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发明公开
CN101881813A 模拟GIS变电站中产生特快速瞬态过电压的方法及试验回路 有权

模拟GIS变电站中产生特快速瞬态过电压的方法及试验回路
摘要：
本发明提供一种通过试验回路模拟气体绝缘金属封闭开关设备GIS变电站中产生特快速瞬态过电压的方法及试验回路，所述试验回路包括：第一隔离开关设备、第二隔离开关设备、第一隔离管套、第二隔离管套；第一隔离开关设备的一端通过管道与第二隔离开关设备的一端连接，第一隔离开关设备的另一端通过管道与第一隔离管套一端连接，第二隔离开关设备的另一端通过管道与第二隔离管套的一端连接，还包括：分支母线，分支母线的一端连接在第一隔离开关设备和第一隔离管套之间的管道上，另一端悬空，通过改变分支母线的长度来模拟GIS变电站中不同的GIS接线方式下隔离开关断口和GIS管道上出现的VFTO波形。
摘要（英）：

The invention provides a method for simulating a gas insulated switchgear (GIS) transformer substation to produce very fast transient overvoltage (VFTO) by a test circuit and the test circuit. The test circuit comprises a first isolating switch gear, a second isolating switch gear, a first isolating pipe sleeve, a second isolating pipe sleeve and a branch bus, wherein one end of the first isolating switch gear is connected with one end of the second isolating switch gear via a pipeline; and the other end of the first isolating switch gear is connected with one end of th first isolating pipe sleeve via a pipeline; the other end of the second isolating switch gear is connected with one end of the second isolating pipe sleeve; one end of the branch bus is connected with the pipeline between the first isolating switch gear and the first isolating pipe sleeve and the other end thereof is overhung; and VTTO waveforms occurring on isolating switch fractures and GIS pipelines in the GIS transformer substation are simulated by changing the length of the branch bus under different GIS connection modes.

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