 MW to 1240 MW. The result is a hybrid system with the addition of thyristor valves in combination with the original mercury arc valves. The additional DC power required developing modulation and control functions for voltage stabilization at the inverter. Other specified requirements are control functions for spinning reserve sharing, frequency stabilization, and constant frequency control. Constant frequency control was defined for those system conditions where the Haywards power converter may be isolated with the load. The modulation function for frequency stabilization was developed to enhance overall AC system response to disturbances. The various modulation functions implemented for this hybrid HVDC system are described
Keywords :
DC power transmission; frequency control; invertors; mercury arc rectifiers; modulation; power convertors; power system control; project engineering; stability; thyristor applications; transmission networks; voltage control; 1240 MW; 600 MW; HVDC; Haywards power converter; New Zealand; disturbances; frequency; inverter; maintenance; mercury arc valves; modulation; power system control; project; spinning reserve; thyristor valves; voltage stabilization; Control systems; Frequency control; HVDC transmission; Hybrid power systems; Power system stability; Spinning; Thyristors; Underwater cables; Valves; Voltage control;
Journal_Title :
Power Delivery, IEEE Transactions on
