海上风电M3C换流器虚拟同步发电机控制  

Virtual synchronous generator control strategy of M3C converter in fractional frequency offshore wind power system

作　　者：韩华春 宁联辉[2] 李辰辰 叶至斌 杨彩虹 HAN Huachun;NING Lianhui;LI Chenchen;YE Zhibin;YANG Caihong(State Grid Jiangsu Electric Power Co.,Ltd.Research Institute,Nanjing 211103,China;Xi′an Jiaotong University(State Key Laboratory of Electrical Insulation and Power Equipment),Xi′an 710049,China)

机构地区：[1]国网江苏省电力有限公司电力科学研究院,江苏南京211103 [2]西安交通大学(电工材料电气绝缘全国重点实验室),陕西西安710049

出　　处：《电力工程技术》2024年第6期78-87,132,共11页Electric Power Engineering Technology

摘　　要：文中在分频海上风电送出的场景下,针对模块化多电平矩阵式换流器(modular multilevel matrix converter,M3C)的控制策略展开研究,将M3C系统与传统旋转同步发电机系统在结构参数和运动方程上进行对比,分析M3C变频器模拟同步发电机外特性的可行性。以换流器参与系统频率调节和稳定系统电压为目标,基于虚拟同步发电机控制理论,设计M3C换流器虚拟同步发电机控制方案,建立一种适用于分频海上风电M3C换流器的控制策略。最后利用PSCAD/EMTDC仿真平台,验证了该控制策略的正确性,并在相同系统结构和参数下,将该控制策略同双dq变换的解耦控制策略进行对比仿真研究。结果表明,虚拟同步发电机控制策略能够使变频器具有惯性和阻尼特性,可以参与系统频率调节,并且具有良好的控制响应特性。In this paper,the control strategy of modular multilevel matrix converter(M3C)is studied in the scenario of fractional frequency offshore wind power.The M3C system is compared with the traditional rotating synchronous generator system in terms of structural parameters and motion equations,and the feasibility of the M3C inverter to simulate the external characteristics of the synchronous generator is analyzed.With the goal of converter participating in system frequency regulation and stabilizing system voltage,based on the control theory of virtual synchronous generator(VSG),the control scheme design of virtual synchronous generator of M3C converter is completed,and a control strategy suitable for fractional frequency offshore wind power M3C converter is established.Finally,using PSCAD/EMTDC simulation platform,the correctness of this control strategy is verified.With the same system structure and parameters,the control strategy is compared with the decoupling control strategy of double dq coordinate transformation.The results show that the VSG control strategy can make the frequency converter have inertia and damping characteristics.The VSG control can participate in the system frequency regulation,and has good control response characteristics.

关 键 词：海上风力发电 分频输电系统(FFTS) 模块化多电平矩阵式换流器(M3C) 系统频率调节 虚拟同步发电机控制 惯性阻尼特性 

分 类 号：TM72[电气工程—电力系统及自动化]