Results 41 to 50 of about 370 (172)
The Journal of Engineering, Volume 2019, Issue 16, Page 2921-2925, March 2019., 2019 An accurate computational model of transformer winding for potential distribution analysis under impulse voltage is very important for the design of transformer inter‐turn insulation, especially for large capacity transformers such as ultrahigh‐voltage DC (UHVDC) converter transformer.
Shuang He +7 more
wiley +1 more source
A novel GIS breakdown location method based on natural frequency of transient voltage
High Voltage, Volume 10, Issue 4, Page 856-875, August 2025.Abstract During on‐site withstand voltage tests of gas‐insulated switchgears (GIS), once a breakdown occurs, it is hard to locate the breakdown position due to the intricate branch structures and minimal breakdown energy. The existing methods may require the placement of a large number of sensors with unsatisfactory accuracy, which adversely affects ...
Qiang Sun +9 more
wiley +1 more source
The Journal of Engineering, Volume 2019, Issue 16, Page 1144-1148, March 2019., 2019 With the continuous expansion of power grid capacity and growth of voltage levels, the transient ground potential rise (GPR) caused by the switchgear operation has become great threaten to the safety of the grid. In the startup operation of 500 kV part of Taizhou 1000 kV ultra‐high voltage (UHV) substation, the electromagnetic lock installed in the ...
Fubin Pang +3 more
wiley +1 more source
New mitigation methods for transient overvoltages in gas insulated substations [PDF]
, 2012 During switching of disconnectors (DS) in GIS a varying number of pre-strikes and re-strikes occur. Due to the very short duration of the voltage collapse, traveling surges are generated in the busbar duct.
Burow, Simon +3 more
core +1 more source
High Voltage, Volume 9, Issue 4, Page 773-785, August 2024.Abstract In the past three years, a number of oil‐immersed ultra‐high‐voltage shunt reactors have experienced discharge defects when being put into operation, resulting in an overload of acetylene. However, detecting and identifying these discharge defects caused by switching impulse voltage is challenging under steady‐state conditions.
Simeng Li +5 more
wiley +1 more source
The Journal of Engineering, Volume 2019, Issue 16, Page 3337-3340, March 2019., 2019 The Rogowski coil current transformer is widely used in intelligent substations for its rapid response, wide bandwidth measurement, and non‐magnetic saturation. In most cases, it works with a digital integrator to restore the differential signal output by the coil.
Fubin Pang +3 more
wiley +1 more source
IET Generation, Transmission &Distribution, Volume 18, Issue 8, Page 1611-1623, April 2024.This paper proposes a peak time of voltage travelling wave‐based protection scheme for DN with distributed generators using FRs as line boundary. Numerical simulation and experimental results verify that the proposed method can quickly and sensitively distinguish internal and external faults, and has high resistance to transition resistance.
Zhongxue Chang +3 more
wiley +1 more source
Modelling and validation of metal oxide surge arrester for very fast transients
High Voltage, Volume 3, Issue 2, Page 147-153, June 2018., 2018 Metal oxide surge arrester models that are currently on rounds suffer from certain deficiencies and as a consequence, they are not in position to portray accurately the arrester residual voltages. This drawback is mainly attributed to their inherent features.
Kannadasan Raju, Valsalal Prasad
wiley +1 more source
High Voltage, Volume 9, Issue 1, Page 150-162, February 2024.Abstract As voltage measuring devices are widely used in the high voltage power system with a primary‐secondary‐fusion structure, electronic voltage transformers are directly connected to the primary conductor and would face much more serious electromagnetic environments than general secondary equipment.
Houda Zhu +5 more
wiley +1 more source
Gaoya dianqi, 2020 GIS隔离开关在操作过程中会产生VFTO,对设备的安全稳定运行构成威胁,因此,研究隔离开关操作过程中VFTO的抑制措施具有重要意义。文中首先开展了隔离开关操作顺序对VFTO影响的理论分析,以某抽水蓄能500kVGIS由于VFTO引起的故障案例,通过仿真计算分析了优化操作顺序降低VFTO的效果。最后,对该措施的进一步推广应用进行了展望。
刘凯 +6 more
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