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Journal ArticleDOI

Rating and design issues of DVR injection transformer

26 Jan 2010-International Journal of Power Electronics (Inderscience Publishers)-Vol. 2, Iss: 2, pp 143
TL;DR: In this paper, a novel method is proposed to find the voltage rating of the transformer as a function of the fundamental frequency, and the inrush current due to saturation is avoided during transient period.
Abstract: The load side voltage disturbances can be effectively mitigated by connecting a dynamic voltage restorer (DVR), a series compensating device. A DVR is realised by a voltage source inverter with DC storage device and a series injection transformer. Rating and design issues of an injection transformer are of prime concern for the proper voltage compensation using DVR. Voltage underrating of the transformer may lead to its saturation, whereas, overrating increases the cost and size of the DVR. The voltage applied to the primary winding of the transformer is a combination of several components of different frequencies. Considering above aspects, rating and design issues are presented in this paper. A novel method is proposed to find the voltage rating of the transformer as a function of the fundamental frequency. Furthermore, the inrush current due to saturation is avoided during transient period. K factor method is used to account for the effects of current harmonics in the transformer. A PSCAD model is used...
Citations
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Journal ArticleDOI
TL;DR: In this article, the authors provide a comprehensive review on the DVR topologies, control strategies and applications, and some comparative conclusions are also provided for the researchers and engineers, who want to do investigations on DVRs.

123 citations

Journal ArticleDOI
TL;DR: The effectiveness of the DVR using Synchronous reference frame (SRF) control is investigated for FRT capability in DFIG-WT during both balanced and unbalanced fault conditions.
Abstract: Fault ride through (FRT) capability in wind turbines to maintain the grid stability during faults has become mandatory with the increasing grid penetration of wind energy. Doubly fed induction generator based wind turbine (DFIG-WT) is the most popularly utilized type of generator but highly susceptible to the voltage disturbances in grid. Dynamic voltage restorer (DVR) based external FRT capability improvement is considered. Since DVR is capable of providing fast voltage sag mitigation during faults and can maintain the nominal operating conditions for DFIG-WT. The effectiveness of the DVR using Synchronous reference frame (SRF) control is investigated for FRT capability in DFIG-WT during both balanced and unbalanced fault conditions. The operation of DVR is confirmed using time-domain simulation in MATLAB/Simulink using 1.5 MW DFIG-WT.

90 citations


Cites background from "Rating and design issues of DVR inj..."

  • ...Higher rating of the transformer is essential to avoid the risk of high inrush currents and saturation which is discussed in [36,37]....

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Journal ArticleDOI
TL;DR: In this paper, a novel photovoltaic fed Dynamic Voltage Restorer (PV-DVR) is proposed to mitigate deep voltage sags, voltage swells and outages on a low voltage residential distribution system during both daytime and night time.

68 citations

01 Jan 2010
TL;DR: The simulation result s have proved that the proposed adaptive PI controller greatly imp roves the performance of the DVR compared to the conventional PI controller.
Abstract: PI controller is very common in the control of DVR s. However, one disadvantage of this conventional controller is the fact that by using f ixed gains, the controller may not provide the requ ired control performance, when there are variations in t he system parameters or operating conditions. To overcome this problem, an adaptive PI controller us ing fuzzy logic is proposed. The controller is composed of fuzzy controller and PI controller. Acc ording to the error and error rate of the control system and fuzzy control rules, the fuzzy controlle r can online adjust the two parameters of the PI controller in order to be adapted to any variations in the operating conditions. The simulation result s have proved that the proposed control method greatly imp roves the performance of the DVR compared to the conventional PI controller.

40 citations

Journal ArticleDOI
TL;DR: In this paper, a new dynamic voltage restorer (DVR) topology has been proposed, where the capacity of the voltage source inverter and the values of the link filter connected between the injection transformer and the inverter play a crucial role.

25 citations