NDLI: Modified tangent vector-based voltage stability constrained optimal power flow considering limit-induced bifurcation

Content Provider	IET Digital Library
Author	Omi, Shota Shirai, Yasuyuki
Abstract	A modified tangent vector (TV)-based voltage stability constrained optimal power flow method is proposed. The proposed method determines an optimal stable equilibrium point (SEP) satisfying the required voltage stability margin (VSM) considering limit-induced bifurcation (LIB). LIB, which occurs when a generator reaches a reactive power limit during load increasing, may cause an optimistic overestimation of voltage stability and inadequate operation. The key of the proposed method is to use approximated TV for considering LIB as a voltage stability constraint to ensure that the solution becomes an SEP and to avoid inappropriate operation caused by LIB. The validity of the approximation is evaluated analytically and numerically in this study. The threshold for the approximated TV is updated based on the continuation power flow calculation result to satisfy the required VSM. The proposed method was implemented on MATPOWER, and evaluated with a 2-machine 4-bus system and an IEEJ standard WEST10-O/V system. The results show that the proposed method can determine the optimal SEP satisfying the required VSM even if LIB occurs.
Starting Page	4918
Ending Page	4926
Page Count	9
ISSN	17518687
Volume Number	14
e-ISSN	17518695
Issue Number	Issue 21, Nov (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/14/21
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2020.0784
Journal	IET Generation, Transmission & Distribution
Publisher Date	2020-08-28
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Bifurcation Continuation Power Flow Calculation Control of Electric Power System Generator LIB Limit-induced Bifurcation Load Flow Control MATPOWER Optimal Control Optimal Power Flow Optimal SEP Optimal Stable Equilibrium Point Power Generation Control Power System Control Power System Stability Reactive Power Control Reactive Power Limit Stability in Control Theory Tangent Vector-based Voltage Stability Voltage Control Voltage Stability Constraint Voltage Stability Margin VSM
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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