Modal Analysis of Induction Generator Based Wind Farm Connected to Series-compensated Transmission Line and Line Commutated Converter High-Voltage DC Transmission Line

Abstract

This article presents a comprehensive analysis of the potential of sub-synchronous resonance in induction generator based wind farms connected to a line commutated converter based high-voltage DC transmission line. Since series-compensated lines are also known to cause sub-synchronous resonance in induction generator based (Type 1) wind farms, this study also considers a series-compensated line in parallel with the high-voltage DC line for the investigation of sub-synchronous resonance potential. The CIGRE benchmark high-voltage DC system and the IEEE first benchmark system are considered as the study system components. A linearized state-space model of the study system is developed for eigenvalue analysis followed by participation factor analysis. A sensitivity study of the sub-synchronous resonance modes with respect to variation in different model parameters, such as rectifier firing angle, DC line power flow, and series compensation level, is also reported. It is found that the high-voltage DC rectifier station current regulator does not interact with any of the sub-synchronous modes of the wind farm. However, in the event that the high-voltage DC line is blocked during a contingency, the wind farm will operate radially with the series-compensated line and may experience sub-synchronous resonance oscillation due to the induction generator effect.

Keywords:

• induction generator
• sub-synchronous resonance
• high-voltage DC transmission
• series compensation
• torsional interaction
• induction generator effect

Additional information

Notes on contributors

Akshaya Moharana

Akshaya Moharana (Member IEEE 2013) obtained his B. Eng. degree in Electrical and Electronics Engineering from Biju Patnaik University of Technology, Bhubaneswar, India in 2005 and PhD degree in Electrical Engineering from University of Western Ontario, London, Canada in 2012. He has worked as a research engineer in research project sponsored by Govt. of India from 2005–2008. Currently he is working as Power system studies engineer at Powertech labs, Surrey, Canada. Prior to this position he has worked as a postdoctoral research fellow at University of Western Ontario, London, Canada from 2012–2013. His area of interest includes HVDC, FACTS, Distributed Generation Interconnection, Network Resonance and Power Quality.

Rajiv K. Varma

Rajiv K. Varma obtained B.Tech. and Ph.D. degrees in Electrical Engineering from Indian Institute of Technology (IIT), Kanpur, India, in 1980 and 1988, respectively. He is currently an Associate Professor and Hydro One Research Chair in Power Systems Engineering at the University of Western Ontario (UWO), London, Ontario, Canada. Before joining Western in 2002, he was a Faculty Member at IIT Kanpur, India, for 11 years. Rajiv Varma has co-authored the book “Thyristor-Based FACTS Controllers for Electrical Transmission Systems” published by IEEE Press and John Wiley & Sons. He has co-delivered several Tutorials on “Static Var Compensator (SVC)” conducted by the IEEE Substations Committee. He is the Chair of IEEE Working Group on “FACTS and HVDC Bibliography”. He has received several teaching excellence awards at the Faculty and University levels at UWO. His research interests include FACTS, power systems stability, and grid integration of wind and PV solar power systems.

Ravi Seethapathy

Ravi Seethapathy is Manager – Systems Innovation & Advanced Grid Development, at HydroOne Networks in Toronto, Canada. He led the power systems technical architecture of its Advanced Grid System Pilot Project (Smart Grid) from 2009–2011. He led the Corporate Smart Grid Strategy Task force in 2008 and from 2006 led the initial efforts in the integration of DER in the Hydro One Distribution systems. Ravi serves as an Adjunct Professor at the University of Toronto and University of Western Ontario. He was honoured as the Fellow of the Canadian Academy of Engineering in 2012. He was also honoured as a recipient of Queen Elizabeth-II, Diamond JubileeMedal in 2012. Ravi has over 29 years of experience (in Hydro One/erstwhile Ontario Hydro) in all fields of electric utility business and has progressively held leading positions in Protection & Control, Field Operations, Hydraulic Generation and Transmission Operations, Generation Performance, Distribution Strategy and Planning, Mergers & Acquisition, Corporate Audit, Asset Management and Asset Strategies Divisions and now in Corporate Research.s