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Due to the inherent instabilities and instability of renewable energy such as wind energy and solar energy, the power generated by these two kinds of renewable energy power stations also has intermittent and unstable problems, leading to a large number of problems of “discarding wind and abandoning lightâ€. Compressed air energy storage systems can “splice†intermittent renewable energy sources to compensate for the poor continuity of operation and unstable power output of renewable energy power plants, ultimately achieving stable output, and providing for the large-scale utilization of renewable energy sources. Effective solution.
In order to further understand the coupling characteristics of renewable energy and compressed air energy storage systems such as wind energy and solar energy, the R&D Center for Energy Storage of the Institute of Engineering Thermophysics of the Chinese Academy of Sciences relies on the national "863" key project to develop and demonstrate key technologies for megawatt-class physical energy storage. "And the repair project "Comprehensive measurement and detection platform for large-scale energy storage technologies" proposed and built a renewable energy simulation system to simulate actual unstable renewable energy sources, and studied the coupling of renewable energy sources and compressed air energy storage systems. characteristic.
The research of the renewable energy simulation system mainly focuses on the testing and testing of the compressed air energy storage control system. Based on the power output characteristics of the renewable energy power station, a set of reasonable electrical energy simulation and operation control systems have been established so that the energy storage system can exert itself efficiently. The energy storage function maximizes the economic and technological benefits of joint operations. The principle is as shown in the figure below. It uses the analog system to reproduce the real operating environment of typical renewable energy grids such as voltage/frequency fluctuation and intermittent power supply in the laboratory to provide energy for the energy storage system. At the same time, according to the grid load and the power difference calculation result of the compressor components, the compressor controller and the inverter are used to control the compressor load in real time to realize the storage and utilization of unstable electrical energy.
At present, the renewable energy simulation system has completed the construction of an integrated experimental platform for 1.5MW advanced compressed air energy storage system in the R&D center of energy storage, has reached the design targets, and has conducted relevant experimental research work.
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