Evaluating the unbalances in sarawak transmission lines using PSCAD/EMTDC

Author

Liu Sai Kwong

Author_Institution

Grid Syst. Oper., Sarawak Energy Berhad (SEB), Kuching, Malaysia

fYear

2014

Firstpage

217

Lastpage

221

Abstract

This paper describes the electromagnetic transient study carried out to calculate the degree of unbalance in existing transmission network in Sarawak. It first discusses the modelling of the transmission grid in PSCAD/EMTDC and the verification of the simulation model against real-time recordings. The paper then provides estimation on the current unbalances in individual circuit and paralleled circuits due to the net through system unbalance and circulating currents based on the positive, negative and zero sequence currents obtained in the simulation. Based on simulation, different phasing arrangements are also assessed to reduce the amount of line unbalance.

Keywords

power grids; power system CAD; power transmission lines; PSCAD-EMTDC; Sarawak transmission lines; circulating currents; electromagnetic transient study; line unbalance reduction; negative sequence current; paralleled circuits; phasing arrangement; positive sequence current; real-time recordings; simulation model verification; system unbalance; transmission grid modelling; unbalance degree; zero sequence current; Conferences; Impedance; Integrated circuit modeling; Load modeling; Poles and towers; Power transmission lines; Substations; circulating current; current unbalance; line transposition; net through; phasing arrangement;

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Energy (PECon), 2014 IEEE International Conference on

Print_ISBN

978-1-4799-7296-8

Type

conf

DOI

10.1109/PECON.2014.7062444

Filename

7062444