January 22, 2024 - Taipower is actively developing diversified energy sources in response to the international energy transition and the trend toward net zero emissions. Moreover, to enhance grid resilience, Taipower is following up its efforts of installing 20 MW energy storage systems at Tainan's Salt Field Solar PV Farm and the Lu Yuan Substation in Kaohsiung by constructing the Longtan energy storage system. The system, which was inaugurated today, transforms the substation into a storage base with a capacity of 60 MW-three times larger than that of its predecessors. Taipower explained that the energy storage system has fast charge-discharge characteristics, which assist in frequency regulation when integrating renewable energy into the grid. It also complements existing power generation units by immediately providing stable power when sudden power events occur, thereby enhancing power system stability and flexibility.
Taipower held the "Grid Energy Storage for Resilience and Sustainability" Longtan Energy Storage System Inauguration Ceremony today at the Longtan Extra High Voltage Substation. Distinguished guests from various sectors including Taipower President Yao-Ting Wang; Legislative Yuan Member Yu-Ling Lu's office secretary Yu-Ling Fu; Yung-Chih Hsiung, Deputy Director of the Department of Economic Development, Taoyuan; and TECO Electric & Machinery Co. were present at the event to witness the completion of Taipower's largest energy storage system.
Taipower stated that it has collaborated with Taiwan's leading industrial motor manufacturer, TECO Electric & Machinery Co., and the world's largest energy storage system integrator, Fluence, to form an international team. Together, the team has constructed 25 forty-foot energy storage containers at the Longtan Extra High Voltage Substation. The containers utilize over 10,000 lithium battery modules, along with transformers, power regulation systems, and other equipment, creating a 60 MW/80 MWh energy storage system. The system can supply up to 60 MW of power and has a storage capacity of up to 80,000 kWh, which is equivalent to meeting the electricity needs of approximately 8,000 households for an entire day.
Taipower explained that power supply and demand are constantly changing. Not only does Taipower need to adjust power generation to be greater than consumption at all times, it also needs to respond to various situations in real-time, such as sudden peaks in electricity demand during hot weather or decreased solar power generation at sunset, in order to maintain grid frequency and ensure power stability. Moreover, the energy storage system, with its rapid response and energy transfer characteristics, can work together with the existing power generation units, making it a new tool that enhances power grid resilience.
Taipower pointed out that during normal operation, the Longtan energy storage system can adjust the frequency of the power grid system to enhance power supply stability. When facing sudden power events, existing hydropower units can start up quickly-within 10 minutes. However, the energy storage system can respond 1000 times faster, providing immediate rescue in just 0.4 seconds.
Taipower further stated that the Longtan energy storage system has obtained dual certifications in international standards for energy storage: IEC 62933 and IEC 62443-3-3, ensuring that every aspect of safety measures has been checked, including energy storage construction, operational maintenance, and information and communication security. Additionally, the storage containers in Longtan are equipped with over 600 smoke, temperature, and gas sensors, which monitor the operations of the energy storage facility 24 hours a day to ensure the operational stability of the system. In the event of an emergency, the gas fire suppression system inside the containers works in conjunction with a water mist fire protection system connected to a 50-ton water tank outside the containers to promptly eliminate any issues.
In recent years, Taipower has combined its sites with substations as bases for energy storage development. Successively, it has established the Lu Yuan and Longtan energy storage systems. This year, it is expected to complete the Dongshan Extra High Voltage Substation 60 MW energy storage system. To align with the government's goal of 1500 MW overall energy storage installation by 2025, Taipower aims to not only build its own energy storage systems but also to integrate private sector resources through a power trading platform, thereby reaching a target of 1000 MW. The remaining 500 MW will be sourced through collaboration with the private sector using solar photovoltaic installations for energy storage.
Spokesperson: Vice President Chih-Meng Tsai
Contact Number: (02)2366-6271/0958-749-333
E-mail: u910707@taipower.com.tw
Contact Person: Director of the Transmission and Transformation Engineering Department, Han-Hsi Chang
Telephone: (02)2322-9950/0939-309-161
Email: u906444@taipower.com.tw