多逆变器交流分布式并联系统谐波交互分析方法  

Harmonic Interaction Analysis Method for AC Distributed Parallel System with Multiple Inverters

作　　者：王颖杰[1] 刘涵 张箫 张顺超 WANG Yingjie;LIU Han;ZHANG Xiao;ZHANG Shunchao(School of Electrical Engineering,China University of Mining and Technology,Xuzhou 221000,China)

机构地区：[1]中国矿业大学电气工程学院,江苏省徐州市221000

出　　处：《电力系统自动化》2025年第5期164-175,共12页Automation of Electric Power Systems

基　　金：国家自然科学基金青年基金资助项目(52107218)。

摘　　要：多逆变器并网运行时,逆变器之间、逆变器与电网之间的谐波交互作用会给逆变器自身和电网运行带来很大的负面影响。针对多机系统中交互产生的影响难以识别和评估的问题,文中首先建立了考虑给定电流扰动的单台逆变器电流小信号模型,以此拓展到多逆变器并联系统。同时,提出谐波导纳互交互因子和自交互因子的概念,将系统所受扰动分为互扰和自扰,在此基础上对交互因子的峰值进行分析。然后,基于推导出的峰值准则得到系统发生谐波交互而导致谐波放大的量化条件,并提出谐波交互放大禁区。最后,通过算例分析,探讨了电流控制参数、锁相环参数、逆变器阻尼策略、电网阻抗参数以及逆变器并联台数影响下多逆变器并联系统谐波交互规律,同时验证了所提分析方法的正确性和有效性。When multiple inverters are connected to the power grid,the harmonic interaction among inverters and the harmonic interaction between the inverters and the power grid can significantly impact both the inverters and the overall operation of the power grid.Aiming at the difficulty in identifying and evaluating the effects of interactions in multi-machine systems,this paper first establishes a small-signal current model for a single inverter considering specified current disturbances.The model is extended to the multi-inverter parallel system.Meanwhile,the concepts of the mutual-interaction factor and the self-interaction factor of harmonic admittance are proposed to categorize the system disturbances into mutual disturbances and self-disturbances.On this basis,the peak of the interaction factor is analyzed.Using the derived peak criterion,the quantization conditions for harmonic amplification resulting from the system harmonic interactions are obtained,and an exclusion zone to mitigate harmonic interaction amplification is proposed.Finally,this paper discusses the harmonic interaction rules of the multi-inverter parallel system in the influences of current control parameters,phase-locked loop parameters,inverter damping strategies,power grid impedance parameters,and the number of parallel inverters through case analysis.The correctness and effectiveness of the proposed analytical approach are validated.

关 键 词：并网逆变器 多机系统 谐波交互作用 谐波放大 阻抗分析法 交互因子 峰值准则 稳定禁区 

分 类 号：TM464[电气工程—电器]