Optimal dc voltage and current control of an lcc hvdc system to improve real-time frequency regulation in rectifier-and inverter-side grids
| العنوان: | Optimal dc voltage and current control of an lcc hvdc system to improve real-time frequency regulation in rectifier-and inverter-side grids |
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| المؤلفون: | Oriol Gomis-Bellmunt, Young-Jin Kim, Do-Hoon Kwon |
| المساهمون: | Universitat Politècnica de Catalunya. Departament d'Enginyeria Elèctrica, Universitat Politècnica de Catalunya. CITCEA - Centre d'Innovació Tecnològica en Convertidors Estàtics i Accionaments |
| المصدر: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Droop control, Inertia emulation, Computer science, 020209 energy, Automatic frequency control, Energy Engineering and Power Technology, 02 engineering and technology, Linear-quadratic-Gaussian control, Rectifier, Control theory, Frequency grid, Power electronics, 0202 electrical engineering, electronic engineering, information engineering, Voltage droop, Linear quadratic Gaussian, Electrical and Electronic Engineering, Enginyeria elèctrica [Àrees temàtiques de la UPC], DC voltage and current, Enginyeria electrònica [Àrees temàtiques de la UPC], High-voltage direct-current system, Converters, Frequency regulation, Line-commutated converter, Control system, Electrònica de potència, Corrents continus, Electric currents, Direct |
| الوصف: | © 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 High-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. |
| وصف الملف: | application/pdf |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::506fe1bf63406f03871acfbb3f5f3e39 http://hdl.handle.net/2117/337046 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....506fe1bf63406f03871acfbb3f5f3e39 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |