Title :
Evaluating the unbalances in sarawak transmission lines using PSCAD/EMTDC
Author_Institution :
Grid Syst. Oper., Sarawak Energy Berhad (SEB), Kuching, Malaysia
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;
Conference_Titel :
Power and Energy (PECon), 2014 IEEE International Conference on
Print_ISBN :
978-1-4799-7296-8
DOI :
10.1109/PECON.2014.7062444
