EMTP is an acronym for Electromagnetic

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Program. It is a software tool used by power systems engineers to analyse electromagnetic transients (generically "EMT") and associated insulation issues. It is also a trademark for the commercial version of EMTP. In 1964 in his Ph.D. thesis (

Technical University of Munich The Technical University of Munich (TUM or TU Munich; german: Technische Universität München) is a public research university in Munich, Germany. It specializes in engineering, technology, medicine, and applied and natural sciences. Establis ...

), Dr. Hermann Dommel used

Nodal analysis In electric circuits analysis, nodal analysis, node-voltage analysis, or the branch current method is a method of determining the voltage (potential difference) between "nodes" (points where elements or branches connect) in an electrical circuit in ...

with the companion circuit model and the constant-parameter transmission line model, to simulate electromagnetic transients. The companion circuit model used the trapezoidal integration rule. At that time

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also started to develop a computer software for studying switching overvoltages for insulation coordination. In 1966, Hermann Dommel was invited to

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from Germany to work on the development of a software named Electromagnetic Transients Program (EMTP). The EMTP development was part of a project for the development of load-flow and stability analysis software at

. This project was directed by W. F. Tinney whose fundamental contributions to the solution of

sparse matrices In numerical analysis and scientific computing, a sparse matrix or sparse array is a matrix in which most of the elements are zero. There is no strict definition regarding the proportion of zero-value elements for a matrix to qualify as sparse b ...

enabled EMTP and other packages to simulate large power systems. In 1973 H. Dommel left

to become a professor at

University of British Columbia The University of British Columbia (UBC) is a public university, public research university with campuses near Vancouver and in Kelowna, British Columbia. Established in 1908, it is British Columbia's oldest university. The university ranks a ...

. The development of EMTP was then taken over and significantly accelerated by W. Scott Meyer. W. Scott Meyer collaborated with various researchers & experts including A. Ametani, V. Brandwajn, L. Dubé, J. R. Marti, A. Semlyen. In 1981, the Development Coordination Group (DCG) of EMTP was proposed and formed by

in which Hermann Dommel maintained his participation. Over the following years, several organizations became members of DCG-EMTP to contribute research, development and field tests. The list included:

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, AEP, CEA, CRIEPI,

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Hydro-Québec Hydro-Québec is a public utility that manages the generation, transmission and distribution of electricity in the Canadian province of Quebec, as well as the export of power to portions of the Northeast United States. It was established by the ...

Ontario Hydro Ontario Hydro, established in 1906 as the Hydro-Electric Power Commission of Ontario, was a publicly owned electricity utility in the Province of Ontario. It was formed to build transmission lines to supply municipal utilities with electricity ge ...

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joined the DCG in 1983. In 1984

left the DCG and W. Scott Meyer continued independently and personally developing with the existing EMTP code under the new name EMTP-ATP in his free time. ATP is acronym of Alternative Transients Program being non-commercial and royalty-free version of EMTP. EMTP-ATP was then in 1987 available in Europe distributed by Leuven EMTP Center at the

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(Katholieke Universiteit) as the first EMTP version running under operating system

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on IBM XT/AT and compatible personal computers. The DCG pursued the development of EMTP with its members. Several full versions were released on mainframe computers and later

Unix Unix (; trademarked as UNIX) is a family of multitasking, multiuser computer operating systems that derive from the original AT&T Unix, whose development started in 1969 at the Bell Labs research center by Ken Thompson, Dennis Ritchie, and ot ...

workstations. The development work was continued mainly by V. Brandwajn, J. Mahseredjian and L. Marti. In 1992, J. Mahseredjian, then working at IREQ (

) converted the EMTP code to work on

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and

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. The first

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EMTP PC version was commercialized by

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. In 1996 a major EMTP version was released on

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. At that time it became acknowledged and urgent in the DCG to modernize the EMTP code and improve its numerical methods. In 1996 J. Mahseredjian proposed to the DCG to abandon the old EMTP code and to rewrite it from scratch using modern programming languages, and latest numerical methods. His demonstrations and prototypes triggered the EMTP recoding (restructuring) project. The EMTP recoding project started in 1998 by J. Mahseredjian. J. Mahseredjian worked later with a small team of developers, including mainly S. Dennetière, O. Saad, C. Dewhurst and L. Dubé, to deliver the new commercial version of EMTP, in 2003. It was then released under the version named EMTP-RV, RV meaning restructured version. This new commercial EMTP code introduced several major improvements in graphical user interface, programming practices and numerical methods. In 2004, J. Mahseredjian left IREQ to become a professor at

Polytechnique Montréal Polytechnique Montréal () (previously ''École polytechnique de Montréal''; ) is an engineering school affiliated with the Université de Montréal in Montreal, Quebec, Canada. In English it may occasionally be referred to as "Montreal Polytech ...

. The DCG has been dismantled some time after the release of the new commercial version of EMTP. Currently the commercial version is controlled by

and RTE. It is developed and maintained by the team of J. Mahseredjian inside the EMTP Alliance. Over the years, several researchers worldwide contributed numerical methods and models for EMT-type simulations tools. The fundamental concept of companion circuit model with trapezoidal integration triggered other major software developments. The EMT-type software named EMTDC/PSCAD is currently developed and maintained by Manitoba HVDC Research Center. The real-time simulation tool named RTDS is commercialized by RTDS Technologies Inc.

also developed a real-time EMT solver named Hypersim. Hypersim is currently commercialized by Opal-RT Technologies Inc. PowerFactory – DIgSILENT has a full EMT-type simulation module.

MathWorks MathWorks is an American privately held corporation that specializes in mathematical computing software. Its major products include MATLAB and Simulink, which support data analysis and simulation. History The company's key product, MATLAB, was ...

commercializes a toolbox named Simscape Electrical which is based on the state-space approach for solving electrical circuits and benefits from the powerful control system simulation environment of

Simulink Simulink is a MATLAB-based graphical programming environment for modeling, simulating and analyzing multidomain dynamical systems. Its primary interface is a graphical block diagramming tool and a customizable set of block libraries. It offers t ...

References

*The EMTP Theory Book, Hermann Dommel *Electrical Transients in Power Systems, Allan Greenwood, John Wiley & Sons, 1991.

External links

EMTP

EMTP-ATP

PSCAD-EMTDC

RTDS Technologies

OPAL-RT Technologies

Microtran, UBC
Electromagnetic simulation software Electric power distribution {{simulation-software-stub

See also

References

External links