基于一致性算法的多虚拟同步机功率振荡协调抑制  

Coordinated Power Oscillation Suppression of Multi-VSGBased on Consensus Algorithm

作　　者：林继灿 刘沈全 王钢[1] 黄敏[1] LIN Jican;LIU Shenquan;WANG Gang;HUANG Min(School of Electric Power Engineering,South China University of Technology,Guangzhou 510640,Guangdong Province,China)

机构地区：[1]华南理工大学电力学院,广东省广州市510640

出　　处：《电网技术》2023年第11期4668-4678,共11页Power System Technology

摘　　要：虚拟同步机控制(virtual synchronous generator,VSG)在模拟同步发电机特性以提供惯量支撑的同时,不可避免地引入了有功功率振荡的问题,特别在多个VSG交互的情形下,VSG之间较低的互阻尼加剧了振荡的波动性,这些振荡将损害系统的稳定运行和可再生能源的有效调节。目前,在采用分布式通信架构抑制多VSG并联有功振荡的方法中,未考虑有功合理出力以及非理想通信条件下算法收敛等问题。因此,为抑制系统功率振荡,提高系统之间的互阻尼,首先分析了VSG系统并联交互振荡的原理,同时利用功角构造性能评价函数,推导出一种增加互阻尼的一致性算法,使得扰动下系统内VSG的频率快速收敛达到一致。其次通过构造李雅普诺夫能量函数的方法证明了所提方法的稳定性,在此基础上,利用频域的Nyquist曲线分析互阻尼参数对系统稳定性的影响。最后,通过电磁暂态仿真证明了互阻尼的一致性算法能有效抑制并联VSG系统的功率振荡,同时在非理想通信环境下也能保证算法的有效性。While simulating thecharacteristicsof synchronous generators to provide the inertia support,the virtual synchronous generator(VSG)inevitably leads to the problem of active power oscillation.Especially in the case of multi-VSG interacting,the low mutual damping between VSGs intensifies the oscillation volatility,which may damage the stable operation of the system and the effective regulation of the renewable energy.Currently,in the methods of using the distributed communication architectures to suppress the multi-VSG active power oscillation,the optimization of active power output and the algorithm convergence under the non-ideal communication conditions are often neglected.Hence,to suppress the power oscillations of the system and improve the mutual damping,firstly,the principle of parallel and interactive oscillation of the VSG system is analyzed.Simultaneously,theperformanceevaluationfunction constructed by using the power angle is applied to derive the consensus algorithm for increasing the mutual damping so that the frequency of VSG in the system under disturbance may converge more quickly and achieve consensus.Secondly,the stability of the system is proved by constructing the Lyapunov energy function.On this basis,the influence of mutual damping parameters on the stability of the system is analyzed by using the Nyquist curve in the frequency domain.Finally,the electromagnetic transient simulation proves that the mutual damping consistency algorithm is able to effectively suppress the power oscillation of the parallel VSG system,and also ensure the effectiveness of the algorithm in the non-ideal communication environment.

关 键 词：虚拟同步机 功率振荡 互阻尼 一致性算法 李雅普诺夫能量函数 

分 类 号：TM721[电气工程—电力系统及自动化]