Invensys Process Systems has announced that the implementation will utilise the Foxboro high-speed mesh control network backbone to maximise system availability and reliability. Invensys Taiwan will also provide a range of professional services.

The new systems at Takuan will control Plant 1, comprising four 22MW hydroelectric generation units, and Plant 2, which consists of four 250MW hydroelectric pumping units. The plants utilise water stored in Sun-Moon Lake, Taiwan’s largest natural lake. The new automation system’s capabilities, in conjunction with the physical nature of the units, will allow it to provide frequency stabilisation during daytime generation and optimisation for off-peak pumped storage, addressing a critical problem for the island’s isolated grid. During the day, the plants provide power for local industry and the regional electric grid. At night, surplus generation capacity is used to pump water above the dam and back into Sun-Moon Lake, where it is stored for the next day’s generation.

The new systems, connecting more than 10,000 I/O points with a new central control room, will drive several critical applications: automatic generation control; hydroelectric generation; hydroelectric dispatch; pumping/generation sequence and optimisation, and events history. The latter utilises I/A Series TDR/TDA (transient data recording/transient data analysis) capabilities. Together, these applications allow Taipower to determine exactly when to generate and when to store electricity, while using Takuan’s plant assets most economically.

Invensys Taiwan will work closely with Taipower’s engineering, technical and operating personnel, providing a variety of professional services, including project management, engineering services, site installation, commissioning, startup assistance and training programmes.

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