A Static VAR Compensator Model for Improved Ride-Through Capability of Wind Farms

Abstract

Dynamic reactive compensation is associated with reactive power and voltage control of induction generator based wind turbines. With regard to wind power, application areas of dynamic reactive compensation can be improvement of the power quality and the voltage stability, the control of the reactive power exchange between the wind farm and the power grid in the wind farm connection point as well as improvement of the ride-through capability of the wind farm. This article presents a model of a Static VAR Compensator (SVC) with dynamic generic control that is a kind of dynamic reactive compensation devices. The term “generic” implies that the model is general and must cover a variety of the SVC units and their specific controls from different manufacturers. The SVC model with dynamic generic control is implemented by Eltra in the simulation tool Powerfactory and validated from the SVC model in the tool PSCAD/EMTDC. Implementation in the tool Powerfactory makes it possible to apply the SVC model with dynamic generic control in investigations of power system stability with regard to establishment of large wind farms without restrictions on the model size of the power grid.

Keywords

Static VAR Compensator wind farm induction generator model stability ride-through capability validation Powerfactory

References

Abdin

E.S.

(2000). Control design and dynamic performance analysis of a wind turbine induction generator unit, IEEE Transactions on Energy Conversion, vol. 15, No.1, pp. 91–96.

Akhmatov

Knudsen

Nielsen

A.H.

Pedersen

J.K.

Poulsen

N.K.

(2003). Modelling and transient stability of large wind farms, Electrical Power and Energy Systems, Vol. 25, No. 1, pp. 123–144.

Cai

(2004). Robust coordinated control of FACTS devices in large power systems, Logos Verlag Berlin, 10243 Berlin, 172 p., in Part 2.

Eltra (2000). Specifications for connecting wind farms to the transmission network, 2nd Ed., ELTRA Transmission System Planning, Denmark: ELT1999–411a, available on: www.eltra.dk/.

Eriksson

Halvarsson

Wensky

Häusler

(2003). System approach of designing an offshore wind power grid connection, Proceedings of 4th International Workshop on Large-scale Integration of Wind Power and Transmission Networks for Offshore Wind Farms, Billund, Denmark, 11 p.

Heggli

P.M.

Dihwa

Strömberg

Thorvaldsson

Larsson

L.O.

(1996). System stability improvement in the RSA -Zimbabwe AC interconnection by installation of an SVC, available on: www.ece.umr.edu/links/power/Energy_Course/energy/facts/svc/cigrersa.pdf.

Kundur

(1994). Power system stability and control, EPRI PSE -Series, Mc-Graw Hill, N.Y., 1179 p.

Köning

Luther

Winter

(2003). Offshore wind power in German transmission networks, Proceedings of 4th International Workshop on Large-scale Integration of Wind Power and Transmission Networks for Offshore Wind Farms, Billund, Denmark, 6 p.

Noroozian

Knudsen

H. Bruntt M.

(1999). Improving a wind farm performance by reactive power compensation, Proceedings of IEEE Summer Meeting, Singapore, 6 p.

10.

Parihar

Karady

G.G.

(1997). Characterisation of a thyristor controlled reactor, Electric Power Systems Research, vol. 41, pp. 141–149.

11.

Saad-Saoud

Lisboa

M.L.

Ekanayake

J.B.

Jenkins

Strbac

(1998). Application of Statcoms to wind farms, IEE Proceedings-C Generation, Transmission, Distribution, vol. 145, no. 5, pp. 511–516.

12.

Søbrink

K.H.

Schettler

Bergmann

Stöber

Jenkins

Ekanayake

Pedersen

J.K.

Pedersen

K.O.H.

(1998). Power quality improvements of wind farms, Fredericia, Denmark, ISBN No.: 87-90707-05-2.