应用于新能源发电设备阻抗测量的扰动信号类型综述  

Review of Perturbation Signals Applied to Impedance Measurement of Renewable Generator

作　　者：李萌 年珩[1] 胡彬 徐韵扬 廖玉茗 杨军[1] 刘一鸣 LI Meng;NIAN Heng;HU Bin;XU Yunyang;LIAO Yuming;YANG Jun;LIU Yiming(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,Zhejiang Province,China)

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027

出　　处：《中国电机工程学报》2022年第17期6296-6315,共20页Proceedings of the CSEE

摘　　要：随着新能源发电设备广泛接入电网,新能源发电设备并网运行时有小信号失稳风险,这一稳定性问题得到广泛关注。阻抗法是一种有效的稳定性分析方法,而获得准确的新能源发电设备阻抗特性是进行阻抗稳定性分析的关键。阻抗测量作为一种通过注入小信号扰动来获取阻抗特性的方法,已成为新能源发电设备并网稳定性研究领域的热点。在阻抗测量中,需要注入扰动信号来激励系统产生响应,并根据响应计算阻抗。为了满足阻抗测量的准确性与快速性的要求,目前已有多种扰动信号类型被提出。文中列举目前得到广泛研究的扰动信号类型,分别从测量精度与测量效率2个方面探讨其应用特性。进而比较各种扰动信号类型在交直流应用场景下的适用性,并给出不同应用场景下扰动信号类型的选取方式。With the wide access of renewable generator to power grid, the stability of renewable generator equipment access to power grid has been widely concerned with the risk of small-signal instability issue. Impedance method is effective for stability analysis, and obtaining accurate impedance characteristics of renewable generator is the key to impedance stability analysis. As a method to obtain impedance characteristics by injecting small signal perturbation,impedance measurement has become a hot topic in the field of grid-connected stability of renewable generator. In impedance measurement, it is necessary to inject perturbation signal to excite the system to respond, and calculate the impedance according to the response. In order to meet the accuracy requirement and rapidity of impedance measurement, a variety of perturbation signal types were proposed. This paper listed the types of perturbation signals which were widely studied,and discussed their application characteristics from two aspects of measurement accuracy and efficiency. Then, the applicability of various perturbation signals in various application scenarios was compared, and the selection methods of perturbation signal types in different application scenarios were given.

关 键 词：新能源发电设备 阻抗建模 阻抗测量 有源扰动注入 小信号扰动 

分 类 号：TM712[电气工程—电力系统及自动化]