Micro-grid accurate reactive power distribution method based on distributed one-way communication mode
A power distribution and one-way communication technology, which is applied in the direction of single-net parallel feeding arrangement, electrical components, circuit devices, etc., can solve the problem of large amount of communication data, weak communication network robustness, and inability to accurately distribute loads in micro-grids Power and other issues, to achieve the effect of simple communication, avoiding reactive power circulation, and accurately distributing reactive power
Active Publication Date: 2020-07-28
CHONGQING UNIV
View PDF2 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0008] In view of this, the purpose of the present invention is to provide a method for precise reactive power distribution of microgrids based on distributed one-way communication to solve the problem that the reactive power of microgrids in the technology cannot be accurately distributed according to the rated capacity. Problems such as weak network robustness and large amount of communication data
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
[0040] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0041] In this embodiment, the microgrid precise reactive power distribution method based on the distributed one-way communication mode, the control part of each distributed power generation unit in the microgrid includes a controller, and the control part of each distributed power generation unit in the microgrid The control part also includes the communication layer and the compensation function of the second layer.
[0042] In each distributed generation unit: the communication layer inputs the reactive power and reactive power droop coefficient of the previous distributed generation unit into the second layer compensation function for processing, and the second layer compensation function sends the processed virtual impedance value to To the main controller, the main controller distributes reactive power by droop control and virtual impedance value;...
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 discloses a micro-grid accurate reactive power distribution method based on a distributed one-way communication mode. The method comprises the following steps: introducing a second-layercompensation function and a communication layer on the basis of a conventional virtual impedance method, and building a communication mechanism among all distributed power generation units in a micro-grid. According to the invention, the virtual impedance of each distributed power generation unit is adjusted according to a reactive droop coefficient, so accurate reactive power distribution amongthe distributed power generation units in the micro-grid is realized; the communication layer without a centralized controller is formed by adopting low-bandwidth wireless communication; the first distributed power generation unit and the second distributed power generation unit exchange reactive power and reactive droop coefficient information with each other, and the rest distributed power generation units only need to know the information of a previous distributed power generation unit, so the advantages of the conventional virtual impedance method are reserved, and reactive circulation caused by line impedance difference can be avoided; and the method has the advantages that communication is simple, a data size is small, operation can still be conducted when communication faults happen, and reactive power is accurately distributed among all the distributed power generation units.
Description
technical field [0001] The invention relates to the technical fields of distributed power generation and micro-grid, in particular to a method for distributing reactive power of a micro-grid. Background technique [0002] In order to expand the power capacity of the microgrid, each distributed generation unit is connected to the AC bus of the microgrid in parallel to meet the increasing load power demand. The key to the stable operation of this type of microgrid is to solve the problem of power distribution among distributed generation units. [0003] Droop control is widely used in microgrid control systems without interconnection lines because of its adjustment characteristics of "voltage frequency-active power" and "voltage amplitude-reactive power", so that each distributed generation unit can be adjusted according to its rated capacity Proportional distribution of active and reactive power in the microgrid system. Since the system frequency of the microgrid is equal e...
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): H02J3/50H02J3/38H02J13/00
CPCH02J3/381H02J3/50Y02E40/70Y04S10/12
Inventor 陈家伟侯帅丞方觅黄智勇张财志
Owner CHONGQING UNIV