智能三相电网缺相保护器是一种通过对三相电网内部多种电量的检测与分析，找出更加合理的负载缺相保护依据。利用Ram高速数据处理功能统计算法，直接计算各交流电参量，省略了小信号整流电路。设计的电网计量算法，可对待测电网的不平衡度、缺相状况进行实时监测。采用LPC2103作为其控制核心，电路含有抗干扰和功率放大输出功能，实现了小信号输出控制大功率负载。% Intelligent lacking phase protector is to find the reason of lacking phase based on detection and analysis the power of the three-phase grid. This paper used the high-speed data processing capabilities and statistical algorithms direct calculation of each AC parameters, omitting the small signal rectifier circuit. Through the power measurement algorithm, imbalance, lacking phase state real-time monitoring system can be measured by the power grid. Using LPC2103 as the control core, with a triode amplifying output circuit to improve the output power of the system, small signal output control requirements for design of high power load is realized.
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