| 引用本文: | 蔡颖倩,王钢,樊晨曦,李海锋,张俊潇.利用故障全过程信息的消弧线圈接地系统间歇性接地故障选线方法[J].电力系统保护与控制,2017,45(9):9-17.[点击复制] |
| CAI Yingqian,WANG Gang,FAN Chenxi,LI Haifeng,ZHANG Junxiao.Faulty line selection based on information in the whole process of intermittent earth fault in resonant grounding distribution networks[J].Power System Protection and Control,2017,45(9):9-17[点击复制] |
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| 摘要: |
| 在间歇性接地故障全过程中，各种故障特征的强弱随时间推移而变化，提出综合利用故障全过程信息的选线方法。通过对接地故障全过程进行分阶段处理，分别利用特征频带暂态能量特征量和零序有功功率稳态特征量进行计算，从而实现对接地故障全过程中暂态与稳态特征的充分利用，提高单一选线方法的准确性和灵敏性。其中，在具体分析相控式消弧线圈输出电流高频特性的基础上，提出能有效消除其高频分量影响的特征频带暂态能量幅值判据。仿真结果表明，所提选线方法对于相控式消弧线圈接地系统中所发生的含间歇性接地故障在内的各类接地故障均能实现其可靠的故障选线。 |
| 关键词: 故障选线 间歇性接地 相控式消弧线圈 暂态能量 零序有功功率 |
| DOI：10.7667/PSPC161641 |
| 投稿时间：2016-09-30修订日期：2016-12-20 |
| 基金项目:国家自然科学基金项目(51477057) |
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| Faulty line selection based on information in the whole process of intermittent earth fault in resonant grounding distribution networks |
| CAI Yingqian,WANG Gang,FAN Chenxi,LI Haifeng,ZHANG Junxiao |
| (School of Electric Power, South China University of Technology, Guangzhou 510641, China;Guangdong Power Grid Development Research Institute Co., Ltd., Guangzhou 510080, China) |
| Abstract: |
| During the whole process of intermittent earth fault, the significance of each fault feature changes over time. This paper presents a faulty line selection method based on information in the whole process of intermittent earth fault. First the stages of earth fault are divided. Then the algorithms are designed accordingly utilizing the transient component of selected frequency band (SFB) and the steady component of zero sequence active power, in order to make full use of both transient and steady fault features in the whole process, and to maximize the effect of each algorithm. Considering the high-frequency output characteristic of Petersen coil based on thyristor controlled reactor (TCR), a new criterion of transient power magnitude of SFB is designed to avoid the negative effects of the high-frequency components. According to simulation results, the proposed method has a high accuracy and reliability in faulty line selection of different kinds of single-phase-to-ground faults in resonant grounding system with Petersen coil based on TCR, including intermittent earth faults. This work is supported by National Natural Science Foundation of China (No. 51477057). |
| Key words: faulty line selection intermittent earth fault Petersen coil based on TCR transient power zero-sequence active power |
