摘要
高质量的光伏功率数据是进行光伏研究的基础,而从光伏电站采集到的数据含有较大比例的异常数据,因此须对光伏功率异常数据进行识别。将不同光照特性的光伏功率数据分别进行建模,对辐照度与功率的概率分布函数进行Copula联合分布函数构建。利用基于经验函数的BFGS参数估计方法对各类Copula函数进行参数估计。参照各Copula函数与经验联合分布函数的欧氏距离与K-S值进行Copula函数选取。结合估计区间最窄原则得出光伏功率条件概率分布90%置信度下的概率功率曲线。根据工程经验以及考虑异常数据时序特性,依照四类异常数据的判别准则,建立异常数据识别模型。利用光伏电站原始数据与人工合成异常数据进行仿真分析,结果表明所提方法能有效、准确地识别出各类异常数据。
High quality of photovoltaic(PV)power data is the basis for conducting PV research,but the data collected from PV power plants contains a large proportion of abnormal data,which need to be identified.The PV power data with different illumination characteristics is modeled separately,and the probability distribution function of irradiance and power is constructed by the Copula joint distribution function.The BFGS parameter estimation method based on empirical function is used to estimate the parameters of various Copula functions.Refer to various Copula functions,Euclidean distance of empirical joint distribution function and K-S values,the Copula function is selected.The probability power curve under 90% confidence of the probability distribution of the PV power condition is obtained by combining the narrowest principle of the estimation interval.According to engineering experience and considering the time series characteristics of abnormal data,an abnormal data recognition model is established based on the criteria of four types of abnormal data.The simulation analysis of raw data and synthetic abnormal data of PV power station shows that the proposed method can identify various types of abnormal data effectively and accurately.
作者
杨茂
黄鑫
YANG Mao;HUANG Xin(Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology,Ministry of Education(Northeast Electric Power University),Jilin 132012,China)
出处
《电力系统自动化》
EI
CSCD
北大核心
2019年第6期64-74,共11页
Automation of Electric Power Systems
基金
国家重点研发计划资助项目(2018YFB0904200)~~
关键词
光伏功率异常数据
光照特征
COPULA函数
区间最窄原则
abnormal data of photovoltaic power
illumination characteristics
Copula function
the narrowest principle of interval
