scholarly journals Two-Feeder Dynamic Voltage Restorer for Application in Custom Power Parks

Energies ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 3248 ◽  
Author(s):  
Sergio Constantino Yáñez-Campos ◽  
Gustavo Cerda-Villafaña ◽  
Jose Merced Lozano-Garcia
Keyword(s):  
Pulse Width Modulation ◽  
Power Devices ◽  
Dynamic Voltage Restorer ◽  
Voltage Restorer ◽  
Different Types ◽  
The Matrix ◽  
Dynamic Voltage ◽  
Vector Modulation ◽  
Custom Power ◽  
Stable Voltage

The custom power park (CPP) is a concept that has been developed for the purpose of dealing with power quality problems. The CPP is powered by two independent feeders and consists of different types of custom power devices for compensation (dynamic voltage restorer, DVR) and reconfiguration (static transfer switch, STS). Normally, the loads are fed by the preferred feeder (PF) through the STS. When a fault occurs in the PF, the STS performs a reconfiguration of the feeders and feeds the load with an alternate feeder. In this paper, a two-input DVR based on the matrix converter is proposed to provide stable voltage to the load. Each of the DVR inputs is connected to a different feeder, and the PF powers the load. Thus, the DVR has an operational behavior like the STS when reconfiguring the energy transfer of the two feeders and injects it into the PF to guarantee a stable voltage in the load. The control algorithm in the DVR is performed in the dq reference frame to have a unit power factor in feeders and load. The modulation schemes are based on space vector modulation and modified carrier based pulse width modulation. The efficiency and multifunctionality of the proposed DVR is corroborated by simulations on the MATLAB/Simulink.

scholarly journals In Phase Compensation of Sag and Swell Voltage by using Dynamic Voltage Restorer

2019 ◽  
pp. 77-83
Author(s):  
Diksha Wasnik ◽  
Radharaman Shaha
Keyword(s):  
Power Quality ◽  
Storage System ◽  
Electrical Equipment ◽  
Control Technique ◽  
Power Devices ◽  
Phase Compensation ◽  
Dynamic Voltage Restorer ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
Custom Power

Today most of the industries and customers are using sensitive and sophisticated electrical equipment based on semiconductor devices, these may causes power quality disturbance. The major problems are voltage sag and swell. The sag and swell not only occur by disturbed power quality but also due to high system tapping at point of common coupling. To overcome this problem and to improve power quality the distribution companies uses various custom power devices. Among the various custom power devices Dynamic voltage restorer is used for compensation in this paper, which is most popular and widely used method. Here, In phase compensation technique of DVR is used with battery energy storage system. The voltage at PCC have been observed. The control technique employed here is SRF theory with PI controller. The overall work is carried out in MATLAB Simulink.

scholarly journals Voltage disturbance mitigation in Iraq's low voltage distribution system

2020 ◽  
Vol 17 (1) ◽  
pp. 47
Author(s):  
Jamal Abdul-Kareem Mohammed ◽  
Arkan Ahmed Hussein ◽  
Sahar R. Al-Sakini
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Pulse Width Modulation ◽  
Low Voltage ◽  
Distribution Network ◽  
Voltage Source ◽  
Power Distribution Network ◽  
Dynamic Voltage Restorer ◽  
Voltage Restorer ◽  
Dynamic Voltage

<p>Power distribution network in Iraq still suffers from significant problems regarding electricity distribution level. The most important problem is the disturbances that are occurring on lines voltages, which in turn, will negatively affect sensitive loads they feed on. Protection of these loads could be achieved efficiently and economically using the dynamic voltage restorer DVR when installed between the voltage source and load to inject required compensation voltage to the network during the disturbances period. The DVR mitigates these disturbances via restoring the load voltage to a pre-fault value within a few milliseconds. To control the DVR work, dq0 transformation concept and PID method with sinusoidal pulse-width modulation SPWM based converter had been used to correct the disturbances and thus enhance the power quality of the distribution network. The DVR performance was tested by MATLAB/Simulink with all kinds of expected voltage disturbances and results investigated the effectiveness of the proposed method.</p>

scholarly journals ANALISIS KOMPENSASI TEGANGAN SAG DENGAN KONTROL HYSTERESIS DAN ANN PADA GI SENGKALING PENYULANG PUJON

Transmisi ◽  
2020 ◽  
Vol 22 (3) ◽  
pp. 73-79
Author(s):  
Arief Trisno Eko Suryo ◽  
Wijono Wijono ◽  
Bambang Siswojo
Keyword(s):  
Power Device ◽  
Dynamic Voltage Restorer ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
Custom Power

Makalah ini mendiskusikan tentang analisis kompensasi tegangan sag. Tegangan sag disebabkan oleh gangguan hubung singkat 3 fasa ke tanah. Gangguan tersebut memiliki dampak besar terhadap kerusakan pada saluran beban Penyulang Pujon. Tegangan sag dapat diatasi dengan kompensasi menggunakan Dynamic Voltage Restorer (DVR), yang mana DVR merupakan salah satu dari custom power device yang paling efektif. Hysteresis dan ANN diusulkan untuk mengatur kompensasi tegangan sag dari DVR. Hasil simulasi menunjukkan bahwa kontrol Hysteresis mampu mengkompensasi tegangan beban rata-rata sebesar 95.9 %, dan ANN 104.3%. Kontrol Hysteresis lebih baik dibandingkan dengan kontrol ANN dalam mengkompensasi tegangan beban, yang mana tidak melebihi tegangan beban normal pada saat kompensasi tegangan sag.

A Matrix Converter for Compensating Unbalanced and Harmonic Input Voltages

2012 ◽  
Vol 13 (1) ◽  
Author(s):  
Jose M. Lozano ◽  
Juan M. Ramirez
Keyword(s):  
Power Quality ◽  
Distribution Systems ◽  
Harmonic Distortion ◽  
Matrix Converter ◽  
Space Vector Modulation ◽  
Dynamic Voltage Restorer ◽  
Voltage Restorer ◽  
Svm Algorithm ◽  
Dynamic Voltage ◽  
Vector Modulation

A dynamic voltage restorer (DVR) based on an AC-AC converter is presented. It is able to compensate different common disturbances in distribution systems, with the purpose of improving the power quality delivered to the users. A prototype has been assembled to test the feasibility of the proposition. In this paper a modulation strategy based on the well known space vector modulation (SVM) algorithm is presented in order to synthesize controllable voltages in magnitude and waveform for compensation purposes. Unbalanced and harmonic distortion conditions in the supply voltages are taken into account. These results positively confirm the design, simulation, assembling, and expectations about the device.

Comparison of control methods for a dynamic voltage restorer using a three-phase matrix converter

SIMULATION ◽  
2016 ◽  
Vol 92 (12) ◽  
pp. 1053-1063 ◽  
Author(s):  
Paweł Szcześniak
Keyword(s):  
Energy Storage ◽  
Distribution System ◽  
Complex Structure ◽  
Matrix Converter ◽  
Control Methods ◽  
Dynamic Voltage Restorer ◽  
Power Distribution System ◽  
Voltage Restorer ◽  
The Matrix ◽  
Dynamic Voltage

A dynamic voltage restorer (DVR) is used in a power distribution system to protect sensitive loads against voltage disturbances. The commonly used DVR system contains a converter with direct current (DC) link and energy storage elements. The DC energy storage part of the system is the most expensive element and has a large value. As an alternative, therefore, DVR systems can use alternating current AC/AC converters without DC energy storage. This paper presents the properties of a DVR system based on a direct matrix converter using three control methods: in-phase, pre-sag, and energy-optimal. The paper defines basic mathematical relationships and static characteristics and describes the range of voltage compensation by use of the described compensation methods. Simulation results are obtained and presented in order to verify the correctness of the compensation. The features of such a DVR system configuration are considered in the context of alternative applications for commonly used converters with DC-link energy storage power converters. Application of the matrix converter in electrical power systems is still not very popular, due to limited output voltage and the complex structure and process control. This article is an attempt to show the usefulness of the matrix converter in spite of its limitations and the complexity of the design.

scholarly journals A Fast and Accurate Method for Power System Voltage Sag Detection

2020 ◽  
Vol 16 (1) ◽  
pp. 78-84
Author(s):  
Adnan Diwan ◽  
Khalid Abdulhassan ◽  
Falih Alnahwi
Keyword(s):  
Accurate Method ◽  
Voltage Sag ◽  
Dynamic Voltage Restorer ◽  
Detection Techniques ◽  
Voltage Restorer ◽  
Detection Circuit ◽  
Different Types ◽  
Voltage Sag Detection ◽  
Dynamic Voltage ◽  
Speed And Accuracy

In order to mitigate the effect of voltage sag on sensitive loads, a dynamic voltage restorer (DVR) should be used for this purpose. The DVR should be accompanied with a fast and accurate sag detection circuit or algorithm to determine the sag information as quickly as possible with an acceptable precision. This paper presents the numerical matrix method as a distinctive candidate for voltage sag detection. The design steps of this method are demonstrated in detail in this work. The simulation results exhibit the superiority of this technique over the other detection techniques in term of the speed and accuracy of detection, simplicity in implementation, and the memory size. The results also accentuate the recognition capability of the proposed method in distinguishing different types of voltage sag by testing three different voltage sag scenarios.

scholarly journals Hardware realization of DVR with 27 level multi carrier PWM based MLI

2018 ◽  
Vol 7 (3.29) ◽  
pp. 26
Author(s):  
M Maheswari ◽  
S Thangavel
Keyword(s):  
Pulse Width Modulation ◽  
Electrical Power ◽  
Dynamic Voltage Restorer ◽  
Industrial Sectors ◽  
Proposed Model ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
Voltage Swells ◽  
Simulation Results ◽  
Cascaded Multilevel Inverter

The quality of the electrical power delivered to consumers is heavily affected by the power electronics based controllers, introduced in both domestic and industrial sectors, which in turn results in malfunctioning of equipment or eventual damage. Series compensators, Shunt compensators and series-shunt compensators are some of the strategies applied to address the power quality issues effectively. In this work a series compensating device, viz. 27 level-cascaded multilevel inverter based Dynamic Voltage Restorer (DVR) with multicarrier SPWM technique is proposed to mitigate voltage swells and voltage sags. The PWM technique used in this work is Alternate Phase Opposition PWM (APODPWM), which is one of the vertical arrangement multicarrier sinusoidal pulse width modulation techniques, to control the cascaded H-bridge inverter. The single-phase version of the proposed system is simulated to verify the effectiveness in addressing voltage issues and it is found that the obtained simulation results are satisfactory. The THD is found to be 3.40%, which is well below IEEE standards apart from considerable improvement in response time. The prototype of the proposed model is developed and the pic-microcontroller PIC16F887 is employed to implement the APODPWM. The experimental results obtained from the prototype are compared with the respective simulation results and they match with reasonable accuracy.  

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