三相交流系统动力学及VSC接入问题研究  

Dynamics of Three Phase AC System and VSC Access Problem Research

作　　者：纪锋 高路 林畅 JI Feng;GAO Lu;LIN Chang(State Key Laboratory of Advanced Transmission Technology(Global Energy Interconnection Research Institute Ltd.),Changping District,Beijing 102200,China)

机构地区：[1]先进输电技术国家重点实验室(全球能源互联网研究院有限公司),北京市昌平区102200

出　　处：《中国电机工程学报》2022年第6期2286-2297,共12页Proceedings of the CSEE

基　　金：国家重点研发计划项目(2020YFB1506603)。

摘　　要：该文在经典力学的理论框架下,完成三相交流电力系统的动力学建模。使用克拉克(Clark)变换将三相节点的电压和磁链变换到复数域,选择节点的电压和磁链分别作为动力学系统的速度和位置,得到系统的拉格朗日函数,进而使用变分原理获得静止坐标系下的系统动力学方程。推导同步旋转坐标系中的系统微分方程,并对瞬时无功的物理意义做出解释。该文是对交流电力系统力学化的一次有益尝试。在实际应用方面,基于动力学的观点,对VSC接入弱交流电网的稳定控制问题,提出一种有效的解决方案。This paper derived the dynamics model of three-phase AC power system under the theoretical framework of classical mechanics.The three phase nodal voltage and flux were transformed into the complex domain by Clark transform.By selecting the nodal voltage and nodal flux as the speed and position of the dynamics system respectively,the Lagrangian function of the system was obtained.And then the dynamics model in the static coordinate system was derived by using the variational principle.The dynamics equation of the system in synchronous rotating coordinate system was further derived in this paper.The physical meaning of instantaneous reactive power was explained.This paper was a beneficial attempt to the mechanization of AC power system.In the end,this paper proposed an effective solution to the stability control problem of VSC connected to weak AC power grid.

关 键 词：三相交流电力系统 电压源型变流器 经典力学 拉格朗日函数 静止坐标系 同步旋转坐标系 阻抗 

分 类 号：TM46[电气工程—电器]