CN104934264A - Method of protecting relay and system thereof - Google Patents

Method of protecting relay and system thereof Download PDF

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Publication number
CN104934264A
CN104934264A CN201510401676.6A CN201510401676A CN104934264A CN 104934264 A CN104934264 A CN 104934264A CN 201510401676 A CN201510401676 A CN 201510401676A CN 104934264 A CN104934264 A CN 104934264A
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CN
China
Prior art keywords
relay
light coupled
signal
module
time
Prior art date
Application number
CN201510401676.6A
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Chinese (zh)
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CN104934264B (en
Inventor
姜涛
黄焕彬
刘德银
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深圳市兰丁科技有限公司
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Priority to CN201510401676.6A priority Critical patent/CN104934264B/en
Publication of CN104934264A publication Critical patent/CN104934264A/en
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Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/02Circuit 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
    • H01H47/18Circuit 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

The invention provides a method of protecting a relay and a system thereof. The method comprises the following steps of recording relay closing time T1 and relay disconnection time T2 in advance; when an operation instruction is relay closing and after a zero signal sent by a first optical coupler is detected, delaying time of subtracting the T1 from a current power grid period and then sending a closing signal to a relay module; when the operation instruction is relay disconnection and after a zero signal sent by a second optical coupler is detected, delaying time of subtracting the T2 from the current power grid period and then sending a disconnection signal to the relay module. Therefore, at the moment of relay closing/disconnection, the relay is at zero point time of electric supply. An impact current on the relay is minimum so that an effect of protecting the relay is reached and the service life of the relay is prolonged.

Description

A kind of method and system of protection relay

Technical field

The present invention relates to Smart Home field, be specially a kind of method and system of protection relay.

Background technology

Various equipment (as audio & video equipment, illuminator, curtain control, airconditioning control, safety-protection system, Digital Theater System, video server, shadow cabinet system, network home appliance etc.) in family are connected together by technology of Internet of things by Smart Home, provide several functions and the means such as home wiring control, Lighting control, remote control using telephone, indoor and outdoor remote control, burglar alarm, environmental monitoring, HVAC control, infrared forwarding and programmable Timer control.Wherein, the Switch such as intelligent switch, Intelligent socket product is a kind of staple product form of Smart Home.

At present, due to uncertainty and the load-carrying uncertainty of intelligent switch series products plug of utility grid load, the core devices relay that result in intelligent switch series products, when the action of Kai Heguan, can produce very large impulse current, cause relay to burn.

Solution to this problem in the prior art, by increasing the mode using material or use special material instead, to improve the withstanding current capability of relay, but the method can cause the increase of relay volume and the rising of cost, in miniaturized to appearance requirement and that price competition is fierce market environment, this kind of way is very unfavorable.

Summary of the invention

In view of this, the invention provides a kind of method of protection relay, under the prerequisite of the volume and cost that do not increase relay, reach the object of protection relay.

For achieving the above object, the invention provides following technical scheme:

A method for protection relay, is characterized in that,

Time T2 needed for time T1 needed for pre-recorded relay closes and relay disconnect;

Receive operational order;

When described operational order is closing relay, after the zero signal that the first Light Coupled Device sends being detected, postponing the time that a current electric grid cycle deducts T1 sends closure signal to relay module;

When described operational order is off relay, after the zero signal that the second Light Coupled Device sends being detected, postponing the time that a current electric grid cycle deducts T2 sends cut-off signal to relay module;

Described zero signal is first zero signal after receiving operational order.

Preferably, described meter relay closes required time T1, comprising:

When first zero signal of the first Light Coupled Device transmission being detected, send closure signal to relay module;

When the optocoupler signal that the second Light Coupled Device sends being detected, calculate when described optocoupler signal being detected and first zero signal that the first Light Coupled Device sends time time difference T1, and record.

Preferably, the time T2 needed for described meter relay disconnects, comprising:

When first zero signal of the second Light Coupled Device transmission being detected, send cut-off signal to relay module;

When the optocoupler blackout that the second Light Coupled Device sends being detected, when calculating optocoupler blackout and the second Light Coupled Device send first zero signal time time difference T2, and record.

A system for protection relay, is characterized in that, comprising:

Optical coupler module, for sending signal to MCU module;

The MCU module be connected with optical coupler module, closes the time T2 needed for required time T1 and relay disconnection for meter relay, receives operational order and sends closed/cut-off signal to relay module; When described operational order is closing relay, after the zero signal that the first Light Coupled Device sends being detected, postponing the time that a current electric grid cycle deducts T1 sends closure signal to relay module; When described operational order is off relay, after the zero signal that the second Light Coupled Device sends being detected, postponing the time that a current electric grid cycle deducts T2 sends cut-off signal to relay module;

The relay module be connected with MCU module, for receive that MCU module sends closed/cut-off signal, with this control relay closed/disconnect.

Preferably, described optical coupler module comprises:

First Light Coupled Device, the first input end of described first Light Coupled Device is connected with live wire, and the second input is connected with zero line, the first output head grounding of described first Light Coupled Device, and the second output is connected with the first input end of MCU module;

First protection diode, described first protection diode is connected between the first input end of the first Light Coupled Device and the second input, in parallel with the first Light Coupled Device;

Second Light Coupled Device, the first input end of described second Light Coupled Device is connected with live wire, and the second input is connected with zero line, the first output head grounding of described second Light Coupled Device, and the second output is connected with the second input of MCU module;

Second protection diode, described second protection diode is connected between the first input end of the second Light Coupled Device and the second input, in parallel with the second Light Coupled Device.

Preferably, described MCU module comprises three universal input/output interface GPIO; Described universal input/output interface GPIO is interruptable.

Preferably, described relay module comprises:

Relay, described relay comprises pressure sensitivity controller and switch,

Described pressure sensitivity controller one end connects supply power voltage VCC, and the other end is connected with the output of MCU module;

Among the access live wire of described switch;

3rd protection diode, described 3rd protection diode is connected between supply power voltage VCC and the output of MCU module, in parallel with described pressure sensitivity controller.

As shown in the above, the invention provides a kind of method of protection relay, the time T2 needed for the time T1 needed for pre-recorded relay closes and relay disconnect; When described operational order is closing relay, after the zero signal that the first Light Coupled Device sends being detected, after the zero signal that the first Light Coupled Device sends being detected, postponing the time that a current electric grid cycle deducts T1 sends closure signal to relay module; ; When described operational order is off relay, after the zero signal that the second Light Coupled Device sends being detected, postponing the time that a current electric grid cycle deducts T2 sends cut-off signal to relay module; Make relay in the moment of closed/disconnection, be just in the moment at zero point of civil power, the impulse current that relay is subject to is minimum, to reach protection relay effect, improves the useful life of relay.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.

The method schematic diagram of Fig. 1 a kind of protection relay disclosed in the embodiment of the present invention;

The system construction drawing of Fig. 2 a kind of protection relay disclosed in the embodiment of the present invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

Utility grid is generally a sine wave, and when described sine wave goes to the position of y=0, the value of alternating voltage is minimum, and current value is now also minimum, claims this moment to be the moment at zero point.Relay perform disconnect and closed action time, when being just in the crest of civil power, impulse current is maximum, and when being just in the zero point of civil power, impulse current is minimum, and the impulse current that relay is subject to is less, damages less, then has longer useful life.

In view of this, as shown in Figure 1, present embodiments provide a kind of method of protection relay, be specially:

S101, the time T1 needed for pre-recorded relay closes and the time T2 needed for relay disconnection;

S102, reception operational order;

When described operational order is closing relay, perform step S103; When described operational order is off relay, perform step S104;

S103, the zero signal that the first Light Coupled Device sends detected after, postponing the time that a current electric grid cycle deducts T1 sends closure signal to relay module;

S104, the zero signal that the second Light Coupled Device sends detected after, postponing the time that a current electric grid cycle deducts T2 sends cut-off signal to relay module.

For conventional AC 220V civil power, grid cycle is 0.02S, then step S103 is: after the zero signal that the first Light Coupled Device sends being detected, and postpones (0.02-T1) S and sends closure signal to relay module; In like manner, step S104 is: after the zero signal that the second Light Coupled Device sends being detected, and postpones (0.02-T2) S and sends cut-off signal to relay module.

It should be noted that the zero signal in step S103 and S104 is first zero signal after receiving operational order.

Present embodiments provide a kind of method of protection relay, the time T2 needed for the time T1 needed for pre-recorded relay closes and relay disconnect; When described operational order is closing relay, after the zero signal that the first Light Coupled Device sends being detected, after the zero signal that the first Light Coupled Device sends being detected, postponing the time that a current electric grid cycle deducts T1 sends closure signal to relay module; ; When described operational order is off relay, after the zero signal that the second Light Coupled Device sends being detected, postponing the time that a current electric grid cycle deducts T2 sends cut-off signal to relay module; Make relay in the moment of closed/disconnection, be just in the moment at zero point of civil power, the impulse current that relay is subject to is minimum, to reach protection relay effect, improves the useful life of relay.

Optionally, in another embodiment of the invention, the step that described meter relay closes required time T1 comprises:

S111, detect first Light Coupled Device send first zero signal time, immediately to relay module send closure signal;

S112, when optocoupler signal that the second Light Coupled Device sends being detected, calculate when described optocoupler signal being detected and first zero signal that the first Light Coupled Device sends time time difference T1, and record.

Concrete, off-state is not defaulted as under electrifying condition during the design of intelligent switch series products repeat circuit, when intelligent switch powers at AC220V/50Hz civil power, as shown in Figure 2, it is the square-wave signal of 50Hz that Light Coupled Device D5 in optical coupler module 101 can collect a frequency, and this signal is flowed to MCU module by GPIO3, MCU module is when first zero signal in the described square-wave signal that GPIO3 sends here being detected, closure signal (being set low by GPIO1) is sent to relay module 102, and the moment receiving first zero signal is designated as t0, at this moment relay K 1 meeting action, closure state is gone to by off-state.

When after relay closes, Light Coupled Device D6 in optical coupler module 101 also can collect the square-wave signal that one-period is 50Hz, and flow to MCU module by GPIO2, the initial time that MCU module receives D6 optocoupler signal is designated as t1, the difference that MCU module calculates t1-t0 is the closed required time T1 of relay, and preserves.

It should be noted that, due to the difference of relay institute coiling sensibility reciprocal, the closed required time of each relay has different, but all accurately can test out the closed required time of relay monomer by the way.

Optionally, in another embodiment of the invention, the step of described meter relay disconnection required time T2 comprises:

S121, detect second Light Coupled Device send first zero signal time, immediately to relay module send cut-off signal;

S122, when optocoupler blackout that the second Light Coupled Device sends being detected, when calculating optocoupler blackout and the second Light Coupled Device send first zero signal time time difference T2, and record.

In like manner, with reference to figure 2, in relay closes situation, MCU module sends cut-off signal (being drawn high by GPIO1) to relay module immediately after first zero signal of GPIO2 being detected, and MCU module is detected the moment of GPIO2 first zero signal is designated as t2, at this moment relay disconnects, moment when the GPIO2 signal that can't detect is designated as t3, the difference that MCU module calculates t3-t2 is the time T2 needed for disconnection of relay, due to the difference of relay institute coiling sensibility reciprocal, the disconnection required time of each relay has different, accurately can test out the disconnection required time of relay monomer by the way.

As shown in Figure 2, another embodiment of the present invention provides a kind of system of protection relay, comprising:

Optical coupler module, for sending signal to MCU module;

The MCU module be connected with optical coupler module, closes the time T2 needed for required time T1 and relay disconnection for meter relay, receives operational order and sends closed/cut-off signal to relay module; When described operational order is closing relay, after the zero signal that the first Light Coupled Device sends being detected, postponing the time that a current electric grid cycle deducts T1 sends closure signal to relay module; When described operational order is off relay, after the zero signal that the second Light Coupled Device sends being detected, postponing the time that a current electric grid cycle deducts T2 sends cut-off signal to relay module;

The relay module be connected with MCU module, for receive that MCU module sends closed/cut-off signal, with this control relay closed/disconnect.

Concrete, as shown in Figure 2, described optical coupler module comprises:

First Light Coupled Device, the first input end of described first Light Coupled Device is connected with live wire L, and the second input is connected with zero line N, the first output head grounding of described first Light Coupled Device, and the second output is connected with the first input end of MCU module;

First protection diode, described first protection diode is connected between the first input end of the first Light Coupled Device and the second input, in parallel with the first Light Coupled Device;

Second Light Coupled Device, the first input end of described second Light Coupled Device is connected with live wire L, and the second input is connected with zero line N, the first output head grounding of described second Light Coupled Device, and the second output is connected with the second input of MCU module;

Second protection diode, described second protection diode is connected between the first input end of the second Light Coupled Device and the second input, in parallel with the second Light Coupled Device.

Concrete, described MCU module comprises three universal input/output interface GPIO; Described universal input/output interface GPIO is interruptable.

Concrete, described relay module comprises:

Relay, described relay comprises pressure sensitivity controller and switch,

Described pressure sensitivity controller one end connects supply power voltage VCC, and the other end is connected with the output of MCU module;

Among the access live wire of described switch;

3rd protection diode, described 3rd protection diode is connected between supply power voltage VCC and the output of MCU module, in parallel with described pressure sensitivity controller.

In the present embodiment; software flow part and the common intelligent switch series products of the system of protection relay are basically identical; system can be tested the closedown of electrical equipment of being adopted as a child and be disconnected required time before dispatching from the factory; and be recorded in MCU module, each perform close and disconnect action time according on method in an embodiment perform.

Present embodiments provide a kind of system of protection relay, comprise optical coupler module, for sending signal to MCU module; The MCU module be connected with optical coupler module, closes the time T2 needed for required time T1 and relay disconnection for meter relay, receives operational order and sends closed/cut-off signal to relay module; When described operational order is closing relay, after the zero signal that the first Light Coupled Device sends being detected, postponing the time that a current electric grid cycle deducts T1 sends closure signal to relay module; When described operational order is off relay, after the zero signal that the second Light Coupled Device sends being detected, postponing the time that a current electric grid cycle deducts T2 sends cut-off signal to relay module; The relay module be connected with MCU module, for receive that MCU module sends closed/cut-off signal, with this control relay closed/disconnect.And make relay in the moment of closed/disconnection, be just in the moment at zero point of civil power, the impulse current that relay is subject to is minimum, to reach protection relay effect, improves the useful life of relay.

It should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.

The above is only the embodiment of the application; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the application's principle; can also make some improvements and modifications, these improvements and modifications also should be considered as the protection range of the application.

Claims (7)

1. a method for protection relay, is characterized in that,
Time T2 needed for time T1 needed for pre-recorded relay closes and relay disconnect;
Receive operational order;
When described operational order is closing relay, after the zero signal that the first Light Coupled Device sends being detected, postponing the time that a current electric grid cycle deducts T1 sends closure signal to relay module;
When described operational order is off relay, after the zero signal that the second Light Coupled Device sends being detected, postponing the time that a current electric grid cycle deducts T2 sends cut-off signal to relay module;
Described zero signal is first zero signal after receiving operational order.
2. method according to claim 1, is characterized in that, described meter relay closes required time T1, comprising:
When first zero signal of the first Light Coupled Device transmission being detected, send closure signal to relay module;
When the optocoupler signal that the second Light Coupled Device sends being detected, calculate when described optocoupler signal being detected and first zero signal that the first Light Coupled Device sends time time difference T1, and record.
3. method according to claim 1, is characterized in that, the time T2 needed for described meter relay disconnects, comprising:
When first zero signal of the second Light Coupled Device transmission being detected, send cut-off signal to relay module;
When the optocoupler blackout that the second Light Coupled Device sends being detected, when calculating optocoupler blackout and the second Light Coupled Device send first zero signal time time difference T2, and record.
4. a system for protection relay, is characterized in that, comprising:
Optical coupler module, for sending signal to MCU module;
The MCU module be connected with optical coupler module, closes the time T2 needed for required time T1 and relay disconnection for meter relay, receives operational order and sends closed/cut-off signal to relay module; When described operational order is closing relay, after the zero signal that the first Light Coupled Device sends being detected, postponing the time that a current electric grid cycle deducts T1 sends closure signal to relay module; When described operational order is off relay, after the zero signal that the second Light Coupled Device sends being detected, postponing the time that a current electric grid cycle deducts T2 sends cut-off signal to relay module;
The relay module be connected with MCU module, for receive that MCU module sends closed/cut-off signal, with this control relay closed/disconnect.
5. system according to claim 4, is characterized in that, described optical coupler module comprises:
First Light Coupled Device, the first input end of described first Light Coupled Device is connected with live wire, and the second input is connected with zero line, the first output head grounding of described first Light Coupled Device, and the second output is connected with the first input end of MCU module;
First protection diode, described first protection diode is connected between the first input end of the first Light Coupled Device and the second input, in parallel with the first Light Coupled Device;
Second Light Coupled Device, the first input end of described second Light Coupled Device is connected with live wire, and the second input is connected with zero line, the first output head grounding of described second Light Coupled Device, and the second output is connected with the second input of MCU module;
Second protection diode, described second protection diode is connected between the first input end of the second Light Coupled Device and the second input, in parallel with the second Light Coupled Device.
6. system according to claim 4, is characterized in that, described MCU module comprises three universal input/output interface GPIO; Described universal input/output interface GPIO is interruptable.
7. system according to claim 4, is characterized in that, described relay module comprises:
Relay, described relay comprises pressure sensitivity controller and switch,
Described pressure sensitivity controller one end connects supply power voltage VCC, and the other end is connected with the output of MCU module;
Among the access live wire of described switch;
3rd protection diode, described 3rd protection diode is connected between supply power voltage VCC and the output of MCU module, in parallel with described pressure sensitivity controller.
CN201510401676.6A 2015-07-09 2015-07-09 A kind of method and system of protective relay CN104934264B (en)

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CN105958433A (en) * 2016-06-30 2016-09-21 北京海尔广科数字技术有限公司 Relay zero-cross detection method and device and relay zero-cross 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
CN107248478A (en) * 2017-07-06 2017-10-13 惠州市元盛科技有限公司 The method and circuit of a kind of protective 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
WO2018188025A1 (en) * 2017-04-13 2018-10-18 深圳和而泰智能控制股份有限公司 Control method for relay, control circuit, and processor
CN109036964A (en) * 2018-08-11 2018-12-18 深圳市健思研科技有限公司 Control method, storage medium, control device and the relay that contact prevents adhesion
CN109585221A (en) * 2018-12-19 2019-04-05 上海西阔电子科技有限公司 A kind of switch arc suppression control method

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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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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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Cited By (9)

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Publication number Priority date Publication date Assignee Title
CN105958433A (en) * 2016-06-30 2016-09-21 北京海尔广科数字技术有限公司 Relay zero-cross detection method and device and relay zero-cross 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
WO2018188025A1 (en) * 2017-04-13 2018-10-18 深圳和而泰智能控制股份有限公司 Control method for relay, control circuit, and processor
CN110506318A (en) * 2017-04-13 2019-11-26 深圳和而泰智能控制股份有限公司 Means of relay controlling, control circuit and processor
CN107248478A (en) * 2017-07-06 2017-10-13 惠州市元盛科技有限公司 The method and circuit of a kind of protective relay
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
CN109036964A (en) * 2018-08-11 2018-12-18 深圳市健思研科技有限公司 Control method, storage medium, control device and the relay that contact prevents adhesion
CN109585221A (en) * 2018-12-19 2019-04-05 上海西阔电子科技有限公司 A kind of switch arc suppression control method

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Address after: 518000 Nanshan Medical Instrument Industrial Park 1019, Nanhai Road, Nanshan District, Shenzhen, Guangdong, A211-A213

Patentee after: Shenzhen Hai Yun new energy Co., Ltd.

Address before: 518000 Nanshan Medical Instrument Industrial Park 1019, Nanhai Road, Nanshan District, Shenzhen, Guangdong, B401-403

Patentee before: SHENZHEN GOLDWEB TECHNOLOGY CO., LTD.