An improved transformer percentage restraint method based on transmission line information

Zhang, Hao; He, Jinghan; Li, Bin; Bo, Zhiqian

doi:10.1109/supergen.2009.5348384

Cited by 5 publications

(2 citation statements)

References 4 publications

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“…It is a numerical algorithm based on Bellman's optimization principle for solving multi-stage decision problems [16,17]. The multi-stage decision problem is divided into N stages by time.…”

Section: The Principle Of Dynamic Programmingmentioning

confidence: 99%

Energy management strategy based on dynamic programming for dual source trolleybus

et al. 2017

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Original scientific paperThe dual source trolleybus of a new model with battery and super capacitor energy storage system was designed. The related parameters of dynamical system were designed on the basis of theory deduction, and the simulation model was re-developed in ADVISOR software. Based on the analysis of work modes of the dual source trolleybus, an optimal control strategy based on Dynamic Programming was designed, which is aimed at reducing grid peaking power of on-line mode and energy consumption of off-line mode. In addition, the rule based control strategy has also been implemented and compared to the optimized control strategy. The results have demonstrated that the optimization techniques based on Dynamic Programming can make full use of the supercapacitors with high power and fast charging/discharging characteristics, and more effectively distribute the power between the power sources, improve the dynamic performance and economic performance of the trolleybus. Keywords: dual source trolleybus; supercapacitors; energy management; optimal control; Dynamic Programming Strategija upravljanja energijom zasnovana na dinamičkom programiranju za trolejbus s dvojnim izvorom napajanjaIzvorni znanstveni članak Dizajniran je novi model trolejbusa s dvojnim izvorom napajanja s akumulatorom i super električnim kondenzatorom, a s tim povezani parametri dinamičkog sustava dizajnirani su na temelju teorije dedukcije. Simulacijski model razvijen je u ADVISOR softveru. Zasnovana na analizi radnih modova trolejbusa s dvojnim sustavom napajanja, dizajnirana je optimalna strategija upravljanja na temelju dinamičkog programiranja čiji je cilj reduciranje vršne snage mreže on-line moda i potrošnje energije off-line moda. Uz to, upravljačka strategija zasnovana na tom pravilu također je implementirana i uspoređena s poboljšanom strategijom upravljanja. Rezultati su pokazali da metode optimizacije temeljene na dinamičkom programiranju mogu u potpunosti iskoristiti super električni kondenzator velike snage, s brzim punjenjem i pražnjenjem, i učinkovitije rasporediti energiju među izvorima energije te poboljšati dinamičke i ekonomske karakteristike trolejbusa.Ključne riječi: trolejbus s dvojnim izvorom napajanja; super električni kondenzator; upravljanje energijom; optimalno upravljanje; dinamičko programiranje

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“…It is a numerical algorithm based on Bellman's optimization principle for solving multi-stage decision problems [16,17]. The multi-stage decision problem is divided into N stages by time.…”

Section: The Principle Of Dynamic Programmingmentioning

confidence: 99%

Energy management strategy based on dynamic programming for dual source trolleybus

et al. 2017

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“…A differential current threshold value is usually needed to avoid the effect of unbalancing current when the current is passing thought the transformer. For ratio differential protection when a winding fault or a high impedance ground fault occurs, often it requires the value to be as small as possible [1]. The ratio of differential protection can affect the action zone of differential current and restraint current.…”

mentioning

confidence: 99%

Accelerate protection scheme in integrated protection system

Zhang

Yip

et al. 2011

2011 2nd IEEE PES International Conference and Exhibition on Innovative Smart Grid Technologies

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Transformer is one of the most important elements in power system, and current differential protection has been the main protection technique for transformer unit. This protection technique, however, suffers a low sensitivity or reliability due to the problems such as CT saturation and transformer magnetizing inrush. Based on digital substation system, studies have found that the fault generated electric quantities can not only be used by the relay to achieve the line protection but also used for developing transformer protection techniques. The protection system can accelerate trip time if fault happen. The results from simulation test show that the new method is with simple principle and good reliability.

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Analyzing the Efficacy of Differential Relay Systems for Transformer Protection Under Different Internal Faults

Rafi,

Bhuiyan,

Mohammad

et al. 2023

2023 10th IEEE International Conference on Power Systems (ICPS)

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An improved transformer percentage restraint method based on transmission line information

Cited by 5 publications

References 4 publications

Energy management strategy based on dynamic programming for dual source trolleybus

Energy management strategy based on dynamic programming for dual source trolleybus

Accelerate protection scheme in integrated protection system

Analyzing the Efficacy of Differential Relay Systems for Transformer Protection Under Different Internal Faults

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