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| Research on Control Strategy of STATCOM Based on Cascaded H-Bridge |
| Zheng Baohong1, Xu Ziting2 |
1. Shanxi Ningwu Power Supply Company, Ningwu, Shanxi 036700;
2. Shanxi Xinzhou Power Supply Company, Xinzhou, Shanxi 034000 |
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Abstract This paper proposes a new PWM arithmetic based on virtual flux tracking for cascaded H-bridge STATCOM (Static Synchronous Compensator). Firstly, this paper establishes the virtual flux mathematical model, and obtain the PWM modulation arithmetic aimed at both virtual flux tracking and submodular capacitor voltage-balancing control. Then, per phase modulation signal can be determined by combining double closed loop control of STACOM. Finally, a simulation system is set up by Matlab/Simulink. The simulation results reveals that the proposed PWM arithmetic based on virtual flux tracking has a good modulation effects, and the submodular capacitor voltages can be balanced around reference value. At the same time, cascaded H-bridge STATCOM has a excellent dynamic response.
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Published: 22 December 2014
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2014, Vol. 15 
