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Open AccessArticle
Study on the Design of Series-Type All-DC Wind Farms Based on Half-Bridge Voltage Balancing Circuits
by
Xiaochen Su
Xiaochen Su 1,
Haiyun Wang
Haiyun Wang 1,*,
Zhanlong Li
Zhanlong Li 2 and
Qianyu Ma
Qianyu Ma 1
1
College of Electrical Engineering, Xinjiang University, Urumqi 830047, China
2
Beijing Goldwind Science & Creation Wind Power Equipment Co., Ltd., Beijing 100176, China
*
Author to whom correspondence should be addressed.
Electronics 2024, 13(19), 3839; https://doi.org/10.3390/electronics13193839 (registering DOI)
Submission received: 27 August 2024
/
Revised: 23 September 2024
/
Accepted: 27 September 2024
/
Published: 28 September 2024
Abstract
Offshore wind farms connected in series, with each wind turbine connected in series with one another, enhance the coupling between them. Significant differences in wind speeds between neighboring DC wind turbines (DCWTs) might result in a substantial disparity in the output voltage, hence posing a risk of overvoltage. Nevertheless, implementing voltage-limiting configurations for DCWTs might lead to the dissipation of wind energy, thereby diminishing the wind farm’s capacity to deliver electricity. This work introduces a half-bridge voltage balancing circuit (HVBC) topology as a solution to the issue of DCWT output voltage changes affecting the stable operation of wind farms. The proposed HVBC topology is designed specifically for large-capacity series-connected all-DC wind farms where wind speed variations occur. This design achieves power decoupling for series-connected all-DC wind farms by providing current compensation to the series-connected DCWTs. A control strategy is devised by examining the decoupling principle and operational characteristics of the HVBC. A 60 kV/48 MW tandem-type all-DC wind farm model consisting of six DCWTs in series is built in Matlab/Simulink. The model is then simulated to evaluate its performance under conditions of unequal wind speed, rapid changes in wind speed, and wind turbine failure shutdown. This research verifies the feasibility of the HVBC topology and improves the stability of the series-type all-DC wind farm.
Share and Cite
MDPI and ACS Style
Su, X.; Wang, H.; Li, Z.; Ma, Q.
Study on the Design of Series-Type All-DC Wind Farms Based on Half-Bridge Voltage Balancing Circuits. Electronics 2024, 13, 3839.
https://doi.org/10.3390/electronics13193839
AMA Style
Su X, Wang H, Li Z, Ma Q.
Study on the Design of Series-Type All-DC Wind Farms Based on Half-Bridge Voltage Balancing Circuits. Electronics. 2024; 13(19):3839.
https://doi.org/10.3390/electronics13193839
Chicago/Turabian Style
Su, Xiaochen, Haiyun Wang, Zhanlong Li, and Qianyu Ma.
2024. "Study on the Design of Series-Type All-DC Wind Farms Based on Half-Bridge Voltage Balancing Circuits" Electronics 13, no. 19: 3839.
https://doi.org/10.3390/electronics13193839
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