Multifunctional Dynamic Voltage Restorer for Power Quality Improvement

Tien, Dung Nguyen; Goňo, Radomír; Leonowicz, Zbigniew

doi:10.20944/preprints201802.0189.v1

Cited by 21 publications

(15 citation statements)

References 3 publications

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“…Power quality is improved using FACTS [6-10] devices like DVR [11][12][13][14][15], DSTATCOM [16][17][18][19][20][21][22], UPQC and many more. UPQC is a combination of back-to-back series-shunt controllers connected with a common DC-Link voltage and combines the performance of DVR and DSTATCOM.…”

Section: Introductionmentioning

confidence: 99%

A multilevel UPQC for voltage and current quality improvement in distribution system

Varampati

Kumar²,

Kota

2019

IJPEDS

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Unified Power Quality Conditioner (UPQC) is substantial power conditioner in power system to filter the power system parameters with an objective to improve the quality of power delivered to the customers/utility point. This paper presents a multi-level UPQC to enhance the quality in power distribution system. The series and shunt controllers of UPQC gives out five leveled output which is further filtered to feed compensating signals to improve voltage and current profiles in power distribution system. Series and shunt controllers of UPQC are structured with cascaded H-Bridge (CHB) topology to deliver compensating signals. Two separate control strategies are employed to regulate the power switches of 5-level CHB series and shunt controllers of UPQC. Sag and swell in source voltage and harmonics in source current are strained with UPQC. The proposed system is developed and results are obtained using MATLAB/SIMULINK software.

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Section: Introductionmentioning

confidence: 99%

A multilevel UPQC for voltage and current quality improvement in distribution system

Varampati

Kumar²,

Kota

2019

IJPEDS

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“…An adaptive threshold for different waveforms was addressed, in which sag depth, mean square error, and entropy of the sag waveform were considered. Because of the effects of voltage sags on power system operation, the dynamic voltage restorer, one of the most effective solutions for mitigating voltage sag in power system, was proposed in [7][8]. Authors in [7] presented a configuration and control strategy for dynamic voltage restorer which used a closed-loop PI control law in the d-q reference frame and a linear Kalman filter was employed to estimate three-phase voltage sag.…”

Section: Introductionmentioning

confidence: 99%

“…Authors in [7] presented a configuration and control strategy for dynamic voltage restorer which used a closed-loop PI control law in the d-q reference frame and a linear Kalman filter was employed to estimate three-phase voltage sag. In [8], a new control method of multifunctional dynamic voltage restorer for voltage quality correction was presented. The control method was designed in the stationary frame by combining proportional resonant controllers and sequence-decouple resonant controllers.…”

Section: Introductionmentioning

confidence: 99%

An Arduino-Based System for Monitoring and Protecting Overvoltage and Undervoltage

Tung

Khoa

2019

Eng. Technol. Appl. Sci. Res.

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In this paper, an experimental system based on Arduino Uno microcontroller board was developed for measuring electrical quantities and protecting overvoltage and undervoltage conditions in a single-phase power supply. The main components are described in detail, including the hardware and software to build the system in which an Arduino Uno platform is implemented as a vital microcontroller to read voltage and current measurement from a voltage sensor (ZMPT101B) and a current sensor (ACS712) respectively. In addition, the Arduino is also used to send all measurement to a PC through a serial port for monitoring the measured data graphically. The proposed method for designing the software uses the root mean square (RMS) method for measuring electrical quantities and then the RMS voltage measurement is compared with the minimum voltage and the maximum voltage to switch on or switch off the load. The monitoring GUI is designed with the use of the free and open-source Telemetry Viewer v0.5 software to monitor RMS voltage, RMS current, active power, and trip signal of the experimental system. The experimental results in this paper demonstrate that the system operated correctly.

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“…This signifies that, in order to solve the unbalanced compensation, some methods add an extra controller in the feedback loop to track this sinusoidal component. Other methods employ complex algorithms to separate the positive-and negativesequence and apply the coordinate transformation in the SRF to both components separately [7], [14], or carry out the transformation in the stationary reference frame [15]. In [16], a state feedback strategy is proposed for balanced voltagesag compensation and a repetitive controller is added to compensate voltage harmonics, as occurs in other methods [17].…”

Section: Introductionmentioning

confidence: 99%

A Discrete-Time Control Method for Fast Transient Voltage-Sag Compensation in DVR

Torres¹,

Roncero‐Sánchez

Vázquez

et al. 2019

IEEE Access

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This paper presents a discrete-time domain control scheme for balanced voltage sag compensation using a Dynamic Voltage Restorer (DVR), which is recognized to be an appropriate and economical power electronic device with which to ameliorate these disturbances. The proposed control method is implemented in the synchronous reference frame (SRF), with two nested regulators, one of which includes an integral action. This algorithm has some advantages with respect to other control algorithms, such as the fact that the proposed methodology permits all the closed-loop poles of the DVR system to be placed in the desired locations in order to define the dynamical behavior with a reduction in the number of the electrical magnitudes to be measured and without the need for state observers, as occurs in traditional control methods. What is more, the well-known inner current loop implemented in other control schemes, which is employed to attenuate the resonance of the plant, is unnecessary. Furthermore, the unbalanced voltage sag compensation can be achieved by adding a ''plug-in'' controller and following the same methodology presented for balanced voltage sags to design the controller. The good performance of the proposed control scheme is validated by means of simulation and experimental results carried out with a 5 kW DVR laboratory prototype. The discrete-time control method is also compared with two control schemes previously proposed in literature.INDEX TERMS Discrete-time systems, dynamic voltage restorer, power quality, power system control, voltage sag.

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Multifunctional Dynamic Voltage Restorer for Power Quality Improvement

Cited by 21 publications

References 3 publications

A multilevel UPQC for voltage and current quality improvement in distribution system

A multilevel UPQC for voltage and current quality improvement in distribution system

An Arduino-Based System for Monitoring and Protecting Overvoltage and Undervoltage

A Discrete-Time Control Method for Fast Transient Voltage-Sag Compensation in DVR

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