新一代大容量调相机在电网中的应用研究  

Study on Application of New Generation Large Capacity Synchronous Condenser in Power Grid

作　　者：王雅婷[1] 张一驰[1] 周勤勇[1] 李志强[1] 姜懿郞 汤涌[1] 吴俊玲[1] 高超[1] 屠竞哲[1] 沈沉[2] 

机构地区：[1]中国电力科学研究院,北京市海淀区100192 [2]清华大学电机工程与应用电子技术系,北京市海淀区100084

出　　处：《电网技术》2017年第1期22-28,共7页Power System Technology

基　　金：国家电网公司科技项目(XT71-15-026)~~

摘　　要：研究了新一代调相机在我国特高压直流送受端的应用。首先结合直流对于调相机的技术需求,研究了调相机模型,提出基于不同时间尺度的次暂态、暂态、稳态3种运行特性。然后,基于酒泉—湖南直流风火打捆送端,从增加系统短路比、降低新能源高压脱网风险、抑制稳态过电压等角度研究了调相机在特高压直流送端的应用效果;基于华东多直流馈入受端电网,从提高直流多馈入短路比、降低多回直流同时换相失败的风险、提升严重故障下的系统电压稳定水平等角度研究了调相机在特高压直流受端电网的应用效果。最后,从设备角度提出新一代调相机在运行维护、无功响应特性等方面相较于传统调相机的技术优势,旨在为调相机后续投入工程运行提供技术支撑。Application of new synchronous condenser in UHVDC sending and receiving ends is analyzed in this paper. Firstly, considering technical requirements of UHVDC synchronous condenser, models of synchronous condenser are studied and subtransient/transient/steady characteristics are proposed for different time scales. Then for sending end of Jiuquan-Hunan wind-thermal-bundled UHVDC, application effects of synchronous condenser are discussed from aspects of increasing short circuit ratio, reducing risk of renewable energy overvoltage tripping and restraining steady-state overvoltage. For receiving end of multi-infeed HVDC transmission lines in East China, application effects of synchronous condenser are discussed from aspects of increasing multi-infeed short circuit ratio, reducing commutation failure risk of multiple HVDC, and improving voltage stability level under severe faults. Lastly, compared with traditional synchronous condenser, equipment advantages of new generation are proposed, such as operation maintenance, reactive response characteristics, etc, providing technical support for subsequent engineering application.

关 键 词：调相机 特高压直流 次暂态特性 强励 进相 新能源高压脱网 直流换相失败 

分 类 号：TM721[电气工程—电力系统及自动化]