An Active Power Quality Comprehensive Adjustment Device and Its Detection Algorithm

Abstract

The invention relates to an active power quality comprehensive adjusting device and a detection algorithm thereof. The active power quality comprehensive adjusting device comprises a cabinet body, a power unit, a protection plate, a circuit breaker unit, a secondary mounting plate unit, a direct-current capacitor unit, a fan, an L1 electric reactor, an L2 electric reactor, a filter capacitor and a contactor. The secondary mounting plate unit is supported and fixed through a secondary mounting plate which is made of metal materials, a vent window is arranged on the top of the cabinet body, ventilation louvers are arranged on the lower portion of the cabinet body, and inlet wire connecting devices are arranged on the upper portion and the lower portion of the back face of the cabinet body. The active power quality comprehensive adjusting device has the advantages that under system control, one device can be used for realizing functions of an SVG or an APF respectively, and can also be used for realizing functions of the SVG and the APF at the same time, namely function requirements of the SVG or the APF are considered at the same time from the aspects of hardware and software. By means of the device, dilatation can be achieved easily, the modularized design is used, power density is high, size is small, and connection busbar length is reduced.

Description

technical field [0001] The invention belongs to the field of power quality control equipment, in particular to an active power quality comprehensive adjustment device and a detection algorithm thereof. Background technique [0002] With the improvement of the national economic strength and the rapid development of the electric power industry, high-power power electronic equipment is gradually widely used in the industry, and the reactive power and harmonic pollution caused by it are also becoming more and more serious. [0003] Nowadays, the high-power switching devices of various power electronic devices work in a nonlinear state, which not only reduces the power factor of the power grid system to a certain extent, but also injects a large amount of harmonic current into the power grid, forming a huge power public hazard , resulting in instability, insecurity and waste of the power grid, for this reason, reactive power and harmonic control has important practical significan...

AI Technical Summary

Problems solved by technology

[0006] (2) The existing technology cannot handle reactive power and harmonics simultaneously in the same device;

[0007] (3) The design of the traditional equipment structure is loose, the volume is large, the power consumption is large, and there are many non-ferrous metal consumables, which increase the production cost

[0008] (4) The equipment control system is susceptible to electromagnetic interference, which affects the stable operation of the equipment

[0009] (5) The equipment is easily affected by ambient temperature, humidity, salt spray and static electricity, causing equipment overheating, partial discharge and other failures

[0010] (6) The equipment structure design is complicated, the production efficiency is low, and the maintenance and replacement are inconvenient

[0011] (7) The filtering effect of linear or nonlinear loads with frequent changes in harmonic order is not very good;

However, the cabinet structure of the existing parallel active power filter is huge, its own power consumption is large, the range of harmonic filtering is small, and the response speed is slow, and it cannot solve various power quality problems at the same time. Low, only analog display and other disadvantages

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