文章摘要
倪传坤,于同伟,邓茂军,等.基于GOOSE网络的智能变电站变压器纵差保护方案[J].电力系统自动化. DOI: 10.7500/AEPS20180528008.
NI Chuankun,于同伟,邓茂军, et al.Transformer Longitudinal Differential Protection Based on GOOSE Network in Smart Substation[J].Automation of Electric Power Systems. DOI: 10.7500/AEPS20180528008.
基于GOOSE网络的智能变电站变压器纵差保护方案
Transformer Longitudinal Differential Protection Based on GOOSE Network in Smart Substation
DOI:10.7500/AEPS20180528008
关键词: 智能变电站  纵差保护  GOOSE网络  档位信息  平衡系数  灵敏度
KeyWords: smart substation  differential protection  GOOSE network  gear location information  balance coefficient  sensitivity
上网日期:2019-01-31
基金项目:国家电网公司科技项目(5222LK17001F);河南省科技研发 专项资助项目(184100510023)
作者单位E-mail
倪传坤 许继集团有限公司 xjtc_nichuankun@126.com 
于同伟 国网辽宁省电力有限公司电力科学研究院 xjgc_dengmaojun@126.com 
邓茂军 许继集团有限公司 xjtc_dengmaojun@126.com 
李宝伟 许继集团有限公司 xjtc_dengmaojun@126.com 
胡叶宾 许继集团有限公司 xjtc_dengmaojun@126.com 
李旭 许继集团有限公司 xjtc_dengmaojun@126.com 
摘要:
      变压器纵差保护启动电流需要躲过正常运行时的不平衡电流,而不平衡电流的主要来源是由变压器有载调压分接开关档位调节引起的。当有载调压分接开关档位调节范围大时,变压器纵差保护启动电流定值整定较高,影响了差动保护的灵敏度。提出通过智能变电站GOOSE网络获取变压器调压分接开关的档位信息,再根据调压分接开关的实际档位自动调整纵差保护的平衡系数,消除变压器正常运行时档位调节引起的不平衡电流。同时提出基于GOOSE网络的纵差保护整定方法,降低差动保护的启动电流和比率制动系数,并对纵差保护的动作特性进行了改进。试验结果表明,改进方案提高了变压器纵差保护的灵敏性及速动性。
Abstract:
      For transformer longitudinal differential protection, the starting current should avoid the influence of unbalance current which is caused by the regulation of switch gear for on-load tap changer during normal operation. When adjusting the wide range of switch gear, the sensitivity of differential protection would be impacted by high setting of starting current. This paper proposes that the gear position information could be obtained through the GOOSE network for smart substation, and then adjust the balance coefficient of the differential protection automatically based on its actual gear position to eliminate the unbalanced current caused by gear position adjustment during normal operation. Meanwhile, the tuning method of differential protection based on GOOSE network is proposed, which reduces the starting current and ratio restraint coefficient, also improves the operating characteristics of differential protection. The simulation results show that the improved scheme enhances the sensitivity and quickness of transformer differential protection.
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