CAJ | 학술논문

该文模拟云层遮阴导致大型光伏发电系统辐照强度空间分布不均的情形，在考虑太阳辐射随时间变化的同时重点分析了因云层移动导致的太阳辐射空间分布的随机性和不确定性。首先计算任意地点任意时刻的天文辐射强度，依次考虑大气层衰减、电站所在区域的云层的动态影响，计算到达水平地面的辐照强度，最终得到光伏组件倾斜面上的辐照强度。该模型考虑了地形地貌对日出日落时间的影响、云层分布特性及其和天气的相关性、不同类型的云层透光率、“云隙效应”、云层重叠及云层边缘效应，并能以较高时间分辨率进行仿真计算。由于综合考虑了辐照强度的确定性和随机性部分，该模型对研究光伏发电系统暂稳态分析、实时控制及并网光伏发电对电网的影响具有参考意义。
해문모의운층차음도치대형광복발전계통복조강도공간분포불균적정형，재고필태양복사수시간변화적동시중점분석료인운층이동도치적태양복사공간분포적수궤성화불학정성。수선계산임의지점임의시각적천문복사강도，의차고필대기층쇠감、전참소재구역적운층적동태영향，계산도체수평지면적복조강도，최종득도광복조건경사면상적복조강도。해모형고필료지형지모대일출일락시간적영향、운층분포특성급기화천기적상관성、불동류형적운층투광솔、“운극효응”、운층중첩급운층변연효응，병능이교고시간분변솔진행방진계산。유우종합고필료복조강도적학정성화수궤성부분，해모형대연구광복발전계통잠은태분석、실시공제급병망광복발전대전망적영향구유삼고의의。
This paper proposed a model to describe solar irradiance temporal/spatial distribution considering cloud shadows for large-scale photovoltaic (PV) generation. The irradiance time series is calculated focusing on its randomness and uncertainty caused by cloud shadow movement. The irradiance reached the titled PV panel is calculated considering astronomical irradiance, atmospheric attenuation and the impact of transient cloud shadows. This model illustrates the geography impact on the sunrise and sunset time, correlation between cloud and weather type, cloud shadow model considering diversity cloud type transparency , “cloud effect”, cloud overlapping and cloud edge effect. The developed model can be used to analyze PV generation steady and transient performance, real time control and large PV plant integration impact on grid.