尖-板电晕放电光谱分析

Spectrum Analysis of Tip-Plane Corona Discharges

电晕放电是高电压设备中的一种典型的具有危害性的物理过程。对其物理机制进行分析,以及对其进行早期检测以便预防其发展,有助于提高电力绝缘系统的使用寿命和安全可靠程度。本文建立了一套高灵敏度的光谱分析系统,对空气中几种不同放电条件下的电晕放电进行了光谱分析。结果表明,电晕放电光谱由连续谱、谱带和谱线三部分组成。此外,光谱在红外区、可见光区和紫外区的辐射具有不同的特征,辐射强度随具体放电条件的变化规律也各不相同。与文献中的结果进行比较,发现各种条件下的电晕放电的可见光区辐射强度一般都比较弱,而紫外区与红外区辐射的强弱则与具体的放电条件有关。

Corona is a typical physics process that may occur in the gas-insulated system of a high voltage apparatus. Studying on the physical mechanism of corona and detecting earlier to prevent corona from developing are helpful to improve the life time and reliability of the electrical insulated system. In this paper, a spectrum analysis system with high sensitivity has been set up, and corona spectra in air were obtained under several different discharge conditions. The results indicate that corona spectra consist of continuous spectrum, spectral bands and lines. Moreover, spectra have different characterstics in infrared, visible and ultraviolet regions, respectively. With the change of discharge conditions, the radiation intensity in each region changes differently. Compared with the results in the literature, it was found that the visible radiation intensity is usually weak, while ultraviolet and infrared radiation intensities depend on the discharge conditions.