Power flow calculation method and application of low-frequency alternating current transmission system for offshore wind power based on DRU

Authors

• Hao Yu, Grid Planning Research Center of Guangdong Power Grid Co .， Ltd.， Guangzhou 510080， China
• Yuwei Yao, China‑EU Institute for Clean and Renewable Energy at Huazhong University of Science & Technology ， Wuhan 430074， China
• Minjia Zheng, Grid Planning Research Center of Guangdong Power Grid Co .， Ltd.， Guangzhou 510080， China
• Honglin Chen, Grid Planning Research Center of Guangdong Power Grid Co .， Ltd.， Guangzhou 510080， China
• Zhengmin Zuo, Grid Planning Research Center of Guangdong Power Grid Co .， Ltd.， Guangzhou 510080， China
• Chenxin Yu, School of Electrical and Electronic Engineering ， Huazhong University of S cience and Technology ， Wuhan 430074， China
• Haishun Sun, School of Electrical and Electronic Engineering ， Huazhong University of S cience and Technology ， Wuhan 430074， ChinaFollow

Keywords

offshore wind power, low-frequency alternating current transmission, power flow calculation, node powersensitivity analysis

Abstract

The low-frequency alternating current transmission system for offshore wind power based on a diode rectifier unit (DRU) is a novel technical scheme with application prospects for the grid connection of deep-sea offshore wind power. Due to the uncontrollability of the DRU, the operation state of the low-frequency alternating current system is controlled by wind turbines using a grid-forming amplitude-phase control mode. To analyze the relationship between system operation state and wind power control characteristics, a power flow calculation model of the DRU-based low-frequency alternating current transmission system for offshore wind power was established. Definite conditions and equations to be solved were determined according to the system operation control mode, which accurately reflects the steady-state operation condition of the system under given wind power control. Based on the established power flow calculation model, the sensitivity of the amplitude-phase control mode and the system operation state under different output levels was analyzed, and the system power flow under different reactive power control strategies was compared. The analysis results provide a good reference for engineering planning and system control design.

DOI

10.19781/j.issn.1673-9140.2026.03.001

First Page

1

Last Page

14

Recommended Citation

Yu, Hao; Yao, Yuwei; Zheng, Minjia; Chen, Honglin; Zuo, Zhengmin; Yu, Chenxin; and Sun, Haishun (2026) "Power flow calculation method and application of low-frequency alternating current transmission system for offshore wind power based on DRU," Journal of Electric Power Science and Technology: Vol. 41: Iss. 3, Article 1.
DOI: 10.19781/j.issn.1673-9140.2026.03.001
Available at: https://jepst.researchcommons.org/journal/vol41/iss3/1