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The Midwest Independent Transmission System Operator (Midwest ISO) has implemented OSIsoft's PI System for monitoring and managing the Midwest energy market.

The PI System enterprise data historian provides the Midwest ISO with real-time data management to enhance grid reliability and scalability, while minimizing risk, according to OSIsoft.

"With its proven ability to handle the complexity of our interconnected system, the OSIsoft PI System provides us with the high availability and scalability that we need to operate in this competitive marketplace," says Jim Schinski, chief information officer for Midwest ISO.

The Midwest ISO's PI System implementation will monitor 500,000 PI tags (data streams) in a high-availability configuration, interfacing with its Areva supervisory control and data acquisition system. The Midwest ISO plans to upgrade its PI System to 600,000 data streams when its ancillary services market (ASM) begins operation in mid-2008. The Midwest ISO's ASM will enable power producers to sell additional services such as regulation services and spinning and non-spinning reserves to provide even greater grid stability.


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