基于运行韧性评价的配电网电压暂降治理评估  

Evaluation of Voltage Sag Management in Distribution Network Based on Operation Resilience Assessment

作　　者：徐悦 李博[1] 孙建军[1] 丁凯 李伟 XU Yue;LI Bo;SUN Jianjun;DING Kai;LI Wei(School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China;Electric Power Research Institute of State Grid Hubei Electric Power Co.,Ltd.,Wuhan 430077,China)

机构地区：[1]武汉大学电气与自动化学院,湖北省武汉市430072 [2]国网湖北省电力有限公司电力科学研究院,湖北省武汉市430077

出　　处：《电力系统自动化》2021年第5期104-110,共7页Automation of Electric Power Systems

基　　金：国家自然科学基金重点项目(51637007);国家电网公司科技项目(现代工业园区电压暂降影响因素评估及防治关键技术研究,52153218000B)。

摘　　要：随着中国生产制造水平的提升,配电网中敏感负荷日趋增加,电压暂降及短时中断造成的经济损失日趋严重,而当前的可靠性及韧性的评价方法无法评价短时间尺度下配电网持续供电的能力,也难以反映电压暂降的影响程度,因而无法提供量化指标为电压暂降治理作规划参考。文中在挖掘电网以往评估方法内涵的基础上,针对含敏感负荷的配电网,考虑网架结构、负荷水平、治理措施经济性等因素,提出了运行韧性评估方法与评估流程,定义了配电网运行韧性指标,可为电压暂降治理方案评价提供量化参考。通过具体算例分析对比了不同网架结构、不同治理手段下含敏感负荷配电网的可靠性指标与运行韧性指标,结果表明运行韧性指标能够更明显和有效地反映电压暂降治理的技术经济性。With the rising manufacturing level in China,the ratio of sensitive load in the distribution network keeps increasing,and massive economic loss caused by voltage sag and short-term interruption has become increasingly serious.However,current assessment methods of reliability and resilience are insufficient to evaluate the continuous power supply capacity of the distribution network in the short-term scale.It is difficult to reflect the impact level of voltage sags,which cannot put forward the quantitative indicators as planning reference for voltage sag management.In this paper,on the basis of mining the connotation of the previous assessment methods for the power grid,aiming at the distribution networks with sensitive loads,an assessment method and workflow of operation resilience are presented considering the factors such as grid structure,load level,economy of control measures.Furthermore,the indicators of operation resilience for the distribution network are defined,which can provide the quantitative reference to the assessment of voltage sag management.After performing assessment through specific examples,the indicators of reliability and operation resilience with different power grid structures,and management measures are analyzed and compared in the distribution network with sensitive loads.The result shows that the indicators of operation resilience can evidently and effectively reflect the technical economy of voltage sag management.

关 键 词：配电网 敏感负荷 电压暂降 运行韧性 

分 类 号：TM714.2[电气工程—电力系统及自动化]