CN107370128A - A kind of SCM Based power protection system - Google Patents
A kind of SCM Based power protection system Download PDFInfo
- Publication number
- CN107370128A CN107370128A CN201610841028.7A CN201610841028A CN107370128A CN 107370128 A CN107370128 A CN 107370128A CN 201610841028 A CN201610841028 A CN 201610841028A CN 107370128 A CN107370128 A CN 107370128A
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- 238000004891 communication Methods 0.000 claims abstract description 13
- 230000001681 protective effect Effects 0.000 claims abstract description 12
- 238000005516 engineering process Methods 0.000 claims abstract description 11
- 230000003321 amplification Effects 0.000 claims description 11
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 238000002955 isolation Methods 0.000 claims description 9
- 230000003287 optical effect Effects 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000012423 maintenance Methods 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 abstract description 6
- 238000009434 installation Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 2
- 238000012806 monitoring device Methods 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000001629 suppression Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- H02J13/0006—
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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
-
- 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
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of SCM Based power protection system, including controller, protective current signal input module, voltage signal input module, data signal input module, wireless communication module, analog output module and PLC technology output module.The SCM Based power protection system of the present invention provides a kind of multi-functional SCM Based power protection system; the production of Intelligent protection measuring controller and the construction of communication network on-the-spot are simplified, workload of the equipment in links such as production, test, installation, debugging and maintenances is greatly lowered；Overcome because intelligent monitoring device category and quantity are various in current production process, test, installation, debugging, this big problem of maintenance workload.
Description
Technical field
The present invention relates to a kind of protection system, specifically a kind of SCM Based power protection system.
Background technology
In the epoch that current Automation of Electric Systems levels make rapid progress, the automatic makeup applied to power system
Put, system it is more and more, function becomes increasingly complex；Such as：Microcomputer relay relay, Intelligent control apparatus, Intelligent Measure and Control Instrument, temperature
Humidity automatic controller, contact temperature measurement system etc.；This provides powerful for the security of electric power system and its equipment, reliability
Support.But these substantial amounts of equipment cause problems applied to a power switch cabinet simultaneously：First, a variety of dresses
Put and be required for gathering identical signal, such as, microcomputer relay relay, Intelligent control apparatus and Intelligent Measure and Control Instrument, they will
Gather three-phase voltage and current signal, status signal, the algorithm stressed by each of which for switch cubicle provide different measurements,
Monitoring and defencive function, design, production, detection and the workload of maintenance of switch is caused to be multiplied；Secondly as these intelligence
Energy equipment both provides communication interface, so as to Centralized Monitoring, for the communication of these equipment, generally is intended to lay for each kind equipment
One or more communication networks, this make it that site operation workload is huge, and communication system reliability reduces, and Maintenance Difficulty is substantially improved.
The content of the invention
It is an object of the invention to provide a kind of SCM Based power protection system, to solve in above-mentioned background technology
The problem of proposition.
To achieve the above object, the present invention provides following technical scheme：
A kind of SCM Based power protection system, including controller, protective current signal input module, voltage signal
Input module, data signal input module, wireless communication module, analog output module and PLC technology output module, institute
State controller and connect protective current signal input module, measurement current signal discrepancy module, voltage signal input module, number respectively
Word signal input module, Temperature Humidity Sensor, wireless communication module, analog output module, PLC technology output module, report
Alert signal output module, electric-magnetic lock signal output module and alarm relay module, relay protection module are also connected with protecting
Current signal input module, the analog output module are also connected with PLC technology output module；
The relay protection module include microprocessor, decoder, switching value, drive circuit, optical coupling isolation circuit and
Voltage power amplifying circuit, the microprocessor connect controller, decoder, switching value and D/A converting circuit respectively, switch
Amount is also respectively connected with decoder and relay, and decoder is also sequentially connected drive circuit, optical coupling isolation circuit and digital-to-analogue conversion electricity
Road, D/A converting circuit are also respectively connected with low-pass filter circuit 1 and low-pass filter circuit 2, and low-pass filter circuit 1 is also connected with voltage
Power amplification circuit, the low-pass filter circuit 2 are also connected with current power amplifying circuit, voltage power amplifying circuit and electric current work(
Rate amplifying circuit is also respectively connected with relay；
The low-pass filter circuit 1 includes series resonance bandreject filtering module, amplification module, high pass module and low pass mould
Block, series resonance bandreject filtering module include inductance L3, inductance L6, electric capacity C3 and electric capacity C10, amplification module include resistance R3,
Resistance R4, triode VD and electric capacity C11, high pass module, which includes electric capacity C1, inductance L1 and varactor D1, low-pass module, to be included
Electric capacity C2, inductance L2 and varactor D2；
The electric capacity C1 connects inductance L1, grounded inductor L4 and electric capacity C2 respectively, and the inductance L1 other ends connect electric capacity respectively
C5 and electric capacity C6, electric capacity the C5 other end connect the electric capacity C6 other ends, resistance R1 and ground connection varactor D1 negative poles, resistance respectively
The R1 other ends connect ground capacity C11, ground capacity C12, resistance R2 and VT respectively, and the resistance R2 other ends connect respectively
Electric capacity C7, electric capacity C8 and ground connection varactor D2 negative poles, the electric capacity C7 other ends connect the electric capacity C8 other ends and inductance L2 respectively,
The inductance L2 other ends connect the electric capacity C2 other ends, grounded inductor L5 and electric capacity C3 respectively, and the electric capacity C3 other ends connect electric capacity respectively
C10, inductance L6 and inductance L3, inductance L3 other ends connection ground capacity C9, the electric capacity C10 other ends connect inductance L6 respectively
The other end and electric capacity C4, electric capacity C4 other ends connection electric capacity C11, the electric capacity C11 other ends connect resistance R3 and triode VD respectively
Base stage, triode VD colelctor electrodes connect resistance R4 and electric capacity C12, resistance R4 other ends connection power supply U2 positive poles, power supply U2 respectively
Negative pole connects power supply U1 negative poles and triode VD emitter stages and is grounded respectively, and the electric capacity C12 other ends connect output end, described
The electric capacity C1 other ends connect input.
As the further scheme of the present invention：The microprocessor model is TMS320F206.
As the further scheme of the present invention：The decoder model ispLSI1016.
As the further scheme of the present invention：The drive circuit uses chip 74HC244.
As the further scheme of the present invention：The D/A converting circuit uses high-performance analog-digital chip AD669.
As the further scheme of the present invention：The optical coupling isolation circuit uses TLP521-4 photoelectrical couplers.
As further scheme of the invention：The D/A converting circuit is changed using 7 road D/A, wherein the conversion of 4 tunnels is logical
Cross low-pass filter circuit 1 and connect voltage power amplifying circuit, the conversion of 3 tunnels connects current power by low-pass filter circuit 2 and amplified
Circuit.
Compared with prior art, the beneficial effects of the invention are as follows：The SCM Based power protection system of the present invention provides
A kind of multi-functional SCM Based power protection system, simplify production and the local communication net of Intelligent protection measuring controller
The construction of network, workload of the equipment in links such as production, test, installation, debugging and maintenances is greatly lowered；Overcome and work as previous existence
Because intelligent monitoring device category and quantity are various during production, test, installation, debugging, this big problem of maintenance workload.
Brief description of the drawings
Fig. 1 is the circuit structure block diagram of SCM Based power protection system；
Fig. 2 is the schematic block circuit diagram of SCM Based power protection system repeat circuit protection module；
Fig. 3 is the circuit diagram of low-pass filter circuit 1 in SCM Based power protection system.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Refer to Fig. 1~3, in the embodiment of the present invention, a kind of SCM Based power protection system, including controller,
Protective current signal input module, voltage signal input module, data signal input module, wireless communication module, analog quantity are defeated
Go out module and PLC technology output module, the controller connects protective current signal input module, measurement electric current letter respectively
Number come in and go out module, voltage signal input module, data signal input module, Temperature Humidity Sensor, wireless communication module, analog quantity
Output module, PLC technology output module, alarm signal output module, electric-magnetic lock signal output module and alarm relay
Module, relay protection module are also connected with protective current signal input module, and the analog output module is also connected with may be programmed
Control output module；
The relay protection module include microprocessor, decoder, switching value, drive circuit, optical coupling isolation circuit and
Voltage power amplifying circuit, the microprocessor connect controller, decoder, switching value and D/A converting circuit respectively, switch
Amount is also respectively connected with decoder and relay, and decoder is also sequentially connected drive circuit, optical coupling isolation circuit and digital-to-analogue conversion electricity
Road, D/A converting circuit are also respectively connected with low-pass filter circuit 1 and low-pass filter circuit 2, and low-pass filter circuit 1 is also connected with voltage
Power amplification circuit, the low-pass filter circuit 2 are also connected with current power amplifying circuit, voltage power amplifying circuit and electric current work(
Rate amplifying circuit is also respectively connected with relay；
The low-pass filter circuit 1 includes series resonance bandreject filtering module, amplification module, high pass module and low pass mould
Block, series resonance bandreject filtering module include inductance L3, inductance L6, electric capacity C3 and electric capacity C10, amplification module include resistance R3,
Resistance R4, triode VD and electric capacity C11, high pass module, which includes electric capacity C1, inductance L1 and varactor D1, low-pass module, to be included
Electric capacity C2, inductance L2 and varactor D2；
The electric capacity C1 connects inductance L1, grounded inductor L4 and electric capacity C2 respectively, and the inductance L1 other ends connect electric capacity respectively
C5 and electric capacity C6, electric capacity the C5 other end connect the electric capacity C6 other ends, resistance R1 and ground connection varactor D1 negative poles, resistance respectively
The R1 other ends connect ground capacity C11, ground capacity C12, resistance R2 and VT respectively, and the resistance R2 other ends connect respectively
Electric capacity C7, electric capacity C8 and ground connection varactor D2 negative poles, the electric capacity C7 other ends connect the electric capacity C8 other ends and inductance L2 respectively,
The inductance L2 other ends connect the electric capacity C2 other ends, grounded inductor L5 and electric capacity C3 respectively, and the electric capacity C3 other ends connect electric capacity respectively
C10, inductance L6 and inductance L3, inductance L3 other ends connection ground capacity C9, the electric capacity C10 other ends connect inductance L6 respectively
The other end and electric capacity C4, electric capacity C4 other ends connection electric capacity C11, the electric capacity C11 other ends connect resistance R3 and triode VD respectively
Base stage, triode VD colelctor electrodes connect resistance R4 and electric capacity C12, resistance R4 other ends connection power supply U2 positive poles, power supply U2 respectively
Negative pole connects power supply U1 negative poles and triode VD emitter stages and is grounded respectively, and the electric capacity C12 other ends connect output end, described
The electric capacity C1 other ends connect input.
Microprocessor model is TMS320F206.
Decoder model ispLSI1016.
Drive circuit uses chip 74HC244.
D/A converting circuit uses high-performance analog-digital chip AD669.
Optical coupling isolation circuit uses TLP521-4 photoelectrical couplers.
D/A converting circuit is changed using 7 road D/A, is put wherein the conversion of 4 tunnels connects voltage power by low-pass filter circuit 1
Big circuit, the conversion of 3 tunnels connect current power amplifying circuit by low-pass filter circuit 2.
The present invention operation principle be：Referring to Fig. 1, protective current signal input module, voltage signal input module, number
Word signal input module monitors voltage transformer, privacy protection current transformer and state sensing in power supply unit in real time
The signal of device output, electric power system failure is identified and can be in instantaneous trip trouble point, so as to realize pair according to relay protective scheme
The circuit protection of switch cubicle.
Protective current signal input module, voltage signal input module, the voltage transformer in data signal input module,
The signal of special measurement current transformer output is sampled, and is measured and is calculated：Frequency, voltage and current virtual value, it is active
The information such as power, reactive power, phase angle, power factor, each harmonic content, active electrical degree amount, idle electricity.
Analog output module can by large format dynamic simulation drawing in the form of reflect switch cubicle in each breaker and
The conjunction isloation state of disconnecting link, human body processing safety monitoring is carried out in real time, complete mode of operation switching and on the spot divide-shut brake, temperature
Humidity sensor refers to the output signal of the temperature sensor installed by monitoring in real time in switch cubicle and humidity sensor,
Start electric-magnetic lock signal output module if necessary, so as to drive the heater of outside, ventilating fan, so as to realize in switch cubicle certainly
Dynamic temperature humidity regulation.
Referring to Fig. 2, each circuit signal of switching value, and testing result is transmitted to microprocessor, microprocessor pair
Testing result is analyzed and processed, and when relay has problem, problem is fed back to controller by microprocessor, defeated by controller
Go out alarm, when relay has no problem, controller continue through the circuits such as microprocessor, decoder, drive circuit continue to
Relay sends various detection signals.
Referring to Fig. 3, the band-pass form that series resonance bandreject filtering module increases pass filtering module is for band on the right
Steeper bandpass characteristics is obtained, to obtain larger Out-of-band rejection, so as to improve antijamming capability；Transfiguration triode series capacitance
It is in order to reduce tuning sensitivity, to reduce influence of the voltage pulsation to bandpass characteristics；The electric capacity connected with transfiguration triode is used
Two electric capacity parallel connections are to adjust the shape of band logical for convenience, with the amount of redundancy of increase debugging；Series resonance bandstop filter is
In order to suppress image frequency interference, because some image frequency points of VHF frequency ranges just fall in antenna low-pass filter circuit and with resistance
The intermediate zone (position of border picture frequency rate is relevant with the size of the first IF-FRE) of filter circuit, depend merely on low-pass filter circuit suppression
It is not enough to the degree of suppression to image frequency for reaching requirement；Filter circuit increase amplification module is to decay after filtering
Signal amplification, filter circuit increase one-level to ground series resonance bandreject filtering module be in order to increase band logical the right band suppression
System.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.Any reference in claim should not be considered as to the involved claim of limitation.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (7)
1. a kind of SCM Based power protection system, including controller, protective current signal input module, voltage signal are defeated
Enter module, data signal input module, wireless communication module, analog output module and PLC technology output module, it is special
Sign is that the controller connects protective current signal input module respectively, measurement current signal comes in and goes out, and module, voltage signal are defeated
It is defeated to enter module, data signal input module, Temperature Humidity Sensor, wireless communication module, analog output module, PLC technology
Go out module, alarm signal output module, electric-magnetic lock signal output module and alarm relay module, relay protection module is also
Protective current signal input module is connected, the analog output module is also connected with PLC technology output module；
The relay protection module includes microprocessor, decoder, switching value, drive circuit, optical coupling isolation circuit and voltage
Power amplification circuit, the microprocessor connect controller, decoder, switching value and D/A converting circuit respectively, and switching value is also
Connect decoder respectively and relay, decoder are also sequentially connected drive circuit, optical coupling isolation circuit and D/A converting circuit, number
Analog conversion circuit is also respectively connected with low-pass filter circuit 1 and low-pass filter circuit 2, and low-pass filter circuit 1 is also connected with voltage power
Amplifying circuit, the low-pass filter circuit 2 are also connected with current power amplifying circuit, and voltage power amplifying circuit and current power are put
Big circuit is also respectively connected with relay；
The low-pass filter circuit 1 includes series resonance bandreject filtering module, amplification module, high pass module and low-pass module, string
Connection resonance bandreject filtering module includes inductance L3, inductance L6, electric capacity C3 and electric capacity C10, and amplification module includes resistance R3, resistance
R4, triode VD and electric capacity C11, high pass module include electric capacity C1, inductance L1 and varactor D1, and low-pass module includes electric capacity
C2, inductance L2 and varactor D2；
The electric capacity C1 connects inductance L1, grounded inductor L4 and electric capacity C2 respectively, the inductance L1 other ends connect respectively electric capacity C5 and
It is another that electric capacity C6, electric capacity the C5 other end connect the electric capacity C6 other ends, resistance R1 and ground connection varactor D1 negative poles, resistance R1 respectively
One end connects ground capacity C11, ground capacity C12, resistance R2 and VT respectively, and the resistance R2 other ends connect electric capacity respectively
C7, electric capacity C8 and ground connection varactor D2 negative poles, the electric capacity C7 other ends connect the electric capacity C8 other ends and inductance L2, inductance respectively
The L2 other ends connect the electric capacity C2 other ends, grounded inductor L5 and electric capacity C3 respectively, the electric capacity C3 other ends connect respectively electric capacity C10,
Inductance L6 and inductance L3, inductance the L3 other end connect ground capacity C9, and it is another that the electric capacity C10 other ends connect inductance L6 respectively
End and electric capacity C4, electric capacity C4 other ends connection electric capacity C11, the electric capacity C11 other ends connect resistance R3 and triode VD base stages respectively,
Triode VD colelctor electrodes connect resistance R4 and electric capacity C12, resistance R4 other ends connection power supply U2 positive poles, power supply U2 negative poles point respectively
Power supply U1 negative poles and triode VD emitter stages and it Lian Jie not be grounded, the electric capacity C12 other ends connect output end, the electric capacity C1
The other end connects input.
2. SCM Based power protection system according to claim 1, it is characterised in that the microprocessor model
For TMS320F206.
3. SCM Based power protection system according to claim 1, it is characterised in that the decoder model
ispLSI1016。
4. SCM Based power protection system according to claim 1, it is characterised in that the drive circuit uses
Chip 74HC244.
5. SCM Based power protection system according to claim 1, it is characterised in that the D/A converting circuit
Using high-performance analog-digital chip AD669.
6. SCM Based power protection system according to claim 1, it is characterised in that the optical coupling isolation circuit
Using TLP521-4 photoelectrical couplers.
7. SCM Based power protection system according to claim 1, it is characterised in that the D/A converting circuit
Changed using 7 road D/A, wherein the conversion of 4 tunnels connects voltage power amplifying circuit by low-pass filter circuit 1, the conversion of 3 tunnels passes through low
Bandpass filter circuit 2 connects current power amplifying circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610841028.7A CN107370128A (en) | 2016-09-22 | 2016-09-22 | A kind of SCM Based power protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610841028.7A CN107370128A (en) | 2016-09-22 | 2016-09-22 | A kind of SCM Based power protection system |
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| Publication Number | Publication Date |
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| CN107370128A true CN107370128A (en) | 2017-11-21 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610841028.7A Pending CN107370128A (en) | 2016-09-22 | 2016-09-22 | A kind of SCM Based power protection system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066628A (en) * | 2018-09-05 | 2018-12-21 | 南京志卓电子科技有限公司 | It is a kind of according to instruction hardware realization multi-level output current-limiting circuit |
| CN110837237A (en) * | 2019-10-17 | 2020-02-25 | 北京南瑞怡和环保科技有限公司 | Fire collection control device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102364799A (en) * | 2011-11-07 | 2012-02-29 | 四川省电力公司遂宁公司 | Differential protection system for power system substation |
| CN104283197A (en) * | 2014-10-27 | 2015-01-14 | 四川蓝讯宝迩电子科技有限公司 | Relay protection system |
| CN105262062A (en) * | 2015-09-25 | 2016-01-20 | 陈薇 | Power switch cabinet protection system |
-
2016
- 2016-09-22 CN CN201610841028.7A patent/CN107370128A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102364799A (en) * | 2011-11-07 | 2012-02-29 | 四川省电力公司遂宁公司 | Differential protection system for power system substation |
| CN104283197A (en) * | 2014-10-27 | 2015-01-14 | 四川蓝讯宝迩电子科技有限公司 | Relay protection system |
| CN105262062A (en) * | 2015-09-25 | 2016-01-20 | 陈薇 | Power switch cabinet protection system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066628A (en) * | 2018-09-05 | 2018-12-21 | 南京志卓电子科技有限公司 | It is a kind of according to instruction hardware realization multi-level output current-limiting circuit |
| CN110837237A (en) * | 2019-10-17 | 2020-02-25 | 北京南瑞怡和环保科技有限公司 | Fire collection control device |
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Application publication date: 20171121 |