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MIIF analysis method, apparatus, apparatus and medium under dc constant power and voltage control

An analysis method and technology of DC voltage, applied in circuit devices, AC network circuits, power transmission AC networks, etc., can solve the problems of inaccurate MIIF analysis and ignoring the operational status of actual DC converter stations.

Active Publication Date: 2019-01-11
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When implementing the embodiment of the present invention, the inventor found that in the existing analysis of MIIF under constant power and constant voltage control, the consideration of the operating status of the actual DC converter station was ignored, resulting in inaccurate analysis of MIIF

Method used

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  • MIIF analysis method, apparatus, apparatus and medium under dc constant power and voltage control
  • MIIF analysis method, apparatus, apparatus and medium under dc constant power and voltage control
  • MIIF analysis method, apparatus, apparatus and medium under dc constant power and voltage control

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Embodiment 1

[0043] see figure 1 , the MIIF analysis method under DC constant power and constant voltage control provided by the first embodiment of the present invention includes 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 power and constant voltage 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 impedance matrix.

[0049] It should be noted t...

Embodiment 2

[0077] see figure 2 , figure 2 It is a structural schematic diagram of an analysis device for MIIF under the control of DC constant power and constant voltage provided in Embodiment 2 of the present invention.

[0078] An analysis device for MIIF under the control of DC constant power and constant voltage The analysis device for MIIF under the control of DC constant power and constant voltage includes:

[0079] The equivalent admittance acquisition module 21 is configured 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 voltage control mode;

[0080] 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;

[0081] AC node admittance matrix a...

Embodiment 3

[0102] See image 3 , image 3 It is a schematic diagram of the MIIF analysis equipment under the control of DC constant power and constant voltage provided in the third embodiment of the present invention, which is used to implement the MIIF analysis method under the control of DC constant power and constant voltage provided in the embodiment of the present invention, such as image 3 As shown, the analysis equipment of MIIF under the control of DC constant power and constant voltage 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, and the communication bus 12 uses To realize the 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 interfaces. The memory 15 may inc...

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Abstract

A MIIF analysis method unde constant DC power and constant voltage control is compose of obtaining equivalent admittance corresponding to each converter station accord to operation state of each converter station under constant DC power and constant voltage control mode, and obtaining equivalent admittance corresponding to each converter station according to said equivalent admittance. 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 an original 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 in the DC constant power and constant voltage 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 MIIF analysis method, device, equipment and medium under the control of direct current constant power and constant voltage. 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). Compared wi...

Claims

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Application Information

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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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