CN103746336B - A kind of Superfast leakage switch and control method thereof - Google Patents
A kind of Superfast leakage switch and control method thereof Download PDFInfo
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Abstract
The invention discloses a kind of Superfast leakage switch and control method thereof, by sealing in ac power electronic switch on transmission line of electricity, the break-make of ac power electronic switch is controlled by intelligence control system, owing to ac power electronic switch is contactless power switch, when generation electric leakage being detected, ac power electronic switch can respond rapidly to turn off, its turn-off time is within 0.2ms, thus limit leakage current within 10mA, its turn-off speed is greatly improved compared with traditional mechanical type leakage switch with safety, can effectively reduce the product of " ampere-second ", reduce the probability of casualties further.
Description
Technical field
The present invention relates to earth leakage circuit-breaker field, particularly a kind of Superfast leakage switch and control method thereof.
Background technology
When there is leaky in various household electrical appliance; the shell of its metal is the most charged; when human body touches charged shell, electric current enters the earth through human body; cause electric shock accidents; current earth leakage circuit-breaker majority is to use mechanical tripping device; having controlled whether output voltage by switching on and off of hard contact, the time of its general action, at about 0.1S, can realize earth leakage protective function substantially.
At present countries in the world power supply be frequency be 50～60Hz, the alternating current of voltage 110V-240V, when the alternating current of this frequency is by body, order about the intracellular ion speed with the frequency back and forth movement of this electric current, just can make its intracellular the most once, make cell be subject to the strongest disturbance and destruction.Meanwhile, the alternating current of this frequency is consistent with the bio electricity rhythm and pace of moving things of body tissue organ again, during by heart, makes myocardial excitability change, causes cardiac muscle fiber to tremble；Also can make cell membrane generation depolarization, cause skeletal muscle generation tetanic contraction, so that electric shock person holds power supply and do not puts, cause electric current to pass through time lengthening, cause death.Experiment proves; the boundary value that human electric shock does not occur ventricular fiber to quiver is 30mA.s; movement time if in mechanical type leakage switch is 0.1S; at leakage current 30mA under the conditions of this; the desired action current value of the RCCB of protecting human body because there is ventricular fibrillation and electrocution, therefore will not be taken as 30mA by human body.
But when actually electrocution conditions occurs, because of individual variation, it is uncontrollable by the size of the electric current of human body and determines；At present earth leakage circuit-breaker disjunction movement time is relatively-stationary, when electric current is bigger, is improved by " ampere-second " product of human body, and electric shock injures and deaths degree increases.Cause ventricular fibrillation required time and current intensity as shown in table 1.
| Current intensity (mA) | Time (s) |
| 70～300 | 5 |
| 200～700 | 1 |
| 300～1600 | 0.3 |
| 500～2500 | 0.1 |
| 1800～8000 | 0.01 |
Table 1
The most maximum break of contact protection earth leakage protective device is with reference to shown in table 2.
Table 2
The maximum break of mediate contact protection earth leakage protective device is with reference to shown in table 3.
Table 3
According to data above, current earth leakage circuit-breaker the most still cannot be completely secured situation about not causing casualties when occurring and getting an electric shock.The electric current easily attractive ventricular fibrillation of 40～160Hz, the injury effect of the alternating current of more than 300Hz reduces, and with its frequency increase and injury effect be gradually lowered.According to this rule; when getting an electric shock; owing to being uncontrollable by the electric current of human body before earth leakage circuit-breaker turns off; and leakage switch from detection electric leakage signal to realize cut off the electricity supply this turn-off time can be by technological means control; therefore it is shortened by the turn-off response time of leakage switch, the purpose of protection can be reached.
Summary of the invention
For solving the problems referred to above; it is an object of the invention to provide that the turn-off time is extremely short, can be effectively improved leakage switch safety; more intelligent than existing earth leakage circuit-breaker, the situation of electric leakage be can effectively judge and a kind of Superfast leakage switch and the control method thereof of prediction scheme implemented.
The present invention solves its problem and be the technical scheme is that
A kind of Superfast leakage switch, including transmission line of electricity, it is provided with electrical apparatus release on described transmission line of electricity, also include ac power electronic switch, described ac power electronic switch seals in the transmission line of electricity at electrical apparatus release place, described ac power electronic switch also includes the control port for controlling its break-make, the detection device for detecting transmission line status it is additionally provided with on described transmission line of electricity, also including an intelligence control system, described intelligence control system is connected with electrical apparatus release, the control port of ac power electronic switch and detection device respectively.
Being further used as above-mentioned a kind of improved procedure, described ac power electronic switch includes that diode D7, D8 and two control switches, two described control switches are connected serially on transmission line of electricity with after diode D7, D8 inverse parallel respectively.
Further, two described control switches are parallel with electric capacity C1, C2 respectively.
Being further used as above-mentioned another kind of improved procedure, described ac power electronic switch includes diode D1, D2, D3, D4 and control switch, and described diode D1, D2, D3, D4 are connected serially on transmission line of electricity after being connected with control switching bridge.
Specifically, it is connected in parallel on the input and the outfan that control switch after described diode D1, D2 and the series connection of diode D3, D4 forward respectively, between described diode D1, D2 and diode D3, D4, is separately provided for the connectivity port sealing on transmission line of electricity.
Being further used as above-mentioned another kind of improved procedure, described ac power electronic switch includes that diode D5, D6 and two control switch, two described control switches connect with diode D5, D6 respectively after again parallel connection seal in transmission line of electricity.
Further, described control is parallel with RCD absorbing circuit on switch.
Further, described control switch is full-control type power electronic semiconductor device.
Specifically, described transmission line of electricity is three-phase and four-line transmission line of electricity, including three phase lines and a zero line, every phase line is provided with electrical apparatus release and ac power electronic switch.
Specifically, described transmission line of electricity is phase three-wire three transmission line of electricity, including three phase lines, every phase line is provided with electrical apparatus release and ac power electronic switch.
Specifically, described transmission line of electricity is single-phase two-stage circuit, including two phase lines, every phase line is provided with electrical apparatus release and ac power electronic switch.
Specifically, described transmission line of electricity is single-phase single-pole circuit, including a phase line and a zero line, described phase line is provided with electrical apparatus release and ac power electronic switch.
Further, the phase line of above-mentioned single-phase single-pole circuit and zero line are provided with electrical apparatus release and ac power electronic switch.
Further, described detection device is zero sequence current mutual inductor.
Further, described intelligence control system is additionally provided with alarm module.
Further, described intelligence control system is additionally provided with power supply context detection module.
A kind of control method of above-mentioned Superfast leakage switch, whether described intelligence control system is by leaking electricity on detection device detection transmission line of electricity, when generation electric leakage being detected, immediately turn off ac power electronic switch, start and confirm electric leakage step, reopen ac power electronic switch, reaffirm whether electric leakage occurs by detection device, when confirming electric leakage, intelligence control system controls ac power electronic switch and electrical apparatus release disconnects transmission line of electricity.
Further, when detect do not leak electricity time, whether intelligence control system transships also by detection device detection transmission line of electricity, when generation overload being detected, immediately turn off ac power electronic switch, start and confirm overload step, reopen ac power electronic switch, reaffirming whether overload occurs by detection device, when confirming overload, intelligence control system controls ac power electronic switch and electrical apparatus release disconnects transmission line of electricity.
Further, when confirming overload, inquiry system is the need of carrying out soft start, if need not, then control ac power electronic switch and electrical apparatus release disconnects transmission line of electricity, if desired, then start soft start step, time delay backed off after random soft start, and judge that transmission line of electricity, whether still in overload, if still transshipping, then controls ac power electronic switch and electrical apparatus release disconnects transmission line of electricity, if circuit has recovered normal, then enter duty.
Further, before whether detection transmission line of electricity leaks electricity, first intelligence control system carries out self-inspection to circuit, when self-inspection is normal, starts ac power electronic switch and connect transmission line of electricity, when self-inspection occurs abnormal, it is held off, carries out reporting to the police and show abnormal situation.
The invention has the beneficial effects as follows:
A kind of Superfast leakage switch that the present invention uses, by sealing in ac power electronic switch on transmission line of electricity, the break-make of ac power electronic switch is controlled by intelligence control system, owing to ac power electronic switch is contactless power switch, there is no mechanical action, when generation electric leakage being detected, ac power electronic switch can respond rapidly to turn off, its turn-off time is within 0.2ms, thus limit leakage current within 10mA, its turn-off speed is greatly improved compared with traditional mechanical type leakage switch with safety, can effectively reduce the product of " ampere-second ", reduce the probability of casualties further.And, ac power electronic switch of the present invention seals in the transmission line of electricity at electrical apparatus release place, when electric leakage, ac power electronic switch turns off rapidly, after confirming electric leakage, ac power electronic switch and electrical apparatus release turn off simultaneously, can be fully disconnected transmission line of electricity owing to machinery turns off, safety is good, can overcome the disadvantages that the shortcoming that ac power electronic switch can not be fully disconnected transmission line of electricity.
The control method of a kind of Superfast leakage switch that the present invention uses, when detecting device and detecting that transmission line of electricity occurs electric leakage, disconnect rapidly AC electrical power electrical switch, electric shock drain current limit within 10mA, just control ac power electronic switch after reaffirming electric leakage and electrical apparatus release simultaneously switches off transmission line of electricity, the control method of the present invention can not only control ac power electronic switch and disconnect rapidly transmission line of electricity, effectively reduce the product of " ampere-second ", reduce the probability of casualties further, and by controlling ac power electronic switch after reaffirming electric leakage and electrical apparatus release turns off simultaneously simultaneously, it is fully disconnected transmission line of electricity, safety is good, can overcome the disadvantages that the shortcoming that ac power electronic switch can not be fully disconnected transmission line of electricity.
Accompanying drawing explanation
The invention will be further described with example below in conjunction with the accompanying drawings.
Fig. 1 is the circuit theory diagrams that the present invention is applied to three-phase and four-line transmission line of electricity；
Fig. 2 is the circuit theory diagrams that the present invention is applied to phase three-wire three transmission line of electricity；
Fig. 3 is the circuit theory diagrams that the present invention is applied to single-phase the two poles of the earth transmission line of electricity；
Fig. 4 is the circuit theory diagrams that the present invention is applied to single-phase single-pole transmission line of electricity；
Fig. 5 is another circuit theory diagrams that the present invention is applied to single-phase single-pole transmission line of electricity；
Fig. 6 is the first embodiment of ac power electronic switch of the present invention；
Fig. 7 is the second embodiment of ac power electronic switch of the present invention；
Fig. 8 is the 3rd embodiment of ac power electronic switch of the present invention；
Fig. 9 is the 4th embodiment of ac power electronic switch of the present invention；
Figure 10 is the 5th embodiment of ac power electronic switch of the present invention；
Figure 11 is the sixth embodiment of ac power electronic switch of the present invention；
Figure 12 is the physical circuit schematic diagram of RCD absorbing circuit of the present invention；
Figure 13 is the detailed description of the invention of ac power electronic switch first embodiment of the present invention；
Figure 14 is the detailed description of the invention of ac power electronic switch the second embodiment of the present invention；
Figure 15 is the detailed description of the invention of ac power electronic switch the 3rd embodiment of the present invention；
Figure 16 is the detailed description of the invention of ac power electronic switch the 4th embodiment of the present invention；
Figure 17 is the detailed description of the invention of ac power electronic switch the 5th embodiment of the present invention；
Figure 18 is the detailed description of the invention of ac power electronic switch sixth embodiment of the present invention；
Figure 19 is the concrete theory diagram of intelligence control system of the present invention；
Figure 20 is the flow chart of the control method of Superfast leakage switch of the present invention.
Detailed description of the invention
With reference to Fig. 1-Figure 19, a kind of Superfast leakage switch of the present invention, including transmission line of electricity, electrical apparatus release 1 it is provided with on described transmission line of electricity, also include ac power electronic switch 2, described ac power electronic switch 2 seals in the transmission line of electricity at electrical apparatus release 1 place, described ac power electronic switch 2 also includes the control port for controlling its break-make, the detection device 3 for detecting transmission line status it is additionally provided with on described transmission line of electricity, specifically, described detection device 3 is zero sequence current mutual inductor, also include an intelligence control system 4, described intelligence control system 4 respectively with electrical apparatus release 1, the control port of ac power electronic switch 2 and detection device 3 connect.
The present invention is by sealing in ac power electronic switch 2 on transmission line of electricity, the break-make of ac power electronic switch 2 is controlled by intelligence control system 4, owing to ac power electronic switch 2 is contactless power switch, there is no mechanical action, when generation electric leakage being detected, ac power electronic switch 2 can respond rapidly to turn off, its turn-off time is within 0.2ms, thus limit leakage current within 10mA, its turn-off speed is greatly improved compared with traditional mechanical type leakage switch with safety, can effectively reduce the product of " ampere-second ", reduce the probability of casualties further.And, ac power electronic switch 2 of the present invention seals in the transmission line of electricity at electrical apparatus release 1 place, when electric leakage, ac power electronic switch 2 turns off rapidly, after confirming electric leakage, ac power electronic switch 2 and electrical apparatus release 1 turn off simultaneously, can be fully disconnected transmission line of electricity owing to machinery turns off, safety is good, can overcome the disadvantages that the shortcoming that ac power electronic switch 2 can not be fully disconnected transmission line of electricity.
With reference to shown in Fig. 6, Fig. 7, first, second embodiment for ac power electronic switch 2 of the present invention, described ac power electronic switch 2 includes that diode D7, D8 and two controls switch S1, S2, described two controls switch S1, S2 are connected serially on transmission line of electricity with after diode D7, D8 inverse parallel respectively.
Specifically, with reference to shown in Figure 13, described two controls switch S1, S2 are respectively gated transistor T5, T6, described diode D7 inverse parallel is on the collector and emitter of gated transistor T5, diode D8 inverse parallel is on the collector and emitter of gated transistor T6, the control port that grid is ac power electronic switch 2 of described gated transistor T5, T6, described gated transistor T5, T6 are connected serially on transmission line of electricity.Specifically, in the present embodiment, the negative electrode of diode D7 and anode are connected in parallel on the collector and emitter of gated transistor T5, the anode of diode D8 and negative electrode are connected in parallel on the emitter and collector of gated transistor T6, and the emitter stage of described gated transistor T5 is connected formation cascaded structure with the emitter stage of gated transistor T6.
With reference to shown in Figure 14, for the detailed description of the invention of ac power electronic switch 2 second embodiment of the present invention, unlike first embodiment, the colelctor electrode of described gated transistor T5 is connected the cascaded structure described in being formed with the colelctor electrode of gated transistor T6.
Further, said two controls to be parallel with electric capacity C1, C2 respectively on switch S1, S2.By arranging electric capacity C1, C2, the instantaneous energy that ac power electronic switch 2 produces when off can be absorbed, prevent under high pressure puncturing control switch simultaneously, circuit is played the effect of protection.
With reference to shown in Fig. 8, the 3rd embodiment for ac power electronic switch 2 of the present invention, described alternating electromotive force electronics 2 switch includes diode D1, D2, D3, D4 and control switch S3, and described diode D1, D2, D3, D4 are connected serially on transmission line of electricity after being connected with control switch S3 bridge-type.It is connected in parallel on the input and the outfan that control switch S3 after the most described diode D1, D2 and the series connection of diode D3, D4 forward respectively, between described diode D1, D2 and diode D3, D4, is separately provided for the connectivity port sealing on transmission line of electricity.
Specifically, with reference to shown in Figure 15, the described switch S3 that controls is gated transistor T1, it is connected in parallel on the collector and emitter of gated transistor T1 after described diode D1, D2 and the series connection of diode D3, D4 forward respectively, the connectivity port sealing on transmission line of electricity it is separately provided for, the control port that grid is ac power electronic switch 2 of described gated transistor T1 between described diode D1, D2 and diode D3, D4.By controlling the base stage of gated transistor T1, the break-make of ac power electronic switch 2 can be controlled.
Shown in reference Fig. 9, Figure 10, Figure 11, the 4th embodiment of ac power electronic switch 2 the most of the present invention, the 5th embodiment and sixth embodiment.
Described ac power electronic switch includes that diode D5, D6 and two control switch S4, S5, two described controls switch S4, S5 connect with diode D5, D6 respectively after again parallel connection seal in transmission line of electricity.
Specifically, with reference to shown in Figure 16, described two controls switch S4, S5 are respectively gated transistor T3, T4, wherein said diode D5, D6 is connected on colelctor electrode or the emitter stage of gated transistor T3, T4 respectively, described gated transistor T3, T4 connect with diode D5, D6 respectively after again reverse parallel connection seal in transmission line of electricity, wherein the grid of gated transistor T3, T4 is the control port of ac power electronic switch 2.
Specifically, in the present embodiment, the negative electrode of diode D5 is connected with the colelctor electrode of gated transistor T3, the anode of diode D6 is connected with the emitter stage of gated transistor T4, the anode of diode D5 and the emitter stage of gated transistor T3 are connected formation parallel-connection structure respectively with the negative electrode of diode D6 and the colelctor electrode of gated transistor T4, described between diode D5, D6, it is respectively provided with the connection branch road sealed in transmission line of electricity between gated transistor T3, T4.
With reference to shown in Figure 17, unlike the 4th embodiment, the negative electrode of described diode D5, D6 colelctor electrode with gated transistor T3, T4 respectively is connected, the emitter stage of gated transistor T3, the anode of diode D5 are connected formation parallel-connection structure respectively with the anode of diode D6 and the emitter stage of gated transistor T4, between described gated transistor T3 emitter stage and the anode of diode D6, it is respectively provided with, between anode and the emitter stage of gated transistor T4 of diode D5, the connection branch road sealed in transmission line of electricity.
With reference to shown in Figure 18, unlike the four, the 5th embodiments, the anode of described diode D5, D6 emitter stage with gated transistor T3, T4 respectively is connected, the colelctor electrode of gated transistor T3, the negative electrode of diode D5 are connected formation parallel-connection structure respectively with the negative electrode of diode D6 and the colelctor electrode of gated transistor T4, between colelctor electrode and the negative electrode of diode D6 of described gated transistor T3, it is respectively provided with, between negative electrode and the colelctor electrode of gated transistor T4 of diode D5, the connection branch road sealed in transmission line of electricity.
It should be noted that the control switch in above-described embodiment is gated transistor (IGBT), preferred embodiment the most of the present utility model, wherein control switch and can also use the full-control type power electronic semiconductor device such as field effect transistor.
Further, the switch of the control in above-described embodiment three to embodiment six is parallel with RCD absorbing circuit.With reference to shown in Figure 12, described RCD absorbing circuit includes that diode D0, resistance R0 and electric capacity C0, described diode D0 connect with electric capacity C0 after resistance R0 parallel connection.By arranging RCD absorbing circuit, the rate of climb of voltage when power tube turns off can be slowed down, reduce turn-off power loss, improve the stability of circuit.
The present invention is applicable to different transmission line of electricity, and with reference to shown in Fig. 1, described transmission line of electricity is three-phase and four-line transmission line of electricity, including three phase lines L1, L2, L3 and a zero line N, every phase line is provided with electrical apparatus release 1 and ac power electronic switch 2.
With reference to shown in Fig. 2, described transmission line of electricity is three-phase and four-line transmission line of electricity, including three phase lines L1, L2, L3, every phase line is provided with electrical apparatus release 1 and ac power electronic switch 2.
With reference to shown in Fig. 3, described transmission line of electricity is single-phase two-stage circuit, including two phase lines L1, L2, every phase line is provided with electrical apparatus release 1 and ac power electronic switch 2.
With reference to shown in Fig. 4, described transmission line of electricity is single-phase single-pole circuit, including phase line L1 and a zero line N, described phase line L1 is provided with electrical apparatus release 1 and ac power electronic switch 2.
With further reference to shown in Fig. 5, phase line L1 of above-mentioned single-phase single-pole circuit and zero line N are provided with electrical apparatus release 1 and ac power electronic switch 2.
With reference to shown in Figure 19, system principle diagram for intelligence control system 4, described intelligence control system 4 includes power supply, single-chip microcomputer and program, network, detection of electrical leakage amplification module, overload detection module, the circuit such as electron electric power switch driving circuit and electrical apparatus release shunt opening coil drive, described detection of electrical leakage amplification module and overload detection amplification module receive electric leakage signal and the overload signal of self-test device 3 respectively, transmit after treatment to single-chip microcomputer, by Single-chip Controlling Electrical switch driving circuit and electrical apparatus release shunt opening coil driver output drive signal, thus control electron electric power switch and electrical apparatus release.
Further, described intelligence control system 4 is additionally provided with power supply context detection module.
Further, described intelligence control system 4 is additionally provided with alarm module.When electric leakage, overload occurs in transmission line of electricity, or when leakage switch breaks down, can be reported to the police by alarm module.
Further, described single-chip microcomputer is also associated with network-bus, can be transmitted by network by the signal of leakage switch by network-bus, thus realizes network monitoring and remotely control.
The control method of a kind of Superfast leakage switch, it is characterised in that comprise the following steps:
Whether described intelligence control system 4 is detected by detection device 3 leaks electricity on transmission line of electricity, when generation electric leakage being detected, immediately turn off ac power electronic switch 2, start and confirm electric leakage step, reopen ac power electronic switch 2, reaffirming whether electric leakage occurs by detection device 3, when confirming electric leakage, intelligence control system 4 controls ac power electronic switch 2 and electrical apparatus release 1 disconnects transmission line of electricity.Use above-mentioned control method, when detecting device 3 and detecting that transmission line of electricity breaks down, disconnect rapidly AC electrical power electrical switch 2, electric shock drain current limit within 10mA, just control ac power electronic switch 2 after reaffirming electric leakage and electrical apparatus release 1 simultaneously switches off transmission line of electricity, the control method of the present invention can not only control alternating electromotive force electronics 2 and switch and disconnect rapidly transmission line of electricity, effectively reduce the product of " ampere-second ", reduce the probability of casualties further, and turn off by controlling ac power electronic switch 2 and electrical apparatus release 1 after reaffirming electric leakage simultaneously simultaneously, it is fully disconnected transmission line of electricity, safety is good, can overcome the disadvantages that the shortcoming that ac power electronic switch can not be fully disconnected transmission line of electricity.
Further, described confirmation electric leakage step is specific as follows, when detecting device 3 and detecting generation electric leakage on transmission line of electricity, first ac power electronic switch 2 is immediately turned off, confirm after power-off, through N(N >=0) after individual sinusoidal cycle, it is again turned on ac power electronic switch 2, again leakage condition is detected, if confirming not electric leakage, then normal power-up, continue detection leakage condition, if confirming electric leakage, then control ac power electronic switch 2 and electrical apparatus release 1 disconnects transmission line of electricity.When there is electric leakage, first disconnecting ac power electronic switch 2 and guaranteeing safety, when confirming really to leak electricity, just simultaneously switching off ac power electronic switch 2 and electrical apparatus release 1, be fully disconnected transmission line of electricity, safety is good.
Further, when detect do not leak electricity time, also by detection device 3, intelligence control system 4 detects whether transmission line of electricity transships, when generation overload being detected, immediately turn off ac power electronic switch 2, start and confirm overload step, reopen ac power electronic switch 2, reaffirming whether overload occurs by detection device 3, when confirming overload, intelligence control system 4 controls ac power electronic switch 2 and electrical apparatus release 1 disconnects transmission line of electricity.The present invention processes outside detecting electric leakage, whether also detection transmission line of electricity transships, not only its function is more perfect, safety is more preferable, and also use, owing to judging whether to transship, the method being confirmed whether overload, reaffirm that overload just controls ac power electronic switch 2 after the most really occurring and electrical apparatus release 1 disconnects transmission line of electricity, the interference due to transmission line of electricity can be prevented and false triggering power-off, improve leakage switch stability and accuracy.
Further, described confirmation overload step is specific as follows, when detection device 3 detects and transships (electronic power switch pressure drop is more than setting value) on transmission line of electricity, first ac power electronic switch 2 is immediately turned off, after confirming power-off, through N(N ＞ 0) zero crossing after individual sine wave, it is again turned on ac power electronic switch 2, again load condition is detected, if confirming not overload, then normal power-up, continue properly functioning, if confirming overload, then control ac power electronic switch 2 and electrical apparatus release 1 disconnects transmission line of electricity.When the overload occurs, first disconnecting ac power electronic switch 2 and guarantee safety, when confirming really to transship, just simultaneously switch off ac power electronic switch 2 and electrical apparatus release 1, be fully disconnected transmission line of electricity, safety is good.
Further, before whether detection transmission line of electricity leaks electricity, first intelligence control system 4 carries out self-inspection to circuit, when self-inspection is normal, start ac power electronic switch 2 and connect transmission line of electricity, and continue timing cycle self-inspection, when self-inspection occurs abnormal, turn off electronic power switch 2, carry out reporting to the police and show abnormal situation.Before leakage switch works, first carry out self-inspection, can confirm that current leakage switch is safe, prevent from, because employing the leakage switch of fault, security incident occurs.
When some electrical appliance starts, bigger starting current can be produced, when electric current exceedes, system can be judged as overload, disconnect ac power electronic switch 2 and electrical apparatus release 1, but for some electricity consumption device, during startup, needs buffering course electric current the most repeatedly just can reach stable normal condition, therefore, for those electrical appliances, need to carry out soft start, i.e. when electric current reaches certain value (this value is less than overload values), disconnect transmission line of electricity, and reopen transmission line of electricity, allow the electric current of electricity consumption device reach stably normal state by the continuous break-make of transmission line of electricity.
Therefore, under single or single loading condition, when confirming overload, inquiry system is the need of carrying out soft start, if need not, then control ac power electronic switch 2 and electrical apparatus release 1 disconnects transmission line of electricity, if desired, then start soft start step, supervisory circuit state simultaneously, time delay backed off after random soft start, and detect judge transmission line of electricity whether still in overload, if still transshipping, then control ac power electronic switch and electrical apparatus release disconnects transmission line of electricity, if after time delay, circuit exits overload, then system recovery normal power supply.
With reference to shown in Figure 20, the control method of Superfast leakage switch of the present invention is specific as follows:
B1: to intelligence control system 4 and leakage switch electrification reset.
B2: intelligence control system 4 carries out self-inspection.
B3: judge that system is the most normal, if normally, performs step B4, if abnormal, then turn off electronic power switch 2 and reports to the police, then performing step B2.
B4: open ac power electronic switch 2, and continue timing cycle self-inspection.
B5: whether detection transmission line of electricity leaks electricity, if normally, then performs step B9, if electric leakage, then performs step B6.
B6: turn off ac power electronic switch 2.
B7: reopen electronic power switch after time delay.
B8: starting and confirm electric leakage step, whether detection transmission line of electricity leaks electricity again, if normally, then performs step B5, if electric leakage, then performs step B9.
B9: turn off electronic power switch 2 and and turn off electrical apparatus release 1 electric leakage of reporting to the police.
B10: confirm to give tacit consent to basic leakage current value.
B11: whether detection transmission line of electricity transships, if normally, performs step B5, if overload, performs step B12.
B12: turn off electronic power switch 2.
B13: reopen electronic power switch after time delay.
B14: starting and confirm overload step, whether detection transmission line of electricity transships again, if normally, then performs step B5, if overload, then performs step B15.
B15: inquiry system is the need of soft start, if desired, then perform step B16, if need not, then performs step B18.
B16: start soft start.
B17: time delay also exits soft start, and whether detection transmission line of electricity transships again, if normally, then performs step B5, if overload, then performs step B18.
B18: turn off ac power electronic switch 2 and turn off electrical apparatus release 1 overload of reporting to the police.
The above, simply presently preferred embodiments of the present invention, the invention is not limited in above-mentioned embodiment, as long as it reaches the technique effect of the present invention with identical means, all should belong to protection scope of the present invention.
Claims (10)
1. a Superfast leakage switch, it is characterized in that: include transmission line of electricity, it is provided with electrical apparatus release on described transmission line of electricity, also include ac power electronic switch, described ac power electronic switch seals in the transmission line of electricity at electrical apparatus release place, described ac power electronic switch also includes the control port for controlling its break-make, the detection device for detecting transmission line status it is additionally provided with on described transmission line of electricity, also include an intelligence control system, described intelligence control system respectively with electrical apparatus release, the control port of ac power electronic switch and detection device connect, when electric leakage, ac power electronic switch turns off rapidly, after confirming electric leakage, ac power electronic switch and electrical apparatus release turn off simultaneously.
A kind of Superfast leakage switch the most according to claim 1, it is characterized in that: described ac power electronic switch includes that diode D7, D8 and two control switches, two described control switches are connected serially on transmission line of electricity with after diode D7, D8 inverse parallel respectively.
A kind of Superfast leakage switch the most according to claim 2, it is characterised in that: two described control switches are parallel with electric capacity C1, C2 respectively.
A kind of Superfast leakage switch the most according to claim 1, it is characterized in that: described ac power electronic switch includes diode D1, D2, D3, D4 and control switch, and described diode D1, D2, D3, D4 are connected serially on transmission line of electricity after being connected with control switching bridge.
A kind of Superfast leakage switch the most according to claim 1, it is characterized in that: described ac power electronic switch includes that diode D5, D6 and two control switch, two described control switches connect with diode D5, D6 respectively after again parallel connection seal in transmission line of electricity.
6. according to the arbitrary described a kind of Superfast leakage switch of claim 2 to 5, it is characterised in that: described control switch is full-control type power electronic semiconductor device.
7. the control method of the arbitrary described Superfast leakage switch of claim 1 to 5, it is characterized in that: whether described intelligence control system is by leaking electricity on detection device detection transmission line of electricity, when generation electric leakage being detected, immediately turn off ac power electronic switch, start and confirm electric leakage step, reopen ac power electronic switch, reaffirm whether electric leakage occurs by detection device, when confirming electric leakage, intelligence control system controls ac power electronic switch and electrical apparatus release disconnects transmission line of electricity.
The control method of a kind of Superfast leakage switch the most according to claim 7, it is characterized in that: when detect do not leak electricity time, whether intelligence control system transships also by detection device detection transmission line of electricity, when generation overload being detected, immediately turn off ac power electronic switch, start and confirm overload step, reopen ac power electronic switch, reaffirm whether overload occurs by detection device, when confirming overload, intelligence control system controls ac power electronic switch and electrical apparatus release disconnects transmission line of electricity, if transmission line of electricity has recovered normal, then enter duty.
The control method of a kind of Superfast leakage switch belonging to the most according to Claim 8, it is characterized in that: when confirming overload, inquiry intelligence control system is the need of carrying out soft start, if need not, then controls ac power electronic switch and electrical apparatus release disconnects transmission line of electricity, if desired, then start soft start step, time delay backed off after random soft start, and judge that whether transmission line of electricity is still in overload, if still transshipping, then control ac power electronic switch and electrical apparatus release disconnects transmission line of electricity.
The control method of a kind of Superfast leakage switch belonging to the most according to Claim 8, it is characterized in that: before whether detection transmission line of electricity leaks electricity, first intelligence control system carries out self-inspection to circuit, when self-inspection is normal, start ac power electronic switch and connect transmission line of electricity, when self-inspection occurs abnormal, it is held off, carries out reporting to the police and show abnormal situation.
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| CN103986138B (en) * | 2014-05-14 | 2017-01-25 | 国家电网公司 | Modularized current-limiting breaker power module |
| CN111380229B (en) * | 2020-03-19 | 2022-05-06 | 中山市乐喜电子科技有限公司 | Control method and control device of water heater system |
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