| 1. |
- Baudette, Maxime, 1989-, et al.
(författare)
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Validating a real-time PMU-based application for monitoring of sub-synchronous wind farm oscillations
- 2014
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Ingår i: 2014 IEEE PES Innovative Smart Grid Technologies Conference. - 9781479936526 ; , s. 1-5
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Konferensbidrag (refereegranskat)abstract
- This paper presents validation experiments performed on a Phasor Measurement Unit (PMU) based fast oscillation detection application. The monitoring application focuses on the detection of sub-synchronous oscillations, utilizing real-time measurements from PMUs. The application was first tested through Hardware-In-the-Loop (HIL) simulation. Validation experiments were carried out with a different set-up by utilizing a micro grid laboratory. This second experimental set-up as well as the results of the validation experiments are presented in this paper.
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| 2. |
- Leelaruji, Rujiroj, et al.
(författare)
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Computing Sensitivities from Synchrophasor Data for Voltage Stability Monitoring and Visualization
- 2015
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Ingår i: International Transactions on Electrical Energy Systems. - : Hindawi Limited. - 2050-7038. ; 6, s. 933-947
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Tidskriftsartikel (refereegranskat)abstract
- Wide-area early warning systems are dependent on synchrophasor data-based applications for providing timely information to operators so that preventive actions can be taken. This article proposes the use of voltage sensitivities computed from synchrophasor data for voltage stability monitoring, and a visualization approach that can be implemented in widearea early warning systems. In order to provide reliable information, this article addresses the issue of data filtering and correction, and proposes a filtering methodology for robust voltage sensitivity computation. The methodology is developed considering both positive-sequence simulations for methodology development purposes, and real phasor measurement data from a real-time (RT) hardware-in-the-loop (HIL) laboratory for testing the robustness of the developed approach under more realistic conditions. The limitations of the positive-sequence simulation approach for developing PMU-data applications are highlighted, and the challenges of working with the RT HIL lab are recognized. The proposed sensitivity computation approach have also been applied to a real PMU-data obtained from the Nordic transmission system where results are sustained.
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| 3. |
- Vanfretti, Luigi, et al.
(författare)
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A Phase Measurement Unit Based Fast Real-Time Oscillation Detection Application for Monitoring Wind Farm-to-Grid sub-synchronous Dynamics
- 2016
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Ingår i: Electric power components and systems. - : Taylor & Francis Group. - 1532-5008 .- 1532-5016. ; 44:2, s. 123-134
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Tidskriftsartikel (refereegranskat)abstract
- The increase of wind power share increasing has lead to operational challenges for its integration and impact on power grids. Regarding this, unexpected dynamic phenomena, such as oscillatory events around 13 Hz among different wind farms were recorded in the United States of America (USA) by Oklahoma Gas & Electric (OG&E). Such interactions differ from traditional inter-areaoscillations, and the ability to detect them is beyond measurement capabilities of most of existing measurement equipment and monitoring tools in energy management systems. This paper presents the development and implementation of algorithms for fast sub–synchronous oscillation detection, focusing on the aforementioned case. It proposes a real-time monitoring application that exploits synchronized phasormeasurements allowing real-time detection of sub–synchronous wind farm dynamics. This tool was built as a prototype for real-time application and utilizes Phasor Measurement Unit (PMU) data for enhanced monitoring and control. The paper focuses on the tool’s design and its algorithms. Also, it will briefly present three approaches carried out for testing and validating the PMU–based application, one of them compares the proposed tool with an existing tool at OG&E. Through such experiments the tool presented in the paper has been positively validated for real time applications
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| 4. |
- Vanfretti, Luigi, et al.
(författare)
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A PMU-Based Fast Real-Time Sub-synchronous Oscillation Detection Application
- 2015
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Ingår i: 15th IEEE International Conference on Environment and Electrical Engineering. - : IEEE. - 9781479979936
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Konferensbidrag (refereegranskat)abstract
- The share of wind power has strongly increased in electricity production, raising several issues concerning its integration to power grids. Unexpected dynamic phenomena, such as oscillatory events around 13 Hz have been recorded in the US by Oklahoma Gas & Electric (OG&E). Such interactions differ from traditional and well studied inter-area oscillations, and the ability to detect them is beyond the measurement capabilities of most of the existing measurement equipment and monitoring tools in Energy Management Systems (EMS) systems. This paper presents the development and implementation of algorithms for PMU-based real-time fast sub-synchronous oscillation detection, focusing on the aforementioned case. The paper focuses on the tool itself and its algorithms, briefly presents an approach carried out for testing and validating it. Experience from the use of the tool at OG&E is also described.
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| 5. |
- Vanfretti, Luigi, et al.
(författare)
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A Smart Transmission Grid for Europe : Challenges for Developing Grid Enabling Technologies
- 2011
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Ingår i: Elsevier IFAC Publications / IFAC Proceedings series. - 1474-6670.
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Tidskriftsartikel (populärvet., debatt m.m.)abstract
- Smart grids have attracted significant attention lately, and one can even speak of a hype. However, much of the attention is paid to the distribution side and consumer interaction. Nevertheless, also at the transmission level important improvements can be achieved through farsighted and careful intelligent grid design and implementation. This paper identifies different research areas and their respective boundary interactions in order to enable a practical “Smart Grid” implementation in the European power system. Emphasis is placed on three essential aspects of the Smart Transmission Grid. First, the necessary evolution of synchrophasor measurement technology is discussed, as well as the limitations towards and its full integration into power system operation and control. An important aspect to achieve this full integration is the necessity to test and integrate any proposed solution in an open and transparent environment. Secondly, the IT, data and communications paradigm is critically discussed. And lastly, the key questions that are open to the transmission system operators are discussed, specifically regarding the coordination within the pan-European power system and its security. Going beyond the purely academic point-of-view, this paper specifically aims to bring a realistic approach towards research for the transmission network.
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| 6. |
- Vanfretti, Luigi, et al.
(författare)
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A Software Development Toolkit for Real-Time Synchrophasor Applications
- 2013
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Ingår i: 2013 IEEE Grenoble Conference PowerTech, POWERTECH 2013. - 9781467356695
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Konferensbidrag (refereegranskat)abstract
- This article presents a software development toolkit for Wide Area Monitoring Systems. By using this development toolkit, a researcher is able to manipulate synchrophasor data in the LabView environment, which enables fast software prototyping and testing. This toolkit makes full scale testing in real-time easier for researchers, liberating them of complex and time consuming synchrophasor data handling. The toolkit exploits the IEEE C37.118.2 – 2011 protocol making it independent of any specific equipment and their manufacturers. An application of the development kit is demonstrated in a laboratory environment with a specially designed experimental setup composed of a real-time digital simulator and four phasor measurement units (PMUs).
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| 7. |
- Vanfretti, Luigi, 1981-, et al.
(författare)
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Applications of spectral analysis techniques for estimating the nordic grid's low frequency electromechanical oscillations
- 2012
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Ingår i: 16th IFAC Symposium on System Identification. - : IFAC. - 9783902823069 ; , s. 1001-1006
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Konferensbidrag (refereegranskat)abstract
- For power networks such as the Nordic Grid, that have operation constraints limits imposed by the existence of low-damped electromechanical oscillations, the estimation of electromechanical mode properties is of crucial importance for providing power system control room operators with adequate indicators of the stress of their network. This article addresses the practical application of different spectral analysis techniques that can be used for the estimation of electromechanical mode properties using data emerging from real synchronized phasor measurement units (PMUs) located at both the low-voltage distribution and high-voltage transmission networks of the Nordic grid. Emphasis is made on providing systematic approaches to deal with imperfect data found in practice so that accurate estimates can be computed.
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| 8. |
- Vanfretti, Luigi, et al.
(författare)
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Testing and Validation of a Fast Real-Time Oscillation Detection PMU-Based Application for Wind-Farm Monitoring
- 2013
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Ingår i: 2013 First International Black Sea Conference on Communications and Networking (BlackSeaCom). - : IEEE conference proceedings. - 9781479908578 ; , s. 216-221
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Konferensbidrag (refereegranskat)abstract
- This article provides an overview of a monitoring application, its testing and validation process. The application was developed for the detection of sub-synchronous oscillations in power systems, utilizing real-time measurements from phasor measurement units (PMUs). It uses two algorithms simultaneously to both detect the frequency at which the oscillatory event occurs and the level of energy in the oscillations. The application has been developed and tested in the framework of SmarTS Lab, an environment capable of hardware-in-the-loop (HIL) simulation. The necessary components of the real-time chain of data acquisition are presented in this paper, as well as testing and validation results, to demonstrate the accuracy of the monitoring tool and the feasibility of fast prototyping for real-time PMU measurements based applications using the SmarTS Lab environment.
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