摘要
现有的基于变压器模型的保护原理摆脱了励磁涌流的影响,但由于没有全面考虑各种因素而引起的误差可能会使保护误动。文章以双绕组单相变压器为对象讨论了各种误差因素对保护动作特性的影响,进而提出了基于变压器模型的新型保护原理和判据,并指出了参数整定的指导原则。通过对变压器的多种运行状态进行仿真计算验证了该保护原理和整定原则的正确性。
Although in existing transformer model based transformer protection principle the influence of magnetizing inrush current is cast off, but the errors caused by the factors which are not overall considered may make the protection maloperated. Taking the two-winding single phase transformer as the object of study, the influence of various factors causing the error on the action character of the protection was researched, then a novel transformer model based protective principle for transformers and its criteria were proposed, and the guiding principle for the parameter setting was pointed out. By means of the simulation of various operating conditions of transformer, the correctness of the proposed protective principle and its setting rules was verified.
出处
《电网技术》
EI
CSCD
北大核心
2005年第5期67-71,共5页
Power System Technology
关键词
电力变压器
保护原理
差动保护
励磁涌流
Computer simulation
Electric currents
Electric fault currents
Magnetization
Relay protection
Transformer windings
