基于故障分量的T接线路电流纵差保护新判据
分析了基于故障分量的传统差动保护在复平面上的动作特性,指出传统原理在保障内部故障的灵敏性与外部故障的可靠性方面存在一定的限制。提出了结合电流相位差的T接线路电流差动保护新原理,实现了制动项在区内外故障分别体现为驱动和制动两种状态,同时提高了差动保护的灵敏性和可靠性。理论分析表明新原理在内部故障的灵敏性和外部故障的可靠性方面均优于传统判据,具有良好的抗电流互感器饱和性能。仿真实验证明了新原理的有效性。...
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| Published in | 电力系统保护与控制 Vol. 39; no. 15; pp. 1 - 6 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
电力系统国家重点实验室(清华大学),北京,100084
2011
天津大学电力系统仿真控制教育部重点实验室,天津,300072%英国AREVA输配电自动化公司,斯塔福德郡,ST17 4LX,英国 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1674-3415 |
| DOI | 10.3969/j.issn.1674-3415.2011.15.001 |
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| Summary: | 分析了基于故障分量的传统差动保护在复平面上的动作特性,指出传统原理在保障内部故障的灵敏性与外部故障的可靠性方面存在一定的限制。提出了结合电流相位差的T接线路电流差动保护新原理,实现了制动项在区内外故障分别体现为驱动和制动两种状态,同时提高了差动保护的灵敏性和可靠性。理论分析表明新原理在内部故障的灵敏性和外部故障的可靠性方面均优于传统判据,具有良好的抗电流互感器饱和性能。仿真实验证明了新原理的有效性。 |
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| Bibliography: | 41-1401/TM super-imposed fault component; current differential protection; sensitivity; reliability; current phase difference; current transformer saturation The paper analyzes operation characteristics of super-imposed fault component based traditional differential protection principles in the complex plane.It points out that there are some limitations for traditional principles in ensuring sensitivity of internal fault and reliability of external fault.Thus,it proposes a novel current differential protection principle for T-type transmission line combining with current phase difference.Restraint unit of the proposed principle takes the role of drive and restraint respectively in the case of internal and external faults.Therefore,both the sensitivity and reliability of protection are improved.Theoretical analysis shows that the novel principle is superior to traditional principles in ensuring sensitivity of internal fault and reliability of external fault.Besides,the proposed principle also have excellent perf |
| ISSN: | 1674-3415 |
| DOI: | 10.3969/j.issn.1674-3415.2011.15.001 |