计及动态负荷特性的多馈入直流系统暂态电压强度分析方法  

Transient Voltage Strength Analysis Method for Multi-infeed DC System Considering Dynamic Load Characteristics

作　　者：董怡滟 黄莹[1] 王国腾 徐政[1] 周月宾 陈煜坤 DONG Yiyan;HUANG Ying;WANG Guoteng;XU Zheng;ZHOU Yuebin;CHEN Yukun(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China;State Key Laboratory of HVDC(Electric Power Research Institute,China Southern Power Grid),Guangzhou 510663,China)

机构地区：[1]浙江大学电气工程学院,杭州310027 [2]直流输电技术全国重点实验室(南方电网科学研究院有限责任公司),广州510663

出　　处：《电力系统及其自动化学报》2025年第1期1-9,共9页Proceedings of the CSU-EPSA

基　　金：直流输电技术全国重点实验室开放基金资助项目(SKLHVDC-2023-KF-07)。

摘　　要：针对由于动态负荷和非同步机电源的暂态复杂特性导致系统暂态电压强度分析困难的问题,提出一种计及动态负荷特性的多馈入直流系统暂态电压强度分析方法。首先,根据电压刚度概念,给出暂态电压刚度的定义;然后,为描述感应电动机、新能源机组及直流等动态元件对系统暂态电压的影响,提取暂态关键时间断面,将复杂的暂态分析转换为关键时间断面的代数求解模型,从而提出暂态电压强度分析方法。最后,以华东电网为例验证所提的暂态电压强度分析方法的有效性,结果表明该方法能够对定量评估多馈入系统的电压支撑强度具有一定的指导意义。Aimed at the difficulty in transient voltage strength analysis due to the complex transient characteristics of dy-namic load and non-synchronous-machine sources,a transient voltage strength analysis method for a multi-infeed DC system considering the dynamic load characteristics is proposed in this paper.First,the definition of transient voltage stiffness is given by drawing on the concept of voltage stiffness.Then,to describe the effects of dynamic components in-cluding induction motors,renewable energy units and DCs on the system transient voltage,the transient key time sec-tions are extracted,and the complex transient analysis is converted into an algebraic solution model of key time sec-tions,so as to formulate the transient voltage strength analysis method.Finally,the effectiveness of the proposed meth-od is verified by a case study of East China Power Grid,and simulation results show that this method is of certain guid-ing significance in quantitatively evaluating the voltage support strength of multi-infeed DC systems.

关 键 词：多直流馈入系统 暂态电压强度 动态负荷 时间断面 新型电力系统 

分 类 号：TM712[电气工程—电力系统及自动化]