Impact of Uncertainties on Resonant Overvoltages

Document identifier: oai:DiVA.org:ltu-76912
Keyword: Engineering and Technology, Electrical Engineering, Electronic Engineering, Information Engineering, Other Electrical Engineering, Electronic Engineering, Information Engineering, Teknik och teknologier, Elektroteknik och elektronik, Annan elektroteknik och elektronik, Electromagnetic transients, PSCAD, Resonance, Temporary overvoltages, Electric Power Engineering, Elkraftteknik
Publication year: 2019
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Abstract:

A number of changes in the power system have increased the risk for more serious resonances in the harmonic frequency range. The changes also result in an increased uncertainty with regard to the frequency and damping of those resonances. Uncertainties could be related to variations with time, uncertain future developments in the grid, and the modelling of individual components. In this article, a distinction is made between discrete and continuous stochastic uncertainties. This article further investigates uncertainties affecting resonant overvoltages. Several study cases investigating the impact of different uncertainties on resonances and temporary overvoltages, performed in PSCAD, are presented. The results show that some uncertainties may have a significant impact on the resulting impedance characteristics and potentially on the resulting overvoltage levels.

Authors

Oscar Lennerhag

Independent Insulation Group, Ludvika, Sweden
Other publications >>

Math H.J. Bollen

Luleå tekniska universitet; Energivetenskap
Other publications >>

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        identifier: oai:DiVA.org:ltu-76912
        datestamp: 2021-06-10T23:05:42Z
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                version: 3.7
            recordInfo: 
                recordContentSource: ltu
                recordCreationDate: 2019-11-28
            identifier: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-76912
            titleInfo: 
                @attributes: 
                    lang: eng
                title: Impact of Uncertainties on Resonant Overvoltages
            abstract: 
A number of changes in the power system have increased the risk for more serious resonances in the harmonic frequency range. The changes also result in an increased uncertainty with regard to the frequency and damping of those resonances. Uncertainties could be related to variations with time uncertain future developments in the grid and the modelling of individual components. In this article a distinction is made between discrete and continuous stochastic uncertainties. This article further investigates uncertainties affecting resonant overvoltages. Several study cases investigating the impact of different uncertainties on resonances and temporary overvoltages performed in PSCAD are presented. The results show that some uncertainties may have a significant impact on the resulting impedance characteristics and potentially on the resulting overvoltage levels.

            subject: 
                    @attributes: 
                        lang: eng
                        authority: uka.se
                    topic: 
                        Engineering and Technology
                        Electrical Engineering Electronic Engineering Information Engineering
                        Other Electrical Engineering Electronic Engineering Information Engineering
                    @attributes: 
                        lang: swe
                        authority: uka.se
                    topic: 
                        Teknik och teknologier
                        Elektroteknik och elektronik
                        Annan elektroteknik och elektronik
                    @attributes: 
                        lang: eng
                    topic: electromagnetic transients
                    @attributes: 
                        lang: eng
                    topic: PSCAD
                    @attributes: 
                        lang: eng
                    topic: resonance
                    @attributes: 
                        lang: eng
                    topic: temporary overvoltages
                    @attributes: 
                        lang: eng
                        authority: ltu
                    topic: Electric Power Engineering
                    genre: Research subject
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                        lang: swe
                        authority: ltu
                    topic: Elkraftteknik
                    genre: Research subject
            language: 
                languageTerm: eng
            genre: 
                conference/other
                ref
            note: 
                Published
                2
                
Finansiär: Svenska kraftnät; Energiforsk – The Swedish Energy Research Center

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                        Lennerhag
                        Oscar
                        1989-
                    role: 
                        roleTerm: aut
                    affiliation: Independent Insulation Group Ludvika Sweden
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                        osclen
                        0000-0002-0417-6404
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                        Bollen
                        Math H.J.
                    role: 
                        roleTerm: aut
                    affiliation: 
                        Luleå tekniska universitet
                        Energivetenskap
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                        matbol
                        0000-0003-4074-9529
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                    titleInfo: 
                        title: Proceedings of the International Conference on Power Systems Transients 2019 (IPST 2019)
                    @attributes: 
                        type: series
                    titleInfo: 
                        title: Proceedings of the International Conference on Power Systems Transients (IPST)
                    identifier: 2434-9739
            originInfo: 
                dateIssued: 2019
                publisher: International Conference on Power Systems Transients
            location: 
                url: https://www.ipstconf.org/papers/Proc_IPST2019/19IPST030.pdf
            accessCondition: gratis
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