一种基于功角计算的振荡闭锁方案

发布时间：2018-04-15 14:20

本文选题：电力系统振荡 + 振荡闭锁　；参考：《电力系统自动化》2015年02期

【摘要】：针对现有振荡闭锁措施在应用中存在的不足,研究了一种基于功角计算的振荡闭锁方案。新方案将再故障时刻的系统运行功角作为识别振荡程度的依据,与根据失稳条件所确定的边界判据相结合,在功角小于整定值时允许距离保护在振荡闭锁期间快速开放,功角较大时闭锁距离元件。研究结果表明,新判据原理直观,实现简单,能够定量地反映系统振荡进程,并与振荡周期自适应,改善了距离保护在振荡闭锁期间开放的性能;对系统两侧电势幅值不等的讨论提高了本方法应用的可靠性和适用性。基于PSCAD/EMTDC仿真结果验证了新方案的正确性。
[Abstract]:In view of the shortcomings of the existing oscillatory locking measures in application, an oscillatory latchup scheme based on power angle calculation is studied.The new scheme takes the running power angle of the system at the time of re-failure as the basis for identifying the degree of oscillation, and combines with the boundary criterion determined by the instability condition. When the power angle is less than the set value, the distance protection is allowed to open rapidly during the period of the oscillation lockdown.Lock the distance element when the power angle is large.The results show that the new criterion is intuitionistic, simple to realize, and can reflect the oscillation process quantitatively, and adapts to the oscillation period, and improves the performance of the distance protection open during the period of the oscillation lockout.The reliability and applicability of this method are improved by discussing the different amplitude of potential on both sides of the system.Simulation results based on PSCAD/EMTDC verify the correctness of the new scheme.
【作者单位】：新能源电力系统国家重点实验室华北电力大学;国家电网公司直流建设分公司;
【分类号】：TM773

【参考文献】