Fast load shedding for angle stability control

• Published in: 2003 IEEE Power Engineering Society General Meeting (IEEE Cat. No.03CH37491) Vol. 4; pp. 2275 - 2279 Vol. 4
• Main Authors: Rovnyak, S.M., Mei, K., Li, G.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 2003
• Subjects: Communication system control; Delay; Discrete event simulation; Electrical resistance measurement; HVDC transmission; Load flow control; Power system economics; Stability; Testing; Voltage control
• ISBN: 0780379896; 9780780379893
• DOI: 10.1109/PES.2003.1270976

This paper explores through simulation the speed of load shedding required for effective one-shot angle stability control. Experience with load shedding in China indicates that present technology is capable of shedding large amounts of load in approximately 0.1 second. An iterative, sensitivity-based procedure is used to find combinations of one-shot controls actuated 0.1 second after an event to stabilize transient events in simulation on a 176-bus model of the western North American interconnection. Some of these events require load shedding in addition to generator tripping and HVDC fast power changes in order to be stabilized. A response-based control scheme that uses apparent resistance R and its rate of change Rdot measured near the center of an intertie to trigger one-shot controls is tested with different actuation delays. The combination of controls ordered by the R-Rdot controller includes HVDC fast power changes and load shedding.