摘要
为研究特高压有载调压变压器差动保护特性,从变压器差动保护基本特性、差流不平衡特性等方面进行了研究,指出常规调压变压器保护在特高压变压器有载调压过程中的动作风险。通过对差流不平衡特性影响因素深入分析,给出调压变压器差动保护额定电流选取建议。通过仿真试验得到了不同档位下差流分布情况,提出了有载调压过程中调压变压器差动保护整定策略,并通过仿真试验得到验证。
In order to investigate the differential protection characteristics for on-load-tap-changer transformers of UHV,the basic performances of differential transformer protection and its unbalanced differential current were studied,by which it is found that the conventional protection of on-load-tap-changer transformers may have a potential risk during the transformer tap adjustment.Through the further analysis of the influencing factors on the characteristics of unbalanced differential current,suggestions about the selection of ratedcurrent of differential protection for on-load-tap-changer transformers were proposed.In addition,the differential current distribution during the transformer tap adjustment is obtained by the simulation and the setting strategy is accordingly provided,which is also validated by the simulation.
出处
《中国电力》
CSCD
北大核心
2014年第9期112-117,148,共7页
Electric Power
关键词
调压变压器
差动保护
额定电流
整定策略
特高压
仿真试验
档位
差流
voltage-regulating transformer
differential protection
rated current
setting strategy
UHV
simulation test
gear
differential current
