Voltage sag source location technology based on corresponding sequence components

Ke Zhu; Yixuan Wang; Peng Yin; Jian Ni

Voltage sag source location technology based on corresponding sequence components

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Author(s): Ke Zhu ¹ ; Yixuan Wang ¹ ; Peng Yin ¹ ; Jian Ni ¹
- Affiliations: 1: Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education, Shandong University, Jinan, People's Republic of China
Source: Volume 9, Issue 9, 05 June 2015, p. 820 – 827
DOI: 10.1049/iet-gtd.2014.0772 , Print ISSN 1751-8687, Online ISSN 1751-8695

Received 10/08/2014, Accepted 17/11/2014, Revised 16/10/2014, Published 23/02/2015

Determining the relative region where voltage sags originates is useful to identify the responsible party causing the power quality problem and monitor system or equipment operating condition. As different kinds of voltage sag will cause different sequence components to change according to the neutral point operation mode in the distribution system, a modified incremental impedance-based method for determining voltage sag source (VSS) location is proposed in this study. This study starts with the VSS direction theory based on incremental impedance, and derives location criteria for different types of VSSs according to the neutral point operation mode of the Chinese distribution network. The VSS location strategy is finally accomplished through the analyses of voltage sag's capacity for passing through the service transformer and the impact of system transient on incremental impedance calculation. The method locates various VSSs based on existing PQ measure points and has clear physics concept. Theoretical analysis, simulation and lab experiments have verified its effectiveness.

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Voltage sag source location technology based on corresponding sequence components

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