A new experimental platform has been established for the study of lightning mechanism
The in-depth study of lightning mechanisms can provide strong technical support for the research and development of lightning protection products, lightning protection engineering design, and so on., China Electric Power Research Institute has launched a self-developed 2.0 MW lightning pilot electric field full time and space simulation test platform.
This platform can simulate the real lightning electric field environment, study the upward lead discharge process of the target object lightning, reveal the lightning grounding mechanism, optimize protective measures, and provide a new experimental platform for the study of lightning mechanism.
Direct lightning strikes and their subsequent electromagnetic effects are one of the important factors threatening the safety of high-voltage transmission and transformation equipment, low-voltage information systems, and other important facilities. The distance between the ultra-high voltage transmission line and the ground is about 100 meters. The existing lightning simulation device is built based on traditional electrical geometric models, which cannot accurately analyze the lightning shielding performance of ultra-high voltage transmission line equipment under the influence of lightning head-on lead. It is difficult to accurately guide the lightning protection design of ultra-high voltage engineering. It is urgent to establish an equivalent simulation test platform for lightning head-on lead discharge.
After a large number of voltage rise tests and prototype trials, the platform has successfully applied power electronics technology to the field of megavolt level high-voltage testing, solving the problem of field source non equivalence in laboratory simulation of large-scale lightning discharge and lightning protection measures verification. It has important theoretical and practical value for guiding the lightning protection design and operation of ultra-high voltage transmission and transformation projects, and improving the safety of ultra-high voltage transmission systems. This platform is also suitable for lightning protection engineering design of large wind turbines and high-rise buildings.
