low-voltage power distribution network end sensing system and method based on the Internet of Things

Abstract

The invention discloses a low-voltage power distribution network tail end sensing system based on the Internet of Things. The low-voltage power distribution network tail end sensing system comprises adistrict intelligent sensing terminal, a branch box monitoring unit, a meter box monitoring unit and a user power supply monitoring module. The district intelligent sensing terminal is in communication connection with the branch box monitoring unit and the meter box monitoring unit, informs to identify a physical topological relation and obtains operation state data of each line of the low-voltage power distribution network and user electric energy meter data; And the meter box monitoring unit is connected with the user power supply monitoring module to obtain a user switch state. The invention further discloses a method using the low-voltage power distribution network tail end perception system based on the Internet of Things. Functions of an existing power utilization information acquisition system are enriched, a multi-level physical topology on-line identification function is achieved, technical support and support are provided for deepening business expansion application such aslean line loss analysis, the particle size of data acquisition is improved through periodic data synchronous acquisition, and reliable data support is provided for big data analysis.

Description

technical field [0001] The invention relates to the field of power transformation and distribution, in particular to a low-voltage distribution network terminal sensing system and method based on the Internet of Things. Background technique [0002] Constrained by the design goals and technical conditions of the meter reading system for the electricity consumption information collection system, the data collection range and real-time performance of the current low-voltage distribution network operation management are insufficient. Timely reporting, terminal power supply quality and other aspects still cannot meet the requirements of low-voltage power grid operation and management. [0003] The main problems existing in the current low-voltage distribution network include: [0004] (1) The reasons for not having the ability to report power outages in real time are as follows: [0005] ①Using the power line carrier communication channel, if the low-voltage user side loses po...

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Problems solved by technology

[0005] ①Using the power line carrier communication channel, if the low-voltage user side loses power, the power supply line from the low-voltage side to the user end must be disconnected, and the communication must also be interrupted at the same time. Naturally, the information on the meter side cannot be reported if the channel is lost;

[0006] ② Electric energy meters and collectors on the user side have no backup power supply, and cannot work when power is lost, and have no ability to report;

[0007] ③ RS-485 interface electric energy meter, the collector is external, and the attribute of RS485 interface stipulates that the electric energy meter cannot actively report data

[0008] (2) The problem of inaccurate basic files of household transformer relationship in the low-voltage distribution network station area

[0010] ① Judging whether the user belongs to the station area by means of a power outage in the entire station area, which will easily lead to a decrease in the reliability of power supply, and the workload is heavy, so it is not easy to implement;

[0011] ②The household variable relationship is identified one by one by the hand-held device. The workload is heavy. After the on-site operating environment is changed, such as the cutting of the station area, the calibration of the household variable relationship needs to be re-calibrated, and the workload of repeated testing is heavy;

[0012] ③Use the low-voltage power line carrier scheme to realize household variable relationship identification, low-voltage power line carrier zero crossing or signal quality judgment method, due to the serious crosstalk of low-voltage power line carrier, the recognition accuracy is not high

[0013] (3) The data collection granularity of low-voltage distribution network is difficult to meet business needs

[0015] In summary, the existing collection schemes for low-voltage distribution networks are difficult to support the business needs of the State Grid Corporation of China for deepening applications and panoramic perception

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