温度修正对光伏发电系统性能比影响分析
Analysis of temperature correction influence on performance ratio of photovoltaic system
杨磊 1周凯旋 1贺凯 1刘海涛1
作者信息
- 1. 中国科学院电工研究所,北京 100190
- 折叠
摘要
现阶段光伏电站通过系统性能比(Performance Ratio,PR)对其发电性能进行评价.在实际测试中,短期测试时受温度影响,系统PR存在明显的偏差,对评价造成干扰.文章基于IEC 61724-1 2016标准中系统PR修正计算方法,分析、研究了组件温度的计算方式和修正计算方法.通过实例对比、分析、总结给出准确性较高的系统PR温度修正方式,为快速进行系统测量及计算带来便利,并增加系统PR评价可靠性及准确性.分析结果表明:考虑温度、辐照度权重的组件加权平均温度比组件平均温度修正计算系统PR准确性更高;修正到组件年加权平均温度下的系统PR更能准确评价系统运行性能.
Abstract
At this stage,the power generation performance of photovoltaic power plant is usually evaluated by performance ratio(PR).In the field test of short term,the PR of whole photovoltaic system will be affected by the temperature,leading to an obvious deviation of PR,which causes interference for the power generation evaluation of plant.Based on the system PR correction calculation method in IEC 61724-1 2016 standard,this paper analyzes and studies the modules temperature calculation method and temperature correction calculation method.Through the comparative analysis of examples,the system PR temperature correction method with higher accuracy is summarized and given,which brings convenience for the rapid system measurement and calculation,and increases the reliability and accuracy of the system PR evaluation.The analysis results show that the method of weighted average temperature of the module which considers the temperature and irradiation weight is more accurate than the method of module average temperature correction;the system PR can be evaluated much more accurately by the method that is corrected to the annual weighted average temperature of the module.
关键词
光伏电站/系统性能比(PR)/温度修正Key words
photovoltaic power plant/system performance ratio(PR)/temperature correction引用本文复制引用
基金项目
国家重点研发计划(2021YFB1507204)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据