Digital Switchgear: The Next Phase in the Evolution of Safety by Design

Karandikar, Harshavardhan; Neighbours, Terry; Pate, Ron

doi:10.1109/mias.2020.3024491

Cited by 5 publications

(1 citation statement)

References 8 publications

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“…The research results of the China Electric Power Research Institute show that the main component of transformer faults is the collector on its secondary side, which manifests in the form of abnormal spikes, waveform distortion, DC drift, periodic variations and signal interruption [6]. With the large-scale and intelligent development of offshore wind farms, the application of intelligent control technology puts forward higher requirements for the digitalisation and intellectualisation of switchgear, which makes intelligent high-voltage switchgear more sensitive to electromagnetic disturbances [7,8]. According to the CIGRE research, 29% of serious switching failures are caused by electrical control systems and sensors, and 64.44% of the switching equipment performance changes are caused by the performance degradation of control and sensing systems, indicating that the reliability of the existing vacuum circuit breaker secondary equipment still needs to be improved [9].…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic disturbance characteristic of typical high voltage switchgear interruption process in offshore wind farm based on integrated conduction model

et al. 2023

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In an offshore wind farm, a high‐voltage switchgear interruption in an offshore substation creates a high‐frequency, high‐amplitude overvoltage that can cause severe electromagnetic interference problems in the intelligent electronic device. To address this issue, mathematical models, vector fitting and finite element method were used to build an integrated electromagnetic disturbance conduction model, whose accuracy was verified by large current interruption tests. Through the simulation of a typical offshore wind farm's single‐phase grounding fault interruption process, the electromagnetic disturbance characteristics and the impact of the ground position are obtained. The results show that during the fault interruption process of phase B grounded, the dominant frequency of disturbance voltage can reach 4.34 MHz, and the amplitude can reach 1.12 kV. The ground grid has a large impact on the interference voltage, which can reach a maximum value of 2.28 kV under specific conditions. The disturbance voltage in the fault process mainly comes through the current transformer, while during the interruption process, it mainly comes through the ground grid. The authors provide a method to establish the integrated electromagnetic disturbance simulation model, which can improve the accuracy of the electromagnetic disturbance conduction process simulation of intelligent components.

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Section: Introductionmentioning

confidence: 99%