scope of application

Renewable energy, environment, efficient energy conservation

Technology provider

Rural Electrification Research Institute of the Ministry of Water Resources

Brief description of technology

Box-type self-contained small hydropower station technology assembles the main mechanical and electrical equipment of traditional small hydropower stations in a metal container, and uses a box to replace the power station building. It has a compact structure, small land occupation, short construction time, and low investment., convenient transportation, high degree of automation, and wide applicability. It can use the ecological flow of rivers, reservoirs, etc. to generate electricity. The impact of its construction on the surrounding environment is much smaller than that of conventional hydropower stations. It is a new type. Environmentally friendly small hydropower development model. Its key equipment is: self-contained hydro-generator sets, self-contained control and protection systems, and modified containers.

technical information

This technology is a new small hydropower technology model that assembles traditional electromechanical equipment in a container and replaces the factory building with a box. The installed capacity can reach up to 500kW.

Commercial applications

Box-type self-contained small hydropower technology solves the problem of electricity consumption by isolated power grids in remote areas. Black starts without external power supply can quickly restore power supply after accidents or disasters, ensure power grid safety, and achieve rapid post-disaster reconstruction and social stability. After nearly ten years of research and development and promotion, box-type small hydropower stations have been promoted and applied in nearly ten power stations at home and abroad. Box-type self-contained small hydropower related technologies have been exported to Turkey, Vietnam, Macedonia and other countries, with remarkable economic benefits. Introduction to application demonstration project: 1. Project name: Zhejiang Yuhuan Box-type Hydropower Station Project; Location: Damaiyu, Yuhuan County, Zhejiang Province; Project scale: 1× 320kW; 2. Project name: Yongjia Yantan Hydropower Station, Zhejiang; Location: Yantan Town, Yongjia County, Wenzhou City, Zhejiang Province; Project scale: 2× 320kW; 3. Project name: Turija Box-type Hydropower Station Project, Macedonia; Location: Strumica City, Macedonia; Project scale: 1×120.

Help/support you hope to receive during the technology transfer process

no

equipment investment

Taking the capacity expansion and renovation project of a pilot unit in Zhejiang Province as an example, the total equipment investment using this technology for a 320kW hydro-generator set and its auxiliary equipment is about 700,000 yuan, including 600,000 yuan for box-type self-contained small hydropower station equipment and 100,000 yuan for hydraulic construction. The technical life is approximately 25 years.

Annual operation and maintenance fee

Since this technology can be truly unattended, when the system is running normally, the later operation and maintenance costs are small. It only needs to be regularly replaced and maintained for vulnerable equipment. The annual operation and maintenance costs are expected to be about 30,000 yuan, and the equipment depreciation fee is about 50,000 yuan.

investment recovery period

Also taking the capacity expansion and renovation project of a pilot unit in Zhejiang Province as an example, the total equipment investment using this technology for a 320kW hydro-generator set and its auxiliary equipment is about 700,000 yuan. Based on Zhejiang's average annual power generation hours of 2000 hours and on-grid electricity price of 0.40 yuan per kilowatt-hour, the annual income is approximately 256,000 yuan, and the investment can be recovered in less than 3 years. If it is used in areas such as Guizhou, Yunnan, and Sichuan where annual power generation hours exceed 3000, the payback period will be shorter. Taking the foreign project in Macedonia as an example, the total equipment investment of a 120kW box-type self-contained small hydropower station is about US$110,000. Since the project uses irrigation and urban drinking water supply for power generation, the annual power generation hours can reach 4500 hours. Based on the on-grid electricity price of US$0.08 per kilowatt-hour, the annual revenue is approximately US$43,200. The investment can also be recovered in less than 3 years.

added benefit

If this technology is applied to dam ecological flow power generation, additional power generation benefits can be generated. Moreover, since no personnel on duty are needed, this technology can also effectively save the operating cost of the power station. Each power station is calculated as 4 people on duty in turn. If each person needs a salary of 50,000 yuan per year, the labor cost of a power station using this technology can be saved by approximately 200,000 yuan, with significant additional economic benefits.

comprehensive benefits

Hydropower resources are clean and renewable energy and one of the effective energy sources to reduce carbon emissions and slow down climate warming. Box-type self-contained small hydropower station technology utilizes hydropower resources in small and medium-sized rivers to generate electricity. First, it is suitable for non-electricity areas in remote areas where no large power grids have reached it. It provides reliable and economical green renewable power for the local population without electricity without damaging the environment. Under the circumstances, it provides reliable power supply guarantee for residents 'lives and local economic development, and generates power as a black start power supply without external power supply, which can quickly restore local power grid power supply and ensure the safe and effective operation of local power grids. Achieve rapid reconstruction after power outages and maintain local social stability. Second, this technology uses a water-medium hydraulic control valve instead of the oil medium as the transmission mechanism, which reduces the environmental pollution caused by possible oil leakage. It can be used to discharge ecological flow of rivers. In natural streams, built water systems and transformation power stations, make full use of hydropower resources to generate electricity without causing ecological and environmental pollution. In addition, box-type self-contained small hydropower stations have good load adjustment functions and complement and combine power supply with renewable energy sources such as wind energy and solar energy, which can effectively improve the quality of power supply and promote the popularization and application of new renewable distributed power generation models. Through economic and technological cooperation and promotion and application with the "Belt and Road" countries, it can effectively promote the power supply rate in remote areas without electricity in the corresponding countries, improve environmental damage such as deforestation and vegetation, change the production and lifestyle of local residents, and effectively improve local people's livelihood and economy. level.

Level of impact of obstacles on technology transfer

no

technology maturity

Research on this technology has been carried out since 2004. By analyzing the domestic and foreign needs of box-type self-contained small hydropower station technology, it has researched and developed unique box and unit structure forms to solve the problem of small power station capacity. It has researched and developed box-type power stations. One-click start-up and shutdown system solves cutting-edge issues such as unattended unit, isolated operation and black start. Through the friendly integration of box-type self-contained small hydropower stations with the environment, ecological functions for base-flow power generation have been proposed. It has completed technical research and development, test and testing, demonstration application and technology promotion. The process route is mature, equipment and systems are fully integrated, and the results have been successfully applied in dozens of power stations in Macedonia, Vietnam, Sichuan, Zhejiang and other countries and regions. It has been highly recognized by domestic and foreign customers and achieved objective economic benefits. Among them: "Research on Related Technology of Box-type Self-contained Small Hydropower Stations" won the second prize in Dayu Water Conservancy Science and Technology Progress Award; the water conservancy industry technical standard "Box-type Hydropower Station" SL743 -2016, compiled based on this technology, was officially promulgated in 2016;"Box-type Small Hydropower Station (Technology)" was included in the "2017 Key Promotion Guidance Catalog of Water Conservancy Advanced Practical Technologies" and issued the "Water Conservancy Advanced Practical Technology Promotion Certificate"; Obtained two invention patents, namely "Load-type Rapid Grid Connection Device for Small Hydrogenerator Units" and "A Small Hydrogenerator Station"; Obtained two utility model patents, namely "Box-type Self-contained Small Hydropower Station" and "Electronic Load Regulator for Small Hydrogenerator Units".

technical applicability

The box-type self-contained small hydropower station technology has the characteristics of compact structure, small land occupation, short construction time, saving investment, convenient transportation, and high degree of automation. Its application scope includes: 1. It is suitable for the water head range of 20 to 500m, and the hydropower station below 500kW. The higher the water head, the lower the investment per unit capacity. 2. Suitable for unmanned mode, remote control can be realized for unit start-up and shutdown and load control. 3. It can be used for upgrading conventional power stations or for building new small hydropower stations. 4. It can be connected to the grid for power generation, or it can be used as a power supply for isolated power grids in remote areas. 5. It can be used as ecological flow in rivers, reservoirs, etc. for power generation and water supply.

technical stability

Conventional hydropower stations use factory buildings composed of concrete and steel bars, which is the design model of traditional factory buildings. This technology changes the design method and uses metal boxes instead of reinforced concrete workshops, which greatly reduces the environmental damage and pollution caused by the construction of hydropower station workshops to the surrounding environment. At the same time, through research on tightness, heat dissipation and ventilation effects, stability, etc., the vibration generated during operation of the unit is effectively reduced. The connection between the factory building and the penstock does not produce harmful deformation, and the stability and reliability are good. Due to the adoption of advanced automated monitoring and protection systems and the addition of remote monitoring functions of mobile devices such as mobile phones, this technology can realize manual remote one-click automatic start-up and shutdown, remote setting of power generation, and automatic reporting to remote monitoring equipment when the unit fails. Alarm, the system operation is stable and reliable, with low failure rate, and truly unmanned. Through the optimized configuration of the speed regulating device and the electronic load control device, the output voltage fluctuation value of this technology is ≤±10% and the frequency fluctuation value of this technology is ≤±1Hz when operating in isolation, and the power generation quality is high.

technical safety

This technology adjusts the structure of the unit according to the requirements of the box, changes the huge volume of the conventional water turbine unit, and effectively improves technical safety by adopting unmanned operation. In addition, water medium hydraulic control valves are used to replace oil medium. As a transmission mechanism, environmental pollution caused by possible oil leakage is reduced, and there is no risk of environmental or safety accidents such as secondary pollution and leakage of flammable, explosive and highly toxic substances.

Barriers to technology transfer and promotion

no

intellectual property transfer

This technology was independently developed by the Rural Electrification Research Institute of the Ministry of Water Resources. The intellectual property names and patent numbers such as patents and software copyrights are as follows: "Load-type rapid grid connection device for small hydro-generator units"(ZL201010197777.3)"A small hydro-generator station"(ZL201010198044.1)"Box-type self-contained small hydropower station"(ZL201020244126.0)"Electronic load regulator for small hydro-generator units"(ZL200920112513.6)