NDLI: Optimal re-dispatch of generating units ensuring small signal stability

Content Provider	IET Digital Library
Author	Adeli, Seyed Hamidreza Rabiee, Abdorreza Boroujeni, Samad Taghipour
Abstract	This study presents a new re-scheduling method for generating units in the form of optimal power flow (OPF) problem, considering small signal stability (SSS) constraint of power system in normal operation and N−1 contingency of transmission lines outage. In base case, total operation cost is minimized, considering voltage stability margin and N−1 line contingency. The SSS of system is studied by using modal analysis. In case of unstable modes in the generator(s) rotor angle, the generators scheduling should be re-dispatched. Using modal analysis and sensitivity matrix, the generators are divided into three groups: increasing power generators, decreasing power generators, and unchanged power generators. In order to increase the accuracy of re-scheduling program, two new technical and economic indexes are introduced. The output power of the candidate generators is increased/decreased based on the indexes to stabilize generator(s) with unstable rotor angle (URA). The salient feature of proposed method is its capability on stabilizing system with one or more URA generators with minimum changes in base case OPF results. The Validity of proposed method is studied on IEEE 39-bus 10-machine, and IEEE 69-bus 16-machine test systems. The obtained results verify effectiveness of proposed re-dispatch algorithm in case of single or multiple URA generator(s).
Starting Page	3692
Ending Page	3701
Page Count	10
ISSN	17518687
Volume Number	14
e-ISSN	17518695
Issue Number	Issue 18, Sep (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/14/18
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2019.1319
Journal	IET Generation, Transmission & Distribution
Publisher Date	2020-04-06
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	A.C. Machine Control of Electric Power System D.C. Machines Generator Scheduling IEEE 69-bus 16-machine Test System Load Flow Modal Analysis Multiple URA Generator Optimal Power Flow Problem Optimal Re-dispatch Power Generation Dispatch Power Generation Scheduling Power Generator Power Grid Power System Power System Control Power System Economics Power System Managemen Power System Operation Power System Stability Re-dispatch Algorithm Re-scheduling Method Rescheduling Program Rotors Signal Stability Constraint Single URA Generator SSS Stability in Control Theory Transmission Line Unstable Rotor Angle Voltage Stability Margin
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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