CN206759164U - A kind of intelligent electric energy detection and protection device - Google Patents
A kind of intelligent electric energy detection and protection device Download PDFInfo
- Publication number
- CN206759164U CN206759164U CN201720430045.1U CN201720430045U CN206759164U CN 206759164 U CN206759164 U CN 206759164U CN 201720430045 U CN201720430045 U CN 201720430045U CN 206759164 U CN206759164 U CN 206759164U
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- China
- Prior art keywords
- circuit
- information acquisition
- intelligent
- acquisition circuit
- electric energy
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Classifications
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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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Abstract
The utility model discloses a kind of intelligent electric energy detection and protection device, and in particular to electric energy detection technical field.The intelligent electric energy detection and protection device,Including control centre and multiple intelligent breakers,Carried out data transmission between multiple intelligent breakers by Zigbee communication,The data message of intelligent breaker converges to Zigbee communication node,Carried out data transmission between Zigbee communication node and control centre by serial communication,Include single-chip microcomputer inside each intelligent breaker,Zero sequence current sensor,Leak electricity information acquisition circuit and quality of power supply information acquisition circuit,Electric leakage information acquisition circuit and quality of power supply information acquisition circuit input single-chip microcomputer after the electric signal that zero sequence current sensor gathers is handled,Electric leakage information acquisition circuit includes the amplification filter-rectifier and A/D converter being sequentially connected,Quality of power supply information acquisition circuit includes the voltage/current sample circuit being sequentially connected,Modulate circuit and ic for energy metering.
Description
Technical field
It the utility model is related to electric energy detection technical field, and in particular to a kind of intelligent electric energy detection and protection device.
Background technology
Electric energy is widely used in daily life and industrial and agricultural production, controls the lifeblood of modern economy, has and holds
It is easy to control, be easy to transmit, the characteristics of small and utilization ratio is high polluted in transmission/consumption process.With Chinese national economy
Continue to develop, electric energy application is further extensive, and resulting electrical fire and tactile electric leakage accident also happen occasionally, and serious threat arrives
The safety of life and property of the country and people.Therefore, leakage protection system is improved, reduces leakage fire and electric leakage thing
Therefore generation, there is important engineering significance.
Power network and electrical equipment in operation, because the normal leakage current of power network can become with the increase and decrease of environment and equipment
Change, the electric leakage action protector of fixed action threshold value can not meet actual demand.
Utility model content
The purpose of this utility model is to be directed to above-mentioned deficiency, it is proposed that a kind of quickly to be realized pair by intelligent breaker
The abnormal conditions such as electric leakage, overload automatically power off the intelligent electric energy detection and protection device of processing.
The utility model specifically adopts the following technical scheme that：
A kind of intelligent electric energy detection and protection device, including control centre and multiple intelligent breakers, multiple intelligence open circuits
Being carried out data transmission between device by Zigbee communication, the data message of intelligent breaker converges to Zigbee communication node,
Carried out data transmission between Zigbee communication node and control centre by serial communication, included inside each intelligent breaker single
Piece machine, zero sequence current sensor, electric leakage information acquisition circuit and quality of power supply information acquisition circuit, electric leakage information acquisition circuit and
Quality of power supply information acquisition circuit inputs single-chip microcomputer after the electric signal that zero sequence current sensor gathers is handled, information of leaking electricity
Acquisition Circuit includes the amplification filter-rectifier and A/D converter being sequentially connected, and quality of power supply information acquisition circuit is included successively
Voltage/current sample circuit, modulate circuit and the ic for energy metering of connection, button is connected with the single-chip microcomputer and LCD is shown
Module.
Preferably, the modulate circuit includes signal amplification circuit, signal filter circuit, the signal rectification electricity being sequentially connected
Road and microcontroller A/D sample circuits.
Preferably, the peak ranges of the voltage signal of the modulate circuit output are 0~5V.
Preferably, it is also associated with relay control module on the single-chip microcomputer.
The single-chip microcomputer is that internal ADC is unipolar STC12C5A60S2.
The utility model has the advantages that：
The device can measure the change of each parameters of electric power and ambient temperature and humidity of installation place in real time, can quickly realize pair
The abnormal conditions such as electric leakage, overload carry out automatically powering off processing；
Zigbee has routing function, and data and state can be found optimal path by the device by Zigbee functions
Remote control center end is dealt into, realizes remote monitoring and power quality analysis；
The device automatically adjusts earth leakage protective threshold value, using spy of earth leakage protective inverse time lag according to the situation of change of electric current
Property the earth leakage protective level of optimization between coordinate, reduce the coverage of failure electric leakage action, improve earth leakage protective reliably with having
Effect property.
Brief description of the drawings
Fig. 1 is intelligent electric energy detection and protection device structured flowchart；
Fig. 2 is intelligent breaker internal circuit configuration schematic diagram；
Fig. 3 is modulate circuit schematic diagram；
Fig. 4 is signal filter circuit schematic diagram；
Fig. 5 is signal rectifier circuit schematic diagram.
Embodiment
Specific embodiment of the present utility model is described further with specific embodiment below in conjunction with the accompanying drawings：
Zigbee is the low-power consumption LAN protocol based on IEEE802.15.4 standards.Provided according to international standard,
ZigBee technology is the wireless communication technology of a kind of short distance, low-power consumption, also known as ZigBee protocol.
As shown in Figure 1-2, a kind of intelligent electric energy detection and protection device, including control centre and multiple intelligent breakers,
Carried out data transmission between multiple intelligent breakers by Zigbee communication, the data message of intelligent breaker converges to Zigbee
Communication node, carried out data transmission between Zigbee communication node and control centre by serial communication, each intelligent breaker
Inside includes, single-chip microcomputer, zero sequence current sensor, electric leakage information acquisition circuit and quality of power supply information acquisition circuit, electric leakage letter
Breath Acquisition Circuit and quality of power supply information acquisition circuit input single after the electric signal that zero sequence current sensor gathers is handled
Piece machine, electric leakage information acquisition circuit include the amplification filter-rectifier and A/D converter being sequentially connected, quality of power supply information gathering
Circuit includes the voltage/current sample circuit, modulate circuit and the ic for energy metering that are sequentially connected, be connected with the single-chip microcomputer by
Key and LCD display module.
As shown in figure 3, modulate circuit includes signal amplification circuit, signal filter circuit, the signal rectification electricity being sequentially connected
Road and microcontroller A/D sample circuits.The peak ranges of the voltage signal of modulate circuit output are 0~5V.It is logical in detection conditioning
Voltage signal in road belongs to small voltage signal, is highly prone to the influence of various interference.To measured signal present in power network
Various interference and circuit board on high-frequency noise interference, can on follow-up A/D change caused by influence, improve to weak voltage
The accurate detection of signal, and processing to detection signal and extraction it is particularly important.
Relay control module is also associated with single-chip microcomputer.
As shown in figure 4, the voltage signal in passage is nursed one's health in detection belongs to small voltage signal, various interference are highly prone to
Influence.The high-frequency noise on the various interference of measured signal and circuit board is disturbed present in power network, can be to follow-up A/D
Influence caused by conversion, and then cause the inaccuracy in data processing, ultimately cause the increasing of protector trip operation unreliability
Add.Therefore, one-stage low-pass wave circuit has been added after signal amplification circuit.
Filter circuit is a kind of to make useful frequency signal by suppressing or being greatly attenuated unwanted frequency signal simultaneously
Electronic circuit.It is commonly used in engineering to do signal transacting, data transmission and suppress interference etc..In view of simple, quick, efficient etc.
Factor, what we were considered as in the design is the scheme of analog filtering, and phase current integrated transporting discharging is developed rapidly, by
The active filter circuit of it and R, C composition, have the advantages that without inductance, small volume, in light weight.Further, since integrated transporting discharging
Open-loop voltage gain and input impedance it is very high, output impedance again it is low, form active filter circuit after also there is certain electricity
Pressure amplifies and buffers effect.The place of deficiency is that the bandwidth of integrated transporting discharging is limited so that the work of the active filter circuit of composition
Frequency is difficult to be made very high.Due to being to carry out LPF to 50Hz power frequency components in the design, this deficiency is just avoided.
As shown in figure 5, it is unipolar STC12C5A60S2 that single-chip microcomputer, which is internal ADC,.Due to STC12C5A60S2 micro-controls
ADC is unipolarity inside device processed, so unipolarity conversion must be carried out to AC signal.Conversion is come real by rectification circuit
Design philosophy that is existing, and being sampled according to further channel A/D, rectification circuit is by the way of full-wave rectification.Use semiconductor two
The rectification circuit of pole pipe does not interfere with the precision of rectification typically when processing substantially exceeds the voltage of diode forward pressure drop.But
It is that, when diode drop exceedes the voltage applied, the precision of rectified signal will be affected.Because diode is in small-signal
When show as it is non-linear so that rectified waveform produces distortion in small-signal part, and when input signal is less than dead zone voltage,
Diode does not turn on simultaneously, therefore commutation output signal has Severe distortion, causes larger error.Survey during in order to improve small-signal
Accuracy is measured, can be overcome using characteristic caused by the amplification and profound and negative feedbck of integrated operational amplifier due to two poles
Manage the error that non-linear and dead zone voltage is brought.
The voltage signal collected and current signal are carried out the associative operations such as A/D analog-to-digital conversions by the part, and are calculated
The related datas such as voltage, electric current, active power, reactive power, apparent energy and the power factor of external circuit.Then, by electricity
The related datas such as pressure, electric current, active power, reactive power, apparent energy and power factor are transferred to microcontroller.The circuit
Difficult point is to realize the accurate measurement to electric energy parameters and the debugging to each component of circuit, to realize the essence to signal
Really collection and measurement.
The major function that smart circuit breaker is realized is exactly to exceed the residual current of current gear in residual current value
Working value, and trigger relay separating brake controls the excision of faulty line after the arrival of corresponding delay time.Control
Executing agency of the part as action, its effect is very crucial, and the reliability that it works also determines residual current operated protective device work
The reliability of work.
Certainly, it is to be also not limited to the example above to limitation of the present utility model, the utility model that described above, which is not,
The variations, modifications, additions or substitutions that those skilled in the art are made in essential scope of the present utility model, also should
Belong to the scope of protection of the utility model.
Claims (5)
1. a kind of intelligent electric energy detection and protection device, it is characterised in that multiple including control centre and multiple intelligent breakers
Carried out data transmission between intelligent breaker by Zigbee communication, the data message of intelligent breaker converges to Zigbee communication
Node, carried out data transmission between Zigbee communication node and control centre by serial communication, inside each intelligent breaker
Including single-chip microcomputer, zero sequence current sensor, electric leakage information acquisition circuit and quality of power supply information acquisition circuit, information gathering of leaking electricity
Circuit and quality of power supply information acquisition circuit input single-chip microcomputer after the electric signal that zero sequence current sensor gathers is handled, leakage
Power information Acquisition Circuit includes the amplification filter-rectifier and A/D converter being sequentially connected, quality of power supply information acquisition circuit bag
Voltage/current sample circuit, modulate circuit and the ic for energy metering being sequentially connected are included, button is connected with single-chip microcomputer and LCD shows
Show module.
2. a kind of intelligent electric energy detection and protection device as claimed in claim 1, it is characterised in that the modulate circuit includes
Signal amplification circuit, signal filter circuit, signal rectifier circuit and the microcontroller A/D sample circuits being sequentially connected.
3. a kind of intelligent electric energy detection and protection device as claimed in claim 2, it is characterised in that the modulate circuit output
The peak ranges of voltage signal be 0~5V.
4. a kind of intelligent electric energy detection and protection device as claimed in claim 1, it is characterised in that also connect on the single-chip microcomputer
It is connected to relay control module.
5. a kind of intelligent electric energy detection and protection device as claimed in claim 1, it is characterised in that the single-chip microcomputer is inside
ADC is unipolar STC12C5A60S2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720430045.1U CN206759164U (en) | 2017-04-24 | 2017-04-24 | A kind of intelligent electric energy detection and protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720430045.1U CN206759164U (en) | 2017-04-24 | 2017-04-24 | A kind of intelligent electric energy detection and protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206759164U true CN206759164U (en) | 2017-12-15 |
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ID=60615228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720430045.1U Expired - Fee Related CN206759164U (en) | 2017-04-24 | 2017-04-24 | A kind of intelligent electric energy detection and protection device |
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| Country | Link |
|---|---|
| CN (1) | CN206759164U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108132426A (en) * | 2018-02-13 | 2018-06-08 | 国网江苏省电力有限公司无锡供电分公司 | Current transformer circuit supervision fail Alarm Detector |
| CN110783900A (en) * | 2019-10-14 | 2020-02-11 | 广州供电局有限公司 | Passive protection device and monitoring module and monitoring method thereof |
| CN111650413A (en) * | 2020-04-14 | 2020-09-11 | 江苏三口井信息科技有限公司 | Metering and protecting system and method of intelligent miniature circuit breaker |
-
2017
- 2017-04-24 CN CN201720430045.1U patent/CN206759164U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108132426A (en) * | 2018-02-13 | 2018-06-08 | 国网江苏省电力有限公司无锡供电分公司 | Current transformer circuit supervision fail Alarm Detector |
| CN108132426B (en) * | 2018-02-13 | 2023-10-03 | 国网江苏省电力有限公司无锡供电分公司 | Alarm detector for broken line of current transformer |
| CN110783900A (en) * | 2019-10-14 | 2020-02-11 | 广州供电局有限公司 | Passive protection device and monitoring module and monitoring method thereof |
| CN110783900B (en) * | 2019-10-14 | 2021-11-09 | 广东电网有限责任公司广州供电局 | Passive protection device and monitoring module and monitoring method thereof |
| CN111650413A (en) * | 2020-04-14 | 2020-09-11 | 江苏三口井信息科技有限公司 | Metering and protecting system and method of intelligent miniature circuit breaker |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171215 Termination date: 20180424 |
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| CF01 | Termination of patent right due to non-payment of annual fee |