The utility model belongs to the technical field of the little power grid operation of electric power system, a little little signal stabilization analysis of electric wire netting and parameter coordination system of adjusting is disclosed, be provided with the display screen, the display screen is located the casing upper surface, totally two signal reception lines, and two signalling lines, thesignal reception line all is located the casing upper surface with the signalling line. Circuit board and lithium cell all are located inside the casing, the display screen passes through the bolt fastening at casing upper surface, low pass filter electric connection in signal reception line to through screw fixation in shells inner wall, overload protective device passes through screw fixation in casing bottom, and electric connection in circuit board, dc -to -ac converter electric connection in signalling line. The utility model discloses that has avoided that the parameter adjusts one by one is loaded down with trivial details, has shortened operating time greatly, and overload protective device avoids the too high circuit board that burns out of operating voltage, and low pass filtereliminates signal reception line received high order current harmonic, and the design of dc -to -ac converter makes output voltage more stable.