| 引用本文: | 陈罗成,黄轶翔,李银红.适用于不同类型新能源接入的相间距离保护整定新方法[J].电力自动化设备,2026,46(1):209-216,224 |
| CHEN Luocheng,HUANG Yixiang,LI Yinhong.New phase distance protection setting method applicable to different types of new energy sources[J].Electric Power Automation Equipment,2026,46(1):209-216,224 |
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| 摘要: |
| 新能源的故障特性与传统同步电源存在差异，这导致在含不同类型新能源的交流电网中，基于正序助增系数的相间距离保护整定方法可能无法得到正确整定值。基于新能源的整定计算用模型，修正了新能源接入后的故障计算公式。通过研究传统交流电网中支路电流比值的分布规律，探讨了基于正序助增系数的整定方法应用于新能源接入电网时的不足。提出了一种适用于不同类型新能源接入的相间距离保护整定新方法。根据待整定保护计算域内的新能源类型，设置需考虑的故障类型。基于不同故障类型下的故障电气量分布特点，采用对应的整定计算公式。利用IEEE 39节点系统，证明了所提方法能兼顾整定正确性和整定效率。 |
| 关键词: 不同类型新能源 相间距离保护 整定计算 正序助增系数 故障类型 选择性 |
| DOI：10.16081/j.epae.202510001 |
| 分类号:TM77 |
| 基金项目:国家自然科学基金资助项目(52207107) |
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| New phase distance protection setting method applicable to different types of new energy sources |
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CHEN Luocheng, HUANG Yixiang, LI Yinhong
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State Key Laboratory of Advanced Electromagnetic Technology, Huazhong University of Science and Technology, Wuhan 430074, China
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| Abstract: |
| The fault characteristics of new energy sources are different from those of traditional synchronous power sources, which leads to the fact that the phase distance protection setting method based on the positive-sequence auxiliary increasing coefficient may not be able to obtain the correct setting value in AC power grid containing different types of new energy sources. Based on the models of new energy sources used for setting calculation, the fault calculation formulas considering new energy sources connected are modified. By studying the distribution law of the branch current ratio in the traditional AC power system, the shortcomings of the setting calculation method based on the positive-sequence auxiliary increasing coefficient in the grid containing new energy sources are discussed. A new phase distance protection setting method applicable to different types of new energy sources is proposed. According to the types of new energy sources in the calculation area of the protection to be set, the fault types to be considered are determined. Based on the distribution characteristics of the fault electric quantities under different fault types, the corresponding setting formulas are adopted. Using IEEE 39-node system, it is proved that the proposed method can balance the correctness and efficiency of setting. |
| Key words: different types of new energy sources phase distance protection setting calculation positive-sequence auxiliary increasing coefficient fault type selectivity |
