Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

Article retrieval

文章检索

首页 >> 文章检索 >> 最新索引

直流分量对变压器差动?;び跋斓姆抡娣治?/h3>
来源:pc蛋蛋预测发布时间:2018-12-17 13:17 浏览次数:8
直流分量对变压器差动?;び跋斓姆抡娣治?/span>
 
邵美才1,钱锋1,何翠1,吴成立2
(1 国网浙江东阳市供电有限公司,浙江 东阳 322100;2 国网浙江安吉县供电有限公司,浙江 安吉 313300)
 
    摘 要:介绍了几种电力系统中产生直流分量的因素,设计了励磁涌流产生模型与叠加直流分量的仿真模型,分析了直流分量对电流互感器(TA)暂态传变特性的影响,并通过空载合闸投入变压器同时流入直流分量的仿真,研究TA传变异常对励磁涌流判据的影响。研究结果表明,直流分量将改变TA 传变特性,二次侧电流波形发生畸变,对励磁涌流闭锁二次谐波制动、间断角等判据产生影响,易引起变压器差动?;の蠖?。
    关键词:电流互感器;励磁涌流;直流分量;暂态饱和;差动?;?/div>
    中图分类号:TM77     文献标识码:A     文章编号:1007-3175(2018)12-0021-06
 
Simulation and Analysis on Transformer Differential Protection Affected by Direct Current Component
 
SHAO Mei-cai1, QIAN Feng1, HE Cui1, WU Cheng-li2
(1 State Grid Zhejiang Dongyang Power Supply Co., Ltd, Dongyang 322100, China;
2 State Grid Zhejiang Anji Power Supply Co., Ltd, Anji 313300, China)
 
    Abstract: Introduction was made to several kinds of factors producing the direct current component in power system. This paper designed the model producing excitation surge current and the simulated model of superposition direct current component, and analyzed the impacts of transient state transmission transformer characteristic on current transformers.Via the simulation of the influx direct current component when no-load closing input the transformer, this paper studied on the impacts of current transformers transmission transformer abnormity on the criterion of excitation surge current. The research results show that the direct current component changes the characteristics of current transformers transmission transformer and the secondary side current waveforms are distorted, which will have impacts on the second harmonic brake and discontinuous angle criterion of excitation surge current shutting, to give rise to the transformer differential protection misoperation.
    Key words: current transformer; excitation surge current; direct current component; transient saturation; differential protection
 
参考文献
[1] 韩笑. 电力系统继电?;M]. 北京:机械工业出版社,2011.
[2] 公茂法,侯林源,司丹淼,等. 基于小波模极大值理论的励磁涌流新判据研究[J]. 电测与仪表,2016,53(17):29-33.
[3] 张晓,张建文,潘磊落. 基于小波变换的变压器励磁涌流和故障电流识别研究[J]. 电测与仪表,2012,49(10):73-77.
[4] 凌光,苏斌. 一种基于差流波形特征的励磁涌流识别方法[J]. 电力系统?;び肟刂?,2015,43(6):19-24.
[5] 韩笑,洪晨,朱凯,等. 基于差动电流斜率标准差的变压器励磁涌流鉴别方法[J]. 电网与清洁能源,2015,31(9):72-77.
[6] 占金涛,蒋根华. 变压器空载冲击试验时?;の蠖蚍治鯷J]. 浙江电力,2007,26(2):38-41.
[7] 傅伟,赵莉华,梁勇,等. 多台变压器空载合闸励磁涌流及其抑制方案的研究[J]. 电力系统?;び肟刂?,2015,43(1):28-33.
[8] 孙向飞,周建萍,夏聆峰,等. 和应涌流导致差动?;の蠖J郊霸蜓芯縖J]. 昆明理工大学学报(自然科学版),2015(2):73-79.
[9] 翁文婷. 减小非周期分量影响的电气量计算方法研究[D]. 北京:华北电力大学,2015.
[10] 李君明,臧状,徐建源,等. 两起500 kV断路器重合失败分析[J]. 东北电力技术,2013,34(5):14-17.
[11] 周沛洪,戴敏,娄颖,等.1 000 kV交流断路器开断电流的直流分量时间常数和零偏现象[J]. 高电压技术,2009,35(4):722-730.
[12] 张孔林,廖福旺,李小洪,等. 断路器投切高补偿度500 kV空载线路的风险与对策[J]. 电力与电工,2010,30(4):5-8.
[13] 郑涛,陈佩璐,刘连光,等. 计及直流偏磁的电流互感器传变特性对差动?;さ挠跋靃J]. 电力系统自动化,2012,36(20):89-93.
[14] 任先文,徐宏雷,孙楷淇,等. 非周期分量对电流互感器饱和特性的影响的仿真[J]. 电力系统?;び肟刂?,2009,37(5):6-9.
[15] 李胜芳,刘钢,赵福平,等. 非周期分量下电流互感器的相位特性研究[J]. 电测与仪表,2012,49(1):8-12.
[16] 王振浩,王学斌,李国庆,等. 计及直流偏磁的?;び玫缌骰ジ衅鞣抡嬗胧笛榉治鯷J]. 电力系统?;び肟刂?,2015,43(13):15-22.