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The reliability of UHV transmission system is important to the power grid and live working technology is a key method to cope with line components defects or fault without outage plan. In order to satisfy the design requirement of the UHV compact transmission lines, and to provide parameters for live line maintenance on those transmission lines, the air gaps switching impulse voltage discharge tests...
The safety operation of UHV transmission lines is important to the power grid and live working technology is a key method to cope with line components defects or fault without outage plan. In order to ensure the safety of live line workers and electrical equipment, the workers entering into equal-potential must select proper accessing path and satisfy the requirement of minimum complex gaps. Live...
Live working technology is to ensure the safe operation of UHV transmission lines is an important technical means, and the security and stability to equal-potential is a key link for live working. UHV line tension insulator string length, the distance between united and dip Angle, etc is bad for workers along the insulator into the equal-potential. For workers from jumping into the equal-potential...
Along with the construction and development of UHV project, the steel tubular towers have been widely used in projects of UHV transmission lines. In order to ensure the safety of live working on UHV steel tubular tower transmission lines, this article compares the electric field distributions around UHV steel tubular tower and angle-steel tower through simulating calculation; obtained the impulse...
The reliable and stable operation of ultra HVDC transmission system contributes to the safe operation of the power grid, thus to carry out live working is of great significance in converter station. Shift of potential is the most important aspects of entering equal-potential. At the moment of shift of potential, the strong arc and large pulse current will occur between the bus and operation worker...
Live working in substation is of importance to ensure the reliability of power system. Minimum approach distance and complex gaps are key parameters for safety of workers and electric equipment in substation. The discharge characteristic curves corresponding to four live working gap configuration in substation, such as "equalpotential personnel-grounding structures", "equipotential...
With the rapid development of power grid in China, EHV/UHV transmission lines have been constructed and operated successively. Live working is important technical means to make sure these lines reliability. In order to carry out live working on the transmission lines, key technical parameters of live working were obtained by experiment and theoretical calculation, and the safety protective principle...
The switching impulse discharge performances of live working electric structure on outer phase, middle phase and tension string in 1000kV AC transmission line were studied. And based on the results, by calculation and analysis of the risk of live working, the minimum approach distance for live working was determined.
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