负直流电压下棒板间隙起晕电压计算方法

发布时间：2018-07-17 17:59

【摘要】：电晕放电是高压输电工程设计和运行中面临的突出问题。针对空气间隙,基于流注放电理论,以自持放电为判据,建立了考虑海拔温度影响的负直流电晕起始电压的光电离模型,并阐明了判据中各个参数的物理意义。提出一种基于臭氧检测原理的起晕电压检测试验方法,获得短间隙下棒板间隙不同电极尺寸的负直流起晕电压。在特高压工程技术(昆明)国家工程实验室(海拔2 100 m)测得负直流电压下阀厅金具试品的起晕电压。将两次试验数据以及文献中获取的试验数据分别与模型计算结果对比,发现两者在相同条件下的差异很小。文中提出的起晕电压预测方法有望为高压直流阀厅金具的电晕控制及设计提供有效的依据。
[Abstract]:Corona discharge is a prominent problem in the design and operation of high voltage transmission project. Based on the theory of streamer discharge and self-sustained discharge, a photoionization model for the initial voltage of negative DC corona considering the influence of altitude temperature is established, and the physical meaning of the parameters in the criterion is clarified. In this paper, a new method based on ozone detection principle is proposed to detect halo voltage. The negative DC corona initiation voltage with different electrode sizes between rod and plate gap is obtained under short gap. In the National Engineering Laboratory of Ultra-high Voltage Engineering (Kunming) (2100m above sea level), the corona initiation voltage of the test piece of the valve hall was measured under the negative DC voltage. Comparing the data of the two experiments and the experimental data obtained in the literature with the results of the model calculation, it is found that the difference between the two experiments is very small under the same conditions. The method proposed in this paper is expected to provide an effective basis for corona control and design of high-voltage DC valve hall fittings.
【作者单位】：武汉大学电气工程学院;国网福建省电力有限公司电力科学研究院;南方电网超高压公司;
【基金】：国家重点基础研究发展计划项目(973计划)(2011CB209404) 国家自然科学基金(51477120)~~
【分类号】：TM744

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