Hysteresis Voltage Control of DVR Based on Unipolar PWM

Ezoji, Hadi; Sheikhaleslami, Abdol Reza; Shahverdi, Masood; Ghatresamani, Arash; Alborzi, Mohamad Hosein

doi:10.5772/19534

Cited by 8 publications

(2 citation statements)

References 16 publications

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“…The main function of DVR is to mitigate the voltage sag, although sometime additional functions such as harmonics compensation and reactive power compensation are also integrated to the device [27]. It has also been shown in a previous study that the series compensation device such as the DVR [28] is preferred over shunt compensation strategy for stiff systems [29], typical of large industrial load installations.…”

Section: Introductionmentioning

confidence: 91%

A novel voltage mitigation method for high power applications

Darly

Ranjan

Kannan

et al. 2010

Recent Advances in Space Technology Services and Climate Change 2010 (RSTS &Amp; CC-2010)

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In this paper novel voltage mitigation method is introduced to protect sensitive loads due to under voltage or by over current. It will be able to compensate voltage sags on critical loads dynamically. It consists of voltage source inverter, injection transformer, filter and energy storage device. The efficiency of the mitigation method depends on the efficiency of the control techniques involved in switching the inverter. There are many types of control techniques being used for mitigation voltage sags and their capabilities to withstand short duration , shallow sags, in addition to its tolerances to phase jumps , a mitigation technique with low passed , fast response and simple controller could be configured to full fill the voltage restoration requirements. The principle cause of all voltage sags is the short duration increasing current and a mitigation technique is proposed for sag detection and quantification for the sensitive loads which operates at low/high voltage. A different approach has been designed and controls to counter measure voltage disturbances for sensitive loads. The simulation results are presented using the MATLAB simulink toolbox, which shows the closed loop regulator to maintain the load voltage within acceptable levels of voltage variation using transformer coupled H-bridge converters

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Section: Introductionmentioning

confidence: 91%

A novel voltage mitigation method for high power applications

Darly

Ranjan

Kannan

et al. 2010

Recent Advances in Space Technology Services and Climate Change 2010 (RSTS &Amp; CC-2010)

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“…In particular, the difference between reference voltage and incoming voltage supply having power quality problem will transmit as a difference signal to perform the switching in relays for later use in mitigating and compensate the power quality problem incurred in the incoming voltage supply. The hysteresis switching relays will instruct the operation of IGBT switches labeled as D to produce the unipolar SPWM signal from DC supply voltage into AC supply voltage [22]. Lastly, the IGBT switches will inject its converted supply voltage into the system to compensate the voltage sag and swell in the system through the three-phase isolation transformer labeled as E.…”

Section: Figure 1 Basic Principle Of Dynamic Voltage Restorermentioning

confidence: 99%

Energy efficiency enhancement using dynamic voltage restorer (DVR)

Othman¹,

Rakami²,

Hamid³

et al. 2019

IJPEDS

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Dynamic voltage restorer (DVR) is a device that can compensate harmonic, voltage sag and voltage swell condition that exists in a three-phase system. Other than that, DVR can also be used to enhance the energy efficiency or energy saving by reducing excessive amount of incoming power via the reduction incoming voltage at allowable limit. The DVR can inject the required voltage in the system so that the interruption of supply voltage can be compensated. The compensation of voltage supply interruption is improved based on the hysteresis voltage output of controller used in the DVR to detect the difference between reference voltage and disrupted voltage. The hysteresis voltage control mainly controlled by relays switching so that the signal can be sent to IGBT switches controller. The hysteresis voltage control and unipolar SPWM is supplied to control the IGBT switches by the DC supply for voltage interruption compensation. The unipolar SPWM technique converts the DC supply voltage into AC supplied voltage, thus making the DVR injection become easier to inject the AC voltage into the system to compensate voltage sag and voltage swell.

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