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EL-4650, EMTP APLICATION GUIDE

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An advanced training material based on EPRI seminars for the EMTP program.
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  I EL-4650 ~~ ~ ~~ ~ lectromagnetic Transients Program EMTP) EMTP DEVELOPMENT COORDIN TION GROUP ELECTRIC POWER RESE RCH INSTITUTE  EPRI EL-4650s R E P 0 R T SUMM RY SUBJECTS Power system planning Transmission: Protection and control TOPICS Electric transients Electromagnetic transients Power systems Substations Transmission EMTP code AUDIENCE Transmission and distribution planners and designers Electrical engineers Electromagnetic li ansients Program (EMTP) Application Guide The electromagnetic transients program is a versatile computer program that utilities worldwide use to analyze high-speed power system transients. This application guide provides procedures and data to assist engineers experienced in electromagnetic transient analysis based on EMTP. BACKGROUND The electromagnetic transients program (EMTP), developed in the early 1970s by the Bonneville Power Administration BPA), has been widely used for transient analysis. To respond to user needs for program documentation, EPRI and the EMTP Development Coordination Group composed of BPA, the Canadian Electrical Association, Hydro Quebec, Ontario Hydro, the U. S. Bureau of Reclamation, and the Western Area Power Administration-have developed several EMTP manuals. These include a primer (EL-4202) to introduce the program s input/output format to new users, a workbook EL-4651) to explain electromagnetic transient principles to engineers with no prior experience in analyzing power system transients, and a rule book EL-4541) to describe program syntax and conventions. OBJECTIVE To develop an EMTP application guide for engineers with experience in electromagnetic transient analysis. APPROACH The project team first briefly described problems encountered in preparing EMTP studies and applying the results. They then developed a components guide that describes the structure and limitations of mathematical models available in EMTP; provides guides to data preparation, including typical parameters for a wide range of equipment; and contains suggestions about which model to use in various circumstances. As a first step in developing a study guide, they showed how EMTP can be used to explain the situations under which surges can occur, describing appropriate analysis techniques and developing sample input files. RESULTS At present, the applications guide provides documentation for modeling transients related to overhead lines, transformers, circuit breakers, initial conditions in a given scenario, current and voltage sources, and lightning arresters. The study on surges focuses on those generated by the closing  or opening of circuit breakers but includes information on temporary overvoltages and lightning surges. EPRI PERSPECTIVE The EMTP application guide provides an important bridge between the introductory EMTP documentation in EPRI reports EL-4202 and EL-4651 and the EMTP operation instructions in EPRI report EL-4541 . The guide contains equipment data never before available. But because it describes the application of EMTP in areas where unanimity among experts is seldom achievable these data should be carefully evaluated before they are used in utility EMTP studies. Moreover the guide addresses only one of many EMTP applications and because the art of applying EMTP is constantly developing its study and component sections will need periodic revision. PROJECT RP2149-1 EPRI Project Manager: J. V. Mitsche Electrical Systems Division Contractor: Westinghouse Electric Corporation For further information on EPRI research programs call EPRI Technical Information Specialists 415) 855-2411.

Gambit Notes 2230

Jul 23, 2017

P-Eye USA

Jul 23, 2017
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