A W-matrix based fast decoupled load flow for contingency studies on vector computers

Journal Article · Sun Aug 01 04:00:00 UTC 1993 · IEEE Transactions on Power Systems (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/59.260907· OSTI ID:5675911

Granelli, G P; Montagna, M; Pasini, G L ^[1]; Marannino, P ^[2]

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1. Univ di Pavia (Italy)
2. Centro Ricerca di Automatica, Monzese (Italy)

This paper deals with an application of the inverse factors method (W-matrix method) to a fast decoupled load flow procedure for steady-state contingency analysis. The W-matrix method, originally developed for the solution of sparse sets of linear equations on MIMD computers, can also be made effective for vector computers. The recurrence problem is overcome by reordering the addition operations required in forward and backward solution. Matrix partitioning is employed to find the best trade-off between the number of fill-ins added to the W matrix and the increased efficiency of vector operations achieved through a reduced number of partitions. The effect of different bus ordering algorithms on the partition number is also considered. Operation reordering is employed to make the bus power computation phase very fast in comparison to traditional bus-wise calculation. Tests are performed on the IEEE 118 bus system, some different configurations of the Italian EHV system and a European equivalent network with up to about 700 buses using a 4-CPU CRAY Y-MP8/432 and a 4-CPU Alliant FX/80 computers.

• OSTI ID: 5675911
• Journal Information: IEEE Transactions on Power Systems (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Transactions on Power Systems (Institute of Electrical and Electronics Engineers); (United States) Vol. 8:3; ISSN 0885-8950; ISSN ITPSEG
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
240201* -- Power System Networks
Transmission & Distribution-- AC Systems-- (1990-)
AC SYSTEMS
COMPUTERIZED SIMULATION
COMPUTERS
CRAY COMPUTERS
DEVELOPED COUNTRIES
DIGITAL COMPUTERS
EHV AC SYSTEMS
ENERGY SYSTEMS
EUROPE
ITALY
POWER SYSTEMS
SIMULATION
STEADY-STATE CONDITIONS
SUPERCOMPUTERS
WESTERN EUROPE