A Remote Phase Change System for Low-Voltage Power Distribution Area

Aiming at solving the problem of three-phase imbalance in three-phase four-wire low-voltage distribution network, a remote phase change system based on bus ZigBee network for low-voltage power distribution area has been designed. The system consists of a master control terminal and multiple intelligent phase change switches and the bus ZigBee communication network is constructed with ARM microprocessor and CC2630 as core: The master control terminal implements the download of the phase change command and the upload of the load status by the ZigBee coordinator technology; Intelligent phase change switch can swap phase sequence within 20 ms without power interruption by zero-cross switching technology based on permanent magnet relay. Compared with traditional compensation and other methods, this design provides a fast and safe way to controls three-phase balance from the load management and has better application prospects. Experimental tests showed that the system could run well and meet the power system requirements.