| 引用本文: | 王元上,袁 至,王维庆.提升抗时延抖动和数据异常性能的配电网故障自同步5G差动保护方案[J].电力系统保护与控制,2024,52(5):139-147.[点击复制] |
| WANG Yuanshang,YUAN Zhi,WANG Weiqing.Self-synchronizing 5G differential protection scheme for distribution network faults withimproved performance against delay jitter and data anomalies[J].Power System Protection and Control,2024,52(5):139-147[点击复制] |
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| 摘要: |
| 配电网5G差动保护信道的来回时延不等导致传统同步算法无法应用，需要增加额外的同步装置。另外，5G信道存在时延抖动和数据异常等问题会对保护的可靠性产生影响。针对这些问题，首先提出了基于变频插值的故障自同步法，在保护装置启动后利用插值法处理故障前特定时刻数据窗来实现同步误差校正。以此为基础，分析保护可能面临的异常数据特征，提出了考虑舍去极值的Hausdorff故障判别算法。最后设计了一种能够提升抗时延抖动和数据异常性能的配电网故障自同步5G差动保护方案。在PSCAD对方案进行仿真验证，结果表明所提方案能够在不增设额外同步装置的前提下有效提升抗时延抖动和数据异常的性能，保证发生各类故障和存在大噪声时的保护可靠性。该方案可为配电网5G差动保护的可靠性提供保障。 |
| 关键词: 5G通信 差动保护 时延抖动 时间同步 配电网 |
| DOI：10.19783/j.cnki.pspc.231321 |
| 投稿时间：2023-10-11修订日期：2024-01-01 |
| 基金项目:新疆维吾尔自治区重大科技专项资助(2022A01001- 4)；国家自然科学基金项目资助(52067020) |
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| Self-synchronizing 5G differential protection scheme for distribution network faults withimproved performance against delay jitter and data anomalies |
| WANG Yuanshang,YUAN Zhi,WANG Weiqing |
| (Engineering Research Center Renewable Energy Power Generation and Grid-connected Control,
Ministry of Education, Xinjiang University, Urumqi 830017, China) |
| Abstract: |
| The unequal round-trip delay of 5G differential protection channels in distribution networks leads to an inability to apply traditional synchronization algorithms and the need to add additional synchronization devices. In addition, the 5G channel has problems such as delay jitter and data anomalies. These will have an impact on the reliability of the protection. To address these problems, a fault self-synchronization method based on variable frequency interpolation is first proposed, where the interpolation method is used to process the data window at a specific moment before the fault after the protection device is activated to realize the synchronization error correction. Based on this, the abnormal data characteristics that the protection may face are analyzed, and the Hausdorff fault discrimination algorithm considering rounded poles is proposed. Finally, a 5G differential protection scheme for distribution network fault self-synchronization that can improve the performance against delay jitter and data anomalies is designed. The scheme is simulated and verified in PSCAD, and the results show that the proposed scheme can effectively improve the performance of anti-delay jitter and data anomaly without additional synchronization devices, and ensure the reliability of protection in the event of various types of faults and the presence of large noise. The proposed scheme can guarantee the reliability of 5G differential protection for distribution networks. |
| Key words: 5G communication differential protection delay jitter time synchronization distribution networks |
