Advanced commercial power system protection practices applied to naval medium voltage power systems

Whitehead, D.W.; Fischer, Normann

doi:10.1109/ests.2005.1524713

Cited by 10 publications

(7 citation statements)

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“…This is based on the relationship between the positive-sequence voltage and zero-sequence current phase angle of the faulted phase; see reference [18]. Establish the distance of the fault location on the faulted feeder from the feeder breaker; see reference [17] [18]. Trip the main breaker with proper coordination between the main breaker and the feeder breakers.…”

Section: A Discussion Of Ground Fault Protection and Coordination Fomentioning

confidence: 99%

“…10. Reference [18] proposes a ground-directional unit that uses the zero-sequence voltage and zero-sequence current magnitudes, along with the direction of current flow. Such ground-directional units supervise the ground overcurrent protection devices shown on Fig.…”

Section: Fig 7 Zero-sequence Voltage Detection Arrangementmentioning

confidence: 99%

“…The faulted feeder detects the fault in the forward direction; whereas the unfaulty feeder's direction should be reverse or none. It depends on the magnitude of the feeder's capacitive charging current to be relatively high or low respectively [18]. Reference [17] discusses the algorithm to detect the faulted phase and distance of the fault location.…”

Section: Fig 7 Zero-sequence Voltage Detection Arrangementmentioning

confidence: 99%

“…Protection relays discussed in this paper for the MV HRG system require both the correct fault current direction and correct power factor for the ground-fault current; see [17] [18]. 5) Future research is recommended to validate that the arcing fault of the MV HRG system ranges from 20% to 80% of the bolted line-ground fault current [4][5].…”

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confidence: 99%

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High-Resistance Grounded Power System

Paul¹

2015

IEEE Trans. on Ind. Applicat.

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To minimize ground fault during a line-to-ground fault condition, it has been a common practice to use highresistance grounded (HRG) power systems, both at low voltage (LV) and at medium voltage (MV). The criteria for designing HRG systems are very well known to the industry; however, the opinions of industry experts have been divided on limiting the use of HRG systems for MV systems to voltages of less than 4.16 kV and phase-ground fault currents of less than 10 A without clarifying that it applies to systems which require continuous operation upon detecting first line-to-ground fault as it is now in reference [1]. This paper will review the background history of HRG power systems and their application to MV systems for specific industries and will make the case that voltages need not be limited to less than 4.16 kV and phase-ground fault current less than 10A, so long as the faulted power system is isolated within 10 cycles and there are no direct connected motors. This paper will discuss the potential damage and protection requirements of HRG systems for MV applications to ensure that a line-to-ground fault is cleared before it involves other phases to make a multiphase arcing ground fault.Index Terms-Arcing fault, fault resistance, ground fault protection relay, high-resistance grounded system, system charging current. 0093-9994 (c)

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Section: A Discussion Of Ground Fault Protection and Coordination Fomentioning

confidence: 99%

Section: Fig 7 Zero-sequence Voltage Detection Arrangementmentioning

confidence: 99%

Section: Fig 7 Zero-sequence Voltage Detection Arrangementmentioning

confidence: 99%

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confidence: 99%

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High-Resistance Grounded Power System

Paul¹

2015

IEEE Trans. on Ind. Applicat.

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“…Although the ungrounded power systems are not connected intentionally to the ground, a capacitive coupling between the phase conductors and ground exists [7] [17]. The ungrounded power system allows continuity of supply to the healthy phases with the single-phase fault [18] and is relatively safe for the personnel with a ground fault [13], as the fault current is typically low (around 1 A). However, this method of grounding is characterized by high overvoltage transients and the exact fault location is not possible [13].…”

Section: A Power System Groundingmentioning

confidence: 99%

Review of network topologies and protection principles in marine and offshore applications

Ciontea

Bak

Blaabjerg

et al. 2015

2015 Australasian Universities Power Engineering Conference (AUPEC)

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An electric fault that is not cleared is harmful in land applications, but in marine and offshore sector it can have catastrophic consequences. If the protection system fails to operate properly, the following situation may occur: blackouts, fire, loss of propulsion, delays in transportation, collision with the cliff, reef or other ships and electrical shocks to humans. In order to cope with the unwanted effects of a fault, several protection strategies are applied, but complexity of the marine and offshore applications is continuously increasing, so protection needs to overcome more and more challenges. As result, development of new protection techniques that can offer improved functionalities compared to the actual solutions for marine and offshore applications is needed. This paper reviews the network topologies in such applications and presents the requirements of a system able to protect them. Also, a brief overview of the protection principles for a generic power system is presented.

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Design of a reliable and coordinated protection strategy for zonal shipboard power systems

Mohammadzamani,

Sadeghkhani,

Moazzami

2023

IET Electrical Syst in Trans

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The reliable performance of the shipboard power system (SPS) is essential for the safe and efficient operation of marine vessels. SPSs are subject to various types of electrical faults that can cause equipment failure, system downtime, and even catastrophic events. One effective way to provide redundancy and fault tolerance in the event of a fault or failure is through the use of zonal configuration. However, the protection of such systems is a challenging task due to their complex topology and the potential for multiple sources of fault. Therefore, it is imperative to protect the SPS with zonal configuration from various types of fault to ensure its continuous operation. This article presents a comprehensive coordinated protection strategy for a hybrid AC/DC SPS with the zonal configuration by using the available protective equipment. The proposed strategy consists of fault current limiting, grounding, fault detection, and faulty section isolation, and provides both primary and backup protections for all SPS equipment, including generator, busbar, line, input and output feeders, loads, propulsion motors, and DC system. Also, it does not require a comprehensive communication infrastructure and training dataset. The selective and reliable performance of the proposed protection strategy is verified through several case studies under various fault scenarios in the ETAP environment. The article provides valuable insights into the selection and implementation of appropriate protection measures for the SPS with ring configuration which are useful for the designers, operators, and maintenance personnel, improving the reliability and safety of these critical and autonomous systems.

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Advanced commercial power system protection practices applied to naval medium voltage power systems

Cited by 10 publications

References 0 publications

High-Resistance Grounded Power System

High-Resistance Grounded Power System

Review of network topologies and protection principles in marine and offshore applications

Design of a reliable and coordinated protection strategy for zonal shipboard power systems

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