Friday, December 10, 2004

Ferroresonance: Just in Case an Interestying List of Links

Updated on April 25, 2006
Just in case, an interesting list of links on ferroresonance

La ferrorésonance
La ferrorésonance est un phénomène de résonance non linéaire qui peut affecter les réseaux électriques. Les taux d’harmoniques anormaux, les surtensions ou les surintensités transitoires ou permanentes qu’elle provoque sont souvent dangereux pour le matériel électrique. Parmi les avaries mal élucidées, certaines sont dues à ce phénomène rare et non-linéaire.
Cahier Technique Schneider n° 190 édition octobre 1997 -

Practical Aspects of Ferroresonance (An IEEE Working Group under the T&D General Systems Subcommittee)
Ferroresonance is an important issue in transmission and distribution systems. It may result in equipment failure and service interruption that could be very costly and reduce system reliability.

However, very often ferroresonance is incorrectly blamed for failures in the T&D systems, when there is no expert analysis available and/or when there exist little information about the failure.

  • The proposed Working Group will undertake the following endeavors. A comprehensive survey of ferroresonance issues in the literature.
  • Provide an explanation of ferroresonance that is accessible to practicing engineers and researchers alike.
  • Document a comprehensive set of system configurations where ferroresonance is possible. Specifically address the likelihood of ferroresonance in terms of parameters and operating conditions, and address mitigation methods.
  • Document other scenarios involving overvoltages and harmonics that are NOT due to ferroresonance. In terms of operating conditions, circuits, and parameters, differentiate between ferroresonance and these other problems

The Working Group will provide a special publication on the subject, which will be an important contribution to the power engineering community.

Введение Online Russian book on ferrorresonance. ( Online Russian Translator)

This paper describes the phenomenon of ferroresonance, the conditions under which it may appear in electric power systems, and some techniques for avoiding ferroresonance or mitigating its effects. Cadick Corporation Technical Bulletin — 004a Ferroresonance

International Conference on Power Systems Transients (IPST)
The IPST Conference '01 - Rio de Janeiro, Brazil, June 24-28, 2001

  • Ferroresonance Experience in UK: Simulations and Measurements
    Zia Emin BSc MSc PhD AMIEE - Yu Kwong Tong PhD CEng MIEE - National Grid Company Kelvin Avenue, Surrey KT22 7ST UNITED KINGDOM
    Ferroresonance is a complex non-linear electrical phenomenon that can cause dielectric & thermal problems to the transmission plant and switchgear. Electrical systems exhibiting ferroresonant behaviour are nonlinear dynamical systems. The application of conventional linear mathematics is therefore not fully appropriate for the study of ferroresonance. The prediction of ferroresonance is achieved by detailed modelling using a digital computer transient analysis program such as the EMTP/ATP. This paper presents the analyses performed with ATP and compares them with system measurements to identify the crucial factor in ferroresonance.
  • Modeling Ferroresonance Phenomena in an Underground Distribution System
    Surya Santoso, Roger C. Dugan,Thomas E. Grebe Electrotek Concepts, Inc Knoxville, TN 37923, and Peter Nedwick - Distribution Operation Planning - Virginia Power. Richmond, Virginia 23261
    The objective of this paper is to provide an overview of ferroresonance phenomena, its modeling aspects, and practical experience in recognizing, avoiding, and solving the problem. In particular, we will present symptoms of ferroresonance and personal accounts of engineers who witnessed the situations. An actual case involving an underground cable circuit with blown fuses is presented along with solutions to avoid ferroresonance was presented.
  • Investigation of Station Service Transformer Ferroresonance in Manitoba Hydro’s 230-kV Dorsey Converter Station
    Dr. D. A. N. Jacobson. Manitoba Hydro. 820 Taylor Ave. Winnipeg, Manitoba, R3C 2P4, Canada, and Dr. R. W. Menzies. Dept. of Electrical and Comp. Eng. University of Manitoba. Winnipeg, Manitoba, R3T 5V6, Canada
    An investigation of ferroresonance in a 230-kV transformer is undertaken. Correct modelling of the iron-core losses and the direct magnetic coupling between phases are shown to be important in duplicating field observations. A brute-force time-domain method and an analytical method for displaying margins to ferroresonance on a parameter plane are compared. Following proposed bus modifications, it is shown that loading resistors may now be made switchable.

  • It is interesting to browse IPST 2003 Conference Papers as well.
  • Indices For Ferroresonance Performance Assessment in Power Distribution Network
    R.N Mukerjee, Badmanathan Tanggawelu, Aznan Ezraie Ariffin, Malathy Balakrishnan
    International Conference on Power Systems Transients – IPST 2003 in New Orleans, USA
    In a power distribution system having long radial cable fed transformers provided with fuse protection at the tap off point, ferroresonance is a common phenomenon. During expansion and operational planning of a distribution system, to shortlist critical operating conditions exhibiting ferroresonance for detailed temporal simulation, the paper proposes a system parameter based index named characteristic ratio CR and determines its relationship with the geometrical ratio GR, a descriptor of the phase plane trajectory. To identify existence of ferroresonance during actual system operation, a frequency jump index FJI, which can be obtained through real time data analysis, is also proposed and its relationship with GR is determined. A table showing CR and corresponding GR values based on initial detailed studies can be used during subsequent planning process, for identifying only the critical cases for detailed studies and determining the limiting parameters, to avoid ferroresonance. Similarly, the online calculated FJI can be compared to the FJI values in a lookup table based on initial detailed studies and the corresponding GR value can be used to indicate severity of the ferroresonance and prompt the need of initiating corrective action during system operation.
  • Capacitive Voltage Substations Ferroresonance Prevention Using Power Electronic Devices M. Sanaye-Pasand, R. Aghazadeh - International Conference on Power Systems Transients – IPST 2003 in New Orleans, USA
    This paper describes the underlying theory and model of capacitive voltage substations and its assosiated problems. This system is intended to supply electricity to rural communities directly from high voltage transmission lines. This technique leads to important cost reductions when compared with conventional alternatives. However, in several transient cases, some problems such as ferroresonance and overvoltages can occur in these substations. These transient cases are simulated in this paper and a new technique is proposed for damping of dangerous overvoltages due to ferroresonance. In this technique, by using power electronic devices, a damping resistance is switched to secondary side of the system transformer, when necessary. Several computer simulation tests are presented in the paper to highlight the usefulness of this technique. The simulation results present that overvoltages are adequately limited.

Analysis of Ferroresonance in Three-Phase Transformers
B.C. Lesieutre and J.A. Mohamed, MIT; A.M. Stankoviæ, Northeastern University IEEE Powercon 2000
This paper presents a technique for the analysis of ferroresonance in large power system transformers.

Ferroresonant Overvoltage Investigation in Wye-Wye Transformers on Transmission System by Using MATLAB Vahidi, B.; Shariati Nassab, R.; Ghaghaheh Zadeh,. S.; Abedi, E.; (2005). Department of Electrical Engineering Amirkabir University of Technology. Tehran – Iran. Congreso Hispano Luso de Ingeniería Eléctrica. Marbella (Málaga) Spain. Julio 2005.
In this paper for Wye-Wye transformers connections ferroresonance phenomena is investigated and results show effect of different configuration and load.

Ferroresonance in Power Systems: Chaotic Behaviour
Araujo, A.E.A.; Soudack A.C.; Marti J.R.;IEE Proceedings – Pt. C – pp. 237-240, May 1993
The solution of the nonlinear equation for a typical ferroresonant circuit in a power system is shown to exhibit three types of ferroresonant states: periodic, quasiperiodic and chaotic. Simulations of each of these states are presented for different sets of parameters of the system. It is also shown that the transformer losses are an important factor in obtaining the chaotic state.
Remark. It seems the link does not work well, but you can enter the Araujo home page

La Ferrorésonance Université Bordeaux 1. France.
Ce site, consacré à l'étude de la ferrorésonance, est relatif à l'article "La Ferrorésonance: Expérience et Modélisation non Linéaire" réalisé par J.C. Gianduzzo, Stéphane Ygorra et Luc Lasne.

A course and a tool to look a bit more deepper:
Power System Transient and Their Computation Professor M. Kizilcay Course - Universita della Calabria - Sistemi Elettrici per l'Energia

Alternative Transients Program

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