Affiliation:
1. College of Electrical Engineering, Xinjiang University, Urumqi 830049, China
Abstract
This study presents an enhanced composite modular DC/DC converter topology designed to address critical technical requirements in wind power full DC systems, including high capacity, high conversion ratio, and fault isolation. The proposed topology combines MMC circuits and module combination circuits, allowing for exceptional modularity and configurability. Through the serial and parallel connection of multiple modules, the voltage or current levels can be further enhanced. Regarding the control strategy, the paper adopts SOGI phase-locked and coordinate transformation technology to precisely measure and control the differential and common-mode voltages within the MMC modules. A mathematical model is established, providing a theoretical foundation for experimental analysis. The research emphasizes the implementation of key strategies such as circulating current suppression, nearest level approximation, and capacitor voltage sorting. To validate the practicality and effectiveness of the proposed converter topology and control strategy, an experiment is conducted using a ±30 kV/±300 kV, 300 MW model constructed within the MATLAB/Simulink simulation environment.
Funder
National Key Research and Development Program of China
Reference25 articles.
1. Sankaranarayanan, V., Shirazi, M., Gao, Y., Ghosh, A., Erickson, R.W., and Maksimovic, D. (2019, January 16–19). Controller Hardware-in-the-Loop Validation of a Modular Control Architecture for a Composite DC-DC Converter. Proceedings of the 2019 20th Workshop on Control and Modeling for Power Electronics (COMPEL), Toronto, ON, Canada.
2. Akter, K., Motakabber, S.M.A., Alam, A.H.M.Z., and Yusoff, S.H.B. (2022, January 26–27). A New High Step-Up DC-DC Converter for Photovoltaic Application: Switch Inductor Cell Combined with Voltage Doubler Circuit. Proceedings of the 2022 International Conference on Recent Progresses in Science, Engineering and Technology (ICRPSET), Rajshahi, Bangladesh.
3. Mahdavi, M., Jurado, F., Schmitt, K., and Chamana, M. (2022). Electricity Generation from Cow Manure Compared to Wind and Photovoltaic Electric Power Considering Load Uncertainty and Renewable Generation Variability. IEEE Trans. Ind. Appl., early access.
4. Hybrid biomass, solar and wind electricity generation in rural areas of Fez-Meknes region in Morocco considering water consumption of animals and anaerobic digester;Mahdavi;Appl. Energy,2023
5. Bahirat, H.J., Mork, B.A., and Høidalen, H.K. (2012, January 22–26). Comparison of wind farm topologies for offshore applications. Proceedings of the IEEE Power and Energy Society General Meeting, San Diego, CA, USA.