Research on Current Carrying Capacity and Temperature Rise of 66 kV Wind Turbine Cable with High Thermal Conductivity

doi:10.11985/2023.01.027

Abstract

Abstract:

The construction of a new power system with offshore wind plant as the main new power supply is a major strategy to achieve the goal of carbon peak and carbon neutrality. 66 kV flexible cable, as the key equipment, has become the mainstream power collection method for offshore wind turbines above 10 MW, but its working environment and heat dissipation conditions are poor, so it is urgent to improve the ampacity of this type of cable. Therefore, the main insulation and sheath materials with high thermal conductivity are prepared, and the ampacity improvement effect of high thermal conductivity 66 kV wind turbine cable is simulated by finite element simulation, and the temperature distribution of high thermal conductivity cable under different loads is calculated by analytical method. It is found that the modified materials have better electrical insulation performance than the raw materials, and the thermal conductivity of insulating materials and sheath materials are increased by 90% and 52% respectively, and the ampacity of 66 kV wind turbine cable is increased from 682 A to 720.2 A. Under the same load current, the maximum temperature of high thermal conductivity cable decreases by 8.4 ℃. The research results provide an effective method for improving the ampacity of high-voltage wind turbine cables, and provide relevant reference for the simulation calculation of high-voltage three-core cables.

Key words: Wind turbine cable, finite element simulation, high thermal conductivity material, ampacity, temperature rise

CLC Number:

TM561

LI Jin, LIU Songtao, XU Jing, ZOU Kun, ZHU Wenbo, WANG Chuanbin, DU Boxue. Research on Current Carrying Capacity and Temperature Rise of 66 kV Wind Turbine Cable with High Thermal Conductivity[J]. Journal of Electrical Engineering, 2023, 18(1): 244-250.

Figures/Tables 13

References 20

[1]	Global Wind Energy Council. Global wind report 2021[R]. Brussels: GWEC, 2021.
[2]	GULDBRANDTSEN M, LASSEN S. Global offshore wind power report[R]. MAKE Consulting, 2018.
[3]	黄炳融, 王威望, 李盛涛, 等. 热老化交联聚乙烯绝缘状态评估和介电参数计算的新型电荷表征和分析方法[J]. 电气工程学报, 2021, 16(2):25-32.
	HUANG Bingrong, WANG Weiwang, LI Shengtao, et al. Study on dynamic charge characteristics of thermal aging XLPE based on direct current integral charge technique[J]. Journal of Electrical Engineering, 2021, 16(2):25-32.
[4]	蔡蓉, 张立波, 程濛, 等.66 kV海上风电交流集电方案技术经济性研究[J]. 全球能源互联网, 2019, 2(2):155-162.
	CAI Rong, ZHANG Libo, CHENG Meng, et al. Technical and economic research on 66 kV offshore wind power AC collection[J]. Journal of Global Energy Interconnection, 2019, 2(2):155-162.
[5]	冯涛, 李浩浩, 李斌, 等. 绝缘减薄对电缆载流量的影响[J]. 电线电缆, 2019(6):12-14.
	FENG Tao, LI Haohao, LI Bin, et al. The influence of thinning insulation thickness on cables current rating[J]. Electric Wire & Cable, 2019(6):12-14.
[6]	李进, 王义方, 孔晓晓, 等. 电动汽车用高导热车载线温度场分布与载流量分析[J]. 绝缘材料, 2021, 54(2):68-74.
	LI Jin, WANG Yifanng, KONG Xiaoxiao, et al. Analysis on ampacity and temperature distribution of electric vehicle cable with high thermal conductivity[J]. Insulating Materials, 2021, 54(2):68-74.
[7]	姜文政, 林瑛, 江平开, 等. 三维氮化硼结构及其导热绝缘聚合物纳米复合材料[J]. 电气工程学报, 2021, 16(2):12-24.
	JIANG Wenzheng, LIN Ying, JIANG Pingkai, et al. Three-dimensional structured boron nitride and its thermally conductive and electrically insulating composites[J]. Journal of Electrical Engineering, 2021, 16(2):12-24.
[8]	DU B X, KONG X X, CUI B, et al. Improved ampacity of buried HVDC cable with high thermal conductivity LDPE/BN insulation[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2017, 24(5):2667-2676. doi: 10.1109/TDEI.2017.006452
[9]	刘士利, 李宁, 蔡国伟, 等.66 kV交流交联聚乙烯电缆线路改为直流运行的直流载流量[J]. 高电压技术, 2017, 43(5):1664-1669.
	LIU Shili, LI Ning, CAI Guowei, et al. DC ampacity of 66 kV AC XLPE cable line transformed into DC operation[J]. High Voltage Engineering, 2017, 43(5):1664-1669.
[10]	王荣鹏, 李红发, 聂文翔, 等. 提升110 kV电缆载流量的试验研究[J]. 新型工业化, 2020, 10(2):45-49.
	WANG Rongpeng, LI Hongfa, NIE Wenxiang, et al. Experimental research on improving the carrying capacity of 110 kV cable[J]. The Journal of New Industriallization, 2020, 10(2):45-49.
[11]	郭磊, 赵海龙, 卢丽婷. 交联助剂对三元乙丙胶性能的影响[J]. 中国橡胶, 2020, 36(7):49-52.
	GUO Lei, ZHAO Hailong, LU Liting. Effect of crosslinking agent on properties of EPDM[J]. China Rubber, 2020, 36(7):49-52.
[12]	秦子川, 苏宏升. 基于改进威布尔分布的风电机组关键部件可靠性评估[J]. 电测与仪表, 2021, 58(3):68-73.
	QIN Zichuan, SU Hongsheng. Reliability evaluation of key components of wind turbine based on improved Weibull distribution[J]. Electrical Measurement and Instrumentation, 2021, 58(3):68-73.
[13]	申珅. 威布尔分布在产品可靠性分析中的应用[J]. 现代信息科技, 2020, 4(11):165-167.
	SHEN Shen. Application of Weibull distribution in product reliability analysis[J] Modern Information Technology, 2020, 4(11):165-167.
[14]	穆艳, 王永兴, 邹积岩, 等. 基于威布尔分布的真空断路器可靠性分析[J]. 高压电器, 2020, 56(1):30-35.
	MU Yan, WANG Yongxing, ZOU Jiyan, et al. Reliability analysis of vacuum circuit breaker based on Weibull distribution[J]. High Voltage Apparatus, 2020, 56(1):30-35.
[15]	黄宪武, 唐锦尧, 张庆波, 等. 基于多物理场有限元的开关柜温升仿真研究[J]. 浙江电力, 2020, 39(7):18-22.
	HUANG Xianwu, TANG Jinyao, ZHANG Qingbo, et al. Simulation research on temperature rise of switch cabinet based on multi-physics finite element[J]. Zhejiang Electric Power, 2020, 39(7):18-22.
[16]	李红发, 王荣鹏, 罗应文, 等. 电缆线路载流量计算的热场仿真法研究[J]. 新型工业化, 2020, 10(1):49-54.
	LI Hongfa, WANG Rongpeng, LUO Yingwen, et al. Research on thermal field simulation method for calculation of ampacity of cable line[J]. The Journal of New Industriallization, 2020, 10(1):49-54.
[17]	马建伟, 尹轶珂, 王磊, 等. 基于三维温度场的电缆登杆对电缆群载流量的影响研究[J]. 电力科学与技术学报, 2019, 34(1):88-95.
	MA Jianwei, YIN Yike, WANG Lei, et al. 3D temperature field simulation of underground cables ampacity influenced by the climbing-pole cable[J]. Journal of Electric Power Science and Technology, 2019, 34(1):88-95.
[18]	李红雷, 李颖, 姚周飞, 等. 公路隧道中敷设电力电缆的温度场仿真研究[J]. 计算机仿真, 2019, 36(2):59-62,177.
	LI Honglei, LI Ying, YAO Zhoufei, et al. Simulation of thermal field of power cable installed in traffic tunnel[J]. Computer Integrated Manufacturing Systems, 2019, 36(2):59-62,177.
[19]	International Electrotechnical Commission.IEC 60287-1-1 Electric cables—Calculation of the current rating—Part 1-1:Current rating equations (100% load factor) and calculation of losses—General[S]. Geneva:IEC, 2014.
[20]	马国栋. 电线电缆载流量[M]. 北京: 中国电力出版社, 2003:22-28.
	MA Guodong. Wire and cable ampacity[M]. Beijing: Electric Power Press, 2003:22-28.

材料	导热系数/[W/(m·K)]
EPDM	0.40
高导热EPDM	0.76
CSM	0.42
高导热CSM	0.64

模型结构	导热系数/[W/(m·K)]	电导率/(S/m)	外径/mm
导体	400	1/k1	31
导体屏蔽	0.29	1×10^-5	34
绝缘层	0.40	2.05×10^-14	51
绝缘屏蔽	0.29	1×10^-5	54
金属护套	163	3.6×10⁷	59
带包层	0.42	1×10^-18	65
内护套层	0.21	1×10^-14	146
加强层	40.5	4.032×10⁶	150
外护套层	0.4	1×10^-15	158

参数	数值
参数	原电缆	高导热电缆
导体层损耗/(W/m)	83.04	92.73
金属屏蔽损耗/(W/m)	23.77	26.56
加强层损耗/(W/m)	0.65	0.72
载流量I/A	682.00	720.20

参数	数值	参数	数值
绝缘层热阻 T₁/(K·m·W^-1)	0.244	热阻系数ρ_t/(K·m·W^-1)	1.316
内衬层热阻 T₂/(K·m·W^-1)	0.102	换热系数h/[W/(m²·K)]	4.58
外护层热阻 T₃/(K·m·W^-1)	0.011	电阻R/(Ω/m)	6.506×10^-5
外部热阻 T₄/(K·m·W^-1)	0.160	载流量I/A	702