Power load balancing system for low voltage power distribution network

Abstract

The invention discloses a power load balancing system for a low voltage power distribution network. The system comprises power load balancing subsystems and a control main station. The power load balancing subsystems and the control main station are in communication connection. Each power load balancing subsystem comprises phase commutation devices and a control master station. The control masterstation comprises a first transmitting unit and a first receiving unit. The first transmitting unit and a second transmitting unit are in bidirectional connection with an analysis unit. The first receiving unit and a second receiving unit are connected with the analysis unit. The second receiving unit is connected with the second transmitting unit. The analysis unit is connected with a regional signal station through utilization of a network cable. A main branch time synchronizer is connected with the first transmitting unit and the second transmitting unit. The first transmitting unit and thefirst receiving unit are connected with the control main station through utilization of a 4G network. The second transmitting unit and the second receiving unit are connected with the control masterstation in an adjacent power load balancing subsystem through utilization of the 4G network. The phase commutation devices are set in a wireless signal range established by the regional signal stationand are in network connection with the analysis unit through utilization of wireless signals.

Description

technical field [0001] The invention relates to the field of low-voltage electric power, in particular to an electric load balancing system for a low-voltage distribution network. Background technique [0002] As we all know, the load of the distribution transformer of the low-voltage distribution network is generally composed of a mixture of three-phase load and single-phase load. Power distribution system, and the load size is different and the power consumption time is different. Therefore, the current imbalance between the three phases in the low-voltage distribution network exists objectively, and this power consumption imbalance is irregular and cannot be predicted in advance. It is one of the main problems that has been perplexing the power supply unit. The three-phase current load of the low-voltage distribution network is unbalanced, and many faults are caused accordingly, such as the single-phase load of the transformer is too large during the peak period of power...

AI Technical Summary

Problems solved by technology

In the three-phase four-wire power supply system, the distribution of three-phase loads is uneven, and the use of loads is asynchronous and random, which causes the distribution transformer to be in an unbalanced operation state of three-phase loads all the time.

This not only increases the line loss and distribution transformer loss, but also causes the unbalance of the three-phase voltage of the line, and the unbalanced operation of the three-phase load has a great impact on the low-voltage distribution network, such as having a serious impact on the quality of power and power supply. At the same time, it will also accelerate the aging of distribution transformer facilities, reduce the output of distribution transformers, etc.

[0003] Patent No. CN201510229756.8, a power load balancing system for low-voltage distribution network, discloses an extremely effective power system that can adjust power load balancing. This system solves the uneven distribution of three-phase loads in the power supply system However, in the process of use, it was found that during the connection process of the main line and the branch line, the current in the main line and the current in the branch line will generate a magnetic field under certain conditions, thus affecting the control station and the control master station. The communication between them makes the whole system unable to work normally, which brings great inconvenience to the power system

Images