Transformer area electric energy quality optimization device based on area wireless communication

Abstract

The invention discloses a transformer area electric energy quality optimization device based on area wireless communication. The transformer area electric energy quality optimization device comprisesan SVG module, a phase-change controller and a phase-change switch device. According to the invention, an MUC in the SVG module is used as a master control core, the SVG unit communicates with the phase-change controller through RS485, three-phase unbalanced current is adjusted in a unified and coordinated manner, unbalanced coarse adjustment is carried out through the phase-change switch, fine adjustment and reactive compensation are carried out through the SVG, the respective advantages of the two adjustment modes are considered, and the equipment cost is reduced to the maximum extent. 2.4 GHz wireless communication is sampled between the phase-change controller and the phase-change switch device, load data of the phase-change switch device is uploaded to the phase-change controller, thecontroller issues a phase-change command to the corresponding phase-change switch device according to the load imbalance condition, and the switch adjusts the load according to the received command.The problem of low-voltage power grid electric energy quality is solved, the power supply reliability is improved, the power distribution network loss is reduced, the field inspection and load adjustment workload of the operation and maintenance personnel is reduced, and the working efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of three-phase load unbalance adjustment, and in particular relates to an area power quality optimization device based on area wireless communication. Background technique [0002] For the three-phase power supply system in the distribution network area, the three-phase current imbalance is measured by the three-phase current unbalance degree. Three-phase current unbalance is the degree of three-phase current unbalance, which is usually represented by the symbol β. The calculation formula is: [0003] [0004] In the formula: Imax and Imin are the maximum value and minimum value of the three-phase current respectively, and the unit is A. [0005] Unbalanced three-phase loads can reduce the power supply efficiency of lines and distribution transformers, or cause excessive overloading of heavy-loaded phases, which may cause a certain phase conductor to burn out, a switch to burn out, or even a single-phas...

AI Technical Summary

Problems solved by technology

[0005] Unbalanced three-phase loads can reduce the power supply efficiency of lines and distribution transformers, or cause excessive overloading of heavy-loaded phases, which may cause a certain phase conductor to burn out, a switch to burn out, or even a single-phase burnout of the distribution transformer, etc. Serious consequences

[0006] The three-phase load is seriously unbalanced, the neutral point potential will shift, and the line voltage drop and power loss will greatly increase

[0043] It can only be adjusted roughly, but it is difficult to achieve precise adjustment;

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