Supervisory control of dynamic voltage restorers

Ramachandaramurthy, Vigna K.; Atputharajah, A.; Fitzer, C.; Zhan, Changjiang; Barnes, Mike; Jenkins, Nick

doi:10.1049/ip-gtd:20040506

Cited by 42 publications

(28 citation statements)

References 9 publications

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“…The basic function of DVR is to inject dynamically voltage required, VDVR to compensate sagging occurrence. Generally, the operation of DVR can be categorized into two modes; standby mode and injection mode [6]. In standby mode, DVR either in short circuited operation or inject small voltage to cover voltage drop due to transformer reactance losses.…”

Section: B Principal Of Operationmentioning

confidence: 99%

Mitigation of Unbalanced Voltage Sag by using Custom Power Devices

Hedau¹,

Mude²,

Pullawar³

2017

International Journal of Innovative Research in Electrical, Ele

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Unbalanced Voltage sag is literally one of power quality problem and it become severe to industrial customers. Voltage sag can cause miss operation to several electronic equipments. That problem can be mitigating with voltage injection method using custom power device, Dynamic Voltage Restorer (DVR). This paper presents modelling and analysis of a DVR using Matlab/Simulink. The performance of the DVR depends on the efficiency of the control technique involved in switching the inverter. This paper proposed two control techniques which is PI Controller (PI) and Fuzzy Logic Controller (FL) kalman filter. Comprehensive results are presented to assess the performance of each controller as the best power quality solution. Other factors that also can affect the performance and capability of DVR are presented as well.

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Section: B Principal Of Operationmentioning

confidence: 99%

Mitigation of Unbalanced Voltage Sag by using Custom Power Devices

Hedau¹,

Mude²,

Pullawar³

2017

International Journal of Innovative Research in Electrical, Ele

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“…Thus DVR is based on injection of necessary voltage when voltage sag occurs in order to compensate it. DVR functionality can be categorized as two modes: standby mode and injection mode [12]. In the standby mode a low voltage is injected into the network in order to cover voltage sag caused by transformer reactance losses.…”

Section: Dvr's Structure and Functionalitymentioning

confidence: 99%

Modifying Power Quality's Indices of Load by Presenting an Adaptive Method based on Hebb Learning Algorithm for Controlling DVR

et al. 2014

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Original scientific paperHaving electricity with high quality is one of the more important aims in electrical systems. Disturbances in distribution systems can change voltage waveform. There are some methods to prepare high power quality for sensitive loads. In this research we use "Dynamic Voltage Restorer" to compensate the harmful effects of disturbances on voltage. Since power systems fundamentally have complicated dynamic behavior, especially during faults, "Hebb" learning self-tuning controller, which is a powerful adaptive controller, has been used. In order to improve the performance of this controller from point of view of power quality's indices, such as flash and sensitive load voltage THD, a new structure is proposed for this controller with fuzzification method. Simulation results indicate better operation of the system for the case of proposed controller. Voltage sag and harmonics in faulty conditions are both improved by the proposed controller. According to simulation results, it works better than both classical PI controller and conventional Hebb learning controller.Key words: DVR, Sensitive load, Power quality, Fuzzy membership function, Multi-objective Hebb learning algorithm, Self-tuning controller Promjena indikatora kvalitete električne energije trošila predstavljanjem adaptivne metode za upravljanje DVR-om zasnovane na Hebbovom algoritmu učenja. Jedan od važnijih ciljeva elektroenergetskog sustava visoka je kvaliteta električne energije. Poremećaji u distribucijskom sustavu mogu neželjeno izmijeniti valni oblik napona. Postoji nekoliko metoda kako osigurati visoku kvalitetu energije za osjetljiva trošila. U istraživanju koristimo "dinamičku obnovu napona" za kompenziranje štetnih efekata poremećaja u naponu. Kako energetski sustavi u osnovi imaju složeno dinamičko ponašanje, posebno tijekom kvarova, korišten je vrlo moćan adaptivni regulator: "Hebbov" samopodešavajući regulator sa sposobnošću učenja. Da bi se unaprijedilo vladanje spomenutog regulatora s aspekta indikatora kvalitete energije kao što su parcijalna izbijanja i THD osjetljivog trošila, predložena je nova struktura regulatora s uključenim metodama neizrazite logike. Simulacijski rezultati pokazuju bolji rad sustava uz korištenje predloženog regulatora. Regulator smanjuje propade napona i poboljšava harmonični sastav sustava u kvarnim uvjetima. Rezultati simulacija tako er pokazuju bolje ponašanje u odnosu na uobičajeni PI regulator te konvencionalni Hebbov regulator s učenjem.

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“…However, economical reasons limit the DVR rated power [27]. In this study, a DVR with a 4-MVA converter plus a 1-MVA capacitor filter is used in a 24-MVA wind farm.…”

Section: B Proposed Dvr Operation Philosophymentioning

confidence: 99%

Control Strategy of a DVR to Improve Stability in Wind Farms Using Squirrel-Cage Induction Generators

León

Farias

Battaiotto

et al. 2011

IEEE Trans. Power Syst.

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This work presents a control strategy of a dynamic voltage restorer (DVR) to improve the stability in wind farms based on squirrel-cage induction generators. The DVR controller is tailored to work under unbalanced conditions, which allows overcoming most faults in the power grid. The proposed strategy is capable of balancing voltages at wind farm terminals obtaining several advantages. Firstly, negative-sequence currents are eliminated; thus, overheating, loss of performance, and decreasing of generator useful life are avoided. Secondly, by nullifying negativesequence voltages, 2 pulsation in the mechanical torque is prevented, reducing high stress in the turbine mechanical system, especially in the gearbox. The proposed control strategy for the DVR is compatible with farms which already have installed a static VAR compensator. Several scenarios and disturbances, carefully chosen to provide a realistic assessment, have been tested showing the adequacy of the proposed arrangement and controllers.Index Terms-Dynamic voltage restorer (DVR), fault ride-through capability, grid codes, squirrel-cage induction generators (SCIG), unbalanced conditions, wind energy conversion system (WECS).

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Supervisory control of dynamic voltage restorers

Cited by 42 publications

References 9 publications

Mitigation of Unbalanced Voltage Sag by using Custom Power Devices

Mitigation of Unbalanced Voltage Sag by using Custom Power Devices

Modifying Power Quality's Indices of Load by Presenting an Adaptive Method based on Hebb Learning Algorithm for Controlling DVR

Control Strategy of a DVR to Improve Stability in Wind Farms Using Squirrel-Cage Induction Generators

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