Title :
Local voltage instability monitoring and protection in the presence of self-restoring loads and two-level LTCs
Author :
Lambrou, Charalambos ; Mandoulidis, Panagiotis ; Vournas, Costas
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Tech. Univ. of Athens, Athens, Greece
Abstract :
In this paper we give an overview of a local voltage instability monitoring and protection system integrated in the controller of each bulk power delivery LTC transformer. The proposed system identifies imminent voltage instability and subsequently applies corrective measures to restore stable operation by properly adjusting the distribution voltage setpoint of the LTC. The system is extended in this paper to include also the LTCs acting on EHV/HV autotransformers and is checked in the presence of self-restoring loads. Application on a small test system and a 52-bus test system shows the performance of the proposed system and the associated problems and solutions.
Keywords :
autotransformers; on load tap changers; power system dynamic stability; power system protection; 52-bus test system; EHV-HV autotransformers; bulk power delivery LTC transformer; distribution voltage setpoint; local voltage instability monitoring; protection system; self-restoring loads; small-test system; two-level LTC; Generators; Monitoring; Power system stability; Stability analysis; Threshold voltage; Voltage control; Voltage measurement; Load Tap Changers; Voltage stability; protection against voltage collapse; restorative load; voltage instability monitoring;
Conference_Titel :
Power and Energy Society General Meeting, 2011 IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4577-1000-1
Electronic_ISBN :
1944-9925
DOI :
10.1109/PES.2011.6039524
