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A Method for Establishing the Steady-state Operation Mode of the Electromagnetic Transient Model of AC-DC Large Power Grid

An electromagnetic transient model and steady-state operation technology, which is applied in the direction of AC network circuits, electrical components, circuit devices, etc., can solve the problem that it is difficult to establish a steady-state operation mode for an electromagnetic transient real-time simulation model

Active Publication Date: 2019-02-22
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology

Solved the problem that it is difficult to establish a steady-state operation mode for an electromagnetic transient real-time simulation model containing hundreds of generators and multiple DC circuits

Method used

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  • A Method for Establishing the Steady-state Operation Mode of the Electromagnetic Transient Model of AC-DC Large Power Grid
  • A Method for Establishing the Steady-state Operation Mode of the Electromagnetic Transient Model of AC-DC Large Power Grid
  • A Method for Establishing the Steady-state Operation Mode of the Electromagnetic Transient Model of AC-DC Large Power Grid

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Embodiment Construction

[0026] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] 1. Steady-state establishment plan

[0028] According to the parameters required to establish the power grid, a large-scale AC-DC power grid electromagnetic transient simulation model including generators, transformers, transmission lines, loads and DC transmission systems is established. The steps to establish the steady state operation mode are as follows:

[0029] 1. Model establishment

[0030] When establishing a large-scale AC / DC power grid electromagnetic transient simulation model, each generator needs to establish two sets of speed control controllers and excitation controllers. One set is the internal default controller, which is the general controller, and the internal controller It can be initialized, and the power flow calculation result can be used as the initial state; the other set is an external controller...

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Abstract

The invention relates to a steady-state operation mode building method for an electromagnetic transient model of an AC / DC large power grid. The method comprises the following steps of building two sets of speed regulation controllers and excitation controllers for each power generator; limiting the frequencies of all power generators to be (1+ / -0.002)p.u and damping to be 200p.u; sequentially switching general speed regulation controllers into actual speed regulation controllers and sequentially switching general excitation controllers into actual excitation controllers according to a sequence of power generation capacities of the power generators from large to small; sequentially unlocking DC power transmission systems according to a sequence of DC power transmission capacities from large to small; restoring damping coefficients of all power generators to damping coefficients of actual power generators; and restoring frequency limiting values of all power generators to frequency limiting values of actual power generators. A coordinative control method of full-network power generator speed regulation and excitation systems is used for starting the large power grid, and the problem of difficulty in building a steady-state operation mode in the electromagnetic transient real-time simulation model containing hundreds of power generators and multi-loop direct current is solved.

Description

technical field [0001] The invention relates to the field of electromagnetic transient simulation of a large power grid, in particular to a method for establishing a steady-state operation mode of an electromagnetic transient model of an AC and DC large power grid. Background technique [0002] With the rapid development of my country's power grid, the scale of the power grid is getting bigger and bigger, and the multi-circuit AC and DC UHV is put into operation. research. Therefore, it is necessary to establish an electromagnetic transient simulation model of a large power grid including hundreds of generators and multiple DC circuits. [0003] In the current electromagnetic transient simulation, the simulation model of the power grid is directly started, and the steady state is entered through automatic adjustment. For a large-scale electromagnetic transient system with hundreds of generators and multi-circuit DC transmission system, multiple generators start at the same ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00
Inventor 朱艺颖董鹏胡涛刘翀王薇薇习工伟谢国平
Owner CHINA ELECTRIC POWER RES INST
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