Since the expander is unable to always work at the corresponding maximum efficiency point under varying working conditions in the traditional compressed air energy storage expansion power generation system,a maximum efficiency tracking control strategy for the expansion power generation system is designed.The strategy is mainly based on similarity theory so that the expander can operate in the optimal performance at any time to achieve the purpose of saving energy.When the demand power on the grid sides changes,the expansion machine inlet flow and expansion ratio can be calculated based on the similarity theory,and then the optimal reference speed can be obtained.Meanwhile,the generator tracks the speed under the control of the machine-side converter to realize the efficient operation of the system.A simulation model is built for the system,and the results show that the expander can work at the highest efficiency point under different power requirements by using the proposed control strategy.
关键词
压缩空气储能/膨胀发电系统/相似理论/仿真建模/效率最高点
Key words
compressed air energy storage/expansion power generation system/similarity theory/simulation modeling/maximum efficiency point
维普
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