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针对当前煤矿井下选择性漏电保护装置的不足,基于零序功率选线方法,设计了以DSP处理器TMS320F2812为核心控制器的选择性漏电保护装置。并采用高精度三相电能计量芯片ATT7022E对零序电压及零序电流信号进行采集。结果表明:采用零序功率法进行故障判断,具有较好的可靠性和适用性。
Aiming at the shortage of selective leakage protection device in coal mine, a selective leakage protection device based on DSP processor TMS320F2812 is designed based on zero-sequence power line selection method. And the use of high-precision three-phase energy measurement chip ATT7022E zero sequence voltage and zero sequence current signal acquisition. The results show that using zero-sequence power method to judge faults has good reliability and applicability.