CN206788283U - A kind of low-voltage electrical safety monitoring assembly based on power line carrier transmission - Google Patents
A kind of low-voltage electrical safety monitoring assembly based on power line carrier transmission Download PDFInfo
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- CN206788283U CN206788283U CN201720734506.4U CN201720734506U CN206788283U CN 206788283 U CN206788283 U CN 206788283U CN 201720734506 U CN201720734506 U CN 201720734506U CN 206788283 U CN206788283 U CN 206788283U
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Abstract
It the utility model is related to a kind of low-voltage electrical safety monitoring assembly based on power line carrier transmission, safety monitoring for low-voltage electric system, the device includes the monitoring terminal of each section of low-voltage circuit of monitoring, the concentrator being connected with the signal output part of monitoring terminal, the remote supervisory station being connected with the signal output part of concentrator, concentrator includes wireless RF module, power line carrier module, concentrator carries out signal with monitoring terminal by wireless RF module and is connected, concentrator carries out signal with remote supervisory station by power line carrier module and is connected, monitoring terminal monitors the operation conditions of each section of circuit, and monitoring information is transferred to concentrator, concentrator is passed the information on to remote supervisory station by power line carrier module and support with original power line, it is that the real-time monitoring of each section of circuit can be achieved without rewiring.
Description
Technical field
It the utility model is related to electrical safety monitoring device, especially a kind of low-voltage electrical based on power line carrier transmission
Safety monitoring assembly.
Background technology
With expanding economy, the increase of power consumption, the phenomenon that security incident occurs in low-voltage electric system happens occasionally, greatly
It is due to electrical equipment and circuit long-play in the case of more, causes temperature liter after the exceptions such as short circuit, overload, electric leakage occur
Height, again less than on-call maintenance, ignite combustibles around, causes the major accident such as fire or even blast, jeopardizes production and life
Property safety, society and economic heavy losses are caused to life and production, therefore, preventing the generation of security incident then turns into low
Voltage electrical system reliability it is basic.
In recent years, domestic and international enterprise is pre- using being carried out by monitoring leakage electric current and power connection temperature to electric fault
It is alert；Or by installing leakage current or protection device for arc faults to electric switch and equipment, it is timely when electric fault occurs
Action, avoids the sprawling of accident.Product in aforesaid way is mostly installed near switch cubicle or chopper switch, some independent fortune
OK, monitoring parameters are single, it is impossible to realize area monitoring；Some then connects into system by bus, the low-voltage electrical system run
System needs to lay communication bus again and could used.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of low-voltage electrical peace based on power line carrier transmission
Full monitoring device, failure can be monitored without rewiring, realize the low-voltage electrical safe operation in monitored area.
The technical solution adopted in the utility model is：A kind of low-voltage electrical safety monitoring dress based on power line carrier transmission
Put, for the safety monitoring of low-voltage electric system, it is critical that monitoring terminal of the device including each section of low-voltage circuit of monitoring,
The concentrator being connected with the signal output part of monitoring terminal, the remote supervisory station being connected with the signal output part of concentrator, it is described
Concentrator includes wireless RF module, power line carrier module, and concentrator carries out signal with monitoring terminal by wireless RF module and is connected,
Concentrator carries out signal with remote supervisory station by power line carrier module and is connected.
Preferably, described monitoring terminal includes current transformer, Leakage Current transformer, voltage transformer, temperature biography
Sensor, Current Voltage collecting unit, central processing unit, signal output part, the Leakage Current transformer of described current transformer
Signal input part respectively with Current Voltage collecting unit of signal output part, the signal output part of voltage transformer be connected, institute
The signal output part for the Current Voltage collecting unit stated, the signal output part of the temperature sensor signal with central processing unit respectively
Receiving terminal connects, and the signal output part of central processing unit and the signal receiving end of concentrator connect.
Preferably, described concentrator includes at least one sub- concentrator, and sub- concentrator connects successively along signal transmission direction
Connect.
The beneficial effects of the utility model are：The temperature of electrical node, circuit to low-voltage circuit, load current, electric leakage
The operation informations such as stream, fault electric arc carry out effective security evaluation and fault diagnosis, realize that real-time online collects data record, carry
High power supply reliability；The supply line that the data of collection have control, have levels, can determine each section；These status datas
It is sent to long-range prison station to be analyzed, confirmed, overhaul efficiency can be greatly improved with rapid evaluation electrical defect or fault section.
Wireless RF communication module is relied on, the information safe for operation of the low-voltage circuit electrical node in Centralized Monitoring region, and pass through electric power
Carrier module transmits data, solves existing low-voltage electrical and monitors deficiency existing for product, reduces the problem of rewiring, pole
Big saves resource, improves operational efficiency；Improve low-voltage electrical fault detection efficiency and early warning is ageing.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is theory structure schematic diagram of the present utility model.
In accompanying drawing, 1, monitoring terminal, 2, concentrator, 3, remote supervisory station, 4, current transformer, 5, Leakage Current mutual inductance
Device, 6, temperature sensor, 7, voltage x current collecting unit, 8, central processing unit, 9, wireless RF module, 10, power line carrier module,
11st, voltage transformer.
Embodiment
The utility model is described further with reference to Figure of description.
A kind of low-voltage electrical safety monitoring assembly based on power line carrier transmission is the utility model is related to, for low tension
The safety monitoring of gas system, it is important to, the device includes the monitoring terminal 1 of each section of low-voltage circuit of monitoring, the letter with monitoring terminal 1
The concentrator 2 of number output end connection, the remote supervisory station 3 being connected with the signal output part of concentrator 2, the concentrator 2 include
Wireless RF module 9, power line carrier module 10, concentrator 2 carry out signal with monitoring terminal 1 by wireless RF module 9 and are connected, concentrate
Device 2 relies on existing power line to carry out signal with remote supervisory station 3 and is connected, relies on wireless RF module by power line carrier module 10
9, the information safe for operation of each section of line node in Centralized Monitoring region, and existing electricity is relied on by power line carrier module 10
The line of force transmits data, solves existing low-voltage electrical and monitors deficiency existing for product, reduces the problem of rewiring, greatly
Resource is saved, improves operational efficiency；Improve low-voltage electrical fault detection efficiency and early warning is ageing.
Described monitoring terminal 1 includes current transformer 4, Leakage Current transformer 5, voltage transformer 11, TEMP
Device 6, Current Voltage collecting unit 7, central processing unit 8, the current transformer 4 are arranged on low-voltage circuit switch inlet and outlet side,
Low-voltage circuit live wire is entangled with open-type structure；The leakage current transformer 5 is arranged on low-voltage circuit load-side, uses open-type
Structure collar low-voltage circuit live wire and zero line；The temperature sensor 6 is arranged on low-voltage circuit load-side, is close to paster structure
On each phase voltage circuit live wire surface；Signal output part, the signal of Leakage Current transformer 5 of described current transformer 4 are defeated
Go out end, signal input part of the signal output part of voltage transformer 11 respectively with Current Voltage collecting unit 7 is connected, described electricity
The signal of the signal output part, the signal output part of temperature sensor 6 of voltage acquisition unit 7 respectively with central processing unit 8 is flowed to connect
Receiving end is connected, and the signal output part of central processing unit 8 is connected with the signal receiving end of concentrator 2, can be to low-voltage electrical node, line
The operation informations such as the temperature on road, load current, leakage current, fault electric arc carry out effective security evaluation and fault diagnosis, realize
Real-time online collects data record, improves power supply reliability；The data of collection have control, have levels, can determine each section
Supply line；These status datas are sent to remote supervisory station and are analyzed, confirmed, can be with rapid evaluation electrical defect or failure
Section, greatly improve overhaul efficiency.Central processing unit 8 is arm processor.
Described concentrator 2 includes at least one sub- concentrator, and sub- concentrator is sequentially connected along signal transmission direction, due to
Electric force carrier transmission distance is shorter, realizes the transmission of information when region is wider using multiple sub- concentrators.
The concentrator also includes microprocessor unit, communication interface circuit；The wireless RF module 9 connects microprocessor
The SPI interface of unit；The power line carrier module 10 connects the USART interfaces of microprocessor；The microprocessor other
USART interfaces are connected to communication interface circuit.
The voltage x current collecting unit 11 includes current collection circuit and voltage collection circuit；The current collection circuit
Including current signal input Iin, resistance R1-R5, electric capacity C1, C2 and operational amplifier K；The current signal input Iin
Operational amplifier K inverting input is accessed to through resistance R3；The electric capacity C2 is in parallel with resistance R5 to be followed by operational amplifier K
Inverting input pass through between output end；The in-phase input end of the operational amplifier K is grounded through resistance R4；Operational amplifier
The analog input end AIN1 of K output termination arm processor.
The tension measuring circuit includes resistance R6-R7, voltage transformation module CT；The voltage signal is connected on through resistance R7
Voltage transformation module CT inputs；The resistance R7 is connected between voltage transformation module CT two output ends；The voltage turns
Change the mold the analog input end AIN2 of a block CT output termination arm processor, another output head grounding.
Described current transformer model HFCT100；Described leakage current transformer model HFCT100；It is described
Voltage transformer model EE2010；The model DS1820 of described temperature sensor；Described voltage transformation module CT
Model ZMPT107；Described operational amplifier K2 models LM324；Described arm processor model STM32F373.
The method that low-voltage electrical safety monitoring assembly realizes monitoring, comprises the following steps：
(1) power-up initializing of monitoring terminal 1；
(2) central processing unit in monitoring terminal 1 read respectively temperature data, Leakage Current data, three-phase voltage data,
Three-phase current data；
(3) central processing unit 8 judges whether temperature data exceedes default alarm threshold value；If exceed default warning level
Value, into step (3-1)；Otherwise step (4) is gone to；
(3-1) central processing unit 8 exports overtemperature alarm information and passes to concentrator 2 through wireless RF module 9, then passes through electricity
Power carrier module 10 passes to remote supervisory station 3；
(4) central processing unit 8 judges whether leakage current data exceedes default alarm threshold value；If exceed default alarm
Threshold value, into (4-1)；Otherwise step (5) is gone to；
(4-1) central processing unit 8 exports leakage-current alarm information and passes to concentrator 2 through wireless RF module 9, then passes through electricity
Power carrier module 10 passes to remote supervisory station 3；
(5) current signal of a cycle is chosen from the central processing unit 8 of monitoring terminal 1, electric current is extracted using fft algorithm
Virtual value；
(5-1) judges the whether ultrashort road current limit value of current data；If ultrashort road current limit value, into step (5-
2)；Otherwise step (6) is gone to；
(5-2) chooses voltage data from the delay of the central processing unit 8 of the monitoring terminal 1, judge voltage data whether be
Zero, if so, into step (5-3)；Otherwise step (6) is gone to；
(5-3) described output short-circuit warning message of central processing unit 8 simultaneously passes to concentrator 2 through wireless RF module 9, then leads to
Cross power line carrier module 10 and pass to remote supervisory station 3；
(6) central processing unit 8 judges whether current data overloads current limit value；If the electric current that overloads limits
Value, into step (6-1)；Otherwise step (7) is gone to；
(6-1) central processing unit 8 exports overload warning message and passes to concentrator 2 through wireless RF module 9, then passes through
Power line carrier module 10 passes to remote supervisory station 3；
(7) current data of a cycle is chosen from the central processing unit 8 of the monitoring terminal 1, using wavelet algorithm, carried
Take odd harmonic energy value；
(7-1) judge odd harmonic energy value whether superfault electric arc limit value；If superfault electric arc limit value, into step
Suddenly (7-2)；Otherwise step (2) is gone to；
(7-2) described central processing unit 8 exports fault electric arc warning message and passes to concentrator 2 through wireless RF module 9,
Remote supervisory station 3 is passed to by power line carrier module 10 again；
(7-3) goes to step (2).
Claims (3)
1. a kind of low-voltage electrical safety monitoring assembly based on power line carrier transmission, the safety for low-voltage electric system is supervised
Survey, it is characterised in that：The device includes the monitoring terminal (1) of each section of low-voltage circuit of monitoring, the signal output with monitoring terminal (1)
Hold concentrator (2), the remote supervisory station (3) being connected with the signal output part of concentrator (2) of connection, concentrator (2) bag
Wireless RF module (9), power line carrier module (10), concentrator (2) is included to carry out by wireless RF module (9) and monitoring terminal (1)
Signal connects, and concentrator (2) carries out signal with remote supervisory station (3) by power line carrier module (10) and is connected.
2. a kind of low-voltage electrical safety monitoring assembly based on power line carrier transmission according to claim 1, its feature
It is：Described monitoring terminal (1) includes current transformer (4), Leakage Current transformer (5), voltage transformer (11), temperature
Sensor (6), Current Voltage collecting unit (7), central processing unit (8), the signal output part of described current transformer (4),
The signal output part of Leakage Current transformer (5), the signal output part of voltage transformer (11) gather single with Current Voltage respectively
The signal input part connection of first (7), signal output part, the letter of temperature sensor (6) of described Current Voltage collecting unit (7)
Number signal receiving end of the output end respectively with central processing unit (8) is connected, the signal output part and concentrator of central processing unit (8)
(2) signal receiving end connection.
3. a kind of low-voltage electrical safety monitoring assembly based on power line carrier transmission according to claim 1, its feature
It is：Described concentrator (2) includes at least one sub- concentrator, and sub- concentrator is sequentially connected along signal transmission direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720734506.4U CN206788283U (en) | 2017-06-22 | 2017-06-22 | A kind of low-voltage electrical safety monitoring assembly based on power line carrier transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720734506.4U CN206788283U (en) | 2017-06-22 | 2017-06-22 | A kind of low-voltage electrical safety monitoring assembly based on power line carrier transmission |
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| CN206788283U true CN206788283U (en) | 2017-12-22 |
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| CN201720734506.4U Active CN206788283U (en) | 2017-06-22 | 2017-06-22 | A kind of low-voltage electrical safety monitoring assembly based on power line carrier transmission |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594064A (en) * | 2018-06-27 | 2018-09-28 | 广州华铭电力科技有限公司 | A kind of low pressure protection against electric shock prior-warning device and method |
| CN112928819A (en) * | 2021-01-27 | 2021-06-08 | 深圳市深龙达电器有限公司 | Equipment monitoring method and system based on power line high-speed carrier |
-
2017
- 2017-06-22 CN CN201720734506.4U patent/CN206788283U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594064A (en) * | 2018-06-27 | 2018-09-28 | 广州华铭电力科技有限公司 | A kind of low pressure protection against electric shock prior-warning device and method |
| CN112928819A (en) * | 2021-01-27 | 2021-06-08 | 深圳市深龙达电器有限公司 | Equipment monitoring method and system based on power line high-speed carrier |
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