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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Zusammenfassung: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.
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ISSN:0885-8950
1558-0679
DOI:10.1109/TPWRS.2018.2808456