Accession Number : ADA019813

Title :   A User-Simplified Power Distribution System Analysis Program.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING

Personal Author(s) : Heer,Michael R.

Report Date : DEC 1975

Pagination or Media Count : 284

Abstract : The paper addresses the problem of developing a user-simplified power distribution system analysis program. A computer program was written to perform a load-flow and/or short-circuit analysis of a power distribution system. The program utilizes sparsity programming and large matrix techniques so that a 250 bus, 500 line network may be studied without excessive computer core requirements. Input routines were developed to read in line data either as pre-calculated impedances (ohms or per unit values), or as descriptive information (i.e. wire/transformer type, wire/transformer size, voltage rating, conductor length, etc.) with branch impedances calculated by the program. The latter routine incorporates engineering approximations to derive the necessary branch sequence impedances for various network elements (e.g. aerial conductor, cable, transformers, and series reactive components). The load-flow solution technique utilized is the recently described fast-decoupled Newton-Raphson with dynamic bus ordering. Large matrix techniques are used in the short-circuit study, with large systems studied as 50-bus (maximum) subsystems.

Descriptors :   *Electric power distribution, Load control, Computer programs, Systems analysis, Networks, FORTRAN, Network flows, Theses

Subject Categories : Computer Programming and Software
      Computer Systems

Distribution Statement : APPROVED FOR PUBLIC RELEASE