TY - JOUR
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
AU - Wang, Xudong
AU - Iu, Herbert Ho Ching
PY - 2019/8/1
Y1 - 2019/8/1
N2 - 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.
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.
KW - Confluence plate
KW - Current sharing control
KW - Low-voltage and high-current
KW - Lyapunov algorithm
UR - http://www.scopus.com/inward/record.url?scp=85071130840&partnerID=8YFLogxK
U2 - 10.3390/electronics8080871
DO - 10.3390/electronics8080871
M3 - Article
AN - SCOPUS:85071130840
SN - 2079-9292
VL - 8
JO - Electronics (Switzerland)
JF - Electronics (Switzerland)
IS - 8
M1 - 871
ER -