American Transmission Company LLC II Smart Grid Project

American Transmission Company, LLC has been selected by the U.S. Department of Energy to receive funding of $11.4 M to go towards the development of a smart grid.

American Transmission Company’s (ATC) Phasor Measurement Unit Project is deploying synchrophasor technologies across the company’s Wisconsin service area. The project expands the collection of synchrophasor data throughout ATC’s transmission system from 25 substations to 73 substations by project completion. ATC is using synchrophasor monitoring to improve electric system reliability and restoration procedures and to help prevent the spread of local outages to neighboring regions. The project deploys phasor measurement units (PMUs), digital fault recorders (DFRs), a new synchrophasor data concentrator, and improved data collection software. These devices increase the ability of grid operators to monitor the condition of bulk power systems in near-real time, enable earlier detection of conditions that could result in grid instability or outages, and facilitate the sharing of information with neighboring regional control areas.

Smart Grid Equipment

• 48 Phasor Measurement Units
• 1 Phasor Data Concentrator
• Synchrophasor Communications Network
• Angle/Frequency Monitoring
• Post-Mortem Analysis
• State Estimation
• Steady-State Model Benchmarking

Targeted Benefits

• Improved Electric Service Reliability
• Reduced Congestion Cost
• Reduced Costs from Transmission Line Losses
• Reduced Electricity Costs for Customers
• Reduced Operating and Maintenance Costs
• Reduced Wide-Scale Blackouts