摘要
为提高光伏电站接入系统能力,采用光储联合运行方式,研究加入储能前后光伏电站发电特性变化。为评估光储系统接入对电网可靠性的贡献,提出一种可靠性置信区间计算方法。首先对青海省格尔木某光伏电站历史数据做模糊C均值聚类,将其分为晴天、少云、多云、阴雨4种天气类型,利用四分位法对历史数据做统计分析,排除异常值。在此基础上提出一种光储系统功率带提取方法,搭建IEEE-RTS79可靠性测试系统,利用序贯蒙特卡罗法计算光储发电系统功率带对应的可靠性指标,从而得到含储能光伏电站可靠性置信区间。该可靠性区间计算结果为评价光储系统接入电网的可靠性贡献提供理论依据,对发电调度具有一定指导意义。
In order to improve the capacity of photovoltaic station access the power generation system,a combined operation mode integrated with photovoltaic( PV) system and energy storage system( ESS) is established to study the characteristics of photovoltaic power station before and after adding energy storage system. A reliability confidence interval calculation method is proposed in order to evaluate the contribution to the reliability of power grid which has PV and ESS. Firstly,Fuzzy-C-Means clustering is done to the historical data of a photovoltaic power station in Golmud,Qinghai province,dividing the historical data into four kinds of weather types,sunny,cloudy,partly cloudy, rainy. Analyzing the historical data and eliminating the outliers by using the Quartile Method. On this basis,an extraction method of power band for PV and ESS generation system is proposed in this paper. Building the IEEE-RTS79 reliability test system and using sequential Monte Carlo method to calculate the reliability index of the power band of PV and ESS generation system, resulting in containing the reliability confidence interval of this system. The results of the reliability interval calculation provides a theoretical basis for evaluating the reliability of the PV and ESS generation system access to the power grid,and it has great guiding significance for the power generation scheduling.
出处
《电工技术学报》
EI
CSCD
北大核心
2017年第15期136-144,共9页
Transactions of China Electrotechnical Society
基金
国家自然科学基金项目(51677067)
中央高校基本科研业务费专项资金项目(2015MS32)
北京市自然科学基金项目(4132061)
国家电网公司项目(DG71-15-039)资助
关键词
光伏
储能
四分位法
功率带
可靠性
置信区间
Photovoltaic
energy storage
quartile method
power band
reliability
confidence interval
