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Carrier communication method for automatically adjusting transmitting power of grid-connected and off-grid switching system

A technology of automatic adjustment and transmission power, which is applied in distribution line transmission system, single-network parallel feeding arrangement, line transmission parts and other directions, and can solve problems affecting power quality and reducing reliability of off-grid switching

Active Publication Date: 2022-04-01
云南电网有限责任公司迪庆供电局
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This application provides a carrier communication method that automatically adjusts the transmission power of the on-grid handover system to solve the problems that affect the power quality and reduce the reliability of on-grid handover

Method used

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  • Carrier communication method for automatically adjusting transmitting power of grid-connected and off-grid switching system
  • Carrier communication method for automatically adjusting transmitting power of grid-connected and off-grid switching system

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Embodiment Construction

[0023] The embodiments will be described in detail hereinafter, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following examples do not represent all implementations consistent with this application. These are merely examples of systems and methods consistent with aspects of the present application as recited in the claims.

[0024] This application is a carrier communication and off-grid switching method that automatically adjusts the sending power. Mainly in the grid-connected distributed power generation system, the carrier communication technology is used to automatically adjust the sending power to detect whether the distributed grid-connected power generation system has entered and left the grid state.

[0025] A carrier communication and off-g...

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Abstract

The invention provides a carrier communication method for automatically adjusting transmitting power of a grid-connected and off-grid switching system. The method comprises the steps that a carrier signal generation device is connected with n carrier signal detection devices; the carrier signal generation device transmits power carrier signals to the n carrier signal detection devices; the n carrier signal detection devices return the carrier signal generation device; the carrier signal generating device waits for receipt; if the carrier signal generating device receives n receipts, reducing the transmitting power and returning to the step of waiting for the receipts to finish circulation; if the carrier signal generating device does not receive n receipts, increasing the transmitting power, returning to the receipt waiting step, and completing the circulation; and if n receipts are still not received after the transmitting power is increased, recording the non-receipt grid-connected and off-grid response controller address. Through the dynamic adjustment and optimization of the carrier signal transmitting power, the influence on the electric energy quality in the detection process is greatly reduced while the grid-connected and off-grid switching reliability is ensured, and the minimum power value of the grid-connected and off-grid reliability can also be ensured.

Description

technical field [0001] The present application relates to the technical field of power system protection and control, in particular to a carrier communication method for automatically adjusting transmission power in an on-grid and off-grid switching system. Background technique [0002] With the continuous increase of the scale and capacity of the microgrid, when the power grid is unplanned, the power flow direction, voltage, and frequency in the microgrid will change, and the power supply characteristics of the microgrid will also change dramatically. In order to ensure local disturbance-free switching And reliable power supply requires fast and corresponding switching operation and control of the microgrid. [0003] Current on-grid and off-grid switching methods mainly include remote communication-based on-grid and off-grid switching methods and local on-grid and off-grid switching methods. The local and off-grid switching method is divided into active detection method an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H04B3/46H04B3/54
Inventor 张敏吴万军刘永礼李志成此仁卓玛戴春艳和凤仙吴鹤松吴志林李朋张智和志全
Owner 云南电网有限责任公司迪庆供电局
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