| 引用本文: | 康小宁,刘 琳,王 琦.基于WAMS的后备距离保护方案[J].电力自动化设备,2015,35(3): |
| KANG Xiaoning,LIU Lin,WANG Qi.Backup distance protection scheme based on WAMS[J].Electric Power Automation Equipment,2015,35(3): |
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| 摘要: |
| 西安交通大学 电气工程学院，陕西 西安 710049 |
| 关键词: 智能电网 WAMS 广域后备保护 距离保护 继电保护 故障测距 过渡电阻 |
| DOI： |
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| 基金项目:基金项目：国家自然科学基金资助项目（51037005） |
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| Backup distance protection scheme based on WAMS |
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KANG Xiaoning, LIU Lin, WANG Qi
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School of Electrical Engineering，Xi’an Jiaotong University，Xi’an 710049，China
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| Abstract: |
| A backup distance protection scheme based on WAMS（Wide Area Measurement System） is proposed，which transmits the impedance information of far-end system via WAMS and constructs the current relationship formula with the sequence component network. With the simultaneous frequency-domain equations，a linear fault location equation with three unknown coefficients is deduced，and with the fundamental-frequency and high-frequency components extracted by the matrix pencil method，the fault distance is obtained. The proposed scheme makes full use of the shared information and，unaffected by the frequency fluctuation，the system oscillation and the unknown far-end system impedance，it enhances the reliability and transition resistance enduring ability of protection. Its solving process is simple and fast，suitable for both single- and dual-loop line models. Simulation is carried out with EMTP and results show the accuracy and effectiveness of the proposed scheme. |
| Key words: smart grid WAMS wide-area backup protection distance protection relay protection electric fault location transition resistance |
