基于多智能体一致性的VSG并联系统功率交互振荡抑制策略  

The Power Interactive Oscillation Suppression Strategy for VSG Parallel Systems Based on Multi-Agent Consensus

作　　者：李志军 邱春阳 刘士杰 LI Zhijun;QIU Chunyang;LIU Shijie(School of Electrical Engineering,Hebei University of Technology,Tianjin 300130,China)

机构地区：[1]河北工业大学电气工程学院,天津300130

出　　处：《电网与清洁能源》2025年第1期17-25,共9页Power System and Clean Energy

基　　金：河北省重点研发计划资助项目(20312102D)。

摘　　要：虚拟同步发电机(virtual synchronous generator,VSG)在多机并列运行时,由于客观条件的限制,各VSG的内部参数和外部条件很难协调一致,在负荷变化后会在并列运行的VSG间产生功率的交互振荡,严重时甚至造成系统失稳。针对此问题,该文提出了一种基于多智能体一致性算法的惯量自适应控制策略。通过建立VSG并联系统的等效电路模型,用小信号分析的方法推导其传递函数并分析了产生功率交互振荡的原因。在此基础上,利用多智能体一致性算法,获取相邻VSG间的输出角频率差值;基于交互振荡过程中各VSG的惯量调节规律,利用VSG间的角频率差值和自身频率变化率,设计并构造了并列运行VSG的惯量调整项,使并列运行的VSG在负荷扰动后的频率响应快速趋于一致,有效抑制了VSG间功率的交互振荡,提升了并列运行VSG的稳定性;通过搭建仿真模型验证了所提控制策略的有效性和优越性。When the virtual synchronous generator(VSG)is running in parallel with multiple machines,due to the limitations of objective conditions,the internal parameters and external conditions of each VSG are difficult to coordinate,and the interactive oscillation of power will be generated between VSGs running in parallel after load changes,which may even cause system instability in severe cases.To solve this problem,an inertial adaptive control strategy based on multi-agent consistency algorithm is proposed in this paper.By establishing the equivalent circuit model of the VSG parallel system,the transfer function of the VSG parallel system is deduced by the small signal analysis method,and the cause of power interaction oscillation is analyzed.On this basis,the multi-agent consistency algorithm is used to obtain the output frequency difference between adjacent VSGs.Furthermore,based on the inertia regulation law of each VSG in the process of interactive oscillation,the frequency difference between VSG and their own frequency change rate are used to design and construct the inertia adjustment term of VSGs running in parallel,so that the frequency response of VSG running in parallel after load disturbance tends to be consistent quickly,effectively suppressing the interactive power oscillation between VSGs.And improving stability of VSGs in parallel.Finally,the effectiveness and superiority of the proposed control strategy are verified by building a simulation model.

关 键 词：虚拟同步发电机 并列运行 功率振荡 一致性算法 

分 类 号：TM464[电气工程—电器]