CN109961984A - The time relay and its control method for multi-channel control - Google Patents
The time relay and its control method for multi-channel control Download PDFInfo
- Publication number
- CN109961984A CN109961984A CN201711434767.5A CN201711434767A CN109961984A CN 109961984 A CN109961984 A CN 109961984A CN 201711434767 A CN201711434767 A CN 201711434767A CN 109961984 A CN109961984 A CN 109961984A
- Authority
- CN
- China
- Prior art keywords
- current
- value
- differential
- time point
- current value
- Prior art date
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
- H01H47/18—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for introducing delay in the operation of the relay
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
Present disclose provides a kind of time relays for multi-channel control characterized by comprising current detecting unit, wherein for detecting electric current of each route in multichannel incoming line in multiple time points of a period of time；Computing unit, receives the signal for the electric current that current detecting unit detects, and calculates the signal, obtains input current value, and the input current value is subtracted each other with pre-set current value, obtains current differential；Addition unit carries out additional calculation to the current differential at the multiple time point, obtain current differential and；First comparing unit compares by the current differential and with preset threshold, if the current differential and on the preset threshold, acts the time relay, to control the on-off that the time relay controls each route.
Description
Technical field
This disclosure relates to a kind of relay field more particularly to a kind of time relay and its control for multi-channel control
Method.
Background technique
The time relay functions primarily as one of simple program control performer, when it receives starting
Start timing after signal, the movement that its working contact is opened or closed after timing, so that subsequent circuit be pushed to work.
In general, the delay performance of the time relay is adjustable in the range of design, to facilitate its delay of adjustment
Length of time.
And in the time relay in use, inverse-time overcurrent protection would generally be used.But inverse time in the prior art
The shortcomings that limiting overcurrent protection is more complex for time coordinations.
Summary of the invention
In order to solve the above-mentioned technical problem, present disclose provides a kind of computer management systems.
According to one aspect of the disclosure, a kind of time relay for multi-channel control, comprising:
Current detecting unit, wherein for detecting each route in multichannel incoming line at multiple time points of a period of time
In electric current；
Computing unit, receives the signal for the electric current that current detecting unit detects, and calculates the signal, is inputted
Current value, and the input current value is subtracted each other with pre-set current value, obtain current differential；
Addition unit carries out additional calculation to the current differential at the multiple time point, obtain current differential and；
First comparing unit compares by the current differential and with preset threshold, if the current differential and described pre-
If on threshold value, then acting the time relay, to control the on-off that the time relay controls each route.
In a preferred embodiment of the disclosure, when the electric current at some time point at the multiple time point
When difference is positive value, add operation is carried out to the current differential at some time point.
It further include the second comparing unit, when certain of the multiple time point in a preferred embodiment of the disclosure
When the current differential at one time point is negative value, then the second comparing unit compares input current value and default reset current
Value,
If input current value is greater than default reset current value, the addition unit is by the current differential of negative value and before
The current differential at time point and progress add operation, and acquired value is inputted into the first comparing unit；
If input current value is less than default reset current value, by the current differential at time point before and it is set as zero.
It further include relay resetting control unit, if when input current in a preferred embodiment of the disclosure
Value is less than default reset current value, then by the current differential at time point before and is set as zero, and reset to the relay
Control unit output control signal, to be reset to the time relay.
In a preferred embodiment of the disclosure, which is characterized in that it further include relay trip control unit, if
First comparing unit relatively obtains the current differential and on the preset threshold, then the first comparing unit output control
Signal processed, so that the relay trip control unit is acted, to cut off input current.
In a preferred embodiment of the disclosure, comprising:
Current detecting unit detects electric current of each route in multiple time points of a period of time in multichannel incoming line；
Computing unit receives the signal for the electric current that current detecting unit detects, and calculates the signal, is inputted
Current value, and the input current value is subtracted each other with pre-set current value, obtain current differential；
Addition unit carries out additional calculation to the current differential at the multiple time point, obtain current differential and；
First comparing unit compares by the current differential and with preset threshold, if the current differential and described default
On threshold value, then act the time relay, to control the on-off that the time relay controls each route.
In a preferred embodiment of the disclosure, when the electric current at some time point at the multiple time point
When difference is positive value, add operation is carried out to the current differential at some time point.
It further include the institute when some time point at the multiple time point in a preferred embodiment of the disclosure
State current differential be negative value when, then the second comparing unit compares input current value and default reset current value,
If input current value is greater than default reset current value, the addition unit is by the current differential of negative value and before
The current differential at time point and progress add operation, and acquired value is inputted into the first comparing unit；
If input current value is less than default reset current value, by the current differential at time point before and it is set as zero.
In a preferred embodiment of the disclosure, if further including when input current value is less than default reset current
Value then by the current differential at time point before and is set as zero, and to relay resetting control unit output control signal, from
And the time relay is reset.
In a preferred embodiment of the disclosure, if further including that the first comparing unit relatively obtains the current difference
It is worth and on the preset threshold, then the first comparing unit output controls signal, so that relay trip control unit
It is acted, to cut off input current.
Detailed description of the invention
Attached drawing shows the illustrative embodiments of the disclosure, and it is bright together for explaining the principles of this disclosure,
Which includes these attached drawings to provide further understanding of the disclosure, and attached drawing is included in the description and constitutes this
Part of specification.
Fig. 1 is time relay control principle drawing in accordance with one embodiment of the present disclosure.
Fig. 2 is the schematic diagram of the time relay in accordance with one embodiment of the present disclosure.
Fig. 3 is the schematic diagram according to the time relay of another embodiment of the disclosure.
Specific embodiment
The disclosure is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is only used for explaining related content, rather than the restriction to the disclosure.It also should be noted that in order to just
Part relevant to the disclosure is illustrated only in description, attached drawing.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the disclosure can phase
Mutually combination.The disclosure is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
In the disclosure:
According to one aspect of the disclosure, a kind of time relay for multi-channel control, comprising:
Current detecting unit, wherein for detecting each route in multichannel incoming line at multiple time points of a period of time
In electric current；
Computing unit, receives the signal for the electric current that current detecting unit detects, and calculates the signal, is inputted
Current value, and the input current value is subtracted each other with pre-set current value, obtain current differential；
Addition unit carries out additional calculation to the current differential at the multiple time point, obtain current differential and；
First comparing unit compares by the current differential and with preset threshold, if the current differential and described pre-
If on threshold value, then acting the time relay, to control the on-off that the time relay controls each route.
In a preferred embodiment of the disclosure, when the electric current at some time point at the multiple time point
When difference is positive value, add operation is carried out to the current differential at some time point.
It further include the second comparing unit, when certain of the multiple time point in a preferred embodiment of the disclosure
When the current differential at one time point is negative value, then the second comparing unit compares input current value and default reset current
Value,
If input current value is greater than default reset current value, the addition unit is by the current differential of negative value and before
The current differential at time point and progress add operation, and acquired value is inputted into the first comparing unit；
If input current value is less than default reset current value, by the current differential at time point before and it is set as zero.
It further include relay resetting control unit, if when input current in a preferred embodiment of the disclosure
Value is less than default reset current value, then by the current differential at time point before and is set as zero, and reset to the relay
Control unit output control signal, to be reset to the time relay.
It further include relay trip control unit in a preferred embodiment of the disclosure, if first is relatively more single
Member relatively obtains the current differential and on the preset threshold, then the first comparing unit output controls signal, makes
It obtains the relay trip control unit to be acted, to cut off input current.
In a preferred embodiment of the disclosure, comprising:
Current detecting unit detects electric current of each route in multiple time points of a period of time in multichannel incoming line；
Computing unit receives the signal for the electric current that current detecting unit detects, and calculates the signal, is inputted
Current value, and the input current value is subtracted each other with pre-set current value, obtain current differential；
Addition unit carries out additional calculation to the current differential at the multiple time point, obtain current differential and；
First comparing unit compares by the current differential and with preset threshold, if the current differential and described default
On threshold value, then act the time relay, to control the on-off that the time relay controls each route.
In a preferred embodiment of the disclosure, when the electric current at some time point at the multiple time point
When difference is positive value, add operation is carried out to the current differential at some time point.
It further include the institute when some time point at the multiple time point in a preferred embodiment of the disclosure
State current differential be negative value when, then the second comparing unit compares input current value and default reset current value,
If input current value is greater than default reset current value, the addition unit is by the current differential of negative value and before
The current differential at time point and progress add operation, and acquired value is inputted into the first comparing unit；
If input current value is less than default reset current value, by the current differential at time point before and it is set as zero.
In a preferred embodiment of the disclosure, if further including when input current value is less than default reset current
Value then by the current differential at time point before and is set as zero, and to relay resetting control unit output control signal, from
And the time relay is reset.
In a preferred embodiment of the disclosure, if further including that the first comparing unit relatively obtains the current difference
It is worth and on the preset threshold, then the first comparing unit output controls signal, so that relay trip control unit
It is acted, to cut off input current.
Embodiment of the present disclosure is specifically described with reference to the accompanying drawing.
With reference first to Fig. 1, current detecting part 1 detects the current value in incoming line by mutual inductor 3 etc., will test letter
It number is input to the circuit of the time relay 2, and the time relay controls the switch 4 in incoming line according to current value, from
And control the on-off of incoming line.
Referring to Fig. 2, the time relay may include current detecting unit 10(current detecting part 1).Current detecting unit 10
It can be used for detecting input current value.Such as it can be current transformer.And for detecting multiple times in a period of time
The current value of point, these time points can be spaced 0.1 second etc..
Computing unit 11 is carried out for receiving the signal for the electric current that current detecting unit 10 detects, and to the signal
It calculates, obtains input current value, and the input current value is subtracted each other with pre-set current value, obtain current differential.
Addition unit 12 carries out additional calculation to the current differential at the multiple time point, obtain current differential and；
First comparing unit 13, compares by the current differential and with preset threshold, if the current differential and described
On preset threshold, then act the time relay.
In an embodiment of the disclosure, when the current differential at some time point at the multiple time point
When for positive value, add operation is carried out to the current differential at some time point.
It further include the second comparing unit 16, when the multiple for example, see Fig. 3 in another embodiment of the disclosure
When the current differential at some time point at time point is negative value, then the second comparing unit 16 compares input current value and pre-
If reset current value,
If input current value is greater than default reset current value, the addition unit 12 by the current differential of negative value therewith
The current differential at preceding time point and add operation is carried out, and by acquired value the first comparing unit of input, 1；
If input current value is less than default reset current value, by the current differential at time point before and it is set as zero.
It further include relay resetting control unit 15, if when input current value in an embodiment of the disclosure
Less than default reset current value, then by the current differential at time point before and zero is set as, and reset and control to the relay
The output of unit 15 control signal processed, to be reset to the time relay.
It further include relay trip control unit 14 in an embodiment of the disclosure, if the first comparing unit
13 compare and obtain the current differential and on the preset threshold, then the output of the first comparing unit 13 control signal,
So that the relay trip control unit 14 is acted, to cut off input current.
According to the disclosure specific embodiment, wherein the preset threshold is the given threshold of inverse time-lag protection,
Wherein the given threshold is equal to the product of proportionality coefficient, the pre-set current value and a period of time.To according to the threshold of the setting
Value can carry out inverse time-lag protection control to the time relay.Wherein the numberical range of the proportionality coefficient can be 1 to 1.2,
Phase can be by artificially being set.
According to one aspect of the disclosure, a kind of control method of above-mentioned time relay is additionally provided.
In disclosed method, the input current value in multiple time points of a period of time is obtained first.
Obtained input current value is compared with pre-set current value, obtains current differential.
If current differential is positive value, it is added with the sum of the current differential obtained before, and when by this section
Between the sum of obtained current differential compared with the given threshold of inverse time-lag protection, if should and greater than inverse time-lag protection setting
Threshold value then cuts off input current by control relay.
If the current differential is negative value, input current is compared with default reset current value, if input electricity
Stream is less than default reset current value, then resets the sum of current differential being calculated before, and reset time relay；Such as
Fruit input current is greater than default reset current value, then by the sum of the current differential of negative value and the current differential that is calculated before phase
Add, then the sum of obtained current differential compares with the given threshold of inverse time-lag protection, is protected if should and be greater than the inverse time lag
The given threshold of shield then cuts off input current by control relay.
According to the disclosure specific embodiment, wherein the preset threshold is the given threshold of inverse time-lag protection,
Wherein the given threshold is equal to the product of proportionality coefficient, the pre-set current value and described a period of time.To according to the setting
Threshold value, can to the time relay carry out inverse time-lag protection control.Wherein the numberical range of the proportionality coefficient can for 1 to
1.2, the phase can be by artificially being set.
It will be understood by those of skill in the art that above embodiment is used for the purpose of clearly demonstrating the disclosure, and simultaneously
Non- be defined to the scope of the present disclosure.For those skilled in the art, may be used also on the basis of disclosed above
To make other variations or modification, and these variations or modification are still in the scope of the present disclosure.
Claims (10)
1. a kind of time relay for multi-channel control characterized by comprising
Current detecting unit, wherein for detecting each route in multichannel incoming line at multiple time points of a period of time
In electric current；
Computing unit, receives the signal for the electric current that current detecting unit detects, and calculates the signal, is inputted
Current value, and the input current value is subtracted each other with pre-set current value, obtain current differential；
Addition unit carries out additional calculation to the current differential at the multiple time point, obtain current differential and；
First comparing unit compares by the current differential and with preset threshold, if the current differential and described pre-
If on threshold value, then acting the time relay, to control the on-off that the time relay controls each route.
2. the time relay as described in claim 1, which is characterized in that when some time point at the multiple time point
When the current differential is positive value, add operation is carried out to the current differential at some time point.
3. the time relay as claimed in claim 2, which is characterized in that further include the second comparing unit, when the multiple
Between the current differential at some time point put when being negative value, then the second comparing unit compares input current value and default weight
Current value is set,
If input current value is greater than default reset current value, the addition unit is by the current differential of negative value and before
The current differential at time point and progress add operation, and acquired value is inputted into the first comparing unit；
If input current value is less than default reset current value, by the current differential at time point before and it is set as zero.
4. the time relay as claimed in claim 3, which is characterized in that it further include relay resetting control unit, if when
Input current value is less than default reset current value, then by the current differential at time point before and is set as zero, and to it is described after
Electric appliance resets control unit output control signal, to reset to the time relay.
5. the time relay according to any one of claims 1 to 4, which is characterized in that further include relay open circuit control
Unit, if the first comparing unit relatively obtains the current differential and on the preset threshold, described first compares
Unit output control signal, so that the relay trip control unit is acted, to cut off input current.
6. a kind of control method of the time relay characterized by comprising
Current detecting unit detects electric current of each route in multiple time points of a period of time in multichannel incoming line；
Computing unit receives the signal for the electric current that current detecting unit detects, and calculates the signal, is inputted
Current value, and the input current value is subtracted each other with pre-set current value, obtain current differential；
Addition unit carries out additional calculation to the current differential at the multiple time point, obtain current differential and；
First comparing unit compares by the current differential and with preset threshold, if the current differential and described default
On threshold value, then act the time relay, to control the on-off that the time relay controls each route.
7. method as claimed in claim 6, which is characterized in that when the electricity at some time point at the multiple time point
When stream difference is positive value, add operation is carried out to the current differential at some time point.
8. the method for claim 7, which is characterized in that further include some time point when the multiple time point
When the current differential is negative value, then the second comparing unit compares input current value and default reset current value,
If input current value is greater than default reset current value, the addition unit is by the current differential of negative value and before
The current differential at time point and progress add operation, and acquired value is inputted into the first comparing unit；
If input current value is less than default reset current value, by the current differential at time point before and it is set as zero.
9. method according to claim 8, which is characterized in that if further including when input current value is less than default reset current
Value then by the current differential at time point before and is set as zero, and to relay resetting control unit output control signal, from
And the time relay is reset.
10. the method as described in any one of claim 6 to 9, which is characterized in that if further including that the first comparing unit compares
It obtains the current differential and on the preset threshold, then the first comparing unit output controls signal, so that relay
Device trip control unit is acted, to cut off input current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711434767.5A CN109961984A (en) | 2017-12-26 | 2017-12-26 | The time relay and its control method for multi-channel control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711434767.5A CN109961984A (en) | 2017-12-26 | 2017-12-26 | The time relay and its control method for multi-channel control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109961984A true CN109961984A (en) | 2019-07-02 |
Family
ID=67022364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711434767.5A Pending CN109961984A (en) | 2017-12-26 | 2017-12-26 | The time relay and its control method for multi-channel control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109961984A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108549258A (en) * | 2018-03-23 | 2018-09-18 | 高湍斌 | The time relay and its control method for multi-channel control |
-
2017
- 2017-12-26 CN CN201711434767.5A patent/CN109961984A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108549258A (en) * | 2018-03-23 | 2018-09-18 | 高湍斌 | The time relay and its control method for multi-channel control |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7826184B2 (en) | Series arc fault interrupters and methods | |
| CA2583705C (en) | Dynamic energy threshold calculation for high impedance fault detection | |
| Perez et al. | Optimal computation of distance relays second zone timing in a mixed protection scheme with directional overcurrent relays | |
| US10545184B2 (en) | Directional detection of earth faults in an electrical distribution network | |
| US20180301894A1 (en) | Improvements in or relating to direct current protection schemes | |
| CA2446876A1 (en) | Protection of an electric power transmission network | |
| WO2013036385A8 (en) | Optimized protection coordination of electronic-trip circuit breaker by short circuit current availability monitoring | |
| WO2015143215A1 (en) | Method and apparatus for the protection of dc distribution systems | |
| CN106602521B (en) | Bus sampling value differential protection method based on current transformer linear transform area | |
| CN109961984A (en) | The time relay and its control method for multi-channel control | |
| CN106816855B (en) | A kind of inverse time current protection method | |
| CN111965533A (en) | Residual current calculation method, calculation device, storage medium and detection equipment | |
| CN109961983A (en) | The time relay and its control method | |
| JP2016144297A (en) | Ratio differential relay device | |
| CN108549258A (en) | The time relay and its control method for multi-channel control | |
| TW200401484A (en) | Distance relay apparatus | |
| CN109066671A (en) | A kind of cyclization tune electric control method | |
| CN108681265A (en) | The time relay and its control method | |
| CN103414150A (en) | Inverse time limit protection method | |
| US10938198B2 (en) | Variable window length filter for protective relaying | |
| Hossain et al. | Design and testing of a bus differential protection scheme using partial operating current (POC) algorithm | |
| CN207069573U (en) | Electric bicycle motor delaying time of controller start-up circuit based on temperature negative-feedback | |
| Stojanovic et al. | Table based algorithm for inverse-time overcurrent relay | |
| WO2014094977A1 (en) | A power-based method of out of step detection in electrical power network | |
| Wang et al. | Quantification of transient current signals in the viewpoint of overcurrent relays |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190702 |
|
| WD01 | Invention patent application deemed withdrawn after publication |