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Method and device for determining extra-high voltage AC-DC power transmission capability coupling relationship of receiving end system

A technology of AC and DC power transmission and UHV DC, applied in the direction of power transmission and AC network, etc., can solve the problem of not forming a unified

Pending Publication Date: 2020-11-20
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, in the simulation calculation of the actual power grid, there is no uniform calculation method suitable for the coupling relationship of AC-DC transmission capacity of the large-scale UHV AC-DC hybrid grid under DC faults. Research on Calculation Method of UHV AC-DC Transmission Capability Coupling Relationship

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  • Method and device for determining extra-high voltage AC-DC power transmission capability coupling relationship of receiving end system
  • Method and device for determining extra-high voltage AC-DC power transmission capability coupling relationship of receiving end system
  • Method and device for determining extra-high voltage AC-DC power transmission capability coupling relationship of receiving end system

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Embodiment Construction

[0040] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar promotions without violating the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.

[0041] figure 1 It is a flow diagram of a method for determining the coupling relationship of UHV AC / DC transmission capacity of the receiving system provided by this application. The following is combined with figure 1 The method provided by this application is described in detail.

[0042] Step S101, determining the UHV AC / DC power of the power grid in the initial operation mode of the AC / DC hybrid receiving end power grid.

[0043] After a DC fault, problems such as power flow transfer of UHV AC and DC lines, st...

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Abstract

The invention discloses a method and a device for determining an extra-high voltage AC-DC power transmission capability coupling relationship of a receiving end system, and solves a demand problem ofa method for calculating the extra-high voltage AC-DC power transmission capability coupling relationship of the receiving end system restricted by a DC fault. When an extra-high voltage AC-DC receiving end system is restricted by the DC fault, the AC-DC power transmission capability coupling relationship is calculated to determine the AC-DC power transmission power, calculation efficiency can besignificantly improved, manpower and material resources are saved, and obvious economic benefits are created.

Description

technical field [0001] The application relates to the field of safe and stable operation of power grids, and specifically relates to a method for determining the coupling relationship of UHV AC / DC transmission capacity of a receiving system, and at the same time relates to a device for determining the coupling relationship of UHV AC / DC transmission capacity of the receiving system. Background technique [0002] With the large-scale development of UHV DC, the power impact caused by DC faults has become a key factor affecting the safe and stable operation of power systems. With the continuous improvement of UHV DC power, large-scale power will be transferred through UHV AC sections after UHV DC disturbances or blocking faults, resulting in heavy loads on UHV AC lines, and even exceeding the static stability limit of AC lines Or the limit of thermal stability, which leads to the disconnection of the AC line. The large-scale transfer of power flow may lead to steady-state low v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/36
CPCH02J3/36Y02E60/60
Inventor 赵丹习工伟徐式蕴贾俊川沈琳邹运陶向红王虹富常松张鑫
Owner STATE GRID CORP OF CHINA