第
46
卷
第
12
期:
4106-4112
高电压技术
Vol.46, No.12: 4106-4112
2020
年
12
月
31
日
High Voltage Engineering December 31, 2020
DOI
: 10.13336/j.1003-6520.hve.20191402 2020
年
12
月
31
日第
46
卷
December
特高压 GIL 用绝缘子材料寿命试验及预测
陈
允
1,2
,崔博源
1
,黄常元
3
,张鹏飞
1,3
,金光耀
4
,侯亚峰
5
(
1.
中国电力科学研究院有限公司,北京
100192
;
2.
天津大学电气自动化与信息工程学院,天津
300072
;
3.
国家电网有限公司,北京
100031
;
4.
平高集团有限公司,平顶山
467001
;
5.
河南平高电气股份有限公司,平顶山
467001
)
摘 要:苏通气体绝缘金属封闭输电线路
(gas-insulated metal-enclosed transmission line
,
GIL)
管廊工程为国际上首
条特高压
GIL
输电工程,其电压等级高、输送容量大,要求可靠运行
40
年。
GIL
用绝缘子主体采用环氧树脂复
合材料浇注而成,其运行工况复杂,需同时耐受电、热、力的综合作用,且应用数量大,其材料寿命是影响
GIL
使用寿命的关键。对盆式绝缘子和三支柱绝缘子进行了运行工况下的电场和力场分析,分别得到了绝缘材料的耐
受电场最大值
(3.7 kV/mm)
和机械应力最大值
(5.5 MPa)
,并以此作为寿命试验的输入条件。为考核
GIL
绝缘子材料
的热电老化寿命,进行了热电老化试验,建立了绝缘材料的电气强度预测模型,预测绝缘材料在运行
40
年后的
电场强度为
18 kV/mm
;为考核
GIL
绝缘子材料的热机械寿命,进行了蠕变试验,建立了蠕变持久时间预测模型,
预测绝缘材料可在
26 MPa
的应力下可靠耐受
40
年。该文给出的试验方法能够综合考核绝缘子耐受电、热和机械
应力的能力,研究结论直接支撑了特高压
GIL
用绝缘子的设计定型。
关键词:特高压;
GIL
;绝缘子;热电老化试验;蠕变试验
Life Test and Prediction of Insulator Materials for UHV GIL
CHEN Yun
1,2
, CUI Boyuan
1
, HUANG Changyuan
3
, ZHANG Pengfei
1,3
, JIN Guangyao
4
, HOU Yafeng
5
(1. China Electric Power Research Institute, Beijing 100192, China; 2. School of Electrical and Information Engineering, Tianjin
University, Tianjin 300072, China; 3. State Grid Corporation of China, Beijing 100031, China; 4. Pinggao Group Co., Ltd., Ping-
dingshan 467001, China; 5. Henan Pinggao Electric Co., Ltd., Pingdingshan 467001, China)
1
Abstract:
Sutong gas-insulated metal-enclosed transmission line(GIL) pipeline gallery project is the first ultra high
voltage (UHV) GIL transmission project in the world, which has a high voltage level and large transmission capacity, and
is required to reliably operate for 40 years. The main body of the insulator for GIL, which is made of epoxy resin compo-
site material, works under the complex operation condition and needs to simultaneously withstand the comprehensive
action of electricity, heat and force, and has a large number of applications. The material life is the key to affect the ser-
vice life of GIL. Consequently, the electric field and force field of the basin-type insulator and the three-pillar insulator
under the operation conditions were analyzed. The maximum electric field withstand value (3.7 kV/mm) and the maxi-
mum mechanical stress value (5.5 MPa) of the insulating material were obtained, respectively, which were used as the
input conditions of the life test. In order to assess the thermoelectric aging life of GIL insulator materials, the thermoelec-
tric aging test was carried out, and an electrical strength prediction model of insulator materials was established. It is
predicted that the electrical strength of insulator insulation materials after 40 years of operation is 18 kV/mm. In order to
assess the thermomechanical life of GIL insulator materials, the creep test was carried out, and a creep lasting time pre-
diction model was established. It is predicted that the insulator insulation materials can endure 40 years under the stress of
26 MPa. The test method given in this paper can comprehensively evaluate the insulator’s ability of withstanding electric,
thermal and mechanical stress. The research conclusion can give direct supports to the design and finalization of insula-
tors for UHV GIL.
Key words:
UHV; GIL; insulator; thermoelectric aging test; creep test
———————
基金资助项目:国家电网有限公司科技项目
(
特高压
GIL
绝缘子、伸缩节及插接触头技术特性及质量管控研究
)(SGSHJY00JGJS1800083)
;国家重点研发计划
(2017YFB0903800)
。
Project supported by Science and Technology Project of SGCC(Study on technical characteristics and quality control of insulators, expansion joints and plug
contacts for UHV GIL)(SGSHJY00JGJS1800083), National Key R&D Program of China(2017YFB0903800).