Direct-current bus control system
A technology of DC bus and control system, which is applied in the system of storing electric energy, DC circuit of constant current power supply, parallel operation of DC power supply, etc., can solve the problem of large power fluctuation of renewable energy power supply system, and achieve the effect of efficient control
Pending Publication Date: 2020-07-24
RIKEN
View PDF12 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, since the power fluctuation of the renewable energy power system is large, it is difficult to efficiently control the power fluctuation of the DC bus caused by the output fluctuation and / or load fluctuation of the renewable energy power system
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
[0035] Embodiments of the present invention will be described below with reference to the drawings.
[0036] figure 1 It is an overall configuration diagram of the DC bus control system of the present embodiment. figure 1 The shown DC bus control system includes a renewable energy power supply system, namely, a solar power generation system 10 and a wind power generation system 20 as input power sources. These power generation systems 10 , 20 are connected in parallel with each other, and their output sides are connected to a DC bus 70 . The solar power generation system 10 includes a solar cell 11 and a power converter 12 , and the wind power generation system 20 includes a wind power generator 21 and a power converter 22 .
[0037] The input power supply can be any power supply. When the input power is a renewable energy power system, in addition to the above, it can be a power system that uses energy such as waves and geothermal energy, and it can also be a power system ...
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
This direct-current bus control system for controlling power variation in a direct-current bus connecting an input power supply and a load comprises: a main stabilization device including a first charge / discharge element and a first power converter; and at least one sub-stabilization device including a second charge / discharge element, a charge element, or a discharge element and a second power converter. The first power converter is configured to determine a bus voltage target value corresponding to a stored electricity amount index of the first charge / discharge element, and is configured to bilaterally exchange direct-current power between the first charge / discharge element and the direct-current bus in such a way that the voltage of the direct-current bus matches the bus voltage target value. The second power converter is configured to determine a current target value in accordance with a difference between a threshold value relating to charging or discharging of the second charge / discharge element, the charge element, or the discharge element and the voltage of the direct-current bus, and is configured to exchange direct-current power between the second charge / discharge element,the charge element, or the discharge element and the direct-current bus in such a way that a current equal to the current target value flows through the second charge / discharge element, the charge element, or the discharge element.
Description
technical field [0001] The present disclosure relates to a DC bus (bus) control system (DC bus control system). Background technique [0002] In recent years, power systems using renewable energy such as solar energy, wind power, and waves have attracted attention as an alternative power source to fossil energy and atomic energy, and some of them have been put into practical use. [0003] In this power supply system, the amount of power generated fluctuates greatly depending on the weather, season, location, etc. Therefore, in order to maintain the voltage of the DC bus connected to the power system within a predetermined allowable range, it is desirable to connect power sources such as solar cells and wind generators to the DC bus via a power converter with a wide input range and a large capacity. However, in this case, increasing the capacity of the power converter leads to an increase in size, complexity, and cost of the entire system. [0004] Here, techniques describe...
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 Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/00H02J1/12H02J3/32H02J3/38H02J7/10H02J7/35
CPCH02J1/00H02J1/102H02J1/12H02J15/008H02J3/381H02J7/35H02J2300/24H02J2300/30H02J3/38H02J1/02H02J1/04H02J2300/20
Inventor 山下大之杉山正和津野克彦小池佳代藤井克司和田智之
Owner RIKEN