AD7865在继电保护装置中的应用

对继电保护装置中模数转换电路进行了探讨,提出了以AD7856芯片为功能核心,DSP芯片TMS320VC33作为控制的具体硬件实现电路和软件设计流程。试验表明该电路满足设计要求,保护电流、电压测量精度达到3%,测量电流精度达到0.2%。

Application of AD7865 in Relay Protection

A circuit that changes analog signals into digital signals in relay Protection have been discussed. A real circuit that uses chip AD7865 as a functional core and chip TMS320VC33 as a controlling core have been brought out,the flow of designing software is also been mentioned at the same time. Its effect has been proved by experimentation. The inaccuracy of the current and voltage used for protection is less than 3% and the current used for measure is less than 0.2%.