Control strategies for dynamic voltage restorer compensating voltage sags with phase jump

Nielsen, J.G.; Blaabjerg, Frede; Mohan, Ned

doi:10.1109/apec.2001.912528

Cited by 196 publications

(98 citation statements)

References 4 publications

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“…Generally, there are two control schemes, open loop (Niesen et al, 2001) and closed loop (Vilathgamuwa et al, 2002), which are used in the DVR applications. This study presents an extensive analysis to develop suitable control strategies for the DVRs .…”

Section: Proposed Methods Of Control System Developmentmentioning

confidence: 99%

New control technique applied in dynamic voltage restorer for voltage sag mitigation

Omar

Rahim

2009

2009 4th IEEE Conference on Industrial Electronics and Applications

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Abstract:The Dynamic Voltage Restorer (DVR) was a power electronics device that was able to compensate voltage sags on critical loads dynamically. The DVR consists of VSC, injection transformers, passive filters and energy storage (lead acid battery). By injecting an appropriate voltage, the DVR restores a voltage waveform and ensures constant load voltage. There were so many types of the control techniques being used in DVR for mitigating voltage sags. The efficiency of the DVR depends on the efficiency of the control technique involved in switching the inverter. Problem statement: Simulation and experimental investigation toward new algorithms development based on SVPWM. Understanding the nature of DVR and performance comparisons between the various controller technologies available. The proposed controller using space vector modulation techniques obtain higher amplitude modulation indexes if compared with conventional SPWM techniques. Moreover, space vector modulation techniques can be easily implemented using digital processors. Space vector PWM can produce about 15% higher output voltage than standard Sinusoidal PWM. Approach: The purpose of this research was to study the implementation of SVPWM in DVR. The proposed control algorithm was investigated through computer simulation by using PSCAD/EMTDC software. Results: From simulation and experimental results showed the effectiveness and efficiency of the proposed controller based on SVPWM in mitigating voltage sags in low voltage distribution systems. It was concluded that its controller also works well both in balance and unbalance conditions of voltages. Conclusion/Recommendations: The simulation and experimental results of a DVR using PSCAD/EMTDC software based on SVPWM technique showed clearly the performance of the DVR in mitigating voltage sags. The DVR operates without any difficulties to inject the appropriate voltage component to correct rapidly any anomaly in the supply voltage to keep the load voltage balanced and constant at the nominal value.

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Section: Proposed Methods Of Control System Developmentmentioning

confidence: 99%

New control technique applied in dynamic voltage restorer for voltage sag mitigation

Omar

Rahim

2009

2009 4th IEEE Conference on Industrial Electronics and Applications

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“…Linear control methods can be employed with the feedback, the feed-foreword and the combined feed controllers. Non-Linear control methods comprising the Artificial Neural Networks (ANN), the Fuzzy Logic (FL) and the Space Vector (SV) controllers Although feedback controllers are popular, they require load and source tracking, whereas feed-foreword controllers are much simpler yet open-looped, there is no feedback from the load voltage or current [22][23][24].…”

Section: Control Methods For Dvrmentioning

confidence: 99%

“…In this method jumps in the phase angle is not compensated [23,24]. The vector diagram corresponding to In Phase Compensation method is shown in Fig 4b. Here, the pre-fault voltage is 1 p.u.…”

Section: In Phase Compensationmentioning

confidence: 99%

A Fuzzy Logic based Dynamic Voltage Restorer for Voltage Sag and Swell Mitigation for Industrial Induction Motor Loads

Azim¹,

Hoque²

2011

IJCA

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Power quality has been an issue that is becoming increasingly pivotal in industrial electricity consumers point of view in recent times. Modern industries employ Sensitive power electronic equipments, control devices and non-linear loads as part of automated processes to increase energy efficiency and productivity. Voltage disturbances are the most common power quality problem due to this increased use of a large numbers of sophisticated and sensitive electronic equipment in industrial systems. The Dynamic Voltage Restorer (DVR) has recently been introduced to protect the sensitive industrial loads from the detrimental effects of voltage sags/swells and other voltage disturbances. Configurations and control schemes for the DVR varies depending upon the nature and characteristics of the load to be protected. Industries with induction motors loads require a complete different approach for the design and control of a suitable DVR owing to the inherit inertia of the induction motors and their capability to withstand short-duration, shallow sags/swells, in addition to its tolerance to phase angle jumps. In this paper, a DVR with fast response, simple and efficient controller is proposed for fulfilling the voltage restoration requirements for industrial induction motor loads. The proposed DVR employs the classical Fourier Transform (FT) for sag/swell detection and quantification and a Fuzzy Logic based feedback controller which utilizes the error signal (difference between the reference voltage and actual measured load voltage) to control the triggering of the switches of an inverter using a Sinusoidal Pulse Width Modulation (SPWM) scheme. The proposed DVR utilizes the energy from available supply line feeders through a rectifier to feed the inverter. Modeling and simulation of the proposed DVR is implemented in MATLAB/SIMULINK platform. Simulation results have shown that the proposed DVR was efficient in mitigating balanced, unbalanced, multistage and consecutive sags, as well as swells.

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“…Open loop control is used for DVR in [10].Different control methods to compensate voltage sags with phase jump are proposed and compared here. But the disadvantage of open loop control strategy used in DVR to regulate load voltage can produce poorly damped response due to the presence of switching harmonic filter in the restorer [11].…”

Section: Review Of Proposed Control Schemes For Dynamic Voltage mentioning

confidence: 99%

Dynamic Voltage Restorer and Review of Control Schemes Proposed For Dynamic Voltate Restorer

Patil¹

2014

IOSRJEEE

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Control strategies for dynamic voltage restorer compensating voltage sags with phase jump

Cited by 196 publications

References 4 publications

New control technique applied in dynamic voltage restorer for voltage sag mitigation

New control technique applied in dynamic voltage restorer for voltage sag mitigation

A Fuzzy Logic based Dynamic Voltage Restorer for Voltage Sag and Swell Mitigation for Industrial Induction Motor Loads

Dynamic Voltage Restorer and Review of Control Schemes Proposed For Dynamic Voltate Restorer

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