Impact Factor Identification for Switching Overvoltage in an Offshore Wind Farm by Analyzing Multiple Ignition Transients

Zhou, Jianqiao; Xin, Yanli; Tang, Wenhu; Liu, Gang

doi:10.1109/access.2019.2916952

Cited by 17 publications

(6 citation statements)

References 21 publications

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“…For each topology, different mitigation techniques were applied individually one by one to assess their capability in reducing the switching overvoltages. The mitigation techniques studied include four schemes that showed their effectiveness in literature namely; RC snubber circuit 8 , 9 , 11 , Pre-Insertion Resistor (PIR) 12 and surge capacitor 33 . The value of the parameters of each scheme (R and/or C) were set to reach maximum reduction in overvoltages based on defined ranges from literature 34 .…”

Section: Simulation Resultsmentioning

confidence: 99%

Evaluation of the efficacy of transient overvoltages suppression measures in different wind farm topologies using SF6 circuit breaker

Eliyan,

Wadie

2023

Sci Rep

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Various overvoltage mitigation schemes were used in literature in suppression of switching overvoltages in wind farms. However, the evaluation of how the effectiveness of these mitigation techniques would vary with the change of the wind farm topology is still un-explored territory. The main aim of this paper is to study the effectiveness of four mitigation schemes while using SF6 circuit breaker namely; R–L smart choke, R–C snubber circuit, surge capacitor and pre-insertion resistor (PIR) were studied in four different wind farm topologies; radial, single-sided ring, double-sided ring and star topologies. The topologies were based on a real wind farm located in Zaafrana, Egypt. The results showed that R–L choke to be the most effective scheme for all topologies followed by PIR, R–C snubber and surge capacitor schemes respectively. Their percentage of reduction of overvoltage ranged from 62 to 84% for R–L choke, 33–67% for PIR, 8–25% for R–C snubber circuits and 4–15% for surge capacitors. Also, it was shown that the change of the wind farm topology didn’t affect the order of effectiveness of the mitigation schemes such that R–L remained the most effective and surge capacitor the least effective for all topologies.

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Section: Simulation Resultsmentioning

confidence: 99%

Evaluation of the efficacy of transient overvoltages suppression measures in different wind farm topologies using SF6 circuit breaker

Eliyan,

Wadie

2023

Sci Rep

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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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“…Also, the HF current may couple to the other phases, producing current zeros. Thus virtual chopping occurs, causing overvoltage in other phases [10,21]. In the process of multiple reignitions, the interval between the two reignitions is extremely short.…”

Section: Vcb Modelmentioning

confidence: 99%

“…In 2004, at Horns Rev, the largest OWF in Denmark at that time, almost all the tower terminal transformers suffered insulation fault accidents [9]. In [10], the authors reported an accident of transformer insulation damage occurred by switching off a vacuum circuit breaker (VCB) after connecting with the shunt reactor in Wailuo OWF. Studies have shown that the high-frequency (HF) overvoltage generated by the frequent switching on and off for VCBs was the main factor causing insulation fault of the transformers [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Study on Transient Overvoltage of Offshore Wind Farm Considering Different Electrical Characteristics of Vacuum Circuit Breaker

Zhou

Guo

Jiang

et al. 2019

JMSE

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For the study of transient overvoltage (TOV) in an offshore wind farm (OWF) collector system caused by switching off vacuum circuit breakers (VCBs), a simplified experimental platform of OWF medium-voltage (MV) cable collector system was established in this paper to conduct switching operation tests of VCB and obtain the characteristic parameters for VCB, especially dielectric strength parameters; also, the effectiveness of the VCB reignition model was verified. Then, PSCAD/EMTDC was used to construct the MV collector system of the OWF, and the effects of normal switching and fault switching on TOV amplitude, steepness, and the total number of reignition of the VCB were studied, respectively, with the experimental parameters and traditional parameters of dielectric strength of the VCB. The simulation results show that when the VCB is at the tower bottom, the overvoltage amplitude generated by the normal switching is the largest, which is 1.83 p.u., and the overvoltage steepness of the fault switching is the largest, up to 142 kV/μs. The overvoltage amplitude and steepness caused by switching off VCB at the tower bottom faultily with traditional parameters are about 2 and 1.5 times of the experimental parameters under the same operating condition.

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Impact Factor Identification for Switching Overvoltage in an Offshore Wind Farm by Analyzing Multiple Ignition Transients

Cited by 17 publications

References 21 publications

Evaluation of the efficacy of transient overvoltages suppression measures in different wind farm topologies using SF6 circuit breaker

Evaluation of the efficacy of transient overvoltages suppression measures in different wind farm topologies using SF6 circuit breaker

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

Study on Transient Overvoltage of Offshore Wind Farm Considering Different Electrical Characteristics of Vacuum Circuit Breaker

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