A New Indicator of Transient Stability for Controlled Islanding of Power Systems: Critical Islanding Time
A New Indicator of Transient Stability for Controlled Islanding of Power Systems: Critical Islanding Time
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DOI：
10.3390/en11112975
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发表时间：
2018-11
期刊：
影响因子：
3.2
通讯作者：
Zhenzhi Lin;Yuxuan Zhao;Shengyuan Liu;F. Wen;Yi Ding;Li Yang;Chang Han;Hao Zhou;Hongwei Wu
中科院分区：
文献类型：
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作者：
Zhenzhi Lin;Yuxuan Zhao;Shengyuan Liu;F. Wen;Yi Ding;Li Yang;Chang Han;Hao Zhou;Hongwei Wu
孤岛后的暂态稳定是至关重要的，因为如果在创建的岛屿中不能保持暂态稳定，受控的孤岛策略是不可行的。针对基于慢相干的可控孤岛策略，提出了一种新的暂态稳定性指标，即临界孤岛时间（CIT），用于确定所创建的所有孤岛是否都是暂态稳定的。然后，定义稳定孤岛区间（SII），确定稳定孤岛的合适时间框架。在新英格兰试验系统-纽约互联系统上进行了仿真，验证了临界孤岛时间和稳定孤岛间隔的特性。仿真结果表明，所提出的CIT和SII指标可以很容易地反映出何时孤岛的答案。这两个指标有利于电力调度员保持电力系统的暂态稳定，防止大面积停电。
Transient stability after islanding is of crucial importance because a controlled islanding strategy is not feasible if transient stability cannot be maintained in the islands created. A new indicator of transient stability for controlled islanding strategies, defined as the critical islanding time (CIT), is presented for slow coherency-based controlled islanding strategies to determine whether all the islands created are transiently stable. Then, the stable islanding interval (SII) is also defined to determine the appropriate time frame for stable islanding. Simulations were conducted on the New England test system–New York interconnected system to demonstrate the characteristics of the critical islanding time and stable islanding interval. Simulation results showed that the answer for when to island could be easily reflected by the proposed CIT and SII indicators. These two indicators are beneficial to power dispatchers to keep the power systems transiently stable and prevent widespread blackouts.