期刊
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
卷 69, 期 3, 页码 2166-2179出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIE.2021.3063973
关键词
Automatic voltage control; Capacitors; Topology; Power system stability; Legged locomotion; Multilevel converters; Nonlinear dynamical systems; Back-stepping control (BSC); Lyapunov stability; modular multilevel converter (MMC); static synchronous compensator (STATCOM)
资金
- China Postdoctoral Science Foundation [2020M680880]
- National Natural Science Foundation of China [51625702, 52061635103]
- EPSRC [EP/T021969/1] Funding Source: UKRI
This article proposes a novel dual-layer back-stepping control method for the MMC-based STATCOM, which can achieve fast dynamic response and accurate tracking control with simplified structure and reduced computation burden.
With the high penetration of the power electronic loads in the grid, the stability of static synchronous compensator (STATCOM) devices is greatly challenged. However, the conventional control methods for the modular multilevel converter (MMC) based STATCOM only consider the stability with small signal disturbances. This article proposes a novel dual-layer back-stepping control (BSC) for the MMC-based STATCOM. In the first layer, the BSC aims to regulate the sum of the capacitor energy and the reactive output current. In the second layer, the BSC aims to control the circulating current. Therefore, the proposed method possesses a fast dynamic response and accurate tracking with the Lyapunov stability of the MMC-based STATCOM. Compared with the arm-control-based BSC for MMC-based inverters, the proposed method has a simplified structure and a reduced computation burden. Moreover, the proposed method realizes the independent control between the output current and the circulating current. The simulation and experimental results verify the effectiveness of the proposed method. In addition, its robustness toward different circuit parameters and the operation ability under unbalanced grid fault is also verified.
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