Application of the Lyapunov algorithm to optimize the control strategy of low-voltage and high-current synchronous DC generator systems

Jinfeng Liu, Xiaohai Tan, Xudong Wang, Herbert Ho Ching Iu

Research output: Contribution to journalArticle

Abstract

In the present study, a novel multiple three-phase low-voltage and high-current permanent magnet synchronous generation system is proposed, which has only half-turn coils per phase. The proposed system is composed of a generator and two confluence plates with 108 rectifier modules. The output can reach up to 10,000 A continuous DC power supply, which is suitable for the outdoors and non-commercial power supply. The application of the Lyapunov algorithm in the synchronous rectification control was optimized. A current sharing loop control was added to the closed-loop control to ensure a stable output voltage and the output current sharing of each rectifier module. Since the two control variables solved by the Lyapunov algorithm were coupled and the negative definite function of the Lyapunov algorithm could not be guaranteed in this system, a simple decoupling method was used to decouple the control variables. Compared to the conventional control, the proposed strategy highly improved the dynamic performance of the system. The effectiveness of the proposed strategy was verified by the simulation. The 5 V/10,000 A hardware experiment platform was built, which proved the feasibility and validity of the proposed strategy for a high-power generation system.

Original languageEnglish
Article number871
JournalElectronics (Switzerland)
Volume8
Issue number8
DOIs
Publication statusPublished - 1 Aug 2019

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DC generators
Electric potential
Permanent magnets
Power generation
Hardware

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title = "Application of the Lyapunov algorithm to optimize the control strategy of low-voltage and high-current synchronous DC generator systems",
abstract = "In the present study, a novel multiple three-phase low-voltage and high-current permanent magnet synchronous generation system is proposed, which has only half-turn coils per phase. The proposed system is composed of a generator and two confluence plates with 108 rectifier modules. The output can reach up to 10,000 A continuous DC power supply, which is suitable for the outdoors and non-commercial power supply. The application of the Lyapunov algorithm in the synchronous rectification control was optimized. A current sharing loop control was added to the closed-loop control to ensure a stable output voltage and the output current sharing of each rectifier module. Since the two control variables solved by the Lyapunov algorithm were coupled and the negative definite function of the Lyapunov algorithm could not be guaranteed in this system, a simple decoupling method was used to decouple the control variables. Compared to the conventional control, the proposed strategy highly improved the dynamic performance of the system. The effectiveness of the proposed strategy was verified by the simulation. The 5 V/10,000 A hardware experiment platform was built, which proved the feasibility and validity of the proposed strategy for a high-power generation system.",
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Application of the Lyapunov algorithm to optimize the control strategy of low-voltage and high-current synchronous DC generator systems. / Liu, Jinfeng; Tan, Xiaohai; Wang, Xudong; Iu, Herbert Ho Ching.

In: Electronics (Switzerland), Vol. 8, No. 8, 871, 01.08.2019.

Research output: Contribution to journalArticle

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T1 - Application of the Lyapunov algorithm to optimize the control strategy of low-voltage and high-current synchronous DC generator systems

AU - Liu, Jinfeng

AU - Tan, Xiaohai

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AU - Iu, Herbert Ho Ching

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AB - In the present study, a novel multiple three-phase low-voltage and high-current permanent magnet synchronous generation system is proposed, which has only half-turn coils per phase. The proposed system is composed of a generator and two confluence plates with 108 rectifier modules. The output can reach up to 10,000 A continuous DC power supply, which is suitable for the outdoors and non-commercial power supply. The application of the Lyapunov algorithm in the synchronous rectification control was optimized. A current sharing loop control was added to the closed-loop control to ensure a stable output voltage and the output current sharing of each rectifier module. Since the two control variables solved by the Lyapunov algorithm were coupled and the negative definite function of the Lyapunov algorithm could not be guaranteed in this system, a simple decoupling method was used to decouple the control variables. Compared to the conventional control, the proposed strategy highly improved the dynamic performance of the system. The effectiveness of the proposed strategy was verified by the simulation. The 5 V/10,000 A hardware experiment platform was built, which proved the feasibility and validity of the proposed strategy for a high-power generation system.

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