摘要
交直流混合配电系统作为未来配电系统的重要形式,其稳定运行受交直流间系统动态交互作用限制,该文研究了交直流两侧配电网中电力电子设备交互作用对配电系统稳定性的影响。通过构建含光伏并网的交直流混合配电系统模型,研究交直流侧光伏并网系统导致的交互作用及其对系统稳定性的影响。首先,建立了含交直流光伏并网的交直流混合系统小信号模型。然后,分析了交直流侧光伏动态交互作用产生的机理,并在考虑功率不同流向的情况下,通过研究系统不同参数下互影响分量幅频特性和系统主导模态变化轨迹,研究了交互作用对系统稳定性的影响规律。研究结果表明,交直流侧交互作用的传递受互联变换器控制等参数的影响,且功率流向改变影响其传递特性。最后,通过仿真分析验证了分析结果的正确性。
The AC/DC hybrid power distribution system is an important form of future power distribution systems.The dynamic interaction between the AC and DC systems restricts its stable operation.This paper examines the impact of power electronic device interactions on the stability of AC and DC power distribution systems.By constructing a model of the AC/DC hybrid power distribution system with photovoltaic grid connection,the interactions between the photovoltaic grid connection on the AC and DC sides and their influence on system stability are analyzed.Firstly,a small-signal model of the AC/DC hybrid system with AC and DC photovoltaic grid connection was established.Then,the mechanism of the dynamic interaction between the AC and DC sides of the photovoltaic grid connection was qualitatively analyzed.Considering the different power flow directions,the amplitude-frequency characteristics of the mutual influence components and the trajectory of the dominant mode change in the system under different system parameters were studied to analyze the interaction's influence on system stability.The results show that the transmission of the interaction between the AC and DC sides is affected by parameters such as the control of the interconnection converter,and that changes in power flow direction alter its transmission characteristics.Finally,the correctness of the analysis results was verified through simulation analysis.
作者
葛津铭
董育玮
张明泽
王振浩
王朝斌
尹瑜
王尉
翟俊龙
GE Jinming;DONG Yuwei;ZHANG Mingze;WANG Zhenhao;WANG Chaobin;YIN Yu;WANG Wei;ZHAI Junlong(Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology(Northeast Electric Power University),Ministry of Education,Jilin 132012,Jilin Province,China;State Grid Changchun Power Supply Company,Changchun 130021,Jilin Province,China)
出处
《电网技术》
北大核心
2026年第3期1234-1244,I0106-I0109,共15页
Power System Technology
基金
吉林省自然科学基金项目(YDZJ202401582ZYTS)。
关键词
交直流混合配电系统
振荡
小信号稳定性
交互作用
光伏
AC/DC hybrid power distribution system
oscillation
small-signal stability
interaction
photovoltaic
