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Product Abstract

A Case Study on Evaluating the Protection Impacts Associated with the Integration of a Wind Park on the Distribution System at Hydro-Québec: Hydro-Québec Smart Grid Demonstration

Product ID:3002004503
Date Published:19-Dec-2014
Sector Name:Power Delivery & Utilization - Distribution & Utilization
Document Type:Technical Results

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This case study is an analysis of the protection impacts associated with the integration of a 15 MW wind park connected to a 25 kV rural distribution feeder at Hydro-Quebéc. The study was performed to validate overcurrent protection coordination in the presence of the wind park, and to assess the risk of anti-islanding. The project team assessed the two most common large wind energy convertor (WEC) topologies employed by the industry, Type 3 and Type 4.

This is an exhaustive parametric study based on modeling, with the following objectives:

  • Evaluate line protection approaches for wind parks connecting to distribution. Does standard line and ground overcurrent protection work with an inverter-based WEC? In the case where this approach is not effective, what alternate relays can be used to cover the zones required by the interconnection standard? Additionally, does nuisance tripping occur; that is, does the wind park disconnect when it otherwise should not?
  • Determine whether the risk of islanding is sufficiently high to warrant the use of the transfer-trip scheme for anti-islanding protection of Hydro-Québec wind parks. Can local protection relays, such as voltage and frequency relays, be used to detect islanding in all probable cases encountered in a distribution network? In the event additional measures are required, is a transfer-tripping scheme the only practical alternative, or can complementary relays be added that would eliminate the non-protection zones without leading to nuisance tripping?

This report presents the results of the study, as well as recommendations for protection systems to employ at Hydro-Quebec, which is integrating roughly 150 MW of wind generation into its distribution network in 2014-2015. The 150 MW wind generation is from five different wind parks that are served from a weak rural distribution system.

2014 Program D_SG   Smart Grid Demonstration
  • Wind energy
  • Distributed generation
  • Protection
  • Smart grid
  • Distribution system
  • Anti-islanding

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