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Frequency elastic force evaluation method for multi-direct-current feed-in receiving end power grid

A multi-DC feed-in and receiving-end power grid technology, applied in electrical digital data processing, CAD network environment, constraint-based CAD, etc., can solve the problems of low power grid load level and insufficient energy supply, and achieve the effect of accurate quantitative evaluation

Pending Publication Date: 2021-02-09
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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  • Frequency elastic force evaluation method for multi-direct-current feed-in receiving end power grid
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  • Frequency elastic force evaluation method for multi-direct-current feed-in receiving end power grid

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Embodiment Construction

[0047] 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.

[0048] A method for evaluating the frequency elasticity of multi-DC feed-in receiving-end power grids, such as figure 1 shown, including the following steps:

[0049] 1. Obtain the grid structure, load value, unit parameters, and UHV DC parameters of the multi-DC feed-in receiving power system;

[0050] 2. Input the grid structure, load value, unit parameters, and UHV DC parameters into the pre-built frequency elasticity force evaluation model;

[0051] 3. Output...

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Abstract

The invention relates to the technical field of power system operation and control, in particular to a frequency elastic force evaluation method for a multi-direct-current feed-in receiving end powergrid. The method comprises the following steps: 1, acquiring a power grid frame, a load value, a unit parameter and an extra-high voltage direct current parameter of a multi-direct-current feed-in 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 frequency elastic force evaluation model; 3, outputting a frequency elastic force evaluation result of the multi-direct-current feed-in receiving end power system. A power grid frequency change curve is obtained through load flow calculation and electromechanical transient simulation under a direct-current blocking fault set, a frequency elasticity evaluation index is obtained after key feature extraction, and accurate quantitative evaluation of the frequency recovery capability of the multi-direct-current feed-in receiving-end power grid is achieved. According to the method, the capability of recovering the frequency ofthe multi-direct-current feed-in receiving-end power grid to the normal operation level after the machine end fails 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 method for evaluating frequency elasticity force of multi-direct current feed-in receiving-end power grids. 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 assessing the frequency stability of multiple DC feed-in receiving end grids is of great importance for grasping the operating characteristics of the grid, optimizin...

Claims

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Application Information

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IPC IPC(8): G06F30/18G06F111/02G06F111/04G06F113/04
CPCG06F30/18G06F2111/02G06F2111/04G06F2113/04
Inventor 张宁宇赵欣高山周前朱鑫要
Owner JIANGSU ELECTRIC POWER RES INST
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