特高压气体绝缘开关设备瞬态外壳电压的全波仿真

doi:11.11985/2016.02.002

摘要/Abstract

摘要：

随着特高压电网和智能变电站的发展,气体绝缘开关设备（Gas Insulated Switchgear,GIS）中隔离开关操作产生的高幅值、宽频带的瞬态外壳电压（Transient Enclosure Voltage,TEV）对汇控柜中智能组件的潜在威胁越来越大。由于TEV频率较高、模型复杂,准确地建立其宽频等效电路非常困难,而采用基于时域有限积分的全波仿真可以避开电路建模的难点,直接建立实物模型,在源和边界条件给定后将模型网格剖分进行电磁场数值计算,完全适用于TEV的仿真计算。根据某1 100kV GIS单相试验回路建立其全波仿真模型,计算获得不同位置TEV单次击穿时域波形,与实际测量结果在幅值和其他波形特征参数方面一致性较好,说明TEV全波仿真的正确性。

关键词: 气体绝缘开关设备, 瞬态外壳电压, 时域有限积分法, 全波仿真

Abstract:

With the development of ultra-high voltage power grid, the transient enclosure voltage (TEV) with high amplitude and broad band resulted from the gas insulated switchgear (GIS) switching operation may cause seri-ous interference on the normal operation of the intelligent electronic device in control cabinets. Because the frequency of the TEV is quite high and the modal of TEV is very complicated, it is difficult to establish its broadband equivalent circuit accurately. However, the full-wave simulation by using the method of finite integral time domain can avoid the difficulties of establishing circuit model. In this method, the physical model of TEV is established. Cut the model into the grid for numerical calculation of electromagnetic fields when the source and the boundary conditions have been given. A full-wave simulation model of a practical 1 100kV GIS single-phase tested loop is established. For this model, full-wave simulation of electromagnetic transients is conducted and single striking time-domain waveforms of TEV at different positions are acquired. It is in good agreement with the ac-tual measurement results in the aspect of waveform characteristic parameters, show the correctness of the full-wave simulation.

Key words: Gas insulated switchgear, transient enclosure voltage, finite integral time domain, full-wave simulation

中图分类号:

TM154.4

李顺杰,焦重庆,张荐. 特高压气体绝缘开关设备瞬态外壳电压的全波仿真[J]. 电气工程学报, 2016, 11(2): 10-15.

Li Shunjie,Jiao Chongqing,Zhang Jian. Full-Wave Simulation of Transient Enclosure Voltage Due to Ultra High Voltage Gas Insulated Substation Switching Operations[J]. Journal of Electrical Engineering, 2016, 11(2): 10-15.

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TEV 观测点	幅值 /kV	幅值上升时间/ns	脉冲持续时间/μs	主要频率 /MHz
1	3.2	12	3	7.8、11.3、15.8
2	14.4	20	3	7.8、11.3、15.8
1（实测）	3.2	10	3	5.8、10.8、21.3
2（实测）	8.1	11	3	5.9、10.8、19.7