A control parameter analysis method based on a transfer function matrix of hybrid multi-terminal HVDC system with flexible adaptability for different operation modes

• Published in: International journal of electrical power & energy systems Vol. 116; p. 105584
• Main Authors: Chen, Xinquan, Liang, Yuansheng, Wang, Gang, Li, Haifeng, Li, Bingkun, Guo, Zhu
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.03.2020
• Subjects: Control parameter analysis method; Hybrid multi-terminal HVDC system; Operation mode; Small-signal model; Transfer function matrix; Small-signal model; Transfer function matrix; Hybrid multi-terminal HVDC system; Operation mode; Control parameter analysis method
• ISSN: 0142-0615; 1879-3517
• DOI: 10.1016/j.ijepes.2019.105584

•A generic small-signal model for Hybrid-MTDC systems with flexible adaptability for different operation modes.•A time-frequency-domain quantitative analysis method for Hybrid-MTDC systems utilizing the transfer function matrix.•Investigate the feasible regions and dynamic performance of a 3-termial Hybrid HVDC system. To achieve better controller performance, the impact of control parameters on the stability and dynamic performance is essential to be clarified mathematically for hybrid multi-terminal HVDC (Hybrid-MTDC) systems considering different operation modes (OMs). In this paper, a generic small-signal model (SSM) is established, which can be modified flexibly for different OMs. Then the SSM can be converted into a transfer function matrix (TF-Matrix), which avoids deriving the transfer function separately for each controller of the system, and greatly improves the work efficiency. By inputting a step into the TF-Matrix, the time-domain mathematical model for the all system state variables can be obtained, and it is more efficient than iterative solutions of high-order differential equations. To this end, a quantitative control parameter analysis method based on a TF-Matrix is proposed. Utilizing the proposed method, a typical Hybrid-MTDC system is investigated, and the results demonstrate the practicality and accuracy of the proposed method.