On September 15, the commencement ceremony of the preparatory project for Zhejiang Jiande Pumped Storage Power Station with a total installed capacity of 2.4 million kilowatts was held in Meicheng Town, Jiande City, Hangzhou, which is the largest pumped storage power station under construction in East China. Three months ago, all six units of Changlongshan Pumped Storage Power Station with a total installed capacity of 2.1 million kilowatts were just put into operation in Anji County, Huzhou City, 170 kilometers away.
At present, Zhejiang Province has the largest number of pumped storage projects in China. There are 5 pumped storage power stations in operation, 7 projects under construction, and more than 20 projects in the planning, site selection and construction stage.
“Zhejiang is a province with small energy resources, but also a province with large energy consumption. It has always been under great pressure to ensure energy security and supply. In recent years, under the background of ‘dual carbon’, it is urgent to build a new power system with a gradually increasing proportion of new energy, which puts more pressure on peak shaving. The pumped storage power stations that have been built, are under construction and planned in Zhejiang can play an important role in peak shaving, valley filling, frequency modulation, etc. for Zhejiang and even East China power grids, and can also play a role in wind power, wind power Photovoltaic power generation and other new energy sources are combined to achieve multi energy complementation and transform ‘garbage electricity’ into ‘high-quality electricity’. ” On September 23, Han Gang, an engineer of the Energy and Environment Research Institute of Zhejiang Development Planning Research Institute, told the surging news.
The cost-effective business of “4 kilowatt hour electricity for 3 kilowatt hour electricity”
Power is generated and used immediately, and cannot be stored in the power grid. In the past, in the power grid system dominated by thermal power and hydropower generation, the traditional way is to constantly build power generation facilities to meet the needs of the growth of power load, and shut down a large number of generator units when power consumption is low to save energy. Therefore, it will also increase the difficulty of power regulation and bring hidden dangers to the stability and security of the power grid.
In the 1980s, with the rapid economic development of the Yangtze River Delta region, the demand for electricity increased sharply. In the East China power grid, which is dominated by thermal power, it had to pull the switch to limit power at the peak load and reduce the output of thermal power generator units (the output power within a unit time) at the low load. In this context, East China Power Grid decided to build a large capacity pumped storage power station. Experts have searched for 50 sites of pumped storage power stations in Zhejiang, Jiangsu and Anhui. After repeated analysis, demonstration and comparison, the site is located in Tianhuangping, Anji, Huzhou to build the first pumped storage power station in East China.
In 1986, the generating units of Tianhuangping Pumped Storage Power Station were prepared by East China Survey and Design Institute and the Feasibility Study Report of Zhejiang Tianhuangping Pumped Storage Power Station was completed. In 1992, the Tianhuangping Pumped Storage Power Station project was started, and construction was officially started in March 1994. In December 2000, all six units were put into operation for power generation, with a total installed capacity of 1.8 million kilowatts. The entire construction period lasted eight years. Jiang Feng, Deputy General Manager of East China Tianhuangping Pumped Storage Co., Ltd., has worked in Tianhuangping Pumped Storage Power Station for 27 years since 1995. He introduced: “Pumped storage power station is mainly composed of upper reservoir, lower reservoir, transmission pipeline and reversible pump turbine. Pumped storage power station is to use the residual power in the low load period of the power system to pump water from the lower reservoir to the upper reservoir to store surplus power, and to release water from the upper reservoir to the lower reservoir for power generation when the power consumption peak or the system needs flexible regulation, so as to provide peak power and auxiliary services for the power system. At the same time, the unit is pumping and generating During the power production process, various forms of work condition conversion can be carried out, and flexible adjustment services can be provided according to the system needs to achieve safe and stable operation of the system and efficient utilization of energy resources. “
“In the process of energy conversion, there will be a certain proportion of power loss. The energy efficiency conversion rate of Tianhuangping Pumped Storage Power Station is as high as about 80% due to geographical conditions and other reasons. However, the overall conversion rate of large-scale pumped storage power stations is about 75%, which is equivalent to 4 kilowatt hours for 3 kilowatt hours. It seems that it is not cost-effective, but pumped storage is indeed the most mature technology, the best economy, and the most large-scale development conditions of green, low-carbon, clean and flexible power supply. ”Jiang Feng told the surging news.
Tianhuangping Pumped Storage Power Station is a typical case of regional cooperation in the Yangtze River Delta. Because of the large investment in the construction of the power station, Shanghai, Jiangsu Province, Zhejiang Province and Anhui Province signed the Agreement on Raising Funds for the Construction of Tianhuangping Pumped Storage Power Station to jointly invest in the construction. After the power station is completed and put into operation, cross provincial cooperation has been implemented all the time. The provincial and municipal power grids will obtain electric power according to the proportion of investment at that time and provide corresponding pumped electric power. After the completion and operation of Tianhuangping Hydropower Station, it has effectively promoted the consumption of new energy in East China, improved the performance of power grid system, and reliably guaranteed the security of East China power grid.
Post time: Nov-09-2022
