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Dynamic voltage compensation apparatus and method

A dynamic voltage compensation and DC voltage technology, applied in the direction of AC network voltage adjustment, etc., can solve the problems of increasing the cost of use and reducing the performance of compensation response, and achieve the effect of low cost, ensuring no change, and protecting the load

Active Publication Date: 2014-02-26
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the UPS must use a transformer, the cost of using the UPS is increased, and the nonlinear characteristics of the transformer will also lead to a decrease in the compensation response performance of the UPS

Method used

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  • Dynamic voltage compensation apparatus and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] This embodiment provides a dynamic voltage compensation device, see Figure 1a , The device provided in this embodiment specifically includes:

[0036] Controller (1), H-bridge inverter unit (2), AC voltage transformer (3), bypass thyristor (4), filter inductor (5), filter capacitor (6), photovoltaic panel PV (7).

[0037] Wherein, the controller (1) is provided with: an H-bridge inverter unit control terminal, a bypass thyristor control terminal, and an AC voltage input terminal; the H-bridge inverter unit (2) is provided with: a DC input terminal, 2 AC output terminals and input control terminals; the bypass thyristor (4) is provided with: input control terminals, input terminals, and output terminals.

[0038] The core of the controller is a digital signal processor, a single-chip microcomputer or a computer. The H-bridge inverter unit control terminal of the controller (1) is connected to the input control terminal of the H-bridge inverter unit (2); the bypass thyristor co...

Embodiment 2

[0051] This embodiment provides a dynamic voltage compensation device, see Figure 2a , The device provided in this embodiment includes:

[0052] Controller (1), H-bridge inverter unit (2), AC voltage transformer (3), bypass thyristor (4), filter inductor (5), filter capacitor (6), photovoltaic panel PV (7), DC voltage sensor (8), DC boost unit (9).

[0053] Wherein, the controller (1) is provided with: an H-bridge inverter unit control terminal, a bypass thyristor control terminal, an AC voltage input terminal, a DC boost control terminal, and a DC voltage input terminal;

[0054] The H-bridge inverter unit (2) is provided with: a DC input terminal, 2 AC output terminals, and an input control terminal; the bypass thyristor (4) is provided with: an input control terminal, an input terminal, an output The DC boost unit (9) is provided with an input terminal, an output terminal, and an input control terminal.

[0055] The H-bridge inverter unit control terminal of the controller (1) is...

Embodiment 3

[0075] This embodiment provides a dynamic voltage compensation device, see image 3 , The device provided in this embodiment includes:

[0076] Controller (1), H-bridge inverter unit (2), AC voltage transformer (3), bypass thyristor (4), filter inductor (5), filter capacitor (6), photovoltaic panel PV (7), DC boost unit (9), DC voltage sensor (8), DC current sensor (10), grid-connected inverter (11).

[0077] Wherein, the controller (1) is provided with: H-bridge inverter unit control terminal, bypass thyristor control terminal, AC voltage input terminal, DC boost control terminal, DC voltage input terminal, DC current input terminal, grid-connected Inverter control terminal; the H-bridge inverter unit (2) is provided with: a DC input terminal, two AC output terminals, and an input control terminal; the bypass thyristor (4) is provided with: an input control terminal , Input terminal, output terminal, the DC boost unit (9) is provided with: input terminal, output terminal, input c...

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PUM

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Abstract

The invention, which belongs to the technical field of the electric energy quality, discloses a dynamic voltage compensation apparatus and method. The apparatus comprises a controller (1), an H bridge inverter unit (2), an alternating-current voltage transformer (3), a bypass thyristor (4), a filter inducer (5), a filter capacitor (6), and a photovoltaic cell panel PV (7). According to the disclosed dynamic voltage compensation apparatus, the solar energy is fully utilized; and because no series transformer is used, the responding performance is better, the size is smaller and the cost is lower.

Description

Technical field [0001] The invention relates to the technical field of power quality, in particular to a dynamic voltage compensation device and method. Background technique [0002] In the field of power quality, voltage sag is the main cause of power quality problems. Voltage dip (also known as voltage dip, voltage dip or voltage sag), according to the definition of the Institute of Electrical and Electronics Engineers IEEE, refers to the reduction of the root mean square value of the voltage to 0.1---0.9 times the rated voltage under power frequency conditions A short-term voltage fluctuation phenomenon with a duration of 0.5 cycles (the frequency of my country's power grid is 50HZ, and a cycle is 20 milliseconds) to 1 minute. Voltage sinking will not only cause voltage quality problems in the power system, but also endanger the safe operation of electrical equipment. Power system failure, large-scale motor startup, branch circuit short circuit, etc. will cause voltage sag. A...

Claims

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Application Information

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IPC IPC(8): H02J3/12
Inventor 钟清郑晓光余南华梁晓兵郭小龙宋旭东黄松波卢远孙闻刘东李国杰冯琳
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID