Research on Low voltage ride through Control Technology Based on Dynamic Voltage Restorer

2020 ◽  
Author(s):  
Jingyun Zhang ◽  
Yonghong Huang
Keyword(s):  
Low Voltage ◽  
Control Technology ◽  
Dynamic Voltage Restorer ◽  
Low Voltage Ride Through ◽  
Voltage Restorer ◽  
Dynamic Voltage

scholarly journals Application of Dynamic Voltage Restorer for Enhancing low voltage Ride-through capability of Doubly Fed Induction Generator

2020 ◽  
Vol 10 (1) ◽  
pp. 32-35
Keyword(s):  
Low Voltage ◽  
Energy System ◽  
Induction Generator ◽  
Doubly Fed Induction Generator ◽  
Dynamic Voltage Restorer ◽  
Low Voltage Ride Through ◽  
Voltage Restorer ◽  
Wind Energy System ◽  
Dynamic Voltage ◽  
Doubly Fed

Doubly Fed Induction Generator (DFIG) based wind Energy System are very sensitive to grid disturbance such as Symmetrical voltage sag. In this paper the authors propose a new method for application of Dynamic Voltage Restorer for enhancing the low voltage ride through capability of wind turbine driven Doubly Fed Induction Generator.

scholarly journals Enhancing Doubly Fed Induction Generator Low-Voltage Ride-Through Capability Using Dynamic Voltage Restorer with Adaptive Noise Cancellation Technique

2022 ◽  
Vol 14 (2) ◽  
pp. 859
Author(s):  
Mohamed Adel Ahmed ◽  
Tarek Kandil ◽  
Emad M. Ahmed
Keyword(s):  
Low Voltage ◽  
Operating Conditions ◽  
System Stability ◽  
Dynamic Voltage Restorer ◽  
Low Voltage Ride Through ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
Utility Grid ◽  
Adaptive Noise ◽  
Doubly Fed

Some of the major challenges facing micro-grids (MGs) during their connection with the utility grid are maintaining power system stability and reliability. One term that is frequently discussed in literature is the low-voltage ride-through (LVRT) capability, as it is required by the utility grid to maintain its proper operation and system stability. Furthermore, due to their inherent advantages, doubly fed induction generators (DFIGs) have been widely installed on many wind farms. However, grid voltage dips and distortion have a negative impact on the operation of the DFIG. A dynamic voltage restorer (DVR) is a commonly used device that can enhance the LVRT capability of DFIG compared to shunt capacitors and static synchronous compensator (STATCOM). DVR implements a series compensation during fault conditions by injecting the proper voltage at the point of common coupling (PCC) in order to preserve stable terminal voltage. In this paper, we propose a DVR control method based on the adaptive noise cancelation (ANC) technique to compensate for both voltage variation and harmonic mitigation at DFIG terminals. Additionally, we propose an online control of the DC side voltage of the DVR using pulse width modulation (PWM) rectifier to reduce both the size of the storage element and the solid-state switches of the DVR, aiming to reduce its overall cost. A thorough analysis of the operation and response of the proposed DVR is performed using MATLAB/SIMULINK under different operating conditions of the grid. The simulation results verify the superiority and robustness of the proposed technique to enhance the LVRT capability of the DFIG during system transients and faults.

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>

Efficient Approach to LVRT Capability of DFIG-Based Wind Turbines under Symmetrical and Asymmetrical Voltage Dips Using Dynamic Voltage Restorer

2017 ◽  
Vol 8 (2) ◽  
pp. 945 ◽  
Author(s):  
Kiarash Azizi ◽  
Murtaza Farsadi ◽  
Mohammad Farhadi Kangarlu
Keyword(s):  
Wind Turbines ◽  
Low Voltage ◽  
Normal Operation ◽  
Dynamic Voltage Restorer ◽  
Volume Weight ◽  
Voltage Restorer ◽  
Voltage Dips ◽  
Dynamic Voltage ◽  
In Series ◽  
Grid Side

<span>The capability of low-voltage ride-through (LVRT) of doubly fed induction generator (DFIG) has been considered as an essence for grid code requirements. Any unbalance on the grid side causes the rotor current of the generator to rise which leads to saturate the dc-link of the back-to-back converter or even destroy it. To meet this requirement, a dynamic voltage restorer (DVR) without dc-link energy storage elements is utilized to compensate any disturbance imposed to the DFIG wind turbine system. On the time of any disturbance or fault, DFIG and DVR are properly controlled in order to compensate the specified faulty phase uninterruptedly. DVR is connected in series to the grid and by injecting instantaneous compensating voltage, prevents the stator voltage from rapid changing; consequently, the rotor side converter can accomplish its normal operation. As voltage dips are the most common grid faults subjected to DFIGs, this paper investigates both symmetrical and asymmetrical voltage dips caused by grid faults. The independent and instantaneous phase voltage compensation, less volume, weight, and cost are the merits to utilize the proposed DVR along with DFIG wind turbines. PSCAD/EMTDC based simulations verifies the capabilities of the proposed technique for the LVRT capability of DFIG.</span>

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