Current monitor and electric power quality compensation system

An electric power quality compensation system, comprising:

• an external detection module configured to detect a real-time current of an external power network and output a first level detection current;
• a current monitor which comprises:
• an internal monitor module configured to output a measurement of current for characterizing a real-time electric power quality of the external power network based on a received detection current;
• and
• an isolation and transfer module comprising an input side and an output side electrically isolated from each other, wherein the input side is configured to be connected with the external detection module, the output side is configured to be connected with the internal monitor module, and the isolation and transfer module receives the first level detection current and outputs a second level detection current to the internal monitor module so as to reduce the impedance of the internal monitor module reflected to the external detection module;
• and
• a compensation module connected with the internal monitor module in the current monitor and configured to compensate the electric power quality of the external power network based on the measurement of current output from the internal monitor module.