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The Midwest Independent Transmission System Operator (MISO) says it recently became one of the first grid operators across the U.S. to utilize new synchrophasor technology through MISO's Real-Time System Operations for grid monitoring and analysis.

MISO says the synchrophasor technologies use phasor measurement units (PMUs) to collect data from more than 344 installed devices, 30 times per second - compared to traditional technology, which records measurements every four seconds. The data is GPS time-stamped, enabling measurements from different locations to be time-synchronized and combined to create a detailed, wide-area assessment of system conditions, the operator adds.

"Incorporating these new technologies into real-time operations greatly increases our situational awareness of grid activity and is essential to our effort to modernize the grid,” says Richard Doying, executive vice president of operations and corporate services. “Synchrophasor technologies provide us with unprecedented data on situations that could radically affect reliability.”

In 2010, MISO was among 100 recipients of the U.S. Department of Energy's (DOE) Smart Grid Investment Grant awards. MISO received a $17.25 million grant to fund the development and deployment of PMUs as part of the DOE's effort to modernize the power grid. MISO members received a one-year extension to install additional synchrophasors at no extra cost.

As part of the project, MISO's team of engineers established a new feature for Control Room displays called enhanced Real-Time Display or (eRTD) to give system operators a geospatial visualization of grid activity. MISO says eRTD also provides two-way visualization of real-time grid activity, so now participating transmission owners have the advantage of seeing the same displays as MISO control room operators.

The operator notes the three-year project came in on time and under budget and involved 17 MISO transmission owners.



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