并网光伏发电系统雷电灾害风险评估研究

Study on Risk Assessment for Lightning Hazard of Grid-connected Photovoltaic Power System

针对并网光伏发电系统大面积的露天发电区域、密集的汇流线路及高度敏感的控制、逆变设备,借助于现有的雷电灾害风险评估理论、规范,在深入研究并网光伏发电系统损害源、损害类型及损失程度影响因素的基础上,提出了科学、可行的并网光伏发电系统雷电灾害风险评估方法。评估中,针对并网光伏发电系统不同区域等效截收面积互相重叠,发电组件直击雷防护等级不明确等问题,根据电气-几何模型,应用作图法,给出了定量解决方法。

According to large areas of open-pit power generation regions,intensive confluence lines and highly sensitive control,countercurrent equipment,by means of the existing theory and standard of risk assessment for lightning hazard,the method of risk assessment is put forward for lightning hazard of grid-connected photovoltaic power system scientific and feasible on the basis of further researching damage source,damage type and influencing factors of damage degree. In the assessment,according to the problem of grid-connected photovoltaic power system determination of the collection area overlap in different areas and the ambiguity of direct stroke protection level,the quantitative solving methods by the plotting method based on electro-geometrical model is given.