德基

Techi Power Plant is located on the upper reaches of the Dajia River in Heping District, Taichung City. The Techi Reservoir is the uppermost and highest-elevation major reservoir in the Dajia River hydro system, with its discharged water reused successively at the downstream Guguan and Tianlun plants.

The Deji Dam, completed in 1973, stands 180 meters tall — once Asia's highest double-curvature concrete arch dam and still Taiwan's tallest reservoir dam today. The power plant is built 270 meters underground on the dam's left bank, housing three vertical-shaft Francis turbine-generator units of 78,000kW each; since 1996 it has operated as a branch plant of the consolidated Dajia River Power Plant, alongside Qingshan and Guguan.

德基 (Hydro) currently reports a net generation of 0 MW across 3 unit(s), against an installed capacity of 234 MW (0% utilization).

Hydro plants can start or stop within seconds to minutes, making them one of the grid's fastest tools for frequency regulation and peak-shaving. The pumped-storage plants around Sun Moon Lake (Mingtan, Daguan) pump water uphill using off-peak electricity and release it to generate during peak demand, effectively acting as large-scale energy storage. Output is highly dependent on rainfall and reservoir levels.

Hydropower was Taiwan's earliest form of electricity generation, with several plants dating back to the Japanese colonial era. Because most viable river sites have already been developed, hydro capacity has grown little in recent decades and its share has been diluted by the rapid expansion of gas and solar. Its low-carbon, fast-dispatch characteristics nonetheless keep it strategically important for grid stability as variable renewables expand.