Analysis of temperature correction influence on performance ratio of photovoltaic system
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.
photovoltaic power plantsystem performance ratio(PR)temperature correction
国家科技期刊平台
NSTL
万方数据
维普
