Institute of Electrical Engineering,Chinese Academy of Sciences
Publication
 

Publication


Renewable Energy Resources
  Date:2009-07-22    
 
Renewable Energy Resources Power Generating Technology
In late 1970s, the institute initiated the R&D of renewable energy resources power generating technology prior to the others. It contributed a lot to our nation in the R&D of stand-alone and grid-connected PV power station, and the research and model projects of variable-speed constant-frequency wind power  system, independent wind power system and wind-diesel and wind-solar complementary power system. As to this point, it is always in the leading position in the country. The institute installed Tibet Shuang hu 25kW PV power station, Ando 100kW PV power station, Bange 70kW PV power station and Nima 40kW PV power station. Besides, it successfully developed the 5mф-type vertical-shaft wind power assembly, 3×4kW variable-speed constant-frequency wind power assembly, 20kW variable-speed constantfrequency wind power assembly, 30kW wind-solar complementary united power station, single electrical control system and centralized remote supervisory & control system of 600kW wind power station, and groove type solar mid/high-temperature heat application system. All of these achievements have been applied in the industrial fields successfully and won several scientific & technological progress awards issued by CAS. The R&D Center is in possession of such devices as the international standard electricity test system for PV module components and simulated environment experiment system for solar PV module components. The core tasks of the center are to meet the state's important strategic needs, to research on and develop the renewable energy power generating technology, key equipment and related test technologies, and to boost the formation of renewable energy power generating industry in our country. The ongoing scientific researches include: the electrical control system of large grid-connected wind power generation assembly, the electrical control and power conversion system of MW-level variable-speed constantfrequency wind power generation assembly, 50kW grid-connected PVpower generation technology, the industrialization of electrical control system of 600kW wind power generation assembly and the research & construction of small PV power station.
Founded in 1999, the Quality Test Center of CAS for Solar PV Power System and Wind Power System is subordinated to the institute. It is mainly engaged in the quality test and evaluation of PV system/components and wind power system/components. The Quality Test Center plans to build four laboratories successively, i.e. Sino-Japan Cooperative Solar PV cells Test Laboratory, Solar PV System Test Laboratory, Wind Power Component Test Laboratory and Wind Power System Test Laboratory, and a Training & Communication Department. The Sino-Japan Cooperative Solar PV cells Test Laboratory was completed in Aug. 1999. Its major test equipmens were donated by Japan's NEDO and their accuracy and performance reach the international standards. This laboratory has the ability to evaluate the quality of PV cells and its modules fully in accordance with IEC Standards. Particularly in 2000, it rewarded the test mission of 1st phase of China's Brightness Program, and it also provides Chinese domestic PV components manufacturers withtechnicalservices.
 The laboratory has been admitted by China Metrology Accreditation for Certificate of product Quality(authorized by National Bureau of quality supervision) in September 2001.
 
New Thermo-electric Power Generating Technology
New thermo-electric power generating technology is a long-term research subject in the Institute, while the Research Team is mainly engaged in the exploitation and research of new low-cost, high efficient and non-contamination power generating methods, and offers new theories and technologies to improve the availability of energy resources and to form the new future layout of the integration of large power system and the development of scattered power supply. The research team has  undertaken a long-term efforts to the research and exploitation on MHD power generating technologies, as a result, it gained 6 scientific & technological achievements, 8 national patents and many CAS Natural Science Awards, Scientific & Technological Progress Awards and Important Scientific & Technological Achievements Awards. Since 1990s,  it has carried out the application and research of Sodium Heating Direct Power Generating Technology, enabling the single-tube experiment devices to generate power continuously for 7 hours, with max. output of 8.85W, and the power density up to 0.7W/cm2 at the electrode area, which is equivalent to the advanced international level. Apart from these, the research team developed practical test components of electromagnetic pump circulation, and is a domestic leader in the researches on some key technologies such as high-temperature activated brazing and porous film electrode preparation. The team is equipped with the vacuum brazing furnace, micro-arc welding machine, rotating-arc ionic plating and magnetic control sputtering multi-function film plating machine for developing sodium heating device. As one of the application orientations of sodium heating device, the research on focusing solar power generation has been carried out. The team also builds a  focusing lens tracking control experimental  bench  and independently develops the tracking control devices and software. Besides, it also accomplished the  focusing and tracking experiments of disc type focusing lens with the apertare diameter of 1.8m and 2.5m respectively, with core temperature at the focal spot up to 1800, thus providing good conditions for the comprehensive experiments of power system.  The  main  ongoing tasks include the development of sodium heating direct power generating devices, the research on disc focusing solar heat-Sterling power generating technology (a project of the state's 863 Plan) and the exploitation of new conceptual MHD power generating technology.