Faulted terminal open circuit voltage controller for arc suppression in distribution network

Chen, Kunyi; Zhang, Wenhai; Xiao, Xianyong

doi:10.1049/iet-gtd.2019.1643

Cited by 11 publications

(5 citation statements)

References 30 publications

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“…When a singlephase grounding fault is detected, measure and record the voltage of the fault phase at the bus, the current and the zero-sequence current of the grounded phase at the beginning of the fault line before and after the active inverter is put into operation. Subsequently, calculate l according to (22) and substitute it into (13) to obtain ref U & , and then adjust the operating state of the inverter to maintain the neutral point voltage near the reference value to complete arc suppression.…”

Section: Control Flow Of the Arc Suppression Methodsmentioning

confidence: 99%

“…However, this method still has the possibility of increasing the fault current after being put into the TAS. In [22], the fault distance is calculated step by step according to the set step length, and then the optimal neutral point voltage target value can be determined. However, this method has the defect of requiring a long time for arc suppression.…”

Section: Introductionmentioning

confidence: 99%

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Novel arc suppression method for single-phase grounding fault considering line voltage drop

Ding

Zou

Zhou

et al. 2022

Preprint

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The existing active voltage arc suppression methods don’t consider the influence of line voltage drop, which leads to the existence of large fault residual current at the fault point for low resistance grounding fault occurring in the distribution network and affects the reliable extinguishing of the fault arc. In this paper, an active inverter is used to inject a compensating current to the neutral point of the system before and after the fault, and the distance between the fault point and the bus is calculated, then the reference value of the neutral point voltage which controls the fault point voltage to zero can be obtained. A double closed-loop control strategy of current inner loop and voltage outer loop is used to track the voltage reference value. The simulation results show that the proposed method is independent of the exact zero- sequence admittance value, and not only has a good arc suppression effect under different fault conditions, but also can effectively suppress the harmonic components of the fault current.

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Section: Control Flow Of the Arc Suppression Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Novel arc suppression method for single-phase grounding fault considering line voltage drop

Ding

Zou

Zhou

et al. 2022

Preprint

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“…However, the traditional grounding mode of the Peterson coil can only compensate for the inductive component but can do nothing to the capacitive component. In recent years, active flexible grounding has been widely studied by scholars because of its advantages of flexible regulation of zero-sequence voltage [3][4].…”

Section: Introductionmentioning

confidence: 99%

A Novel Fault Current Full Compensation Method in Active Flexible Grounding Distribution Networks

Wang

et al. 2023

J. Phys.: Conf. Ser.

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As the power equipment represented by the inverter is gradually increasing in the power systems, the residual capacitive component of the grounding fault current cannot be ignored. To solve the problem of insufficient compensation for capacitive components in the traditional arc suppression coil grounding mode, a grounding fault current full compensation method based on the active flexible grounding mode was proposed. First, the principle of full compensation in the active flexible grounding mode was analyzed to provide a reference for the injected current of voltage arc suppression full compensation. Then, the inverter control system was designed, and a closed-loop control method was proposed, both of which can ensure the stable target current of the system. Finally, the simulation results compare the fault current compensation difference between the two grounding modes, and the practicability of the proposed compensation method was verified.

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“…Power electronics based active ac-suppression methods are proposed in [17][18][19][20]. In [17]- [19], inverters based current sources are connected to the neutral point. Therefore, all the active, reactive and harmonic components of the ground fault current can be dynamically compensated.…”

mentioning

confidence: 99%

“…Therefore, the arc current can be accurately compensated with reduced power electronic usage. All these active acsuppression options [17][18][19][20] connect to the neutral point of the feeder side of the transformer and dedicated dc sources are needed. Note that an equivalent neutral point could be created by a zigzag transformer connected to the 3-phase bus bar, if the transformer feeder side is delta-connected.…”

mentioning

confidence: 99%

Two-Phase Current Injection Method for Single Line-to-Ground Fault Arc-Suppression With Revised STATCOM

Chen

Zhou

et al. 2020

IEEE Access

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To suppress the arc current in the single line-to-ground (SLG) fault in neutral isolated distribution network, a two-phase current injection method is proposed for the revised static synchronous compensator (STATCOM), as an extra function during the SLG fault. Therefore, the traditional roles of the dedicated passive coil or power electronic based arc-suppression devices can be taken by this multipurpose STATCOM. This paper first introduces the principles and the models of the arc-suppression current injection during SLG fault. Then, different options of arc-suppression current injection by the revised STATCOM are analyzed in terms of stabilizing the floating dc capacitor voltages of the cascaded H-bridges (CHB) converter. It is discovered that the two-phase current injection is the only viable option to maintain the floating dc capacitors voltages. Then, the arc-suppression current controller and the dc capacitors voltages controller are proposed, and the design process of the control parameters adapting to the varying transitional (grounding) resistances computed online are also introduced. The proposed methods are first validated by simulations. Then, an MVA-rating CHB converter prototype is constructed, and 10kV feeder SLG fault and arc-suppression experiments are performed to demonstrate the effectiveness of the proposed method. INDEX TERMS Single line-to-ground fault, arc suppression, cascaded H-bridge (CHB) converter, floating dc capacitor voltage control. NOMENCLATURE

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Faulted terminal open circuit voltage controller for arc suppression in distribution network

Cited by 11 publications

References 30 publications

Novel arc suppression method for single-phase grounding fault considering line voltage drop

Novel arc suppression method for single-phase grounding fault considering line voltage drop

A Novel Fault Current Full Compensation Method in Active Flexible Grounding Distribution Networks

Two-Phase Current Injection Method for Single Line-to-Ground Fault Arc-Suppression With Revised STATCOM

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