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首页> 外文会议>IEEE International Conference on High Voltage Engineering and Application >Altitude Correction and Selection of Air Gap Discharge Voltage in Converter Stations in High Altitude Areas
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Altitude Correction and Selection of Air Gap Discharge Voltage in Converter Stations in High Altitude Areas

机译：高海拔地区转换器站中的气隙放电电压的高度校正和选择

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摘要

A converter station is an important part of an HVDC transmission project. The shielding fittings at the end of converter station equipment are generally large in size, and the air gap between them and the surrounding grounding body is much more approximate to a slightly uneven electric field. Its discharge characteristics are quite different from rod-plane, rod-rod and transmission tower gaps. With relatively few UHVDC converter stations located at an altitude of 2,000m and above, and few discharge test curves of air gaps available in the world, in order to ensure a reliable design of converter stations and valve halls in high altitude areas, typical gaps of valve halls and DC fields in converter stations are analyzed, and a variety of typical gaps are obtained, including sphere-ground, shpere-wall/ground, valve tower-ground, and the most typical gap is shpere-plane gap. Discharge tests of 1.5m sphere-plane gap in converter stations are conducted at 55m and 4,300m above sea level. The altitude correction methods of gap discharge voltage specified by IEC60071-2, IEC60060-1 are analyzed, and the difference of discharge voltage and variation law of gap factor in high-altitude areas obtained by different altitude correction methods are compared and analyzed. According to the SI discharge test results of 1.5m sphere-ground gap and rod-plane gap at different altitudes, the minimum air gap distance required for valve hall at converter stations above 4,000m and below is calculated and analyzed using different altitude correction methods and gap factors. Research results can be used in the design of valve hall and DC field of converter stations in high altitude areas. On the other hand, it provides basic data for altitude correction of long air gap in high altitude areas.
机译：转换器站是HVDC传输项目的重要组成部分。转换器站设备端的屏蔽配件尺寸通常大大，并且它们之间的气隙和周围接地体的气隙更近似于略微不均匀的电场。它的排放特性与杆面，杆杆和传输塔间隙非常不同。具有相对较少的UHVDC转换器站位于2000米及以上的海拔高度，并且世界上可用的空气差距的少量放电测试曲线，以确保在高海拔地区的转换器站和阀门大厅设计，典型的空白阀室和在变流器站DC场进行了分析，得到了各种典型的间隙的，包括球地面，shpere壁/接地，阀塔地面，和最典型的间隙shpere平面间隙。转换器站中1.5M球面间隙的放电测试在55米和4300米以上海平面进行。分析了IEC60071-2，IEC60060-1指定的间隙放电电压的高度校正方法，并进行了分析和分析了通过不同海拔校正方法获得的高空区域中的放电电压和间隙系数的差异差异。根据SI放电测试结果，在不同高度的基球场间隙和杆平面间隙的情况下，使用不同的高度校正方法计算并分析了4,000米及以下的转换器站的阀门厅所需的最小气隙距离。间隙因素。研究结果可用于高海拔地区阀门厅和DC领域的设计。另一方面，它为高海拔地区的长气隙的高度校正提供了基本数据。

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