A control method for grid-connected operation of solar photovoltaic power generation system
A solar photovoltaic and power generation system technology, applied in photovoltaic power generation, single-net parallel feeding arrangement, electrical components, etc., can solve problems such as DC micro-grid or micro-grid group control difficulties, and achieve the effect of reducing communication data
Active Publication Date: 2019-09-10
XIAMEN UNIV OF TECH
View PDF1 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
These situations make it more difficult to control the entire DC microgrid or group of microgrids
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
[0012] Please refer to figure 1 , The present invention implements a method for controlling grid-connected operation of a solar photovoltaic power generation system, including the following steps:
[0013] S1, please refer to figure 2 , To build a solar photovoltaic power generation system grid-connected operation system 100, wherein the photovoltaic power generation system grid-connected operation system 100 includes four sets of solar photovoltaic power generation units (10, 20, 30, 40) and a DC / CD converter (11, 21, 31, 41), and a public load 50, the four groups of solar photovoltaic power generation units jointly supply power to the public load 50 through transmission lines (13, 23, 33, 43);
[0014] S2: Based on the principles of physics, a mathematical model of the grid-connected operation of the solar photovoltaic power generation system is established. The mathematical model belongs to an interconnected system with four nonlinear subsystems;
[0015] S3, based on the mathema...
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 provides a solar photovoltaic power generation system grid-connected operation control scheme. The scheme comprises the following steps: a solar photovoltaic power generation experimental system is firstly built, wherein the solar photovoltaic power generation experimental system comprises four groups of solar photovoltaic power generation devices provided with DC / DC converters, and a common load, and the four groups of solar photovoltaic power generation devices together provide electric energy for the load; then, according to a physics principle, a mathematical model for the solar photovoltaic power generation experimental system is built, wherein the mathematical model belongs to an interconnection system with four nonlinear subsystems; and finally, based on the mathematical model, a distributed sampling event trigger controller is designed, and a simulation test platform for the system is given. According to the grid-connected operation control scheme provided by the invention, safe and stable micro power grid operation can be ensured, and communication data between power generation units are significantly reduced.
Description
Technical field [0001] The invention relates to a design method for grid-connected operation of a solar photovoltaic power generation system. Background technique [0002] As environmental pollution intensifies, people have begun to increase the construction of new energy micro-grids. Compared with the AC power grid, the DC power grid has the characteristics of high power transmission efficiency, elimination of frequency control, and easy connection with DC loads, and has been widely studied. However, for a DC microgrid with multiple new energy power generation units and a DC microgrid group composed of multiple DC microgrids, the stability of a single power generation system cannot guarantee the stable operation of the entire microgrid or microgrid group. In addition, DC / DC converters are widely used in DC microgrids, which have inherent nonlinearity. These situations make it more difficult to control the entire DC microgrid or microgrid group. Summary of the invention [0003...
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 Patents(China)
IPC IPC(8): H02J3/38
CPCH02J3/383H02J2203/20Y02B10/10Y02E10/56
Inventor 钟智雄邵振华孙园曾建斌徐敏陈溪浚陈文塔
Owner XIAMEN UNIV OF TECH