基于双CPU矿井漏电检测系统的研究与实现

Research on measurement system of electricity leakage based on double CPU

针对当前矿井漏电检测系统中保护动作速度慢、漏电检测困难的情况,依据零序电流有功分量的原理,设计了一种采用TMS320LF2407DSP和SPCE061A单片机的矿井漏电检测系统。详细阐述了其工作原理、硬件组成及软件设计方案。该系统通过零序电压和零序电流采样和A/D转换后,利用TMS320LF2407快速运算能力进行数据处理,得到零序电压、电流有效值和零序有功功率;CPLD实现对零序有功功率与给定功率进行比较以决定漏电保护电路的是否启动,并实现语音报警和与上位机串行通讯的功能。该系统稳定、可靠,具有运算速度快、实时性强等特点。

Base on the principle of active component of zero-sequence current, a new mine current leakage measurement system based on TMS320LF2407DSP and MCU SPCE061A is designed to resolve the slow response in protection,the difficulty in current leakage detection, and the other problems with current mine current leakage measurement systems. Its working principle, hardware constitution, and design blue print of software are expatiated in details. By taking advantage of the high speed operation capability of TMS320LF2407 to perform data processing, this system can obtain zero-sequence vohage and zero-sequence current through the sample to zero-sequence voltage and zero-sequence current and A/D conversion. CPLD is used to compare zero-sequence active component power with the given power to determine whether drive current leakage measurement circuit, and to fulfill voice alert and the serial communication with computer. This system is more stable and reliable, and futures high operation speed and better real time response.