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Planned island division method through load gradual loading and aggregation based on network topology structure

A technology of network topology and island division, applied in the direction of AC network circuit, single network parallel feeding arrangement, electrical components, etc.

Active Publication Date: 2016-03-09
STATE GRID CORP OF CHINA +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although some of the proposed algorithms aim to provide a real-time solution, most of them are only suitable for planning analysis or are developed for dispatch control centers to help system operators in decision-making

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  • Planned island division method through load gradual loading and aggregation based on network topology structure
  • Planned island division method through load gradual loading and aggregation based on network topology structure
  • Planned island division method through load gradual loading and aggregation based on network topology structure

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0033] The present invention proposes a planning island division method based on network topological structure load loading aggregation gradually, through the analysis of the fault current at the time of fault and the analysis of the power supply capacity of each power supply (including DG) and the load capacity of each topology branch before the fault, Complete a complete set of fault diagnosis comprehensive solutions based on power distribution automation system for fault isolation and power supply recovery after isolation, that is, healthy areas that lose power, create power supply paths according to topological connection relations, and use tripping operations of effective load balancing switches. Automatically form the division of planning islands. And by jumping off the switch at the time of failure as the starting point, taking the fault current ...

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Abstract

The present invention discloses a planned island division method through load gradual loading and aggregation based on a network topology structure, comprising the steps of: during a fault, locking a fault area by using each power supply as a starting point and using a fault current or a directivity protection criteria as search driving, and performing fault isolation; after the fault isolation, performing microgrid island division through a load loading and aggregation method based on a network topology structure by using a fault isolation boundary tripped isolation switch as a starting point, using a flowing fault current as a search direction and using a power supply overload capability as driving. The load capability of a power supply is used as driving, load is gradually loaded and aggregated through layer-by-layer recursion, i.e. an inverse search method from roots to leaves, then an optimum trend balance point is found, thereby achieving the optimum island division. The planned island division method of the present invention is not according to the prior network definition, and is suitable for power distribution networks with any network topology structures; in addition, the planned island division method is not limited by a DG operation mode, and can be applied in the DG which can return to normal operation after fault isolation.

Description

technical field [0001] The invention relates to the technical field of plan island division, in particular to a method for plan island division based on gradual loading and aggregation of network topology loads. Background technique [0002] Smart grid means that the power system improves the power supply reliability and power supply efficiency of the power grid through automatic prediction and response to system disturbances. In order to realize the smart grid level of power distribution system, various automation technologies have tried to be applied in the fields of metering, protection and control of power distribution system. Among these technologies, the automatic power recovery is an important part of the smart grid, and this part because of the access of distributed power can be attributed to the scheduling management of planned island division and unplanned island after failure. From this point of view, this problem is also closely related to the protection and aut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26H02J3/38
CPCH02H7/262H02J3/38H02J3/388H02J2203/20
Inventor 林霞李强李扬高厚磊邹贵彬王金凤于华陈珊孟庆红魏然宋金秋杜亚程星宇李可李瑶朱新颖张英彬王群魏鑫薛会石磊时永田凤字冯相军廉震王祥军刘朋万卫东孔令元种法超聂坤凯胡太元韩松
Owner STATE GRID CORP OF CHINA
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