Protection assessment in electrical distribution grids based on state estimation. Issue 15 (20th August 2018)

• Record Type: Journal Article
• Authors: Offergeld, Thomas; Cramer, Moritz; Glinka, Felix; Schnettler, Armin
• Is Part Of: Journal of engineering. Volume 2018:Issue 15(2018)
• Page Start: 982
• Page End: 986
• Publication Date: 2018-08-20
• Subjects: power grids -- distributed power generation -- regression analysis -- invertors -- power distribution protection -- power system state estimation; electrical distribution grids -- protective devices -- grid faults -- grid state -- distribution system state estimation -- protection assessment -- distributed generation units -- inverter -- regression analysis; Engineering -- Periodicals; Engineering; Electronic journals; Periodicals; 620.005
• DOI: 10.1049/joe.2018.0159
• Languages: English
• ISSNs: 2051-3305

Abstract

Abstract : The increasing number of inverter interfaced distributed generation units in electrical distribution grids can influence the functionality of protective devices in case of grid faults. The result can be an inadmissible delay in tripping time or failure to trip altogether. This study describes a novel approach to identify and amend potentially unreliable protection configurations. Reliance on conservative worst‐case approximations of the grid state is avoided by using distribution system state estimation instead. Thereby, protection configurations can be more accurately matched to the specific grids' requirements. The overall computational effort is reduced using methods of regression analysis while maintaining original accuracy.