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dc.contributor.authorKwon, Do-Hoon
dc.contributor.authorKim, Young-Jin
dc.contributor.authorGomis Bellmunt, Oriol
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Elèctrica
dc.identifier.citationKwon, D.; Kim, Y.; Gomis-Bellmunt, O. Optimal dc voltage and current control of an lcc hvdc system to improve real-time frequency regulation in rectifier-and inverter-side grids. "IEEE transactions on power systems", 1 Novembre 2020, vol. 35, núm. 6, p. 4539-4553.
dc.description© 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works
dc.description.abstractHigh-voltage direct-current (HVDC) systems for constant or intermittent power delivery have recently been developed further to support grid frequency regulation (GFR). This paper proposes a new control strategy for a line-commutated converter-based (LCC) HVDC system, wherein the dc-link voltage and current are optimally regulated to improve real-time GFR in both rectifier- and inverter-side grids. A dynamic model of an LCC HVDC system is developed using the dc voltage and current as input variables, and is integrated with feedback loops for inertia emulation and droop control. A linear quadratic Gaussian (LQG) controller is also designed for optimal secondary frequency control, while mitigating conflict between the droop controllers of HVDC converters. An eigenvalue analysis is then conducted, focusing on the effects of model parameters and controller gains on the proposed strategy. Simulation case studies are performed using the models of a real HVDC system and a CIGRE benchmark system. The case study results confirm that the proposed strategy enables the HVDC system to improve GFR, in coordination with generators in both-side grids, by exploiting the fast dynamics of HVDC converters. The proposed strategy is also effective under various conditions for the LQG parameters, inertia emulation, and droop control.
dc.format.extent15 p.
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.subjectÀrees temàtiques de la UPC::Enginyeria electrònica
dc.subjectÀrees temàtiques de la UPC::Enginyeria elèctrica
dc.subject.lcshElectric currents, Direct
dc.subject.lcshPower electronics
dc.subject.otherDC voltage and current
dc.subject.otherDroop control
dc.subject.otherFrequency regulation
dc.subject.otherHigh-voltage direct-current system
dc.subject.otherLine-commutated converter
dc.subject.otherLinear quadratic Gaussian
dc.subject.otherInertia emulation
dc.titleOptimal dc voltage and current control of an lcc hvdc system to improve real-time frequency regulation in rectifier-and inverter-side grids
dc.subject.lemacCorrents continus
dc.subject.lemacElectrònica de potència
dc.contributor.groupUniversitat Politècnica de Catalunya. CITCEA - Centre d'Innovació Tecnològica en Convertidors Estàtics i Accionaments
dc.rights.accessOpen Access
dc.description.versionPostprint (author's final draft)
local.citation.authorKwon, D.; Kim, Y.; Gomis-Bellmunt, O.
local.citation.publicationNameIEEE transactions on power systems

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