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There are some kinds of remedial action schemes that deal with sudden disturbance situations in a transmission network. Generator tripping with an SPS (Special Protection System) is one of the remedial action schemes, and it is a powerful and effective method of solving transient stability problems. When an extra-high-voltage transmission line that is transferring a large amount of power is tripped, generators designated by a SPS are tripped to prevent over-speeding of the generators. However, the tripping of generators can cause difficulties in the power system operation, and if large amounts of power are tripped, load shedding can occur. Therefore, it is desirable that a minimum number of generators is tripped in required stable conditions. For this purpose, an intelligent SPS is currently being developed to reduce the number of generator tripping events. In this paper, an application method involving fast valving and a braking resistor are analyzed as suitable action schemes for a SPS. 相似文献
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计及快关和切机的集成EEAC 总被引:2,自引:0,他引:2
EEAC理论已证明,在多机积分精度的含义上,EEAC方法是严格的直接法,这一理论还被推广到任意多群发的集成,多摆失稳模式以及任何复杂模型。在此基础上开发的集成EEAC软件,用智能的手段将EEAC和积分技术在多层次上集成,本文介绍了计及快关和切机的集动态EEAC,并给出了仿真结果,这一软件在精度上大大优于动态EEAC,并且保持了其快速性;同时还成功地解决了多摆问题,从而为在线刷新决策表的紧急控制决策 相似文献
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介绍了大亚湾核电站900 MW机组一次因电网三相短路故障诱发汽轮机超加速度保护动作,直至手动打闸停机的事件,对相关问题进行了分析,并提出了取消高压截止阀对超加速度保护响应的改进措施.通过完善相关涉网自动保护和控制策略,改善了电网及核电机组本身的安全稳定性. 相似文献
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汽轮发电机组采用快关汽门,是提高电力系统稳定性的一项有效措施。对于经长距离超高压输电线路连接到受端系统的远方电源,适于采用“持续快关”。沙角C厂共有3 台未配置旁路系统的660MW 机组。1996 年11 月29 日,在其中1台机组上成功地进行了“短暂快关”与“持续快关”试验。文章介绍了所得的试验结果 相似文献
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研究出一种将汽轮机调节系统与保安系统有机结合起来的快控阀,并对这种新型快控阀的工作原理以及结构特点进行了详细的介绍。 相似文献
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杜继伟 《电力科学与技术学报》2011,(3):90-95
汽轮发电机的励磁系统、汽门控制系统以及灵活交流输电系统(FACTS)的成员对电力系统的稳定性有很大的影响.针对含有FACTS(TCSC/SVC)的单机无穷大输电系统提出一种新型的励磁、汽门和FACTS的协调控制器,从而提高了电力系统的稳定性.在反馈线性化理论的基础上,该协调控制器对包含可控串联补偿( TCSC)、静止无... 相似文献
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A new flux-cored wire producing the deposited metal of high-chromium steel of the Fe–Cr–Ni–Mo–Mn–Si–Nb–Ti–B alloying system is described. The structure of the deposited metal and the composition of the hardening phases are determined. The role of borides in increasing the wear resistance and stability of the properties of the metal in hardfacing is analysed. 相似文献