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Flexible DC back-to-back asynchronous networking method and system of power load center

A power load and flexible DC technology, applied in the field of power systems, can solve the problems of excessive short-circuit current, multi-DC impact and highlight the risk of large-scale blackout accidents, etc., to increase the average electrical distance, solve the problem of excessive short-circuit current, and simplify the grid structure Effect

Inactive Publication Date: 2016-10-12
GUANGDONG POWER GRID CO LTD
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Problems solved by technology

[0010] The purpose of the present invention is to provide a flexible DC back-to-back asynchronous networking method and system for power load centers to solve the problems of excessive short-circuit current, prominent mutual influence of multiple DCs, and high risk of large-scale blackout accidents

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  • Flexible DC back-to-back asynchronous networking method and system of power load center
  • Flexible DC back-to-back asynchronous networking method and system of power load center
  • Flexible DC back-to-back asynchronous networking method and system of power load center

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Embodiment Construction

[0039] 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.

[0040] The embodiment of the present invention discloses a flexible DC back-to-back asynchronous networking method and system of an electric load center to solve the problems of excessive short-circuit current, prominent mutual influence of multiple DCs, and high risk of large-scale power outage accidents.

[0041] see figure 1 , a flexible DC back-to-back asynchronous networking method for a power load center provided by an embodiment of the present invention, com...

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Abstract

The invention discloses a flexible DC back-to-back asynchronous networking method and a flexible DC back-to-back asynchronous networking system of a power load center. The flexible DC back-to-back asynchronous networking method comprises the steps of: acquiring historical electricity utilization data of the power load center; acquiring power grid structural information of the power load center; dividing a power grid of the power load center into a predetermined number of grouped power grids according to the historical electricity utilization data and the power grid structural information; and establishing a flexible DC back-to-back power transmission system between every two grouped power grids in the predetermined number of grouped power grids, so as to realize asynchronous interconnection among the grouped power grids. By establishing the flexible DC back-to-back power transmission systems, the synchronous power grid of the power load center is isolated into the plurality of synchronous power grids, the power grid structure is simplified, the average electrical distance between the power substations is increased, the mutual influence between the alternating current and the direct current is reduced, and the problems such as short-circuit current standard exceeding, prominent mutual influence of multiple direct currents and high risk of large-scale power outage accidents of the power load center (such as a Pearl river delta power grid) can be effectively solved.

Description

technical field [0001] The present invention relates to the technical field of electric power systems, and more specifically, relates to a method and system for flexible DC back-to-back asynchronous networking of electric load centers. Background technique [0002] With the continuous development of the power system, the current power grid mainly has problems such as excessive short-circuit current, prominent multi-DC interaction, and high risk of large-scale accidents. Specifically, the current Guangdong Power Grid mainly has the following problems: [0003] (1) The power grid is closely connected, and the short-circuit current exceeds the standard [0004] The Guangdong power grid, especially the Pearl River Delta power grid, is closely connected, with a large number of hub stations, a large number of single power plants and substations, and short electrical distances between plants and stations, causing the overall short-circuit current level to exceed the standard. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/10
CPCH02J1/10
Inventor 吴宝英陈松波李峰刘正超吴科成高超刘新苗
Owner GUANGDONG POWER GRID CO LTD
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