CAJ | 학술논문

把光伏电池电路模型的离散计算结果作为基准数据源,利用数值计算方法实现对光伏阵列及各光伏单元的建模,详细阐述了该建模方法的实现机理及数学模型表达。针对光伏阵列运行中常遇到的阴影遮挡工况,建立了不同规模(单体光伏电池、组件、组串、阵列)的遮挡模型,并给出仿真结果。结果表明：在不同遮挡率下,单体光伏电池、组件的 I-V 输出特性曲线只有一个阶梯,P-V输出特性曲线仅有一个功率峰值；组串 I-V 输出特性曲线阶梯个数等于组件不同遮挡率个数,P-V输出特性曲线功率峰值个数不大于阶梯个数,并验证了两者之间的确切关系；光伏阵列的功率峰值个数与各组串的峰值个数关系复杂。该模型可适用于不同规模光伏阵列,仿真灵活,也容易与电力电子回路集成实现系统级仿真。
파광복전지전로모형적리산계산결과작위기준수거원,이용수치계산방법실현대광복진렬급각광복단원적건모,상세천술료해건모방법적실현궤리급수학모형표체。침대광복진렬운행중상우도적음영차당공황,건립료불동규모(단체광복전지、조건、조천、진렬)적차당모형,병급출방진결과。결과표명：재불동차당솔하,단체광복전지、조건적 I-V 수출특성곡선지유일개계제,P-V수출특성곡선부유일개공솔봉치；조천 I-V 수출특성곡선계제개수등우조건불동차당솔개수,P-V수출특성곡선공솔봉치개수불대우계제개수,병험증료량자지간적학절관계；광복진렬적공솔봉치개수여각조천적봉치개수관계복잡。해모형가괄용우불동규모광복진렬,방진령활,야용역여전력전자회로집성실현계통급방진。
A numerical modeling method of photovoltaic (PV) arrays and PV units is proposed.The method uses the discrete calculation results of PV cell circuit model as the basic data sources.The implementation mechanism of the method and the mathematical model are given in detail.In order to study the shadow shade conditions in PV array operations,shading models of different sizes (single photovoltaic cell,module,string,and array)are developed with simulation results.The results show that under different shading rates,the I-V output characteristic curve of a single PV cell or a module has only one step,and the P-V output characteristic curve has only one power peak.The step number of string”s I-V output characteristic curve is equal to the number of module”s different shading rates,but the power peak number is no more than the step number.The numerical relationship is tested as well.The relationship between the power peak number of PV array and the power peak number of each string is complex.The model is suitable for PV array with different scales and has good simulation flexibility. It can also be easily integrated with power electronic circuits to execute system simulations.