Faulty Feeder Detection Based on Space Relative Distance for Compensated Distribution Network With IIDG Injections

Wang, Yuan‐Yuan; Chen, Qiaoshan; Zhang, Xiangjun; Huang, Xiancheng; Qin, Song

doi:10.1109/tpwrd.2020.3004810

Cited by 17 publications

(4 citation statements)

References 21 publications

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“…Note that, when a single-phase grounding fault occurs, the ASC and the proposed topology are immediately activated, so that the fault voltage can be well compensated, and the distribution system can be allowed to operate during the faulty period for 1-2 h, so the circuit breaker will not be tripped immediately [3,[10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. After a certain delay, the phase selection switch of the proposed topology trips.…”

Section: Costs Comparison With Existing Methodsmentioning

confidence: 99%

“…The phase‐selection switch is used to select the fault phase and connect the antiphase transformer and the MSVR. The specific phase selection methods can be referred to in terms of studies on faulty phase selection [23–25]. Finally, the neutral point voltage can be adjusted to

U_{N} = - E_{j}

, which satisfies Equation (2), and thus the fault voltage is fully compensated.…”

Section: Principle Of Full Compensation For Single‐phase Grounding Faultmentioning

confidence: 99%

See 1 more Smart Citation

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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Section: Costs Comparison With Existing Methodsmentioning

confidence: 99%

U_{N} = - E_{j}

, which satisfies Equation (2), and thus the fault voltage is fully compensated.…”

Section: Principle Of Full Compensation For Single‐phase Grounding Faultmentioning

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

View full text Add to dashboard Cite

show abstract

“…Most of the 3~66 kV power supply systems in China's petrochemical enterprises adopt neutral point non-effective grounding. Among them, due to the compensation effect of the arc suppression coil, the resonant grounding system has the disadvantages of the fault characteristic quantity not being obvious, and the fault detection being difficult after the single-phase grounding fault occurs [1][2][3][4][5], resulting in a worse faulty feeder detection effect [6,7].…”

Section: Introductionmentioning

confidence: 99%

Faulty Feeder Detection Based on Grey Correlation Degree of Adaptive Frequency Band in Resonant Grounding Distribution System

et al. 2023

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Due to the particularity of their process, petrochemical enterprises have high requirements for the reliability of power supply. If a large-scale blackout occurs due to a grounding fault, it will pose a huge threat to safe production. When the resonant grounding system of petrochemical enterprises faults, due to the complex fault process and weak fault signal, it is difficult to accurately detect the faulty feeder by traditional methods. This paper presents a new method of grey correlation degree based on adaptive frequency band. Firstly, the transient zero-sequence current of each feeder is decomposed by coif5 wavelet, and the low frequency band a5 (power frequency component) and high frequency band d1, d2 (noise signal) are removed. By stacking all of the remaining frequency band signals to construct the wavelet area matrix, the faulty feeder detection characteristic scale and the first faulty feeder detection result are obtained. Secondly, based on the faulty feeder detection characteristic scale, the second faulty feeder detection result is obtained by the average grey correlation degree matrix, which detects the faulty feeder according to the waveform correlation degree. Finally, the final faulty feeder detection result is obtained by equal weight voting. In MATLAB/Simulink, the 10 kV resonant grounding system of petrochemical enterprises is modeled. A large number of simulation results show that the faulty feeder detection method is not affected by the initial phase angle (0°, 45° and 90°), transition resistance (10 Ω, 100 Ω and 1000 Ω), fault distance (1 km, 8 km and 15 km) and overcompensation degree (5%, 8% and 10%), and has good sensitivity.

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“…Moreover, the relationship among ride through time and short-circuit current is studied, and the short-circuit response of IIDG under different fault conditions was analyzed. In [17], a more accurate IIDG current estimation model based on the Gauss-Seidel method that considered the control strategy at the moment of fault was established. Moreover, the authors proposed a novel faulty feeder detection approach which used the zero-sequence current space relative distance.…”

Section: Introductionmentioning

confidence: 99%

Fault Calculation Method of Distribution Network Based on Deep Learning

Zhang

Peng

et al. 2021

Symmetry

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Under the low voltage ride through (LVRT) control strategy, the inverter interfaced distributed generation (IIDG) needs to change the output mode of the inverter according to the voltage of the connected nodes. The short-circuit current is related to the system rated capacity, network short-circuit impedance, and distributed power output. So, based on the deep learning algorithm, a predicting method of the voltage drop is proposed. By predicting the voltage of connected nodes, the output mode of IIDG can be determined based on the LVRT control. Thus, the fault calculation model of IIDG is accurately established. Compared with the three-phase asymmetric Gaussian fault calculation method, the proposed method can achieve fault calculation accurately. Finally, a case study is built to verify the effectiveness of the proposed method. The results indicate that the proposed method can make accurate voltage prediction and improve the computation speed of the fault calculation.

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Faulty Feeder Detection Based on Space Relative Distance for Compensated Distribution Network With IIDG Injections

Cited by 17 publications

References 21 publications

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

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

Faulty Feeder Detection Based on Grey Correlation Degree of Adaptive Frequency Band in Resonant Grounding Distribution System

Fault Calculation Method of Distribution Network Based on Deep Learning

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