Hybrid isolated single-phase power electronic transformer
A power electronics and isolation technology, applied in the field of hybrid isolation single-phase power electronic transformers, can solve the problems of large volume, complex circuit topology, low efficiency, etc.
Active Publication Date: 2021-06-01
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI +2
View PDF8 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] The purpose of the present invention is to overcome the disadvantages of using high-frequency transformers to achieve electrical isolation in existing power electronic transformers, which have the disadvantages of complex circuit topology, low efficiency, and large volume, while using high-frequency capacitors to achieve electrical isolation has the problem that the voltage transformation ratio is fixed and cannot be adjusted problem, a hybrid isolated single-phase power electronic transformer is proposed
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
[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0021] Such as figure 1 As shown, the hybrid isolation type single-phase power electronic transformer of the present invention is composed of a capacitor isolation type converter, a high frequency transformer isolation type converter and a filter inductor Lf. The capacitor-isolated converter is composed of R capacitor-isolated power modules CM-1, CM-2, ..., CM-R connected in cascade, and R is a positive integer. Each capacitive isolation power module includes four connection terminals Z1, Z2, Z3 and Z4. The connection terminal Z2 of the kth capacitively isolated power module CM-k in the capacitively isolated converter is connected to the k+1th capacitively isolated power module CM-(k+1) connecting terminal Z1, 1≤k≤R-1 The connecting terminal Z1 of the first capacitively isolated power module CM-1 in the capacitively isolated converter is conn...
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
A hybrid isolation type single-phase power electronic transformer is composed of a capacitor isolation type converter and a high frequency transformer isolation type converter. The capacitor-isolated converter is composed of multiple capacitor-isolated power modules connected in series on the input side and connected in parallel at the output side, which can realize fixed ratio voltage regulation and electrical isolation. The high-frequency transformer-isolated converter is composed of multiple high-frequency isolated power modules connected in series on the input side and connected in parallel on the output side, which can realize electrical isolation and configurable voltage ratio at the same time. The invention can configure the number of two types of isolated converters and the turns ratio of the primary and secondary coils of the high-frequency transformer according to the voltage level of the power grid connected to the hybrid isolated single-phase power electronic transformer. Compared with the existing capacitive isolation converter topology, the present invention can realize any configuration of voltage level conversion on the high and low voltage sides. The invention realizes the electrical isolation of the high-voltage and low-voltage side circuits of the power electronic transformer through the high-frequency capacitor, and has the advantages of high operating efficiency, small volume and the like.
Description
technical field [0001] The invention relates to a power electronic transformer, in particular to a hybrid isolation type single-phase power electronic transformer. Background technique [0002] Power electronic transformers are based on high-frequency power electronic conversion technology. In addition to realizing the electrical isolation and voltage level conversion functions from high-voltage AC to low-voltage AC or DC, they can also have renewable energy access, energy two-way controllable, and power quality management. And other functions, it has broad application prospects in smart grid, energy Internet, rail transit locomotive traction and other fields. [0003] Most of the power electronic transformers in the existing technology realize the electrical isolation of high and low voltage side circuits through medium and high frequency transformers, and design the transformation ratio of power electronic transformers by configuring the turns ratio of the primary and seco...
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): H02M7/219H02M3/335
CPCH02M3/3353H02M7/219
Inventor 高范强李子欣张宸宇徐飞赵聪张航李耀华王平
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI