Field Test and Analysis of Transient Characteristics of Current Transformer for DC Grounding Electrode Lines

被引：0
作者：
Zhu M. [1 ]
Ma Y. [1 ]
Luo Q. [2 ]
He Z. [3 ]
Liao Y. [1 ]
Tang B. [1 ]
机构：
[1] Electric Power Research Institute, Yunnan Power Grid Co., Ltd., China Southern Power Grid, Kunming
[2] Jiangsu Lingchuang Electric Automation Co., Ltd., Zhenjiang
[3] Measurement Center of Yunnan Power Grid Co., Ltd., Kunming
来源：
Gaodianya Jishu/High Voltage Engineering | 2023年 / 49卷 / 06期
关键词：
equivalent; field test; instantaneous artificial short circuit; step response; transient characteristics;
D O I：
10.13336/j.1003-6520.hve.20220649
中图分类号：
学科分类号：
摘要：
The transient step characteristics and field test methods of current transformers for DC grounding lines are of great significance for the control and protection of system and the detection and location of faults.For this reason, this paper proposes a combined field test scheme of step response characteristics under artificial short circuit and power failure in live operation, combined with the reality of the grounding electrode system. First of all, under the live operation of the grounding electrode system, the adaptability of the transient transmission characteristics of the transformer to the protection is verified through artificial short circuit faults. Then, the field synchronous closed-loop test system for DC current transformer step response is developed, and the output accuracy of step current source is improved through modular parallel connection and built-in standard waveform traceability adjustment method. Its output parameters are as follows: step amplitude 0~600 A adjustable, rise time ≤30 μs, and the maximum pulse width is 100 ms. Based on the test system, the step response time, rise time, delay time and other parameters of the grounding electrode DC current transformer are tested in the Funing converter station in China. The results show that the method can be employed to effectively evaluate the step response characteristics of the grounding electrode DC current transformer. © 2023 Science Press. All rights reserved.
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页码：2644 / 2651
页数：7
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