In order to provide customers with a high quality power consumption environment, pursuing higher quality and stable power supply is always listed in the company's annual major management performance indicators. There are two important indexes for power supply stability: SAIDI（System Average Interruption Duration Index）and SAIFI（System Average Interruption Frequency Index）to pursue excellent power supply quality. In 2008, the SAIDI was 0.354 min./customer.year and the SAIFI was 20.81 freq. / customer.year. For statistics, please refer to page 47.

    To stabilize power supply quality, the company specially set up a committee to take the responsibility of ① making decisions on improvement measures for power system stability and reliability and ② reviewing and following-up measures for strengthening power system stability.

    The improvement in the quality of power supply stability involves the company's units of generation, transmission, distribution, supply, and system operations. Currently, measures for power supply stability include: ① undertaking reasonable, effective and safe power dispatch, ② retrofitting the existing power plants and upgrading their heat rate, ③ adding high efficiency combined-cycle units to the power system, ④ balancing regional power demand, ⑤ simplifying the scales of power voltages, ⑥ installing transmission facilities, ⑦ strengthening power theft control, ⑧ conducting load management - implementing time-of-use and seasonal rates, interruptible power rates and promoting an ice-storage central air conditioning system.

    In addition to executing the annual plans of power supply and distribution system expansion to increase power supply capacity and strengthen load management, the company has also been actively implementing feeder automation system projects. It is in an effort to control system operation status to effectively reduce outage time and range.

    The major advantages of implementing the distribution feeder automation system are to reduce ① outage duration from 60 minutes (un-automated per fault) to lower than 5 minutes (automated per fault) and ② fault location time and effort. The priority areas for implementing the feeder automation system include science parks, industrial zones, popular areas in cities and counties, tourist scenic spots, and important government facilities. In 2008, Taipower accomplished the goal of installing 2,268 feeders. It has planned to install over 50% of the overall automatic feeders for the distribution system in 2011.