光伏并网点电压调节案例教学研究

Case teaching study on voltage regulation of photovoltaic grid-connected points

针对目前光伏电源接入配电网带来的电压越限问题,文章首先对该问题进行了机理分析,提出了有功/无功控制方案,又基于PSCAD/EMTDC搭建了光伏发电系统仿真实验平台,并通过所设计的具体案例,使学生在该平台上观察光伏并网点电压越限现象,利用有功/无功控制制定无功单独调压、有功/无功综合调压和改进的有功/无功综合调压策略,并根据这些策略进行电压调节实验。案例教学法有利于学生深入理解理论知识、熟练掌握实践技能,进而提高分析问题和解决问题的能力。

In view of the problem of voltage beyond limit caused by photovoltaic power connected to distribution network,this paper first analyzes the mechanism of the problem,and puts forward the active/reactive power control scheme.Based on PSCAD/EMTDC,a simulation experiment platform of photovoltaic power generation system is built.Through the specific cases designed,the students can observe the phenomenon of voltage beyond limit at the photovoltaic grid-connected points.The active/reactive power control is used to formulate the independent reactive power voltage regulation,active/reactive power comprehensive voltage regulation and improved active/reactive power comprehensive voltage regulation strategies.According to these strategies,voltage regulation experiments are carried out.Case teaching method is conducive to students’deep understanding of theoretical knowledge and mastery of practical skills,thus improving their ability to analyze and solve problems.