Treatment device and treatment method for low voltage caused by three-phase unbalance in distribution network terminal

Abstract

The invention discloses a device and method for treating a condition that the three-phase imbalance of a distribution network terminal causes a low voltage, and belongs to the technical field of power systems. The device has the structure that a voltage and current collection part (1) which is used for collecting the voltage and current values of each home-entry phase is connected with a home-entry terminal; the output end of the voltage and current collection part (1) is connected with a voltage and current comparison part (2); the output end of the voltage and current comparison part (2) is connected with a control switching part (3); and the control switching part (3) is connected with a load. According to the invention, the device effectively solves a problem that the three-phase imbalance of the distribution network terminal causes the low voltage, does not refer to the reconstruction and reforming of a power grid, is low in cost, achieves the real-time monitoring of the power grid, can adjust the load in real time according to the conditions, achieves the no-delay processing, and guarantees the stable operation of a load which cannot be switched off.

Description

technical field [0001] The invention discloses a control device and a control method for low voltage caused by three-phase unbalance in a distribution network terminal, belonging to the technical field of power systems. Background technique [0002] With economic development and social progress, some technical problems in the distribution network, especially the problem of low voltage caused by the unbalanced three-phase load, have become more prominent. Technical problems that need to be solved urgently. [0003] At present, there are mainly the following methods to solve the three-phase imbalance in China: one is to upgrade the line, disperse the asymmetric load, and supply the asymmetric load in the power grid in a distributed manner, that is, to reconstruct the circuit according to the nature of the load, It can avoid serious unbalanced power grid caused by centralized connection of too many unbalanced loads. The process needs to collect relevant information, such as: t...

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Problems solved by technology

[0005] In order to solve the above technical problems, the present invention provides a treatment device and treatment method for low voltage caused by three-phase unbalance in distribution network terminals. The present invention effectively solves the problem of low voltage caused by three-phase unbalance in distribution network terminals. , it does not involve reconstruction and transformation of the power grid, and the cost is low. Real-time monitoring of the power grid can be realized, and the load can be adjusted in real time according to the situation. It can be processed without delay and ensures the stable operation of uninterruptible loads

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