Title :
Voltage unbalance emission assessment
Author_Institution :
Inst. for Electr. Power Syst., Tech. Univ. Graz, Graz, Austria
Abstract :
Aim of this paper is to draw the attention on the principle origin for unbalance, taking into account the part caused by negative sequence currents as well as the part arising from non ideal grid impedance with non negligible coupling impedance between the positive and negative sequence system. This system inherent part originates from non transposed lines or parallel three phase lines operating over long distances. In 61000-3-13 this is taken into account by a factor kuE, which is explained in this paper.
Keywords :
electric current measurement; transmission networks; voltage measurement; negative sequence current; non ideal grid impedance; non negligible coupling impedance; parallel three phase line; IEC standards; Impedance; Instruments; Phase measurement; Power quality; Power system harmonics; Power systems; Symmetric matrices; Voltage fluctuations; Writing;
Conference_Titel :
Electric Power Quality and Supply Reliability Conference (PQ), 2010
Conference_Location :
Kuressaare
Print_ISBN :
978-1-4244-6978-9
DOI :
10.1109/PQ.2010.5550022
