Long -range harmonic monitoring devices of rural power grids

The utility model discloses a long -range harmonic monitoring devices of rural power grids, including supply input interface, commercial power output interface, voltage transformer, current transformer, microprocessor and wireless communication module, its characterized in that: voltage transformer's primary coil one end connects the live wire of supply input interface to hold through resistance R1, and the other end links to each other with the zero line end of supply input interface, and this voltage transformer's secondary coil meets microprocessor through the the first signal modulate circuit, current transformer's primary coil concatenates between the live wire end of supply input interface is held with the live wire of commercial power output interface, and this current transformer's secondary coil meets microprocessor through the 2nd signal conditioning circuit, output at microprocessor still is connected with the harmonic compensation circuit. Its effect is: standardized inside and outside circuit overall arrangement, the wiring is convenient, and the monitoring data can teletransmission, does not need professional field maintemance, can realize the harmonic compensation in the subrange, realizes that rural power grids electric power quality promotes.