超高海拔换流站交流侧空气间隙取值及布置研究

Study on Air Clearance Value and Arrangement of AC Side in an Ultrahigh Altitude Converter Station

相较于常规换流站,超高海拔换流站中的空气间隙取值对整体布置尺寸的影响程度偏大很多。文章根据以往试验和工程经验研究提出某超高海拔换流站500 kV交流侧关键位置不同形状间隙系数的对应数值,按规程规范计算相应的过电压水平和空气间隙。通过研究选取不同关键位置合理的空气间隙差异化数值,给出该换流站500 kV交流滤波器配电装置布置。通过合理的差异化取值,不仅优化了布置尺寸,节省了滤波器区域整体占地面积,而且降低了工程造价。

Compared with the conventional converter station,the value of air clearance in the ultrahigh altitude converter station has a much greater impact on the overall layout size.Based on previous tests and engineering experience,the corresponding values of different shape clearance factors at the key position of 500 kV AC(alternating current)side of a high altitude converter station are proposed,and the corresponding overvoltage level and air clearance are calculated according to the regulations.The layout of 500 kV AC filter distribution unit in the converter station is proposed according to the studying and selecting reasonable differential values of air clearance at different key positions.Through adopting reasonable differentiation values,the layout size is optimized.As a result,the overall site area of filter field is saved and the project cost is reduced.