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Reactance arrangement method for limiting short-circuit current of power grid and related device

A technology of short-circuit current and layout method, which is applied in the direction of emergency protection circuit device, circuit device, emergency protection circuit device, etc. for limiting overcurrent/overvoltage, and can solve the problem of poor effectiveness and economy of reactance layout scheme and selection of impedance The layout is not targeted and other issues, to achieve the effect of reducing the amount of reactance

Pending Publication Date: 2021-05-04
POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD
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Problems solved by technology

[0004] This application provides a reactance arrangement method and related devices for limiting the short-circuit current of the power grid, which are used to solve the technical problem that the selection and arrangement of the impedance in the prior art is not targeted, resulting in poor effectiveness and economical efficiency of the reactance arrangement scheme

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  • Reactance arrangement method for limiting short-circuit current of power grid and related device
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  • Reactance arrangement method for limiting short-circuit current of power grid and related device

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[0047] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0048] For ease of understanding, see figure 1 , an embodiment of a reactance arrangement method for limiting the short-circuit current of the power grid provided by the present application, including:

[0049] Step 101, perform power flow calculation on a preset power system model to obtain operating state parameters of the power grid.

[0050] The preset power ...

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Abstract

The invention discloses a reactance arrangement method for limiting short-circuit current of a power grid and a related device, and the method comprises the steps: carrying out the load flow calculation of a preset power system model, and obtaining the operation state parameters of the power grid; on the basis of an equivalent voltage source theorem, calculating the short-circuit current of each node of the power grid according to the operation state parameters; selecting an overproof short-circuit current from the short-circuit current through a short-circuit current threshold value; and calculating series reactance according to the maximum standard-exceeding short-circuit current, and arranging the series reactance on a branch where a node corresponding to the maximum standard-exceeding short-circuit current is located. The technical problem that the reactance arrangement scheme is poor in effectiveness and economical efficiency due to the fact that impedance selection and arrangement in the prior art are not targeted is solved.

Description

technical field [0001] The present application relates to the technical field of electric power transmission and distribution, and in particular to a reactance arrangement method and related devices for limiting short-circuit current of a power grid. Background technique [0002] The scale of the power grid is expanding day by day, power plants and load capacity are increasing accordingly, and the short-circuit current level of the power grid is also increasing. The grid concentration and load concentration cause the short-circuit current to seriously exceed the standard. When the short-circuit current of the grid increases to a certain level, it will exceed the rated breaking current of the circuit breaker. When there is a grid fault, the circuit breaker cannot block the fault current and the accident will expand. risk. Excessive short-circuit current has seriously restricted the arrangement of the power grid, significantly weakened the reliability of the power grid, and c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/06H02H9/02
CPCH02J3/00H02J3/06H02H9/021
Inventor 高海翔苗璐刘嘉宁林湘宁曾凯文
Owner POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD
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