MICROPROCESSOR SELECTIVE PROTECTION FROM THE PHASE TO THE EARTH FAULT IN ELECTRIC NETWORKS WITH PETERSEN COIL IN NEUTRAL

Nowadays it is thought that distribution power networks have the ability to isolate damaged power network place by making optimal links, to identify the fault character, to recognize the character of transients, to establish the fault cause and estimate the state of electrical equipment. For such an objective, fast identification of the earth fault and its place location is a very important problem which requires reliable solutions. The paper describes the new algorithm of earth fault detection and location which is based on the analysis of the initial processes of the fault and its keystone elements. The earth fault detection and location algorithm has been implemented in distribution network state identification terminals. Ill. 6, bibl. 11 (in English; abstracts in English and Lithuanian).http://dx.doi.org/10.5755/j01.eee.111.5.356

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Method for automatic compensation of a single-phase earth fault

Bulletin of Electrical Engineering and Informatics ◽

10.11591/eei.v10i3.3021 ◽

2021 ◽

Vol 10 (3) ◽

pp. 1164-1172

Author(s):

Martebe K. Zhankuanyshev ◽

Bibara Zh. Kushkimbayeva ◽

Sofya Sh. Egemberdieva ◽

Zhanar S. Esdauletova ◽

Laura N. Yesmakhanova

Keyword(s):

Power Supply ◽

Single Phase ◽

Neutral Current ◽

Reliable Operation ◽

Automatic Compensation ◽

Electric Networks ◽

Earth Fault ◽

Fault Currents ◽

Neutral Mode ◽

The Relationship

The paper demonstrates improving the reliability of power supply and operating safety of power receivers in electric networks of 6-10 kV, by controlling the neutral mode in extended electric networks of 6-10 kV with capacitive earth fault currents above 15 A. The purpose of the study is to increase the reliability of power supply and the safety of operation of power receivers in such electric networks, the establishment of patterns in controlling the neutral mode in extended 6-10 kV electric networks with capacitive earth fault currents above 15 A, as well as the development of a method and device automatic detection of single-phase earth fault current. Grounding methods and neutral modes in electric networks with a voltage of 6-10 kV are considered. The method and device for automatically determining the current of a single-phase earth fault were developed. In the result, the relationship between the active and inductive components of the neutral current during series RL grounding of the network Ia/IL=(0.5÷0.3) was established, which ensures reliable operation of the SPEF protection of both current and directional principles including the changes of capacity abruptly networks caused by switching outgoing lines.

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Evaluation of earth fault location algorithm in medium voltage distribution network with correction technique

International Journal of Electrical and Computer Engineering (IJECE) ◽

10.11591/ijece.v9i3.pp1987-1996 ◽

2019 ◽

Vol 9 (3) ◽

pp. 1987

Author(s):

N. S. B. Jamili ◽

M. R. Adzman ◽

S. R. A. Rahim ◽

S. M. Zali ◽

M. Isa ◽

...

Keyword(s):

Fault Location ◽

Distribution Network ◽

Distance Estimation ◽

Voltage Distribution ◽

Medium Voltage ◽

Earth Fault ◽

Ground Fault ◽

The Earth ◽

Correction Technique ◽

Location Algorithm

This paper focused on studying an algorithm of earth fault location in the medium voltage distribution network. In power system network, most of the earth fault occurs is a single line to ground fault. A medium voltage distribution network with resistance earthing at the main substation and an earth fault attached along the distribution network is modeled in ATP Draw. The generated earth fault is simulated, and the voltage and current signal produced is recorded. The earth fault location algorithm is simulated and tested in MATLAB. The accuracy of the earth fault location algorithm is tested at several locations and fault resistances. A possible correction technique is explained to minimize the error. The results show an improvement fault location distance estimation with minimum error.

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