A systematic review on grounding impedance measurement in electrical installations

Leal, Alexandre Giacomelli; Lazzaretti, André E.; Lopez-Salamanca, Henry L.

doi:10.1016/j.epsr.2022.108953

Cited by 6 publications

(1 citation statement)

References 45 publications

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“…DC system, as an important part of substation, provides reliable power supply for various equipments, but its extensive power supply network is susceptible to environmental influences, and insulation degradation or grounding faults may occur. When the DC system is not able to find out the fault location quickly after one point of grounding, if another point of insulation degradation or grounding occurs, it may lead to power system failure or even accidents, resulting in large-scale power outages [1] . Among DC system faults, DC ground faults are currently one of the most common and difficult to investigate.…”

Section: Introductionmentioning

confidence: 99%

Ground fault detection in substation DC system based on improved differential current method

Li,

Zhang,

Shen

et al. 2024

J. Phys.: Conf. Ser.

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DC system is the main electrical equipment and control signal system in the substation, and its stability and reliability are directly related to whether the power system can operate safely. This paper firstly introduces the common methods of insulation detection of DC power system in substation and its advantages and disadvantages, and proposes the differential current method based on unbalanced bridge, i.e., using the combination of unbalanced bridge and leakage current sensor to detect the insulation condition of DC system, which makes up for the defects of the traditional differential current method that can only detect the faults of simple branch circuits, and realizes the detection of multi-branch grounding under complex situations. Finally, the feasibility of this method is verified by building a simulation model through simulink.

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Section: Introductionmentioning

confidence: 99%