A terminal voltage refinement voltage regulating device

Abstract

A terminal voltage refinement voltage regulating device includes a master control module, a voltage compensation module and a reactive power compensation module; the master control module is connectedwith the voltage compensation module and the reactive power compensation module, the boost and buck modes are switched by the boost switch KMA2. The device realizes refined multi-level adjustment ofbucking and boosting of a refined multi-level transformer, achieves a good voltage regulation effect, and achieves a low transformer cost. The voltage compensation module can be automatically disconnected from the system when voltage regulation is required. The device has the advantages of no extra loss, low power consumption, and high reliability of main control dispatch and switch switching, andcan directly and effectively solve the problem of low terminal voltage in a rural power network, ensure the normal power supply of residents, solve the problem that the voltage regulating mode of changing the main transformer load tap in a substation cannot ensure that all the lines have boosted voltage.

Description

technical field [0001] The invention relates to the technical field of low-voltage distribution networks, in particular to a fine voltage regulation device for terminal voltage. Background technique [0002] The weak foundation of the existing rural power grid, large power supply radius, long lines, seasonal power consumption and other factors cause the voltage at the end of the low-voltage line to be low, resulting in poor voltage quality at the client end and increased line loss. Measures must be taken to improve the voltage quality. [0003] At present, there are two commonly used methods for voltage regulation: one is to change the on-load tap of the main transformer of the substation to adjust the voltage, but the basis for adjustment can only be based on the busbar of the substation, and it cannot be guaranteed that the voltage of all lines will be increased, and frequently Adjusting the taps of the main transformer has a great impact on the safe operation of the main ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is to provide a terminal voltage fine voltage regulating device to solve the problem that the current voltage regulation method of changing the on-load tap of the main transformer of the substation cannot ensure that the voltage of all lines can be increased. At the same time, Solve the problem that the voltage regulation method using switched capacitors has limited application, small voltage regulation range, and unsatisfactory regulation effect on low voltage caused by too long power supply lines

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