CN109994340A - A kind of heavy dynamic circuit and its control method - Google Patents
A kind of heavy dynamic circuit and its control method Download PDFInfo
- Publication number
- CN109994340A CN109994340A CN201910217444.3A CN201910217444A CN109994340A CN 109994340 A CN109994340 A CN 109994340A CN 201910217444 A CN201910217444 A CN 201910217444A CN 109994340 A CN109994340 A CN 109994340A
- Authority
- CN
- China
- Prior art keywords
- diode
- threshold
- current
- parallel
- relay
- 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.)
- Granted
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
- H01H47/002—Monitoring or fail-safe circuits
-
- 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
Landscapes
- Relay Circuits (AREA)
Abstract
The present invention provides a kind of heavy dynamic circuit and its control method, wherein moving circuit again includes threshold control unit, voltage limiting unit and contact output unit, and the threshold control unit includes four threshold resistances in parallel being serially connected in the current loop of breaking coil；The voltage limiting unit includes the diode of two groups of reverse parallel connections, and every group of diode includes the diode of two series aiding connections, and the threshold control unit is coupled in parallel in the current loop；The contact output unit includes two relays in parallel, and the contact output unit is also coupled in parallel in the current loop.Implement the present invention, settable actuating of relay threshold value effectively prevent relay misoperation, and voltage is limited when electric current is larger, protective relay, reduces the influence to trip(ping) circuit, provides sensitive reliable again dynamic signal.
Description
Technical field
The present invention relates to power system automation technology field more particularly to a kind of heavy dynamic circuit and its control methods.
Background technique
Power system automation apparatus such as safety and stability control device is to be accurately judged to the tripping of substation interval, needs to use
The criterion of electrical quantity combination switching value, wherein switching value is live killer switch trip signal.Criterion based on trip signal
It is required that signalizing activity is sensitive reliable, although equipment component can obtain trip signal by equipment such as relay protections, the signal is not
The actual working state that can reflect circuit breaker trip coil completely, has some limitations.In addition traditional breaker protection
Device although exportable trip signal, but negligible amounts, is unable to satisfy actual demand, it is also necessary to the individual weight moving cell of configuration.
Being moved there are two types of methods again for trip signal is realized at present: 1) being carried out by the trip signal to protection device for circuit breaker
It moves again, realizes quantitative requirement, such mode is due to increasing primary circuit, significantly the disadvantage is that increasing delay, nothing
Method meets the more demanding occasion of part quick-action；2) increase intermediate current type relay, Ci Zhongfang directly in trip(ping) circuit
Case is more demanding to current relay, and improper use has overheat, burns the risk of relay, brings security risk.
Summary of the invention
Technical problem to be solved by the present invention lies in provide a kind of heavy dynamic circuit and its control method, to meet tripping
The requirement of signal sensitivity reliability, and sufficient amount of contact point signal is provided simultaneously.
In order to solve the above technical problem, the present invention provides a kind of heavy dynamic circuits, including threshold control unit, voltage to limit
Unit and contact output unit,
The threshold control unit includes four threshold resistances in parallel being serially connected in the current loop of breaking coil；
The voltage limiting unit includes the diode of two groups of reverse parallel connections, and every group of diode includes two poles of two series aiding connections
Pipe, the threshold control unit are coupled in parallel in the current loop；
The contact output unit includes two relays in parallel, and the contact output unit is also coupled in parallel to the electric current
In circuit.
Wherein, the threshold resistance is power resistor, and rated power is at least 3W.
Wherein, first group of diode includes the first diode and the second diode of series aiding connection, and first diode is just
Pole is connected with the electric current electrode input end of current loop, the electric current negative input phase of the cathode and current loop of the second diode
Even, second group of diode includes the third diode and the 4th diode of series aiding connection, and the cathode and electric current of third diode return
The electric current electrode input end on road is connected, and the anode of the 4th diode is connected with the electric current negative input of current loop.
Wherein, diode is rectifier diode, positive to be limited within 1.5V with backward voltage.
The present invention also provides a kind of control methods of heavy dynamic circuit, comprising the following steps:
It realizes under different nominal current conditions by adjusting the threshold resistance resistance value of threshold control unit, is set when input current reaches
When determining threshold value, relay tip closure output；Or identical volume is realized by adjusting the threshold resistance resistance value of threshold control unit
Under the conditions of constant current, actuating of relay current threshold is adjustable.
Wherein, when input current reverse phase, relay is failure to actuate.
Wherein, extra electric current is limited in a certain range through overvoltage limiting unit, and by voltage when input current is excessive
It is interior.
Wherein, from the current loop input terminal input current of breaking coil, until action of relay contact, time delays are small
In 15ms.
The beneficial effect of the embodiment of the present invention is: settable actuating of relay threshold value effectively prevent relay misoperation, and
Voltage is limited when electric current is larger, protective relay reduces the influence to trip(ping) circuit, provides sensitive reliable again dynamic signal.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of heavy dynamic circuit of the embodiment of the present invention one.
Fig. 2 is the test structural schematic diagram in the embodiment of the present invention one under different parameters setting.
Specific embodiment
The explanation of following embodiment be with reference to attached drawing, can be to the specific embodiment implemented to the example present invention.
It please refers to shown in Fig. 1, the embodiment of the present invention one provides a kind of heavy dynamic circuit, including threshold control unit I, voltage limit
Unit II and contact output unit III, threshold control unit I processed include four be serially connected in the current loop of breaking coil in parallel
A threshold resistance (R1, R2, R3, R4)；Voltage limiting unit II includes the diode of two groups of reverse parallel connections, and every group of diode includes
Diode (D1, D2 of two series aiding connections；D3, D4), the threshold control unit II is coupled in parallel in the current loop；
The contact output unit III includes two relays (J1, J2) in parallel, the contact output unit III also access in parallel
Into the current loop.
Specifically, threshold control unit I, voltage limiting unit II and contact output unit III are parallel to breaking coil
Current loop in, threshold resistance R1 ~ R4 in threshold control unit I uses power resistor, and rated power is at least 3W；Voltage
Diode D1 ~ D4 in limiting unit II uses rectifier diode, positive to be limited within 1.5V with backward voltage, wherein the
One group of diode includes that the first diode D1 of series aiding connection and the anode of the second diode D2, first diode D1 are returned with electric current
The electric current electrode input end on road is connected, and the cathode of the second diode D2 is connected with the electric current negative input of current loop, and second
Group diode includes the third diode D3 and the 4th diode D4 of series aiding connection, the cathode and current loop of third diode D3
Electric current electrode input end be connected, the 4th diode D4 anode be connected with the electric current negative input of current loop；Contact is defeated
Out the first relay J1 and the second relay J2 of unit III include a normal opened contact (5,6) and normally closed contact (7,
8).Threshold resistance R1 ~ R4 that input current flows through threshold control unit I generates pressure drop, by two poles of voltage control unit II
Driving voltage is provided for relay coil after pipe progress voltage limitation, two relays J1, J2 is driven to carry out the outputs of multichannel contact.
The diode of voltage limiting unit II limits relay coil voltage, can protect relay, reduces the influence to trip(ping) circuit.
Two relays of contact output unit III use low voltage rating relay, to reduce pressure drop, reduce the influence to circuit.
After input current reaches movement threshold, the actuating of relay, normal opened contact closure output；Input current continues to increase
Greatly, the electric current for flowing through threshold resistance R1, R2, R3, R4 in parallel increases, and the pressure drop of generation increases, since diode is to be connected in parallel on
In current loop, both end voltage follows raising, according to the VA characteristic curve of diode it is found that forward voltage reaches dead zone electricity
It flows through its electric current after pressure to increase sharply, unwanted currents are returned by diode, to play the role of limiting voltage, protective relay
Coil.
Due to being concatenated into current loop after threshold control unit, voltage limiting unit and contact output unit parallel connection,
Electric current distributes in each unit according to resistance value inverse proportion, should fully consider relay J1 and J2 when threshold resistance R1~R4 is arranged
The influence of coil resistance when electric current is excessive, considers diode non-linear effects.
The current loop of breaking coil usually has several typical load current values of 1A, 2A, 4A, volume due to impedance difference
When definite value 1A, the parameter of each element is as follows in circuit:
R1 ~ R4 uses the straight cutting power resistor that resistance value is 3W for the rated power of 12 Ω, and D1 ~ D4 uses diode 1N5408；After
Electric appliance J1, J2 use ST2-DC1.5V-H57.
When rated value 2A, the parameter of each element is as follows in circuit:
R1 ~ R4 uses the straight cutting power resistor that resistance value is 3W for the rated power of 4.7 Ω, and D1 ~ D4 uses diode 1N5408；After
Electric appliance J1, J2 use ST2-DC1.5V-H57.
When rated value 4A, the parameter of each element is as follows in circuit:
R1 ~ R4 uses the straight cutting power resistor that resistance value is 3W for the rated power of 2 Ω, and D1 ~ D4 uses diode 1N5408；Relay
Device J1, J2 use ST2-DC1.5V-H57.
As shown in Figure 2, due to the discreteness of device, there are certain models for action current threshold value for test result under different parameters
It encloses, meets 30% ~ 50% rated value of setting, drop-off to pick-up radio, which meets, is greater than 0.3.
Circuit is moved again corresponding to the embodiment of the present invention one, the embodiment of the present invention two also provides its driving method, including with
Lower step:
It realizes under different nominal current conditions by adjusting the threshold resistance resistance value of threshold control unit, is set when input current reaches
When determining threshold value, relay tip closure output；Or identical volume is realized by adjusting the threshold resistance resistance value of threshold control unit
Under the conditions of constant current, actuating of relay current threshold is adjustable.For example, it if the rated value of input current is 1A, needs
0.5A relay just acts, then may be implemented by adjusting the threshold resistance resistance value of threshold control unit；From the perspective of from another angle
For, the specified input current of 1A, the threshold resistance resistance value of adjustable threshold control unit makes relay in the movement of setting
Threshold value such as 0.6A movement, or act relay in 0.7A.
Wherein, when input current reverse phase, relay is failure to actuate；
Wherein, extra electric current limits in a certain range through overvoltage limiting unit, and by voltage when input current is excessive.When
Electric current flows through the voltage rating that pressure drop caused by threshold control unit and relay output unit coil is more than relay coil
When, it is believed that electric current is excessive.Since diode belongs to nonlinear device, as its both end voltage increases, its electric current right and wrong is flowed through
Linear, select suitable diode to may be implemented one compared with wide-range current.
From the current loop input terminal input current of breaking coil, until action of relay contact, time delays are less than
15ms。
By above description it is found that the beneficial effect of the embodiment of the present invention is: settable actuating of relay threshold value, effectively
Relay misoperation is prevented, and limits voltage when electric current is larger, protective relay reduces the influence to trip(ping) circuit, provides spirit
Quick reliable again dynamic signal.
The above disclosure is only the preferred embodiments of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, therefore equivalent changes made in accordance with the claims of the present invention, is still within the scope of the present invention.
Claims (8)
1. a kind of heavy dynamic circuit, which is characterized in that including threshold control unit, voltage limiting unit and contact output unit,
The threshold control unit includes four threshold resistances in parallel being serially connected in the current loop of breaking coil；
The voltage limiting unit includes the diode of two groups of reverse parallel connections, and every group of diode includes two poles of two series aiding connections
Pipe, the threshold control unit are coupled in parallel in the current loop；
The contact output unit includes two relays in parallel, and the contact output unit is also coupled in parallel to the electric current
In circuit.
2. heavy dynamic circuit according to claim 1, which is characterized in that the threshold resistance is power resistor, rated power
At least 3W.
3. heavy dynamic circuit according to claim 1, which is characterized in that first group of diode includes the 1st of series aiding connection
The anode of pole pipe and the second diode, first diode is connected with the electric current electrode input end of current loop, the second diode
Cathode is connected with the electric current negative input of current loop, and second group of diode includes the third diode and the 4th of series aiding connection
Diode, the cathode of third diode are connected with the electric current electrode input end of current loop, the anode and electric current of the 4th diode
The electric current negative input in circuit is connected.
4. heavy dynamic circuit according to claim 3, which is characterized in that diode is rectifier diode, positive and reversed electricity
Pressure is limited within 1.5V.
5. a kind of control method of heavy dynamic circuit according to any one of claims 1-4, comprising the following steps:
It realizes under different nominal current conditions by adjusting the threshold resistance resistance value of threshold control unit, is set when input current reaches
When determining threshold value, relay tip closure output；Or identical volume is realized by adjusting the threshold resistance resistance value of threshold control unit
Under the conditions of constant current, actuating of relay current threshold is adjustable.
6. control method according to claim 5, which is characterized in that when input current reverse phase, relay is failure to actuate.
7. control method according to claim 5, which is characterized in that extra electric current is through overvoltage when input current is excessive
Limiting unit, and in a certain range by voltage limitation.
8. control method according to claim 5, which is characterized in that input electricity from the current loop input terminal of breaking coil
It flows, until action of relay contact, time delays are less than 15ms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910217444.3A CN109994340B (en) | 2019-03-21 | 2019-03-21 | A repeat circuit and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910217444.3A CN109994340B (en) | 2019-03-21 | 2019-03-21 | A repeat circuit and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109994340A true CN109994340A (en) | 2019-07-09 |
| CN109994340B CN109994340B (en) | 2021-08-06 |
Family
ID=67129813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910217444.3A Active CN109994340B (en) | 2019-03-21 | 2019-03-21 | A repeat circuit and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109994340B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111380156A (en) * | 2020-03-19 | 2020-07-07 | 海信（山东）空调有限公司 | Control circuit, control chip and air conditioning system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101425428A (en) * | 2007-11-02 | 2009-05-06 | 上海申瑞电力科技股份有限公司 | Reacting electric relay device for electric power |
| CN201527933U (en) * | 2009-10-30 | 2010-07-14 | 许继集团有限公司 | Driving circuit for tripping and closing coil |
| CN102270546A (en) * | 2010-06-07 | 2011-12-07 | 鸿富锦精密工业（深圳）有限公司 | Drive circuit of relay |
| CN203631433U (en) * | 2013-12-30 | 2014-06-04 | 浙江南瑞电力自动化有限公司 | A universal type circuit breaker self-hold circuit |
| US20150054517A1 (en) * | 2013-08-26 | 2015-02-26 | Fujitsu Limited | Diagnosis apparatus and diagnosis method for relay circuit |
| CN108288565A (en) * | 2018-01-25 | 2018-07-17 | 南京御弟哥哥电气有限公司 | A kind of anti-interference relay circuit |
-
2019
- 2019-03-21 CN CN201910217444.3A patent/CN109994340B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101425428A (en) * | 2007-11-02 | 2009-05-06 | 上海申瑞电力科技股份有限公司 | Reacting electric relay device for electric power |
| CN201527933U (en) * | 2009-10-30 | 2010-07-14 | 许继集团有限公司 | Driving circuit for tripping and closing coil |
| CN102270546A (en) * | 2010-06-07 | 2011-12-07 | 鸿富锦精密工业（深圳）有限公司 | Drive circuit of relay |
| US20150054517A1 (en) * | 2013-08-26 | 2015-02-26 | Fujitsu Limited | Diagnosis apparatus and diagnosis method for relay circuit |
| CN203631433U (en) * | 2013-12-30 | 2014-06-04 | 浙江南瑞电力自动化有限公司 | A universal type circuit breaker self-hold circuit |
| CN108288565A (en) * | 2018-01-25 | 2018-07-17 | 南京御弟哥哥电气有限公司 | A kind of anti-interference relay circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111380156A (en) * | 2020-03-19 | 2020-07-07 | 海信（山东）空调有限公司 | Control circuit, control chip and air conditioning system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109994340B (en) | 2021-08-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105493218A (en) | Circuit breaker with hybrid switch | |
| CN204156500U (en) | Overcurrent-overvoltage protecting circuit | |
| CN203481783U (en) | Short circuit and overcurrent protection circuit and mass production test equipment | |
| CN105098721A (en) | Overvoltage protection circuit and overvoltage protection method for converter sub-module | |
| CN103490374A (en) | Mass production test device and short-circuit current foldback circuit thereof | |
| CN103633616B (en) | A kind of current foldback circuit | |
| CN212781125U (en) | Adhesion fault detection system and alternating-current charging stake of relay | |
| CN101552451A (en) | Switch power supply cycle-by-cycle wave over-voltage protection circuit | |
| CN204578083U (en) | To ask for power type lightning arrester supervisory control system | |
| CN108879591A (en) | High current power supply protection circuit | |
| CN201345530Y (en) | Current foldback circuit | |
| CN108832590B (en) | Overcurrent protection relay | |
| CN109994340A (en) | A kind of heavy dynamic circuit and its control method | |
| CN107395175B (en) | MOS tube overcurrent protection circuit | |
| CN103475191A (en) | Control circuit of switching power supply | |
| CN104953537A (en) | Overload protection switching device | |
| CN105356425A (en) | Over-current turn-off circuit for direct-current solid-state power controller | |
| CN210957789U (en) | CT prevents module of opening a way | |
| CN201340826Y (en) | Circuit breaker with selectivity | |
| CN102064549B (en) | AC capacitor operation/cutting method and fling-cut switch circuit | |
| CN112349545B (en) | Direct current switch | |
| CN204283937U (en) | DC fan driving circuit and comprise the fan of this drive circuit | |
| CN201007991Y (en) | Short circuit, overload safeguard for transistor output | |
| CN201726099U (en) | Voltage deviation operated protector | |
| KR101171739B1 (en) | A switch power source cycle by cycle overvoltage protection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |