摘要
由于风电出力具有明显的不确定性,依靠现有的风电特性指标,无法确定风电出力曲线的基本形状,一定程度上限制了风电特性指标在电网运行中的实际应用。引入了指标体系的时段属性概念,提出面向系统运行的风电出力特性指标体系。其中,指标"全日平均出力"表征了全天风电出力水平,指标"峰谷时段风电出力中位数差"表征了风电出力对系统调节能力的影响。指标"峰时段风电最小出力"表征了峰荷时段风电对电网运行的最小支撑,指标"谷时段风电最大出力"表征了谷荷时段风电对电网运行的最大挑战。以某地区5个风电场为例,计算了所提评价体系的各类指标,对历史风电出力曲线进行分类并形成多条典型风电出力曲线。计算结果说明了所提指标体系计算方便,物理意义直观,有助于开展系统运行的实际工作和相关研究。
Due to the obvious uncertainty of wind power, the exact information about the shape of wind power output curve couldn＇t be gotten, if relying on the current wind power evaluation indexes. This drawback limits, to some extent, the sufficient application of wind power evaluation indexes in prac- tical power grid operation. This paper introduces the concept of time dependence and proposes an evaluation index system for wind power output, which could be useful for the integration of wind power. The index ＂averaged wind power output per day＂ is used to describe the level of wind power output. The index ＂distinction of wind power median output between peak and valley load period＂ is applied to quantitatively analyze the impact of wind power output on peaking service. The index ＂minimum wind power output in peak load period＂ is related to the minimum support for power system operation. The index ＂maximum wind power output in valley load period＂ is related to the maximum challenge to power system operation. Based on calculation of typical indexes for five different wind farms, the paper explains the calculated index and application in the curve classification. The results show that the proposed index has intuitive physical meaning, and helps to carry out practical work and related research in power system operation.
出处
《电网与清洁能源》
北大核心
2016年第2期42-51,57,共11页
Power System and Clean Energy
基金
国家自然科学基金项目(51277141)
国家高技术研究发展计划(863计划)项目(2011AA05A103)~~
关键词
风电
指标体系
峰谷时段
曲线分类
wind power
index system
peak-valley timeperiod
curve classification
