Summary and Analysis on the Low Voltage Ride through Reformation of the Wind Power Turbine

2012 ◽  
Vol 608-609 ◽  
pp. 781-784
Author(s):  
Gui Xin Hou ◽  
Qi Hui Liu ◽  
Fang Yu ◽  
Ying Li
Keyword(s):  
Power System ◽  
Wind Power ◽  
Large Scale ◽  
Wind Farm ◽  
Low Voltage ◽  
Low Voltage Ride Through ◽  
Power Turbine ◽  
Wind Power System ◽  
The Stability ◽  
Power Capability

As the increasing of the wind power capability， in order to ensure the stability of the grid while the voltage dips， the LVRT ability of the wind power turbine has become necessary. Realizing LVRT， is not only the question the built and will build wind power system are facing, but also the challenge of the will build and operating ones. Actually, many connected operating wind power system can’t meet the LVRT, this is why the large scale wind power off-grid events happened frequently, so the reformation of the wind power system LVRT is an emergency question to be solved. This paper introduced the main methods for LVRT reformation, based on this, some LVRT reform equipment was summarized for the wind turbine; and further, some reform methods were introduced for wind farm.

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.

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 .

Simulation Research on Improving Low Voltage Ride through of a Wind Farm by SVC

2013 ◽  
Vol 339 ◽  
pp. 608-613 ◽  
Author(s):  
Yan Shi ◽  
Chun Xu Zhang ◽  
Guang Lei Li ◽  
Yan Cheng ◽  
Shu Min Sun
Keyword(s):  
Large Scale ◽  
Wind Farm ◽  
Fault Location ◽  
Reactive Power ◽  
Low Voltage ◽  
Negative Impact ◽  
Simulation Models ◽  
Simulation Research ◽  
Low Voltage Ride Through ◽  
The Stability

Large-scale wind farm connecting to the grid will affect the stability of the grid, therefore dynamic reactive power compensation devices need to be installed at the wind farm in order to reduce the negative impact after connecting to the grid, andimprove the low voltageridethrough capability of the grid system wind turbine. Simulation models of a wind farm and SVCare built in PSCAD. In different fault location, simulations are carried out respectively to analyze the effect of SVC on LVRT. The results show that SVC can effectively improve the LVRT capability.

scholarly journals Evaluation Method of Wind Speed Time-Shifting Characteristics at Multiple Scales and Its Application in Wind Power System

2020 ◽  
Vol 2020 ◽  
pp. 1-17
Author(s):  
Han Wang ◽  
Shuang Han ◽  
Yongqian Liu ◽  
Aimei Lin
Keyword(s):  
Wind Speed ◽  
Power System ◽  
Wind Power ◽  
Large Scale ◽  
Wind Farm ◽  
Evaluation Method ◽  
Multiple Scales ◽  
Wind Farms ◽  
Physical Method ◽  
Wind Power System

The wind speed sequences at different spatial positions have a certain spatiotemporal coupling relationship. It is of great significance to analyze the clustering effect of the wind farm(s) and reduce the adverse impact of large-scale wind power integration if we can grasp this relationship at multiple scales. At present, the physical method cannot optimize the time-shifting characteristics in real time, and the research scope is concentrated on the wind farm. The statistical method cannot quantitatively describe the temporal relationship and the speed variation among wind speed sequences at different spatial positions. To solve the above problems, a quantification method of wind speed time-shifting characteristics based on wind process is proposed in this paper. Two evaluation indexes, the delay time and the decay speed, are presented to quantify the time-shifting characteristics. The effectiveness of the proposed method is verified from the perspective of the correlation between wind speed sequences. The time-shifting characteristics of wind speed sequences under the wind farms scale and the wind turbines scale are studied, respectively. The results show that the proposed evaluation method can effectively achieve the quantitative analysis of time-shifting and could improve the results continuously according to the actual wind conditions. Besides, it is suitable for any spatial scale. The calculation results can be directly applied to the wind power system to help obtain the more accurate output of the wind farm.

Overview of the Low Voltage Ride-Through Technology for Direct-Drive Permanent Magnetic Wind Power System

2011 ◽  
Vol 383-390 ◽  
pp. 424-429
Author(s):  
Xin Zhang Huo ◽  
Xiang Ning Xiao
Keyword(s):  
Adverse Effect ◽  
Power System ◽  
Wind Turbine ◽  
Wind Power ◽  
Low Voltage ◽  
Direct Drive ◽  
Low Voltage Ride Through ◽  
Control Objective ◽  
On Line ◽  
Wind Power System

In recent years, the proportion of the wind power in the grid is increasing rapidly. In addition, the penetration of wind power in grid has been rising. It will lead adverse effect to grid, if the wind turbine off-grid during the fault of network. Wind power technology-leading countries have issued the quantitative standards of fault through which requires on-line operation .In this paper, the influence of wind turbines off-grid on the grid and turbines during the fault of grid is analyzed firstly. Meanwhile, the control objective of the low voltage ride through (LVRT) is proposed. Several types of LVRT technology for the Permanent Magnetic wind Power System are summarized and evaluated respectively. Finally, the developing direction of this technology is drawn from the above discussion.

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