Unbalanced low voltage control device and method

Abstract

The invention discloses an unbalanced low voltage control device, which comprises a transmission line, a measurement and control terminal, a signal acquisition module, a communication module, a man-machine interface, a data storage module, an unbalanced compensation module and a voltage regulating module. The transmission line comprises a detection line, a compensation line and a voltage regulating line which are connected sequentially by linkage switches. The measurement and control terminal is connected with the detection line through the signal acquisition module which acquires voltage andcurrent signals. The measurement and control terminal is connected with the voltage regulating module arranged on the voltage regulating line through a communication interface. The unbalance compensation module is arranged between the measurement and control terminal and the voltage regulating module and is connected with the compensation line. Due to plug-and-pull connection among the unbalancedcompensation module, the voltage regulating module and the measurement and control terminal, fast connection is realized, the modules operate parallelly, and equipment capacity expansion is realized in a simple environment; and multiple zero line compensation capacity is achieved, zero line current is eliminated, line loss is reduced, and functions of three-phase unbalance control and low voltagecontrol can be realized.

Description

Technical field: [0001] The invention relates to a power supply line balance control device, in particular to an unbalanced low voltage control device. Background technique: [0002] With the improvement of living standards and the increase of electricity load, the voltage of some lines is low and the line load is seriously unbalanced. It will cause the transformer to be overloaded and burned, which will have a certain impact on power supply enterprises and people's lives. The single low-voltage control cannot make the line load balance, and the three-phase load fluctuates greatly, and the adaptability to the unbalanced occasion is poor. The adjustment and compensation device is generally installed on the side of the distribution transformer, which cannot solve the problem of line loss and low voltage caused by unbalanced branch line current. In addition, its unbalanced regulation depends on the power factor of the low-voltage distribution network. At present, the low-vol...

AI Technical Summary

Problems solved by technology

At present, the low-voltage system has less inductive reactive power and higher power factor, so the unbalance adjustment ability of the adjustment and compensation device is general, and it is seldom used at present.

The unbalanced treatment device cannot increase the line voltage, and the cost of line reconstruction is too high

Therefore, the use of the existing unbalanced low-voltage control method is not satisfactory, and its innovation and improvement are imperative

Images