It was learned on October 26 that China Electric Power Research Institute Co., Ltd. has independently developed a 2 trillion-volt lightning pilot electric field full-time simulation test platform. The platform can simulate the real lightning electric field environment, study the lightning uplink pilot discharge process of the target object, reveal the lightning flash mechanism, optimize protection measures, and provide a new test platform for lightning mechanism research.
It is reported that the direct lightning strike and the subsequent electromagnetic effects generated are one of the important factors threatening the safety of high-voltage transmission and substation equipment, low-voltage information systems and other important facilities. UHV transmission lines are about 100 meters from the ground, and existing lightning simulation devices are built based on traditional electrical geometry models, which cannot accurately analyze the lightning bypass performance of UHV transmission line equipment under the influence of lightning head-on pilot, making it difficult to accurately guide the design of UHV engineering lightning protection, and urgently need to establish a lightning head-on pilot discharge equivalent simulation test platform.
Since 2014, the power technology team of CEC has conducted research on the full time and space simulation test method for the electric field in the near zone of lightning bypass of EHV transmission lines, and proposed a full time and space simulation method for the electric field in the near zone of lightning bypass under laboratory conditions. After a large number of voltage boosting tests and prototype trial production, the team independently developed a lightning pilot electric field full time and space simulation test platform. The platform successfully applies power electronics technology to the field of megavoltage testing, solving the problem of inequality of field sources in laboratory simulation of large scale lightning discharge and verification of lightning protection measures, which has important theoretical and application values for guiding the design and operation of lightning protection of UHV transmission and substation projects and improving the safety of UHV transmission system. The platform is also applicable to the lightning protection engineering design of large wind turbines and high-rise buildings.