溪洛渡、糯扎渡±800 kV特高压直流输电规模对南方电网安全稳定影响研究溪洛渡、糯扎渡±800 kV特高压直流输电规模对南方电网安全稳定影响研究.doc

2009年 第3卷 第1期 南方电网技术 交直流并联电网 2009，Vol. 3，No. 1 SOUTHERN POWER SYSTEM TECHNOLOGY AC/DC Parallel Grid 文章编号：1674-0629(2009)01-0001-04 中图分类号：TM712 文献标志码：A 溪洛渡、糯扎渡直流输电规模对南方电网安全稳定影响研究 周保荣1，金小明1，吴小辰1，赵勇1，柳勇军1，林峰2，伍文城3，钟杰峰4 （1. 南方电网技术研究中心，广州510623；2. 中南电力设计研究院，武汉430071；3. 西南电力设计研究院，成都610021；4. 广东省电力设计研究院，广州510600） 摘要：考虑云南电网的负荷水平、开机方式、网架变化、直流运行方式等因素变化，从输电能力、安全稳定及电网适应性角度研究溪洛渡和糯扎渡直流采用5 000 MW或6 400 MW输电规模对南方电网影响，涉及南方电网的输电能力、安全稳定及电网适应性的规律。研究表明结论是：直流规模越大，输电能力越高，但直流提高送电能力的比值越低；直流规模增大有利于减轻云南电网交流通道潮流，且在其他直流或交流线路发生严重故障时使云南电网处在较为稳定的状态，尽管在溪洛渡和糯扎渡直流直流本身发生双极故障时其本身需要切除的机组容量也增多，但发生其他直流或云南交流严重故障时系统稳定性略高，且有利于减轻云南电网交流通道潮流；。研究还表明，受端广东电网能承受这种能够适应不同的直流规模，这种；直流规模对南方电网系统主导振荡模式的阻尼影响也不大。 关键词：特高压直流；安全稳定；多直流并列运行系统 The Influences of the Capacity Capacities of Xiluodu and Nuozhadu HVDC Projects HVDC on Security and Stability of China Southern Power Grid (CSG) ZHOU Bao-rong1, JIN Xiao-ming1, WU Xiao-chen1, ZHAO Yong1, LIU Yong-jun1, LIN Feng2, WU Wen-cheng3, ZHONG Jie-feng4 (1. CSG Technology Research Center, Guangzhou 510623, China; 2. Central Southern China Electric Power Institute, Wuhan 430071,China; 3. South West China Electric Power Design Institute, Chengdu 610021,China; 4. Guangdong Electric Power Design Institute, Guangzhou 510600, China;) Abstract: Considering variations ofTaking into account the factors of load level, generation unit commitments, and HVDC operation mode in Yunnan Power System and generation unit commitments, the paper examines the the 5 000 MW and 6 400 MW capacities influences of the Xiluodu and Nuozhadu HVDC projects Xiluodu and Nuozhadu HVDC with 5 000 MW or 6 400 MW capacity are examined to have concern about the influence of the capicities on CSG Security and Stability. in the view of The study involves the transmission capacity, the security and stability, and the adaptation of power gridCSG. It is concluded that the transmission limit of Yunnan power Power grid System becomes largerwill increase as the capacities of the HVDC projects increase, but the growth rat