CN-224218145-U - Distributed acquisition terminal device for low-voltage distribution network

CN224218145UCN 224218145 UCN224218145 UCN 224218145UCN-224218145-U

Abstract

The utility model relates to the technical field of low-voltage distribution networks, and provides a distributed acquisition terminal device for a low-voltage distribution network, which comprises an integrated acquisition unit, a network topology identification unit, a communication unit, a power supply unit and a data processing unit, wherein the integrated acquisition unit is connected with the network topology identification unit; the power supply unit is respectively connected with the network topology identification unit, the communication unit and the data processing unit, one end of the network topology identification unit and one end of the integrated acquisition unit are respectively connected with the low-voltage power distribution network, the other end of the integrated acquisition unit and the other end of the network topology identification unit are respectively connected with the data processing unit, the data processing unit is also connected with the communication unit, and the distributed acquisition terminal device can effectively identify the network topology of the power distribution network.

Inventors

LIU LEI
TIAN CHUNQING
XU PENG
Lin Zhideng
ZHANG SIWEI
GUO HUA
NIU YABING
XU PENG

Assignees

广州南方电力集团科技发展有限公司

Dates

Publication Date: 20260508
Application Date: 20241231

Claims (10)

1. The distributed acquisition terminal device for the low-voltage distribution network is characterized by comprising an integrated acquisition unit, a network topology identification unit, a communication unit, a power supply unit and a data processing unit; The power supply unit is respectively connected with the network topology identification unit, the communication unit and the data processing unit; One end of the network topology identification unit and one end of the integrated acquisition unit are respectively connected with the low-voltage power distribution network, and the other end of the integrated acquisition unit and the other end of the network topology identification unit are respectively connected with the data processing unit; The data processing unit is also connected with the communication unit.
2. The distributed acquisition terminal device for a low-voltage distribution network according to claim 1, wherein the integrated acquisition unit comprises a plurality of voltage sensors, a plurality of current sensors, a voltage acquisition circuit, a current acquisition circuit and a three-phase electric energy metering module; One end of the voltage sensor is connected with the input end of the voltage acquisition circuit, and the other end of the voltage sensor is connected with the low-voltage distribution network; One end of the current sensor is connected with the input end of the current acquisition circuit, and the other end of the current sensor is connected with the low-voltage distribution network; The output ends of the voltage acquisition circuit and the current acquisition circuit are respectively connected with the input end of the three-phase electric energy metering module, and the output end of the three-phase electric energy metering module is connected with the data processing unit.
3. The distributed acquisition terminal device for a low-voltage power distribution network according to claim 1, wherein a characteristic current transmitting circuit and a characteristic current identifying circuit are configured in the network topology identifying unit, a first end of the characteristic current transmitting circuit and a first end of the characteristic current identifying circuit are respectively connected with the data processing unit, a second end of the characteristic current transmitting circuit are respectively connected with the low-voltage power distribution network, and a third end of the characteristic current transmitting circuit and a third end of the characteristic current identifying circuit are respectively connected with the power supply unit.
4. The distributed acquisition terminal device for a low voltage power distribution network according to claim 1, wherein the power supply unit comprises a power supply circuit and a capacitor backup power supply, and the power supply circuit and the capacitor backup power supply are respectively connected with the network topology identification unit, the communication unit and the data processing unit.
5. The distributed acquisition terminal device for a low voltage power distribution network according to claim 1, further comprising a fault identification and detection unit including an inter-phase short circuit fault monitoring module, a current imbalance monitoring module, and a ground fault monitoring module; One end of the interphase short circuit fault monitoring module, one end of the current unbalance monitoring module and one end of the grounding fault monitoring module are respectively connected with the data processing unit, and the other ends of the interphase short circuit fault monitoring module, the current unbalance monitoring module and the grounding fault monitoring module are respectively connected with the power supply unit.
6. The distributed acquisition terminal device for a low voltage power distribution network according to claim 1, wherein the communication unit comprises a three-phase carrier module, a first end of the three-phase carrier module is connected to the data processing unit, a second end receives a signal outside the distributed acquisition terminal device, and a third end is connected to the power supply unit.
7. The distributed acquisition terminal device for a low voltage power distribution network according to claim 6, wherein the communication unit further comprises a 485 circuit, a first end of the 485 circuit is connected with the data processing unit, a second end receives a signal outside the distributed acquisition terminal device, and a third end is connected with the power supply unit.
8. The distributed acquisition terminal device for a low voltage power distribution network according to claim 7, wherein the communication unit further comprises a WIFI module, a first end of the WIFI module is connected to the data processing unit, a second end receives a signal outside the distributed acquisition terminal device, and a third end is connected to the power supply unit.
9. The distributed acquisition terminal device for a low-voltage power distribution network according to claim 1, wherein the connection mode of the integrated acquisition unit and the low-voltage power distribution network is puncture connection.
10. The distributed acquisition terminal device for a low-voltage distribution network according to any one of claims 1 to 9, further comprising a housing, wherein the integrated acquisition unit, the network topology identification unit, the communication unit, the power supply unit, and the data processing unit are all disposed in the housing, and a buckle is disposed on an outer surface of the housing, and the distributed acquisition terminal device is connected to a line of the low-voltage distribution network through the buckle in a clamping manner.

Description

Distributed acquisition terminal device for low-voltage distribution network Technical Field The utility model relates to the technical field of low-voltage power distribution networks, in particular to a distributed acquisition terminal device for a low-voltage power distribution network. Background The distribution network is a power network which receives electric energy from a power transmission network or a regional power plant, distributes the electric energy locally through a power distribution facility or distributes the electric energy to various users step by step through a plurality of branch lines according to voltage, and is generally provided with a main station which is used for monitoring and analyzing the electric energy quality of distribution network equipment in real time. With the rapid development of socioeconomic, the electricity demand from various industries is increasing, and great challenges are brought to power grid enterprises. For a long time, fault type identification means exist in a power distribution room and a low-voltage transformer area, and faults are usually simple tripping treatment, and then operation and maintenance technicians can check reasons on site. Meanwhile, due to the fact that the connection relation of the 'subscriber line transformer' is not clear, particularly the old and useless transformer areas, partial topology cannot be directly obtained at all, manual investigation is needed, the workload is huge, and waste of manpower and material resources is caused, wherein the 'transformer' in the 'subscriber line transformer' refers to a transformer area, and the transformer area transformer is equipment for converting high-voltage electric energy into low-voltage electric energy suitable for users. Each bay has one or more transformers responsible for powering subscribers ‌ of the bay, "line" refers to the distribution line and "subscriber" refers to the subscriber using electricity. The power distribution room has no monitoring and early warning advanced functions such as phase failure, ground fault and the like of the low-voltage transformer area, and cannot realize real-time monitoring and trend early warning of fault outage of the low-voltage transformer area. In summary, the prior art lacks an effective means to monitor the fault condition on the low-voltage distribution line, and cannot identify the fault type, such as a ground fault, a phase failure, etc., and the "subscriber-line-change" connection relationship (network topology of the low-voltage distribution network) of the low-voltage transformer area is unclear, which requires a great deal of manual investigation. Moreover, the faults on the lines cannot be positioned, when the power transmission lines in complicated villages in cities fail, operation and maintenance personnel can hardly arrive at the correct failure place in a short time, and the defects of frequent power failure, low voltage and the like and cause of the lines cannot be known due to the lack of effective means for monitoring the voltage quality of the low-voltage distribution lines. Disclosure of utility model The utility model provides a distributed acquisition terminal device for a low-voltage power distribution network, which can effectively identify the network topology of the power distribution network in order to overcome the defect that the network topology of the power distribution network cannot be effectively identified and faults cannot be identified and positioned in the prior art. In order to solve the technical problems, the technical scheme of the utility model is as follows: The distributed acquisition terminal device for the low-voltage distribution network comprises an integrated acquisition unit, a network topology identification unit, a communication unit, a power supply unit and a data processing unit; The power supply unit is respectively connected with the network topology identification unit, the communication unit and the data processing unit; One end of the network topology identification unit and one end of the integrated acquisition unit are respectively connected with the low-voltage power distribution network, and the other end of the integrated acquisition unit and the other end of the network topology identification unit are respectively connected with the data processing unit; The data processing unit is also connected with the communication unit. Compared with the prior art, the technical scheme of the utility model has the beneficial effects that: The application collects real-time data of branch lines of the low-voltage distribution network through the integrated collection unit, processes the collected data through the data processing unit, receives external signals through the communication unit, distributes the data to the network topology identification unit according to the received signals and actual needs, and identifies the network topology structure of the low-voltage distribution net