| 引用本文: | 高厚磊,袁通,彭放,李林.逆变类电源接入条件下传统方向元件适应性分析[J].电力自动化设备,2025,45(2):150-158. |
| GAO Houlei,YUAN Tong,PENG Fang,LI Lin.Adaptability analysis of traditional directional element under inverter-based source integration[J].Electric Power Automation Equipment,2025,45(2):150-158. |
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| 摘要: |
| 逆变类电源(IBS)接入场景下，传统方向元件逐渐暴露出适应性问题，目前缺乏全面的理论分析。为此，结合逆变器控制策略和我国对IBS低电压穿越的最新要求，推导得出了IBS的故障特征；在此基础上，深入分析IBS和负荷在传统方向元件下所呈现出的相位特征，进一步考虑多种影响因素，定量给出了含IBS线路中传统方向元件的角度变化范围；利用PSCAD/EMTDC和现场录波数据验证理论分析的正确性。理论分析和仿真结果表明，IBS接入场景下，传统方向元件建立的理论基础不再成立，易导致误判发生，不满足继电保护的要求。 |
| 关键词: 逆变类电源 正序故障分量方向元件 90°接线方向元件 适应性分析 低电压穿越 继电保护 |
| DOI：10.16081/j.epae.202409026 |
| 分类号:TM77 |
| 基金项目:国家自然科学基金资助项目(52277109)；中国博士后科学基金面上资助项目(2023M732045) |
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| Adaptability analysis of traditional directional element under inverter-based source integration |
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GAO Houlei, YUAN Tong, PENG Fang, LI Lin
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College of Electrical Engineering, Shandong University, Jinan 250061, China
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| Abstract: |
| In the context of inverter-based source(IBS) integration, traditional directional elements are gra-dually revealing adaptability issues, and there is currently a lack of comprehensive theoretical analysis. To address this, combined with the inverter control strategies and the latest requirements for low-voltage ride-through(LVRT) of IBSs in China, the fault characteristics of IBS are deduced. Based on this, an in-depth analysis is conducted on the angle characteristics exhibited by IBS and load under traditional directional elements. Furthermore, considering various influencing factors, a quantitative angle range of traditional directional elements in lines with IBS is given. The correctness of the theoretical analysis is validated using PSCAD/EMTDC simulation and field data. Theoretical analysis and simulative results indicate that the theoretical foundation established by traditional directional elements is no longer valid in IBS access scenario, which is easy to lead to misjudgments and cannot meet the requirements of relay protection. |
| Key words: inverter-based source positive-sequence fault component directional element 90° connection directional element adaptability analysis low-voltage ride-through relay protection |
