Reactive power compensation in distributed networks with wind turbine integration using resonant corrector

Wind turbine absorbs reactive power while generating active power. Seriously, it causes voltage drop or even voltage collapse. It is needed to compensate reactive power. In this paper, a combination of capacitor bank and SVC is used in wind farm. Equivalent circuit of two kinds of wind turbine is described firstly. Then, equation of reactive power and active power is derived. Then an optimization method is used to calculate capacity of capacitor bank and SVC. Finally, load flow of IEEE14 system with a wind farm connected to it is calculated to verify the effect of reactive power compensation.

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Study on Reactive Power Compensation of Single Wind Farm

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.608-609.573 ◽

2012 ◽

Vol 608-609 ◽

pp. 573-578

Author(s):

Yue Li ◽

Bao Zhu Liu

Keyword(s):

Wind Turbine ◽

Power Loss ◽

Wind Farm ◽

Reactive Power ◽

Reactive Power Compensation ◽

Power Network ◽

Generation System ◽

Reactive Compensation ◽

Compensation Device ◽

Node Voltage

With the proportion of wind turbine generation system(WTGS) in power grid is highly increasing, which produces a great effect on the security and stability of the electric power network. Considering the current condition and characteristic of wind form, we built a simulation model in the imitative situation with different wind turbine outputs and different feeder types, obtained the reactive power loss of wind farm and key node voltage, as well as the ability of fixed compensation device. By using the reactive power generated from wind turbine, it can reduce capacity of the reactive compensation device in collection station, which realizes the balance of reactive power, increases the voltage stability.

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Mechanism of Large Scale Cascading Trip-Off of Wind Turbine Generators

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.724-725.485 ◽

2013 ◽

Vol 724-725 ◽

pp. 485-490 ◽

Cited By ~ 1

Author(s):

Ling Zhou ◽

Xiao Fang Song ◽

Hai Bo Xu ◽

Kang Chang ◽

Ji Chen Li ◽

...

Keyword(s):

Wind Turbine ◽

Large Scale ◽

Wind Farm ◽

Reactive Power ◽

Low Voltage ◽

Reactive Power Compensation ◽

Turbine Generators ◽

Wind Turbine Generators ◽

Compensation Device ◽

Doubly Fed

This paper analyses the mechanism of large scale cascading trip-off failures of wind turbine generators in China, focuses on the reasons of trip-off caused by overvoltage. It analyses the model of Doubly Fed Induction Generation (DFIG) and builds a model of a wind farm that is composed of Doubly Fed Induction generators in DIgSILENT. The wind farm A with capacity of 175MW and wind farm B with capacity of 175MW is accessed to the nine bus system. The simulation reproduces the processes of the cascading trip-off of wind turbine generators caused by undervoltage and overvoltage. The trip-off caused by undervoltage is due to the lack of Low Voltage Ride Through (LVRT). And that the capacitive reactive power compensation device is not timely removed leads to a large surplus of reactive power, then the voltage rises, so the wind turbine generators trip off because of overvoltage. By setting the contrast scenario, the result shows that if capacitive reactive power compensation device is promptly removed after the loss of a large amount of active power, the wind turbine generators will not trip off because of overvoltage.

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