针对独立光伏发电系统中最大功率点跟踪(MPPT)控制策略与蓄电池充电管理相冲突的问题，将超级电容器应用于光伏系统中，与蓄电池一起构成混合储能系统。根据其性能特点，将恒定电压法与自适应变步长电导增量法相结合．提出了改进型MPPT策略。仿真及实验结果表明，改进的方法能够快速、稳定及准确地找到最大功率点。
2021-08-27 14:37:19
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汽车享有“第一商品”的美誉，因为，汽车工业的发展，可以带动众多产业发展。一辆轿车的零部件数以万计，附加值很高，一辆车背后是一系列的产业。因此，汽车工业也就成为了衡量一个国家工业化水平和综合科技水平的重要标志。
我国的汽车工业水平落后先进国家，短时间内在内燃机领域是不可能消除差距的，中国大规模发展燃油车动力汽车，在环境、资源、技术等方面面临严重压力，所以，从国内的资源和环境条件，也要求中国在未来的汽车工业必须探索新的思路。
随着我国国民经济持续高速发展，轿车成为我国居民消费的主要商品之一，我国汽车工业也将迎来一个快速发展的机遇，发展燃油车，会依赖石油资源需求的激增，同时会造成对环境、环保的负面影响，电动汽车恰好避免或者减少这些不利因素。
2021-08-27 12:56:01
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Abstract —— In order to improve adaptability for wind power gridconnected converter under non-ideal grid conditions and reduce the harmonic influence, harmonic suppression mechanism for grid-connected converter is depth analyzed and harmonic suppression method and theory is derived. Be limited by complexity of the control system, compound control strategy composed by repetitive controller paralleled with PI controller is proposed for grid-connected converters control in this paper. System stability is analyzed, Geometric representation for repetitive controller stability is shown in figure and Control system difference equation is deduced. Using the proposed control strategy, no difference tracking current control is achieved in the fundamental positive sequence reference frame. The gird current harmonic can be effectively reduced and the
converter grid adaptability is improved. The simulation and experimental results verified the effectiveness of the proposed control strategy.
2021-08-26 14:08:24
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