Digital communications for power system protection: security, availability, and speed

Schweitzer, Edmund O.; Behrendt, K.; Lee, T.; Tziouvaras, D.A.

doi:10.1049/cp:20010108

Cited by 15 publications

(23 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Teleprotection concept has been mostly applied in general power system transmission line network for many years to enhance protection system's speed, reliability and sensitivity. The following example teleprotection methods have been applied in transmission line networks [5][6]:…”

Section: Teleprotection Schemesmentioning

confidence: 99%

A Case Study on Thailand’s New Teleprotection Regulation: Direct Transfer Trip Application in Distributed Generation Network

Chotiwanaporn¹,

Chompoo-inwai²

2017

IJIES

View full text Add to dashboard Cite

This research paper presents the new idea of applying the transmission line teleprotection scheme called direct transfer trip (DTT) technique to use with a closed-loop distribution network. A large-scale 163MW gas turbine power plant connected to a three-substation closed-loop distribution network was chosen to be a case study here. A newly-proposed DTT configuration, DTT logic diagram and circuit breaker trip matrix had been redesigned and presented in this paper. For the proposed DTT configuration, several remote terminal units will be installed at every substation connected to the distribution network, whereas the logic controller will be installed at the selected power plant. A huge advantage over the conventionally-installed zoning peer-to-peer protection scheme is that the proposed DTT logic controller is able to almost instantaneously compute and send out the clearing faults command, regardless of fault locations in this particular closed-loop distribution network, while the conventional one cannot in many cases. Additional benefit is that the proposed DTT teleprotection scheme completely prevent the generators from operation in island mode resulting in minimal lost and damages caused from this circumstance. The relay test tool is used to verify the proposed DTT protective capabilities and speed. The simulation and commissioning test results confirm the proper functionality of the proposed technique. The implementation to the real field has been done and presented here as well. What we have learned from this case study shall be a very good guideline for other similar circumstances.

show abstract

Section: Teleprotection Schemesmentioning

confidence: 99%

A Case Study on Thailand’s New Teleprotection Regulation: Direct Transfer Trip Application in Distributed Generation Network

Chotiwanaporn¹,

Chompoo-inwai²

2017

IJIES

View full text Add to dashboard Cite

show abstract

“…For that calculation, it is necessary to have the apparent impedance value at the terminal (taken from the event report), knowledge of the ground currents at the two terminals, and the line impedance from the terminal to the fault point. Therefore, the fault point has to be known or well estimated (4).…”

Section: ) Impedance Analysismentioning

confidence: 99%

“…For instance, the appendix in [4] shows that the reactive reach can have an overreach effect depending on its settings, mainly due to the angle error from potential transformers but also due to the system nonhomogeneity, load conditions, and inherent relay errors. For example, a fault at the remote busbar can have the same reactance measured inside the first reactance zone.…”

Section: B Cautionmentioning

confidence: 99%

“…For example, a fault at the remote busbar can have the same reactance measured inside the first reactance zone. The error can be compensated through a bias for the polarization angle or through the reduction of the reactive reach for Zone 1 [4].…”

Section: B Cautionmentioning

confidence: 99%

“…The 121. 4 Transener uses a dual main protection system at each terminal. The characteristics of the relays are mho for phase elements and mho and quadrilateral for ground elements.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Very high-resistance fault on a 525 kV transmission line - Case study

Maezono¹,

Altman²,

Brito³

et al. 2009

2009 62nd Annual Conference for Protective Relay Engineers

View full text Add to dashboard Cite

This paper analyzes a 300 ohm primary ground fault, which is an unusually high value for a 525 kV transmission line in southeastern Brazil. This case study emphasizes the techniques used by the analysts.Considering that the fault impedance was larger than those usually observed in single-phase faults on extra-high-voltage (EHV) lines, this paper discusses the probable cause of the fault and mentions an analysis technique to evaluate such faults. The protective relaying community lacks information regarding the causes and values of fault resistances to ground on high-voltage (HV) and EHV transmission lines. The objectives of this paper are to stimulate research and contribute to the collection of very high-resistance fault information.The analysis techniques are presented using symmetrical components and fault calculations to arrive at fault parameter values that are very close to the ones provided by protective relays. The performance of the line protection is evaluated for the specific fault conditions, with calculation of the observed impedances and currents. The importance of the ground overcurrent directional protection on a pilot directional comparison scheme is shown. Speculation on the widespread use of differential protection for transmission lines should stimulate discussions of line protection philosophies and applications.The criteria for the resistive reach setting of the quadrilateral ground distance characteristic are presented to show an evolution of past criteria and to open discussion about the setting limits.The conclusions of this paper highlight the importance of present event report analysis techniques regarding fault calculation software and the need for appropriate settings criteria for the resistive ground distance element threshold. This paper also supports the use of ground directional overcurrent protection with a pilot scheme for HV and EHV transmission line protection, while proposing the widespread use of differential functions for transmission lines, even for the most extensive cases.

show abstract

Behaviour Evaluation of GOOSE Message Traffic between Power Substations: A POTT Scheme Case Study

Miranda

Netto²,

Coury³

et al. 2013

J Control Autom Electr Syst

View full text Add to dashboard Cite

Digital communications for power system protection: security, availability, and speed

Cited by 15 publications

References 3 publications

A Case Study on Thailand’s New Teleprotection Regulation: Direct Transfer Trip Application in Distributed Generation Network

A Case Study on Thailand’s New Teleprotection Regulation: Direct Transfer Trip Application in Distributed Generation Network

Very high-resistance fault on a 525 kV transmission line - Case study

Behaviour Evaluation of GOOSE Message Traffic between Power Substations: A POTT Scheme Case Study

Contact Info

Product

Resources

About