Low-voltage power distribution network topological relation online identification and monitoring method

A technology of low-voltage distribution network and topology relationship, applied in the direction of electrical components, circuit devices, etc., can solve the problems of unclear, incorrect, and unclear topology relationship of distribution transformers.

Active Publication Date: 2020-04-10
SHANDONG ELECTRIC VIVID INFORMATION TECH CO LTD
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AI Technical Summary

Problems solved by technology

Due to the management and line transformation of many old communities, the topological relationship between the distribution transformer outlet and the user is unclear or incorrect, and the corresponding signboard is missing or the signboard is unclear. The establishment of the network topology relationship has caused certain difficulties

Method used

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  • Low-voltage power distribution network topological relation online identification and monitoring method

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specific Embodiment approach

[0028] 1. Use a bidirectional thyristor to control and connect a linear load on the phase line and the neutral line, and adjust the load to change the amplitude of the identification current;

[0029] 2. Use a bidirectional thyristor to control a capacitive or inductive load on the phase line and the neutral line, and adjust the load to change the phase angle and amplitude of the identification current;

[0030] 3. Control the IGBT module to generate multiple pulses synchronously with the power frequency on the load of the phase line and the neutral line, so as to adjust the distortion of the power frequency current waveform.

[0031] The branch current detector includes an on-off type 0.5S class current transformer. The centralized controller includes an embedded control module, a carrier communication module and a bus current detection module. The branch current detector includes an embedded control module, a branch current detection module and a carrier communication modul...

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Abstract

The invention discloses a low-voltage power distribution network topological relation online identification and monitoring method. The method comprises the following steps of 1, using an integrated controller to send a turn-on instruction to an identification current generator at a user terminal, and enabling each branch current detector to monitor the current state information of a branch in realtime and upload the current state information to the integrated controller; 2, when the centralized controller senses that a characteristic current flows through the branch current detector of the branch, recording an address code; turning on other identification current generators one by one in a time-sharing manner; 3, enabling the centralized controller to complete the transformer area topology on-line identification and monitoring through the logic calculation and according to the address code. According to the method, on the basis of not changing an original circuit, and by installing the centralized controller, the branch current detectors and the identification current generators, the low-voltage power distribution network topology structure is obtained, and the change of the powerdistribution network topology structure can be monitored on line in real time, the low-voltage network topology structure can be monitored and reported real-timely, and the power supply reliability and the power grid operation and maintenance management level are improved.

Description

technical field [0001] The patent of the present invention relates to a method for identifying topological structures of distribution networks, in particular to an online identification and monitoring method for topological relationships of low-voltage distribution networks. Background technique [0002] With the development of the pan-power Internet of Things and the continuous improvement of users' requirements for power quality, how to improve the power supply reliability and production management level of the distribution network has become a major problem facing the power industry. Realizing data sharing and comprehensive utilization between marketing and operation and maintenance business systems has become an effective way to solve this problem. The basic work is to establish the topological relationship between "substation-line-household", improve the ledger information of low-voltage equipment, improve the degree of information sharing among various departments of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J13/00
Inventor 邹黎邹旭程艳磊袁礼剑邹雪
Owner SHANDONG ELECTRIC VIVID INFORMATION TECH CO LTD
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