New Adaptive Reclosing Technique in Unbalanced Distribution System

Seo, Hun-Chul

doi:10.3390/en10071004

Cited by 8 publications

(6 citation statements)

References 25 publications

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“…is the shortened form of Load Rate and the same below. Then, three phase unbalanced loads may also exist in weak power grid structure area and may occur in temporary operation with fault, or during the process of power distribution networks reconfiguration in certain areas [26,27]. The acoustic radiation characteristics analysis of power transformers in these extreme situations are hence essential for operators to release timely information, and then to reduce complaints from neighboring residents.…”

Section: Analysis and Discussionmentioning

confidence: 99%

Power Transformer Spatial Acoustic Radiation Characteristics Analysis under Multiple Operating Conditions

Ying

Wang

et al. 2018

Energies

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Abstract:Spatial acoustic radiation characteristics analysis is the precondition of reducing the noise influence of outdoor power transformer while multi-physical field coupling method can be applied to quantify and reveal these acoustic characteristics of a running power transformer. In this study, based on the theoretical analysis about noise generation and dissemination process, an acoustic radiation model about oil-immersed power transformer was established and verified with field test data in time and frequency domain. Then, far-field analysis and directivity analysis were accomplished to characterize acoustic field of power transformer under multiple operating conditions. Finally, the acoustic radiation influence on potential surrounding buildings were analyzed and discussed. The visual results and conclusion provide acoustic guide for the optimal planning and design about both power substation and ambient buildings.

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Section: Analysis and Discussionmentioning

confidence: 99%

Power Transformer Spatial Acoustic Radiation Characteristics Analysis under Multiple Operating Conditions

Ying

Wang

et al. 2018

Energies

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“…It is believed that a few hours training would be sufficient to educate a new utility employee. 11 If earth fault indicator is installed at the end of the cable lines. 12 In exceptional cases-long overhead line and short cable line.…”

Section: Methods Of Fault Localizationmentioning

confidence: 99%

“…The proposed method is developed for 3 phase 3 wire system with 1 neutral point grounding or isolated systems. Four wires network, multi-point grounded network and others require different methods of fault location and blocking of AR [11]. The presented criteria are not valid in multi-point grounded system since additional earthing points would create parallel paths for earth fault current flow.…”

Section: Introductionmentioning

confidence: 99%

Detection and Location of Earth Fault in MV Feeders Using Screen Earthing Current Measurements

Łowczowski

Lorenc

Zawodniak³

et al. 2020

Energies

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The paper analyzes the utilization of cable screen currents for earth fault identification and location. Attention is paid on cable and mixed feeders—cable and overhead lines. The principle of operation is based on utilization of 3 criterion values: Ratio of cable screen earthing current and zero sequence cable core current—RF110/15, phase shift between cable screen earthing current and zero sequence cable core current—α and cable screen admittance defined as a ratio of cable screen earthing current and zero sequence voltage—Y0cs. Earth fault location is possible thanks to discovered relation between RF110/15 and α, whereas Y0cs allows for reliable detection of earth faults. Detection and identification are very important because it allows to increase the reliability of supply—reduce downtime and number of consumers affected by the fault. The article presents a phase to ground fault current flow for different power system configurations. At the end solution, which improves location capabilities is proposed. The solution is analyzed in PSCAD software and verified by network experiment.

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“…The electrostatic induction phenomenon between the three-phase and neutral lines in an unbalanced distribution system is utilized to detect the instant of fault clearance in [24]. However, the impact of BESS is not investigated in [24]. During the fault period, BESS is highly stressed which adversely affects its lifespan.…”

Section: Introductionmentioning

confidence: 99%

Uninterrupted power supply to BESS based microgrid system using adaptive reclosing approach

Ghore

Das

Biswal

2020

IET Generation Trans & Dist

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As more than 80% of faults on overhead lines are temporary (transient) in nature which is caused due to lightning strikes, momentary bird or tree limb contact, wind bringing conductors in contact, etc. These type of faults gets cleared by itself in a short duration. But the use of a conventional reclosing scheme results in an outage time which is much larger than the actual fault duration. This is due to the use of fixed dead times in conventional reclosing schemes. This unnecessary outage results in increased consumption of stored energy of energy storage system causing considerable losses. This paper proposes an empirical mode decomposition based adaptive reclosing technique which can sense the exact instant of fault clearance and modify the prefixed dead time to an adaptive value. Within half cycle time period after fault clearance reclosing command can be issued for the breaker. The performance of the proposed algorithm is verified in a modified IEEE 13 bus distribution network model considering a battery energy storage system and hybrid distributed generators. The simulation and modelling of the various fault cases in the microgrid structure are done using EMTDC/PSCAD software.

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New Adaptive Reclosing Technique in Unbalanced Distribution System

Cited by 8 publications

References 25 publications

Power Transformer Spatial Acoustic Radiation Characteristics Analysis under Multiple Operating Conditions

Power Transformer Spatial Acoustic Radiation Characteristics Analysis under Multiple Operating Conditions

Detection and Location of Earth Fault in MV Feeders Using Screen Earthing Current Measurements

Uninterrupted power supply to BESS based microgrid system using adaptive reclosing approach

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