摘要详情
385 / 2022-03-15 18:42:34
Influence of GFRP barrier thickness on the positive streamer propagation in an air-GFRP composite gap
GFRP,Streamer discharges,electrical breakdown,wind turbine blade,lightning
终稿
IEEE ICHVE 2022 / 1-PAGE ABSTRACT
Influence of GFRP barrier thickness on the positive streamer propagation in an air-GFRP composite gap
Bin Luo1, Jun Xu2, Zuofan Kang*1, Chaoying Fang2, Hengxin He1, Weijiang Chen3, Kai Bian3
(1.State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan, China, 430074
2. State grid Fujian electric power research institute, Fuzhou, China, 350000
3. State Grid Corporation of China, Beijing, China, 100031)
koto1958@qq.com
Purpose/Aim
The glass fiber reinforced polymer (GFRP) is a composite material widely used to manufacture wind turbine blades. The lightning puncture damage of GFRP blade has attracted much attention and the study on its formation is of great significance to the optimal design of effective lightning protection configuration of wind turbine blades. A coupling numerical simulation model was used to investigate the effect of GFRP thickness on the positive streamer pattern and electrical breakdown of GFRP laminate in air-GFRP gap.
Experimental/Modeling methods
A two-dimensional axisymmetric fluid dynamic model established is adopted to simulate streamer discharge in the air-GFRP composite needle-plate gap. The model considers not only the dynamics of charged particles in air and GFRP laminate, but also the current continuity on gas–solid interfaces and the electric field distortion due to space and surface charges, which can give a relatively comprehensive physical description of barrier effect of different solid materials, such as GFRP and carbon fiber reinforced polymer (CFRP).
Results/discussion
The figure shows the variations in the simulated average electric field Eav on the GFRP laminate when the thickness d is 0.4, 0.6, 0.8, and 1.0 mm, respectively. The variation of Eav can be divided into fifth stages in the cases of any GFRP thicknesses.
Conclusions
With the rise of GFRP thickness, the surface streamer on the upper surface exhibits a longer length and propagation velocity. In addition, the secondary streamer region expands, and the number of secondary streamer channels increases. Multiple secondary streamer channels can be attributed to the strengthening effect of the space charge and surface charge at the upper surface streamer head on the further electron accumulation pre-ionized at the lower surface streamer head. With a decrease of GFRP laminate thickness, the average electric field on the GFRP laminate rises, owing to the longer distance between the positive and negative surface charges and their decreased accumulation speed and amplitude. It can be inferred that the blade tip with a small GFRP blade thickness bears a stronger electric field than the blade root. This result is consistent with the actual operation experiences of wind turbines, where the breakdown of GFRP laminate mostly occurs at the blade tip.
Appendix (Figure, table, image…)
Influence of GFRP barrier thickness on the positive streamer propagation in an air-GFRP composite gap
Bin Luo1, Jun Xu2, Zuofan Kang*1, Chaoying Fang2, Hengxin He1, Weijiang Chen3, Kai Bian3
(1.State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan, China, 430074
2. State grid Fujian electric power research institute, Fuzhou, China, 350000
3. State Grid Corporation of China, Beijing, China, 100031)
koto1958@qq.com
Purpose/Aim
The glass fiber reinforced polymer (GFRP) is a composite material widely used to manufacture wind turbine blades. The lightning puncture damage of GFRP blade has attracted much attention and the study on its formation is of great significance to the optimal design of effective lightning protection configuration of wind turbine blades. A coupling numerical simulation model was used to investigate the effect of GFRP thickness on the positive streamer pattern and electrical breakdown of GFRP laminate in air-GFRP gap.
Experimental/Modeling methods
A two-dimensional axisymmetric fluid dynamic model established is adopted to simulate streamer discharge in the air-GFRP composite needle-plate gap. The model considers not only the dynamics of charged particles in air and GFRP laminate, but also the current continuity on gas–solid interfaces and the electric field distortion due to space and surface charges, which can give a relatively comprehensive physical description of barrier effect of different solid materials, such as GFRP and carbon fiber reinforced polymer (CFRP).
Results/discussion
The figure shows the variations in the simulated average electric field Eav on the GFRP laminate when the thickness d is 0.4, 0.6, 0.8, and 1.0 mm, respectively. The variation of Eav can be divided into fifth stages in the cases of any GFRP thicknesses.
Conclusions
With the rise of GFRP thickness, the surface streamer on the upper surface exhibits a longer length and propagation velocity. In addition, the secondary streamer region expands, and the number of secondary streamer channels increases. Multiple secondary streamer channels can be attributed to the strengthening effect of the space charge and surface charge at the upper surface streamer head on the further electron accumulation pre-ionized at the lower surface streamer head. With a decrease of GFRP laminate thickness, the average electric field on the GFRP laminate rises, owing to the longer distance between the positive and negative surface charges and their decreased accumulation speed and amplitude. It can be inferred that the blade tip with a small GFRP blade thickness bears a stronger electric field than the blade root. This result is consistent with the actual operation experiences of wind turbines, where the breakdown of GFRP laminate mostly occurs at the blade tip.
Appendix (Figure, table, image…)
重要日期
-
会议日期
09月25日
2022
至09月29日
2022
-
08月15日 2022
提前注册日期
-
09月10日 2022
报告提交截止日期
-
11月10日 2022
注册截止日期
-
11月30日 2022
初稿截稿日期
-
11月30日 2022
终稿截稿日期
主办单位
IEEE DEIS
承办单位
Chongqing University
联系方式
- Zhengyong Huang
- 61******@qq.com
历届会议
-
2020年09月06日 中国 Beijing
2020 IEEE International Conference on High Voltage Engineering and Application -
2018年09月10日 希腊
2018 IEEE International Conference on High Voltage Engineering and Application -
2016年09月19日 中国 Chengdu, China
2016 IEEE International Conference on High Voltage Engineering and Application
