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An optimization realization method of simulating the hysteresis of a transformer based on a J-A model

A technology for simulating transformers and implementation methods, applied in design optimization/simulation, instrumentation, electrical digital data processing, etc., can solve problems such as accelerated calculation speed and unstable hysteresis model values, and achieve faster calculation speed, accurate and reliable implementation methods , the effect of solving the problem of numerical instability

Pending Publication Date: 2019-03-08
INTEGRATED ELECTRONICS SYST LAB +1
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Problems solved by technology

[0004] In order to solve the above-mentioned technical problems, the present invention provides a method for optimizing the hysteresis of a simulated transformer based on the J-A model, adopting the method of differential discretization to realize the hysteresis discrete model, and solving the hysteresis model when the large step size is simulated by interpolation Numerical instability problem, further speeding up the calculation speed by optimizing the implementation process

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  • An optimization realization method of simulating the hysteresis of a transformer based on a J-A model
  • An optimization realization method of simulating the hysteresis of a transformer based on a J-A model
  • An optimization realization method of simulating the hysteresis of a transformer based on a J-A model

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Embodiment Construction

[0049] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. A method for realizing optimization of analog transformer hysteresis based on J-A model, comprising the following steps:

[0050] Step 1. Calculate the parameters of the hysteresis model according to the rated parameters of the transformer, that is, the parameters of the J-A model. It is not necessary to give the specific number of turns and the length of the iron core. The specific method is as follows:

[0051] The rated parameters of the transformer are: system frequency f, rated magnetic flux density Bn, rated voltage Vn, air-core reactance Xa, excitation current Im, find the product of the core area A and the number of turns N and the ratio of the core length l to the number of turns N.

[0052] First, the rated flux linkage λn is calculated according to the rated voltage Vn and the system frequency f, as shown in formula (1),

[0053]

[0054] Fr...

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Abstract

The invention discloses an optimization realization method of simulating the hysteresis of a transformer based on a J-A model. the method comprises the steps of obtainING the voltage Un at both ends of the transformer excitation winding connected with the current source, and then obtaining the flux linkage by integrating the voltage, and connecting the hysteresis model to both ends of the transformer winding in the way of the current source; obtainig the parameters of the hysteresis model according to the rated parameters of the transformer; obtaining the magnetic induction intensity B and discretizing the hysteresis model by difference method; solving the influence of step size on numerical stability by interpolation between adjacent computational point; according to the characteristic that only a part of the formulas are sensitive to numerical value, optimizing the calculation process of hysteresis model. The invention adopts the difference discretization mode to give a hysteresis discrete model which is convenient to realize, solves the problem of numerical instability of the hysteresis model in larger step-size simulation through interpolation, and further accelerates the calculation speed through the optimization realization process.

Description

technical field [0001] The invention belongs to the field of electromagnetic transient simulation of electric power system, and in particular relates to an optimization realization method of hysteresis simulation transformer based on J-A model. Background technique [0002] With the rapid development of the power grid, the scale of DC transmission is getting larger and larger. The DC transmission system will cause serious saturation of the transformer core in the AC system of the main grid, which will affect the safe operation of the transformer and further lead to large inrush currents, non-periodic components and Misoperation of higher harmonic protection. In the distribution network, due to the large number and large capacity of distribution transformers on the feeder line, the excitation inrush currents generated by the transformers downstream of the feeder circuit breaker are superimposed on each other, and a large excitation inrush current may also be generated, which ...

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Application Information

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IPC IPC(8): G06F17/50G06Q50/06H02J3/00
CPCH02J3/00G06Q50/06G06F30/20H02J2203/20
Inventor 张庆华范圣韬彭小燕张东院
Owner INTEGRATED ELECTRONICS SYST LAB
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