TY - JOUR
T1 - A criterion for reverse control action of TCUL controls and their deactivation timings
AU - Yorino, Naoto
AU - Fujimura, Tsutomu
AU - Sasaki, Hiroshi
AU - Sugihara, Hiroaki
AU - Nakanishi, Yosuke
PY - 1998
Y1 - 1998
N2 - The dynamic behaviors of the TCUL controls are investigated from the viewpoint of the effect of control actions on voltage stability as well as on voltage regulations, taking into account the interference among the multiple control actions of TCULS. The Liapunov stability theorem is applied to a system having nonlinear voltagedependent loads to derive conditions for stability. We define the term "reverse control action for multiple TCULS" to indicate undesirable tap operations, where multiple controls as a whole cause the decrease in voltages of specific nodes, leading to voltage collapse, in spite of normal individual operations. A criterion to detect the phenomena is derived and then a new control strategy based on this criterion is demonstrated. In this demonstration, unsuitably acting TCULs are individually deactivated at their most effective timings to improve voltage stability. The effectiveness of the proposed criterion and its application to the deactivation control have successfully been confirmed through numerical simulations in a radial network with three cascaded TCUL transformers, where a specific area of a real system is reduced to form the example system.
AB - The dynamic behaviors of the TCUL controls are investigated from the viewpoint of the effect of control actions on voltage stability as well as on voltage regulations, taking into account the interference among the multiple control actions of TCULS. The Liapunov stability theorem is applied to a system having nonlinear voltagedependent loads to derive conditions for stability. We define the term "reverse control action for multiple TCULS" to indicate undesirable tap operations, where multiple controls as a whole cause the decrease in voltages of specific nodes, leading to voltage collapse, in spite of normal individual operations. A criterion to detect the phenomena is derived and then a new control strategy based on this criterion is demonstrated. In this demonstration, unsuitably acting TCULs are individually deactivated at their most effective timings to improve voltage stability. The effectiveness of the proposed criterion and its application to the deactivation control have successfully been confirmed through numerical simulations in a radial network with three cascaded TCUL transformers, where a specific area of a real system is reduced to form the example system.
KW - Reverse control action of tap changers
KW - Tap-change-under- Load (TCUL) transformer
KW - Voltage collapse
KW - Voltage control
KW - Voltage stability
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U2 - 10.1002/eej.4391240401
DO - 10.1002/eej.4391240401
M3 - Article
AN - SCOPUS:85085632114
VL - 124
SP - 1
EP - 9
JO - Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)
JF - Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)
SN - 0424-7760
IS - 4
ER -