System Reliability and Availability
Challenges (GRI 103-1)
Execution (GRI 103-2) (G4-EU1) (G4-EU2) (G4-EU10)
CKPower and its subsidiaries place great emphasis on their invested power plants and have thus introduced advanced technology to ensure power distribution continuity and efficiency as well as put cost management systems in place to achieve competitiveness and eco-friendliness. The Company also focuses on developing knowledge on engineering and efficient resource management among its employees at all levels and encouraging learning and operational system improvement in order to promote the development of innovation that will further enhance operational efficiency as well as contribute to greater system reliability and availability.
CKPower operates three types of power generation and distribution businesses, namely hydroelectric power plants, cogeneration power plants, and solar power plants. The install capacity and net energy of each type are detailed below:
(G4-EU1)
| Types of power plants | Installed capacity (MW) | Net energy produced (MWh) |
|---|---|---|
| Hydroelectric | 1,900 | 7,221,507 |
| Renewable energy (solar energy) | 29 | 20,130 |
| Natural gas | 238 | 1,535,670 |
| Total | 2,167 | 8,777,307 |
Efficiency Improvement and Reduction of Production Losses
CKPower attaches great significance to efficiency improvement and reduction of production losses and thus regularly implements production efficiency improvement plans. In 2020, the Company carried out six projects to enhance machinery efficiency, reduce energy consumption, and decrease waste through effluent recycling, which saved the Company approximately THB 18,409,417 combined.
Adjustment of the Chloride Range of the Cooling Towers in BIC 1
The efficiency improvement and reduction of production losses has been collaboratively developed and planned by the production, maintenance, and safety and environment divisions in order to achieve the annual safety and environmental objectives and goals.
| Control Range | Before the project started July 2017 | Aug-Dec 2017 | after the project started Jan-Dec 2018 | Jan-Dec 2019 | 2020 |
|---|---|---|---|---|---|
| Chloride range | Less than 200 ppm | 350 – 400 ppm | 350 – 400 ppm | 350 – 400 ppm | 350 – 400 ppm |
| Blowdown water | 252,818 m3/year (2016) | Reduced by 33,014.64 m3 | Reduced by 47,014.08 m3 | Reduced by 27,534.08 m3 | Reduced by 9,711.92 m3 |
| Saved expenses | - | THB 1,380,376.80 | THB 3,228,260.30 | THB 2,331,490.75 | THB 2,484,241.70 |
Reliability and Availability of Power Production and Distribution Systems
CKPower recognizes the significance of the reliability and availability of its power production and distribution systems in fostering confidence among its customers. To this end, it focuses on improving the efficiency of its electricity distrubution systems to ensure the stable delivery of electricity to all clients of CKPower and its subsidiaries.
In 2019, the Xayaburi Hydroelectric Power Plants and five solar power projects commenced commercial operations, effectively increasing the installed capacity by 1,291.73 megawatts. This has enabled CKPower to deliver electricity produced from clean alternative energy, strengthened the reliability of its power production and distribution, and helped it meet the increased electricity demand.
Furthermore, the Company has put in place production and distribution control systems with maximum reliability. The Company’s power plants are not only designed by experts and equipped with measuring tools of international standards but are also subject to regular inspection by specialists and maintenance according to detailed schedules throughout their life span.
Crisis Management (G4-EU28) (G4-EU29) (G4-EU30)
As risks and crises can strike anytime and cause disruption to the Company’s production and distribution systems, CKPower has developed crisis management guidelines and implemented a business continuity management policy in both the Company and its subsidiaries. The Company also issues emergency manuals and conducts drills every year to ensure preparedness against unforeseen incidents, such as fires and floods.
| System Interruption | 2017 | 2018 | 2019 | 2020 |
|---|---|---|---|---|
| System Average Interruption Frequency Index :SAIFI* | 0.1 | 0.04 | 0 | 0 |
| System Average Interruption Duration Index :SAIDI* | 19.02 | 32.52 | 0 | 0 |
| Performance indicators | Power plants | Performance | Target 2021 |
|||
|---|---|---|---|---|---|---|
| 2017 | 2018 | 2019 | 2020 | |||
| System availability (%) | NN2 Hydro Plant | 98.12 | 93.11 | 98.15 | 97.13 | 97 |
| Xayaburi Hydro Plant | - | - | 99.58 | 97.88 | 95 | |
| Cogeneration Plant | 97.03 | 97.89 | 95.69 | 96 | 97.78 | |
| Unplanned downtime* (incident) | NN2 Hydro Plant | 4 | 5 | 3 | 2 | 3.5 |
| Xayaburi Hydro Plant | - | - | 6 | 14 | - | |
| Cogeneration Plant | - | - | 2 | 0 | 2 | |
| Revenue loss from unplanned downtime (THB million) | NN2 Hydro Plant | 0.38 | 0.10 | 93 | 0.13 | <1 |
| Xayaburi Hydro Plant | - | - | 0.419 | 21.87 | 22.85 | |
| Cogeneration Plant | - | 2.60 | 3.50 | - | 1.644 | |
1) Xayaburi Hydro Plant COD on 20 October 2019.
2) BIC2 COD on 29 June 2017.
3) NN2 Hydroelectric Power Plant was penalized due to water supply limitations in June and July 2019 according to the PPA condition, although the machine remained available.
4) Xayaburi Hydro Plant has 8 turbines, 7 for EGAT and 1for EDL. However, the one turbine for EDL ceased its operation in 2020 (but still regularly maintained). To reflect the real performance, availability, and reliability in 2020, the data of the 7 remainng turbines is shown in this report.
Performance on Production Reliability and Availability in 2020 (GRI 103-3)
| Reliability of the distribution system: 97% | Unplanned downtime: 16 incidents | Lost revenue due to unplanned downtime: THB 22 million |
|---|---|---|
| System interruption: 0 incident | ||