A Stable Power Supply and Installed Capacity
In recent years, Taiwan's electricity consumption has repeatedly hit record highs. To ensure the stability of the power supply, Taipower promotes power development plans, and brings new generating units online. In terms of managing the operation of thermal power generating units, apart from refining various operational maintenance strategies, Taipower has also established a licensing system and a retraining mechanism for staff to ensure the stability of daily operations. Additionally, the main management measures for nuclear power units include analyzing and reviewing the operational weaknesses of each nuclear power plant, strengthening management of operations during overhauls, improving and renewing equipment, as well as reviewing unplanned events in the current year
Total Amount and Composition of Power Generation from 2020 - 2022
| 2020 | 2021 | 2022 | ||||
| Billion kWh | Percentage | Billion kWh | Percentage | Billion kWh | Percentage | |
| Net amount of power generation and purchase | 238.9 | 100.0% | 248.8 | 100.0% | 250.7 | 100.0% |
| Amount of power generated | 183.9 | 77.0% | 189.1 | 76.0% | 188.3 | 75.1% |
 Pumped storage hydro |
3.1 | 1.3% | 3.2 | 1.3% | 3.1 | 1.2% |
 Thermal |
147.0 | 61.5% | 155.2 | 62.4% | 156.0 | 62.2% |
 Nuclear |
30.3 | 12.7% | 26.8 | 10.8% | 22.9 | 9.1% |
 Renewable energy |
3.4 | 1.4% | 3.9 | 1.6% | 6.3 | 2.5% |
| Amount of purchased power | 55.1 | 23.0% | 59.7 | 24.0% | 62.5 | 24.9% |
| Privately-owned thermal |
40.6 | 17.0% | 42.7 | 17.1% | 43.7 | 17.4% |
| Renewable energy |
10.4 | 4.3% | 11.9 | 4.8% | 15.3 | 6.1% |
 Cogeneration |
4.1 | 1.7% | 5.1 | 2.1% | 3.4 | 1.4% |
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
- In response to the future electricity market transaction mechanism of the Electricity Act, regular on-the-job training is carried out to establish the concept of electricity market operation and quotations for business personnel.
- 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
Ultimate Response Guideline
Ultimate Response Guidelines (URG) were developed as a basis for decision making and are based on current design benchmarks for earthquake resistance and tsunami prevention in nuclear power plants, emergency operating procedures and the severe nuclear outage handling guidelines.
Strengthening the Infrastructure of the Power Grid
The grid is a connective hub between the power generator and the customer. A sound power grid can effectively reduce the possibility of power outages and maintain the quality of the power supply. Over the years, Taipower has built a dense network around the country to ensure that people are able to use electricity conveniently. Regular maintenance of related facilities is also an important part of a stable power supply. Taipower will continue to promote plans that increase the power grid's resilience and replace old facilities and lines. The Company will also promote grid projects in a timely manner to maintain a high-quality supply of electricity.
Taipower’s current uses the System Average Interruption Duration Index (SAIDI) and the System Average Interruption Frequency Index (SAIFI) as performance indicators for power supply reliability. In March 2022, the 303 power outage incidents affected the power supply to 5.529 million households and caused the SAIDI score to increase to 91.285 minutes/household, and the SAIFI score to increase to 0.467 times/household. However, if this incident is excluded, the SAIDI score was 14.936 minutes/household, and the SAIFI score was 0.185 times/household.
Additionally, as intermittent renewable power, which may affect system stability, is added to the grid in greater quantities, Taipower is devoted to grid-connection dispatching and strategy research. As such, the Company has built a generation information consolidation platform and other related systems to help it actively respond to future challenges.
In consideration of expected global climate changes, the unstable nature of renewables which are likely to cause an imbalance between supply and demand, and the aging of existing power transmission and distribution facilities, the entire system of power generation, transmission and distribution should continue to undertake various prevention and system improvement measures. Consequently, Taipower will constantly strengthen line maintenance and equipment improvements to reduce outages and to ensure power supply quality.
Power Supply Reliability Results from 2020 to 2022
System Average Interruption Duration Index
System Average Interruption Frequency Index
| 2020 | 2021 | 2022 | ||||
| Target | Performance | Target | Performance | Target | Performance | |
| Work blackout | 12.253 | 11.696 | 12.213 | 11.732 | 12.176 | 11.298 |
| Outage blackout | 4.547 | 4.235 | 4.487 | 4.644 | 4.424 | 3.638 |
| Total | 16.8 | 15.931 | 16.7 | 16.376 | 16.6 | 14.936 |
| 2020 | 2021 | 2022 | ||||
| Target | Performance | Target | Performance | Target | Performance | |
| Work blackout | 0.064 | 0.059 | 0.064 | 0.059 | 0.064 | 0.057 |
| Outage blackout | 0.196 | 0.171 | 0.196 | 0.174 | 0.196 | 0.129 |
| Total | 0.260 | 0.230 | 0.26 | 0.233 | 0.26 | 0.185 |
Line Loss Rate from 2020 to 2022
