Statistical analysis of switching overvoltages in UHV transmission lines with a controlled switching

Zhang, Fan; Duan, Xiongying; Liao, Minfu; Zou, Jiyan; Liu, Zhiheng

doi:10.1049/iet-gtd.2019.1072

Cited by 13 publications

(11 citation statements)

References 18 publications

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“…Figure 13 shows the relationship between d 50 and σ pre of each VI in Test 1 and Test 2, where the error bar at each data point ( d 50 ) shows the corresponding σ pre . Reduction of the d pre and the σ pre of VCBs will increase the accuracy of controlled switching in limiting inrush currents [11]. The TMF double‐break VCB has more advantages than the AMF double‐break VCB in the application of controlled switching of capacitor banks.…”

Section: Discussionmentioning

confidence: 99%

“…The diameter of the columnar arc is according to the prestrike arc image as shown in Figure 9. The con- 11 The Lorentz force density distribution under axial magnetic flux at the mid-gap when the inrush current is at peak FIGURE 12 The transverse magnetic flux density distribution and the Lorentz force at the mid-gap when the inrush current is at peak surrounding area and is weak near the centre. The maximum magnetic flux density is about 5.72 mT.…”

Section: The Effects Of Amfs and Tmfs On Prestrike Arc Behavioursmentioning

confidence: 99%

“…The prestrike gaps and the scatter in prestrike gaps of VCBs have much influence on the accuracy of controlled switching. Reduction of the prestrike gaps and the scatter in prestrike gaps of VCBs will increase the performance of controlled switching in limiting inrush currents [11].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Capacitive making of double‐break vacuum circuit breaker: Transverse magnetic field contacts are superior to axial magnetic field contacts

Geng

Chen

Yao

et al. 2022

IET Generation Trans & Dist

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Previous studies mainly focused on the behaviours of single‐break vacuum circuit breakers (VCBs) in switching capacitor banks. The prestrike characteristics of double‐break VCBs subjected to axial magnetic fields (AMFs) and transverse magnetic fields (TMFs) in capacitive making operations, to find a proper structure of double‐break VCBs for capacitive switching are experimentally investigated here. Special attention is given to the prestrike gap, inrush current interruption, prestrike voltage, prestrike electric field strength and erosion on contact surfaces of double‐break VCBs. The results show that the 50% prestrike gap d50 and the scatter in prestrike gaps are significantly reduced by nearly 50% by the TMF double‐break VCB compared with the AMF double‐break VCB. The 50% prestrike arcing time ta50 of the TMF double‐break VCB can be reduced by 37.0% compared with the AMF double‐break VCB. The voltage distribution ratio between two vacuum interrupters (VIs) is more balanced in the TMF double‐break VCB (6:4) than in the AMF double‐break VCB (7:3) when prestrike occurs. The TMF double‐break VCB can reduce the erosion caused by inrush currents on contact surfaces compared with the AMF double‐break VCB. In switching capacitor banks, the TMF double‐break VCB is superior to the AMF double‐break VCB.

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Section: Discussionmentioning

confidence: 99%

Section: The Effects Of Amfs and Tmfs On Prestrike Arc Behavioursmentioning

confidence: 99%

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Capacitive making of double‐break vacuum circuit breaker: Transverse magnetic field contacts are superior to axial magnetic field contacts

Geng

Chen

Yao

et al. 2022

IET Generation Trans & Dist

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“…But overcurrents are not the only unwanted phenomenon, as the need of protecting the equipment against overvoltages is equally important [33,34]. Overvoltage instances happen when the voltage in the circuit, or part of the circuit, increases above its designed limit causing potential damage in the equipment of the grid.…”

Section: General Topic and Overviewmentioning

confidence: 99%

Advanced Hierarchical Control and Stability Analysis of DC Microgrids

Braitor

2022

Springer Theses

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source is rigorously proven using ultimate boundedness theory. Asymptotic stability to the desired equilibrium for the closed-loop system is analytically guaranteed, and detailed conditions are derived to guide the control design. v In order to validate the effectiveness of the different control methodologies developed in this thesis, both simulation and experimental testing are performed for each one of the methods, and are also compared with the conventional approaches to highlight their superiority. vi xi 5.4 Simulation results of the system states of two parallel operated DC/DC boost converters under the proposed controller . . . . . . . . . . . . . 5.5 Simulation results of the controller states of two parallel operated DC/DC boost converters under the proposed controller . . . . . . . . 5.6 DC microgrid configuration with n paralleled unidirectional DC/DC boost converters feeding a common generic load.

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“…Apart from the theoretical analysis, the need of protecting the power units from overvoltages via the control design has emerged [13], [14], since DC capacitors are commonly used at the output of each unit's converter, which introduce a maximum limit. Overvoltage instances occur when the voltage in a circuit, or part of the circuit, increases above its designed limit, causing potential damages and faults in the converter components or the grid.…”

Section: Introductionmentioning

confidence: 99%

Novel droop control design for overvoltage protection of DC microgrids with a constant power load

Braitor

Konstantopoulos

Kadirkamanathan

2020

2020 28th Mediterranean Conference on Control and Automation (MED)

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Statistical analysis of switching overvoltages in UHV transmission lines with a controlled switching

Cited by 13 publications

References 18 publications

Capacitive making of double‐break vacuum circuit breaker: Transverse magnetic field contacts are superior to axial magnetic field contacts

Capacitive making of double‐break vacuum circuit breaker: Transverse magnetic field contacts are superior to axial magnetic field contacts

Advanced Hierarchical Control and Stability Analysis of DC Microgrids

Novel droop control design for overvoltage protection of DC microgrids with a constant power load

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