Branch-line voltage regulation device with controller taking voltage as criterion and combination switch

Abstract

The invention discloses a branch-line voltage regulation device with a controller taking voltage as a criterion and a combination switch. The branch-line voltage regulation device comprises a core controller and the combination switch and is characterized in that the core controller carrying out analysis and calculation according to acquired three-phase alternating current voltage and parameters,and simultaneously sends out a control command to a fling-cut switch control module according to an analysis and calculation result to enable the corresponding combination switch to act to regulate the operation of a corresponding capacitor; when a reactive power supply outputs reactive power larger than a reactive load and losses in a network, the core controller controls to alleviate the operation of the capacitor; when the reactive power supply outputs the reactive power smaller than the reactive load and the losses in the network, the core controller controls to enhance the operation of the capacitor; and when the reactive power output by the reactive power supply is balanced with or basically balanced with the reactive load and the losses in the network, the core controller controls the capacitor to maintain the current state without changing. The invention realizes the automatic tracking of the change of input voltage and reasonable regulation on each branch-line voltage.

Description

Technical field: [0001] The invention relates to a branch line voltage regulating device, in particular to a branch line voltage regulating device with a voltage-based controller and a composite switch. Background technique: [0002] For power companies, loss reduction, energy saving and improvement of power quality are the goals that have been pursued. Due to the characteristics of long lines, large line losses, wide load distribution, and many branch lines in rural power grids, the power load varies greatly with day and night and seasons, especially in some remote areas, there are a certain number of long-distance branch lines whose power supply radius exceeds the national regulations , the terminal voltage is difficult to guarantee, the power factor cannot meet the requirements, and the line loss is serious. With the rapid development of my country's economy, the vast number of rural users have higher and higher requirements for power quality, and it is imminent to impro...

AI Technical Summary

Problems solved by technology

Since the voltage regulating transformer cannot change the balance state of reactive power demand, if the reactive power shortage is large, in order to maintain the voltage level, the on-load voltage regulating transformer operates, and the voltage rises temporarily, and all the reactive power shortage is transferred to the main network, thereby Make the main grid voltage drop gradually, which may lead to system voltage collapse in severe cases

However, if it is an off-load voltage regulating transformer, it needs to be powered off, which is inconvenient for practical application.

Images