Transient simulation interpolation calculation method for power electronic circuit
A power electronic circuit, transient simulation technology, applied in the direction of calculation, computer-aided design, electrical digital data processing, etc., to achieve high precision and solve the effect of precision reduction
Active Publication Date: 2020-01-31
CHINA SOUTH POWER GRID ELECTRIC POWER RES INST +1
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Problems solved by technology
However, as the scale and complexity of the system increase, the contradiction between the calculation efficiency and accuracy of the electromagnetic transient simulation becomes more and more prominent. The traditional electromagnetic transient simulation method is difficult to meet the demand. The breakthrough electromagnetic transient simulation method
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[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0042] see figure 1 , is a schematic flowchart of a power electronic circuit transient simulation interpolation calculation method provided by an embodiment of the present invention, the method includes steps 1) to 12):
[0043] 1) Obtain the simulation system of the power electronic circuit, and establish the state space equation of the simulation system as:
[0044]
[0045] Among them, t represents the time, x represents the state variable, u represents the ...
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The invention discloses a transient simulation interpolation calculation method for a power electronic circuit. The method comprises the following steps: 1, establishing a state-space equation; 2, starting simulation; 3, updating the state of the switch group, and calculating and storing a parameter matrix; 4, performing iterative solution to obtain a dense output moment tsense and a dense outputstate variable; 5, judging whether a switching action occurs, if yes, setting fsy to be equal to 1 and going to step 7, and otherwise, going to step 6; 6, judging whether fsy is equal to 0, if yes, executing the step 11, and if not, executing the step 9; 7, calculating a switching action moment tinter and a switching action state variable; 8, judging whether the switch state has occurred, if yes,reading the existing data and going to the step 4, and otherwise, going to the step 3; 9, positioning a next simulation step length, calculating a state variable and setting fsy to be equal to 0; 10,judging whether tdens is greater than tinter, if yes, recalculating the dense output state variable, and otherwise, going to the step 11; 11, calculating an output variable; and 12, judging whether the current time is less than the total simulation duration, if yes, going to the step 4, and otherwise, ending the simulation. The method is high in calculation precision.
Description
technical field [0001] The invention relates to the technical field of power electronic interpolation algorithms, in particular to a power electronic circuit transient simulation interpolation calculation method. Background technique [0002] With the large-scale application of power electronic equipment, the power system is facing unprecedented challenges in the coupling and operation control of complex dynamic characteristics. Considering the high-frequency action of power electronic equipment and the interaction between control systems, the electromagnetic transient simulation that can realize microsecond-level simulation has become the first choice for simulation tools. However, as the scale and complexity of the system increase, the contradiction between the calculation efficiency and accuracy of the electromagnetic transient simulation becomes more and more prominent. The traditional electromagnetic transient simulation method is difficult to meet the demand. The brea...
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Inventor 翟鹤峰洪潮赵利刚王长香周挺辉甄鸿越黄冠标吴小珊
Owner CHINA SOUTH POWER GRID ELECTRIC POWER RES INST