高比例可再生能源并网的电力系统灵活性评价与平衡机理

发布时间：2018-05-15 07:33

本文选题：高比例可再生能源电力 + 灵活性　；参考：《中国电机工程学报》2017年01期

【摘要】：高比例可再生能源并网的电力系统中,波动电源和负荷不确定性双重叠加,采用增加备用应对不确定性的模式在技术和经济上均难以为继,亟待建立一种新的灵活性平衡机制。该文首先给出了电力系统灵活性的概念及其特征,提出了多时间尺度灵活性供给需求平衡的通用数学方法和灵活性度量指标;建立灵活性裕度的概率模型,阐明曲线平移类、曲线整形类和综合类等3种类型灵活性增加途径;最后,通过我国北方某大型风电基地实际数据,以调峰灵活性为例,对该文提出的平衡机理和指标体系进行了验证和测算。算例表明灵活性指标能够与系统负荷损失风险、新能源限电建立线性关联,依据灵活性平衡机理可实现源网荷储复杂场景下的综合灵活性优化。
[Abstract]:In the grid-connected power system with high proportion of renewable energy, the uncertainty of fluctuating power supply and load is superimposed, and it is difficult to continue technically and economically by using the mode of increasing the uncertainty of standby response. It is urgent to establish a new flexible balancing mechanism. In this paper, the concept and characteristics of flexibility in power system are given, and a general mathematical method of supply and demand balance of flexibility in multi-time scale and a measure index of flexibility are proposed, and the probability model of flexibility margin is established. Finally, through the actual data of a large wind power base in the north of China, the flexibility of peak-shaving is taken as an example. The equilibrium mechanism and index system proposed in this paper are verified and measured. An example shows that the flexibility index can be linearly correlated with the risk of system load loss, and the power limit of new energy can be linearly correlated. According to the flexibility balance mechanism, the comprehensive flexibility optimization can be realized under the complex scenario of source network load and storage.
【作者单位】：电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系);
【基金】：国家重点研发计划支持项目(2016YFB0900101) 国家自然科学基金项目(51677099) 国家电网公司科技项目(XTB17201500037)~~
【分类号】：TM614;TM73

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