电力系统自动化2025，Vol.49Issue(8)：2-11,10.DOI:10.7500/AEPS20240607009
基于有功/无功不平衡激励-内电势幅频响应的设备统一模型
Unified Device Model of Active/Reactive Imbalance Excitation-Internal Electric Potential Amplitude/Frequency Response
摘要
Abstract
The large-scale integration of power electronic devices such as renewable energy power generation and DC transmission,has influenced the dynamic behavior of the power system.The frequent dynamic stability problems of various complex forms pose higher requirements for the analysis of the dynamic process of the system.However,due to the current lack of a unified model of diverse devices that can reflect the system dynamics,it is difficult to analyze the dynamic process of large-scale systems,and the mechanism of dynamic instability still cannot be revealed.Firstly,based on the generalized understanding of the operation principles of the AC power system and the functions of devices,a framework of unified device model based on the first principles of active/reactive power imbalance excitation-internal electric potential amplitude/frequency response is proposed.Then,by analyzing the operation principles of three typical types of devices,namely the synchronous generator,the asynchronous motor,and the grid-connected converter based on the phase-locked loop,the inherent working principles of different devices in forming the internal voltage amplitude/frequency driven by active/reactive power are explained,and the cases of the unified models of these three types of devices are given.Finally,through the simulation of the case system,the essence that the devices adjust the changes of their internal voltage amplitude/frequency based on the active/reactive power imbalance,thereby causing the system dynamics,is elaborated.It illustrates the effectiveness and necessity of the proposed model in understanding the dynamic process of the system.关键词
设备模型/有功/无功功率/内电势幅值/频率/系统动态Key words
device model/active/reactive power/internal electric potential amplitude/frequency/system dynamics引用本文复制引用
何维,袁小明,景浩文,王思成..基于有功/无功不平衡激励-内电势幅频响应的设备统一模型[J].电力系统自动化,2025,49(8):2-11,10.基金项目
国家重点研发计划资助项目(2022YFB2402700) （2022YFB2402700）
国家电网公司科技项目(52272222001J). This work is supported by National Key R&D Program of China(No.2022YFB2402700)and State Grid Corporation of China(No.52272222001J). （52272222001J）
