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Switching circuit electromagnetic transient analysis method and device

A technology of switching circuits and analysis methods, used in electrical digital data processing, special data processing applications, instruments, etc.

Pending Publication Date: 2017-02-22
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage of the traditional equation of state method is that the state equation of the circuit cannot be obtained directly in general. It is necessary to select the capacitor voltage and inductor current in the circuit as the state quantity of the circuit. For more complex and medium-scale circuit networks, it is necessary to use the network diagram knowledge of theory, obtained through complex topological analysis
And when there are a large number of ideal switches in the circuit, calculating and saving all possible topological equations will be a computational burden that the computer cannot bear

Method used

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  • Switching circuit electromagnetic transient analysis method and device
  • Switching circuit electromagnetic transient analysis method and device
  • Switching circuit electromagnetic transient analysis method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0191] Such as Figure 5 As shown in a bridge current source rectifier circuit, the digitization module will Figure 5 The circuit topology information is stored in the computer in the form shown in Table 3, and the technical solution provided by the present invention is used for simulation analysis, and the basic step size is set to 2ms.

[0192] Table 3 branch information of the example

[0193]

[0194] Firstly execute the pseudo-code stored in the loop module for No. 1-5 branches in Table 3, and obtain the coefficient matrix by the matrix generation module as formula (25)-(28).

[0195]

[0196]

[0197]

[0198]

[0199] Thus, the system equation (29) and the state equation (30) of the circuit are obtained.

[0200]

[0201]

[0202] in E is a unit diagonal matrix.

[0203] Define the state quantity at time zero as x 0 =(0,0,0,0,900,0,0,0,0,0) T .

[0204] In the first half cycle, at 0+ time, due to the unidirectional conduction characteristic...

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PUM

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Abstract

The invention provides a switching circuit electromagnetic transient analysis method and device. The analysis method includes the steps of establishing a state equation of a circuit, modifying the state equation of circuit topology which changes at the moment of switching motion, reinitializing the potentials of all nodes of the circuit after the switching motion, solving the state equation of the circuit, and conducting switching circuit transient analysis according to calculated state quantities at all moments. The analysis device comprises an equation establishment module, an adjustment module, an initialization module, a switching circuit solving module and a switching transient analysis module. According to the technical scheme, the long-standing problem that it is difficult to compile a state equation of a common circuit network is solved, and the state equation method can be applied to electromagnetic transient analysis of the large-scale circuit network; besides, the method for compiling the state equation is simple, short in calculation time and very suitable for being implemented in computer programming.

Description

technical field [0001] The invention relates to the field of electromagnetic transient numerical simulation of power system circuits, in particular to an electromagnetic transient analysis method and analysis device for switching circuits. Background technique [0002] The damage to the normal operation of the power system is mostly caused by short circuits, such as large short-circuit currents that damage components, voltage drops that cause system cracking or even collapse, and electromagnetic interference to electrical equipment. When a short circuit occurs, the system changes from one state to another, accompanied by complex electromagnetic transient phenomena. [0003] The electromagnetic transient analysis methods of power system include node analysis method and state equation method. [0004] At present, the commonly used software such as EMTP, PSCAD / EMTDC, real-time simulator RTDS and power system electromagnetic transient analysis software mostly use the node analy...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 纪锋魏晓光邱宇峰贺之渊汤广福高冲
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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