CN215835198U - Domestic 10KV dual-power supply monitoring system based on 485 communication - Google Patents
Domestic 10KV dual-power supply monitoring system based on 485 communication Download PDFInfo
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Abstract
The utility model discloses a 485 communication based domestic 10KV dual-power supply monitoring system, wherein data transmission ports of a first electric meter and a second electric meter are respectively connected with a data acquisition port of a 485 communication slave machine, the 485 communication slave machine is connected with a 485 communication upper computer, the 485 communication upper computer is connected with a single chip microcomputer through an RS485 module, a 4G communication module is connected with the single chip microcomputer, and a power supply unit respectively provides power for the RS485 module, the single chip microcomputer and the 4G communication module. The domestic 10KV dual-power-supply power supply monitoring system based on 485 communication provided by the utility model can reliably monitor the running state of a power supply line in real time, is favorable for stable running of a power grid and is also favorable for improving effective management and control of the line.
Description
Technical Field
The utility model relates to a 485 communication based domestic 10KV dual-power supply monitoring system, and belongs to the technical field of power supply monitoring.
Background
The automation of the power system is a necessary trend of power development in China, the function of a control chip as a core of an automatic device of the power system is irreplaceable, however, with the development of western countries including the United states for limiting high and new technologies in China, measures are taken from fines of individual manufacturers to neck clamping behaviors of numerous manufacturers and products, and the attack is more and more extensive and the measures are more and more severe.
For a long time, core devices are products depending on western enterprises, and once a western country takes a limiting measure, a core lack state becomes a normal state, so that distribution and power utilization end equipment cannot work, and the operation safety, stability and reliability of a power grid are influenced. Therefore, the power distribution end equipment has stronger and stronger requirements on localization appeal, and is struggled to be considerable, manageable and controllable.
The requirements of various industries on power supply reliability are higher and higher, and two power supplies are required to be adopted to ensure the power supply reliability in many occasions such as hospitals, coal mines and the like. At present, two 10KV incoming lines are arranged in a part of power distribution rooms, one incoming line supplies power to the other incoming line for standby, when a main line fails or is overhauled, a standby line is switched, a dual-power standby automatic switching device trips, and a power supply is automatically switched. Because current spare power automatic switching device does not have communication function, consequently the staff can't master the circuit running state operation in real time, and partial dual supply user privately switches the power point more, leads to GIS archives not in time to update, causes line loss positive and negative fluctuation, can't carry out effective management and control.
On the premise of ensuring domestic electronic components, how to realize real-time monitoring on the state of a 10kV dual-power supply line is a technical problem which needs to be solved by technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
The purpose is as follows: in order to overcome the defects in the prior art, the utility model provides a 485 communication-based domestic 10KV dual-power-supply monitoring system which can reliably monitor the running state of a power supply line in real time, is beneficial to stable running of a power grid and is also beneficial to improving effective management and control of the line.
The technical scheme is as follows: in order to solve the technical problems, the technical scheme adopted by the utility model is as follows:
a domestic 10KV dual-power supply monitoring system based on 485 communication comprises: the DATA transmission ports of the first ammeter and the second ammeter are respectively connected with the DATA acquisition port of the 485 communication slave, the communication interface receiving end and the communication interface sending end of the 485 communication slave are respectively connected with the 485 bus, the communication interface receiving end and the communication interface sending end of the 485 communication upper computer input end are respectively connected with the 485 bus, the communication interface receiving end of the 485 communication upper computer output end is connected with the DATA-pin of the RS485 module, the communication interface sending end of the 485 communication upper computer output end is connected with the DATA + pin of the RS485 module, the VCC pin of the RS485 module is connected with the power supply VCC1, the GND pin of the RS485 module is grounded, and the DATA acquisition port of the RS485 module is connected with the ground
The pins and the DE pins are respectively connected with two data ports of the single chip microcomputer, one path of the RO pin of the RS485 module is connected with the input end of a TTL driver, the output end of the TTL driver is connected with an INT port of the single chip microcomputer, the other path of the RO pin is connected with an RXD port of the single chip microcomputer, and a DI pin of the RS485 module is connected with a TXD port of the single chip microcomputer; the single chip microcomputer VDD port is connected with a power supply VCC2, the single chip microcomputer is connected with an oscillation circuit, a data port of the single chip microcomputer is connected with a 4G communication module, a power supply end of the 4G communication module is connected with a power supply VCC3, the power supply VCC1,The power source VCC2 and the power source VCC3 are respectively provided by the output end of the power supply unit.
As an optimal scheme, the data end of the single chip microcomputer is also connected with a watchdog, and the watchdog is used for resetting when the single chip microcomputer system has an error.
As a preferred scheme, the data end of the single chip microcomputer is also connected with an encryption chip, and the encryption chip is used for encrypting the electric meter data sent by the single chip microcomputer.
As a preferred scheme, the data end of the single chip microcomputer is also connected with a maintenance serial port, and the maintenance serial port is used for being connected with the single chip microcomputer system for debugging.
As a preferred scheme, the data end of the single chip microcomputer is also connected with a standby serial port, and the standby serial port is used for backing up the maintenance serial port.
As the preferred scheme, the data end of the single chip microcomputer is also connected with a debugging information printing port, and the debugging information printing port is used for being connected with a printer to print the debugging information of the single chip microcomputer system.
As a preferred scheme, the data end of the single chip microcomputer is further connected with a storage chip, and the storage chip is used for storing the real-time monitoring data of the first electric meter and the second electric meter in the single chip microcomputer system.
Preferably, the TTL driver uses a 7407 chip.
As a preferred scheme, the power supply unit includes an AC/DC module, an output terminal of the AC/DC module is respectively connected to an isolation power input terminal, a first DC/DC module input terminal, and a second DC/DC module input terminal, the isolation power output terminal outputs a power VCC1, the first DC/DC module output terminal outputs a power VCC2, and the second DC/DC module output terminal outputs a power VCC 3.
Preferably, the method further comprises the following steps: the output end of the AC/DC module is also connected with the input end of the first super capacitor, the output end of the first super capacitor is connected with the input end of the power monitoring circuit, the first output end of the power monitoring circuit is respectively connected with the input end of the first DC/DC module and the input end of the second DC/DC module, the second output end of the power monitoring circuit is connected with the input end of the DC/DC boosting module, the output end of the DC/DC boosting module is respectively connected with the input end of the first DC/DC module and the input end of the second DC/DC module, when the output voltage volt value of the power supply monitoring circuit is larger than 3.7V, the output voltage is output by the first output end of the power supply monitoring circuit, when the output voltage volt value is less than 3.7V, the output voltage is output by the second output end of the power supply monitoring circuit.
Has the advantages that: the domestic 10KV dual-power supply monitoring system based on 485 communication can monitor the real-time states of two 10kV power supply lines and report the states to a master station system through wireless communication, can continue to work for more than 3 minutes through a backup power supply after the power supply loses power to ensure that information is reported reliably, can be installed and disassembled without power outage to improve the effective management and control of a power grid management unit on the power grid, can monitor the power supply state of the 10kV dual-power supply lines in real time, and can still maintain normal work to judge and report the power outage state under the condition of power outage; the design scheme of nationwide chemical production devices is adopted, so that the neck clamp has important significance for solving the neck clamp problem, and the product is considerable, manageable and controllable in height.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
Fig. 2 is a schematic structural diagram of the power supply unit of the present invention.
Fig. 3 is a schematic topology diagram of the present invention in application.
Fig. 4 is a block diagram of the signal communication topology of the system of the present invention.
Detailed Description
The present invention will be further described with reference to the following examples.
As shown in fig. 1, a domestic 10KV dual power supply monitoring system based on 485 communication includes: the data transmission ports of the first ammeter and the second ammeter are respectively connected with the data acquisition port of the 485 communication slave machine, the communication interface receiving end and the communication interface sending end of the 485 communication slave machine are respectively connected with the 485 bus, the communication interface receiving end and the communication interface sending end of the 485 communication upper computer input end are respectively connected with the 485 bus, and the 485 bus is connected with the 485 communication upper computer input endThe communication interface receiving end of the output end of the communication upper computer is connected with a DATA-pin of the RS485 module, the communication interface sending end of the output end of the 485 communication upper computer is connected with a DATA + pin of the RS485 module, a VCC pin of the RS485 module is connected with a VCC1, a GND pin of the RS485 module is grounded, and a GND pin of the RS485 module is connected with a power supply
The pins and the DE pins are respectively connected with two data ports of the single chip microcomputer, one path of the RO pin of the RS485 module is connected with the input end of a TTL driver, the output end of the TTL driver is connected with an INT port of the single chip microcomputer, the other path of the RO pin is connected with an RXD port of the single chip microcomputer, and a DI pin of the RS485 module is connected with a TXD port of the single chip microcomputer; singlechip VDD port is connected with power VCC2, and the singlechip is connected with oscillating circuit, and the data port of singlechip is connected with 4G communication module, and 4G communication module's power end is connected with power VCC3, power VCC1, power VCC2, power VCC3 are provided by the electrical unit output respectively.
The data end of the single chip microcomputer is also connected with a watchdog, and the watchdog is used for resetting when the single chip microcomputer system is in error.
The data end of the single chip microcomputer is also connected with an encryption chip, and the encryption chip is used for encrypting the ammeter data sent by the single chip microcomputer.
The data end of the single chip microcomputer is also connected with a maintenance serial port, and the maintenance serial port is used for being connected with the single chip microcomputer system for debugging.
The data end of the single chip microcomputer is also connected with a standby serial port, and the standby serial port is used for backing up the maintenance serial port.
The data end of the single chip microcomputer is also connected with a debugging information printing port, and the debugging information printing port is used for being connected with a printer to print debugging information of the single chip microcomputer system.
The data end of the single chip microcomputer is also connected with a storage chip, and the storage chip is used for storing the real-time monitoring data of the first ammeter and the second ammeter in the single chip microcomputer system.
The TTL driver adopts a 7407 chip.
As shown in fig. 2, the power supply unit includes an AC/DC module, an output terminal of the AC/DC module is connected to an isolation power input terminal, a first DC/DC module input terminal, and a second DC/DC module input terminal, respectively, the isolation power output terminal outputs a power VCC1, the first DC/DC module output terminal outputs a power VCC2, and the second DC/DC module output terminal outputs a power VCC 3.
Further comprising: the output end of the AC/DC module is also connected with the input end of the first super capacitor, the output end of the first super capacitor is connected with the input end of the power monitoring circuit, the first output end of the power monitoring circuit is respectively connected with the input end of the first DC/DC module and the input end of the second DC/DC module, the second output end of the power monitoring circuit is connected with the input end of the DC/DC boosting module, the output end of the DC/DC boosting module is respectively connected with the input end of the first DC/DC module and the input end of the second DC/DC module, when the output voltage volt value of the power supply monitoring circuit is larger than 3.7V, the output voltage is output by the first output end of the power supply monitoring circuit, when the output voltage volt value is less than 3.7V, the output voltage is output by the second output end of the power supply monitoring circuit.
Example 1:
as shown in fig. 3, when the domestic 10KV dual-power supply monitoring system based on 485 communication is used, the first electric meter and the second electric meter are respectively used for monitoring two mutually backup 10KV power supply incoming lines connected with a 10KV transformer in real time, and the output end of the 10KV transformer is a 380V user power supply. In order to ensure that a master end system and a user know the conditions of two 10kv power supply inlet wires in real time, the power supply monitoring system can simultaneously read the current and voltage data of two electric meters through the structure of a 485 communication master and slave machines, and can also respectively read the current and voltage data of the two electric meters through two sets of power supply monitoring systems to perform a dual-system redundancy backup.
As shown in fig. 4, the single chip microcomputer reads current and voltage data of the first electric meter and the second electric meter which are acquired by the 485 communication upper computer through the RS485 module, and uploads the current and voltage data to the master station system through the 4G communication module, and the master station system judges the working states of the two 10kv power inlet wires through the current and voltage data of the first electric meter and the second electric meter, and sends the working states and fault information of the power inlet wires to a user.
Example 2:
the singlechip adopts a domestic Huaxin micro-special SWM1XO series MCU, the singlechip P10 port is connected with a watchdog circuit, the P12 port is connected with a spare serial port, the P14 port is connected with a debugging information printing port circuit, and the P16 port is connected with an RS485 module
The pin, the DE pin of RS485 module is connected to the P17 port, the output of 7407 chip is connected to the INT0 port, the RO pin of RS485 module is connected to the RXD port, the DI pin of RS485 module is connected to the TXD port, the maintenance serial port is connected to the P00 port, the encryption chip is connected to the P02 port, the memory chip is connected to the P07 port, the 4G communication module is connected to the P21 port, the X1 port and the X2 port are connected with the two ends of the crystal oscillator respectively.
The RO pin of the RS485 module is a data receiving end,
the pin is a DATA receiving enabling end, the low level is effective, the DE pin is a DATA sending enabling end, the high level is effective, the DI pin is a DATA sending end, the DATA + pin is connected with a communication interface sending end of the 485 communication upper computer output end, and the DATA-pin is connected with a communication interface receiving end of the 485 communication upper computer output end.
Example 3:
the power supply unit inputs 100-220VAC, alternating current voltage is processed by the AC/DC module and then respectively used as input of an isolation power supply, the first DC/DC module and the second DC/DC module, 5V isolation voltage is output to supply power to the RS485 module after the isolation power supply is processed, 3.3V voltage is output to supply power to the single chip microcomputer after the first DC/DC module is processed, and 3.8V voltage is output to supply power to the 4G communication module after the second DC/DC module is processed. And meanwhile, the output end of the AC/DC module also supplies power to the first super capacitor.
When the power supply unit has no input voltage, the first super capacitor discharges to the power supply monitoring circuit, when the output voltage volt value of the power supply monitoring circuit is larger than 3.7V, the output voltage is output by the first output end of the power supply monitoring circuit, and when the output voltage volt value of the power supply monitoring circuit is smaller than 3.7V, the output voltage is output by the second output end of the power supply monitoring circuit. The power failure information transmission system is used for normal operation of the single chip microcomputer and the 4G communication module for 3 minutes after power failure under the condition of no power, and can ensure that power failure information is reliably transmitted.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the utility model and these are intended to be within the scope of the utility model.
Claims (10)
1. Domestic 10KV dual supply power supply monitoring system based on 485 communication, its characterized in that: the method comprises the following steps: the DATA transmission ports of the first ammeter and the second ammeter are respectively connected with the DATA acquisition port of the 485 communication slave, the communication interface receiving end and the communication interface sending end of the 485 communication slave are respectively connected with the 485 bus, the communication interface receiving end and the communication interface sending end of the 485 communication upper computer input end are respectively connected with the 485 bus, the communication interface receiving end of the 485 communication upper computer output end is connected with the DATA-pin of the RS485 module, the communication interface sending end of the 485 communication upper computer output end is connected with the DATA + pin of the RS485 module, the VCC pin of the RS485 module is connected with the power supply VCC1, the GND pin of the RS485 module is grounded, and the DATA acquisition port of the RS485 module is connected with the ground
The pins and the DE pins are respectively connected with two data ports of the single chip microcomputer, one path of the RO pin of the RS485 module is connected with the input end of a TTL driver, the output end of the TTL driver is connected with an INT port of the single chip microcomputer, the other path of the RO pin is connected with an RXD port of the single chip microcomputer, and a DI pin of the RS485 module is connected with a TXD port of the single chip microcomputer; singlechip VDD port is connected with power VCC2, and the singlechip is connected with oscillating circuit, and the data port of singlechip is connected with 4G communication module, and 4G communication module's power end is connected with power VCC3, power VCC1, power VCC2, power VCC3 are provided by the electrical unit output respectively.
2. The 485 communication based homemade 10KV dual-power supply monitoring system of claim 1, wherein: the data end of the single chip microcomputer is also connected with a watchdog, and the watchdog is used for resetting when the single chip microcomputer system is in error.
3. The 485 communication based homemade 10KV dual-power supply monitoring system of claim 1, wherein: the data end of the single chip microcomputer is also connected with an encryption chip, and the encryption chip is used for encrypting the ammeter data sent by the single chip microcomputer.
4. The 485 communication based homemade 10KV dual-power supply monitoring system of claim 1, wherein: the data end of the single chip microcomputer is also connected with a maintenance serial port, and the maintenance serial port is used for being connected with the single chip microcomputer system for debugging.
5. The 485 communication based homemade 10KV dual-power supply monitoring system of claim 1, wherein: the data end of the single chip microcomputer is also connected with a standby serial port, and the standby serial port is used for backing up the maintenance serial port.
6. The 485 communication based homemade 10KV dual-power supply monitoring system of claim 1, wherein: the data end of the single chip microcomputer is also connected with a debugging information printing port, and the debugging information printing port is used for being connected with a printer to print debugging information of the single chip microcomputer system.
7. The 485 communication based homemade 10KV dual-power supply monitoring system of claim 1, wherein: the data end of the single chip microcomputer is also connected with a storage chip, and the storage chip is used for storing the real-time monitoring data of the first ammeter and the second ammeter in the single chip microcomputer system.
8. The 485 communication based homemade 10KV dual-power supply monitoring system of claim 1, wherein: the TTL driver adopts a 7407 chip.
9. The 485 communication based homemade 10KV dual-power supply monitoring system of claim 1, wherein: the power supply unit comprises an AC/DC module, wherein the output end of the AC/DC module is respectively connected with an isolation power supply input end, a first DC/DC module input end and a second DC/DC module input end, the isolation power supply output end outputs a power supply VCC1, the first DC/DC module output end outputs a power supply VCC2, and the second DC/DC module output end outputs a power supply VCC 3.
10. The 485 communication based homemade 10KV dual power supply monitoring system of claim 9, wherein: further comprising: the output end of the AC/DC module is also connected with the input end of the first super capacitor, the output end of the first super capacitor is connected with the input end of the power monitoring circuit, the first output end of the power monitoring circuit is respectively connected with the input end of the first DC/DC module and the input end of the second DC/DC module, the second output end of the power monitoring circuit is connected with the input end of the DC/DC boosting module, the output end of the DC/DC boosting module is respectively connected with the input end of the first DC/DC module and the input end of the second DC/DC module, when the output voltage volt value of the power supply monitoring circuit is larger than 3.7V, the output voltage is output by the first output end of the power supply monitoring circuit, when the output voltage volt value is less than 3.7V, the output voltage is output by the second output end of the power supply monitoring circuit.
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| CN202121763116.2U CN215835198U (en) | 2021-07-30 | 2021-07-30 | Domestic 10KV dual-power supply monitoring system based on 485 communication |
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| CN202121763116.2U CN215835198U (en) | 2021-07-30 | 2021-07-30 | Domestic 10KV dual-power supply monitoring system based on 485 communication |
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