An Intelligent Algorithm for the Protection of Smart Power Systems

Xyngi, Ioanna; Popov, Marjan

doi:10.1109/tsg.2013.2244621

Cited by 58 publications

(37 citation statements)

References 7 publications

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“…The detailed specifications of the system are available in Chabanloo et al 29 Both ends of feeders are equipped with OCRs, and directional relays as the topology can be changed, and consequently, the direction of power flows will change. OCRs 2,5,10,12,14,17,20,23,25,and 27 are blocked by the directional relays, and they are not considered in protection coordination. Table 13 provides the maximum load and fault currents.…”

Section: Test Casementioning

confidence: 99%

“…[8][9][10] Communication-assisted protection is more efficient compared to noncommunication-assisted methods, [11][12][13] especially for grids with distributed generations (DGs). [8][9][10] Communication-assisted protection is more efficient compared to noncommunication-assisted methods, [11][12][13] especially for grids with distributed generations (DGs).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Optimal time‐current graded coordination of multistage inverse‐time overcurrent relays in distribution networks

Hamidi

Ahmadian

Patil

et al. 2019

Int Trans Electr Energ Syst

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Summary This paper proposes a method for optimal coordination of multistage overcurrent relays (OCRs) in radial distribution networks, including industrial, rural, and urban grids. The proposed method optimally coordinates multistage time‐current curves (TCCs) using the genetic algorithm (GA). The proposed method is able to determine the proper TCC type (eg, moderately inverse, very inverse, and extremely inverse), pickup current, and time‐setting multiplier (TSM) for each stage of TCCs. The proposed method utilizes the dynamic models of OCRs and fuses. This safeguards the relays against the maloperations resulting from the DC decaying part of fault currents and transient overcurrents caused by transformer energization or motor starting. The proposed method is evaluated using DIgSILENT Power Factory for power system analysis and Matlab for implementation of the proposed method. According to the simulation outcomes, the advantages and disadvantages of the proposed method are discussed and compared with the existing methods.

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Section: Test Casementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimal time‐current graded coordination of multistage inverse‐time overcurrent relays in distribution networks

Hamidi

Ahmadian

Patil

et al. 2019

Int Trans Electr Energ Syst

View full text Add to dashboard Cite

show abstract

“…It is claimed that the ordinary protection schemes are based on over current or inverse time characteristics which take longer time to trip wasting lot of energy during faults that sounds interesting and worth harvesting but amount of energy loss is just a few kWh. Smart algorithms are shown without transient stability studies how the current chopping phenomenon will cause surges (V=Ldi/dt) if breaker opening time is reduced [28]. Telecom companies use coordinated protocols such as frequency hopping spread spectrum (FHSS), direct sequence spread spectrum (DSSS) and chirp spread spectrum (CSS) as anti-jamming schemes [29].…”

Section: Technical Challengesmentioning

confidence: 99%

A specter of logical challenges haunts smart grid

Khan¹,

Rauf²,

Abas³

et al. 2013

SGCE

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Smart and super grid visions have attracted electrical engineers worldwide. Smart grid offers innumerable advantages over conservative electric grid due to widespread integration of information and communication technologies (ICT). Information technology (IT) stimulates conscious in dumb electric grid hardware to think at its own how to operate economically in varying load conditions conducting real-time state estimation. Smart grid promises to offer bidirectional power flow capability and self-healing ability against faults. Advance metering infrastructures (AMI) help utilities track down power thefts supplying consumer home automation facilities. Smart grid helps stiff utilities to reduce operational losses and generation deficient utilities to implement live load shedding instead of revolving blackouts to help customers keeping their lights on during virtual load shedding. Smart grid promises package is subject to its complete implementation by the end of long road ahead. Communication capacity and speed limitations, cyber security risks, faults and traffic congestions have to be considered prior to rollout. This paper describes a live load shedding scheme for existing electric grids on 11kV feeders using smart grid option and evaluates technical, economic, societal and bio-effects challenges that smart grid vision might face ahead.

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“…Directional overcurrent relays are mainly used in ring-type distribution systems. However, directional overcurrent protection was introduced to radial distribution systems [6], [7] due to the massive DG integration experienced the last years. Directional overcurrent relays with communication capabilities are used in a radial network in [8] to minimize the number of disconnected DG units in case of faults.…”

Section: Introductionmentioning

confidence: 99%

A Communication-Assisted Overcurrent Protection Scheme for Radial Distribution Systems With Distributed Generation

Nikolaidis

Papanikolaou

Safigianni

2016

IEEE Trans. Smart Grid

142

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Conventional overcurrent protection schemes for radial distribution systems usually attempt to coordinate a recloser at the beginning of the feeder with the fuses on the laterals. The integration of distributed generation in distribution systems leads to problems related to protection coordination that are difficult to be solved by applying conventional protection techniques. This paper proposes an efficient communicationbased protection scheme that implements common directional overcurrent relays instead of reclosers at the line, assisted by intertripping and blocking transfer functions. The proposed protection strategy guarantees selectivity regardless of whether the generating units are connected to the network or not, and can be designed retaining either the fuse-blowing or fuse-saving philosophy. Meaningful conclusions are derived from the application of the scheme on a test distribution system.

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An Intelligent Algorithm for the Protection of Smart Power Systems

Cited by 58 publications

References 7 publications

Optimal time‐current graded coordination of multistage inverse‐time overcurrent relays in distribution networks

Optimal time‐current graded coordination of multistage inverse‐time overcurrent relays in distribution networks

A specter of logical challenges haunts smart grid

A Communication-Assisted Overcurrent Protection Scheme for Radial Distribution Systems With Distributed Generation

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