摘要
提出并论述了共铁芯式主调合一的电炉变压器中性点端子经简单改接可实现新型中性点横差保护。当共铁芯式主调合一的电炉变压器发生高压绕组匝间短路、同相2个分支绕组之间短路、不同相之间的相间短路、单相接地短路以及中低压绕组匝间短路和相间短路时,中性点横差保护都能快速动作跳开高压侧断路器。该保护的优点是:一种保护能保护多种类型的短路故障且动作灵敏度高,保护匝间短路的灵敏度远高于纵差保护,且简单可靠。
New neutral transverse differential protection can be achieved if the neutral of the furnace transformer with one core is wired simply.New neutral transverse differential protection can act quickly and cut off the breaker of high-voltage side when interturn short circuit of high-voltage winding,winding short circuit of two branches between the same phase,interphase short circuit of different phases,single-phase earth fault,interturn short circuit and interphase short circuit of low-voltage winding occur in furnace transformer with one core.The advantages of new neutral transverse differential protection are that it can protect multiple types of fault and it has high sensitivity,the protection sensitivity of interturn short circuit is much higher than differential protection,and it is simple and reliable.
出处
《电力系统自动化》
EI
CSCD
北大核心
2013年第7期99-101,共3页
Automation of Electric Power Systems
关键词
电炉变压器
变压器保护
横差保护
共铁芯式变压器
furnace transformer
transformer protection
transverse differential protection
transformer with one core
