A Fractional-order Modeling Method for Three-phase Voltage Source PWM Rectifier
A technology of three-phase voltage and modeling method, which is applied in the direction of electrical components, output power conversion device, AC power input conversion to DC power output, etc. It can solve the problems that the model is not accurate enough, and the fractional order characteristics of inductance and capacitance are not considered. , to facilitate design and analysis, improve operating performance and control effect
Active Publication Date: 2021-07-09
GUANGXI UNIV
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[0005] In order to solve the problem that the traditional three-phase voltage-type PWM rectifier modeling method does not consider the fractional-order characteristics of inductors and capacitors, and the model is not accurate enough, the present invention provides a fractional-order modeling method for three-phase voltage-type PWM rectifiers. The specific technology The scheme is as follows:
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[0085] In order to better understand the present invention, the present invention will be further described below in conjunction with accompanying drawing and specific embodiment:
[0086] figure 1 It is the topological structure diagram of the main circuit of the three-phase voltage type PWM rectifier described in the present invention. figure 1 in, u a , u b , u c is the phase voltage of the three-phase grid; v a , v b , v c Input phase voltage for the AC side of the three-phase voltage type PWM rectifier; i a i b i c is the three-phase input phase current. Since the negative pole N on the DC side of the three-phase voltage-type PWM rectifier is generally not connected to the neutral point 0 on the AC side, no matter whether the three-phase grid voltage is balanced or not, there is i a + i b + i c = 0; L a , L b , L c is the inductance of the three-phase line filter reactor, and its order is α a 、α b 、α c , and 0a ,α b ,αc la , R lb , R lc is the equivale...
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The invention relates to the technical field of power electronic system modeling, in particular to a fractional-order modeling method for a three-phase voltage-type PWM rectifier. The present invention considers the fractional-order characteristics of inductance and capacitance, and proposes to establish three The method of fractional order model of phase voltage PWM rectifier and its corresponding three-phase stationary (a, b, c) coordinate system, two-phase stationary (D, Q) coordinate system and synchronous rotating (d, q) coordinate system The fractional-order model of the three-phase voltage-type PWM rectifier can be conveniently used in the design and analysis of the three-phase voltage-type PWM rectifier and its fractional-order controller to improve the operating performance and control effect. Among them, the fractional order model of the three-phase voltage-type PWM rectifier in the three-phase static (a, b, c) coordinate system can realize high-precision waveform simulation of the three-phase voltage-type PWM rectifier.
Description
technical field [0001] The invention relates to the technical field of power electronic system modeling, in particular to a fractional-order modeling method for a three-phase voltage-type PWM rectifier. Background technique [0002] Fractional calculus is obtained after the calculus order of integer order calculus is extended from integers to non-integer numbers (fractions, irrational numbers, complex numbers). Nature is fractal in nature, and fractional calculus can be used to establish systematically accurate or more accurate fractional mathematical models. [0003] Literature Westerlund S, Ekstam L.Capacitor theory[J].IEEE TRANSACTIONS ONDIELECTRICS AND ELECTRICAL INSULATION and literature Westerlund S.Dead Matter HasMemory[M].Kalmar,Sweden:Causal Consulting research shows that: capacitance and inductance are essentially fractional order Yes, integer-order inductors and capacitors do not exist in actual engineering. The integer-order models used to describe the electrica...
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IPC IPC(8): H02M7/219
CPCH02M7/219
Inventor 徐俊华李啸骢
Owner GUANGXI UNIV