An Online Optimization Algorithm for Alleviating Contingencies in Transmission Networks

Power systems are increasingly operated in a corrective rather than preventive security mode, which means that appropriate control actions must be taken immediately after a contingency has occurred. This paper proposes an online algorithm for automatically alleviating contingencies such as voltage l...

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Veröffentlicht in:	IEEE transactions on power systems Jg. 33; H. 5; S. 5572 - 5582
Hauptverfasser:	Mazzi, Nicolo, Zhang, Baosen, Kirschen, Daniel S.
Format:	Journal Article
Sprache:	Englisch
Veröffentlicht:	New York IEEE 01.09.2018 The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:	Algorithms Alogorithm design and analysis Automatic control Automatic generation control Contingency Contingency alleviation Contingency management corrective security Data buses Electric potential Flow equations Frequency control Mathematical model meshed networks online optimization Optimization Power flow Power system security Voltage limit violations
ISSN:	0885-8950, 1558-0679
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Abstract	Power systems are increasingly operated in a corrective rather than preventive security mode, which means that appropriate control actions must be taken immediately after a contingency has occurred. This paper proposes an online algorithm for automatically alleviating contingencies such as voltage limit violations and line overloads. Unlike previously proposed approaches, the network itself serves as a natural solver of the power flow equations. This makes it possible to start the implementation immediately and avoids problems caused by modeling errors. Every time the controller receives measurements from the grid, it evaluates the presence of contingencies and computes the optimal corrective actions that can be implemented before the next sampling period, subject to ramping constraints of the generators. These corrective actions are implemented through the standard automatic generation control. Finding the optimal incremental corrective actions is fast because this problem is linearized. The effectiveness of this algorithm at correcting both line overloads and voltage violations is demonstrated using the IEEE-118 Bus test system.
AbstractList	Power systems are increasingly operated in a corrective rather than preventive security mode, which means that appropriate control actions must be taken immediately after a contingency has occurred. This paper proposes an online algorithm for automatically alleviating contingencies such as voltage limit violations and line overloads. Unlike previously proposed approaches, the network itself serves as a natural solver of the power flow equations. This makes it possible to start the implementation immediately and avoids problems caused by modeling errors. Every time the controller receives measurements from the grid, it evaluates the presence of contingencies and computes the optimal corrective actions that can be implemented before the next sampling period, subject to ramping constraints of the generators. These corrective actions are implemented through the standard automatic generation control. Finding the optimal incremental corrective actions is fast because this problem is linearized. The effectiveness of this algorithm at correcting both line overloads and voltage violations is demonstrated using the IEEE-118 Bus test system.
Author	Zhang, Baosen Mazzi, Nicolo Kirschen, Daniel S.
Author_xml	– sequence: 1 givenname: Nicolo surname: Mazzi fullname: Mazzi, Nicolo email: nicolo.mazzi@ed.ac.uk organization: School of Mathematics, University of Edinburgh, Edinburgh, U.K – sequence: 2 givenname: Baosen orcidid: 0000-0003-4065-7341 surname: Zhang fullname: Zhang, Baosen email: zhangbao@uw.edu organization: Department of Electrical Engineering, University of Washington, Seattle, WA, USA – sequence: 3 givenname: Daniel S. orcidid: 0000-0002-6471-0285 surname: Kirschen fullname: Kirschen, Daniel S. email: kirschen@uw.edu organization: Department of Electrical Engineering, University of Washington, Seattle, WA, USA
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SubjectTerms	Algorithms Alogorithm design and analysis Automatic control Automatic generation control Contingency Contingency alleviation Contingency management corrective security Data buses Electric potential Flow equations Frequency control Mathematical model meshed networks online optimization Optimization Power flow Power system security Voltage limit violations
Title	An Online Optimization Algorithm for Alleviating Contingencies in Transmission Networks
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