矿用变压器继电保护装置的硬件改造及动态试验研究

Hardware Modification and Dynamic Test Research of Mining Transformer Relay Protection Device

为解决传统变压器继电保护装置容易受到电磁干扰,导致其内部存在较为明显的不平衡电流,从而影响继电保护装置误动作和延迟动作的问题,在对变压器继电保护装置硬件改造总体设计说明的基础上,重点完成了信号采集转换电路、输出/输入电路以及抗干扰设计。基于MATLAB软件对改造后保护装置的动态性能进行了试验研究,表明所设计的保护装置能可靠、稳定地实现对变压器的保护。

In order to solve the problem that the traditional transformer relay protection device is susceptible to electromagnetic interference,which leads to more obvious unbalanced currents inside it and thus affects the relay protection device’s misoperation and delayed operation,the signal acquisition and conversion circuit,output/input circuit and anti-interference design were completed on the basis of the overall design description of the transformer relay protection device hardware modification.The dynamic performance of the modified protection device was studied experimentally based on MATLAB software,and satisfactory results were obtained,verifying that the designed protection device can reliably and stably realize the protection of transformers.