Distribution transformer harmonic wave equalizing device

Abstract

The invention discloses a distribution transformer harmonic wave equalizing device, which comprises a hybrid active power filter, a three-phase supplying and compensating intelligent capacitor, an inverter current feedback device, an ARM control protection module and a data acquisition test terminal, and is characterized in that the hybrid active power filter is used for compensating harmonic wave pollutions in each harmonic wave elimination circuit; the three-phase supplying and compensating capacitor is used for carrying out compensation on reactive power in the circuit; the inverter current feedback device is applied to a distribution transformer output end so as to carry out treatment on active power imbalance; the ARM control protection module is used for protecting the whole device; and the data acquisition test terminal is used for acquiring electric energy quality data and transmitting the acquired electric energy quality data. The distribution transformer harmonic wave equalizing device adopts targeted comprehensive treatment in allusion to harmonic waves, reactive power and three-phase imbalance, effective management for the electric energy quality of a low-voltage distribution network can be achieved, the power supply quality is improved, the running safety of power supply equipment is ensured, occurrence of production accidents is avoided, the power supply efficiency is improved, the power grid loss is reduced, energy conservation, emission reduction, cost decreasing and benefit increasing are realized for the running economy of a power grid, the electric energy quality is improved, and the power grid runs safely.

Description

technical field [0001] The invention relates to the field of electrical circuits, in particular to a distribution transformer harmonic leveling device. Background technique [0002] Most of the low-voltage power grids are stepped down by 10 / 0.4kV transformers, and then supply power to users in a three-phase four-wire system. It is a power supply network that mixes three-phase production power and single-phase load power. When installing single-phase users, the power supply department should in principle tap the single-phase loads on the three phases A, B, and C in a balanced manner. However, in actual work and operation, due to the uncontrollable capacity increase and large Factors such as the access of power single-phase loads and the non-simultaneity of power consumption of single-phase loads have caused the imbalance of three-phase loads, not only the imbalance of useful power, harmonics, and reactive power. The situation on each phase is different. . With the continuou...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the existing technical problems, the present invention provides a distribution transformer harmonic leveling device, which can effectively solve the common problems of harmonics, reactive power and three-phase unbalance

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