| 1. |
- Chow, Joe. H., et al.
(författare)
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Preliminary synchronized phasor data analysis of disturbance events in the US Eastern Interconnection
- 2009
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Ingår i: Power Systems Conference and Exposition, 2009. PSCE ’09. IEEE/PES. - : IEEE. - 9781424438105 ; , s. 136-143
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Konferensbidrag (refereegranskat)abstract
- This paper presents analysis results of synchronized phasor data from 10 disturbance events recorded in the US Eastern Interconnection (EI). The phasor data covers a wide region in the EI, allowing for the study of disturbance propagation, interarea modes, and oscillations in voltages and currents. The analysis is not straightforward because the EI is a meshed system with adequate interarea mode damping. Disturbances involving tripping a single large generator unit produce very short interarea swing responses. Islanding events involving regions at the perimeter, however, provide more prominent responses for analysis.
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| 2. |
- Ekstedt, Mathias, et al.
(författare)
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Enterprise Architecture Models for Cyber Security Analysis
- 2009
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Ingår i: 2009 IEEE/PES POWER SYSTEMS CONFERENCE AND EXPOSITION. - NEW YORK : IEEE. - 9781424438105 ; , s. 832-837
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Konferensbidrag (refereegranskat)abstract
- Enterprise architecture is a rising discipline that is gaining increasing interest in both industry and academia. It pays attention to the fact that effective management of business and IT needs take a holistic view of the enterprise. Enterprise architecture is based on graphical models as a vehicle for system analysis, design, and communication. Enterprise architecture is also a potential support for control systems management. Unfortunately, when it comes to security analyses, the architectural languages available are not adapted to provide support for this. This presentation focus on research performed as part of the EU seventh framework program VIKING (Vital Infrastructure, Networks, Information and Control Systems Management) and the Swedish Centre of Excellence in Electric Power Engineering, EKC2. The research is focusing on developing and adapting security analyses frameworks to architectural languages on a level where information about control systems' configuration is scarce and thus incomplete and partly unreliable.
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| 3. |
- Elfstadius, Martin, et al.
(författare)
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Method to detect and measure potential market power on electricity markets using the concept of monopolistic energy
- 2009
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Ingår i: 2009 IEEE/PES Power Systems Conference and Exposition, PSCE 2009. - Seattle, WA : IEEE. - 9781424438112 - 9781424438105
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- The existence of market power is a serious concern in modern electric energy markets. Systems and processes that monitor the trading is needed and much research and many proposals on how to deal with the problem have been introduced over the past couple of years. A challenge to all such methods is execution speed, since the identification of market power needs to be done in real-time as market prices are settled. To overcome this challenge the methods need to be simple, involving limited computational effort. This paper presents a simple method with the potential of overcoming the challenge of execution speed. The method is based on the idea of determining the participants with the ability to make considerable increases in price raises without losing all market shares. Such determination can be made in advance during day ahead trading to identify critical areas. During realtime settlement, the method can then be used in a second iteration to study the identified critical areas. In the paper we propose a way to calculate the remaining market shares after a large price raise and refer to these as Monopolistic Energy Levels. These calculated levels of energy, that are deliverable by a single certain participant or by a certain group of participants, are caused by the active congestions in the network. The method detects the quantity of these energy levels and their respective locations in the network. This is a prospective method when used with a prediction of the following days demand. The paper presents the background and development of the proposed method. The use of AC and DC power flow as means to determine the monopolistic energy levels are analyzed and discussed. The paper is concluded with examples of application of the method to a simple multi area power system.
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