Intelligent anti-islanding device and automatic islanding detecting and destroying method

Abstract

The invention discloses an intelligent anti-islanding device and an automatic islanding detecting and destroying method. The intelligent anti-islanding device is characterized by comprising an islanding detecting module, an islanding recognizing module, an islanding destroying module, an islanding alarm module and an islanding transmitting module, wherein the islanding detecting module is connected with the islanding recognizing module, the islanding recognizing module is connected with the islanding destroying module and the islanding alarm module, and the islanding transmitting module is connected with the islanding detecting module, the islanding recognizing module, the islanding destroying module and the islanding alarm module. The intelligent anti-islanding device has the advantages that by detecting and recognizing unintentional islanding automatically by the islanding detecting module, when islanding occurs in a power distribution line of a distributed photovoltaic power generation system, the intelligent anti-islanding device is capable of automatically detecting and recognizing unintentional islanding operation according to acquired line information, alarming automatically to inform a management system timely and controlling the anti-islanding device to switch automatically through a DSP (digital signal processor) controller to switch off the unintentional islanding so as to prevent potential safety hazard caused by manual operation.

Description

technical field [0001] The invention relates to an intelligent anti-islanding device and a method for automatically detecting and destroying an isolated island, belonging to the field of photovoltaic power generation systems. Background technique [0002] With the increase in the number of distributed photovoltaics connected to the distribution network, due to the immature technology in the safety maintenance of the distribution network containing distributed photovoltaics, and the existing low-voltage anti-islanding devices have a low degree of automation and lack comprehensive network source information. The security analysis method cannot meet the operation and inspection requirements of a large number of distributed photovoltaics. Therefore, it is necessary to develop an intelligent anti-islanding device to improve the acceptance of distributed photovoltaics in the distribution network. [0003] For the island detection on the side of the distribution network with distri...

AI Technical Summary

Problems solved by technology

Disadvantages of this method: additional equipment is required, high implementation cost, complex operation, many certifications are required, and low economy

[0005] Although the existing low-voltage anti-islanding device can effectively destroy the operation of unplanned islands and protect the safety of inspection personnel, due to its low level of intelligence and automation, on the one hand, it cannot automatically detect and identify unplanned islands in the line, requiring manual Judging whether an unplanned island has occurred is not conducive to timely destruction of the island; on the other hand, due to the simple structure of the device, when an unplanned island occurs, maintenance personnel need to manually put in the anti-islanding device, and after the unplanned island is destroyed, the device needs to be manually disconnected , inconvenient to use, and cannot fully guarantee the personal safety of the inspection personnel

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