Providing Quality Electricity Service-Provider of Sustainable Power-ESG Development Profiles-Taipower Sustainability Section - Taiwan Power Company

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Providing Quality Electricity Service

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 continuously strengthens its management, promotes power development plans, and brings new generating units online. In terms of managing the operation of thermal power generating units and 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

A Stable Power Supply and Installed Capacity

Total Amount and Composition of Power Generation from 2018 to 2020

 
2018 2019 2020
Billion kWh Percentage Billion kWh Percentage Billion kWh Percentage
Net amount of power generation and purchase 2,333 100.0% 2,325 100.0% 2,389 100.0%
Amount of power generated 1,827 78.3% 1,804 77.6% 1,839 77.0%
Pumped storage hydro 34 1.4% 32 1.4% 31 1.3%
Thermal 1,483 63.6% 1,406 60.5% 1,470 61.5%
Nuclear 267 11.4% 311 13.4% 303 12.7%
Renewable energy 43 1.9% 55 2.4% 34 1.4%
Amount of purchased power 506 21.7% 520 22.4% 551 23.0%
Privately-owned thermal 389 16.7% 394 16.9% 406 17.0%
Renewable energy 71 3.0% 85 3.7% 104 4.3%
Cogeneration 46 2.0% 41 1.8% 41 1.7%

Power Dispatch and Reliability Management Mechanism

Regular Review and Analysis

Regular Review and Analysis

  • Conduct regular electromechanical system incident review meetings
  • Conduct regular power dispatch system incident review meetings
Risk Management Implementation

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

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 performance indicators of power supply reliability are the System Average Interruption Duration Index (SAIDI) and the System Average Interruption Frequency Index (SAIFI). In 2020, the SAIDI was 15.931 minutes/household, and the SAIFI was 0.230 times/household. Over the past decade, Taipower has continued to show stable performance in terms of outage duration and number of outages. This has greatly contributed to the quality of power supply, customer service, and corporate image. Nevertheless, considering the extreme global climate changes of the future, the unstable nature of renewables which is 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 reinforce various prevention and system improvement measures. Taipower will constantly strengthen line maintenance and equipment improvement to reduce blackout outages and to ensure power supply quality.

Power Supply Reliability Results from 2018 to 2020

 
System Average Interruption Duration Index
System Average Interruption Frequency Index
2018 2019 2020
Target Performance Target Performance Target Performance
Work blackout 12.518 12.052 12.481 12.125 12.253 11.696
Outage blackout 4.7120 4.1351 4.619 4.363 4.547 4.235
Total 17.23 16.187 17.1 16.488 16.8 15.931
2018 2019 2020
Target Performance Target Performance Target Performance
Work blackout 0.063 0.057 0.064 0.059 0.064 0.059
Outage blackout 0.207 0.170 0.206 0.150 0.196 0.171
Total 0.270 0.227 0.270 0.209 0.260 0.230

Line Loss Rate from 2018 to 2020

 
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