异步联网后云南电网的频率特性及高频切机方案  

Frequency Characteristics of Yunnan Power Grid and Corresponding Over-Frequency Generator Tripping Scheme After Asynchronous Interconnection

作　　者：周磊[1] 张丹 刘福锁[1] 黄伟 李威[1] 吴琛 

机构地区：[1]国电南瑞科技股份有限公司,南京211100 [2]云南电力调度控制中心,昆明650011

出　　处：《南方电网技术》2016年第7期17-23,共7页Southern Power System Technology

摘　　要：异步联网后云南电网作为小负荷、大送出的多直流送端电网,频率稳定问题成为威胁电网安全运行的主要风险。研究了负荷模型、调速器参数对频率稳定性的影响,提出适应异步联网后多直流外送的送端电网高频切机协调配置原则,通过时域仿真对比分析了4种高频切机备选方案的适应性,提出了适应异步联网运行要求的送端电网高频切机方案。Frequency stability will become the main security risk of Yunnan Power Grid as multi-DC sending end with small load and large sending-power after the asynchronous interconnection with CSG. The influences of load model and governor parameters on fre-quency characteristics are investgated. The principle of coordination and optimization of over-requency generator tripping are proposed. Based on the simulation and analysis of 4 alternative schemes,the over-frequency generator tripping scheme is proposed for Yunnan Power Grid to meet the requirements of asynchronous interconnection.

关 键 词：异步联网 多回直流闭锁 频率特性 高频切机 

分 类 号：TM743[电气工程—电力系统及自动化]