Research On Intelligent Protector For Power Distribution Line

In the power system,the fault state of the distribution line of the whole system is huge,in the higher proportion of the total failure of single-phase grounding fault in this paper,the design of electric current protection and distance protection strategy,and designed a power distribution line intelligent protector.The protector DSP28335 as the control core,the current sensor based on Rogowski coil and voltage,real-time acquisition of distribution line resistance sensor capacitor divider based on current signal,after filtering by DSP after ADC conversion acquisition,output and fault according to the current voltage and current signal detection and the corresponding action signal the.In addition,the system's display,alarm and power circuit are designed in detail.This paper finally made intelligent protector of prototype,and under the condition of laboratory simulation of distribution lines on the current signal was tested.The test results show that the current signal acquisition system accurately,to prove the feasibility of the design theory.