Improve Power Supply Reliability
In recent years, Taiwan's power consumption has repeatedly reached record highs. Since Taipower is responsible for ensuring a stable power supply, this has meant continuously implementing power source development projects. Through new units and the addition of renewable energy, as well as Time of Use (TOU) rates, Demand Response, and response measures for peak hours at night, Taipower has maintained a reserve capacity of above 8% during peak hours. The Company continues to refine its traditional unit dispatching strategy, and also combines demand side management measures, such as TOU rates and ADR,to increase overall power supply stability. With regards to nuclear power plants, main management measures include analyzing and reviewing operational weaknesses that are identified by each nuclear power plant, strengthening the management of activities during major maintenance periods, implementing equipment improvements and upgrades, and reviewing unplanned incidents that have occurred during the year.
Total Amount and Composition of Power Generation from 2021 to 2023
| 2021 | 2022 | 2023 | ||||
| Billion kWh | Percentage | Billion kWh | Percentage | Billion kWh | Percentage | |
| Net Amount of Power Generated and Purchased | 248.8 | 100.0% | 250.7 | 100.0% | 245.5 | 100.0% |
| Amount of Power Generated | 189.1 | 76.0% | 188.3 | 75.1% | 174.5 | 71.1% |
 Pumped Storage Hydro |
3.2 | 1.3% | 3.1 | 1.2% | 3.0 | 1.2% |
 Thermal |
155.2 | 62.4% | 156.0 | 62.2% | 149.7 | 61.0% |
 Nuclear |
26.8 | 10.8% | 22.9 | 9.1% | 17.2 | 7.0% |
 Renewable Energy |
3.9 | 1.6% | 6.3 | 2.5% | 4.6 | 1.9% |
| Amount of Purchased Power | 59.7 | 24.0% | 62.5 | 24.9% | 71.0 | 28.9% |
| Privately-Owned Thermal |
42.7 | 17.1% | 43.7 | 17.4% | 45.3 | 18.5% |
| Renewable Energy |
11.9 | 4.8% | 15.3 | 6.1% | 19.7 | 8.0% |
 Cogeneration |
5.1 | 2.1% | 3.4 | 1.4% | 5.9 | 2.4% |
Note: Detailed items are not equal to the total due to rounding, and the round-off difference is not adjusted.
Power Dispatch and Reliability Management Mechanism
Regular Review and Analysis
- Conduct regular electromechanical system incident review meetings
- Conduct regular power dispatch system incident review meetings
Risk Management Implementation
- Given the impact of different power incidents on power dispatching reliability and stability,power shortages affecting system stability and safety are listed as a risk control event. The risk level is determined according to the degree of impact and measurement standards in different scenarios. Also, relevant measures are formulated for tracking and control.
- Quarterly follow ups on reviews and execution.
- Conduct a general review at the end of the quarter and set future control objectives.
Personnel Training
- Online dispatchers trained and conducted license certification examinations for new dispatchers.
- Licensed personnel may renew their licenses after completing a certain number of retraining hours every three years.
Ensuring Nuclear Power Safety
The Company always adheres to the concept of "defense-in-depth" to ensure the safe operation of its nuclear power plants. Taipower aims to:
01
Prevention
Evaluation and prevention are conducted in advance based on various extreme conditions.
02
Mitigation
Disaster mitigation is executed to prevent the leakage of radioactive materials from nuclear power plants.
03
Emergency Preparedness
If disaster mitigation fails to prevent external leakages of radioactive materials, protective actions will be taken to reduce the radiation exposure outside the plant.
04
Strategy
Specific Major Incident (SMI) Guidelines were developed as a basis for decision-making and operations, and are based on current design benchmarks for earthquake resistance and tsunami prevention at nuclear power plants, emergency operating procedures and severe nuclear outage handling guidelines. In normal times, the guidelines serve as a standard for personnel training and drills.
Improve Power Supply Reliability
Taipower is committed to improving the management efficiency of the power system, focusing mainly on improving unit availability. This requires preventive maintenance, regular inspections and improvements to the weaknesses of generator units to prevent potential problems and effectively reduce the unit failure rate.
Taipower's currently uses the System Average Interruption Duration Index (SAIDI) and the System Average Interruption Frequency Index (SAIFI) as performance indicators for power supply reliability. The SAIDI was 15.225 minutes and the SAIFI was 0.186 times in 2023. Taipower has implemented the Distribution System Resilience Project in recent years, and the number of power outages due to distribution accidents has dropped by nearly 25% compared with 2022. Taipower will continue to implement the Distribution System Resilience Project and a comprehensive feeder automation system, striving to achieve fewer power outages and faster recovery, and exerting every effort to reduce the impact of power outages on the public.
Power Supply Reliability Results from 2021 to 2023
System Average Interruption Duration Index
System Average Interruption Frequency Index
| 2021 | 2022 | 2023 | ||||
| Target | Performance | Target | Performance | Target | Performance | |
| Working blackout | 12.213 | 11.732 | 12.176 | 11.298 | 12.103 | 11.292 |
| Outage blackout | 4.487 | 4.644 | 4.424 | 3.638 | 4.398 | 3.933 |
| Total | 16.7 | 16.376 | 16.6 | 14.936 | 16.5 | 15.225 |
| 2021 | 2022 | 2023 | ||||
| Target | Performance | Target | Performance | Target | Performance | |
| Working blackout | 0.064 | 0.059 | 0.064 | 0.057 | 0.065 | 0.056 |
| Outage blackout | 0.196 | 0.174 | 0.196 | 0.124 | 0.195 | 0.130 |
| Total | 0.26 | 0.233 | 0.26 | 0.181 | 0.26 | 0.186 |
Line Loss Rate from 2021 to 2023
