柔性直流输电系统交直流并列运行与孤岛运行方式间的切换控制  

Switching control between AC-DC parallel and islanded operations of VSC-HVDC transmission system

作　　者：文安 邓旭[2] 魏承志 寻斌斌 邓建俊 黄维芳[3] 莫天文 田霖[3] 

机构地区：[1]南方电网科学研究院,广东广州510080 [2]浙江大学电气工程学院,浙江杭州310027 [3]中国南方电网电力调度控制中心,广东广州510623

出　　处：《电力自动化设备》2014年第7期99-106,共8页Electric Power Automation Equipment

基　　金：广东省第三批领军人才专项资金资助项目~~

摘　　要：首先分析了系统在交直流并列运行和孤岛运行方式下的控制策略,基于此提出了系统从交直流并列运行转为孤岛运行和从孤岛运行恢复到交直流并列运行的切换控制方法。以某实际工程参数为例在PSCAD/EMTDC仿真平台上搭建了系统仿真模型,对所提出的切换控制方法进行了仿真验证。结果表明,所设计的切换控制方法能及时检测出系统的运行状态,并自动进行相关控制方式的切换,在切换过程中系统各电气量没有剧烈波动,不会影响系统的安全稳定运行。The control strategy of VSC-HVDC transmission system is analyzed respectively in AC-DC parallel operating mode and islanded operating mode,based on which,the strategy of mode switching control is pro- posed. Based on the parameters of an actual project,a system simulation model is established on PSCAD/ EMTDC platform and the proposed control strategy is verified by simulation. Results show that,it detects the operating conditions of VSC-HVDC transmission system timely and switches the corresponding control strategy automatically. The electrical parameter fluctuation during mode switching is slight and the stable system operation is not affected.

关 键 词：柔性直流输电 交直流并列运行 孤岛运行 模式切换 控制 仿真 

分 类 号：TM721.1[电气工程—电力系统及自动化]