The new energy storage system adds power for renewable energy! In response to international energy transitions and net-zero emission trends, Taipower is actively developing diverse energy solutions. To strengthen grid resilience, Taipower previously implemented a 20-MW energy storage system at the Tainan Salt Fields Solar Farm and the Kaohsiung Luyuan Substation, as well as a 60-MW energy storage system at the Longtan Extra-High Voltage (EHV) Substation earlier this year. Now, Taipower has launched another heavyweight 60-MW energy storage system at the Dongshan site in Yilan. At the November 20 inauguration ceremony, Taipower representatives highlighted that energy storage systems, with their rapid charging and discharging capabilities, can support frequency regulation when integrating renewable energy into the grid. Moreover, they provide immediate stable power during unexpected power events to enhance the stability and flexibility of the power system.

On November 20, Taipower held the Sustainable Energy Storage, Stable Grid inauguration ceremony for the Dongshan Energy Storage System at the Dongshan EHV Substation in Yilan. The event was attended by distinguished guests, including Taipower Vice President Hsiao Sheng-Jen, Tatung Group President Brian Shen, and Tatung Forever Energy President Huang Yun-Wei, who jointly witnessed the milestone.
This project was the result of a collaboration between Taipower and Tatung Forever Energy, a pioneering enterprise in domestic energy storage applications. Leveraging Tatung Group's expertise and resources in the power and energy sector, the two companies established 23 energy storage containers at the Dongshan EHV Substation, covering an area of approximately 1,600 pings (about 5,300 square meters). The resulting 60-MW/85-MWh energy storage system has a storage capacity of 85,000 kWh, which is sufficient to meet the electricity needs of approximately 8,000 households for an entire day.

Due to their ability to transfer energy and respond rapidly, energy storage systems have become a powerful new tool for enhancing grid resilience. The Dongshan energy storage system utilizes Enhanced Dynamic Regulation (E-dReg) technology, which enables energy transfer. It stores abundant solar energy generated during the day and discharges it in the evening when sunlight diminishes rapidly, playing a vital role in stabilizing the power supply during nighttime peak demand. In the event of unexpected power incidents that cause a drop in grid frequency, the system can respond quickly, completing discharge within 0.4 seconds to maintain grid frequency stability. It also provides multiple functions, including stable power supply and voltage regulation.

Power systems have three key indicators: frequency, voltage, and inertia. Among these, inertia varies depending on the method and characteristics of power generation, and its importance has grown due to the current trend of renewable energy development. In traditional systems, inertia is primarily provided by the rotational motion of conventional generators' steam or hydropower-driven rotors. Conversely, renewable energy systems convert sunlight and wind directly into electricity through inverters. Therefore, last year, Taipower collaborated with UK-based innovative energy technology company RTL on a real-time inertia measurement project for the power system. Measurement devices were installed at 10 locations nationwide. Furthermore, Taipower has introduced Function of Periodic Power Modulation (FPPM) technology at the Dongshan energy storage system, making it the only energy storage system in Taiwan capable of measuring system inertia. By inputting test signals into the grid and obtaining real-time feedback data, this system provides valuable insights for power dispatching and system stability management.

In terms of safety, the Dongshan Energy Storage System has obtained dual certifications: the international energy storage safety standard IEC 62933-5-2 and the international industrial control cybersecurity standard IEC 62443-3-3. Certificates were issued by an international third-party verification agency, ensuring strict compliance across various aspects, including energy storage installation, operation and maintenance, and information and communication security. Moreover, the Dongshan Energy Storage System incorporates a four-stage safety framework aimed at achieving zero risk and zero disaster. These measures include gas detection and ventilation, abnormal temperature alarms, an internal cabinet fire suppression system, and an external fire-fighting water mist system, ensuring comprehensive safety management.

A Taipower representative stated that the government's 2025 goal of establishing 1,500 MW of energy storage includes 500 MW from private developers integrating energy storage with photovoltaic power, 160 MW of energy storage systems built by Taipower, and an additional 1,000 MW from private resources aggregated through the Energy Trading Platform. In recent years, Taipower has utilized its substations as development bases for energy storage. Projects such as the Luyuan and Longtan energy storage systems have been completed, and with the Dongshan energy storage system now online and integrated into the grid, Taipower has officially achieved a milestone in its self-built energy storage initiatives.

Spokesperson: Vice President Tsai Chih-Meng
Phone: (02) 2366-6271; 0958-749-333
E-mail: u910707@taipower.com.tw

Contact Person: Director of Transmission and Substation Engineering Department Chang Han-Hsi
Phone: (02) 2322-9700; 0965-598-258
E-mail: u906444@taipower.com.tw