Direct-current microgrid bus voltage regulation device and method

A DC microgrid and bus voltage technology, applied in the microgrid field, can solve problems such as line impedance mismatch, bus voltage amplitude and frequency offset, and limited instantaneous response speed, to achieve optimal stability, eliminate voltage fluctuations, The effect of economical and reliable voltage regulation

Inactive Publication Date: 2019-07-23
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the droop control will cause the bus voltage amplitude and frequency to shift, the instantaneous response speed is limited, and the line impedance mismatch will cause the circulation problem

Method used

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  • Direct-current microgrid bus voltage regulation device and method
  • Direct-current microgrid bus voltage regulation device and method
  • Direct-current microgrid bus voltage regulation device and method

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Embodiment Construction

[0037] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0038] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate ...

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Abstract

The invention discloses a direct-current microgrid bus voltage regulation device and method. The direct-current microgrid bus voltage regulating device comprises a series voltage regulator, a voltagesensor, a DSP chip and a PWM controller. The series voltage regulator comprises a dual active full-bridge DC-DC converter and a first full-bridge DC-DC converter; the input end of the dual active bridge-type DC-DC converter is connected with a DC microgrid bus in parallel, and the output end of the dual active bridge-type DC-DC converter is connected with the input end of the first full-bridge DC-DC converter; the output end of the first full-bridge DC-DC converter is connected with the DC microgrid bus in series; the voltage sensor is connected with the DC microgrid bus; one end of the DSP chip is connected with the voltage sensor, and the other end of the DSP chip is sequentially connected with the PWM controller and a power switch tube of the series voltage regulator. The dynamic voltage can be directly injected into the DC microgrid bus to compensate the voltage drop on the DC microgrid bus, so that the voltage of the DC microgrid bus connected with a load can be kept within a specified range, the voltage fluctuation is eliminated, and the DC microgrid bus voltage is not influenced by the load change.

Description

technical field [0001] The invention belongs to the technical field of micro-grids, and relates to a DC micro-grid bus voltage regulating device and method. Background technique [0002] In a low-power DC microgrid, the voltage will continue to drop due to the resistance of the transmission line, and the voltage level at each point of the grid depends on the load power. When the load reaches a critical value and the bus is far away from the original bus, the bus voltage will be lower than the specified limit value, resulting in failure to use normally. [0003] At present, droop control of coordinated distributed power sources is used to solve this problem. Droop control is to select the frequency primary droop characteristic curve similar to traditional generators as the control method of micro-sources, through P / f droop control and Q / V droop respectively. Control to obtain stable frequency and voltage. This control method controls the active power and reactive power outpu...

Claims

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Application Information

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IPC IPC(8): H02J1/12H02M3/335
CPCH02J1/12H02M3/3353
Inventor 陈景文张文倩王培瑞周光荣李晓飞罗熠文肖妍周媛
Owner SHAANXI UNIV OF SCI & TECH
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