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Analysis method, device, equipment and medium of miif under the control of constant current and constant arc extinguishing angle

A technology of determining the arc extinguishing angle and analysis method, which is applied in the direction of circuit devices, power transmission AC networks, AC network circuits, etc., can solve the problems of inaccurate MIIF analysis, ignore the operating status of DC converter stations, etc., and achieve accurate voltage interaction degree of effect

Active Publication Date: 2021-01-19
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] When implementing the embodiment of the present invention, the inventor found that in the existing analysis of MIIF under the control of constant current and constant arc extinguishing angle, the actual running state of the DC converter station was ignored, resulting in inaccurate analysis of MIIF

Method used

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  • Analysis method, device, equipment and medium of miif under the control of constant current and constant arc extinguishing angle
  • Analysis method, device, equipment and medium of miif under the control of constant current and constant arc extinguishing angle
  • Analysis method, device, equipment and medium of miif under the control of constant current and constant arc extinguishing angle

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Embodiment 1

[0043] see figure 1 , the analysis method of MIIF under the control of constant current and constant arc extinguishing angle provided by the first embodiment of the present invention comprises the following steps:

[0044] S11. Obtain the equivalent admittance corresponding to each converter station according to the operating status of each converter station in the power grid system under the DC constant current constant arc extinguishing angle control mode;

[0045] S12. Obtain an n-order dynamic characteristic equivalent admittance matrix according to the equivalent admittance; wherein, n is the number of AC nodes of the power grid system;

[0046] S13. Obtain the original AC node admittance matrix of the grid system;

[0047] S14. Modify the original AC node admittance matrix according to the dynamic characteristic equivalent admittance matrix, and obtain a node impedance matrix;

[0048] S15. Calculate the multi-infeed DC interaction factor according to the node impedanc...

Embodiment 2

[0078] see figure 2 , figure 2 It is a structural schematic diagram of an analysis device for MIIF under the control of constant current and constant arc extinguishing angle provided by Embodiment 2 of the present invention.

[0079] An analysis device for MIIF under the control of constant current and constant arc extinguishing angle, comprising:

[0080] The equivalent admittance acquisition module 21 is used to acquire the equivalent admittance corresponding to each converter station according to the operating status of each converter station in the power grid system under the DC constant current constant arc extinguishing angle control mode;

[0081] An admittance matrix acquisition module 22, configured to acquire an n-order dynamic characteristic equivalent admittance matrix according to the equivalent admittance; wherein, n is the number of AC nodes of the power grid system;

[0082] AC node admittance matrix acquisition module 23, configured to acquire the original...

Embodiment 3

[0103] See image 3 , image 3 It is a schematic diagram of the analysis equipment of MIIF under the control of constant current and constant arc extinguishing angle provided by Embodiment 3 of the present invention, which is used to implement the analysis method of MIIF under the control of constant current and constant arc extinguishing angle provided by the embodiment of the present invention, such as image 3 As shown, the analysis equipment of MIIF under the control of constant current and constant arc extinguishing angle includes: at least one processor 11, such as CPU, at least one network interface 14 or other user interface 13, memory 15, at least one communication bus 12, communication bus 12 Used to implement connection communication between these components. Wherein, the user interface 13 may optionally include a USB interface, other standard interfaces, and a wired interface. The network interface 14 may optionally include a Wi-Fi interface and other wireless in...

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Abstract

The invention discloses an analysis method of MIIF under constant current and constant arc extinguishing angle control, which comprises the following steps: firstly, obtaining the equivalent admittance corresponding to each converter station according to the operation state of each converter station of the power grid system under the constant current and constant arc extinguishing angle control mode; and then obtaining an n-order dynamic characteristic equivalent admittance matrix according to the equivalent admittance; Wherein n is the number of AC nodes of the power grid system; acquiring anoriginal AC node admittance matrix of the power grid system; Modifying the original AC node admittance matrix according to the dynamic characteristic equivalent admittance matrix, and obtaining a node impedance matrix; a multi-feed DC interaction factor is calculated according to the node impedance matrix. When the equivalent admittance corresponding to each converter station is obtained according to the operation state of each converter station of the grid system under the DC constant current constant arc extinguishing angle control mode, the dynamic response characteristics of the DC transmission system can be considered, and the voltage interaction degree between the DC converter stations can be accurately calculated and evaluated.

Description

technical field [0001] The invention relates to the technical field of direct current transmission, in particular to an analysis method, device, equipment and medium of MIIF under the control of constant current and constant arc extinguishing angle. Background technique [0002] The distribution of energy resources in my country is extremely uneven. Most of the important energy bases are distributed in the remote southwest and northwest regions of China, which are far from the more developed load centers in the southeast. In order to make up for the huge power gap, it is necessary to use a large number of long-distance DC transmission to transmit power to the load center, which leads to the situation that multiple DCs are fed into a certain area, such as my country's East China Power Grid and Southern Power Grid. The DC line with a relatively short electrical distance and the fed AC grid together form a multi-infeed AC-DC system (referred to as a multi-infeed system). Compa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/36
CPCH02J3/36H02J2203/20Y02E60/60
Inventor 张帆赵利刚洪潮
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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