CHINA LONGYUAN(HK:00916) Yang Shi Wang·2025-12-25 05:02Core Viewpoint - The Zhejiang Tiantai Pumped Storage Power Station, the largest single-unit pumped storage power station in China, has successfully connected its first unit to the grid, marking a significant breakthrough in the field of hydropower equipment and engineering construction in the country [1][3]. Group 1: Project Overview - The total investment for the Zhejiang Tiantai pumped storage project exceeds 10 billion yuan, consisting of an upper reservoir, lower reservoir, water conveyance system, and underground powerhouse, with a total installed capacity of 1.7 million kilowatts from four units, each with a capacity of 425,000 kilowatts [6][9]. - The project is recognized as the largest pumped storage power station initiated during China's 14th Five-Year Plan, achieving power generation during its construction phase [9]. Group 2: Technical Achievements - The construction process has led to multiple technological breakthroughs in areas such as ultra-high head large-capacity units, advanced materials, and intelligent construction [9]. - The power station is expected to provide approximately 1.7 billion kilowatt-hours of clean electricity annually, sufficient to meet the annual electricity needs of a city with a population of 1.6 million [9]. Group 3: Operational Role - The power station will play a crucial role in peak shaving, valley filling, frequency regulation, phase adjustment, energy storage, and emergency backup for the Zhejiang power grid, enhancing the flexible dispatch capability of the East China power grid and ensuring stable operation of the power system [11]. - Pumped storage is considered the most mature and economically viable "giant battery" for the power grid, effectively managing energy supply and demand fluctuations [12][21]. Group 4: Functionality of Pumped Storage - The basic framework of a pumped storage power station involves constructing reservoirs at different elevations, allowing for the conversion of electrical energy into potential energy and vice versa [14]. - During periods of excess electricity generation, such as during peak solar output, the power station utilizes surplus energy to pump water to the upper reservoir, preventing energy waste [16]. - When renewable energy generation decreases, the station switches to power generation mode, releasing stored water to generate electricity, thus ensuring stable electricity supply for residential and industrial use [18][21].