Three-phase unbalanced load compensation device and method

The present invention provides a three-phase unbalanced load compensating means, which comprises a sampling module, a digital input module, a digital output module, the man-machine interface module, a communication module, a storage module, a complex programmable logic device, the sampling module the digital input module, the digital output module, the man-machine interface module, a memory module, a complex programmable logic devices are connected with the communication module, the sampling module of the input voltage signal or current signal is sampled and processed, the digital input output module for input and output switch, the human interface module for user input and output information setting parameters, the data stored in the storage module, the complex programmable logic device on the communication module port for expansion. Further there is provided a method of compensating an unbalanced load, simple three-phase unbalanced load compensating device structure of the present invention is versatile.