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Household transformer relationship identification method and system based on characteristic current signals

A technology for current signal and relationship identification, applied in the direction of measuring electrical variables, measuring electricity, measuring devices, etc., can solve the problem of low recognition success rate, and achieve the effect of avoiding external equipment, simple implementation, and easy operation.

Active Publication Date: 2020-01-03
STATE GRID ZHEJIANG ELECTRIC POWER CO MARKETING SERVICE CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in these methods, due to the "co-zero" and coupling of low-voltage power line carrier, micro-power wireless and other communication methods, and the ability to communicate and read across stations, the success rate of recognition is not high, which makes the user change the relationship. Combing poses great challenges

Method used

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  • Household transformer relationship identification method and system based on characteristic current signals
  • Household transformer relationship identification method and system based on characteristic current signals
  • Household transformer relationship identification method and system based on characteristic current signals

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Embodiment 1

[0038] refer to figure 1 and figure 2 , the present invention is based on the household variable relationship identification method of resistance switching, comprising the following steps:

[0039]Step 1. According to the meter address, the master station sends a user-changing relationship identification command to the smart meter with the characteristic current signal sending function. It does not depend on the communication method. It can be through power line carrier, 4G, micro-power wireless, RS485, etc. In order to affect the identification effect of the household transformer relationship, it is only necessary to ensure that the electric energy meter can receive the command of the master station and perform resistance switching.

[0040] Step 2: After the smart meter receives the household transformer relationship identification command, it uses the resistance switching device to generate a current signal of the characteristic code bit in the power grid. The input circ...

Embodiment 2

[0052] The present embodiment provides a system for identifying household-change relationships based on characteristic current signals, which includes:

[0053] Issuing unit of the household transformer relationship identification command: the master station sends the household transformer relationship identification command to the smart meter with the characteristic current signal sending function according to the address of the electricity meter;

[0054] Current signal generation unit: After the smart meter receives the household transformer relationship identification command, it uses the resistance switching device to generate a current signal of the characteristic code bit in the power grid, and records the switching end time locally;

[0055] Target feature code position detection unit: The terminal equipment with handover mining starts to detect the target feature code position on the power line after receiving the household-change relationship identification command; ...

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Abstract

The invention discloses a household transformer relationship identification method and system based on characteristic current signals. The household transformer relationship identification method comprises the following steps that step 1, a master station issues a household transformer relationship identification command to a smart meter with a characteristic current signal sending function according to an electric meter address; step 2, a current signal of a characteristic code bit is generated in an electric network by using a resistance switching device, and the switching end time is recorded locally; step 3, a target feature code bit on a power line is detected after the household transformer relationship identification command is received; 4, whether the target feature code bit is successfully detected or not is judged by a terminal with an alternating current collection function; and 5, the meter switching time and the terminal identification time are measured by the master station, the phase is identified, and the user transformer relationship is determined according to the time scale comparison. According to the method and the system, power outage is not needed, the influence caused by "co-zero", coupling and crosstalk zone problems can be well overcome by controlling the strength of the sending characteristic current signal, and the accurate identification of the household transformer relationship can be realized.

Description

technical field [0001] The invention relates to the field of distribution automation systems, in particular to a method and system for identifying household transformer relationships based on characteristic current signals. Background technique [0002] The household transformer relationship is the power supply ownership relationship between each electricity customer in the station area and the power supply transformer in the station area. The accuracy of the relationship between households and substations is very important in the operation of power marketing business. It is the basis of power distribution services in the district, the basis for the planning of power distribution schemes and the calculation of line loss in the district, and it is also the reference for the optimization of power quality in the district. However, due to current changes in user information, replacement of meter failures, upgrading of station areas, etc., the relationship between households and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 李熊沈广陆春光王伟峰孙钢张旭
Owner STATE GRID ZHEJIANG ELECTRIC POWER CO MARKETING SERVICE CENT
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