高频切机措施对失步振荡中心迁移的影响
发布时间:2018-03-04 14:28
本文选题:失步振荡中心迁移 切入点:多重严重故障 出处:《电网技术》2017年01期 论文类型:期刊论文
【摘要】:为减小失步振荡中心迁移对系统解列的影响,基于两机系统失步振荡中心迁移的一般规律,研究了高频切机措施引起的等效电抗及等效电动势变化,得到了切机后失步振荡中心迁移的函数表达式。同时提出了切机后失步振荡中心迁移的临界曲线和临界区域,得到了高频切机措施影响失步振荡中心迁移的规律。结合实际电网发生多重严重故障的案例,在失步振荡过程中,高频切机措施会使失步振荡中心朝被切电源一侧迁移,在进行高频切机时,应尽快切除稳定性较差机组,避免孤立系统出现二次失步现象,有利于孤立系统快速恢复稳定。仿真算例对工程实践中增加预想故障类型,考虑第三道防线措施相互配合,和布置解列装置安装点具有指导意义。
[Abstract]:In order to reduce the influence of out-of-step oscillation center migration on the system decoupling, the equivalent reactance and equivalent electromotive force (EMF) caused by high-frequency cutting machine are studied based on the general law of out-of-step oscillation center migration in two-machine system. The functional expression of the migration of the out-of-step oscillation center after the cutting machine is obtained, and the critical curve and the critical region of the migration of the out-of-step oscillation center after the cutting machine are presented. The rule that high-frequency cutting measures affect the migration of out-of-step oscillation center is obtained. Combined with the case of multiple serious faults in actual power network, the high-frequency cutting measures will make the out-of-step oscillation center move to the side of the cut power supply in the process of out-of-step oscillation. In the process of high frequency cutting machine, the unit with poor stability should be removed as soon as possible, and the secondary out-of-step phenomenon of isolated system should be avoided, which is beneficial to the rapid restoration of stability of isolated system. It is of guiding significance to consider the coordination of the third line of defense and the arrangement of mounting points of the dismounting device.
【作者单位】: 华北电力大学电气与电子工程学院;中国电力科学研究院;西北电力调度信息中心;国网山西省电力公司朔州供电公司;
【基金】:国家电网公司总部科技项目“川藏联网及西北弱交流系统安全稳定特性及控制技术研究”~~
【分类号】:TM712
【相似文献】
相关期刊论文 前10条
1 胥威汀;刘俊勇;李e,
本文编号:1566023
本文链接:https://www.wllwen.com/kejilunwen/dianlidianqilunwen/1566023.html