Optimal Data-Driven Control of an LCC HVDC System for Real-Time Grid Frequency Regulation
SCIE
SCOPUS
- Title
- Optimal Data-Driven Control of an LCC HVDC System for Real-Time Grid Frequency Regulation
- Authors
- Kwon D.-H.; Kim Y.-J.
- Date Issued
- 2020-03
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Abstract
- Recent advances in data sensing and processing technologies enable data-driven control of high-voltage direct-current (HVDC) systems for improving the operational stability of interfacing power grids. This paper proposes an optimal data-driven control strategy for an HVDC system with line-commutated converters (LCCs), wherein the dc-link voltage and current are optimally regulated at distinct HVDC terminals to improve frequency regulation (FR) in both rectifier- and inverter-side grids. Each HVDC converter is integrated with feedback loops for regulation of grid frequency and dc-link voltage in a localized manner. For optimal FR in both-side grids, a data-driven model of the HVDC-linked grids is then developed to design a data-driven linear quadratic Gaussian (LQG) regulator, which is incorporated with the converter feedback loops. Case studies on two different LCC HVDC systems are performed using the data-driven models, which are validated via comparisons with physics-based models and comprehensive MATLAB/SIMULINK models. The results of the case studies confirm that the optimal data-driven control strategy successfully exploits the fast dynamics of HVDC converters; moreover, cooperation of the HVDC system and synchronous generators in both-side grids is achieved, improving real-time FR under various HVDC system specifications, LQG parameters, and inertia emulation and droop control conditions.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/107233
- DOI
- 10.1109/ACCESS.2020.2981598
- ISSN
- 2169-3536
- Article Type
- Article
- Citation
- IEEE ACCESS, vol. 8, page. 58470 - 58482, 2020-03
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- There are no files associated with this item.
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