Application of Energy-saving Drag Reduced Conductor on 110 kV Transmission Line in Coastal Typhoon Area

doi:10.11985/2020.03.008

Abstract

Abstract:

The wind drag coefficient and resistance loss of conventional overhead conductor is large, the application of this type of conductor in coastal typhoon area is not conducive to reduce the investment and improve the reliability of transmission line. Based on Zhongtian-Meizhou 110 kV transmission line project in Fujian province which is the first time to apply the drag reduced conductor in domestic transmission line, the change rule of wind resistance coefficient is obtained through wind tunnel test. At the same time, according to the characteristics of the transmission line in coastal strong wind area, comparing with the conventional conductors such as Aluminum conductor aluminum-cald steel reinforced, all aluminum alloy conductor and aluminum conductor alloy reinforced, the energy-saving drag reduced conductor is systematically analyzed from the aspects of transmission capacity, resistance loss, electrical performance, mechanical and load characteristics, project investment, economic evaluation, etc. The research shows that the drag reduced conductor has obvious advantages in energy saving, reduction of wind load on conductor and tower, reduction of investment, it has a good application prospect in the coastal typhoon area. Besides, the matching fittings which are suitable to the special structure of the drag reduced conductor are developed.

Key words: Transmission line, drag reduced conductor, energy-saving conductor, typhoon area, drag coefficient

CLC Number:

TM751

LIN Rui,WU Mingnian,YANG Long,CHEN Fubin,MIAO Yaojun,WENG Lanxi,SHEN Xingfeng. Application of Energy-saving Drag Reduced Conductor on 110 kV Transmission Line in Coastal Typhoon Area[J]. Journal of Electrical Engineering, 2020, 15(3): 57-64.

Figures/Tables 13

References 24

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项目		导线1	导线2	导线3	导线4
项目		JL/LB20A-300/40	JL3/LHA1-165/175	JLHA3-340	JLHA3X(DFY)-340
结构示意图
根数	铝(铝合金)	18	18	—	12
根数	钢(铝合金)	19	19	37	19
直径/mm	铝(铝合金)	3.42	3.42	—	4.16(X)
直径/mm	钢(铝合金)	3.42	3.42	3.42	3.40
计算面积/mm²	铝(铝合金)	165.35	165.35	—	—
	钢(铝合金)	174.54	174.54	339.9	335.61
	总计	339.89	339.89	339.9	335.61
直径/mm		23.94	23.94	23.94	22.7
单位重量/(kg/km)		1085.5	939.4	939.4	917.0
计算拉断力/kN		94.69	81.17	81.58	78.91
弹性模量/(kN·mm²)		69	55	55	55
膨胀系数×10^-6/℃		20.6	23	23	23
20℃直流电阻/(Ω/km)		0.092 1	0.090 5	0.088 7	0.088 8

导线型号	风速/(m/s)
导线型号	10	20	30	37	40	50
导线4	1.198	1.07	0.743	0.720	0.721	0.712
导线1	1.120	1.02	0.995	1.01	1.02	0.983

导线型号	导线温度/℃	允许载流量/A	极限输送容量/MW
导线1	80	643	116
导线2	80	658	119
导线3	80	649	117
导线4	80	649	117

导线型号	运行温度 /℃	运行温度交流电阻/(Ω/km)	电阻损耗/(kW/km)	电阻损耗差值/(kW/km)
导线1	46.78	0.102 9	41.06	0
导线2	46.42	0.098 6	39.32	-1.74
导线3	46.66	0.101 4	40.44	-0.62
导线4	46.46	0.098 7	39.37	-1.69

导线型号		导线1	导线2	导线3	导线4
设计安全系数		2.5	2.5	2.5	2.5
年均安全系数		4	4	4	4
最大应力/MPa		106.2	91.2	90.8	89.4
年均应力/MPa		66.3	57.0	56.7	55.8
拉重比m		8.90	8.86	8.81	8.77
大风过载/(m/s)	L_p=300 m	58.3	55.5	55.5	55.7
大风过载/(m/s)	L_p=400 m	54.5	53.3	53.1	53.3
高温弧垂/m	L_p=300 m	6.36	6.71	6.76	6.68
高温弧垂/m	L_p=400 m	11.08	12.36	12.44	12.25
风偏角/(°) (K_v=0.85)	大风工况	63.2	66.7	66.7	60.7
	操作工况	32.0	35.6	35.6	28.9
	雷电工况	22.5	25.3	25.3	19.5
	带电工况	10.4	11.8	11.8	9.1
V型串夹角/(°)		110	118	118	105