【作者】 王长春；

【导师】 郑涛； 郭春志；

【作者基本信息】 华北电力大学（北京） ， 电气工程， 2009， 硕士

【摘要】 研究并解决500kV变压器保护在实际工程中存在的问题,具有重要的理论和现实意义。本文首先指出了500kV变压器保护配置存在的问题,提出了基于不同动作逻辑而非闭锁逻辑的双重化主保护配置方案,通过改变主保护配置方案提高保护灵敏性和速动性的方法。计算了500kV变压器热稳定极限时间,探讨后备保护与变压器热稳定性能间的配合问题。结合工程实践,提出一种有效的试验方案,能够对变压器二次电流回路正确性进行全面的检验。分析了自耦变压器公共绕组过负荷的原因,提出解决方法。最后,对变压器保护与母线保护的各种接口配合方案做对比研究,提出最优的解决方案。更多还原

【Abstract】 It is important necessary and practical significant to research and resolve 500kV transformer protection in practical engineering problems.The paper first points out the problems of the 500kV transformer protection configuration.It makes a program of double main protection configuration,which is based on the operation logic rather than on the lock logic,a method for promoting the sensitivity and the speed by changing the main protection configuration.It calculated the time limit of the 500kV transformer thermal stability and explored the question that between the back-up protection and thermal stability the transformer.With the combination of engineering practice,an effective pilot program which is used for comprehensively testing the current secondary circuit of transformer is suggested in the paper.It Analyses the reason for the autotransformer public winding overload and make a solution.Finally,the paper compares to study the programs for the interface of transformer protection and busbar protection,and select the optimal solution.更多还原