基于双CPU结构的变压器微机保护装置的研究  

Double CPU based Digital Protection Device for Power Transformer

作　　者：尹军[1] 同向前[1] 孙泽廷 李征[1] 

机构地区：[1]西安理工大学自动化与信息工程学院,陕西西安710048 [2]天津益诚电力设备有限公司,天津300381

出　　处：《陕西电力》2009年第8期34-37,共4页Shanxi Electric Power

摘　　要：配电变压器的微机保护是配电系统安全可靠运行的重要保证。针对配电变压器保护的复杂特点,提出了DSP与MCU复合的双CPU结构,DSP主要负责保护信号检测与保护运算,MCU主要负责测量信号检测与人机接口。改进了基于傅立叶变换的保护算法,采用增量式递推算法提高了检测的实时性,降低了算法的运算量。利用继电保护测试装置和模拟断路器进行了功能测试,结果表明该装置保护逻辑正确、动作灵敏可靠。The digital protection of power transformer is very important for the safe and reliable operation of power system. In the light of the complexity of power transformer protection, a protection device with double CPU of DSP and MCU is presented. The DSP completes protective signal sampling ＆ protection calculation, and the MCU performs the electric measurement ＆ man-machine iuterfacing. An improved protection algorithm based on recursive incremental Fourier transformation is applied to enhance real-time performance and reduce computational complexity. The functions of the device are tested with a standard relaying testing device and simulated circuit breaker, the results indicate that the relaying logic is correct and the protection operation is sensitive ＆ reliable.

关 键 词：变压器 微机保护 双CPU 傅立叶算法 

分 类 号：TM774[电气工程—电力系统及自动化]