Droop Frequency Limit Control and Its Parameter Optimization in VSC-HVDC Interconnected Power Grids

Han Jiang, Yichen Zhou, Yi Gao and Shilin Gao ()
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Han Jiang: Global Energy Interconnection Development and Cooperation Organization, Beijing 100031, China
Yichen Zhou: College of Electrical Engineering, Sichuan University, Chengdu 610065, China
Yi Gao: Global Energy Interconnection Development and Cooperation Organization, Beijing 100031, China
Shilin Gao: College of Electrical Engineering, Sichuan University, Chengdu 610065, China

Energies, 2024, vol. 17, issue 15, 1-18

Abstract: With the gradual emergence of trends such as the asynchronous interconnection of power grids and the increasing penetration of renewable energy, the issues of ultra-low-frequency oscillations and low-frequency stability in power grids have become more prominent, posing serious challenges to the safety and stability of systems. The voltage-source converter-based HVDC (VSC-HVDC) interconnection is an effective solution to the frequency stability problems faced by regional power grids. VSC-HVDC can participate in system frequency stability control through a frequency limit controller (FLC). This paper first analyses the basic principles of how VSC-HVDC participates in system frequency stability control. Then, in response to the frequency stability control requirements of the sending and receiving power systems, a droop FLC strategy is designed. Furthermore, a multi-objective optimization method for the parameters of the droop FLC is proposed. Finally, a large-scale electromagnetic transient simulation model of the VSC-HVDC interconnected power system is constructed to verify the effectiveness of the proposed droop FLC method.

Keywords: ultra-low-frequency oscillations; low frequency; regional interconnected system; VSC-HVDC; droop control; frequency limit controller (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: 2024
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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