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Symphony Plus evolution for Te Rapa cogeneration plant in New Zealand

ABB was awarded a contract by Contact Energy Limited, the second-largest electricity generation company in New Zealand for upgradation of ABB’s INFI 90 Harmony to Symphony Plus for its cogeneration power plant located in Fonterra dairy factory at Te Rapa, near Hamilton, New Zealand. The cogeneration plant consists of a GT, HRSG and Auxiliary boiler. The plant was commissioned in 1999 and the Te Rapa power plant provides power and process steam to the dairy factory, while excess electricity is exported to the local network.

ABB was responsible for complete system design, engineering, project management, testing, installation supervision,

and commissioning of the upgrade from INFI 90 Harmony Block to the latest Symphony Plus HR Series (Harmony Rack) products. 

With ABB’s long-standing “Evolution without obsolescence” strategy of upward compatibility with its predecessors, the customer was able to protect their intellectual investments made in their INFI 90 Harmony system. The step-wise evolution approach gave the customer the flexibility to update the system with no change in their logic configuration methods.

In addition, human knowledge gained and invested in the existing DCS carries forward as the system evolves, thus reducing resource allocation required by a rip-and-replace alternative. 

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