Observation method for discharge phenomena in gas discharge tests

Abstract

The invention relates to an observation method for discharge phenomena in gas discharge tests. A single or multiple single-lens reflective framing cameras are used as main observation tools, and accurately record discharge paths and arc attachment points in the high-voltage discharge tests conducted in indoor test rooms or outdoor test fields in the daytime or at night from different angles with the aid of adjustable neutral density filters, a wireless remote control device and tripods. The method includes deciding whether or not to add one neutral density filter to the front of each camera lens according to light intensity of a testing site, reasonably setting relevant parameters and adjusting the neutral density filters according to test conditions, connecting a wireless signal receiver with each camera, and controlling each camera to shoot the discharge phenomena by utilizing a wireless signal transmitter. By the observation method, the discharge paths and the arc attachment points in the gas discharge tests under various conditions can be recorded accurately, the method is economical and reliable, and the problem of incapability in observation or inaccuracy due to the fact that the existing high-voltage tests depend on visual observation and other observation methods can be solved.

Description

technical field [0001] The invention relates to a method for observing discharge phenomena in gas discharge tests, in particular to a method for observing discharge phenomena in gas discharge tests under various complex test conditions. Background technique [0002] Lightning strike is one of the main reasons for the failure of transmission lines and power equipment. Therefore, long air gap discharges are often used in laboratories to simulate natural lightning to study the lightning shielding performance of transmission lines; in external insulation tests, discharge tests are also necessary. During the discharge test, the observation of the arc attachment point (the object hit by the simulated lightning) and the discharge path is the most important part. In the simulated lightning strike test, the discharge time is on the order of microseconds, and it is very easy for observers to miss the moment of discharge or make mistakes in judgment. Therefore, relying on naked eye obs...

AI Technical Summary

Problems solved by technology

During the discharge test, the observation of the arc attachment point (the object hit by the simulated lightning) and the discharge path is the most important part. In the simulated lightning strike test, the discharge time is on the order of microseconds, and it is very easy for observers to miss the moment of discharge or make mistakes in judgment. Therefore, relying on naked eye observation will bring great errors to the test results; very few qualified scholars use high-speed cameras and other auxiliary equipment. Optoelectronic equipment is used to observe the detailed development process of the leader (streamer) in the long air gap discharge, but this kind of equipment is extremely expensive. For general discharge tests, it is not necessary to observe the detailed development process of the leader (streamer) during the discharge process. Just pay attention to the arc attachment point (the object hit by the simulated lightning) and the discharge path, and this kind of equipment is limited by the test conditions, the debugging process in the test preparation stage is cumbersome, it is difficult to get started, the practical range is small, and the use effect in the strong light environment is extremely ineffective ideal

Therefore, there are still great deficiencies and blind spots in the existing observation methods

Images