Abstract
In the low-voltage (LV) distribution network, a three-phase unbalance problem often exists. It does not only increase line loss but also threaten the safety of the distribution network. Therefore, the author designs a residential load transfer device for a LV distribution network that can deal with a three-phase unbalance problem by changing the connecting phase of the load. It consists of three parts: user controller for phase swapping, central controller for signal processing and monitoring platform for strategy calculation. This design was based on message queuing telemetry transport (MQTT) communication protocol, and Long Range and 4th Generation mobile telecommunications (LoRa + 4G) communication mode is used to realize the wireless connection between equipment and monitoring platform, and a control scheme is proposed. The improved multi-population genetic algorithm (IMPGA) with multi-objective is used to find the optimal swapping strategy, which is implemented on the monitoring platform. Then the phase swapping is realized by remote control, and the function of reducing three-phase unbalance is realized. The practical experimental result shows that the method can help to reduce the three-phase unbalance rate by changing the connection phase of the load, and the simulation results verify the effectiveness of the algorithm in the phase-swapping strategy.
Highlights
Nowadays, with the rapid development of electronics industry and the Internet, the demand for power is constantly increasing
The improved multi-population genetic algorithm (IMPGA) with multi-objective is used to find the optimal swapping strategy, which is implemented on the monitoring platform
The main contributions of this article are: (1) Different from the above research, this paper considers the problem of the number of switch performing phase swapping, which designed a multi-objective improved multi-group genetic algorithm for phase-swapping strategy calculation, it can calculate strategy to reduce the unbalance and switch times quickly and effectively, this extends the life of the switch and makes the power supply more reliable
Summary
With the rapid development of electronics industry and the Internet, the demand for power is constantly increasing. In order to realize the automatic load adjustment function, an algorithm needs to be designed to calculate the strategy of effectively reducing the three-phase unbalance rate. (1) Different from the above research, this paper considers the problem of the number of switch performing phase swapping, which designed a multi-objective improved multi-group genetic algorithm for phase-swapping strategy calculation, it can calculate strategy to reduce the unbalance and switch times quickly and effectively, this extends the life of the switch and makes the power supply more reliable. (2) Because the cost of STS is too high, this paper designs the driving process of the magnetic latching relay, which is used as a phase-swapping switch It reduces the cost of the equipment and can realize the functions of zero-voltage turn-on and zero-current turn-off, which reduce the impact of inrush current and arc on the user. Several pieces of research about phase-swapping strategy algorithms and phase-swapping switches
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
