Abstract
High-voltage insulators are one of the devices widely used in power systems, and their pros and cons are directly related to the safe and stable operation of the power system. The large-tonnage UHV insulator AC withstand voltage detection method is restricted by conditions at the engineering site, and the detection efficiency is low and difficult to implement. The research on the method of detecting UHV zero-value insulators using high-voltage pulses and the development of portable detection devices are of great significance. This article has completed the portable insulator detection device using a miniaturized high-voltage pulse test power supply. The developed portable UHV zero-value insulator detection device can effectively judge zero-value, low-value and high-value UHV insulators, and adapt to large quantities of UHV insulators. Requirements for efficient testing.
Highlights
High-voltage insulators are one of the widely used equipment in power systems, and their pros and cons are directly related to the safety and stable operation of the power system[1]
The zero value problem of UHV porcelain insulators has become more frequent in new operations and grid-connected operations, which has given rise to cross-regional power grids
The AC withstand voltage test method for large-tonnage UHV insulators is limited by conditions at the project site, and the detection efficiency is low and difficult to implement
Summary
High-voltage insulators are one of the widely used equipment in power systems, and their pros and cons are directly related to the safety and stable operation of the power system[1]. According to the "1000kV system electrical installation engineering equipment handover test standard" (GB/T 50832-2013), the suspension insulator handover test should meet two requirements: a 5000V megohmmeter should be used to measure the insulation resistance of each suspension insulator before installation. It should not be lower than 500MΩ; AC withstand voltage test should be carried out, and the test voltage value should be 60kV. In order to realize the rapid and accurate detection of large-tonnage zero-value or low-value high-voltage insulators on site, it is urgent to carry out research on the zero-value test method of large-tonnage porcelain insulators for UHV transmission lines and develop portable and effective test devices
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