Droop control method and system for DC microgrid
A DC micro-grid and control system technology, applied in the direction of load balance in the DC network, parallel operation of DC power supplies, etc., can solve problems such as system-level adjustments that cannot achieve droop characteristics, and achieve the effects of extending life and improving efficiency
Active Publication Date: 2018-09-04
青岛特来电新能源科技有限公司 +2
View PDF9 Cites 7 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] In order to solve the technical problem that the system level adjustment of droop characteristics cannot be achieved in the prior art, the present invention provides a droop control method and system for DC microgrid
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0051] 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.
[0052] First of all, the DC microgrid includes multiple power modules (that is, multiple power supplies), and these power modules may include DC / DC modules and DC / AC modules. Convert the voltage of the energy storage battery or DC load, or convert the output voltage of the energy storage battery or power generation equipment, and output it to the system DC bus; the DC / AC module is used for the system DC bus The voltage is converted and supplied to AC loads etc...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a droop control method and a droop control system for a DC microgrid. The droop control method comprises the steps of: acquiring rated power and current output power of a plurality of power modules to be scheduled; calculating a specific value of a sum of the current output power to a sum of the rated power, and regarding the specific value as an optimal working referencevalue; calculating a specific value of the current output power to the rated power for each power module, and judging whether the power module is positioned at an optimal working point according to the specific value and the optimal working reference value; and for the power module which is positioned at a non-optimal working point, adjusting droop control parameters of a module controller of thepower module until the specific value of the current output power to the rated power of the power module equals the optimal working reference value. By implementing the droop control method and the droop control system, droop properties of the plurality of power modules can be systematically adjusted, so as to achieve the purpose of improving efficiency and prolonging service life.
Description
technical field [0001] The invention relates to the field of electric vehicles, in particular to a droop control method and system for a DC microgrid. Background technique [0002] As the world's energy crisis and environmental pollution become more and more serious, the development and utilization of renewable distributed energy sources are getting more and more attention. In order to avoid the impact of the direct grid connection of distributed power sources on the stable operation of the large power grid, the concept of a micro-grid is proposed. The micro-grid refers to a small power distribution system composed of distributed power The power grid can operate in a network or in isolation, which is an important part of the smart grid. The DC microgrid is a controllable microgrid that connects distributed power sources through the system DC bus in the form of DC power distribution. [0003] At present, the control strategies of DC microgrid system mainly include master-sl...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): H02J1/10H02J1/14
CPCH02J1/10H02J1/14
Inventor 丁刘根孙运杰张亚平王恺于德翔周强
Owner 青岛特来电新能源科技有限公司