Impact study of short-circuit calculation methods on the design of a wind farm's grounding system

Safe operation of a wind farm (W/F), under fault conditions, requires a grounding study to ensure protection against developed voltages (step and touch). A key stage in the design of a wind farm's grounding system is to determine the maximum ground fault current. The aim of this work is to examine how different short-circuit calculation (SCC) procedures affect the calculation of developed voltages (step and touch) at a wind farm and therefore the provided level of safety. For this purpose, the response of the interconnected grounding system of an actual wind farm is calculated, under fault conditions, using three alternative SCC methods and the results obtained concerning violation or not of safety criteria are presented.

[1]  I. A. Reid.  Book review: IEEE Guide for Safety in AC Substation Grounding—ANSI/IEEE Std. 80-1986 , 1988 .

[2]  I.F. Gonos,et al.  Estimation of multilayer soil parameters using genetic algorithms , 2005, IEEE Transactions on Power Delivery.

[3]  Sponsor,et al.  IEEE guide for safety in AC substation grounding , 2013 .

[4]  Alberto Berizzi,et al.  Short-circuit current calculation : a comparison between methods of IEC and ANSI standards using dynamics simulation as reference , 1994 .

[5]  S. Massucco,et al.  Short-circuit current calculation: a comparison between methods of IEC and ANSI standards using dynamic simulation as reference , 1993, Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting.

[6]  Ismail Kasikci.  Short Circuits in Power Systems: A Practical Guide to IEC 60909-0: A Practical Guide to IEC 60909 , 2002 .

[7]  Ioannis A. Stathopulos,et al.  Estimation of multi-layer soil parameters using genetic algorithms , 2004 .

[8]  Stavros A. Papathanassiou,et al.  Short-circuit calculations in networks with distributed generation , 2008 .

[9]  H. Sieling,et al.  Comparison of ANSI and IEC 909 short-circuit current calculation procedures , 1991, Industry Applications Society 38th Annual Petroleum and Chemical Industry Conference.

[10]  A.J. Rodolakis,et al.  A comparison of North American (ANSI) and European (IEC) fault calculation guidelines , 1991, Conference Record of the 1991 IEEE Industry Applications Society Annual Meeting.