Reignition overvoltages induced by vacuum circuit breakers and its suppression in offshore wind farms

Guo, Yaxun; Jiang, Xiujuan; Chen, Yun; Zheng, Ming; Liu, Gang; Li, Xiaohua; Tang, Wenhu

doi:10.1016/j.ijepes.2020.106227

Cited by 19 publications

(3 citation statements)

References 24 publications

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“…Vacuum circuit breakers (VCBs) are widely used in switching wind farms because of their advantages of having lower maintenance requirements and longer operation life [11], [12], [13], [15], [17], [18], [24], [25], [26], [27], [28], [29], [32]. The VCB was modeled on ATP as a switch which was controlled using the MODELS component.…”

Section: Modeling Of the System A Modeling Of The Vacuum Circuit Breakermentioning

confidence: 99%

Comparative Assessment of Switching Overvoltages Suppression Measures in Different Wind Farm Topologies

2023

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Mitigation techniques associating vacuum circuit breakers (VCB) were proven highly effective in reducing switching overvoltages (SOV) in wind farms. However, the structure of wind farms in modern-day power systems is not fixed to a certain topology. In this paper, the impact of changing the topology of the wind farm upon the capability of mitigation techniques in reducing SOV was investigated which is considerd the first contribution of the paper. Four wind farm topologies were selected; radial, singlesided ring, double-sided ring and star topology. Four mitigation techniques were used for each topology: the pre-insertion resistor (PIR), the RC-snubber circuit, R-L smart choke and the surge capacitor. The simulations showed the failure of the VCB to open without any suppression measure. The addition of a surge capacitor didn't improve, while the remaining suppression measures were successful. It was noticed that PIR and R-L were optimal in radial and star topologies, which successfully reduced the SOV by an average of 52%. At the same time, R-C snubber was optimal for ring topologies that reduced SOV by an average of 70%. The presented results are not universally applicable to all wind farms, but they highlight the second contribution of the paper which is proving throught the presented investigation the dependence of the performance of SOV suppression measures upon the topology of the wind farm. The third contribution is presented in the conclusion that recommends for the selection of suppression measures in windfarms; simulations should be done to include the effect of the topology of the wind farm.

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Section: Modeling Of the System A Modeling Of The Vacuum Circuit Breakermentioning

confidence: 99%

Comparative Assessment of Switching Overvoltages Suppression Measures in Different Wind Farm Topologies

2023

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“…Vacuum circuit breakers are widely used in the 35 kV collection systems of offshore wind farms because of their small size, large breaking capacity and being environment friendly [1]. However, wind power has the characteristics of intermittency and volatility, making it is easy to cause frequent switching of electrical equipment, such as cables, reactors and fans [2].…”

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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“…Meanwhile, several methods have been proposed to suppress the switching overvoltage caused by the VCB, such as surge arrester [16][17][18], shunt capacitor [19], and resistorcapacitor (RC) snubber [20,21]. For instance, various types of surge arresters are available, such as star type and trident type with three or four gaps.…”

Section: Introductionmentioning

confidence: 99%

Investigation on overvoltage caused by vacuum circuit breaker switching off shunt reactor in offshore wind farms

et al. 2022

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The multiple reignitions of vacuum circuit braker (VCB) while switching off the shunt reactor in an offshore wind farm (OWF) would produce a high overvoltage. The post-arc process of ion movement in the vacuum interrupter is analysed. Considering the sheath growth and ion concentration variation, the expression for dielectric recovery strength inside the VCB interrupter is derived. A novel VCB model is implemented in the environment of electromagnetic transient programme based on the new reignition criterion. Then, the switching overvoltage is computed and analysed in detail. For the OWF with high rising rate of transient recovery voltage, the sheath growth must be considered in the VCB model; otherwise, the overvoltage may be underestimated. Using resistorcapacitor (RC) snubber, a new installation scheme is proposed to suppress the overvoltage in the OWF. The results indicate that the proposed scheme can not only reduce the peak and steepness of overvoltage but also damp the high-frequency oscillation. It would not affect the steady-state operation of OWF. Besides, the capacitor of RC snubber normally does not bear the electric stress, and its life expectancy would be greatly enhanced.

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Reignition overvoltages induced by vacuum circuit breakers and its suppression in offshore wind farms

Cited by 19 publications

References 24 publications

Comparative Assessment of Switching Overvoltages Suppression Measures in Different Wind Farm Topologies

Comparative Assessment of Switching Overvoltages Suppression Measures in Different Wind Farm Topologies

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

Investigation on overvoltage caused by vacuum circuit breaker switching off shunt reactor in offshore wind farms

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