CN211321024U - Embedded distribution transformer monitoring and metering device and distribution room terminal - Google Patents

Embedded distribution transformer monitoring and metering device and distribution room terminal Download PDF

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Publication number
CN211321024U
CN211321024U CN201922129617.4U CN201922129617U CN211321024U CN 211321024 U CN211321024 U CN 211321024U CN 201922129617 U CN201922129617 U CN 201922129617U CN 211321024 U CN211321024 U CN 211321024U
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module
monitoring
distribution transformer
metering device
power distribution
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郭华
曹雷
林佳周
袁安超
何家盛
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Guangzhou South Power Group Technology Development Co ltd
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Guangzhou South Power Group Technology Development Co ltd
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Abstract

The utility model provides an embedded distribution transformer monitoring metering device, include: the system comprises a monitoring module, a master control MCU and an LORA module; the monitoring module is used for monitoring the voltage and the current of the outgoing line at the low-voltage side of the distribution transformer; the LORA communication module realizes communication with the branch loop device, and the main control MCU receives voltage and current information of outgoing lines at the low-voltage side of the distribution transformer and state information of a branch switch and a branch circuit. The utility model also provides a power distribution room terminal, which comprises an intelligent power distribution room gateway, and a router, a man-machine interaction module, a remote signaling module, a remote control module, a remote measuring module, an embedded power distribution transformer monitoring and metering device, a direct current acquisition module and a power room environment control and acquisition unit which are connected with the intelligent power distribution room gateway; the utility model discloses the effectual medium and low voltage of having solved has various intelligent terminal in the power distribution room, occupies too much electricity room space, makes the complicated problem of wiring. The defect that the distribution transformer monitoring and metering device can only monitor the state of the main switch of the branch circuit and the electric energy data is overcome.

Description

Embedded distribution transformer monitoring and metering device and distribution room terminal
Technical Field
The utility model relates to a monitoring measurement field, more specifically relates to an embedded distribution transformer monitoring metering device and join in marriage electrical room terminal.
Background
With the development of power distribution and utilization intellectualization, intelligent terminals such as a power distribution automation station terminal, a distribution transformer monitoring and metering terminal, an intelligent power room integrated terminal and a low-voltage power user centralized meter reading system concentrator exist in a medium and low-voltage power distribution room. The intelligent terminals are different in size and are respectively and independently wired and dispersedly arranged in the power room, so that the wiring inside the power distribution room is complex, and the appearance is disordered.
Most of the commonly used distribution transformer terminal local modules adopt common IO and 485 communication to realize remote measurement and remote control of local branch switches, 485 lines need to be arranged for communication with the branch switches, more branches have complex wiring conditions, and in addition, more 485 lines need to be arranged for remotely measuring electric energy data of each branch circuit under each branch switch, so that the problems of difficult maintenance and easy safety are caused.
Various intelligent terminals are arranged in the medium and low voltage power distribution room, and the space of the power distribution room is too much, so that the wiring is complex. Only the state and the electric energy data of the main switch of the branch circuit can be monitored.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an overcome above-mentioned prior art join in marriage and become monitoring metering device can only monitor the state of branch circuit master switch and the defect of electric energy data, provide an embedded joining in marriage and become monitoring metering device and join in marriage electrical room terminal.
The device comprises: the system comprises a monitoring module, a master control MCU and an LORA module; the model of the master control MCU is as follows: NUC 972D.
The monitoring module is used for monitoring the voltage and the current of the outgoing line at the low-voltage side of the distribution transformer; transmitting the collected voltage and current information of the outgoing line at the low-voltage side of the distribution transformer to a master control MCU;
the LORA communication module is used for realizing communication with the branch loop device and acquiring state information of a branch switch and a branch circuit; transmitting the collected state information of the branch switch and the branch circuit to the MCU;
the main control MCU receives voltage and current information of the outgoing line at the low-voltage side of the distribution transformer and state information of the branch switch and the branch circuit, realizes data processing, and then respectively sends data processing results to the background, the ammeter and the branch circuit device.
Preferably, the embedded distribution transformer monitoring and metering device further comprises a clock module, and the clock module is connected with the main control MCU to realize time synchronization between the device and other devices.
Preferably, the embedded distribution transformer monitoring and metering device is further provided with an ethernet interface circuit, and the ethernet interface circuit is connected with the main control MCU and used for realizing communication with the background.
Preferably, the embedded distribution transformer monitoring and metering device is further provided with a USB interface circuit, and the USB interface circuit is connected with the main control MCU and used for local upgrading and maintenance.
Preferably, the embedded distribution transformer monitoring and metering device is further provided with an SPI interface circuit, and the SPI interface circuit is connected with the main control MCU and used for being connected with the monitoring module.
In order to overcome the defects that various intelligent terminals occupy too much electric room space and cause complex wiring in the middle and low voltage distribution rooms, the utility model also provides a distribution room terminal,
the power distribution room terminal includes: the system comprises a router, a human-computer interaction module, an intelligent power distribution room gateway, a remote signaling module, a remote control module, a remote measuring module, an embedded distribution transformer monitoring and metering device, a direct current acquisition module and an electric room environment control and acquisition unit;
the router, the human-computer interaction module, the remote signaling module, the remote control module, the remote measuring module, the embedded distribution transformer monitoring and metering device, the direct current acquisition module and the electric room environmental control and acquisition unit are respectively connected with the intelligent power distribution room gateway;
the power distribution room terminal is connected with the background master station through the router;
the remote signaling module, the remote control module and the remote measuring module are respectively connected with the switch cabinet;
the embedded distribution transformer monitoring and metering device is used for monitoring the current and the voltage of the outgoing line at the low-voltage side of the distribution transformer;
the electric room environment control and acquisition unit is connected with other equipment in the power distribution room, so that the linkage of the power distribution terminal and other devices is realized.
Preferably, the power distribution room terminal is further provided with an encryption module, and the encryption module is connected with the intelligent power distribution room gateway to realize encryption of the power distribution room terminal.
Compared with the prior art, the utility model discloses technical scheme's beneficial effect is: the utility model discloses the effectual medium and low voltage of having solved has various intelligent terminal in the power distribution room, occupies too much electricity room space, makes the complicated problem of wiring. The problem that the distribution transformer monitoring and metering device can only monitor the state of the main switch of the branch circuit and the electric energy data is also solved.
The embedded distribution transformer device is embedded into the intelligent distribution room terminal, so that the installation and wiring difficulty is reduced, the embedded distribution transformer device and other devices are concentrated in one terminal, and the wiring does not need to be dispersed like dispersed intelligent terminals.
The embedded distribution transformer device and other intelligent devices share a set of power supply system, a human-computer interaction interface and a set of uploading channel, compared with a dispersed intelligent terminal, the cost of the device can be effectively reduced, and the multiple intelligent devices and the set of uploading channel also meet the development requirement of the later south network intelligent terminal for large fusion of multiple backgrounds.
The LORA module newly added in the device can conveniently expand the remote measurement and control requirements on the states of a branch circuit switch and a branch circuit switch, a measurement and control device provided with an LORA slave module is added on the branch circuit switch behind the branch switch and the branch circuit switch on the low-voltage side of the transformer, and a distribution transformer acquires state information of each circuit and uploads the state information to a background main station, so that the main station can perform fine line loss and power supply quality analysis according to electric energy data such as electric energy, voltage, current, power factor and the like of each branch circuit.
Drawings
Fig. 1 is a schematic view of an embedded distribution transformer monitoring and metering device according to embodiment 1.
Fig. 2 is a schematic diagram of a power distribution room terminal according to embodiment 2.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;
it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention will be further explained with reference to the accompanying drawings and examples.
Example 1
The embodiment provides an embedded distribution transformer monitoring and metering device, as shown in fig. 1, the device includes: the system comprises a monitoring module, a master control MCU and an LORA module;
the monitoring module is used for monitoring the voltage and the current of the outgoing line at the low-voltage side of the distribution transformer; transmitting the collected voltage and current information of the outgoing line at the low-voltage side of the distribution transformer to a master control MCU;
the LORA communication module is used for realizing communication with the branch loop device and acquiring state information of a branch switch and a branch circuit; transmitting the collected state information of the branch switch and the branch circuit to the MCU;
the main control MCU receives voltage and current information of the outgoing line at the low-voltage side of the distribution transformer and state information of the branch switch and the branch circuit, realizes data processing, and then respectively sends data processing results to the background, the ammeter and the branch circuit device.
The embedded distribution transformer monitoring and metering device further comprises a clock module, and the clock module is connected with the master control MCU to realize the time synchronization of the device and other devices.
The embedded distribution transformer monitoring and metering device is also provided with an Ethernet interface circuit, and the Ethernet interface circuit is connected with the main control MCU and is used for realizing communication with a background.
The embedded distribution transformer monitoring and metering device is also provided with a USB interface circuit, and the USB interface circuit is connected with the main control MCU and used for local upgrading and maintenance.
The embedded distribution transformer monitoring and metering device is also provided with an SPI interface circuit, and the SPI interface circuit is connected with the main control MCU and used for being connected with the monitoring module.
As a specific embodiment, the following describes the present embodiment with reference to practical applications and data:
the present embodiment is specifically configured as follows:
1. the main control MCU adopts an industrial grade 32-bit ARM MCU for data calculation, and communicates with the background, the ammeter and the branch loop device for information processing; the model of the master control MCU is as follows: NUC 972D;
the detection module is a monitor with model number ATT 7022.
2. The UART serial port comprises 3 paths of RS485, 1 path of infrared meter reading function, 1 path of local LORA module communication and 1 path of intelligent terminal uploading management module of the power receiving room.
3. The local wireless LORA module is provided for communication, can stably and reliably communicate with the branch loop device, and acquires state information of the branch switch and the branch circuit. The LORA module has a main chip model of SX 1276/8.
4. And 1 path of I2C is supported to be connected with a real-time clock chip, and the precision of the clock chip is within 0.5 second/day of error.
5. And 1-path Ethernet interface circuit is supported and used for maintenance, background communication and the like.
6. And 1-path USB interface circuit is supported and used for local upgrade and maintenance.
7. And providing a 1-way SPI connection monitoring module to measure the state of the low-voltage side of the transformer.
8. The liquid crystal display is supported, and the state of the transformer can be displayed in real time.
9. A system operating status light is provided.
The embodiment adopts a modular design concept, is embedded into a brand new metal shell structure, and has strong anti-interference capability, high precision and low power consumption;
the device is embedded into an integrated intelligent terminal of a power distribution room, the device and other functional modules share an uploading channel, the uploading channel adopts an independent controller, a safety chip is embedded, bidirectional identity authentication between the terminal and a main station is realized, and the encryption requirement of a power grid is met.
And a local module with an LORA wireless communication mode is added to carry out wireless communication with a local branch loop control device, so that remote control and remote measurement of the branch loop and the shunt switch are realized. Comprises the following parts:
firstly, a measurement function:
(1) electric energy: and monitoring the three-phase active total electric energy and the three-phase reactive total electric energy. Power measurement accuracy (1% In-130% In)0.5S level.
(2) Voltage: the three-phase voltages are monitored. The rated voltage is 220V. Ac voltage input range: 110-308V, and the voltage measurement precision (50-120% Un) is 0.5S level.
(3) Current: and monitoring three-phase current and zero-sequence current, wherein the rated current is 5A. Alternating current input range: 0-10A, and the current measurement precision (1% In-130% In) is 0.5S level.
(4) Power: and monitoring the active power and reactive power of the three phases and the total active power and total reactive power. Power measurement accuracy (1% In-130% In)1.0S level.
Secondly, data processing and storing:
(1) curve data
A. B, C the default data interval is one data per 5 minutes, the minimum interval is 1 minute, the data interval can be set by the main station, and the data of more than 60 days can be stored.
A. B, C total active and reactive power curves, the default data interval is one data every 5 minutes, the minimum interval is 1 minute, the data interval can be set by the main station, and the data of more than 60 days can be stored.
A. B, C each phase power factor, total power factor, zero sequence current, the default data interval is one data every 5 minutes, the minimum interval is 1 minute, the data interval can be set by the main station, and the data of more than 60 days last can be stored.
(2) Daily data:
and 3, storing data of at least two months.
The device has the advantages of recording daily maximum and minimum values and occurrence time of voltage, current, power and power factor, and storing data of at least two months.
Daily current average, data for at least the last two months were stored.
(3) Month data
And storing data of at least 6 months for the three-phase monthly active total electric energy and the reactive total electric energy.
Average monthly current, data for at least the last 6 months were stored.
(4) Event logging and alarm functions
The built-in standby power supply can still upload power failure information to the main station when the branch loops are in power failure, and in addition, the built-in standby power supply also has an alarm function of over-current and current imbalance out-of-limit of each branch loop.
Thirdly, local LORA communication:
the LORA communication is divided into a master module and a slave module based on an advanced LORA wireless communication technology. The master module and the device, and the slave module and the branch loop monitoring device.
And the LORA module and the main control chip of the distribution transformer adopt serial port communication. And LORA communication is adopted between the master module and the slave module, and a LORA communication technology is adopted for star networking.
And the LORA module (gateway) of the distribution transformation device realizes multichannel parallel reception and simultaneously processes multichannel signals when the spread spectrum factors SF are different.
The advantage of this embodiment is that no separate terminal housing is used, and in combination with other intelligent appliances, the telecommunication link and the background communication are shared.
Example 2:
the power distribution room terminal comprises the embedded distribution transformer monitoring and metering device in the embodiment 1. As shown in fig. 2, the power distribution room terminal further includes: the system comprises a router, a human-computer interaction module, an intelligent power distribution room gateway, a remote signaling module, a remote control module, a remote measuring module, a direct current acquisition module and an electric room environment control and acquisition unit;
the router, the human-computer interaction module, the remote signaling module, the remote control module, the remote measuring module, the embedded distribution transformer monitoring and metering device, the direct current acquisition module and the electric room environmental control and acquisition unit are respectively connected with the intelligent power distribution room gateway;
the power distribution room terminal is connected with the background master station through the router;
the remote signaling module, the remote control module and the remote measuring module are respectively connected with the switch cabinet;
the embedded distribution transformer monitoring and metering device is used for monitoring the current and the voltage of the outgoing line at the low-voltage side of the distribution transformer;
the electric room environment control and acquisition unit is connected with other equipment in the power distribution room, so that the linkage of the power distribution terminal and other devices is realized.
The power distribution room terminal is further provided with an encryption module, the encryption module is connected with the intelligent power distribution room gateway, and encryption of the power distribution room terminal is achieved.
The same or similar reference numerals correspond to the same or similar parts;
the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent;
it is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (8)

1. An embedded distribution transformer monitoring and metering device, characterized in that the device comprises: the system comprises a monitoring module, a master control MCU and an LORA module;
the monitoring module is used for monitoring the voltage and the current of the outgoing line at the low-voltage side of the distribution transformer; transmitting the collected voltage and current information of the outgoing line at the low-voltage side of the distribution transformer to a master control MCU;
the LORA communication module is used for realizing communication with the branch loop device and acquiring state information of a branch switch and a branch circuit; transmitting the collected state information of the branch switch and the branch circuit to the MCU;
the main control MCU receives voltage and current information of the outgoing line at the low-voltage side of the distribution transformer and state information of the branch switch and the branch circuit, realizes data processing, and then respectively sends data processing results to the background, the ammeter and the branch circuit device.
2. The embedded distribution transformer monitoring and metering device according to claim 1, further comprising a clock module, wherein the clock module is connected to the main control MCU, so as to realize time synchronization between the embedded distribution transformer monitoring and metering device and other devices.
3. The embedded distribution transformer monitoring and metering device according to claim 2, wherein the embedded distribution transformer monitoring and metering device is further provided with an ethernet interface circuit, and the ethernet interface circuit is connected with the main control MCU and is used for realizing communication with a background.
4. The embedded distribution transformer monitoring and metering device according to claim 3, further comprising a USB interface circuit, wherein the USB interface circuit is connected to the main control MCU for local upgrade and maintenance.
5. The embedded distribution transformer monitoring and metering device according to claim 4, further comprising an SPI interface circuit, wherein the SPI interface circuit is connected to the main control MCU for accessing the monitoring module.
6. The embedded distribution transformer monitoring and metering device of claim 5, wherein the type of the master MCU is: NUC 972D.
7. A distribution room terminal comprising the embedded distribution transformer monitoring and metering device of any one of claims 1-6, wherein the distribution room terminal further comprises: the system comprises a router, a human-computer interaction module, an intelligent power distribution room gateway, a remote signaling module, a remote control module, a remote measuring module, a direct current acquisition module and an electric room environment control and acquisition unit;
the router, the human-computer interaction module, the remote signaling module, the remote control module, the remote measuring module, the embedded distribution transformer monitoring and metering device, the direct current acquisition module and the electric room environmental control and acquisition unit are respectively connected with the intelligent power distribution room gateway;
the power distribution room terminal is connected with the background master station through the router;
the remote signaling module, the remote control module and the remote measuring module are respectively connected with the switch cabinet;
the embedded distribution transformer monitoring and metering device is used for monitoring the current and the voltage of the outgoing line at the low-voltage side of the distribution transformer;
the electric room environment control and acquisition unit is connected with other equipment in the power distribution room, so that the linkage of the power distribution terminal and other devices is realized.
8. The power distribution room terminal according to claim 7, wherein the power distribution room terminal is further provided with an encryption module, and the encryption module is connected with the intelligent power distribution room gateway to encrypt the data of communication between the power distribution room terminal and the background.
CN201922129617.4U 2019-11-29 2019-11-29 Embedded distribution transformer monitoring and metering device and distribution room terminal Active CN211321024U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112737112A (en) * 2020-12-24 2021-04-30 广州南方电力集团科技发展有限公司 Full scene data acquisition system and method for intelligent monitoring terminal of power distribution station area

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112737112A (en) * 2020-12-24 2021-04-30 广州南方电力集团科技发展有限公司 Full scene data acquisition system and method for intelligent monitoring terminal of power distribution station area

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