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Super capacitor and accumulator hybrid energy-storing series type dynamic voltage restorer

A technology of dynamic voltage recovery and supercapacitor, which is applied to battery circuit devices, systems for storing electrical energy, and current collectors. It can solve problems such as difficulty and increased cost of refrigeration systems, and achieve low maintenance costs, reduced charge-discharge cycle times, and Effect of improving reliability and economy

Active Publication Date: 2009-01-07
WUHAN HIGH VOLTAGE RESEARCH INSTITUTE OF STATE GRID
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Problems solved by technology

The main disadvantage is that the refrigeration system increases the cost. In addition, its stability is also worthy of attention. It is very sensitive to changes in temperature, current density and magnetic field. Its magnetic field must be equal to or higher than 9T. It is also a challenge to maintain such a high magnetic field. a very difficult technique

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  • Super capacitor and accumulator hybrid energy-storing series type dynamic voltage restorer
  • Super capacitor and accumulator hybrid energy-storing series type dynamic voltage restorer

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Embodiment Construction

[0029] The series-type dynamic voltage restorer for hybrid energy storage of a supercapacitor and a storage battery according to the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] The main circuit diagram of the series dynamic voltage restorer for hybrid energy storage of supercapacitor and storage battery according to the embodiment of the present invention is as follows figure 1 shown, including:

[0031] (1) The charging device for charging the hybrid energy storage system of supercapacitor and battery, including a single-phase rectifier bridge composed of four power diodes D1-D4, a filter composed of inductor L1 and capacitor C1, and three Two electronic switches K1, K2, K3, the capacitor C1 of the filter is connected in parallel on the DC side of the rectifier bridge, the inductance L1 in the filter is connected in series in the charging current circuit, and the electronic switch K1 is connected ...

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Abstract

The invention relates to a series dynamic voltage restorer which adopts a super-capacitor and battery hybrid energy storage system, belonging to the technical field of power equipment. The dynamic voltage restorer comprises a charge device which is used for charging the super-capacitor and battery hybrid energy storage system, a hybrid storage energy system consisting of a super-capacitor and a battery and used for storing the power energy in direct current form, an invert unit which is used for outputting compensation voltage and a boosting filter unit which is used for connecting the dynamic voltage restorer to a power system. The dynamic voltage restorer uses one hybrid energy storage module to realize the energy storage requirement of the direct current side of the restorer to replace the traditional energy storage manner, thus satisfying the compensation need of short-time drop of voltage in the power system. At the same time, compared with the dynamic voltage restorer which adopts a traditional energy storage unit, the dynamic voltage restorer has better dynamic response, longer compensation time and higher performance price ratio and is more environment-friendly.

Description

technical field [0001] The invention relates to a series-type dynamic voltage restorer adopting hybrid energy storage of a supercapacitor and a storage battery, and belongs to the technical field of electric equipment. Background technique [0002] Voltage sag refers to the event that the effective value of the power supply voltage drops suddenly in a short period of time. In the power grid, the duration of this phenomenon is mostly 0.5-1.5s. Voltage sags and interruptions have become the most important power quality problems affecting large industrial businesses. The number of voltage sags is far more than the number of voltage interruptions. Since the number of sags occurs more frequently, overall, the losses caused by sags are huge. [0003] Aiming at the harm of voltage sag, the traditional improvement measures mainly include: [0004] (1) Reduce the sensitivity of the production equipment itself to voltage sags. [0005] (2) Reduce the number of faults in the power g...

Claims

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Application Information

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IPC IPC(8): H02J3/28H02J3/32H02J7/00H02J15/00
Inventor 尹婷陈轩恕杜砚刘飞
Owner WUHAN HIGH VOLTAGE RESEARCH INSTITUTE OF STATE GRID
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