MMC-RPC的虚拟同步机建模及控制方法  

Modeling and Control of Virtual Synchronous Generator Based on MMC-RPC

作　　者：宋平岗 周振邦 董辉 文发 

机构地区：[1]华东交通大学电气与自动化工程学院,江西南昌330013 [2]中车株洲电力机车研究所有限公司,湖南株洲412001

出　　处：《控制与信息技术》2018年第1期26-32,共7页CONTROL AND INFORMATION TECHNOLOGY

基　　金：国家自然科学基金项目(51367008)

摘　　要：牵引供电系统是一个典型的弱交流系统,存在系统惯性低、抗扰动性差等缺陷。模块化多电平换流器结构的铁路功率调节器(MMC-RPC)可有效治理牵引网中的电能质量问题,但传统控制方式下的MMC-RPC无法对牵引供电系统提供惯性支撑,其输出功率反而会受弱交流系统的影响。虚拟同步机技术使换流器具有同步电机的内外特性,能有效地为电力系统提供惯性支撑。文章针对MMC-RPC左侧换流器采用虚拟同步电机内环、功率外环的控制策略,并建立小信号模型进行分析,最后通过仿真验证了该控制策略的可行性。As a typical weak AC system, traction power supply system has some disadvantages such as low inertia and poor resistance to disturbance. MMC-RPC （modular multilevel converter - railway static power conditioner） can control the power quality problems in traction network effectively. However, under the traditional control mode, MMC-RPC cannot provide inertia support to traction power supply system, the output power of MMC-RPC will be affected by the weak AC system. The technology of virtual synchronous machine makes converter have the internal and external characteristics of synchronous motor and effectively provide inertia support for power system. Virtual synchronous generator inner control loop and power outer control loop were used for the left side converter of MMC-RPC. Small signal model was established, finally, the feasibility of the control strategy was verified by simulation.

关 键 词：牵引供电系统 虚拟同步机 铁路功率调节器 模块化多电平换流器 小信号模型 

分 类 号：U223[交通运输工程—道路与铁道工程] TM74[电气工程—电力系统及自动化]