An Improved Droop Control Method for Multi-Terminal VSC-HVDC Converter Stations

Hao Wang, Yue Wang, Guozhao Duan, Weihao Hu, Wenti Wang and Zhe Chen
Additional contact information
Hao Wang: Power Electronics & Renewable Energy Research Center, Xi’an Jiaotong University, No. 28, Xianning West Road, Xi’an 710049, China
Yue Wang: Power Electronics & Renewable Energy Research Center, Xi’an Jiaotong University, No. 28, Xianning West Road, Xi’an 710049, China
Guozhao Duan: Power Electronics & Renewable Energy Research Center, Xi’an Jiaotong University, No. 28, Xianning West Road, Xi’an 710049, China
Weihao Hu: Department of Energy Technology, Aalborg University, Pontoppidanstraede 101, Aalborg DK-9220, Denmark
Wenti Wang: Power Electronics & Renewable Energy Research Center, Xi’an Jiaotong University, No. 28, Xianning West Road, Xi’an 710049, China
Zhe Chen: Department of Energy Technology, Aalborg University, Pontoppidanstraede 101, Aalborg DK-9220, Denmark

Energies, 2017, vol. 10, issue 7, 1-13

Abstract: Multi-terminal high voltage direct current transmission based on voltage source converter (VSC-HVDC) grids can connect non-synchronous alternating current (AC) grids to a hybrid alternating current and direct current (AC/DC) power system, which is one of the key technologies in the construction of smart grids. However, it is still a problem to control the converter to achieve the function of each AC system sharing the reserve capacity of the entire network. This paper proposes an improved control strategy based on the slope control of the DC voltage and AC frequency (V–f slope control), in which the virtual inertia is introduced. This method can ensure that each AC sub-system shares the primary frequency control function. Additionally, with the new control method, it is easy to apply the secondary frequency control method of traditional AC systems to AC/DC hybrid systems to achieve the steady control of the DC voltage and AC frequency of the whole system. Most importantly, the new control method is better than the traditional control method in terms of dynamic performance. In this paper, a new control method is proposed, and the simulation model has been established in Matlab/Simulink to verify the effectiveness of the proposed control method.

Keywords: hybrid power system; slope control; virtual inertia; frequency control (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View complete reference list from CitEc
Citations: View citations in EconPapers (5)

Downloads: (external link)
https://www.mdpi.com/1996-1073/10/7/843/pdf (application/pdf)
https://www.mdpi.com/1996-1073/10/7/843/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:10:y:2017:i:7:p:843-:d:102455

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().