TY - JOUR
T1 - A new methodology for identification of critical lines using damping sensitivity analysis
AU - Cho, Yoon Sung
AU - Song, Hwachang
AU - Jang, Gilsoo
N1 - Funding Information:
This work is an outcome of the KETEP fostering program and supported by the Korea Science & Engineering Foundation NRL Program grant (No. R0A-2008-000-20107-0) funded by the Korea government.
PY - 2009/4
Y1 - 2009/4
N2 - When an inter-area mode dominates a low-frequency oscillation in a stressed condition, control of the active power flow of interface lines, with compensating devices, can effectively reduce the electromechanical power oscillations. In general, interface lines in which inter-area oscillations are large are considered to be good locations for installation of compensating devices. A sensitivity analysis with respect to change in active power flow can provide an important factor in electric power system operation. This paper proposes a new methodology to calculate the damping sensitivity with respect to change in active power flow, which can be useful for accurate selection of critical lines from the viewpoint of small-signal stability. In the proposed methodology, a damping sensitivity index is used to select the critical lines to damp power system oscillations. This paper describes how to derive the damping sensitivity for the selected mode and illustrates an example applying the proposed algorithm to a simple two-area system and the New England 39-bus test system.
AB - When an inter-area mode dominates a low-frequency oscillation in a stressed condition, control of the active power flow of interface lines, with compensating devices, can effectively reduce the electromechanical power oscillations. In general, interface lines in which inter-area oscillations are large are considered to be good locations for installation of compensating devices. A sensitivity analysis with respect to change in active power flow can provide an important factor in electric power system operation. This paper proposes a new methodology to calculate the damping sensitivity with respect to change in active power flow, which can be useful for accurate selection of critical lines from the viewpoint of small-signal stability. In the proposed methodology, a damping sensitivity index is used to select the critical lines to damp power system oscillations. This paper describes how to derive the damping sensitivity for the selected mode and illustrates an example applying the proposed algorithm to a simple two-area system and the New England 39-bus test system.
KW - Damping sensitivity
KW - Eigenvalue analysis
KW - Identification of critical lines
KW - Inter-area oscillation
KW - Small-signal stability
UR - http://www.scopus.com/inward/record.url?scp=59349115559&partnerID=8YFLogxK
U2 - 10.1016/j.epsr.2008.08.006
DO - 10.1016/j.epsr.2008.08.006
M3 - Article
AN - SCOPUS:59349115559
SN - 0378-7796
VL - 79
SP - 562
EP - 568
JO - Electric Power Systems Research
JF - Electric Power Systems Research
IS - 4
ER -