CN108321760A - breaker and its operation method - Google Patents
breaker and its operation method Download PDFInfo
- Publication number
- CN108321760A CN108321760A CN201810154775.2A CN201810154775A CN108321760A CN 108321760 A CN108321760 A CN 108321760A CN 201810154775 A CN201810154775 A CN 201810154775A CN 108321760 A CN108321760 A CN 108321760A
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- China
- Prior art keywords
- impedance value
- breaker
- pulse
- power circuit
- impedance
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
Abstract
The present invention relates to a kind of breakers.The breaker includes control unit, detection unit, actuating unit and switch, the detection unit and the actuating unit are electrically connected with described control unit, the switch under the driving of the actuating unit for disconnecting, the detection unit is used to export electric signal to power circuit to measure the impedance value of the power circuit, described control unit is for the impedance value and default impedance value, when the impedance value is greater than or equal to the default impedance value, described control unit controls the actuating unit and connects the switch.The safety of the breaker is higher.The present invention also provides a kind of operation methods of breaker.
Description
Technical field
The present invention relates to a kind of breaker and its operation methods.
Background technology
In the failure of electric system, most of is the failure of transmission line of electricity.Operating experience shows that overhead transmission line failure is big
All it is " instantaneity ".For example, the insulator surface flashover caused by thunder and lightning, big wind-induced short, birds and branch etc.
Object falls caused short circuit etc. on conducting wire, after circuit is disconnected rapidly by relay protection, electric arc, that is, horizontal blanking, and external object
(such as branch, birds) is also burnt up by electric arc and is disappeared.At this point, if the line-breaker of disconnection is closed again, it will be able to extensive
Multiple normal power supply.Therefore, this kind of failure is " transient fault ".In addition to this, also there is " permanent fault ", such as due to line
Failure caused by bar, broken string, insulator breakdown or damage etc. is fallen on road, and after circuit is disconnected, they are still existing.This
When, even if in power turn-on, since failure still remains, circuit will be also again off because of relay protection, thus cannot be extensive
Multiple normal power supply.
Since the failure on transmission line of electricity has the above property, carry out once closing a floodgate just again after circuit is disconnected
It is possible that greatly improving the reliability of power supply.Being widely used in the power system thus can be automatic after circuit breaker trip
The auto recloser that ground closes a floodgate breaker again.But auto recloser can only according to fixed interval time and time
Number is attempted to close a floodgate, if it is to still remain to cause to close a floodgate to fail that failure is closed a floodgate in trial on circuit, in turn results in breaker damage
It ruins.
Invention content
Based on this, it is necessary to provide a kind of higher breaker of safety and its operation method.
A kind of breaker, including control unit, detection unit, actuating unit and switch, the detection unit and described
Actuating unit is electrically connected with described control unit, and the switch is described for being disconnected under the driving of the actuating unit
Detection unit is used to export electric signal to power circuit to measure the impedance value of the power circuit, described control unit be used for than
The impedance value and default impedance value, when the impedance value is greater than or equal to the default impedance value, described control unit
It controls the actuating unit and connects the switch.
In a wherein embodiment, the electric signal is constant current signal.
In a wherein embodiment, the electric signal is pulse-type current signal, and each pulse signal is believed for square wave
Number.
In a wherein embodiment, the detection unit includes pulse sending module and impedance analysis module, described
Pulse sending module is electrically connected with described control unit with the impedance analysis module, and the pulse sending module is for sending out
The pulse-type current signal, the impedance analysis module is sent to be used to obtain the impedance value of power circuit.
A kind of operation method of breaker, includes the following steps：In the off state to power circuit export electric signal with
Measure the impedance value of the power circuit；Compare the impedance value and default impedance value；And when the impedance value is more than or waits
When default impedance value, the breaker is connected.
In a wherein embodiment, the electric signal is constant current signal.
In a wherein embodiment, the electric signal is pulse-type current signal, and each pulse signal is believed for square wave
Number.
In a wherein embodiment, the breaker includes control unit and detection unit, the detection unit packet
Pulse sending module and impedance analysis module are included, the pulse sending module is single with the control with the impedance analysis module
Member is electrically connected, and the pulse sending module is for sending the pulse-type current signal, and the impedance analysis module is for obtaining
Take the impedance value of power circuit.
In a wherein embodiment, the impedance value with the step of default impedance value after further include：
When the impedance value is less than default impedance value, continue to export electric signal to power circuit to measure the impedance of the power circuit
Value；And the impedance value and default impedance value.
In a wherein embodiment, the step of connection breaker, includes：It is spaced preset time and connects institute
State breaker.
In off state, due to the detection unit in the breaker can be used for power circuit export electric signal with
The impedance value of the power circuit is measured, described control unit is for the impedance value and default impedance value, when the resistance
When anti-value is greater than or equal to the default impedance value, described control unit controls the actuating unit and connects the switch.Therefore
It can ensure after Failure elimination, the breaker is just connected, to avoid pacifying caused by the combined floodgate when obstacle is not eliminated
Full hidden danger improves the security performance of the breaker, and can know that the obstacle disappears in time by the detection unit
The information removed connects the breaker in time.
Description of the drawings
Fig. 1 is the module diagram of the breaker of an embodiment.
Fig. 2 is the step flow chart of the operation method of the breaker of an embodiment.
Fig. 3 is the box module map of the breaker of another embodiment.
Specific implementation mode
It invents for the ease of understanding, invention is described more fully below with reference to relevant drawings.It is provided in attached drawing
The better embodiment of invention.But invention can be realized in many different forms, however it is not limited to described herein
Embodiment.On the contrary, the purpose of providing these embodiments is that making to understand the disclosure of invention more thorough and comprehensive.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement for illustrative purposes only, are not offered as being unique embodiment.
Unless otherwise defined, the skill of all of technologies and scientific terms used here by the article and the technical field for belonging to invention
The normally understood meaning of art personnel is identical.Term used herein is intended merely to the purpose of description specific embodiment,
It is not intended to limit invention.Term " and or " used herein includes the arbitrary of one or more relevant Listed Items
And all combination.
The present invention relates to a kind of breakers.The breaker includes control unit, detection unit, actuating unit and opens
It closes.For example, the detection unit and the actuating unit are electrically connected with described control unit, the switch is for described
It is disconnected under the driving of actuating unit.For example, the detection unit is used to export electric signal to power circuit to measure the electric power
The impedance value of circuit.For example, described control unit is for the impedance value and default impedance value.For example, working as the impedance
When value is greater than or equal to the default impedance value, described control unit controls the actuating unit and connects the switch.
Referring to Fig. 1, a kind of breaker 100, including control unit 20, detection unit 30, actuating unit 40 and switch
50, the detection unit 30 and the actuating unit 40 are electrically connected with described control unit 20, and the switch 50 is used for
It is disconnected under the driving of the actuating unit 40, the detection unit 30 is used to export electric signal to power circuit to measure the electricity
The impedance value on line of force road, described control unit 20 is for the impedance value and default impedance value, when the impedance value is more than
Or when equal to the default impedance value, described control unit 20 controls the actuating unit 40 and connects the switch 50.
In off state, since the detection unit 30 in the breaker 100 can be used for exporting electricity to power circuit
For signal to measure the impedance value of the power circuit, described control unit 20 is used for the impedance value and default impedance value,
When the impedance value is greater than or equal to the default impedance value, described control unit 20 controls the actuating unit 40 and connects institute
State switch 50.Therefore can ensure after Failure elimination, the breaker 100 is just connected, to avoid when obstacle is not eliminated
Combined floodgate caused by security risk, improve the security performance of the breaker 100, and can be with by the detection unit 30
The information that the obstacle is eliminated is known in time, connects the breaker 100 in time.
For example, for the ease of detecting whether the failure on the power circuit is eliminated, the electric signal is constant electric current
Signal.The electric signal is pulse-type current signal, and each pulse signal is square-wave signal.The detection unit 30 includes pulse
Sending module 33 and impedance analysis module 35, the pulse sending module 33 and the impedance analysis module 35 with the control
Unit 20 is electrically connected, and the pulse sending module 33 is for sending the pulse-type current signal, the impedance analysis module
35 impedance value for obtaining power circuit.By setting the electric signal to pulse-type current signal, so that described
Whether the obstacle that detection unit 30 can be detected relatively easily on current circuit is eliminated.
For example, impedance value refers to the equivalent impedance of a circuit input end.A voltage source U is added on input terminal,
The electric current I of input terminal is measured, then input impedance value is exactly U/I.If output end is imagined as the both ends of a resistance, this electricity
The resistance value of resistance is exactly impedance.Constant electric current is sent in output end after 100 separating brake of breaker.When test electric current passes through load,
The both ends of load generate voltage.It can be with the impedance value of test circuit by formula R=U/I.For example, the breaker 100 has
Detection function, the present invention provide a kind of miniature circuit breaker 100 of impedance detection function, are sent out in output end timing after failure separating brake
The detection waveform of a string of safety is sent, the line impedance of test output terminal is used for.If detecting the too low so breaker of line impedance
100 will not automatic closing, line impedance restores after normal a period of time breaker 100 by automatic closing after failure is cancelled.
Referring to Fig. 2, a kind of operation method of breaker 100, includes the following steps：
In step S101, electric signal is exported to measure the impedance of the power circuit to power circuit in the off state
Value；
In step S102, the impedance value and default impedance value；And
In step S103, when the impedance value is greater than or equal to default impedance value, the breaker 100 is connected.
In off state, since the detection unit 30 in the breaker 100 can be used for exporting electricity to power circuit
For signal to measure the impedance value of the power circuit, described control unit 20 is used for the impedance value and default impedance value,
When the impedance value is greater than or equal to the default impedance value, described control unit 20 controls the actuating unit 40 and connects institute
State switch 50.Therefore can ensure after Failure elimination, the breaker 100 is just connected, to avoid when obstacle is not eliminated
Combined floodgate caused by security risk, improve the security performance of the breaker 100, and can be with by the detection unit 30
The information that the obstacle is eliminated is known in time, connects the breaker 100 in time
For example, for the ease of safely connecting the breaker 100, the electric signal is constant current signal.
The electric signal is pulse-type current signal, and each pulse signal is square-wave signal.The breaker 100 includes control unit 20
With detection unit 30, the detection unit 30 includes pulse sending module 33 and impedance analysis module 35, and the pulse sends mould
Block 33 is electrically connected with described control unit 20 with the impedance analysis module 35, and the pulse sending module 33 is for sending
The pulse-type current signal, the impedance analysis module 35 are used to obtain the impedance value of power circuit.The resistance
Anti- value with the step of default impedance value after further include：When the impedance value is less than default impedance value, continue to power circuit
Electric signal is exported to measure the impedance value of the power circuit；And the impedance value and default impedance value.The connection
The step of breaker 100 includes：It is spaced preset time and connects the breaker 100.By when being spaced preset connection
Between after connect the breaker 100, so as to just connect the breaker 100, Jin Erti after ensuring that obstacle is thoroughly eliminated
The high security performance of the breaker 100.
Referring to Fig. 3, for example, in one embodiment, described control unit 20 is CPU (Central Processing
Unit, central processing unit), the actuating unit 40 is electronics running part, can pass through inductance, electricity to be commonly used in the art
The electromagnetic induction power that structures generate such as hold the structure that drives.The pulse sending module 33 can be that pulse sends system, institute
It can be impedance analysis system to state impedance analysis module 35.The detection unit 30 can also include current detecting part, described
Current detecting part is for the electric current in detection switch 50 and by current signal transfer to CPU.
Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Embodiment described above only expresses the several embodiments of invention, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, under the premise of not departing from inventive concept, various modifications and improvements can be made, these belong to the protection model of invention
It encloses.Therefore, the protection domain of patent of invention should be determined by the appended claims.
Claims (10)
1. a kind of breaker, which is characterized in that including control unit, detection unit, actuating unit and switch, the detection is single
The first and described actuating unit is electrically connected with described control unit, and the switch under the driving of the actuating unit for breaking
It opens, the detection unit is used to export electric signal to power circuit to measure the impedance value of the power circuit, and the control is single
Member is described when the impedance value is greater than or equal to the default impedance value for the impedance value and default impedance value
Control unit controls the actuating unit and connects the switch.
2. breaker as described in claim 1, which is characterized in that the electric signal is constant current signal.
3. breaker as described in claim 1, which is characterized in that the electric signal is pulse-type current signal, each pulse
Signal is square-wave signal.
4. breaker as claimed in claim 3, which is characterized in that the detection unit includes pulse sending module and impedance point
Module is analysed, the pulse sending module is electrically connected with described control unit with the impedance analysis module, the pulse hair
Module is sent to be used to obtain the impedance value of power circuit for sending the pulse-type current signal, the impedance analysis module.
5. a kind of operation method of breaker, which is characterized in that include the following steps：
Electric signal is exported to measure the impedance value of the power circuit to power circuit in the off state；
Compare the impedance value and default impedance value；And
When the impedance value is greater than or equal to default impedance value, the breaker is connected.
6. operation method as claimed in claim 5, which is characterized in that the electric signal is constant current signal.
7. operation method as claimed in claim 5, which is characterized in that the electric signal is pulse-type current signal, each arteries and veins
It is square-wave signal to rush signal.
8. operation method as claimed in claim 7, which is characterized in that the breaker includes control unit and detection unit,
The detection unit includes pulse sending module and impedance analysis module, the pulse sending module and the impedance analysis module
It is electrically connected with described control unit, the pulse sending module is for sending the pulse-type current signal, the impedance
Analysis module is used to obtain the impedance value of power circuit.
9. operation method as claimed in claim 8, which is characterized in that the step of the impedance value and default impedance value
Further include after rapid：When the impedance value is less than default impedance value, continue described to measure to power circuit output electric signal
The impedance value of power circuit；And the impedance value and default impedance value.
10. operation method as claimed in claim 7, which is characterized in that the step of connection breaker includes：Interval
Preset time connects the breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810154775.2A CN108321760A (en) | 2018-02-23 | 2018-02-23 | breaker and its operation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810154775.2A CN108321760A (en) | 2018-02-23 | 2018-02-23 | breaker and its operation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108321760A true CN108321760A (en) | 2018-07-24 |
Family
ID=62900762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810154775.2A Pending CN108321760A (en) | 2018-02-23 | 2018-02-23 | breaker and its operation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108321760A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117590223A (en) * | 2024-01-18 | 2024-02-23 | 南京飞腾电子科技有限公司 | Online monitoring system and method for circuit breaker |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102077433A (en) * | 2008-06-25 | 2011-05-25 | Abb研究有限公司 | Circuit breaker with improved re-closing functionality |
| CN103972853A (en) * | 2013-02-05 | 2014-08-06 | 施耐德电器工业公司 | Safety protection device and safety protection method |
| CN205067606U (en) * | 2015-10-27 | 2016-03-02 | 国网安徽省电力公司检修公司 | High tension transmission line impedance measuring circuit |
-
2018
- 2018-02-23 CN CN201810154775.2A patent/CN108321760A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102077433A (en) * | 2008-06-25 | 2011-05-25 | Abb研究有限公司 | Circuit breaker with improved re-closing functionality |
| CN103972853A (en) * | 2013-02-05 | 2014-08-06 | 施耐德电器工业公司 | Safety protection device and safety protection method |
| CN205067606U (en) * | 2015-10-27 | 2016-03-02 | 国网安徽省电力公司检修公司 | High tension transmission line impedance measuring circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117590223A (en) * | 2024-01-18 | 2024-02-23 | 南京飞腾电子科技有限公司 | Online monitoring system and method for circuit breaker |
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| PB01 | Publication | ||
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Application publication date: 20180724 |