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Electromagnetic disturbances in gas-insulated substations and VFT calculations

机译:气体绝缘变电站中的电磁干扰和VFT计算

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This paper is focused on the oscillating frequencies of very-fast transients (VFTs) generated by disconnector and circuit breaker operations in gas-insulated substations (GISs) related to electromagnetic disturbances (EMDs). Test results of the VFT amplitudes and oscillating frequencies are summarized, and the measured results have shown that there is no significant difference of the frequencies in the high-voltage main circuits and the low-voltage control circuits in the GISs. Modeling of GIS elements for VFT simulations by EMT-type software are explained, and simulation examples are demonstrated in comparison with test results. Also, FDTD (finite-difference time-domain) computations are performed, and the calculated results are compared with EMTP simulation results. If proper modeling is adopted, EMTP and FDTD results show a reasonable agreement. (C) 2018 Elsevier B.V. All rights reserved.
机译:本文的重点是与电磁干扰(EMD)相关的气体绝缘变电站(GIS)中的隔离开关和断路器操作所产生的非常快速的瞬态(VFT)的振荡频率。总结了VFT幅度和振荡频率的测试结果,测量结果表明,GIS中高压主电路和低压控制电路的频率没有显着差异。解释了通过EMT型软件对用于VFT仿真的GIS元素进行建模,并与测试结果进行了比较,演示了仿真示例。此外,执行FDTD(时域有限差分)计算,并将计算结果与EMTP仿真结果进行比较。如果采用正确的建模,则EMTP和FDTD结果表明合理的一致性。 (C)2018 Elsevier B.V.保留所有权利。

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