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General decoupling method and system for electromagnetic transient simulation of voltage source type converter

A technology of electromagnetic transient simulation and voltage source type, which is applied in the fields of instruments, electrical digital data processing, and special data processing applications, etc. Solve problems such as low simulation efficiency, achieve the effect of decoupling and improve simulation efficiency

Active Publication Date: 2021-07-23
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0015] The purpose of the present invention is to provide a general decoupling method and system for voltage source converter electromagnetic transient simulation, to solve the difficulty in balancing the simulation accuracy and simulation speed efficiency of voltage source converter electromagnetic transient simulation, resulting in simulation efficiency low problem

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  • General decoupling method and system for electromagnetic transient simulation of voltage source type converter
  • General decoupling method and system for electromagnetic transient simulation of voltage source type converter
  • General decoupling method and system for electromagnetic transient simulation of voltage source type converter

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Embodiment Construction

[0075] 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 making creative efforts belong to the protection scope of the present invention.

[0076] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0077] The internal module topology of a common voltage source converter is as follows: Figure 1-3 shown. Complex voltage source converters can be constructed by such as Figure 1-3 The half-bridge, full-bridge...

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Abstract

The invention relates to a general decoupling method and system for electromagnetic transient simulation of a voltage source converter. The method comprises the following steps: determining state equations and switch state tables of equivalent circuits of different voltage source type converters; splitting the state equation, decoupling and delaying a capacitance element and an inductance element, and determining a splitting equation; determining a recursive relationship of the state variable group with respect to a time sequence according to the split equation; obtaining a topological structure of a to-be-simulated voltage source type converter, and determining a decoupling model circuit; determining the on-off state of the to-be-simulated voltage source type converter at the current simulation moment, and constructing a final decoupling model circuit according to the on-off state table; determining an external port voltage according to the final decoupling model circuit; and updating the state variable group at the current simulation moment according to the voltage of the external port and the decoupling model circuit parameters corresponding to the switching state. According to the invention, the simulation efficiency of electromagnetic transient simulation of the voltage source type converter can be improved.

Description

technical field [0001] The invention relates to the field of electromagnetic transient simulation, in particular to a general decoupling method and system for electromagnetic transient simulation of a voltage source converter. Background technique [0002] Electromagnetic transient simulation is an important tool for power system safety and stability analysis, usually divided into real-time simulation and offline simulation. Offline simulation is mainly used in the research of large-scale AC and DC power grids, while real-time simulation is mainly used in the research of the characteristics and control strategies of power electronic equipment because of its high price. [0003] The proposal of the "double high" power system has brought about new changes in the characteristics of power electronic equipment connected to the power system: [0004] 1) The features are more complex. In addition to the traditional two-level voltage source converter (VSC), grid-commutated convert...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/398
CPCG06F30/398G06F30/367G06F2111/10
Inventor 姚蜀军庞博涵许明旺曾子文邱子鉴刘刚张春强马嘉昊汪燕刘晋姚逸凡吴梦童
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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