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| Progress of Technology for Environment-Friendly Gas Insulated Transmission Line |
| Gao Keli1, Yan Xianglian1, Liu Yan1, Wang Baoshan2, Hu Shizhuo2, Li Zhichuang3 |
1. State Key Laboratory of Power Grid Environmental Protection China Electric Power Research Institute Beijing 100192 China;
2. School of Electrical Engineering and Automation Wuhan University Wuhan 430072 China;
3. School of Electrical Engineering Xi'an Jiaotong University Xi'an 710049 China |
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Abstract In order to reduce the greenhouse effect of SF6 gas, it is necessary to investigate the environment-friendly gas insulated transmission line (EGIL) with free SF6 gas for environmental benefits of equipment. From three aspects, including the molecular design and synthesis of preparation for environment-friendly insulation gas, insulation performance and gas-solid material compatibility, 1 000kV EGIL prototype development and operational technology, the research status was summarized in this paper. The replacement optimal design and hybrid design method for new substitution environment-friendly gases has been established. The proposal of insulation design basis with C4F7N gas mixture was provided. The support insulators and pipeline prototype for 1 000kV EGIL has been manufactured, and the operation and maintenance system of EGIL was set up. Some main problems of EGIL to be resolved further has been put forward, including the synthesis and preparation technology for new environment-friendly gas, arc extinguishing and its recovery characteristics of C4F7N gas mixture, operation and maintenance strategy of EGIL et al. In order to master the key technology of C4F7N environment-friendly insulation gas and its application of equipment, all the achievements will provide the beneficial reference for the development and operation of environment-friendly electrical equipment.
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Received: 14 August 2019
Published: 17 January 2020
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2020, Vol. 35 
