| 引用本文: | 陈雷,高厚磊,樊占峰.分布式母线差动保护耐同步误差能力分析[J].电力自动化设备,2018,(9): |
| CHEN Lei,GAO Houlei,FAN Zhanfeng.Analysis of synchronization error enduring capacity of distributed bus-bar current differential protection[J].Electric Power Automation Equipment,2018,(9): |
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| 摘要: |
| 提出了最小同步误差允许裕度角的概念，用于描述分布式母线差动保护判据耐同步误差能力，推导得到表征同步误差对差动电流影响程度的相移系数。详细分析了母线结构、电流互感器饱和、制动系数以及不同步单元电流幅值和数量等因素对最小同步误差允许裕度角的影响方式，得出该裕度角的理论分析值。利用PSCAD/EMTDC建立了典型结构的母线系统模型，对理论分析进行了全面的仿真验证。验证结果表明，最小同步误差允许裕度角的理论值既可检验现有保护方案中各数据处理环节产生的同步误差是否超出保护承受能力，又可为判断各种同步方案和自同步技术是否符合母线差动保护的要求提供参考。 |
| 关键词: 分布式母线差动保护 耐同步误差能力 相移系数 最小同步误差裕度角 影响因素 |
| DOI：10.16081/j.issn.1006-6047.2018.09.030 |
| 分类号:TM77 |
| 基金项目:许继集团科研项目(SGTYHT/14-JS-190) |
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| Analysis of synchronization error enduring capacity of distributed bus-bar current differential protection |
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CHEN Lei1, GAO Houlei1, FAN Zhanfeng2
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1.Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education, Shandong University, Jinan 250061, China;2.XJ Group Corporation, Xuchang 461000, China
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| Abstract: |
| The concept of the minimum synchronization error allowing angle is proposed to describe the synchronization error enduring capacity of the distributed bus-bar current differential protection, and the phase shift coefficient representing the impact of synchronization error on the difference current is deduced. The influencing factors of the minimum synchronization error allowing angle, i. e. bus structure, current transformer saturation, restraint coefficient, asynchronous unit number and amplitude of asynchronous currents are analyzed in detail, by which the theoretical value of the minimum synchronization error allowing angle is deduced. The PSCAD/EMTDC-based models of bus-bar systems with typical structure are built to verify the theoretical analysis. The theoretical value of the minimum synchronization error allowing angle can test whether the synchronization error generated by each data processing part in the protection scheme exceeds the enduring capacity of the protection and provide a reference for judging whether the synchronization schemes and bus protection schemes adopting self-synchronization technology meet the requirements of bus-bar current differential protection. |
| Key words: distributed bus-bar current differential protection synchronization error enduring capacity phase shift coefficient minimum synchronization error allowing angle influencing factors |
