LCC与VSC型直流馈入对弱受端电网特性的影响  

Impact of LCC-HVDC and VSC-HVDC Infeed on Weak-Receiving-End Grid Characteristics

作　　者：郑超[1] 杨金刚 滕予非[3] 李惠玲[1] 吕思卓[1] 

机构地区：[1]中国电力科学研究院,北京市100192 [2]国网冀北电力有限公司经济技术研究院,北京市100045 [3]国网四川省电力公司电力科学研究院,成都市610072

出　　处：《电力建设》2016年第4期84-90,共7页Electric Power Construction

基　　金：国家高技术研究发展计划项目(863计划)(2011AA05A105);国家电网公司科技项目(XT71-14-040)~~

摘　　要：随着柔性直流输电(voltage source converter based high voltage direct current,VSC-HVDC)直流电压等级提升和传输容量增大,其在大容量远距离资源优化配置中将发挥更加重要的作用。以往的研究中,大多利用电磁暂态仿真软件,针对虚拟构建的小电网,仿真分析VSC-HVDC的技术性能。针对实际交流电网的VSC-HVDC动态性能验证等研究,则少有报道。本文首先针对PSD-BPA中新近开发的对应实际电网换相换流器高压直流(line commutated converter based high voltage direct current,LCC-HVDC)工程的DA卡仿真模型以及VSC-HVDC仿真模型,分析两者的技术特点。在此基础上,面向西藏藏中弱交流受端电网,仿真对比2种直流供电方案下,受端电网大扰动冲击后的暂态恢复特性。仿真研究结果为应用VSC-HVDC改善弱受端电网受扰特性和提升电网稳定水平提供了技术支撑。With the DC voltage level upgrading and transmission capacity increasing,the voltage source converter based high voltage direct current（ VSC-HVDC） plays a more important role in the optimal allocation of large capacity resources over a long distance. In the previous studies,the technology performance of VSC-HVDC was analyzed by using the virtual small grid and electromagnetic transient simulation software. The study results of the dynamic performance validation for the actual AC grid were reported rarely. In this paper,the DA simulation model in line commutated converter based high voltage direct current（ LCC-HVDC） and VSC-HVDC simulation models developed newly by PSD-BPA are introduced and the technical characteristics of these models are analyzed firstly. On this basis,aimed to the Tibetan AC weak power grid,the transient recovery characteristics of receiving-end grid with large disturbance impact are compared under two different power transmission programs. The simulation results can provide technical support to apply VSC-HVDC to improve the disturbance characteristics of weak-receiving-end grid and grid stable level.

关 键 词：高压直流输电(HVDC) 柔性直流(VSC-HVDC) 机电暂态 仿真模型 恢复特性 

分 类 号：TM72[电气工程—电力系统及自动化]