Providing customers with high quality power, and pursuing higher reliability and stable power supply are always the Company's annual major management performance targets. There are two important indexes for power supply reliability: SAIDI (System Average Interruption Duration Index) and SAIFI (System Average Interruption Frequency Index). In 2010, the SAIDI was17.663 Min./customer．year and the SAIFI was 0.196 freq./customer．year. Both were the best records in Taipower’s history. To enhance power supply stability, Taipower adopted the following measures:

• Establishing the “Power System Stability and Reliability Improvement Task Force” to integrate and promote related work.

• Upgrading generation units' efficiency, establishing advanced process control (APC) system for thermal power plants, upgrading BOP integrated digital control system for nuclear units, etc.

• Strengthening power dispatch and improving construction methods, such as promoting non- interruption construction methods, enhancing midnight and live line operation, reinforcing distribution facility maintenance, incident repair skill improvement, etc.

• Controlling salt and fog damage to power transmission line:

  Thanks to a joint effort of some 80,000 man-days of proper maintenance tasks, the salt and fog damage incidents were reduced to 0.018 freq./100 ckt-km, lower than the 10-year average of 0.047 freq./100 ckt- km.

• Developing Transmission Line Fault Location Reporting System:

  Taipower developed by itself a set of “345KV Transmission Line Fault Location Reporting System”. When a transmission line outage occurs, it can reduce monitoring errors and immediately inform patrol staff through text messages about fault locations to narrow down their patrol areas. In 2010, the system greatly saved 5,268 kilometers of patrol distance, about 4 times the length of Taiwan’s coastline. In recognition of this achievement, Singapore-based Asian Power magazine presented a gold medal to Taipower as the “Best Asian Transmission and Distribution Project of the Year”.