• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

电力建设 ›› 2018, Vol. 39 ›› Issue (10): 63-70.doi: 10.3969/j.issn.1000-7229.2018.10.008

• 新能源发电 • 上一篇    下一篇

基于新型场景划分与考虑时序相关性的光伏出力时间序列模拟方法

江雪辰1,朱俊澎1,袁越1,王跃峰2,黄阮明3   

  1. 1.河海大学能源与电气学院,南京市 211100;2.中国电力科学研究院有限公司,北京市 100192;3.国网上海市电力公司,上海市 200120
  • 出版日期:2018-10-01
  • 作者简介:江雪辰(1994),女,硕士研究生,主要研究方向为含可再生能源的电力系统分析; 朱俊澎(1990),男,博士,讲师,主要研究方向为主动配电网运行与优化; 袁越(1966),男,博士,教授,博士生导师,主要研究方向为电力系统运行与分析、可再生能源发电系统等; 王跃峰(1981),男,高级工程师,主要研究方向为电力系统运行与分析; 黄阮明(1980),男,高级工程师,主要研究方向为电网规划与新能源发电并网技术。
  • 基金资助:
    国家自然科学基金项目(51477041);国家电网公司科技项目(考虑季节性和随机性影响的大规模清洁能源年月计划优化方法研究与应用)

Simulation Method Based on Improved Scenario Division Considering Temporal Correlation for PV Output Time Series

JIANG Xuechen1,ZHU Junpeng1,YUAN Yue1,WANG Yuefeng2,HUANG Ruanming3   

  1. 1.College of Energy and Electrical Engineering, Hohai University, Nanjing 211100, China;2.China Electric Power Research Institute, Beijing 100192, China;3.State Grid Shanghai Municipal Electric Power Company, Shanghai 200120, China
  • Online:2018-10-01
  • Supported by:
    This work is supported by National Natural Science Foundation of China (51477041) and State Grid Corporation of China Research Program.

摘要: 针对现有光伏出力的马尔科夫链模型在原始数据分段和随机抽样方面的不足,文章提出一种基于新型场景划分与考虑时序相关性的光伏出力时间序列模拟方法。首先引入Davies-Bouldin有效性指标优化模糊C均值聚类(fuzzy C-mean clustering,FCM)法,进行场景划分,形成数据特征更清晰的原始光伏出力序列集合。然后建立不同场景的光伏出力状态转移矩阵,通过马尔科夫链蒙特卡洛法生成光伏出力时间序列,在此过程中,利用Copula理论进行条件概率抽样生成下一时刻光伏出力状态值,以降低传统蒙特卡洛抽样的随机性。实际算例表明,文章所提方法生成的光伏出力时间序列不仅在数据的概率统计特性方面比现有的模型结果更精确,而且更好地保留了原始序列的自相关性。

关键词: 光伏出力时间序列, 马尔科夫链蒙特卡洛, 场景划分, 时序相关性, Copula函数

Abstract: Focusing on the defect of raw data segmentation and random sampling for the existing Markov chains model of PV output, a simulation method of PV output time series which is based on a new type of scenario division and considering temporal correlation is proposed. Firstly, the DBI clustering effectiveness index is introduced to optimize fuzzy C-mean clustering method, and the scenes are divided into different situations and the data sets of historical PV output series with more obvious data characteristics are established. Then, a number of state transition matrixes in different scenes are generated and PV output series are simulated through Markov chains Monte Carlo method. During this process, the state-value for the next moment can be got using the Copula theory to conduct the conditional probability sampling, so as to reduce the randomness of the traditional Monte Carlo sampling. According to actual case calculation, in the new method in this article, the PV output series are not only more accurate than the existing model in probabilistic statistical features of the data, but also preserve better autocorrelation of the original sequence.

Key words: PV output time series, Markov chains Monte Carlo method, scenario division, temporal correlation, Copula method

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