Nuremberg, Germany, January 12, 2012 — In late 2011, as the result of the Advanced Control Center (AC2) program run by the regional transmission grid operator PJM Interconnection, an advanced grid management systems commenced operation and is being used to manage North America's largest transmission grid.

The grid management system integrates the Siemens Spectrum Power energy management system and is based on a shared architecture integration platform developed by Siemens Infrastructure & Cities and PJM.

The system is operated at two different sites. The control centers at each site are fully functional and capable of running the grid either independently or jointly as a single virtual control center. PJM is the only grid operator in North America and one of the few companies worldwide to have dual primary control centers.

With two fully staffed primary control centers staffed, PJM's Advanced Control Center (AC2) program improves the reliability of the grid and enables practically uninterrupted power supply and grid control, in case either of the control centers should suffer a malfunction.

This PJM program is based on a shared architecture platform. Shared architecture is a standardized integration platform for applications that differ in terms of their technology, such as energy management, market management and distribution management systems.

The open architecture allows integration of traditional utility applications into new smart grid applications. It also offers power utilities a degree of flexibility and options that vendors of older grid control center applications would not have been able to provide.

Siemens and PJM are aiming to cooperate with other interested partners in this field, with a view to advancing the development of modern smart grid integration platforms and in order to contribute to the drafting of integration standards for smart grid architectures.

PJM Interconnection is a regional transmission organization (RTO), responsible for power transmission on the energy trading market in numerous states. As an independent corporation PJM operates an energy trading company on the electricity market, as well as a high-voltage network for power supplies to more than 58 million people. PJM monitors and coordinates more than 1,365 generators, 97,900 kilometers of high-voltage lines and 6,185 substations.