CN215264793U - Terminal power grid panoramic sensing terminal - Google Patents
Terminal power grid panoramic sensing terminal Download PDFInfo
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- CN215264793U CN215264793U CN202121071631.4U CN202121071631U CN215264793U CN 215264793 U CN215264793 U CN 215264793U CN 202121071631 U CN202121071631 U CN 202121071631U CN 215264793 U CN215264793 U CN 215264793U
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- 238000012545 processing Methods 0.000 claims abstract description 46
- 238000004891 communication Methods 0.000 claims abstract description 13
- 238000004128 high performance liquid chromatography Methods 0.000 claims abstract description 13
- 238000003860 storage Methods 0.000 claims abstract description 13
- 239000003990 capacitor Substances 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 3
- 230000006870 function Effects 0.000 abstract description 7
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- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008447 perception Effects 0.000 description 2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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Abstract
A tail end power grid panoramic sensing terminal comprises a main control processing unit, an alternate collection metering unit, a topology identification sending unit, an HPLC carrier communication module and a micropower wireless module; the main control processing unit is STM32F091VCT6, and the main control processing unit passes through I2C bus and links to each other with the FRAM storage, and the main control processing unit passes through the SPI bus and links to each other with the FLASH storage, and the handing-over adopts the measuring unit to pass through the SPI bus connection main control processing unit, links to each other through I/O mouth line between topology identification sending element and the main control processing unit, and HPLC carrier communication module and micropower wireless module are connected with the main control processing unit through the serial ports respectively. The method solves the defect of resource waste of the old version terminal hardware platform, reduces the cost by 10 percent on the premise of ensuring the functions and the performance, and greatly improves the bidding competitiveness of the product. In addition, the ST series MCU is adopted as the main control processing unit, so that the portability of the terminal embedded software is better, and the software development period of the series type is shortened.
Description
Technical Field
The utility model belongs to the technical field of the smart power grids, concretely relates to terminal electric wire netting panorama perception terminal.
Background
Through the development of the recent 10 years, the smart grid in China basically realizes 'full collection, full coverage and full cost control', and the smart grid has a prototype. From 2017, on the basis of an existing electricity utilization information acquisition system, national grid Jiangsu electricity provides a target for researching and developing a terminal power grid intelligent sensing system, the system depends on big data of an electricity internet of things, on the basis of perfecting a topological relation of distribution transformer in a transformer area, main-end equipment is installed on the side of a distribution transformer, slave-end equipment is installed on a branch box and an electricity meter box, data transmission of the distribution transformer, the branch box and the electricity meter box is realized step by utilizing electric broadband carrier waves, the data such as current and voltage of the distribution transformer, the branch box and a specific customer electric energy meter are obtained by an acquisition system, and the state of the distribution network equipment is sensed in time. The system can also know the impedance change of a terminal power supply line by analyzing the current and voltage change conditions of the branch box and the ammeter box, judge whether the line has the problems of aging, grounding and the like, monitor the state of the low-voltage line on line and provide support for active operation and maintenance troubleshooting of a low-voltage power grid.
With the scale production of the panoramic sensing terminal of the tail end power grid, the software is mature, and the terminal originally adopting the NCU972 hardware platform wastes resources and cost. Therefore, in order to improve enterprise profits, the hardware design of the panoramic sensing terminal of the tail end power grid of the old version must be optimized.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that overcome prior art not enough, provide a terminal electric wire netting panorama perception terminal, under the prerequisite of guaranteeing performance and function, reduced manufacturing and designing cost by a wide margin, realize the anticipated target of cost reduction increase.
The utility model provides a terminal power grid panoramic sensing terminal, which comprises a main control processing unit, an alternate mining metering unit, a topology identification sending unit, an HPLC carrier communication module and a micropower wireless module; the main control processing unit is STM32F091VCT6, and the main control processing unit passes through I2C bus and links to each other with the FRAM storage, and the main control processing unit passes through the SPI bus and links to each other with the FLASH storage, and the handing-over adopts the measuring unit to pass through the SPI bus connection main control processing unit, links to each other through I/O mouth line between topology identification sending element and the main control processing unit, and HPLC carrier communication module and micropower wireless module are connected with the main control processing unit through the serial ports respectively.
As a further technical scheme of the utility model, the main control processing unit passes through I2C bus and links to each other with real-time clock, and real-time clock is RX-8025T.
Further, the switching power supply is 12V/1A output and is divided into two paths after being stabilized by the DC/DC circuit, one path generates a 5.7V stabilized voltage power supply and transmits the voltage power supply to the super capacitor charging and discharging circuit, and the other path generates a 3.3V stabilized voltage power supply through the second DC/DC circuit and transmits the voltage power supply to the main control processing unit.
Further, the FRAM memory model is MB85RC64PNF, and the MB85RC64PNF is an 8KB ferroelectric memory cell; the FLASH storage model is W25Q64JVSS, and the W25Q64JVSS is 8MB data FLASH memory.
Furthermore, the model of the alternate collection metering unit is HT7038, the HT7038 is a three-phase electric energy metering chip, and the main control processing unit acquires data collected by six analog quantity differential collection ports of the chip through the HT 7038.
Further, the HPLC carrier communication module is an external finished product module, and adopts an SC3105F carrier chip; the micro-power wireless module is an FC623NJ module, and the working frequency range is 470 MHz-510 MHz.
The utility model has the advantages of, through the type of reselecting optimizing system of hardware design, solved the drawback of old version terminal hardware platform wasting of resources, under the prerequisite of guaranteeing function, performance, cost reduction 10%, improve the bid competitiveness of product by a wide margin. In addition, the ST series MCU is adopted as the main control processing unit, so that the portability of the terminal embedded software is better, and the software development period of the series type is shortened.
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Fig. 1 is a block diagram illustrating the structure of the present invention.
Detailed Description
Referring to fig. 1, the present embodiment provides a terminal power grid panoramic sensing terminal, including a main control processing unit, an alternate acquisition metering unit, a topology identification sending unit, an HPLC carrier communication module, and a micropower wireless module; the main control processing unit is STM32F091VCT6, and the main control processing unit passes through I2C bus and links to each other with the FRAM storage, and the main control processing unit passes through the SPI bus and links to each other with the FLASH storage, and the handing-over adopts the measuring unit to pass through the SPI bus connection main control processing unit, links to each other through I/O mouth line between topology identification sending element and the main control processing unit, and HPLC carrier communication module and micropower wireless module are connected with the main control processing unit through the serial ports respectively.
The main control processing unit is a center and is connected with each unit and circuit through corresponding bus interfaces.
The main control processing unit adopts a Cortex-M0 core STM32F091VCT6 with low cost and high performance, which is an LQPF100 package and occupies a PCB area which is greatly smaller than NCU 972. The internal FLASH is 256KB, the RAM is 32KB, the operating frequency is 48MHz, and the resources are enough to realize the functions of the power grid panoramic sensing terminal at the tail end.
The periphery of the main control processing unit is provided with SP809EK for uP monitoring to ensure that the terminal is in a reset state when power is on or off and under voltage, the main control processing unit contains a high-level window watchdog function, and the main control processing unit can be reset and restarted automatically when abnormal operation occurs.
An RTC real-time clock circuit is arranged on the periphery of the main control processing unit, and a high-precision RX-8025T chip with temperature compensation is adopted.
The MB85RC64PNF is an 8KB ferroelectric memory cell FRAM, and has the advantages of almost no writing and erasing life, but has higher cost and smaller capacity, so the memory cell is generally used in occasions where small data volume needs to change erasing and writing frequently, and when a terminal runs, a plurality of discrete dynamic data need to be stored in real time, such as power pulses, temporary parameters and the like.
The W25Q64JVSS is an 8MB data flash memory and is used for storing historical data, data of an alternate acquisition curve and the like, and the capacity meets the requirement of the specification on the maximum storage capacity of the terminal.
The main control processing unit expands three paths of RS-485 communication interfaces through the optical coupler and the RS-485 interface chip, and the interfaces are used for the functions of a field electric energy meter, a cascade interface, a maintenance interface and the like.
The main control processing unit is communicated with a multifunctional high-precision three-phase electric energy special metering chip HT7038 to obtain real-time data of three-phase voltage and current collected by a six-circuit analog quantity differential collection port of the chip and data such as power and electric quantity after internal calculation, and meanwhile, the metering chip outputs active and reactive pulses for precision verification.
The terminal obtains a 12V direct current power supply for system work from a mains supply through an AC/DC module, the maximum 1A output of the power supply is obtained, a 5.7V direct current power supply is firstly produced after DC/DC voltage stabilization, and the voltage higher than the actual working voltage by 0.7V is the diode voltage drop in a subsequent super capacitor charging and discharging circuit. The 5.7V power supply is supplied to the main control processing unit and the peripheral circuits for working through another DC/DC voltage stabilization to 3.3V.
The terminal is provided with a super capacitor as a power-down backup power supply, the super capacitor is in a charging state through a current-limiting resistor during normal work and automatically stops after being fully charged, when power failure occurs, the super capacitor discharges to a subsequent load to maintain the work of the system, and the power-exhausted system automatically stops after several minutes.
The HPLC carrier communication module is an external finished product module, and the HPLC carrier chip adopts an SC3105F carrier chip developed by Beijing smart core micro-electronics, is based on Hua Shi platform, is a carrier chip used in a large scale in a national network system, is stable and reliable
The micropower wireless module works in a frequency band of 470 MHz-510 MHz by adopting an FC623NJ module of a friend transmitter, supports frequency space multiplexing and frequency hopping technologies of 66 frequency points in total of 32 working channels and 1 measuring channel, supports ad-hoc networks, and improves the frequency utilization efficiency and the network expansibility, wherein the number of slave nodes of the network is larger than or equal to 255.
Through the re-selection optimization system of the hardware design, the defect of resource waste of the old version terminal hardware platform is overcome, the cost is reduced by 10% on the premise of ensuring the functions and the performance, and the bidding competitiveness of the product is greatly improved. In addition, the ST series MCU is adopted as the main control processing unit, so that the portability of the terminal embedded software is better, and the software development period of the series type is shortened.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration only, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the claims and their equivalents.
Claims (6)
1. A terminal power grid panoramic sensing terminal is characterized by comprising a main control processing unit, an alternate acquisition metering unit, a topology identification sending unit, an HPLC carrier communication module and a micropower wireless module; the main control processing unit is STM32F091VCT6, the main control processing unit is connected with FRAM storage through I2C bus, the main control processing unit is connected with FLASH storage through SPI bus, the alternate collection metering unit is connected with the main control processing unit through SPI bus, the topology identification transmitting unit is connected with the main control processing unit through I/O port line, the HPLC carrier communication module and the micropower wireless module are connected with the main control processing unit through serial ports respectively.
2. The end grid panoramic sensing terminal of claim 1, wherein the master processing unit is connected to a real-time clock through an I2C bus, and the real-time clock is RX-8025T.
3. The terminal power grid panoramic sensing terminal of claim 1, wherein a switching power supply is 12V/1A output, and is divided into two paths after being stabilized by a DC/DC circuit, one path generates a 5.7V stabilized voltage supply and transmits the same to a super capacitor charging and discharging circuit, and the other path generates a 3.3V stabilized voltage supply through a second DC/DC circuit and transmits the same to the main control processing unit.
4. The end grid panoramic sensing terminal of claim 1, wherein the FRAM storage model is MB85RC64PNF, and the MB85RC64PNF is an 8KB ferroelectric storage unit; the FLASH storage model is W25Q64JVSSI, and the W25Q64JVSSI is 8MB data FLASH memory.
5. The terminal power grid panoramic sensing terminal according to claim 1, wherein the type of the alternate collection metering unit is HT7038, the HT7038 is a three-phase electric energy metering chip, and the main control processing unit obtains data collected by six analog differential collection ports of the chip through the HT 7038.
6. The terminal power grid panoramic sensing terminal of claim 1, wherein the HPLC carrier communication module is an external finished module, and the HPLC carrier communication module adopts an SC3105F carrier chip; the micro-power wireless module is an FC623NJ module, and the working frequency range is 470 MHz-510 MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121071631.4U CN215264793U (en) | 2021-05-19 | 2021-05-19 | Terminal power grid panoramic sensing terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121071631.4U CN215264793U (en) | 2021-05-19 | 2021-05-19 | Terminal power grid panoramic sensing terminal |
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| Publication Number | Publication Date |
|---|---|
| CN215264793U true CN215264793U (en) | 2021-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121071631.4U Active CN215264793U (en) | 2021-05-19 | 2021-05-19 | Terminal power grid panoramic sensing terminal |
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| CN (1) | CN215264793U (en) |
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2021
- 2021-05-19 CN CN202121071631.4U patent/CN215264793U/en active Active
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Effective date of registration: 20240204 Granted publication date: 20211221 |