CN110350494A - A kind of direct current protecting method of adjustable protective range - Google Patents
A kind of direct current protecting method of adjustable protective range Download PDFInfo
- Publication number
- CN110350494A CN110350494A CN201910577133.8A CN201910577133A CN110350494A CN 110350494 A CN110350494 A CN 110350494A CN 201910577133 A CN201910577133 A CN 201910577133A CN 110350494 A CN110350494 A CN 110350494A
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- Prior art keywords
- circuit
- comparator
- direct current
- connect
- protecting method
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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
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/268—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for dc systems
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- Emergency Protection Circuit Devices (AREA)
Abstract
A kind of direct current protecting method of adjustable protective range of the present invention; it include: observation circuit, comparator, CPU element, DAC module, switching circuit, input module and display interface; leading portion power supply is connect with switching circuit and observation circuit respectively; observation circuit is connect with comparator, and comparator is connect with switching circuit；Input module is connect with CPU element input terminal, and display interface is connect with CPU element, and DAC module is connect with CPU element output end, and DAC module is connect with comparator；Demand that can be different according to different situations, manual adjustment protection scope, when electric current in circuit or voltage have been more than the protection scope of setting, the output of switching circuit cut-off current.The present invention can adjust protection scope according to different needs, design new circuit without going again, safety is also enhanced while providing convenient.
Description
Technical field
The present invention relates to direct current transportation and relay protection field, more specifically to a kind of adjustable protective range
Direct current protecting method.
Background technique
In recent years, DC transmission system is quickly grown, and to prevent power system accident, is needed in face of many problems.For
Problem produces the protective relaying device using direct current protecting technology.In circuit design, it is often necessary to which different phase is set
Meter, wherein just include experimental verification stage and actual use stage, in Qualify Phase we can allow product run at capacity or
Run to person's excess load, this requires us to be arranged load in power supply circuit can meet the use in each stage simultaneously, and
Also rapidly protect our product that cannot burn out when occurring abnormal, it is most of using fixed electricity on the market at present
The overload protecting circuit of stream, cannot achieve this usage mode, and overload protecting circuit can only be made load ratio by existing technology
It is larger, so the effect for playing protection is not often very well, to fall flat.
Currently existing scheme has the following disadvantages:
1. being substantially fixed current value, each different circuit of load will design the overload protection electricity of different loads
Road, it is very inconvenient；
2. hidden danger is big, if circuit is arranged unreasonable, encounters abnormal leaky or short circuit phenomenon is often burnt
Bad device.
Summary of the invention
The technical problem to be solved in the present invention is that how by using a kind of adjustable protective range direct current protecting side
Method can realize in an overload protecting circuit and adjust different protection scopes, the equipment of different load can be applicable in together
The method of one overload protecting circuit, by artificially to carrying out different settings under different situations to protection scope according to demand,
Improve the deficiency in common circuit design, more flexible convenient, strong applicability, and safety has obtained very big reinforcement.For
The defect of the prior art provides a kind of direct current protecting method of adjustable protective range.
The technical solution adopted by the present invention to solve the technical problems is: the direct current for constructing a kind of adjustable protective range is protected
Maintaining method can be realized in an overload protecting circuit and adjust different protection scopes, when electric current in circuit or voltage are super
When having crossed the protection scope of setting, the output of switching circuit cut-off current, supply current zero realizes the current adjustment of protection
Protection scope is saved, applicability is stronger, and does not have to go again to provide easily same because of the new circuit of the different circuit design of load
When security performance also ensured.
In a kind of direct current protecting method of adjustable protective range of the present invention, a kind of adjustable protective model
The direct current protecting method enclosed, comprising: observation circuit, comparator, CPU element, DAC module, switching circuit, input module and display
Interface；
Leading portion power supply is connect with switching circuit and observation circuit respectively, and observation circuit is connect with comparator, comparator with open
Close circuit connection；
Input module is connect with CPU element input terminal, and display interface is connect with CPU element, and DAC module is defeated with CPU element
Outlet connection, DAC module are connect with comparator.
In a kind of direct current protecting method of adjustable protective range of the invention, observation circuit is for monitoring external circuit
Current signal in circuit.
In a kind of direct current protecting method of adjustable protective range of the invention, monitoring circuit monitors to current signal
Afterwards, current signal is converted into voltage signal, and amplifies voltage signal.
In a kind of direct current protecting method of adjustable protective range of the invention, input module is used for the protection being arranged
Range data inputs CPU element.
In a kind of direct current protecting method of adjustable protective range of the invention, CPU element is by the protection scope of input
Data input DAC module, handle data by DAC module and after level is arranged, and DAC module is by level data input comparator
In.
In a kind of direct current protecting method of adjustable protective range of the invention, observation circuit believes amplified voltage
In number input comparator.
In a kind of direct current protecting method of adjustable protective range of the invention, comparator by the voltage signal of input with
The level data of DAC module input is compared.
In a kind of direct current protecting method of adjustable protective range of the invention, voltage signal is exported higher than DAC module
When level data, export as low level, comparator generation signal input switching circuit, switching circuit closing.
In a kind of direct current protecting method of adjustable protective range of the invention, voltage signal is exported lower than DAC module
When level data, export as high level, comparator generation signal input switching circuit, switching circuit normal power-up.
In a kind of direct current protecting method of adjustable protective range of the invention, display interface is used for real-time display circuit
Middle all data.
According to the present invention of above scheme, the beneficial effect is that, the present invention provides a kind of adjustable protective ranges
Direct current protecting method can be realized in an overload protecting circuit and adjust different protection scopes, and applicability is stronger, can be with people
Work adjusts setting range, designs new circuit without going again, time saving and energy saving also very convenient, circuit structure is simple.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is a kind of circuit structure block diagram of adjustable protective range of the invention.
1, leading portion power supply in the figure；2, observation circuit；3, comparator；4, CPU element；5, input module；6, boundary is shown
Face；7, DAC module；8, switching circuit；9, supply current.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in Figure 1, a kind of direct current protecting method of adjustable protective range, a kind of direct current guarantor of adjustable protective range
Maintaining method, comprising: observation circuit 2, comparator 3, CPU element 4, DAC module 7, switching circuit 8, input module 5 and display interface
6；
Leading portion power supply 1 is connect with switching circuit 8 and observation circuit 2 respectively, and observation circuit 2 is connect with comparator 3, comparator
3 connect with switching circuit 8；
Input module 5 is connect with 4 input terminal of CPU element, and display interface 6 is connect with CPU element 4, and DAC module 7 and CPU are mono-
First 4 output ends connection, DAC module 7 are connect with comparator 3.
Further, observation circuit 2 is used to monitor the current signal in external circuit circuit, real-time monitoring external circuit electricity
Current Voltage variation in road.
Further, after observation circuit 2 monitors current signal, current signal is converted into voltage signal, and certain
Amplify voltage signal in ratio.
Further, the protection scope data input CPU element 4 that input module 5 is used to be arranged, according to a variety of different
Different protection scope data are arranged in situation, more flexible and convenient, if it find that the protection scope that we are arranged is unreasonable, it can
Manually to adjust new setting range again, new circuit is designed without going again.
Further, the protection scope data of input are inputted DAC module 7 by CPU element 4, are handled by DAC module 7
Data and after level is arranged, DAC module 7 will be in level data input comparator 3.
Further, observation circuit 2 will be in amplified voltage signal input comparator 3.
Further, the voltage signal of input is compared by comparator 3 with the level data that DAC module 7 inputs.
Further, because the electric current of power supply is stronger, the voltage of signal can be higher, when voltage signal is higher than DAC module 7
When output level data, export as low level, the generation signal input switching circuit 8 of comparator 3, the closing of switching circuit 8；Work as voltage
When signal is lower than 7 output level data of DAC module, export as high level, the generation signal input switching circuit 8 of comparator 3, switch
8 normal power-up of circuit.
Further, display interface 6 is in real time monitored circuit for all data in real-time display circuit.
Further, if trigger current is protected, waiting can reset again and can be made again after solving the problems, such as
With；If it find that the protection scope that we are arranged is unreasonable, new setting range can be manually adjusted again.
The present invention provides a kind of direct current protecting method of adjustable protective range, can be at one using simple circuit
It is realized in overload protecting circuit and adjusts different protection scope, demand that can be different according to different situations, manual adjustment is protected
Range is protected, when electric current in circuit or voltage have been more than the protection scope of setting, the output of 8 cut-off current of switching circuit is supplied
Electric current is zero, and equipment to be protected needed for us is just protected, and more convenient, applicability is stronger, and does not have to go again
Because of the new circuit of the different circuit design of load, security performance is also ensured while reducing costs.
Although being disclosed by above embodiments to the present invention, scope of protection of the present invention is not limited thereto,
Under conditions of without departing from present inventive concept, deformation, the replacement etc. done to above each component will fall into right of the invention
In claimed range.
Claims (10)
1. a kind of direct current protecting method of adjustable protective range characterized by comprising observation circuit, comparator, CPU are mono-
Member, DAC module, switching circuit, input module and display interface；
External circuit is connect with the switching circuit and the observation circuit respectively, and the observation circuit and the comparator connect
It connects, the comparator is connect with the switching circuit；
The input module is connect with the CPU element input terminal, and the display interface is connect with the CPU element, the DAC
Module is connect with the CPU element output end, and the DAC module is connect with the comparator.
2. a kind of direct current protecting method of adjustable protective range according to claim 1, which is characterized in that the monitoring
Circuit is used to monitor the current signal in external circuit circuit.
3. a kind of direct current protecting method of adjustable protective range according to claim 1, which is characterized in that the monitoring
After circuit monitoring to current signal, the current signal is converted into voltage signal, and amplify the voltage signal.
4. a kind of direct current protecting method of adjustable protective range according to claim 1, which is characterized in that the input
The protection scope data that module is used to be arranged input the CPU element.
5. a kind of direct current protecting method of adjustable protective range according to claim 4, which is characterized in that the CPU
The protection scope data of input are inputted the DAC module by unit, after the DAC module handles data and level is arranged,
The DAC module inputs level data in the comparator.
6. a kind of direct current protecting method of adjustable protective range according to claim 3, which is characterized in that the monitoring
Circuit inputs the amplified voltage signal in the comparator.
7. a kind of direct current protecting method of adjustable protective range according to claim 5 or 6, which is characterized in that described
The voltage signal of input is compared by comparator with the level data that the DAC module inputs.
8. a kind of direct current protecting method of adjustable protective range according to claim 7, which is characterized in that the voltage
When signal is higher than the DAC module output level data, export as low level, the comparator generation signal input switch
Circuit, the switching circuit are closed.
9. a kind of direct current protecting method of adjustable protective range according to claim 7, which is characterized in that the voltage
When signal is lower than the DAC module output level data, export as high level, the comparator generation signal input switch
Circuit, the switching circuit normal power-up.
10. a kind of direct current protecting method of adjustable protective range according to claim 1, which is characterized in that described aobvious
Show interface for all data in real-time display circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910577133.8A CN110350494A (en) | 2019-06-28 | 2019-06-28 | A kind of direct current protecting method of adjustable protective range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910577133.8A CN110350494A (en) | 2019-06-28 | 2019-06-28 | A kind of direct current protecting method of adjustable protective range |
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| Publication Number | Publication Date |
|---|---|
| CN110350494A true CN110350494A (en) | 2019-10-18 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910577133.8A Pending CN110350494A (en) | 2019-06-28 | 2019-06-28 | A kind of direct current protecting method of adjustable protective range |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1674403A (en) * | 2004-03-25 | 2005-09-28 | 美国凹凸微系有限公司 | Over voltage transient controller |
| US20060152872A1 (en) * | 2005-01-11 | 2006-07-13 | Lin Tsun H | Automatic DC power detection device containing circuit protection device for over-voltage and over-current protection |
| CN202353187U (en) * | 2011-12-03 | 2012-07-25 | 南京普天大唐信息电子有限公司 | Short circuit and overcurrent protection unit for storage battery |
| CN103036194A (en) * | 2012-12-12 | 2013-04-10 | 中国石油大学(华东) | Short-circuit protection circuit based on hall current sensor and digital voltage comparator |
| CN103078296A (en) * | 2013-01-25 | 2013-05-01 | 广东志高暖通设备股份有限公司 | Current detection control circuit for direct current bus |
| CN203166461U (en) * | 2013-03-05 | 2013-08-28 | 向智勇 | Control device used for overcurrent or short-circuit protection of electronic cigarette |
| CN206422513U (en) * | 2016-10-20 | 2017-08-18 | 国家电网公司 | A kind of breaker tripping coil real-tune TT ＆ C protection device |
| CN207098585U (en) * | 2017-06-29 | 2018-03-13 | 国网江西省电力公司南昌供电分公司 | The configurable current foldback circuit of threshold value |
| CN108599111A (en) * | 2018-06-14 | 2018-09-28 | 谢红普 | A kind of electric machine controller and its current foldback circuit |
-
2019
- 2019-06-28 CN CN201910577133.8A patent/CN110350494A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1674403A (en) * | 2004-03-25 | 2005-09-28 | 美国凹凸微系有限公司 | Over voltage transient controller |
| US20060152872A1 (en) * | 2005-01-11 | 2006-07-13 | Lin Tsun H | Automatic DC power detection device containing circuit protection device for over-voltage and over-current protection |
| CN202353187U (en) * | 2011-12-03 | 2012-07-25 | 南京普天大唐信息电子有限公司 | Short circuit and overcurrent protection unit for storage battery |
| CN103036194A (en) * | 2012-12-12 | 2013-04-10 | 中国石油大学(华东) | Short-circuit protection circuit based on hall current sensor and digital voltage comparator |
| CN103078296A (en) * | 2013-01-25 | 2013-05-01 | 广东志高暖通设备股份有限公司 | Current detection control circuit for direct current bus |
| CN203166461U (en) * | 2013-03-05 | 2013-08-28 | 向智勇 | Control device used for overcurrent or short-circuit protection of electronic cigarette |
| CN206422513U (en) * | 2016-10-20 | 2017-08-18 | 国家电网公司 | A kind of breaker tripping coil real-tune TT ＆ C protection device |
| CN207098585U (en) * | 2017-06-29 | 2018-03-13 | 国网江西省电力公司南昌供电分公司 | The configurable current foldback circuit of threshold value |
| CN108599111A (en) * | 2018-06-14 | 2018-09-28 | 谢红普 | A kind of electric machine controller and its current foldback circuit |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 518000 the first floor, second floor, third floor, fourth floor and fifth floor of 16 workshops in antuoshan high tech Industrial Park, Shajing street, Bao'an District, Shenzhen City, Guangdong Province Applicant after: Shenzhen Mingxin testing equipment Co., Ltd Address before: Baoan District manhole Street Xinsha road Shenzhen city Guangdong province 518000 security supporting mountain High-tech Industrial Park 16 Applicant before: SHENZHEN MASON TEST EQUIPMENT Co.,Ltd. |
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| CB02 | Change of applicant information | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191018 |
|
| RJ01 | Rejection of invention patent application after publication |