高比例电力电子电力系统强度的定义、分类及分析方法  

Definition,Classification,and Analysis Method of the Strength of Power System Integrated With High Penetration of Power Electronics

作　　者：孙华东 赵兵 徐式蕴 于琳 王宝财 李文锋 郑超 SUN Huadong;ZHAO Bing;XU Shiyun;YU Lin;WANG Baocai;LI Wenfeng;ZHEN Chao(National Key Laboratory of Power Grid Safety(China Electric Power Research Institute),Haidian District,Beijing 100192,)

机构地区：[1]电网安全全国重点实验室(中国电力科学研究院有限公司),北京市海淀区100192

出　　处：《中国电机工程学报》2024年第18期7039-7048,I0001,共11页PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING

基　　金：国家电网有限公司科技项目(5100-202355385A-2-3-XG)。

摘　　要：传统系统强度反映了以同步机为主导的交流系统对所接入设备的支撑能力。随着我国电力系统源-网-荷-储各层级中电力电子设备的大规模接入,已逐渐形成高比例电力电子电力系统基本格局。电力电子设备的弱支撑性、低抗扰性导致高比例电力电子电力系统强度发生重大变化,近年来受到国内外广泛关注。为此,该文论述了高比例电力电子电力系统强度的定义,针对频率和电压两种安全稳定形态,根据动态过程响应特征提出支撑强度和调节强度的分类方法,建立系统强度基础体系框架。在支撑强度方面,将广义惯量及惯量冲击比作为频率支撑强度指标,将短路比及阻抗比作为电压支撑强度指标;在调节强度方面,分别建立评估频率/电压波动的灵敏度指标。最后,提出提升系统强度的若干关键技术。研究成果将为保障高比例电力电子电力系统安全稳定高效运行,实现“双碳”目标提供有力支撑。System strength reflects the support capability of AC systems for connected devices.With the increasing of power electronics,a shift towards high-penetration power electronics systems has emerged,altering the traits of power systems dominated by synchronous machines.However,the weak support,low disturbance resistance and high flexibility of power electronics have gradually changed the system strength.Accordingly,this paper proposes the definition of strength of power system integrated with high penetration of power electronics.It proposes a classification method for supporting strength and regulating strength based on the dynamic response characteristics for frequency and voltage stability modes,establishing a fundamental system strength framework.For supporting strength,the generalized inertia and inertia disturbance ratio serves as the index,while the short-circuit ratio and impedance ratio serve as the voltage supporting strength indexes.For regulating strength,sensitivity indicators for frequency/voltage fluctuations are established separately.Finally,several key technologies for enhancing system strength are introduced.These findings will provide support for ensuring the safe,stable,and efficient operation of power systems and achieving the“dual carbon”goal.

关 键 词：系统强度 频率强度 电压强度 支撑强度 调节强度 

分 类 号：TM73[电气工程—电力系统及自动化]