Modelling of current control system to DC transmission links into Microtran program

Author

De Oliveira, H. R P M ; Papaleo, G.K. ; Figueiredo, C.E.C. ; de Jesus, N.C. ; Líbano, F.B.

Author_Institution

AES SUL, Seo Leopoldo, Brazil

Volume

2

fYear

2001

fDate

2001

Abstract

This work presents the structural design of a power circuit and current control system for high-voltage direct-current transmission links in the electromagnetic transients program Microtran. This simulator is a version of EMTP in which additional resources were included for the simulation of systems containing power semiconductors. To represent the power system, it was used 6-pulses bridges (rectifier/inverter), shocking reactors, line DC and, naturally, AC systems. The control system, elaborated in FORTRAN77 language, endowed the rectifier station of the "constant current control" (CCC), and simulated three feedback control types: proportional, integral, and proportional-integral. The control still foresees an extinction angle supervision of the station inverter, seeking to maintain a high power factor in this converter. Among other real characteristics of HVDC system control, the routine contemplates blockade of the station for minimum and maximum fire angles, besides system of shot of the thyristor type "PIE" (pulse ignition equidistant) which is a modern technique of fire valves for links DC and static VAr systems

Keywords

AC-DC power convertors; DC-AC power convertors; EMTP; HVDC power convertors; HVDC power transmission; control system analysis computing; invertors; power system analysis computing; power transmission control; rectifying circuits; software packages; 6-pulses bridges; EMTP; FORTRAN77 language; HVDC transmission links; Microtran program; computer simulation; control simulation; current control system modelling; extinction angle supervision; feedback control; high power factor; integral control; inverter; power semiconductors; proportional control; proportional-integral control; pulse ignition equidistant system; rectifier; structural design; Circuit simulation; Current control; EMTP; Fires; Inverters; Power system modeling; Power system simulation; Power system transients; Reactive power; Thyristors;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Tech Proceedings, 2001 IEEE Porto

Conference_Location

Porto

Print_ISBN

0-7803-7139-9

Type

conf

DOI

10.1109/PTC.2001.964798

Filename

964798