Study on Low-Frequency Ripple Voltage Suppression for Cascaded Three-Phase Solid-State-Transformer
- Resource Type
- Conference
- Authors
- Luo, Xiaolei; Chen, Min; Hu, Changsheng
- Source
- 2023 11th International Conference on Power Electronics and ECCE Asia (ICPE 2023 - ECCE Asia) Power Electronics and ECCE Asia (ICPE 2023 - ECCE Asia), 2023 11th International Conference on. :805-810 May, 2023
- Subject
- Components, Circuits, Devices and Systems
Engineering Profession
Fields, Waves and Electromagnetics
General Topics for Engineers
Power, Energy and Industry Applications
Robotics and Control Systems
Transportation
Harmonics suppression
Simulation
Capacitors
Asia
Power transmission
Power system harmonics
Harmonic analysis
Harmonic injection
harmonic suppression control
solid-state-transformer
- Language
- ISSN
- 2150-6086
Cascaded solid-state-transformer (SST) suffers from double-line-frequency ripple power because of its phase-separated structure, which causes ripple voltage in DC bus capacitor. In order to suppress the low-frequency ripple voltage, this paper proposes a control scheme with AC voltage harmonic injection and DC voltage harmonic suppression which suitable for three-phase SST. The control scheme regulates both the front-end CHB converter and the back-end LLC converters to transfer ripple power to output completely. A simple third harmonic injection loop is added to CHB controller. LLC converter regulates bus voltage in order to keep voltage balance. Harmonic voltage suppression loops are added to LLC controller to facilitate the ripple power transmission to output. Simulations are carried out first to preliminarily verify the feasibility of proposed control scheme.