基于统一控制结构的新能源同步机控制与稳定性分析  

Control and Stability Analysis of Motor-generator Pair Based on the Unified Control Framework

作　　者：李晨阳 黄永章 王岳 王哲凡 赵海森 LI Chenyang;HUANG Yongzhang;WANG Yue;WANG Zhefan;ZHAO Haisen(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(North China Electric Power University),Beijing 102206,China;NCEPU(Yantai)Power Semiconductor Technology Research Institute Co.,Ltd.,Yantai 264000,China)

机构地区：[1]新能源电力系统全国重点实验室(华北电力大学),北京102206 [2]华电(烟台)功率半导体技术研究院有限公司,山东烟台264000

出　　处：《华北电力大学学报(自然科学版)》2025年第2期65-79,90,共16页Journal of North China Electric Power University:Natural Science Edition

基　　金：国家自然科学基金资助项目(52177041);新能源电力系统国家重点实验室自主研究课题(LAPS202202).

摘　　要：为全面提升高比例新能源电网的运行稳定性,提出了具有真实同步机接口的基于串联同步机结构的新能源同步机(motor generator pair,MGP)并网技术。为实现多场景下新能源采用MGP并网的稳定运行,需要全面研究其运行控制技术,然而目前尚未对不同控制间的联系及其对MGP运行特性的影响进行系统研究。为此,首先本文建立了MGP通用的稳定分析模型并研究了三种基础的控制方法及其实验结果,比较了频率控制和矢量控制的差异性。其次,基于对MGP系统物理特性的理解,分析了其具备构网能力的基础。然后,根据控制环结构和功能对不同控制进行分类并建立了MGP的统一控制结构,揭示了控制环间的联系及其与机组外特性间的耦合关系。最后,基于统一控制结构研究了控制稳定性和协调控制策略:1)建立了MGP采用上述三种控制的状态空间模型,得到了控制参数的稳定范围;2)基于两种矢量控制系统的状态空间模型,揭示了转子角和锁相环动态对系统稳定性的影响;3)提出了独立型微电网中光伏和储能联合接入MGP的协调控制策略,并通过电磁暂态仿真验证了策略的有效性。In order to comprehensively improve the stability of the future power grids with high penetration of renewable energy resources(RES),we propose the motor-generator pair(MGP)system based on a series synchronous machine structure with a real synchronous machine interface.To realize the stable operation of RES via the MGP system in various scenarios,it is necessary to investigate its control methods.However,no systematic research has been conducted on the interrelationships between different controls and their impact on characteristics of the system.To this end,firstly,we establish the general stability analysis model for MGP,investigate three basic control methods and the experimental results,and compare the differences between frequency and vector control.Secondly,based on the understanding of the physical characteristics of the MGP system,we analyze the basis of MGP with grid forming.Thirdly,we classify the various controls according to their functions and establish a unified control framework for MGP,revealing the relationship between control loops and external characteristics of the system.Finally,we investigate the small-signal dynamics and coordinated control strategy based on the unified control framework.(1)We establish the state-space models of MGP using the above three kinds of control,and derive the stable range of control parameters.(2)We reveal the influence of rotor angle and phase-locked loop dynamic on system stability based on the state-space models of the two systems with vector control.(3)We propose a coordinated control strategy for photovoltaics and energy storage integrated into MGP in a stand-alone microgrid,and demonstrate its effectiveness with the electromagnetic transient simulation.

关 键 词：高比例新能源 电网稳定性 新能源同步机 构网型 统一控制结构 

分 类 号：TM341[电气工程—电机]