High-frequency modeling method for high-capacity high-frequency transformer
A technology of high-frequency transformers and modeling methods, applied in the field of power systems, can solve the problems that the characteristics of transformer ports cannot be accurately reflected, and the port capacitance model does not consider the magnetic characteristics of transformer windings.
Pending Publication Date: 2021-04-27
HULUDAO POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER +2
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The port capacitance model does not consider the magnetic characteristics of the transformer winding, and cannot accurately reflect the port characteristics of the transformer under lightning overvoltage
The frequency response model simulates the transformer with an RLC series-parallel circuit. In theory, this model can better reflect the port characteristics of the transformer under lightning overvoltage, but there are few literatures on the modeling method and parameter extraction method of this type of model. Therefore, it is necessary to further research
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
[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0023] The basis of the modeling in the present invention is the electrical characteristics of the transformer measured by the impedance tester, so the accuracy of the measurement results must first be ensured. Large-capacity high-frequency transformers are relatively large, and long measurement leads will be used when measuring with an impedance analyzer, sometimes as long as 30 m. Long measurement leads have a greater impact on the measurement results.
[0024] The impedance matching modeling method is a commonly used circuit modeling method, which uses the measured impedance / admittance parameters and combines the mathematical expressions of the empirical formulas to perform curves to obtain an equivalent circuit model.
[0025] The simulation results of the two-port equivalent circuit model agree well with the measured results on various voltage gr...
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 high-frequency modeling method for a high-capacity high-frequency transformer belongs to the technical field of power systems, and comprises the following steps: establishing a double-port equivalent circuit model of the high-capacity high-frequency transformer, namely connecting an impedance Z10, a winding Lm and an impedance Rm in parallel, connecting an impedance Z20 with a winding Ls and an impedance Rs in series, and setting an impedance Z12 between a primary side coil and a secondary side coil, z10, Z20 and Z12 represent the mutual impedance between the primary side and the secondary side, and Z10, Z20 and Z12 parameters can be obtained by using a conventional vector matching method in combination with the measured impedance value and the high-frequency model considering parasitic parameters, so that the corresponding high-frequency model is obtained. According to the method, the equivalent circuit model of the parasitic capacitance is considered, the equivalent circuit model is established on the basis of the actually measured port circuit characteristics of the transformer, and the circuit model can better reflect the electrical characteristics of the transformer.
Description
technical field [0001] The invention belongs to the technical field of power systems, and in particular relates to a high-frequency modeling method for large-capacity high-frequency transformers. Background technique [0002] During the operation of the UHV transmission system, it will bear the threat of power frequency, operation, lightning and other types of overvoltage. Among them, lightning overvoltage has the greatest impact on the UHV system. According to relevant statistics, lightning strike is the main cause of tripping of transmission lines, and lightning overvoltage is one of the important factors leading to insulation failure of power equipment. At the same time, my country is also a mine-prone country, and the eastern coastal areas, South China, West China and parts of central China are the areas with the most frequent lightning activities. UHV transmission lines have long transmission distances, pass through multiple provinces, and have complex climate and terr...
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): G06F30/3308G06F30/3323
CPCG06F30/3308G06F30/3323
Inventor王凯王顺江左越李典阳王兴财刘爽高宜鸣毛振军
OwnerHULUDAO POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER