A novel configuration for a Cascade Inverter Based Dynamic Voltage restorer with reduced energy storage requirements

Al-Hadidi, H.K.; Gole, A.M.; Jacobson, David

doi:10.1109/pes.2008.4595979

Cited by 29 publications

(31 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to reduce power exchange during the effective compensation of voltage drop, the compensation strategy of DVR should be optimized [8]. The present research and application of DVR compensation strategies for voltage sag are pre-sag compensation, in-phase compensation and the minimum energy compensation [9][10][11][12]. In-phase compensation method can compensate the sagged voltage with minimum amplitude [9].…”

Section: Introductionmentioning

confidence: 99%

An optimized compensation strategy of DVR for micro-grid voltage sag

Pan

2016

Prot Control Mod Power Syst

View full text Add to dashboard Cite

Introduction: This paper uses a dynamic voltage restorer (DVR) to improve the voltage quality from voltage sags. It is difficult to satisfy various of compensation quality and time of the voltage sag by using single compensation method. Furthermore, high-power consumption of the phase jump compensation increases the size and cost of a dynamic voltage restorer (DVR). Methods & Results:In order to improve the compensating efficiency of DVR, an optimized compensation strategy is proposed for voltage sag of micro-grid caused by interconnection and sensitive loads. The proposed compensation strategy increases the supporting time for long voltage sags. Discussion: Firstly, the power flow and the maximum compensation time of DVR are analyzed using three basic compensation strategies. Then, the phase jump is corrected by pre-sag compensation. And a quadratic transition curve, which involves the injected voltage phases of pre-sag strategy and minimum energy strategy, is used to transform pre-sag compensation to minimum energy compensation of DVR.

show abstract

Section: Introductionmentioning

confidence: 99%

An optimized compensation strategy of DVR for micro-grid voltage sag

Pan

2016

Prot Control Mod Power Syst

View full text Add to dashboard Cite

show abstract

“…There has been improved interest to integrate rechargeable energy storage at the dc-terminal of power quality products like STATCOM and DVR is addressed in [10]. Matrix converter based DVR is given in [11] [12] where there is no requirement of energy storage device for emergency purpose of the grid but it suffers from drawbacks such as high cost, high energy requirement and in [13] H-bridge with cascaded connection in DVR with an inductor controlled by thyristor is introduced to minimize the necessity of energy storage. Ultra-capacitors are best suited for many applications among other energy storage technologies which need active power support in the range of milliseconds to seconds [14] [15].…”

Section: Introductionmentioning

confidence: 99%

Fuzzy Controlled Ultra-Capacitor Based DVR (UCAP-DVR) for Power Quality Enhancement

Bhavani¹,

Prabha²

2016

View full text Add to dashboard Cite

In recent years, a rapid decrease in the cost of various energy storage technologies and their integration into grid becomes a reality with the advent of smart grid. The Dynamic Voltage Restorer (DVR) is a custom power device that has an excellent dynamic capability used to provide voltage sag, swell compensation in distribution systems. Among the energy storage devices, Ultra-Capacitors (UCAP) have ideal characteristics such as high power and low energy density essential for the compensation of voltage sag and swell, which require high power for short interval of time. This paper presents an integration of rechargeable UCAP with DVR. This UCAP-DVR presents a modular, flexible system configuration that will have an active power capability and also provide deep, extended mitigation for power quality problems. The DVR is integrated into UCAP via bidirectional DC-DC converter which supports a rigid dc-link voltage for DVR and also helps in compensating temporary voltage sag and swell. FUZZY LOGIC Controller is used to enhance the performance of UCAP-DVR. The simulation model for the proposed system has been developed in MAT-LAB and the performance over conventional DVR is compared with the results obtained.

show abstract

“…The first group is a conventional DVR with AC/DC/AC converter or DC/AC converter, which requires energy storage elements, such as battery or capacitor banks. These DVRs suffer from disadvantages, such as limited time of compensation, high cost, and bulky energy storage devices [14]- [17]. The second group of DVRs is realized without a DC link using direct AC/AC converters.…”

Section: Introductionmentioning

confidence: 99%

Mitigation of Voltage Sag and Swell Using Direct Converters with Minimum Switch Count

Rahman¹,

Periasamy²,

Arumugam³

2014

Journal of Power Electronics

View full text Add to dashboard Cite

A new simplified topology for a dynamic voltage restorer (DVR) based on direct converter with a reduced number of switches is presented. The direct converter is fabricated using only three bi-directional controlled switches. The direct converter is connected between the grid and center-tapped series transformer. The center-tapped series transformer is used to inject the compensating voltage synthesized by the direct converter. The DVR can properly compensate for long-duration, balanced, and unbalanced voltage sag and swell by taking power from the grid. The switches are driven by ordinary pulse width modulation signals. Simulation and hardware results validate the idea that the proposed topology can mitigate sag of 50% and swell of unlimited quantity.

show abstract

A novel configuration for a Cascade Inverter Based Dynamic Voltage restorer with reduced energy storage requirements

Cited by 29 publications

References 0 publications

An optimized compensation strategy of DVR for micro-grid voltage sag

An optimized compensation strategy of DVR for micro-grid voltage sag

Fuzzy Controlled Ultra-Capacitor Based DVR (UCAP-DVR) for Power Quality Enhancement

Mitigation of Voltage Sag and Swell Using Direct Converters with Minimum Switch Count

Contact Info

Product

Resources

About