A distance protection scheme not affected by transient characteristic of capacitor voltage transformer for HV long transmission line

被引：0
|
作者：
机构：
[1] School of Electrical Engineering, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi Province
来源：
Jiao, Zaibin | 1600年 / Power System Technology Press卷 / 38期
基金：
中国国家自然科学基金;
关键词：
Accurate power frequency phasor extraction algorithm; Capacitor voltage transformer; Distance protection; Transient characteristic;
D O I：
10.13335/j.1000-3673.pst.2014.11.036
中图分类号：
学科分类号：
摘要：
Affected by transient characteristic of capacitor voltage transformer (CVT), the distance protection for HV transmission line is easily to mal-operate due to transient overreach, thus the secure and stable operation of power grid is affected. A new distance protection scheme that is not affected by the transient characteristics of CVT is proposed and its principle is as following: firstly, on the basis that the CVT can transmit and transform power frequency phasor, by means of the matrix pencil based accurate power frequency phasor extraction method the power frequency phasors of voltage and current at the position where the protection is installed are calculated; secondly, the voltage and current at the position of the long distance transmission line, where the protection is set, are calculated by Bergeron model; finally, coordinating with directional element and taking the setting point as the observation point, the fault point is located by traditional distance protection algorithm. The proposed principle is not affected by transient characteristic of CVT and the impacts of distributed parameters of the long distance transmission line are taken into account, thus the proposed distance protection scheme possesses a better performance, and the effectiveness of the proposed algorithm is validated by simulation results. ©, 2014, Power System Technology Press. All right reserved.
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页码：3180 / 3186
页数：6
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