JWG C4/B4.38 Network Modelling for Harmonic Studies

Power system performance issues associated with steady-state harmonic voltage distortion is becoming even more pronounced as connection of nonlinear devices and/or loads increases driven by integration of renewable energy sources and connection of new HVDC converters. Proper harmonic voltage distortion performance specification is therefore crucial as it impacts the subsequent design of harmonic filters. In order to draw up proper specifications or limitations to coordinate the emission of harmonics onto the system, the vast majority of cases require proper modelling of the power system for this purpose. This in turn suggests the need for an appropriate model for each individual electrical plant. For example, the effect of resistive damping provided by certain plants is often ignored and it is important to establish clear guidelines as to how this should be taken into account.

Availability of information and guidance for such modelling requirements are either scarce or in scattered form, mostly delegated to appendices of various documents (examples are the short articles in Electra 164 and 167 published in 1996 and the recent TB 553). The source of many of these models has been lost in history, and reference can only be made to publications, some of them by CIGRÉ, which contain formulae for the representation of network components but with little or no proof of derivation. Both Electra articles are authoritative in nature but suffer from the issues outlined above, and are also becoming outdated and inaccessible. There is also a lack of guidance on the way of treating existing nonlinear loads embedded into the network. Loads at low voltages are usually not part of the larger transmission models and hence it is desirable to know the most suitable voltage level these should be connected to as an equivalent and how that equivalent should be represented. Therefore, there is a need for collating all the available information in the literature and formulating a study and modelling guidance document for practising power system engineers while performing harmonic voltage distortion analysis.

Terms of Reference (pdf, 55kB)

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Dr Zia EMINUnited KingdomConvenor
Dr John GingIrelandSecretary
Prof Detmar ArltGermanyMember (R) 
Dalton O C BrasilBrazilMember (R) 
Christoph BuchhagenGermanyMember (R) 
Lourdes Soto CanoSpainMember (R) 
Ms Aida Castro LobatoSpainMember (R) 
Prof Mark HalpinUSAMember (R) 
Stanko JankovicSerbiaMember (R) 
Dr Christian F. JensenDenmarkMember (R) 
Bahram KhodabakhchianCanadaMember (R) 
Lukasz KocewiakDenmarkMember (R) 
Dr Kah Leong KooUKMember (R) 
Christian LakenbrinkNetherlandsMember (R) 
Oscar Lennerhag SwedenMember (R) 
Kevin LorenzoFranceMember (R) 
Jose A R MonteiroUKMember (R) 
Dr Ram NathUSAMember (R) 
Mr Mihai OlteanuRomaniaMember (R) 
Emmanuel RutovicFranceMember (R) 
Minh Nguyen TuanFranceMember (R) 
Ms Marta Val EscuderoIrelandMember (R) 
Dr Ivan ValadeItalyMember (R) 
Pei WangCanadaMember (R) 
Dr Xueguang WuChinaMember (R) 
Prof Claus Leth BakDenmarkMember (O)
Remus BeresDenmarkMember (O)
Bryan ButerbaughUSAMember (O)
Prof. Dr.-Ing. Jutta HansonGermanyMember (O)
Dr Genevieve LietzGermanyMember (O)
Terry MartinichCanadaMember (O)
David PeteschFranceMember (O)
Lei ShuaiDenmarkMember (O)
Daniel TingUKMember (O)
Dr Davor VujatovicUKMember (O)
Dr Naoki GiboJapanMember (C)
Dr Isao IyodaJapanMember (C)
Thomas MaggSouth AfricaMember (C)
Dr Nigel ShoreUKMember (C)
Dominic VinetCanadaMember (C)
Reigh A. WallingUSAMember (C)