scholarly journals Improving Low Voltage Ride Through Capability of Wind Generators Using Dynamic Voltage Restorer

2014 ◽  
Vol 65 (4) ◽  
pp. 235-241 ◽  
Author(s):  
Gangatharan Sivasankar ◽  
Velu Suresh Kumar
Keyword(s):  
Wind Power ◽  
Wind Farm ◽  
Low Voltage ◽  
Stable Operation ◽  
Dynamic Voltage Restorer ◽  
Wind Power Integration ◽  
Wind Generators ◽  
Voltage Dip ◽  
Voltage Controller ◽  
Dynamic Voltage

Abstract The increasing wind power integration with power grid has forced the situation to improve the reliability of wind generators for stable operation. One important problem with induction generator based wind farm is its low ride through capability to the grid voltage disturbance. Any disturbance such as voltage dip may cause wind farm outages. Since wind power contribution is in predominant percentage, such outages may lead to stability problem. The proposed strategy is to use dynamic voltage controller (DVR) to compensate the voltage disturbance. The DVR provides the wind generator the ability to remain connected in grid and improve the reliability. The voltage dips due to symmetrical and unsymmetrical faults are considered for analysis. The vector control scheme is employed for fault compensation which uses software phase locked loop scheme and park dq0 transformation technique. Extensive simulation results are included to illustrate the control and operation of DVR.

Study on Loss Reduction of Large Scale Wind Power Concentrated Integration on Power System

2013 ◽  
Vol 380-384 ◽  
pp. 3051-3056 ◽  
Author(s):  
Xiao Dan Wu ◽  
Wen Ying Liu
Keyword(s):  
Power System ◽  
Wind Power ◽  
Power Loss ◽  
Large Scale ◽  
Wind Farm ◽  
Reactive Power ◽  
Low Voltage ◽  
Main Step ◽  
Loss Reduction ◽  
Wind Generators

In this paper, starting from the active network loss formulas and wind characteristics, it is pointed out the reactive power loss and reactive flow is the major impact of wind power integration on power system loss. The reactive power loss formulas of box-type transformer, main step-up transformer, wind farm collector line and connecting grid line are analyzed. Next the reactive power loss of transformer and transmission line is described in detail. Then put forward the loss reduction measures that installing SVC on the low voltage side of the main step-up transformer and making the doubly-fed wind generators send out some reactive power at an allowed power factor. Use the case of Gansu Qiaodong wind farm to verify the effectiveness of the proposed measures.

scholarly journals Power Quality Improvement Using Dynamic Voltage Restorer on Grid-Connected Wind Energy System

2021 ◽  
Vol 23 (5) ◽  
pp. 401-407
Author(s):  
M. Praful Yadav ◽  
P. Sujatha ◽  
P.B. Kumar
Keyword(s):  
Wind Farm ◽  
Renewable Energy Sources ◽  
Wind Farms ◽  
Constant Speed ◽  
Wind System ◽  
Dynamic Voltage Restorer ◽  
Wind Generators ◽  
Fault Ride Through ◽  
Voltage Restorer ◽  
Dynamic Voltage

Reduction of fossil fuels and increasing technology made importance of wind generation as renewable energy sources. With increasing number of wind farms fed to grid increases grid fault issues due to various wind systems disconnected from grid during grid faults. To get better grid operation, wind farms are probable to be carried during disturbance related to grid faults extensively known as fault ride through capability. In proposed system a fault ride through method in wind farm management system connected to grid is investigated in term of critical clearing time. This paper examines the use of dynamic voltage restorer on the enhancement of fixed-speed wind generator systems. The controller capability performance, drive performance, and cost factor are considered. Simulation is performed using MATLAB Simulink for constant speed wind generators with closed-loop controller-based DVR are tested. The constant speed drive called synchronous generator-based wind system feed to an infinite bus system. Simulation results show the wind system with DVR has better fault ride-through capability other compensated voltages and is more efficient in minimizing voltage fluctuations called sag/swell and wind generator’s speed. Additionally, DVR aids wind generators to maintain voltage sag/swell with the grid limits requirements with economical as compared to other voltage compensating systems.

Voltage Drop Mitigation in Smart Distribution Network

2020 ◽  
pp. 64-77
Author(s):  
Fsaha Mebrahtu
Keyword(s):  
Low Voltage ◽  
Voltage Drop ◽  
Distribution Network ◽  
Economic Damage ◽  
Dynamic Voltage Restorer ◽  
Voltage Dip ◽  
Voltage Restorer ◽  
Clearing Time ◽  
Dynamic Voltage ◽  
Smart Distribution Network

Voltage dip in the distribution network is caused by disturbance at different voltage levels and experienced by low voltage customers are established. Voltage dips are those disturbances which damage the power quality of the distribution network and causing heavy economic damage to the customers. This chapter investigates procedures of mitigating the voltage dip by reducing the number of faults due to short circuits, lowering the fault clearing time, and changing the power system design and DSTATCOM Compensator with DG and dynamic voltage restorer.

scholarly journals Grid Code Requirements for Wind Power Integration in Europe

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Constantinos Sourkounis ◽  
Pavlos Tourou
Keyword(s):  
Wind Power ◽  
Power Plants ◽  
Low Voltage ◽  
Wind Power Integration ◽  
Wind Generators ◽  
Induction Generators ◽  
Grid Connection ◽  
Wind Power Plants ◽  
Grid Codes ◽  
Doubly Fed

As the capacity of wind power continues to increase globally, stricter requirements regarding grid connection of wind generators are introduced by system operators. The development of wind turbine technology is inevitably affected by the new grid codes, and wind power plants are expected to support the grid and provide ancillary services much like conventional power plants. The most demanding regulations are found in Europe where wind penetration levels are higher. This paper presents the main aspects of current grid code requirements for the integration of wind power in European countries and suggests performance characteristics in order to satisfy the most demanding requirements. The dynamic behavior of wind turbines with doubly fed induction generators is investigated and a solution for low voltage ride through compliance is presented.

Study of Improving Low Voltage Ride - Through Capability of Doubly - Fed Induction Generator by Using DVR

2014 ◽  
Vol 607 ◽  
pp. 531-535
Author(s):  
Chen Jian ◽  
Ren Yong Feng ◽  
Hu Hong Bin
Keyword(s):  
Power System ◽  
Wind Power ◽  
Low Voltage ◽  
Dynamic Voltage Restorer ◽  
Grid Voltage ◽  
Low Voltage Ride Through ◽  
Voltage Drops ◽  
Dynamic Voltage ◽  
Wind Power System ◽  
Doubly Fed

with the increasing proportion of wind power in whole power system ,the influence between wind power system and grid become more and more seriously ,so it is great important to research how to keep the connection between the wind power system and grid when grid voltage drops .The paper presents a new method to realize the low voltage ride - through (LVRT) of DFIG by using dynamic voltage restorer (DVR). Once the grid voltage drops,DVR will be put into use and produce compensation voltage to keep the stator side voltage steady .And it also can stop operation after the fault resolution.The paper builds a simulation model of DFIG and gives simulation results on PSCAD/EMTDC platform .

Overview on Key Technologies of Grid-Connected Wind Power Based on Energy Storage

2012 ◽  
Vol 608-609 ◽  
pp. 668-672
Author(s):  
Gui Xiong He ◽  
Zhe Jiang ◽  
Li Min Jiang ◽  
Hua Guang Yan ◽  
Xiao Bing Yang
Keyword(s):  
Energy Storage ◽  
Wind Power ◽  
Wind Farm ◽  
Low Voltage ◽  
Storage System ◽  
Wind Farms ◽  
Energy Storage System ◽  
System Stability ◽  
Stable Operation ◽  
Storage Technologies

In order to promote the development of wind power and accelerate the efficient use of new energy sources, countries have brought energy storage systems into grid-connected wind farms to achieve efficient and stable operation of the wind power plant. This paper recounts the latest development status and trend of wind power at home and abroad, and introduces the principle of power conversion between energy storage system and wind farm. Based on the existing research results, it analyses power system stability related to wind power, low voltage ride-through ability of wind turbine, wind power penetration limit, as well as power quality issues. It also describes the new ideas about how to use energy storage technologies to solve the problems faced by the wind power.

Research on Detection Method of Power Quality for Wind Power Connected to Grid

2013 ◽  
Vol 380-384 ◽  
pp. 2994-2998
Author(s):  
Xiang Yu Lv ◽  
Xue Fei Chang ◽  
De Xin Li ◽  
Ye Yuan
Keyword(s):  
Wind Power ◽  
Power Quality ◽  
Large Scale ◽  
Wind Farm ◽  
Detection Method ◽  
Testing System ◽  
Stable Operation ◽  
Wind Power Integration ◽  
Engineering Significance ◽  
Power Testing

Owing to the fluctuating and the randomness of wind speed, the influences of large-scale wind power integration on the grid should not be ignored. The output fluctuation of wind farm has serious effect on power quality, causing the problems like voltage flicker and harmonic, it will pose a threat on the safe and stable operation of power grid. This paper mainly analyzed the influence mechanism of wind power integration on power quality and studied the detection method of power quality. The effectiveness of the proposed method was verified by the simulation of real operation data of a wind farm in Jilin Province. The method presented in this paper will provide a reference for the establishment of Chinas wind power testing system and has important engineering significance.

Improving stability of utility-tied wind generators using dynamic voltage restorer

2014 ◽  
Vol 25 (4) ◽  
pp. 71-79 ◽  
Author(s):  
G Sivasankar ◽  
V Suresh Kumar
Keyword(s):  
Wind Power ◽  
Wind Farm ◽  
Short Circuit ◽  
Wind Farms ◽  
System Stability ◽  
Dynamic Voltage Restorer ◽  
Fault Ride Through ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
The Stability

The generation of electricity using wind power is significantly increasing and has received considerable attention in recent years. One important problem with the induction generator based wind farms is that they are vulnerable to voltage disturbances and short circuit faults. Any such disturbance may cause wind farm outages. Since wind power contribution is in considerable percentage, such outages may lead to power system stability issues and also violate the grid code requirements. Thus, improving the reliability of wind farms is essential to maintain the stability of the system. The proposed strategy is to use Dynamic Voltage Restorer (DVR), which is one of the promising devices to compensate the voltage disturbance and to improve the stability of the system. It provides the wind generator with the fault ride through capability and improves the reliability of the system. Extensive simulation results are included to illustrate the operation of DVR and fault compensation.

Study of System Stability Based on the Combination of Low Voltage Protection and Security Automatic Device

2014 ◽  
Vol 681 ◽  
pp. 169-172
Author(s):  
San Ming Liu ◽  
Zhi Jie Wang ◽  
Cheng Ying Lin ◽  
Hong Wang ◽  
Shu Ting Chen
Keyword(s):  
Wind Power ◽  
Wind Farm ◽  
Low Voltage ◽  
Automatic Device ◽  
System Stability ◽  
Generator System ◽  
Wind Power Integration ◽  
Operation Control ◽  
The Impact ◽  
Large Disturbance

Large disturbance stability of the system was greatly affected by the way of a lot of wind power centralized access to high voltage transmission network. We could use the traditional operation control scheme of controlling the wind farm and the nearby generator system operation output, but the wind farm and conventional power plant's interests would be seriously affected. Therefore, this paper put forward the control strategy by using the combination of low voltage protection and security automatic device. Large disturbance stability level could reach or close to the level before the wind, so as to minimize the impact of wind power integration on large disturbance stability of power system.

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