Accelerated protection of distribution systems with tapped off loads

Bo, Zhiqian; Dong, X.Z.; Caunce, B.R.J.

doi:10.1049/ip-gtd:20040696

Cited by 5 publications

(5 citation statements)

References 11 publications

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“…The publication entitled "Accelerated protection of distribution systems with tapped off loads [7]" presents an accelerated operation scheme for the protection of distribution systems with tapped off loads. In the scheme, the relays are arranged to have two operation modes depending on their locations in the time-grading coordination, which are the fixed time setting and the accelerated operating modes.…”

Section: A223 Hidden Failuresmentioning

confidence: 99%

“…Implementation: A sample three-phase power system has been simulated using MATLAB software [7]. The line currents are processed using an online wavelet transform algorithm to obtain wavelet MRA coefficients.…”

Section: A24314 Performance Evaluation Of An Adaptive-network Basmentioning

confidence: 99%

“…The microgrid protection in islanded operation poses a serious problem. It was shown in 6,7 that the fault currents for a grid-connected and islanded microgrid are significantly different. Additionally, high penetration of inverter connected distributed generation and storage sources lead to conditions where no standard overcurrent protection methods will suffice.…”

Section: Introductionmentioning

confidence: 99%

“…A practical system, described in Section 8.3.4, is chosen from 7,8 to investigate the protection scheme. The increased reliability of adding an additional line to form a loop structure is also explored.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Fault Locating, Prediction and Protection (FLPPS)

Yinger¹,

Venkata²,

Centeno³

2010

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Section: A223 Hidden Failuresmentioning

confidence: 99%

Section: A24314 Performance Evaluation Of An Adaptive-network Basmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fault Locating, Prediction and Protection (FLPPS)

Yinger¹,

Venkata²,

Centeno³

2010

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“…Unbalance ratio R i , R v are used to detect the asymmetrical fault and they are defined as [11,12] : In most situations, the ratio R i is significant to detect the fault occurrence, while for the single phase to ground fault in neutral point isolated system, R v can take effect. For the relay without source behind, the unbalance voltage ratio is always significant enough for fault detection.…”

Section: Operating Logic Of Directional Relaymentioning

confidence: 99%

Novel directional comparison protection for distribution lines

Xiang

Yuan

et al. 2008

Sci. China Ser. E-Technol. Sci.

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For quickly clearing up a fault of distribution lines, which concerned with complex structure and operating modes, a directional comparison protection is necessary. The paper evaluated the traditional directional relay through modeling a typical distribution system and presented a novel negative sequence directional relay and a new directional comparison protection scheme specially designed for distribution systems. In the relay and the protection scheme, a particular negative sequence component has been constructed to solve the problem that there is no negative sequence component in a symmetrical fault case so that they could operate correctly in both asymmetrical fault and symmetrical fault. Extensive EMTP simulation studies proved that the protection schemes are able to provide fast and reliable responses for all fault conditions. In particular, they are able to give correct responses adapting to the change of system operation conditions, including the changing of system configuration, power flow direction, and source and tapped-offload conditions. distribution lines, negative sequence directional relay, directional comparison protection

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Optimizing solution of fault location using single terminal quantities

Dong

Shi

Cui

et al. 2008

Sci. China Ser. E-Technol. Sci.

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This paper firstly evaluated the impedance method and traveling waves method for fault location, and studied the robustness of fault location method based on impedance. Then it proposed an assembled fault location method for a transmission line based on single-terminal electrical quantities, in which the fault zone was firstly determined by impedance method with robustness then the accurate fault position was pinpointed by traveling waves method. EMTP (Electromagnetic Transient Program) simulations showed that the proposed method can overcome the drawbacks of impedance method and traveling waves method when either one is used alone, and improve both the accuracy and the reliability of fault location.transmission line, accurate fault location, traveling waves method, impedance method, assembled method

show abstract

Accelerated protection of distribution systems with tapped off loads

Cited by 5 publications

References 11 publications

Fault Locating, Prediction and Protection (FLPPS)

Fault Locating, Prediction and Protection (FLPPS)

Novel directional comparison protection for distribution lines

Optimizing solution of fault location using single terminal quantities

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