摘要
针对大规模新能源发电接入后电力系统出现的弃风弃光与灵活性不足问题,提出了考虑弃风弃光手段的灵活性评估方法。首先分析电力系统灵活性需求侧新能源出力的不确定性和负荷预测的误差影响,通过净负荷曲线刻画反映电力系统灵活性需求;考虑了常规火电机组强迫停运的不确定性和机组出力变化的爬坡不确定性,对电力系统灵活性供给侧的常规火电机组开展随机评估;采用基于生产模拟的概率评价方法,在获取电力系统灵活性指标的基础之上,考虑弃风弃光对电力系统灵活性的影响,提出了考虑新能源消纳能力的灵活性评估方法,并通过IEEE RTS-24节点系统和IEEE118节点系统算例验证该评估方法的有效性。
1: Aiming at the problems of wind and photovoltaic power curtailment and the lack of flexibility in the power system after the connection of the large-scale renewable energy power generation, a method of the flexibility evaluation considering the wind and photovoltaic power curtailment is proposed. Firstly, the uncertainty of renewable energy output at the demand side of the power system flexibility and the error influence of load forecasting are analyzed, and the demand for the power system flexibility is reflected by the net load curve;Considering the uncertainty of forced outage of the conventional thermal power units and the climbing uncertainty of unit output changes, then the conventional thermal power units at the supply side of the power system flexibility are randomly evaluated;Using the probability evaluation based on the probabilistic production simulation, and on the basis of obtaining the flexibility index of the power system, the impact of wind and photovoltaic power curtailment on the flexibility of power system is considered, and a new method of the flexibility evaluation taking into account the consumption capacity of renewable energy is finally proposed. The effectiveness of the evaluation method is verified by the examples of the IEEE RTS-24 bus system and the IEEE 118-bus system.
作者
杨策
孙伟卿
韩冬
YANG Ce;SUN Weiqing;HAN Dong(School of Optical-electrical and Computer Engineering,University of Shanghai for Science and Technology,Yangpu District,Shanghai 200093,China;School of Mechanical Engineering,University of Shanghai for Science and Technology,Yangpu District,Shanghai 200093,China)
出处
《电网技术》
EI
CSCD
北大核心
2023年第1期338-346,共9页
Power System Technology
基金
国家自然科学基金项目(51777126)。
关键词
电力系统灵活性
弃风弃光
随机生产模拟
评估指标
power system flexibility
wind and photovoltaic power curtailment
probabilistic production simulation
evaluation index
