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Receiving end alternating current electromagnetic looped network two-step loop opening planning method and system containing direct current feed-in

An electromagnetic ring network and DC feed-in technology, which is applied in the direction of a single AC network with different frequencies, AC network circuits, emergency treatment AC circuits, etc., can solve problems such as differences in importance, reduce the amount of calculation, and improve operational safety , the effect of reducing the optimization space

Pending Publication Date: 2022-05-24
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, there is a significant difference in the importance of the traditional loop solution objective and the goal of avoiding DC cascading failures, and the optimization model of loop solution planning cannot generalize all optimization objectives

Method used

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  • Receiving end alternating current electromagnetic looped network two-step loop opening planning method and system containing direct current feed-in
  • Receiving end alternating current electromagnetic looped network two-step loop opening planning method and system containing direct current feed-in
  • Receiving end alternating current electromagnetic looped network two-step loop opening planning method and system containing direct current feed-in

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Experimental program
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Embodiment 1

[0051] In one or more embodiments, a method for two-step de-loop planning of a receiving-end AC electromagnetic ring network with DC feed is disclosed, aiming at using a two-step optimization framework to solve the problem with DC according to the difference in the importance of optimization objectives. The problem of large optimization space for the de-loop planning scheme of the feeding and receiving end AC electromagnetic ring network. like figure 1 As shown, the main implementation steps of the method are as follows:

[0052] 1. Two-step optimization framework for de-looping of receiving-end AC electromagnetic ring network with DC feed

[0053] The optimization objectives of the loop decoupling planning of the receiving-end AC electromagnetic ring network with DC feed include: avoiding DC cascading faults, reducing the short-circuit current level of the system, ensuring that the system strength is as balanced as possible, improving the transmission margin of high-voltage ...

Embodiment 2

[0112] In one or more embodiments, a two-step de-loop planning system for receiving-end AC electromagnetic ring network with DC feed is disclosed, including:

[0113] It is used to determine the planning objectives of the electromagnetic ring network de-looping considering the DC feed, and the optimization objectives are prioritized according to the difference in importance to form a two-step optimization framework. The first step is aimed at the goal of “avoiding DC cascading failures” with obvious importance and priority, and the second step is based on the results generated in the first step as constraints, and for other de-looping targets, determine the de-looping section composed of AC lines. device;

[0114] It is used to construct the DC correlation matrix according to the multi-feed interaction factors, convert the avoided DC cascading failure into DC grouping, and establish an optimization model with low risk of DC cascading failure in the same group and high risk of ...

Embodiment 3

[0120] In one or more embodiments, a terminal device is disclosed, including a server, the server including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor executing the During the program, the two-step de-loop planning method for the receiving-end AC electromagnetic ring network with DC feed in Embodiment 1 is implemented. For brevity, details are not repeated here.

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Abstract

The invention provides a two-step loop-opening planning method for a receiving-end alternating-current electromagnetic looped network containing direct-current feed-in, and the method comprises the steps: carrying out the priority classification and sorting of optimization targets according to the importance difference, and forming a two-step optimization frame. In the first step, aiming at a direct current cascading failure avoiding target with obviously high importance and priority, and in the second step, taking a result generated in the first step as a constraint condition, aiming at other loop opening targets. The method can be used for the loop opening planning of the electromagnetic looped network of the AC-DC hybrid power grid, comprehensively considers the loop opening requirements of the new electromagnetic looped network related to the DC, and achieves the purposes of avoiding the DC cascading failure, controlling the short-circuit current level, the power flow and the load balance and the like.

Description

technical field [0001] The invention belongs to the technical field of power grid planning, and in particular relates to a two-step loop unwinding planning method and system for a receiving-end AC electromagnetic ring network with DC feed-in. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] In recent years, large power outage accidents related to the structure of the power grid are common at home and abroad, and the existence of high and low voltage electromagnetic ring network is one of the important factors leading to the occurrence of cascading failures. For the traditional AC power grid, relatively complete methods for de-looping the electromagnetic ring network have been established. These methods mainly solve the problems of exceeding the short-circuit current level and the limited transmission capacity of high-voltage AC lines, witho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/02G06N3/12G06Q50/06
CPCH02J3/001H02J3/02G06N3/126G06Q50/06H02J2203/20Y04S10/50
Inventor 王晓辉宋凯歌高峰
Owner SHANDONG UNIV
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