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Power distribution network island division method based on minimum load loss

A technology of load loss and island division, applied in the field of electric power, can solve the problem of inability to realize island division, and achieve the effect of small loss of power loss

Pending Publication Date: 2019-11-29
STATE GRID ZHEJIANG ELECTRIC POWER CO LTD HANGZHOU POWER SUPPLY CO +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing island division method may include the same load node into multiple islands, which cannot achieve accurate island division

Method used

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  • Power distribution network island division method based on minimum load loss
  • Power distribution network island division method based on minimum load loss
  • Power distribution network island division method based on minimum load loss

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Embodiment Construction

[0048] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.

[0049]The basic idea of ​​this embodiment is to prevent the same load node from being included in multiple islands, and after each distributed power supply is divided into islands, the topological relationship of the nodes included in the islands is cleared in the original information. After the connection relationship with the upstream and downstream nodes is cleared, these nodes will become real "islands", and these nodes cannot be accessed during the power circle search, so as to fully utilize the power supply capacity of distributed power sources and ensure the limited recovery of important loads. On the basis of this, the power loss of the load is minimized.

[0050] Based on the above ideas, an embodiment of the present invention proposes a distribution network island divisi...

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Abstract

The invention relates to the field of electric power, in particular to a power distribution network island division method based on minimum load loss. The method comprises the following steps of: S1,performing a sequence from small to large according to the output of a distributed power supply at a fault moment; S2, in the distributed power supplies which are not subjected to island division, selecting a distributed power supply with the minimum capacity to perform power circle search, simplifying node information, and establishing an island division matrix; S3, selecting a node with the maximum average weight to be brought into an island, and when the node with the maximum average weight is not unique, selecting the node with the maximum accumulated load from the nodes with the maximum weight to be brought into the island; and S4, updating the information in the island division matrix I. According to the method, the topological relation incorporated into the island nodes is reset inthe original information, and the nodes cannot be accessed during power circle search after the connection relation with the upstream and downstream nodes is cleared, so that the power supply capacityof the distributed power supply can be fully utilized, and the minimum power loss of the load is achieved.

Description

technical field [0001] The invention relates to the field of electric power, in particular to a method for dividing distribution network islands based on minimum load loss. Background technique [0002] The distribution network is located at the end of the power system and is the link for power transmission and distribution. The reliability of the power supply of the distribution network directly determines whether users can obtain continuous and stable power supply. Compared with the power transmission and transformation system, the power distribution system has a higher frequency of failures and has a greater impact on user power outages. The application of distributed power makes the distribution network structure more complex. After a fault occurs, the distribution network considering the distributed generation may enter the islanding mode. Setting up a reasonable island division scheme can restore as many out-of-power loads as possible, and at the same time realize th...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/38
CPCH02J3/00H02J3/38Y04S10/52
Inventor 杨翾叶刚进孙可王骏海商佳宜常诚吴梦遥赵天煜陆海波张志鹏何卫斌黄晟王岗徐驰名卫炜
Owner STATE GRID ZHEJIANG ELECTRIC POWER CO LTD HANGZHOU POWER SUPPLY CO
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