Fast parameter identification method for chaotic ferromagnetic resonance system in coal mine power grid
A ferromagnetic resonance and parameter identification technology, which is applied in the field of fast parameter identification and can solve problems such as difficulty in obtaining accurate parameters.
Active Publication Date: 2020-08-11
CHINA UNIV OF MINING & TECH
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The finite time identification method can identify system parameters in a finite time, but it is limited by the limitation of finite time stability—it is affected by the initial conditions of the system, and the initial conditions of the system are generally difficult to obtain accurate parameters in coal mine power grids
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
[0099] Example: Fast parameter identification method for chaotic ferromagnetic resonance system of coal mine power grid
[0100] according to figure 1 The chaotic ferromagnetic resonance system of the coal mine power grid and figure 2 The mathematical modeling of the equivalent circuit of the chaotic ferromagnetic resonance system of the coal mine power grid is shown as follows:
[0101]
[0102] Among them, Ф is the magnetic flux of the transformer excitation inductance, V is the voltage of the excitation inductance; R and C are the resistance and capacitance in the equivalent circuit of the chaotic ferromagnetic resonance; ω and E are the angular frequency and the power supply voltage of the power supply voltage; a 0 and b 0is the magnetization characteristic parameter of transformer excitation inductance, and t is time. For the convenience of derivation, we carry out dimensionless processing on the above model, so that the chaotic ferromagnetic resonance system model...
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 rapid parameter identification method for a chaotic ferroresonance system of a coal mine power grid, and is suitable for the field of electrical engineering. The method designs a nonlinear controller according to a fixed time stability theory and combines with a traditional adaptive control method, so that the control amount can reach any small neighborhood of the reference value in a limited time. More specifically, the method has the advantages that: uncertain parameters of the chaotic ferroresonance system of the coal mine power grid can be identified in a limited time without depending on the initial value; the time range of a parameter identification can be guaranteed to have an upper bound, and the upper bound of the recognition time can be calculated by themethod provided by the present invention; and ferroresonance parameters can be rapidly and accurately acquired, thereby providing a parameter support for preventing and controlling abnormal operationsof transformer overvoltage and overcurrent, and providing a theoretical basis and a technical support for safety operation research of the coal mine power grid.
Description
technical field [0001] The invention designs a fast parameter identification method, which is especially suitable for the fast parameter identification method of a chaotic ferromagnetic resonance system of a coal mine power grid used in the field of electrical engineering. Background technique [0002] Ferromagnetic resonance is an oscillation phenomenon of nonlinear inductance and capacitance in a power system. It is a complex electrical phenomenon. It may occur in a power transformer or an electromagnetic voltage transformer (PT) and a reactor with an iron core. In the loop formed by non-linear inductance elements and capacitance elements. So far, scholars at home and abroad have studied ferromagnetic resonance for a hundred years, but ferromagnetic resonance still occurs frequently in power systems, and various harmonic elimination measures cannot completely eliminate ferromagnetic resonance. The main reason is that the generating circuit of ferromagnetic resonance is ex...
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): G05B13/04
CPCG05B13/042
Inventor 马草原李志杰王法鑫张勇刘鹏娟郑海广智静茹陈楚张人懿王伟赵冬艳许智恒陈琦闫龙
Owner CHINA UNIV OF MINING & TECH