惯量阻尼自适应虚拟直流发电机控制策略  

Control strategy of inertia damping adaptive virtual DC generator

作　　者：王正男 张新慧[1] 彭克[1] 高震 程梦竹 WANG Zhengnan;ZHANG Xinhui;PENG Ke;GAO Zhen;CHENG Mengzhu(School of Electrical and Electronic Engineering,Shandong University of Technology,Zibo 255000,Shandong,China)

机构地区：[1]山东理工大学电气与电子工程学院,山东淄博255000

出　　处：《电测与仪表》2024年第1期189-194,共6页Electrical Measurement & Instrumentation

基　　金：国家重点研发计划项目(2016YFB0900600);国家自然科学基金资助项目(51807112)。

摘　　要：直流微网无需考虑频率、相位等因素,拓扑结构简单且易于控制,但基于大量电力电子变换器接口的直流微网惯性较低,严重时会影响微网的安全稳定运行。针对此问题,文中通过分析扰动时电压波动各阶段系统对惯性的需求,以及惯量阻尼参数对系统惯性的影响,提出了一种附加动态调节系数的惯量阻尼自适应控制策略,可以根据电压变化率与电压偏差灵活调节系统惯性,减小功率波动对母线电压的影响。建立了系统小信号模型,利用阻抗比判据分析了惯量阻尼参数的小信号稳定性。最后利用PSCAD/EMTDC仿真软件建立了直流微网仿真模型进行分析,验证了控制策略的有效性。DC micro-grid gets rid of considering factors such as frequency and phase,and the topology is simple and easy to control.But based on a large number of power electronic converter interfaces,the inertia of the DC microgrid is low,which will affect the safe and stable operation of the micro-grid in severe cases.In response to this problem,this paper proposes an adaptive control strategy of inertia damping with additional dynamic adjustment coefficient by analyzing the inertia requirements of the system at various stages of voltage fluctuations and the influence of inertia damping parameters on the system inertia,which can adjust the system inertia flexibly according to the voltage change rate and voltage deviation to reduce the influence of power fluctuations on the bus voltage.The small-signal model of the system is established,and the small signal stability of inertia damping parameters is analyzed by the impedance ratio criterion.Finally,the PSCAD/EMTDC simulation software is used to establish a DC micro-grid simulation model for analysis and verify the effectiveness of the proposed control strategy.

关 键 词：直流微网 虚拟直流发电机 阻抗比 自适应控制策略 惯量阻尼 

分 类 号：TM912[电气工程—电力电子与电力传动]