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Voltage elasticity evaluation method suitable for AC-DC hybrid receiving end power grid

A technology of AC/DC hybrid connection and receiving power grid, which is applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of low load level of the power grid, insufficient energy supply, etc., and achieve the effect of accurate quantitative evaluation

Pending Publication Date: 2021-02-05
JIANGSU ELECTRIC POWER RES INST +2
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Problems solved by technology

[0002] In western my country, conventional resources such as hydropower and coal are relatively abundant, and the development of new energy sources such as wind power and photovoltaic power generation is becoming more and more mature. Economically developed coastal areas, but relatively insufficient energy supply

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  • Voltage elasticity evaluation method suitable for AC-DC hybrid receiving end power grid
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  • Voltage elasticity evaluation method suitable for AC-DC hybrid receiving end power grid

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Embodiment Construction

[0048] 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 creative efforts fall within the protection scope of the present invention.

[0049] A voltage elasticity evaluation method suitable for AC / DC hybrid receiving end grids, such as figure 1 shown, including the following steps:

[0050] 1. Obtain the power grid structure, load value, unit parameters, and UHV DC parameters of the receiving-end power system including AC-DC hybrid connection;

[0051] 2. Input the grid grid, load value, unit parameters, and UHV DC parameters into the pre-built voltage elasticity evaluation model;

[0052]3. Out...

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Abstract

The invention relates to the technical field of power system operation and control, in particular to a voltage elasticity evaluation method suitable for an AC-DC hybrid receiving end power grid, whichcomprises the following steps: 1, obtaining a power grid frame, a load value, a unit parameter and an extra-high voltage direct current parameter of an AC-DC hybrid receiving end power system; 2, inputting the power grid frame, the load value, the unit parameters and the extra-high voltage direct current parameters into a pre-constructed voltage elastic force evaluation model; and 3, outputting avoltage elasticity evaluation result of the AC-DC hybrid receiving end power system. Through load flow calculation and electromechanical transient simulation under an N2 fault set, an alternating current bus voltage and extinction angle change curve of the direct current inverter station is obtained, a voltage elasticity evaluation index is obtained after key features are extracted, accurate quantitative evaluation of the voltage recovery capability of the AC-DC hybrid power grid is realized, the capability of recovering the voltage to the normal operation level after the short-circuit faultof the AC-DC hybrid receiving-end power grid is evaluated accurately and quantitatively, and support is provided for planning operation of the power grid.

Description

technical field [0001] The invention relates to the technical field of power system operation and control, in particular to a voltage elastic force evaluation method suitable for an AC / DC hybrid receiving end power grid. Background technique [0002] In western my country, conventional resources such as hydropower and coal are relatively abundant, and the development of new energy sources such as wind power and photovoltaic power generation is becoming more and more mature. Coastal areas are economically developed, but energy supply is relatively insufficient. Due to the natural advantages of UHV DC transmission in long-distance transmission and isolation of AC grid faults, it has become the main way to transmit energy from the west to the load center in the east. [0003] Accurately and effectively evaluate the transient voltage stability of the AC / DC hybrid receiving end power grid, which is helpful for grasping the operating characteristics of the power grid, optimizing t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F113/04
CPCG06F30/20G06F2113/04
Inventor 张宁宇赵欣孙蓉周前朱鑫要
Owner JIANGSU ELECTRIC POWER RES INST
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