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Power system simulation method and device

A power system and simulation method technology, applied in circuit devices, electrical components, AC network circuits, etc., can solve problems such as long time consumption, large amount of simulation calculation, cascading failure, etc., to reduce simulation time, improve simulation calculation efficiency, and improve Effects of reliability and accuracy

Active Publication Date: 2018-12-14
SICHUAN ENERGY INTERNET RES INST TSINGHUA UNIV +1
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Problems solved by technology

Affected by the connection of the DC system, the traditional AC power grid may contain high-frequency harmonic components, and its transient process can interact with the DC converter equipment, thereby causing cascading failures
Therefore, it is necessary to conduct transient stability analysis on the AC system, but most of the existing simulation analysis techniques require a large amount of simulation calculation and take a long time

Method used

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Embodiment Construction

[0051] With the development of power electronics technology, HVDC technology is gradually being applied to power transmission systems. Affected by the connection of the DC system, the traditional AC power grid may contain high-frequency harmonic components, and its transient process can interact with the DC converter equipment, thereby causing cascading failures.

[0052] After investigation, the inventor found that the electromechanical transient simulation program (Transient Simulation Program, TSP), which is widely used in the transient stability analysis of traditional AC systems, has been unable to meet the simulation requirements of complex transient processes because it ignores the electromagnetic transient process of the network. Although the detailed electromagnetic transient simulation program (Elecromagnetic Transients Program, EMTP) can accurately describe the dynamic process of the AC system, EMTP uses the instantaneous value of the phase component to model, only s...

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Abstract

The embodiment of the invention relates to the technical field of power system simulation, in particular to a power system simulation method and device. The method comprises: obtaining a sequence component frequency shift analysis model of an AC power network, judging whether an asymmetric fault occurs at the current moment, if this does not occur, obtaining first port vectors, analyzing the sequence component frequency shift analysis model to obtain a positive sequence node admittance matrix under the sequence component, calculating a historical current item in the first port vectors, obtaining a node injection current vector of a positive sequence network according to the historical current item in the first port vectors, according to the node injection current vector and the positive sequence node admittance matrix under the sequence component, calculate the positive sequence node voltage by using a positive sequence network node voltage equation, and obtaining the positive sequenceinternal electric quantity in the first port vectors according to the positive sequence node voltage. The method can effectively reduce the simulation calculation amount and the simulation time on the premise of guaranteeing the calculation accuracy.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of power system simulation, and in particular, relate to a power system simulation method and a simulation system. Background technique [0002] With the development of power electronics technology, HVDC technology is gradually being applied to power transmission systems. Affected by the connection of the DC system, the traditional AC power grid may contain high-frequency harmonic components, and its transient process can interact with the DC converter equipment, thereby causing cascading failures. Therefore, it is necessary to analyze the transient stability of the AC system, but most of the existing simulation analysis techniques require a large amount of simulation calculation and take a long time. Contents of the invention [0003] In view of this, the present invention provides a power system simulation method and device, which can effectively reduce the calculation amount of si...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/20
Inventor 宋炎侃陈颖于智同黄少伟沈沉
Owner SICHUAN ENERGY INTERNET RES INST TSINGHUA UNIV
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