Advances in protective device interlocking for improved protection and selectivity

Valdes, Marcelo E.; Dougherty, John J.

doi:10.1109/pcicbrasil.2014.6968896

Cited by 10 publications

(2 citation statements)

References 9 publications

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“…13 [3] . This threshold could be a simple 10C or a partial differential sum operated upon by the 10C algorithm As can be seen from this model the ability to show the blocking signal from the LV CB and the timing requirement for the MV relay allows the ZSI enabled partial differential zone to be set on top of the curve of the LV CB blocking the relay.…”

Section: -mentioning

confidence: 99%

Considerations for differential protection in LV buses

Sevov¹,

Valdes²

2016

2016 IEEE/IAS 52nd Industrial and Commercial Power Systems Technical Conference (I&CPS)

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Current-differential principles are well known and commonly used for protection of medium and large size transformers, large motors, medium voltage (MV) generators, medium and high voltage buses, and any type of important power equipment with measurable input and output currents . However, is it practical to protect low voltage distribution buses using differential protection? This paper will describe bus differential protection principles as well as interlocking principles for overcurrent protection. It will discuss specific issues in applying differential protection in LV systems. It will present a concept of partial differential protection, which can be used in conjunction with Zone-Selective-Interlocking (ZSI), or as backup to traditional overcurrent protection to achieve high-speed and selective fault clearance . Additional concepts for implementation of bus differential protection using networked data in low voltage systems will be introduced .Index Terms -ZSI (Zone Selective Interlocking), partial differential protection, phasor, arc flash protection, selectivity I.

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Section: -mentioning

confidence: 99%

Considerations for differential protection in LV buses

Sevov¹,

Valdes²

2016

2016 IEEE/IAS 52nd Industrial and Commercial Power Systems Technical Conference (I&CPS)

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“…In a power system with single power source, the conventional ZSI function can work well [1] [2]. As shown in fig.…”

Section: Introductionmentioning

confidence: 99%

Zone Selective Protection System with Multiple Power Sources

Chen

Zhuo

et al. 2014

AMM

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In the power system with multiple power sources, the fault current direction is not fixed. Therefore, the conventional ZSI protection is not suitable. Furthermore, the ZSI protection with fault current direction judgment function is required. In this paper, the R, L property based fault current direction judgment method is proposed. This method is verified based on the simulation and test result. The validation shows this method can correctly judge the fault current direction within shorter time than state of art method.

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Fast bus protection using IEC 61850

Goff

Eltom

Saeed

2015

2015 IEEE Industry Applications Society Annual Meeting

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International Electrotechnical Commission (IEC) 61850 is the latest technology that allows electric power utilities to build low cost digital substations. Because limited objective information is available, electric power utilities desire independent evaluations of IEC 61850 from end users. The objective of this study was to compare the IEC 61850 method to the hardwired method to find an optimal solution for the fast bus protection scheme. System disturbance clearing time, engineering and construction costs, and interoperability between multivendor microprocessor-based relays were used as the criteria for the evaluation. This research measured the protection speed of the hardwired method and the IEC 61850 method for the fast bus protection scheme, utilizing relays from the same and mixed manufacturers. The results of the study show that IEC 61850 method is simple, cost effective, and offers speed of operation comparable to the hardwired method. iv TABLE OF CONTENTS LIST OF TABLES vi LIST OF FIGURES vii

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Advances in protective device interlocking for improved protection and selectivity

Cited by 10 publications

References 9 publications

Considerations for differential protection in LV buses

Considerations for differential protection in LV buses

Zone Selective Protection System with Multiple Power Sources

Fast bus protection using IEC 61850

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