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Active power balance device

A technology for balancing devices and source power, applied in harmonic reduction devices, reactive power adjustment/elimination/compensation, reactive power compensation, etc., can solve voltage and current waveform distortion, endanger power grid power supply, voltage drop or surge and other problems, to achieve the effect of preventing neutral line harmonic overcurrent, improving power supply reliability, and high power factor

Inactive Publication Date: 2019-06-04
袁辉
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Problems solved by technology

Many power loads in the grid have the characteristics of low power factor, nonlinearity, unbalance and impact. These characteristics seriously endanger the power supply of the grid, which can be manifested in: voltage drop or surge, various harmonic The wave content is large, the voltage waveform flickers, the voltage and current waveforms are distorted, etc., so there are power quality problems

Method used

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Embodiment Construction

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0016] see Figure 1-3 , in the embodiment of the present invention, an active power balance device includes a GP650 active power balance device 1, the rated input voltage of the GP650 active power balance device 1 is 400V, the rated input frequency is 50Hz±1Hz, the maximum capacity of a single machine is 35KVA, and the response Time ≤ 20ms, power loss ≤ 1.5KW, GP650 active power balance device 1 is equipped with two different terminal blocks, namely terminal ...

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Abstract

The invention discloses an active power balance device which comprises a GP650 active power balance device. The GP650 active power balance device is provided with two different terminal strips, a three-phase voltage is arranged on the GP650 active power balance device, and the two different terminal strips are electrically connected to the three-phase voltage through wires. In the aspect of compensating for inductive reactive power and capacitive reactive power, the active power balance device is effective and responsive. In the aspect of voltage boost, the device can track in real time and isactive and stable. In the aspect of balancing the three-phase active power, the device achieves real-time tracking and active equalization. In the aspects of protecting a power distribution transformer, the device can monitor a three-phase load in real time, the three-phase equalization output is achieved, single-phase overload is prevented, and the power supply reliability is improved. In the aspect of harmonic control, a three-phase harmonic current is tracked in real time, the active offset is achieved, the power quality can be improved, and the neutral harmonic overcurrent is prevented.

Description

technical field [0001] The invention relates to the technical field of three-phase output of distribution transformers, in particular to an active power balancing device. Background technique [0002] With the rapid development of modern power electronics technology, a large number of high-power and nonlinear loads are connected to the power grid, which seriously threatens the power supply quality of the power grid. In particular, the extensive use of nonlinear and impact loads such as electric arc furnaces, rolling mills, and rectifier bridges is the most important source of power quality deterioration, causing a series of serious effects. The ideal power supply requires a standard sinusoidal waveform with a frequency of 50 Hz and a stable voltage amplitude at the rated value. In the three-phase grid power supply system, the voltage and current amplitudes of the three phases A, B, and C are equal, and the phase difference is 120 degrees behind in turn. However, when vario...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/26H02J3/18H02J3/01
CPCY02E40/30Y02E40/40Y02E40/50
Inventor 袁辉
Owner 袁辉
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