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Electromagnetic transient simulation algorithm based on matrix decomposition method

An electromagnetic transient simulation and matrix decomposition technology, which is applied in design optimization/simulation, calculation, electrical digital data processing, etc., can solve the problems of long simulation time, large amount of LU decomposition, and large amount of calculation for inverse matrix

Inactive Publication Date: 2017-01-18
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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Problems solved by technology

[0004] However, the traditional electromagnetic transient simulation model can achieve better results when the number of switches is small. When there are too many switching elements, the amount of LU decomposition is large, and the calculation of the inverse matrix is ​​also large, resulting in time-consuming simulation. longer

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  • Electromagnetic transient simulation algorithm based on matrix decomposition method
  • Electromagnetic transient simulation algorithm based on matrix decomposition method
  • Electromagnetic transient simulation algorithm based on matrix decomposition method

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Embodiment Construction

[0041] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.

[0042] In the transient simulation of power electronic switching components designed for DC transmission, microgrid, etc., due to the high switching frequency, the system topology changes after the switching action, and the LU decomposition needs to be re-decomposed at each time step, which takes a lot of time, so it is difficult to analyze the electronic switching components. Do a quick simulat...

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Abstract

The invention relates to an electromagnetic transient simulation algorithm based on a matrix decomposition method. The electromagnetic transient simulation algorithm comprises the steps of rearranging node number in an electromagnetic transient model to obtain a node admittance matrix; carrying out matrix decomposition on the node admittance matrix; solving a reverse matrix of an LY matrix to obtain an LY reverse matrix shown in the description; judging whether on-off action occurs or not; when on-off action occurs, calculating the change part delta Y of a node admittance matrix Y; according to the description, correcting the matrix shown in the description to obtain a matrix shown in the description; and solving a power system equation by utilizing the matrix shown in the description. According to the electromagnetic transient simulation algorithm based on the matrix decomposition method, LU decomposition is small, the calculated quantity for finding the inverse matrix is small, and the time consuming for simulation is short.

Description

technical field [0001] The invention relates to the technical field of electromagnetic transient simulation, in particular to an electromagnetic transient simulation algorithm based on a matrix decomposition method. Background technique [0002] With the rapid development of DC power transmission in my country, the demand for electromagnetic transient simulation of AC power grids is gradually increasing. Similarly, the microgrid is also one of the hot issues in current research. The key technologies of the microgrid can be divided into two categories: power electronics technology and protection control technology. What these two research hotspots have in common is the need to simulate systems containing power electronic switches. [0003] In the related art, for the electromagnetic transient simulation of AC and DC power grids, each switching action needs to perform LU decomposition on the system admittance matrix (LU decomposition is a kind of matrix decomposition, and a m...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 沈鑫闫永梅曹敏周年荣黄星张林山唐立军邹京希魏龄赵旭仝子靖
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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