| 引用本文: | 王亚兵,童晓阳,赵紫斌,董星星,Sohail Manzoor.基于新型正序故障分量综合阻抗的有源配电网纵联保护[J].电力自动化设备,2025,45(2):103-109. |
| WANG Yabing,TONG Xiaoyang,ZHAO Zibin,DONG Xingxing,Manzoor Sohail.Pilot protection of active distribution network based on novel positive-sequence fault component comprehensive impedance[J].Electric Power Automation Equipment,2025,45(2):103-109. |
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| 摘要: |
| 分布式电源接入配电网改变了传统配电网的拓扑结构，使故障特性发生了改变，常规的配电网电流保护将失去选择性。针对该问题，提出一种基于新型正序故障分量综合阻抗的有源配电网纵联保护方法。对不同类型分布式电源接入的线路发生区/内外故障时的正序故障电压、电流故障特征进行分析。利用区段两端电压、电流正序故障分量，构造两侧的线路推算阻抗，将它们相减后得到新型的综合阻抗。将综合阻抗与线路阻抗之比作为阻抗系数，进而构造区、内外短路故障的保护判据。通过大量仿真验证了所提保护算法的有效性，其能够准确地检测出短路故障，不受故障类型、故障位置、分布式电源类型、渗透率、分布式电源退出的影响，具有较强的抗过渡电阻能力，且灵敏度较高。 |
| 关键词: 有源配电网 继电保护 纵联保护 分布式电源 正序故障分量 新型综合阻抗 短路故障 |
| DOI：10.16081/j.epae.202411020 |
| 分类号:TM77 |
| 基金项目: |
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| Pilot protection of active distribution network based on novel positive-sequence fault component comprehensive impedance |
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WANG Yabing, TONG Xiaoyang, ZHAO Zibin, DONG Xingxing, Manzoor Sohail
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School of Electrical Engineering, Southwest Jiaotong University, Chengdu 611756, China
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| Abstract: |
| The access of distributed generators to distribution network changes the topology of the traditional distribution network, which changes fault characteristics, and conventional distribution network current protection will lose its selectivity. Aiming at this problem, a novel protection method based on the comprehensive impedance of positive sequence fault component is proposed. The fault characteristics of positive-sequence fault voltages and currents are analyzed when internal and external faults occur in the line with different types of distributed generations. The positive-sequence fault components of voltage and current at both ends of the section are used to calculate the estimated line impedances on both sides, the new comprehensive impedance is obtained by their subtraction. Taking the ratio of comprehensive impedance to line impedance as impedance coefficient, and then the protection criterion of internal and external short circuit faults is constructed. The effectiveness of proposed protection algorithm is verified by a large number of simulation experiments. It can accurately detect short circuit faults, and is not affected by fault type, fault location, type and permeability of distributed generator, distributed generator exit, and has high sensitivity and strong resistance to transition resistance. |
| Key words: active distribution network relay protection pilot protection distributed generator positive-sequence fault component new comprehensive impedance short fault |
