CN104934264B - A kind of method and system of protective relay - Google Patents
A kind of method and system of protective relay Download PDFInfo
- Publication number
- CN104934264B CN104934264B CN201510401676.6A CN201510401676A CN104934264B CN 104934264 B CN104934264 B CN 104934264B CN 201510401676 A CN201510401676 A CN 201510401676A CN 104934264 B CN104934264 B CN 104934264B
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- relay
- signal
- coupled device
- light coupled
- lmds light
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Classifications
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- 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
Abstract
This application provides a kind of method and system of protective relay, time T1 and relay needed for pre-recorded relay closure disconnect required time T2；When the operational order is closing relay, after the zero signal for detecting the transmission of the first LMDS Light Coupled Device, after the zero signal for detecting the transmission of the first LMDS Light Coupled Device, the time that one current electric grid cycle of delay subtracts T1 sends closure signal to relay module；When the operational order is disconnects relay, after the zero signal for detecting the transmission of the second LMDS Light Coupled Device, the time that one current electric grid cycle of delay subtracts T2 sends cut-off signal to relay module；So that moment of the relay in closure/disconnection, just at the zero point moment of civil power, the dash current that relay is subject to is minimum, to reach protective relay effect, improves the service life of relay.
Description
Technical field
The present invention relates to smart home field, specially a kind of method and system of protective relay.
Background technology
Smart home is by technology of Internet of things by various equipment (such as audio ＆ video equipment, illuminator, the curtain control in family
System, airconditioning control, safety-protection system, Digital Theater System, video server, shadow cabinet system, network home appliance etc.) connect together,
Home wiring control is provided, it is Lighting control, remote control using telephone, indoor and outdoor remote control, burglar alarm, environmental monitoring, HVAC control, infrared
A variety of functions and the means such as forwarding and programmable Timer control.Wherein, the Switch product such as intelligent switch, Intelligent socket is intelligence
A kind of staple product form of energy household.
At present, by the uncertainty of utility grid load and intelligent switch class product plug institute are load-carrying uncertain
Property, the core devices relay of intelligent switch class product is result in the action of on and off, can produce very big impact electricity
Stream, causes relay to burn.
Solution to this problem, is by increasing using material or using instead the side of special material in the prior art
Formula, to improve the withstanding current capability of relay, but this method can cause the increase of relay volume and the rising of cost, external
See and require that such a way is very unfavorable in miniaturization and the fierce market environment of price competition.
The content of the invention
In view of this, the invention provides a kind of method of protective relay, the volume and cost of relay are not being increased
On the premise of, reach the purpose of protective relay.
To achieve the above object, the invention provides following technical scheme：
A kind of method of protective relay, it is characterised in that
Time T1 and relay needed for pre-recorded relay closure disconnect required time T2；
Receive operational order；
When the operational order is closing relay, after the zero signal for detecting the transmission of the first LMDS Light Coupled Device, prolong
The time that a slow current electric grid cycle subtracts T1 sends closure signal to relay module；
When the operational order is disconnects relay, after the zero signal for detecting the transmission of the second LMDS Light Coupled Device, prolong
The time that a slow current electric grid cycle subtracts T2 sends cut-off signal to relay module；
The zero signal is first zero signal after operational order is received.
It is preferred that, the time T1 needed for the meter relay closure, including：
When detecting first zero signal of the first LMDS Light Coupled Device transmission, closure signal is sent to relay module；
When detecting the optocoupler signal of the second LMDS Light Coupled Device transmission, calculate when detecting the optocoupler signal and the first light
Time difference T1 during the first zero signal that coupled apparatus is sent, and record.
It is preferred that, the meter relay disconnects required time T2, including：
When detecting first zero signal of the second LMDS Light Coupled Device transmission, cut-off signal is sent to relay module；
When detecting the optocoupler blackout of the second LMDS Light Coupled Device transmission, with the second optocoupler during calculating optocoupler blackout
Time difference T2 during first zero signal that clutch part is sent, and record.
A kind of system of protective relay, it is characterised in that including：
Optical coupler module, for sending signal to MCU module；
The MCU module being connected with optical coupler module, time T1 and relay needed for being closed for meter relay disconnect
Required time T2, receives operational order and sends closure/cut-off signal to relay module；When the operational order is to close
When closing relay, after the zero signal for detecting the transmission of the first LMDS Light Coupled Device, one current electric grid cycle of delay subtracts T1's
Time sends closure signal to relay module；When the operational order is disconnects relay, the second photo-coupler is detected
After the zero signal that part is sent, the time that one current electric grid cycle of delay subtracts T2 sends cut-off signal to relay module；
The relay module being connected with MCU module, closure/cut-off signal for receiving MCU module transmission, is controlled with this
Closure/disconnection of relay.
It is preferred that, the optical coupler module includes：
First LMDS Light Coupled Device, the first input end of first LMDS Light Coupled Device is connected with live wire, the second input with
Zero line is connected, the first output head grounding of first LMDS Light Coupled Device, the first input end phase of the second output end and MCU module
Even；
First protection diode, first protection diode is connected to the first input end and of the first LMDS Light Coupled Device
It is in parallel with the first LMDS Light Coupled Device between two inputs；
Second LMDS Light Coupled Device, the first input end of second LMDS Light Coupled Device is connected with live wire, the second input with
Zero line is connected, the first output head grounding of second LMDS Light Coupled Device, the second input phase of the second output end and MCU module
Even；
Second protection diode, second protection diode is connected to the first input end and of the second LMDS Light Coupled Device
It is in parallel with the second LMDS Light Coupled Device between two inputs.
It is preferred that, the MCU module includes three universal input/output interface GPIO；The universal input/output interface
GPIO is interruptable.
It is preferred that, the relay module includes：
Relay, the relay includes pressure sensitivity controller and switch,
Described pressure sensitivity controller one end connects supply voltage VCC, the output end connection of the other end and MCU module；
Among the access live wire of the switch；
3rd protection diode, the 3rd protection diode be connected to supply voltage VCC and MCU module output end it
Between, it is in parallel with the pressure sensitivity controller.
As shown in the above, the invention provides a kind of method of protective relay, pre-recorded relay closes institute
The time T1 and relay needed disconnects required time T2；When the operational order is closing relay, the first light is detected
After the zero signal that coupled apparatus is sent, after the zero signal for detecting the transmission of the first LMDS Light Coupled Device, postpone a current electricity
The time that the net week phase subtracts T1 sends closure signal to relay module；；When the operational order is disconnects relay, detection
After the zero signal sent to the second LMDS Light Coupled Device, one current electric grid cycle of delay subtracts T2 time to relay module
Send cut-off signal；So that moment of the relay in closure/disconnection, just at the zero point moment of civil power, what relay was subject to
Dash current is minimum, to reach protective relay effect, improves the service life of relay.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is a kind of method schematic diagram of protective relay disclosed in the embodiment of the present invention；
Fig. 2 is a kind of system construction drawing of protective relay disclosed in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Utility grid is usually a sine wave, and when the sine wave goes to y=0 position, the value of alternating voltage is most
Small, current value now is also minimum, and the moment is called the zero point moment.Relay is when performing disconnection and closed action, when just
Dash current is maximum when being in the crest of civil power, just at civil power zero point when dash current it is minimum, and what relay was subject to
Dash current is smaller, damages smaller, then possesses longer service life.
In view of this, as shown in figure 1, present embodiments providing a kind of method of protective relay, it is specially：
Time T1 and relay needed for S101, pre-recorded relay closure disconnect required time T2；
S102, reception operational order；
When the operational order is closing relay, step S103 is performed；When the operational order is disconnection relay
When, perform step S104；
S103, detect the first LMDS Light Coupled Device transmission zero signal after, delay one current electric grid cycle subtract T1
Time to relay module send closure signal；
S104, detect the second LMDS Light Coupled Device transmission zero signal after, delay one current electric grid cycle subtract T2
Time to relay module send cut-off signal.
By taking conventional AC 220V civil powers as an example, grid cycle is 0.02S, then step S103 is：Detect the first optical coupling
After the zero signal that device is sent, delay (0.02-T1) S sends closure signal to relay module；Similarly, step S104 is：
After the zero signal for detecting the transmission of the second LMDS Light Coupled Device, delay (0.02-T2) S sends cut-off signal to relay module.
It should be noted that the zero signal in step S103 and S104 is first zero after operational order is received
Point signal.
Present embodiments provide a kind of method of protective relay, time T1 needed for pre-recorded relay closure and after
Electrical equipment disconnects required time T2；When the operational order is closing relay, the transmission of the first LMDS Light Coupled Device is detected
After zero signal, after the zero signal for detecting the transmission of the first LMDS Light Coupled Device, one current electric grid cycle of delay subtracts T1's
Time sends closure signal to relay module；；When the operational order is disconnects relay, the second photo-coupler is detected
After the zero signal that part is sent, the time that one current electric grid cycle of delay subtracts T2 sends cut-off signal to relay module；
So that moment of the relay in closure/disconnection, just at the zero point moment of civil power, the dash current that relay is subject to is minimum,
To reach protective relay effect, the service life of relay is improved.
Optionally, in another embodiment of the invention, include the time required to the meter relay closure the step of T1：
S111, detect the first LMDS Light Coupled Device transmission first zero signal when, sent immediately to relay module
Closure signal；
S112, when detecting the optocoupler signal of the second LMDS Light Coupled Device transmission, when calculating detects the optocoupler signal with
Time difference T1 during the first zero signal that the first LMDS Light Coupled Device is sent, and record.
Specifically, not being defaulted as off-state under electrifying condition during the design of intelligent switch class product repeat circuit, work as intelligence
When switch is electric on AC220V/50Hz civil powers, as shown in Fig. 2 the LMDS Light Coupled Device D5 in optical coupler module 101 can collect one
Individual frequency is 50Hz square-wave signal, and this signal is conveyed into MCU module by GPIO3, and MCU module is detecting GPIO3
During first zero signal in the square-wave signal sent, send closure signal to relay module 102 and (put GPIO1
It is low), and t0 is designated as at the time of first zero signal will be received, at this moment relay K1 can be acted, and gone to and closed by off-state
Conjunction state.
After relay is closed, the LMDS Light Coupled Device D6 in optical coupler module 101 can also collect a cycle for 50Hz
Square-wave signal, and MCU module is conveyed to by GPIO2, the initial time that MCU module receives D6 optocoupler signals is designated as t1,
The difference that MCU module calculates t1-t0 is the time T1 needed for the closure of relay, and is preserved.
It should be noted that by the difference of relay institute coiling sensibility reciprocal, the closure required time of each relay has
Different, but the closure required time of relay monomer can be accurately tested out through the above way.
Optionally, in another embodiment of the invention, include the time required to the meter relay disconnects the step of T2：
S121, detect the second LMDS Light Coupled Device transmission first zero signal when, sent immediately to relay module
Cut-off signal；
S122, when detecting the optocoupler blackout of the second LMDS Light Coupled Device transmission, with the when calculating optocoupler blackout
Time difference T2 during first zero signal that two LMDS Light Coupled Devices are sent, and record.
Similarly, with reference to Fig. 2, under relay closure situation, MCU module is detecting GPIO2 first zero signal
Cut-off signal (drawing high GPIO1) is sent to relay module immediately afterwards, and MCU module is detected into first zero point of GPIO2
T2 is designated as at the time of signal, at this moment relay is disconnected, and t3, MCU module meter are designated as at the time of when the GPIO2 signals that can't detect
The difference for calculating t3-t2 is the time T2 needed for the disconnection of relay, by the difference of relay institute coiling sensibility reciprocal, each
There is different the time required to the disconnection of relay, needed for can accurately testing out the disconnection of relay monomer through the above way
Time.
As shown in Fig. 2 another embodiment of the present invention provides a kind of system of protective relay, including：
Optical coupler module, for sending signal to MCU module；
The MCU module being connected with optical coupler module, time T1 and relay needed for being closed for meter relay disconnect
Required time T2, receives operational order and sends closure/cut-off signal to relay module；When the operational order is to close
When closing relay, after the zero signal for detecting the transmission of the first LMDS Light Coupled Device, one current electric grid cycle of delay subtracts T1's
Time sends closure signal to relay module；When the operational order is disconnects relay, the second photo-coupler is detected
After the zero signal that part is sent, the time that one current electric grid cycle of delay subtracts T2 sends cut-off signal to relay module；
The relay module being connected with MCU module, closure/cut-off signal for receiving MCU module transmission, is controlled with this
Closure/disconnection of relay.
Specifically, as shown in Fig. 2 the optical coupler module includes：
First LMDS Light Coupled Device, the first input end of first LMDS Light Coupled Device is connected with live wire L, the second input with
The first input end of zero line N connections, the first output head grounding of first LMDS Light Coupled Device, the second output end and MCU module
It is connected；
First protection diode, first protection diode is connected to the first input end and of the first LMDS Light Coupled Device
It is in parallel with the first LMDS Light Coupled Device between two inputs；
Second LMDS Light Coupled Device, the first input end of second LMDS Light Coupled Device is connected with live wire L, the second input with
Second input of zero line N connections, the first output head grounding of second LMDS Light Coupled Device, the second output end and MCU module
It is connected；
Second protection diode, second protection diode is connected to the first input end and of the second LMDS Light Coupled Device
It is in parallel with the second LMDS Light Coupled Device between two inputs.
Specifically, the MCU module includes three universal input/output interface GPIO；The universal input/output interface
GPIO is interruptable.
Specifically, the relay module includes：
Relay, the relay includes pressure sensitivity controller and switch,
Described pressure sensitivity controller one end connects supply voltage VCC, the output end connection of the other end and MCU module；
Among the access live wire of the switch；
3rd protection diode, the 3rd protection diode be connected to supply voltage VCC and MCU module output end it
Between, it is in parallel with the pressure sensitivity controller.
In the present embodiment, the software flow part of the system of protective relay and common intelligent switch class product basic one
Cause, system can be the time required to the closing and disconnection of relay be tested out before dispatching from the factory, and is recorded in MCU module, is being held every time
Performed when row is closed and disconnection is acted according to the method in a upper embodiment.
A kind of system of protective relay, including optical coupler module are present embodiments provided, is believed for being sent to MCU module
Number；The MCU module being connected with optical coupler module, time T1 and relay needed for being closed for meter relay disconnect required
Time T2, receives operational order and sends closure/cut-off signal to relay module；When the operational order is closing relay
During device, after the zero signal for detecting the transmission of the first LMDS Light Coupled Device, one current electric grid cycle of delay subtract T1 time to
Relay module sends closure signal；When the operational order is disconnects relay, the transmission of the second LMDS Light Coupled Device is detected
Zero signal after, one current electric grid cycle of delay subtracts T2 time and sends cut-off signal to relay module；With MCU moulds
The connected relay module of block, closure/cut-off signal for receiving MCU module transmission, with the closure of this control relay/disconnected
Open.And cause relay in the moment of closure/disconnection, just at the zero point moment of civil power, the dash current that relay is subject to
Minimum, to reach protective relay effect, improves the service life of relay.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality
Body or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or deposited between operating
In any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Nonexcludability is included, so that process, method, article or equipment including a series of key elements not only will including those
Element, but also other key elements including being not expressly set out, or also include being this process, method, article or equipment
Intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Also there is other identical element in process, method, article or equipment including the key element.
Described above is only the embodiment of the application, it is noted that for the ordinary skill people of the art
For member, on the premise of the application principle is not departed from, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as the protection domain of the application.
Claims (6)
1. a kind of method of protective relay, it is characterised in that
Time T1 and relay needed for pre-recorded relay closure disconnect required time T2；
Receive operational order；
When the operational order is closing relay, after the zero signal for detecting the transmission of the first LMDS Light Coupled Device, delay one
The time that the individual current electric grid cycle subtracts T1 sends closure signal to relay module；
When the operational order is disconnects relay, after the zero signal for detecting the transmission of the second LMDS Light Coupled Device, delay one
The time that the individual current electric grid cycle subtracts T2 sends cut-off signal to relay module；
The zero signal is first zero signal after operational order is received；
Time T1 needed for the meter relay closure, including：
When detecting first zero signal of the first LMDS Light Coupled Device transmission, closure signal is sent to relay module；
When detecting the optocoupler signal of the second LMDS Light Coupled Device transmission, calculate when detecting the optocoupler signal and the first optical coupling
Time difference T1 during the first zero signal that device is sent, and record.
2. according to the method described in claim 1, it is characterised in that the meter relay disconnect needed for time T2, including：
When detecting first zero signal of the second LMDS Light Coupled Device transmission, cut-off signal is sent to relay module；
When detecting the optocoupler blackout of the second LMDS Light Coupled Device transmission, with the second photo-coupler during calculating optocoupler blackout
Time difference T2 during first zero signal that part is sent, and record.
3. a kind of system of protective relay, it is characterised in that including：
Optical coupler module, for sending signal to MCU module；
The MCU module being connected with optical coupler module, needed for time T1 and relay needed for being closed for meter relay disconnect
Time T2, receive operational order and to relay module send closure/cut-off signal；When the operational order for closure after
During electrical equipment, after the zero signal for detecting the transmission of the first LMDS Light Coupled Device, one current electric grid cycle of delay subtracts T1 time
Closure signal is sent to relay module；When the operational order is disconnects relay, the second LMDS Light Coupled Device hair is detected
After the zero signal sent, the time that one current electric grid cycle of delay subtracts T2 sends cut-off signal to relay module；
The relay module being connected with MCU module, closure/cut-off signal for receiving MCU module transmission, relay is controlled with this
Closure/disconnection of device；
Time T1 needed for the meter relay closure, including：
When detecting first zero signal of the first LMDS Light Coupled Device transmission, closure signal is sent to relay module；
When detecting the optocoupler signal of the second LMDS Light Coupled Device transmission, calculate when detecting the optocoupler signal and the first optical coupling
Time difference T1 during the first zero signal that device is sent, and record.
4. system according to claim 3, it is characterised in that the optical coupler module includes：
First LMDS Light Coupled Device, the first input end of first LMDS Light Coupled Device is connected with live wire, the second input and zero line
Connection, the first output head grounding of first LMDS Light Coupled Device, the second output end is connected with the first input end of MCU module；
First protection diode, first protection diode is connected to the first input end of the first LMDS Light Coupled Device and second defeated
Enter between end, it is in parallel with the first LMDS Light Coupled Device；
Second LMDS Light Coupled Device, the first input end of second LMDS Light Coupled Device is connected with live wire, the second input and zero line
Connection, the first output head grounding of second LMDS Light Coupled Device, the second output end is connected with the second input of MCU module；
Second protection diode, second protection diode is connected to the first input end of the second LMDS Light Coupled Device and second defeated
Enter between end, it is in parallel with the second LMDS Light Coupled Device.
5. system according to claim 3, it is characterised in that the MCU module includes three universal input/output interfaces
GPIO；The universal input/output interface GPIO is interruptable.
6. system according to claim 3, it is characterised in that the relay module includes：
Relay, the relay includes pressure sensitivity controller and switch,
Described pressure sensitivity controller one end connects supply voltage VCC, the output end connection of the other end and MCU module；
Among the access live wire of the switch；
3rd protection diode, the 3rd protection diode is connected between supply voltage VCC and the output end of MCU module,
It is in parallel with the pressure sensitivity controller.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510401676.6A CN104934264B (en) | 2015-07-09 | 2015-07-09 | A kind of method and system of protective relay |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510401676.6A CN104934264B (en) | 2015-07-09 | 2015-07-09 | A kind of method and system of protective relay |
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| CN104934264A CN104934264A (en) | 2015-09-23 |
| CN104934264B true CN104934264B (en) | 2017-08-29 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105958433B (en) * | 2016-06-30 | 2019-08-09 | 北京海尔广科数字技术有限公司 | A kind of detection of relay zero-crossing, calibration method and device |
| CN106384696A (en) * | 2016-10-31 | 2017-02-08 | 浙江新涛电子科技股份有限公司 | Relay release anti-arc zero release delay dynamic tracking control method |
| CN110506318B (en) * | 2017-04-13 | 2022-05-17 | 深圳和而泰智能控制股份有限公司 | Relay control method, control circuit and processor |
| CN107248478B (en) * | 2017-07-06 | 2020-09-04 | 惠州市元盛科技有限公司 | Method and circuit for protecting relay |
| CN108089120A (en) * | 2017-11-28 | 2018-05-29 | 中国能源建设集团华东电力试验研究院有限公司 | Improve rapid grounding plug-in strip branch wire time measuring accuracy analysis system |
| CN108335931A (en) * | 2018-01-16 | 2018-07-27 | 青岛海尔智能家电科技有限公司 | The control method and device of capacitive load zero crossing conducting |
| CN109036964B (en) * | 2018-08-11 | 2020-05-08 | 深圳市健思研科技有限公司 | Control method for preventing contact adhesion, storage medium, control device and relay |
| CN109585221B (en) * | 2018-12-19 | 2020-03-20 | 上海西阔电子科技有限公司 | Switch arc extinction control method |
| CN109494120A (en) * | 2018-12-24 | 2019-03-19 | 深圳和而泰小家电智能科技有限公司 | Control relay circuit |
| TWI702628B (en) * | 2019-01-11 | 2020-08-21 | 旺玖科技股份有限公司 | Switch device capable of automatically detecting and adjusting zero cross point |
| CN113391562A (en) * | 2021-01-26 | 2021-09-14 | 浙江利尔达客思智能科技有限公司 | Panel convenient for wiring installation and capable of improving loading capacity and flexible use method |
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| US9991075B2 (en) * | 2013-10-04 | 2018-06-05 | Lutron Electronics Co., Inc. | Controlling a controllably conductive device based on zero-crossing detection |
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| CN101577192A (en) * | 2009-06-12 | 2009-11-11 | 百利通电子(上海)有限公司 | Method of zero passage switch of electromagnetic relay and circuit |
| CN202917398U (en) * | 2012-10-22 | 2013-05-01 | 厦门市芯阳科技有限公司 | Self-adjusting zero-crossing control circuit for electromagnetic relay |
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