A method of voltage stability evaluation for branch and generator outage contingencies
A method of voltage stability evaluation for branch and generator outage contingencies
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DOI：
10.1109/tpwrs.2003.818740
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发表时间：
2004-02
影响因子：
6.6
通讯作者：
N. Yorino;H.Q. Li;S. Harada;A. Ohta;H. Sasaki
中科院分区：
文献类型：
--
作者：
N. Yorino;H.Q. Li;S. Harada;A. Ohta;H. Sasaki
本文提出了一种快速计算方法来评估分支停电和发电机停电事故下鞍节点分岔的负荷功率裕度。发电机故障时的电压稳定性评估是一个新的课题，而分支故障时的电压稳定性评估则有各种各样的研究。该方法是基于传统的线性灵敏度方法。通过考虑潮流方程的非线性和使用快速线搜索技术，改进了线性估计。与现有方法相比，精度有了很大提高。通过IEEE 14-，30-和57节点系统证明了所提出的方法的有效性。在发电机停运和所有分支停运（线路开路停运）事故下，负荷功率裕度的估计误差分别不超过5%和15%。
This paper proposes a fast computation method to evaluate the load power margins with respect to saddle node bifurcations under branch outage as well as generator outage contingencies. The voltage stability evaluation for generator outages is a new topic, while there exist various studies for the branch outage contingencies. The proposed method is based on the conventional linear sensitivity method. The linear estimations are improved by taking into account nonlinearities of the power flow equations and by using a fast line search technique. Compared with existing methods, the accuracy is considerably improved. The effectiveness of the proposed method is demonstrated through IEEE 14-, 30-, and 57-bus systems. The estimation errors in load power margins are not more than 5% for generator outage and 15% for all branch outage (route open outage) contingencies.