2009 Scenario Reliability Assessment - NERC

Scenario Reliability Self-AssessmentsFrequency response is not a concern for a hydro generator. However, depending on thepenetration level, frequency response can be a concern for a wind plant. Manitoba Hydroperforms the worst case nearby generator trip disturbances at maximum wind output andmonitors the under-frequency performance. A limit on the amount of wind that can be connectedwould be put in place if the transient under-frequency approaches the first setpoint of the underfrequencyload-shed relays. Alternatively, the wind plant would be required to provide inertialresponse. The 300 MW wind addition that is described above is not expected to cause anyfrequency response issues.Any wind located within Manitoba would be integrated into the market alongside existingresources within Manitoba. No market changes are required or assumed. However, there may bea benefit in sharing area control error differences between Manitoba and adjacent subregions.SaskatchewanSaskPower currently has 172 MW of installed wind capacity and has plans to add 25 MW in2011 and an additional 200 MW by 2013.Region DescriptionThe Midwest Reliability Organization (MRO) has 48 members which include Cooperative,Canadian Utility, Federal Power Marketing Agency, Generator and/or Power Marketer, SmallInvestor Owned Utility, Large Investor Owned Utility, Municipal Utility, Regulatory Participantand Transmission System Operator. The MRO has 19 Balancing Authorities (prior to MidwestISO BA consolidation) and 116 registered entities. The MRO Region as a whole is a summerpeaking Region. The MRO Region covers all or portions of Iowa, Illinois, Minnesota, Nebraska,North and South Dakota, Michigan, Montana, Wisconsin, and the provinces of Manitoba andSaskatchewan. The total geographic area is approximately 1,000,000 square miles with anapproximate population of 20 million.2009 Scenario Reliability Assessment Page 53