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Modularized dynamic voltage regulating system based on cascade structure

A dynamic voltage regulation and dynamic voltage technology, applied in the field of power equipment, can solve the problem of high harmonic content of the output voltage, achieve large compensation capacity, meet the requirements of electrical isolation, good reliability and operation efficiency.

Active Publication Date: 2014-12-03
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the main circuit topology of the dynamic voltage regulator DVR generally adopts a two-level converter with devices connected in series, a diode-clamped three-level converter and other topologies. The output voltage has high harmonic content, and there are certain shortcomings in application.

Method used

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  • Modularized dynamic voltage regulating system based on cascade structure
  • Modularized dynamic voltage regulating system based on cascade structure
  • Modularized dynamic voltage regulating system based on cascade structure

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Embodiment Construction

[0026] The technical solution of the present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0027] figure 1 It is a structural schematic diagram of a modular dynamic voltage regulation system based on a cascade structure provided by the present invention. figure 1 Among them, the modular dynamic voltage regulation system based on the cascade structure includes a modular dynamic voltage regulator 1, a series transformer group 2 and a rectification and energy storage unit 5; the series transformer group 2 includes three independent transformers: the first transformer 21, The second transformer 22 and the third transformer 23; the modular dynamic voltage regulator 1 contains 2n A-phase power units, 2n B-phase power units and 2n C-phase power units.

[0028] The firs...

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Abstract

The invention discloses a modularized dynamic voltage regulating system based on a cascade structure, which belongs to the technical field of electricity power devices. The system adopts the technical scheme that the system comprises a modularized dynamic voltage restorer, a series transformer set and a rectification and energy storage unit; the series transformer set comprises a first transformer, a second transformer and a third transformer; and the modularized dynamic voltage restorer comprises 2n A-phase power units, 2n B-phase power units and 2n C-phase power units. The modularized dynamic voltage regulating system structurally integrates requirements of a series transformer injection DVR (Dynamic Voltage Restorer) topology and a conventional modular multilevel converter (MMC) on bridge arm inductance, facilitates system redundancy running by adopting high-level modular design, and achieves electric isolation between an electricity power system and the regulating system.

Description

technical field [0001] The invention belongs to the technical field of power equipment, and in particular relates to a modular dynamic voltage regulation system based on a cascade structure. Background technique [0002] With the development of industry, various types of electrical equipment, including power electronic devices, continue to increase. On the one hand, more sources of interference are introduced. Relationship conflicts. Among them, power quality problems such as voltage fluctuations, flicker, and instantaneous drops caused by power load disturbances and power system failures are relatively common, which will cause huge damage to modern industrial systems that require precise control and voltage-sensitive power users. loss. Therefore, it is necessary to take compensation measures to solve the above power quality problems. [0003] Uninterrupted Power System (UPS) is an effective measure to ensure the stability and reliability of the power supply system, but t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02J3/28
CPCY02A30/60
Inventor 杨晓峰郑琼林游小杰贺明智林智钦
Owner BEIJING JIAOTONG UNIV
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