The answer to this dilemma is the dynamic voltage restorer, or dvr. In this paper, dvr is used to control voltage sag as its main objective and to reduce total harmonic distortion thd. The dynamic voltage restorer dvr is a rapid, flexible and resourceful solution to power quality problems. Control and testing of a dynamic voltage restorer dvr ieee xplore. Figure 4 dynamic voltage restorer simulation of phase locked loop as mentioned in block diagram of dvr. It effectively acts as a buffer to the load and prevents unacceptable disturbances. Voltage quality improvement using dynamic voltage restorer ijedr1401068 international journal of engineering development and research. Mitigation of voltage sag, swell and harmonics by dynamic. The operating principle for the dvr is illustrated in fig.
One such reliable customer power device used to address the voltage sag, swell problem is the dynamic voltage restorer dvr. Figure 3 shows the location of dynamic voltage restorer dvr in an electrical power system. In many countries, the effects of lack of power quality have been resulting in wastage of several billions of dollars every year. The main function of dvr is to mitigate the problems of voltage sag and voltage swells. Abstractdynamic voltage restorers dvrs are used to protect sensitive loads from the effects of voltage sags on the distribution feeder. Interline dynamic voltage restoration for power quality.
Mitigation of voltage sag and swell using dynamic voltage. Dynamic voltage restorer dvr is one of the most effective custom power devices which have been popular for the protection of sensitive loads from voltage. Dynamic voltage restorer dvr dvr is voltage source converter it injects the controlled voltage in series with the grid voltage by using series injection transformer. Keywords dynamic voltage restorer, flywheel energy storage, indirect matrix converter, vector control, voltage. It is a series compensation device, which protects sensitive electric load from power quality problems such as voltage sags, swells, unbalance and distortion through power electronic controllers that use voltage source converters vsc. Khadem c, soydan redif b, malabika basu a a school of. Abstractthe dynamic voltage restorer dvr as a means of series compensation for mitigating the effect of voltage sags has become established as a. Dvr maintains the load voltage at a nominal magnitude and phase by compensating. They employ a series of voltage boost technology using solid state switches for compensating voltage sagsswells. Dynamicvoltage restorer a dynamic voltage restorer dvr is a recently proposed series connected solid state device that injects voltage into the system in order to regulate the load side voltage. It injects a voltage on the system to compensate any disturbance affecting the load voltage. Effective control strategy to enhance power quality. Abstractpower quality has become the major area of concern at present due to the increase in modern and. Dvr dynamic voltage restorer is a static var device that has seen applications in a variety of transmission and distribution systems.
Mitigation of voltage sag by using dynamic voltage restorer. The dynamic voltage restorer dvr is a power electronic device that is used to inject 3phase voltage in series and in synchronism with the distribution f. Eee, thejus engineering college, erumappetty, thrissur, kerala 680584. These are a problem because spikes consume power and sags reduce efficiency of some devices. By proper tuning of the controller required voltage to mitigate the voltage sag for few cycle is injected through. Unloading large inductive loads and energizing large capacitor banks are the possible reasons of the voltage s well 1. Pdf transformerless dynamic voltage restorer for voltage. Simulink model of dynamic voltage restorer figure 4 shows the diagram for the system under fault condition using dvr. Mitigation of voltage sagswell using dynamic voltage restorer dvr sanjay haribhai chaudhary, mr. In the event of a voltage dip, the power electronic converter injects the appropriate voltage required into the supply bus to compensate for the sag.
Power quality improvement using a dvr dynamic voltage. While the dynamic voltage restorer is good there are some disadvantages. Voltage quality improvement using dynamic voltage restorer. It is a series connected custom power device, which is considered to be a cost effective alternative when compared with other commercially available voltage sag. A dvr will instantly catch and compensate voltage sags, so they wont even be noticed. The dvr is a series compensator used to mitigate voltage sags and to restore load voltage to its rated value. The dvr is a series compensator used to mitigate voltage sags and to restore load voltage.
Modeling and simulation of a dynamic voltage restorer dvr. It ensures regulated voltage supply to the sensitive loads, even in case of voltage sag and swell disturbances in the distribution network. Power quality devices improve manufacturing process stability. Index termsdynamic voltage restorer, interline dynamic voltage restorer, current source inverter, smes and power quality. Restorer dvr is a custom power quality device used for mitigation of voltage sag by injecting voltage as well as power into the system. Dynamic voltage restorer dvr has become popular as a costef fective solution for the protection of sensitive loads from voltage sag and voltage swell. Dynamic voltage restorer dvr is a custom power device used in electrical distribution system for power quality improvement. Design of three phase dynamic voltage restorer to mitigate. A basic block diagram for open loop dvr is shown in fig 1. Power quality problem is an occurrence manifested as a nonstandard voltage, current or frequency. It is a series connected device and compensates voltage. These include its size and shape, the possibility of interference, and it is fixed and cannot be adjusted. Offers highquality power is also a mark of national industrial, technological level and progress of social civilization. Mitigation of voltage sagswell by dynamic voltage restorer.
Aug 21, 2014 the proposed strategy is to use dynamic voltage controller dvr to compensate the voltage disturbance. Distribution static compensator dstatcom and dynamic voltage restorer dvr been recently used for voltage sagswell compensation. Design and control of singlephase dynamic voltage restorer. Dvrs are a class of custom power devices for providing reliable distribution power quality. Dynamic voltage restorer dvr system for compensation of. Control of the dynamic voltage restorer to improve voltage quality samet biricik a,b, shafiuzzaman k. Dynamic voltage restorer for voltage compensation and fault current limiting functions nikhy p c, mtech scholar and anil antony p, asst. Dvrs are a class of custom power devices for improvement in power quality. Control strategies for dynamic voltage restorer compensating voltage sags with phase jump. The advent of voltage sourced converter technology has enabled another buffering technique to be applied, which avoids the disadvantages of series capacitors and does not rely on local generation being present, the dynamic voltage restorer dvr, figure 41.
Voltage sag is the most frequently happening problem on power system and might cause great economic loss. In this paper, a conventional dvr design essentially contains a voltage source inverter vsi, an injection. The fast developments in power electronic technology have made it possible to mitigate voltage disturbances in power system. It is the best solution to obtain the same load voltage as the prefault voltage and is best suited for loads sensitive to phase angle jumps like angletriggered thyristorscontrolled loads. This is where dvr dynamic voltage restorer comes in. The dynamic voltage restorer dvr is fast, flexible and efficient solution to voltage sag problem. The most noticeable topic for electrical engineering is power quality in recent year. Power supplies ups, dynamic voltage restorers dvr and active power filters. In this paper, a transformerless dynamic voltage restorer dvr based on the two levelthree phase inverter is proposed.
Dynamic voltage restorer is a power electronic device that can protect sensitive loads from various disturbances in the power supply. This work shows the hardware implementation of three phase dvr to mitigate voltage sag for balanced three phase system. A dynamic voltage restorer is basically controlled voltage source converter that is connected in series with the network. Pdf dynamic voltage restorer dvr system for compensation of. The device consists of dcac converter connected in the open neutralpoint of a distribution transformer. The feasibility of achieving dynamic voltage restoration without the use of the injection transformer is investigated.
For improving power quality as a cost effective solution for the protection of sensitive loads from voltage disturbances a dynamic voltage restorer dvr has great. The dvr is a series compensator used to mitigate voltage sags. To solve this problem, dynamic voltage restorer dvr is the most efficient and economic device at present. Voltage deviations, often in the form of voltage sags, can cause severe process disruptions and result in substantial economic loss. The numerical simulation results and experimental results from a laboratoryscale hardware prototype are presented to verify system performance. The scheme proposed utilizes an errordriven proportionalintegralderivative pid controller to guarantee better. This paper presents a novel contribution of a low complexity control scheme for voltage control of a dynamic voltage restorer dvr. Mitigation of voltage quality problem using dynamic voltage restorer dvr comparison between anfis, pi and fis ramadan salem ramadan ali 1 and muhammad nizam corresponding author. Dynamic voltage restorer for voltage compensation and. The load point voltage and the reference voltage are first converted to the dq0 reference frame. The dvr is a power quality device, which can protect these industries against the bulk of these disturbances, i. Dynamic voltage restorer can provide the most cost effective solution to mitigate voltage sags and swells that is required by customer. Voltage sag detection technique for a dynamic voltage restorer. May 02, 2018 this entry was posted in blog, website and tagged a superconducting magnetic energy storage emulatorbattery supported dynamic voltage restorer, battery, dynamic voltage restorer dvr, energy storage integration, sag, superconducting, superconducting magnetic energy, superconducting magnetic energy storage system.
The magnitudes of dvr injected voltages are controlled in such so as to regulate the loadside voltage. It is designed to deal with voltage dips of up to 50 %. Voltage sags and swells voltage sag is defined as decrease in rms voltage or current to values to between 0. Voltage stability can be achieved by the use of advanced power electronic device such as dynamic voltage restorer dvr. The voltage dips due to symmetrical and unsymmetrical faults are considered for analysis. The dynamic voltage restorer dvr has been proposed to protect sensitive loads from such voltage sags. In this project dvr is proposed which can protect the endconsumer load from any unbalance of voltage. The dvr control circuit in this paper is a combination of pwmbased technology, dq0 conversion and pi controller. The use of a dynamic voltage restorer dvr known as voltage sag compensator, is one of the most effective. The dynamic voltage restorer dvr detects and compensates for sags in the voltage of the ac power source so that the loads are insulated from these power reliability issues. Jul 26, 2014 among the voltage disturbances challenging the industry, the voltage sags are considered the most important problem to the sensitive loads. The dvr is a power electronic based device that provides threephase controllable voltage source. This paper proposes a new concept of interline dynamic voltage restoration idvr where two or more dvrs in different feeders are connected to a common dc link. Pdf dynamic voltage restorer dvr for voltage sag mitigation.
Improved and controlled power quality is one of the essential and fundamental need in any power driven industry for optimum utilization of resources. Dynamic voltage restorer dvr dvr is a series connected solid state device that is used for mitigating voltage disturbances in the distribution system by injecting voltage into the system in order to regulate the load side voltage 9. Presag compensation dynamic voltage restorer dvr for voltage sag mitigation. Voltage sagswell compensation using dynamic voltage. Modeling and simulation for voltage sagsswells mitigation using dynamic voltage restorer dvr by p. The system consists of voltage of 1 pu, 50 hz source with 10kw 3phase rlc load shown in fig 5. Improving low voltage ride through capability of wind. However critical problems in power quality have been recognized such as sags, swells, harmonic. A superconducting magnetic energy storage emulatorbattery. Mithulananthan simple design criteria of injection transformer for the dynamic voltage restorer.
Electric power components and systems, 4314, 15961609. Operation and control of a dynamic voltage restorer using. Simple design criteria of injection transformer for the. In this paper, dvr is used to control voltage sag as its main objective and to.
Installation of injection transformer in power distribution system. This option is reasonable because for a typical distribution. Pdf an improved approach for robust control of dynamic. Abb integrated gate commutated thyristor igct technology makes such devices possible and gives them their. Dynamic voltage restorer utilizing a matrix converter and. Dynamic voltage restoration dvr is a method of overcoming voltage sags and swells that occur in electrical power distribution. The dvr provides the wind generator the ability to remain connected in grid and improve the reliability. They employ a series of voltage boost technology using solid state switches for compensating voltage. Despite the local nature of the cause, voltage dips and sags can be felt hundreds of kilometers away. Operation and control of a dynamic voltage restorer using transformer coupled hbridge converters bingsen wang, student member, ieee, giri venkataramanan, member, ieee, and mahesh illindala, member, ieee abstractthe dynamic voltage restorer dvr as a means of series compensation for mitigating the effect of voltage sags has. Phase advanced dynamic voltage restorer control system design. Pdf the dynamic voltage restorer dvr is fast, flexible and efficient solution to voltage sag problem. Pdf control of the dynamic voltage restorer to improve voltage.
The dvr consists of dc power sources, an igbt converter, and an injection transformer which is connected in series with the power line and the sensitive. Dynamic voltage restorer dvr is a series connected power electronic based device that can quickly mitigate the voltage sags in the system and restore the load voltage to the prefault value. Dynamic voltage restorer dvr is the mostly used custom power device for improving power quality indices. This research introduced dynamic voltage restorer dvr and its voltage compensation methods. Dynamic voltage restorer for voltage compensation and fault. Even a relatively modest reduction in voltage of, say, down to 70 per cent of nominal in one phase, may trip entire paper machines. Another power electronic solution to the voltage regulation is the use of a dynamic voltage restorer dvr. Index terms dynamic voltage restorer, interline dynamic voltage restorer, current source inverter, smes and power quality. Control of a dynamic voltage restorer to compensate single. This entry was posted in blog, website and tagged a superconducting magnetic energy storage emulatorbattery supported dynamic voltage restorer, battery, dynamic voltage restorer dvr, energy storage integration, sag, superconducting, superconducting magnetic energy, superconducting magnetic energy storage system. The double synchronous reference frame phaselocked loop dsrfpll is applied for the voltage sag detection, which is able to calculate the phase angle of the positivesequence fundamental component.
Research and design of dynamic voltage restorer ieee. Mitigation of voltage sag and swell using dynamic voltage restorer abstract. To overcome power quality problems like voltage sag and voltage swell the. The basic principle of the dynamic voltage restorer is to inject a voltage of required magnitude and frequency, so that it can restore the load side voltage to the desired amplitude and waveform even when the source voltage is unbalanced or distorted. The dvr is a power electronic based device that provides threephase controllable voltage source, whose voltage vector magnitude and angle adds to the source voltage during sag event, to restore the load voltage to presag conditions. One of those devices is the dynamic voltage restorer dvr. Modeling and simulation of dynamic voltage restorer dvr for voltage sag mitigation outline by syed khundmir t department of electrical engineering university at buffalo email.
Generally, it employs a gate turn off thyristor gto. Effective controller design for the dynamic voltage. International journal on electrical engineering and informatics. A superconducting magnetic energy storage emulator.
A dynamic voltage restorer is a power quality custom power device used to correct the voltage disturbances by injecting voltage as well as power into the system. Pdf dynamic voltage restorer against voltage sag semantic. This method uses real power in order to inject the faulted supply voltages and is commonly known as the dynamic voltage restorer. Elshennawy3 1dean of the faculty of engineering, pharos university in alexandria, egypt 2electrical engineering dept. Abb recently installed two dvrs which, rated at an impressive 22. To simulate dynamic voltage restorer with the help of matlab simulink and implement in the hardware. Dvr saves energy through voltage injections that can affect the phase and waveshape of the power being supplied. The dynamic voltage restorer dvr tm is an example, with module ratings of 2 mva or 5 mva. Dynamic voltage restorer dvr for voltage sag mitigation. Design and control of singlephase dynamic voltage restorer indian. Dynamic voltage restorer for voltage sag compensation ieee. Inorder to overcome this situation, a dynamic voltage restorer is connected in series to the system.
Dynamic voltage restorer dvr power quality in electrical. Simulation of dynamic voltage restorer using matlab to. The voltage sag detection algorithm and control algorithm synthesis of the dynamic voltage restorer dvr are proposed. Jan 30, 2020 an interline dynamic voltage restorer idvr is a novel c o m p e n s a t i o n piece of mitigation it is made of several dynamic voltage restorers dvrs with a. Abstractthe dynamic voltage restorer dvr has become pop ular as a cost effective solution for the protection of sensitive loads from voltage sags. Dynamic voltage restorer an overview sciencedirect topics. A multifunctional dynamic voltage restorer for power. It is a series connected custom power device, which is considered to be cost effective compared to other alternative voltage sag compensation devices. Mitigation of voltage sagswell using dynamic voltage.
94 1379 16 1532 1558 1611 663 1352 47 834 998 581 485 1164 1547 740 120 302 1608 363 897 148 77 468 201 6 480 349 676 1418 892 896 1172 439 1526 1129 1189 1215 1365 545 208 1040 1181 1211 1320 1212 848