Control Strategy for Arc-Suppression-Coil-Grounded Star-Connected Power Electronic Transformers

Ouyang, Shaodi; Liu, Jinjun; Yang, Yue; Chen, Xingxing; Song, Shuguang; Wu, Hongda

doi:10.1109/tpel.2018.2866871

Cited by 40 publications

(13 citation statements)

References 19 publications

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“…With the consideration of the leakage inductances in both transformers T1 and T2, the distribution network can be simplified to a voltage source in series with the leakage inductances. We assume SLG fault happens in phase C, then the circuit of the whole system of Fig.1 can be simplified to Fig.4, where Z∑ denotes the impedance of the distribution network and is shown in (6), where YX is the phase-toground admittance, i.e., YX=jω0CX+1/RX (X = A, B or C) and ω0 denotes the fundamental angular frequency.…”

Section: Zero-sequence Voltage Regulation Methodsmentioning

confidence: 99%

“…There are two major fault current elimination methods: the current-controlled method and the voltage-controlled method. The current-controlled methods, such as Peterson coil and the current-controlled inverter, depend on the measurement of the distributed parameters to compensate the capacitive current [6]- [10]. The effect of current compensation lies on the measurement accuracy of distributed parameters [11]- [12].…”

Section: Introductionmentioning

confidence: 99%

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Principle of Flexible Ground-Fault Arc Suppression Device Based on Zero-Sequence Voltage Regulation

Fan

Yao

et al. 2021

IEEE Access

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Section: Zero-sequence Voltage Regulation Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Principle of Flexible Ground-Fault Arc Suppression Device Based on Zero-Sequence Voltage Regulation

Fan

Yao

et al. 2021

IEEE Access

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“…In the three-phase three-wire distribution system, a singlephase grounding fault results in the increases of the neutral voltage to phase-to-neutral value, which is an inherent phenomenon of the grid. So, the insulation requirement of the neutral point is higher, and should be considered in the design [5,10]. Thus, making the line-to-earth voltages of unfaulty phases increase to the line-to-line value, which is also an inherent phenomenon of the grid and has nothing to do with the proposed topology.…”

Section: Modelling Of Residual Voltage Under Msvrmentioning

confidence: 99%

“…Resonant grounding system can use arc suppression coil (ASC) to generate a zero-sequence compensating current to remove the impermanent single phase grounding faults by compensating the fault residual current without tripping the circuit breaker. And it is generally concluded that resonant grounding can offer the highest power-supply reliability compared with other grounding methods [4][5][6][7]. However, the residual voltage and residual current caused by grounding faults in the distribution network still seriously threaten personal safety, which has caused serious electric shock casualties' accidents in recent years [8].…”

Section: Introductionmentioning

confidence: 99%

A novel single‐phase grounding fault voltage full compensation topology based on antiphase transformer

Cai¹,

Liu²,

Huang

et al. 2021

IET Generation Trans & Dist

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Multi-tap and multi-capacitors type arc suppression coils are commonly used in distribution systems. Due to their low compensation accuracy and limited arc suppression capability, it is hardly to avoid personal safety accidents and wildfires absolutely. In this paper, a novel single-phase grounding fault voltage full compensation topology based on antiphase transformer is proposed, which is composed by an antiphase transformer, a phase-selection switch and a multi-tap single-phase voltage regulator. The proposed topology can control the neutral point voltage, thus cause the fault voltage being zero. By this way, the lack of arc suppression coil is overcome. The novel compensation topology features low costs, high precision of fault voltage compensation. The principle of the novel compensation topology is explained. The mathematical expressions of residual voltage and current are derived in detail. Finally, the simulation model and experimental platform were built. The results show that the proposed novel compensation topology can effectively make up for the shortcomings of traditional arc suppression coils when it is used with them.

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“…For the small current grounding mode compensated by arc suppression coil, some scholars have analyzed the compensation's principle of arc suppression coil, summarized several common principles of automatic tracking full compensation arc suppression coil, analyzed their respective advantages and disadvantages and application situation, and given the principle of realizing full compensation under various operating conditions in view of the existing problems [14], [15]. Some scholars [16] emphatically analyzed the control strategy of arc suppression coil ground star power electronic transformer, but the above literature did not solve the problem of arc's reliable extinguishing.…”

Section: Introductionmentioning

confidence: 99%

Research on Single-Phase to Ground Fault Simulation Base on a New Type Neutral Point Flexible Grounding Mode

et al. 2019

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There are some problems existing in the traditional grounding mode of the distribution network. To solve them, this paper proposes a flexible grounding method for neutral point. This paper analyzes the advantages and the disadvantages of single-phase ground faults occurring at different neutral grounding points and summarizes the characteristics of several existing grounding arc elimination technologies for distribution networks. Depending on the actual data of a 10-kV substation, the ATP-EMTP was used to build a 10-kV distribution network model, and an arc model based on arc length control was used for single-phase ground fault simulation. According to the simulation results, it was known that the overhead line network of arc suppression coils was compared. Permanent ground faults occur in pure cable networks which are grounded by small resistances. Flexible grounding systems have significant benefits in suppressing the inrush currents at fault points when an intermittent arc single-phase-to-ground fault occurs, the flexible grounding system causes intermittent arcing. The voltage is clearly inhibited. The flexible grounding method has certain reference value for improving the reliability of distribution network power supply and providing the safe operation of the system. INDEX TERMS Flexible grounding, arc suppression coil, ineffective grounding system, arc ground overvoltage.

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Control Strategy for Arc-Suppression-Coil-Grounded Star-Connected Power Electronic Transformers

Cited by 40 publications

References 19 publications

Principle of Flexible Ground-Fault Arc Suppression Device Based on Zero-Sequence Voltage Regulation

Principle of Flexible Ground-Fault Arc Suppression Device Based on Zero-Sequence Voltage Regulation

A novel single‐phase grounding fault voltage full compensation topology based on antiphase transformer

Research on Single-Phase to Ground Fault Simulation Base on a New Type Neutral Point Flexible Grounding Mode

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