孟彦京,刘青

• 1:陕西科技大学

摘要(Abstract)：

光伏发电在实际应用中用户端的负载是不断变化的,当一台变压器下有多个用户且只有单个用户使用光伏时,如果光伏输出电流大于负载消耗时,会发生逆流现象,这种现象不利于同一变压器下各个用户之间电费的结算。为了解决这一问题,通过S7-200PLC设计一套自动切换系统,采集负载端的电流信号,根据电流变化情况通过PLC控制并网逆变器的输出负载对象,最终达到了光伏并网逆变器和负载之间的最佳匹配,消除逆流现象,便于用户之间电费的结算。此系统正式投入使用以来一直处于正常运行状态,并且达到了预期的效果。

关键词(KeyWords)： 光伏发电;PLC控制;负载消耗;自动切换;消除逆流;并网逆变器

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51577110)~~

作者(Author): 孟彦京,刘青

DOI: 10.16652/j.issn.1004-373x.2018.02.027

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