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

A technology of determining the arc extinction angle and analysis method, which is applied in circuit devices, power transmission AC networks, AC network circuits, etc., and can solve the problems of ignoring the operation status of DC converter stations and inaccurate MIIF analysis.

Active Publication Date: 2021-05-04
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 power and constant arc extinguishing angle, the actual running state of the DC converter station was neglected, 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 power and constant arc extinguishing angle
  • Analysis method, device, equipment and medium of miif under the control of constant power and constant arc extinguishing angle
  • Analysis method, device, equipment and medium of miif under the control of constant power and constant arc extinguishing angle

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Embodiment 1

[0046] see figure 1 , the analysis method of MIIF under the control of constant power and constant arc extinguishing angle provided by the first embodiment of the present invention includes the following steps:

[0047] 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 power and constant arc extinguishing angle control mode;

[0048] 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;

[0049] S13. Obtain the original AC node admittance matrix of the grid system;

[0050] S14. Modify the original AC node admittance matrix according to the dynamic characteristic equivalent admittance matrix, and obtain a node impedance matrix;

[0051] S15. Calculate the multi-infeed DC interaction factor according to the node impedance...

Embodiment 2

[0086] see figure 2 , figure 2 It is a structural schematic diagram of an analysis device for MIIF under the control of constant power and constant arc extinguishing angle provided by Embodiment 2 of the present invention.

[0087] An analysis device for MIIF under the control of constant power and constant arc extinguishing angle, comprising:

[0088] The equivalent admittance acquisition module 21 is used to acquire the equivalent admittance corresponding to each of the converter stations according to the operating status of each converter station in the power grid system under the DC constant power and constant arc extinguishing angle control mode;

[0089] 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;

[0090] AC node admittance matrix acquisition module 23, configured to acquire the or...

Embodiment 3

[0114] See image 3 , image 3 It is a schematic diagram of the analysis equipment for MIIF under the control of constant power and constant arc extinguishing angle provided by the third embodiment of the present invention, which is used to implement the analysis method for MIIF under the control of constant power 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 power and constant arc extinction angle includes: at least one processor 11, such as CPU, at least one network interface 14 or other user interfaces 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 ...

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Abstract

The invention discloses an analysis method of MIIF under the control of constant power and fixed arc extinguishing angle, which includes: firstly, according to the operating status of each converter station of the power grid system under the control mode of DC constant power and fixed arc extinguishing angle, each converter station is obtained The corresponding equivalent admittance; then obtain the n-order dynamic characteristic equivalent admittance matrix according to the equivalent admittance; wherein, n is the number of AC nodes of the grid system; obtain the original AC node conductance of the grid system The admittance matrix; modifying the original AC node admittance matrix according to the dynamic characteristic equivalent admittance matrix, and obtaining the node impedance matrix; calculating the multi-infeed DC interaction factor according to the node impedance matrix. When obtaining the equivalent admittance corresponding to each converter station according to the operating status of each converter station in the grid system under the DC constant power and constant arc extinguishing angle control mode, the dynamic response characteristics of the DC transmission system can be considered, and then Accurate calculation evaluates the degree of voltage interaction among DC converter stations.

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 power 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). Compare...

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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