新型虚拟同步发电机技术的并网控制策略研究  

Research on Grid-connected Control Strategy of New Virtual Synchronous Generator Technology

作　　者：郭有贵[1] 施明章 邓文浪[1] 李楚韵 GUO You-gui;SHI Ming-zhang;DENG Wen-Lang;LI Chu-yun(Xiangtan University,Xiongtan 411105,China;不详)

机构地区：[1]湘潭大学,信息工程学院,湖南湘潭411105 [2]国网湘潭供电公司,湖南湘潭411104

出　　处：《电力电子技术》2020年第8期53-57,共5页Power Electronics

摘　　要：为更好地将交流输出的可再生能源并网,针对传统并网逆变器的虚拟同步发电机(VSG)技术需经复杂的交-直-交变换。提出了基于VSG的矩阵变换器并网控制。首先提出了一种新型空间矢量脉宽调制(SVPWM)控制策略。然后将矩阵变换器作为VSG技术的主电路,通过控制系统实现对同步发电机惯性特性、频率响应特性及调压调频特性的有效模拟。该方法为交流输出的分布式能源的功率变换提供了一种可行方案。采用预并列单元设计,使VSG输出电压的相位跟踪电网电压的相位。通过仿真和实验验证了所提策略的有效性。In order to better connect the AC output of renewable energy to grid,the virtual synchronous generator(VSG)technology for traditional grid-connected inverters requires complex AC-DC-AC transformation.A VSG-based matrix converter grid-connected control is proposed.Firstly,a novel space vector pulse width modulation(SVPWM)control strategy is proposed.Then,the matrix converter is used as the main circuit of the VSG technology.The control system realizes the effective simulation of the inertia characteristics,frequency response characteristics and voltage regulation characteristics of the synchronous generator.This method provides a feasible solution for the power conversion of distributed energy sources with AC output.The pre-parallel cell design is used to track the phase of the VSG output voltage to the phase of the grid voltage.Effectiveness of the proposed strategy is verified by simulation and experiment.

关 键 词：虚拟同步发电机 矩阵变换器 空间矢量脉宽调制 

分 类 号：TM341[电气工程—电机]