多光储虚拟同步发电机接入多机电力系统的动态交互作用机理分析  

Dynamic Interaction Mechanism Analysis of Multi-machine Power System Integrated with Multiple Photovoltaic-battery Virtual Synchronous Generators

作　　者：黄世楼 王彤[1] 金铭鑫 焦典 HUANG Shilou;WANG Tong;JIN Mingxin;JIAO Dian(State Key Laboratory of Alternate Electric Power Systems with New Energy Resources,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206

出　　处：《高电压技术》2022年第9期3710-3722,共13页High Voltage Engineering

基　　金：新能源电力系统国家重点实验室(LAPS20021);中央高校基本科研业务费专项资金(2021MS006)。

摘　　要：随着新能源友好并网技术和储能技术的大力发展,光储虚拟同步发电机将具有广阔的发展前景。然而,多光储虚拟同步发电机与多机电力系统间动态交互作用机理尚未明确,可能引起的振荡问题将给电网稳定运行带来较大风险。首先建立多光储虚拟同步发电机子系统和多机电力系统子系统的状态空间模型及其传递函数模型。然后,建立两个子系统间动态交互作用模型,推导多光储虚拟同步发电机向多机电力系统提供的阻尼转矩,分析其动态交互作用的路径和机理。最后,以多光储虚拟同步发电机接入4机2区系统和10机39节点系统为算例,详细分析光储系统采用虚拟同步控制前后和虚拟同步控制参数对动态交互作用的影响规律,结合系统特征值分析和时域仿真验证分析结论的正确性。With the development of new energy friendly grid-connected technology and energy storage technology, photovoltaic-battery virtual synchronous generator(PV-battery VSG) will have broad development prospects. However, the dynamic interaction mechanism between multiple PV-battery VSGs and multi-machine power system is not clear, and the possible oscillation problem will bring great risk to the stable operation of grid. Firstly, the state-space models of multiple PV-battery VSGs subsystem and multi-machine power system subsystem are established, and the transfer functions are derived. Then, the dynamic interaction model between two subsystems is established, and the damping torque provided by multiple PV-battery VSGs to multi-machine power system is derived to analyze the path and mechanism of dynamic interaction. Finally, based on the examples of multiple PV-battery VSGs connected to 4-machine 2-area system and 10-machine 39-bus system, the influences of virtual synchronous control and the control parameters on dynamic interaction are analyzed in detail, and the correctness of proposed conclusion is verified by system eigenvalue analysis and time domain simulation.

关 键 词：多光储虚拟同步发电机 动态交互作用 多机电力系统 机理分析 交互路径 传递函数 

分 类 号：TM341[电气工程—电机] TM73