Method for preventing grid-connected island effect of distributed power source

A technology of distributed power supply and islanding effect, applied in the direction of electrical components, single-network parallel feeding arrangement, emergency protection circuit device, etc., can solve the problem of islanding effect detection and other problems, and achieve the effect of preventing islanding effect

Inactive Publication Date: 2010-09-15
SHENZHEN CLOU ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a method to prevent distributed power grid-connected islanding effect, overcome the problem of islanding effect dete

Method used

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  • Method for preventing grid-connected island effect of distributed power source
  • Method for preventing grid-connected island effect of distributed power source
  • Method for preventing grid-connected island effect of distributed power source

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings of the description.

[0030] like Figures 1 to 3 As shown, a distribution network terminal is provided at the end of the distribution network line, and the distribution network terminal is respectively connected to the distribution network and the distributed power supply through the feedback line; the method for preventing the islanding effect of the distributed power supply grid connection includes the following steps:

[0031] Step 1, use the distribution network terminal to collect the operation state quantities of the distribution network feeder and the distributed power grid-connected feeder, the specific operation is as follows:

[0032] Through the voltage transformer TV and current transformer TA, the high voltage on the primary side of the distribution network feeder and the grid-connected feeder of the distributed power supply is transformed into a low voltage...

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Abstract

The invention discloses a method for preventing a grid-connected island effect of a distributed power source. A distribution network terminal is arranged at a distribution network terminal and is respectively connected with a distribution network and a distributed power source through feeder wires. The method for preventing the grid-connected island effect of the distributed power source comprises the following steps of: (a) acquiring the running state quantity of a distribution feeder wire and a distributed power source grid-connected feeder wire by using the distribution network terminal; (b) processing the acquired state quantity in the distribution network terminal to obtain the running conditions of the distribution network and the distributed power source; and (c) processing the grid-connected state of the distributed power source according to the running conditions of the distribution network and the distributed power source. The invention solves the problem of the detection of the side island effect of a grid-connected inverter in the grid-connected running process of the distributed power source and effectively prevents the island effect of the distributed power source caused by grid connection.

Description

technical field [0001] The present invention relates to the technical field of electric power supply and distribution, in particular to a distribution network terminal and distributed power grid-connected technology, Background technique [0002] The power industry standard DL / T721-2000 "Distribution Network Automation System Remote Terminal" defines the distribution network automation system remote terminal as: the distribution network automation system remote terminal is a variety of power distribution circuits used in the distribution network A general term for equipment such as remote terminals, distribution transformer remote terminals, and medium-voltage monitoring units (distribution automation and management system sub-stations). The communication channel is used to complete functions such as data collection and remote control. [0003] Distributed Generation (DG for short) refers to the economical, efficient and reliable power generation using small and medium-size...

Claims

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Application Information

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IPC IPC(8): H02H7/26H02H7/28H02J3/38
Inventor 崔丰曦
Owner SHENZHEN CLOU ELECTRONICS
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