CN103746336A - Superfast leakage switch and control method thereof - Google Patents
Superfast leakage switch and control method thereof Download PDFInfo
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- CN103746336A CN103746336A CN201310686068.5A CN201310686068A CN103746336A CN 103746336 A CN103746336 A CN 103746336A CN 201310686068 A CN201310686068 A CN 201310686068A CN 103746336 A CN103746336 A CN 103746336A
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Abstract
The invention discloses a superfast leakage switch and a control method thereof. An alternating-current power electronic switch is connected in series to a power transmission line, and an intelligent control system controls on/off of the alternating-current power electronic switch. As the alternating-current power electronic switch is a non-contact power switch, the alternating-current power electronic switch can quickly respond and be turned off when leakage is detected. The turn-off time is within 0.2ms so that the leakage current is limited within 10mA. Compared with a traditional mechanical leakage switch, the turn-off speed and safety of the superfast leakage switch are greatly improved, the product of 'ampere-second' can be effectively reduced, and the probability of casualties can be further reduced.
Description
Technical field
The present invention relates to earth leakage circuit-breaker field, particularly a kind of supper-fast leakage switch and control method thereof.
Background technology
While there is leaky in various household electrical appliance; the shell of its metal is easily 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 adopt mechanical tripping device; that leans on hard contact switches on and off to control whether have output voltage, and time of its general action, in 0.1S left and right, can be realized earth leakage protective function substantially.
Countries in the world power supply is that frequency is 50～60Hz at present, the alternating current of voltage 110V-240V, when the alternating current of this frequency passes through body, order about intracellular ion with the speed of the frequency back and forth movement of this electric current, just in time can make its in cell back and forth once, make cell be subject to the strongest disturbance and destruction.Meanwhile, the alternating current of this frequency conforms to the bioelectricity rhythm and pace of moving things of body tissue organ again, during by heart, myocardial excitability is changed, and causes cardiac muscle fibre vibration; Also can make cell membrane generation depolarising, cause that skeletal muscle tetanic property occurs and shrinks, so that electric shock person holds power supply and do not put, cause electric current to pass through time lengthening, cause death.Experimental results show that; the boundary value that ventricle fiber quivers does not occur human electric shock is 30mA.s; if be 0.1S in the operate time of mechanical type leakage switch; under this condition of leakage current 30mA; human body can be because ventricular fibrillation electrocution occurs, therefore the desired action current value of the residual current circuit breaker that protecting human body is used is taken as 30mA.
But when in fact electric shock situation occurs, because of individual difference, the size of the electric current by human body is uncontrollable and definite; At present earth leakage circuit-breaker disjunction operate time is relatively-stationary, and when electric current is larger, " ampere-second " product by human body improves, and electric shock injures and deaths degree increases.Cause that ventricular fibrillation required time and current strength are as shown in table 1.
| Current strength (mA) | Time (s) |
| 70～300 | 5 |
| 200～700 | 1 |
| 300～1600 | 0.3 |
| 500～2500 | 0.1 |
| 1800～8000 | 0.01 |
Table 1
Directly contact protection uses the maximum break-time of earth leakage protective device with reference to shown in table 2 at present.
Table 2
Indirect contact protection uses the maximum break-time of earth leakage protective device with reference to shown in table 3.
Table 3
According to above data, current earth leakage circuit-breaker still cannot guarantee situation about not causing casualties when occurring getting an electric shock technically completely.The electric current of 40～160Hz the most easily causes ventricular fibrillation, and the injury effect of alternating current more than 300Hz reduces, and with its frequency increase and injury effect reduce gradually.According to this rule; when getting an electric shock; because the electric current by human body before earth leakage circuit-breaker turn-offs is uncontrollable; and leakage switch can be controlled by technological means to realization this turn-off time of cutting off the electricity supply from detecting electric leakage signal; therefore by shortening the turn-off response time of leakage switch, can reach the object of protection.
Summary of the invention
For addressing the above problem; the object of the present invention is to provide the turn-off time extremely short, can effectively improve leakage switch fail safe; more intelligent than existing earth leakage circuit-breaker, can effectively judge the situation of electric leakage and a kind of supper-fast leakage switch and the control method thereof of enforcement prediction scheme.
The present invention solves the technical scheme that its problem adopts:
A kind of supper-fast leakage switch, comprise transmission line, on described transmission line, be provided with release, also comprise ac power electronic switch, described ac power electronic switch seals in to the transmission line at release place, described ac power electronic switch also comprises for controlling the control port of its break-make, on described transmission line, be also provided with the checkout gear for detection of transmission line status, also comprise an intelligent control system, described intelligent control system is connected with checkout gear with the control port of release, ac power electronic switch respectively.
Be further used as above-mentioned a kind of improved procedure, described ac power electronic switch comprises diode D7, D8 and two control switchs, and two described control switchs are connected serially on transmission line respectively with after diode D7, D8 inverse parallel.
Further, two described control switchs are parallel with respectively capacitor C 1, C2.
Be further used as above-mentioned another kind of improved procedure, described ac power electronic switch comprises diode D1, D2, D3, D4 and control switch, and described diode D1, D2, D3, D4 are connected serially on transmission line after being connected with control switch bridge-type.
Particularly, described diode D1, D2 and diode D3, D4 are connected in parallel on the input and output of control switch after forward series connection respectively, between described diode D1, D2 and diode D3, D4, are respectively arranged with for sealing in the connectivity port on transmission line.
Be further used as above-mentioned another kind of improved procedure, described ac power electronic switch comprises diode D5, D6 and two control switchs, two described control switchs after connecting with diode D5, D6 respectively again parallel connection seal in to transmission line.
Further, on described control switch, be parallel with RCD absorbing circuit.
Further, described control switch is full-control type power electronic semiconductor device.
Particularly, described transmission line is three-phase and four-line transmission line, comprises three phase lines and a zero line, is provided with release and ac power electronic switch in every phase line.
Particularly, described transmission line is phase three-wire three transmission line, comprises three phase lines, is provided with release and ac power electronic switch in every phase line.
Particularly, described transmission line is single-phase two-stage circuit, comprises two phase lines, is provided with release and ac power electronic switch in every phase line.
Particularly, described transmission line is single-phase monopolar line, comprises a phase line and a zero line, is provided with release and ac power electronic switch in described phase line.
Further, on the phase line of above-mentioned single-phase monopolar line and zero line, be provided with release and ac power electronic switch.
Further, described checkout gear is zero sequence current mutual inductor.
Further, in described intelligent control system, be also provided with alarm module.
Further, in described intelligent control system, be also provided with power supply environment detection module.
A kind of control method of above-mentioned supper-fast leakage switch, whether described intelligent control system is detected on transmission line and is leaked electricity by checkout gear, when generation electric leakage being detected, turn-off immediately ac power electronic switch, start and confirm electric leakage step, reopen ac power electronic switch, by checkout gear, reaffirm whether electric leakage occurs, when confirming electric leakage, intelligent control system controls ac power electronic switch and release disconnects transmission line.
Further, when detecting while not leaking electricity, whether intelligent control system also detects transmission line by checkout gear and transships, when generation overload being detected, turn-off immediately ac power electronic switch, start and confirm overload step, reopen ac power electronic switch, by checkout gear, reaffirm whether overload occurs, when confirming overload, intelligent control system controls ac power electronic switch and release disconnects transmission line.
Further, when confirming overload, whether inquiry system needs to carry out soft start, if do not need, control ac power electronic switch and release and disconnect transmission line, if desired, start soft start step, time delay backed off after random soft start, and judge that whether transmission line is still in overload, if still transship, control ac power electronic switch and release and disconnect transmission line, if circuit has recovered normally, to enter operating state.
Further, before whether detection transmission line leaks electricity, first intelligent control system carries out self check to circuit, when self check is normal, starts ac power electronic switch and connect transmission line, when self check occurs when abnormal, keep off state, report to the police and show abnormal situation.
The invention has the beneficial effects as follows:
A kind of supper-fast leakage switch that the present invention adopts, by seal in ac power electronic switch on transmission line, by intelligent control system, control the break-make of ac power electronic switch, because 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 shutoff, its turn-off time is in 0.2ms, thereby limit leakage current is in 10mA, its turn-off speed is compared with traditional mechanical type leakage switch with fail safe greatly and is improved, can effectively reduce the product of " ampere-second ", further reduce the probability of casualties.And, ac power electronic switch of the present invention seals in to the transmission line at release place, when electric leakage, ac power electronic switch turn-offs rapidly, confirm that after electric leakage, ac power electronic switch and release turn-off simultaneously, because machinery turn-offs, can disconnect transmission line completely, fail safe is good, can make up the shortcoming that ac power electronic switch can not disconnect transmission line completely.
The control method of a kind of supper-fast leakage switch that the present invention adopts, when checkout gear detects transmission line generation electric leakage, disconnect rapidly alternating current electronic power switch, electric shock leakage current is limited in 10mA, reaffirm and just control ac power electronic switch after electric leakage and release disconnects transmission line simultaneously, control method of the present invention can not only be controlled ac power electronic switch and disconnect rapidly transmission line, effectively reduce the product of " ampere-second ", further reduce the probability of casualties, and control ac power electronic switch after electric leakage and release turn-offs simultaneously by reaffirming simultaneously, disconnect transmission line completely, fail safe is good, can make up the shortcoming that ac power electronic switch can not disconnect transmission line completely.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and example, the invention will be further described.
Fig. 1 is the circuit theory diagrams that the present invention is applied to three-phase and four-line transmission line;
Fig. 2 is the circuit theory diagrams that the present invention is applied to phase three-wire three transmission line;
Fig. 3 is the circuit theory diagrams that the present invention is applied to single-phase the two poles of the earth transmission line;
Fig. 4 is the circuit theory diagrams that the present invention is applied to single-phase one pole transmission line;
Fig. 5 is another circuit theory diagrams that the present invention is applied to single-phase one pole transmission line;
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 6th 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 embodiment of ac power electronic switch the first embodiment of the present invention;
Figure 14 is the embodiment of ac power electronic switch the second embodiment of the present invention;
Figure 15 is the embodiment of ac power electronic switch of the present invention the 3rd embodiment;
Figure 16 is the embodiment of ac power electronic switch of the present invention the 4th embodiment;
Figure 17 is the embodiment of ac power electronic switch of the present invention the 5th embodiment;
Figure 18 is the embodiment of ac power electronic switch of the present invention the 6th embodiment;
Figure 19 is the concrete theory diagram of intelligent control system of the present invention;
Figure 20 is the flow chart of the control method of the supper-fast leakage switch of the present invention.
Embodiment
With reference to Fig. 1-Figure 19, a kind of supper-fast leakage switch of the present invention, comprise transmission line, on described transmission line, be provided with release 1, also comprise ac power electronic switch 2, described ac power electronic switch 2 seals in to the transmission line at release 1 place, described ac power electronic switch 2 also comprises for controlling the control port of its break-make, on described transmission line, be also provided with the checkout gear 3 for detection of transmission line status, particularly, described checkout gear 3 is zero sequence current mutual inductor, also comprise an intelligent control system 4, described intelligent control system 4 respectively with release 1, the control port of ac power electronic switch 2 is connected with checkout gear 3.
The present invention by sealing in ac power electronic switch 2 on transmission line, by intelligent control system 4, control the break-make of ac power electronic switch 2, because ac power electronic switch 2 is contactless power switches, there is no mechanical action, when generation electric leakage being detected, ac power electronic switch 2 can respond rapidly shutoff, its turn-off time is in 0.2ms, thereby limit leakage current is in 10mA, its turn-off speed is compared with traditional mechanical type leakage switch with fail safe greatly and is improved, can effectively reduce the product of " ampere-second ", further reduce the probability of casualties.And, ac power electronic switch 2 of the present invention seals in to the transmission line at release 1 place, when electric leakage, ac power electronic switch 2 turn-offs rapidly, confirm that after electric leakage, ac power electronic switch 2 and release 1 turn-off simultaneously, because machinery turn-offs, can disconnect transmission line completely, fail safe is good, can make up the shortcoming that ac power electronic switch 2 can not disconnect transmission line completely.
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 comprises diode D7, D8 and two control switch S1, S2, and described two control switch S1, S2 are connected serially on transmission line respectively with after diode D7, D8 inverse parallel.
Particularly, shown in Figure 13, described two control 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 grid of described gated transistor T5, T6 is the control port of ac power electronic switch 2, and described gated transistor T5, T6 are connected serially on transmission line.Particularly, 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 of the emitter of described gated transistor T5 and gated transistor T6 is connected to form cascaded structure.
Shown in Figure 14, for the embodiment of ac power electronic switch 2 second embodiment of the present invention, different from the first embodiment, the collector electrode of the collector electrode of described gated transistor T5 and gated transistor T6 is connected to form described cascaded structure.
Further, on described two control switch S1, S2, be parallel with respectively capacitor C 1, C2.By capacitor C 1, C2 are set, can absorb the instantaneous energy that ac power electronic switch 2 produces when turn-offing, prevent under high pressure puncturing control switch simultaneously, circuit is played to the effect of protection.
Shown in Fig. 8, the 3rd embodiment for ac power electronic switch 2 of the present invention, described alternating electromotive force electronics 2 switches comprise diode D1, D2, D3, D4 and control switch S3, and described diode D1, D2, D3, D4 are connected serially on transmission line after being connected with control switch S3 bridge-type.Be that described diode D1, D2 and diode D3, D4 are connected in parallel on the input and output of control switch S3 after forward series connection respectively, between described diode D1, D2 and diode D3, D4, be respectively arranged with for sealing in the connectivity port on transmission line.
Particularly, shown in Figure 15, described control switch S3 is gated transistor T1, described diode D1, D2 and diode D3, D4 are connected in parallel on the collector and emitter of gated transistor T1 after forward series connection respectively, between described diode D1, D2 and diode D3, D4, be respectively arranged with for sealing in the connectivity port on transmission line, the grid of described gated transistor T1 is the control port of ac power electronic switch 2.By controlling the base stage of gated transistor T1, can control the break-make of ac power electronic switch 2.
Shown in Fig. 9, Figure 10, Figure 11, be respectively the 4th embodiment, the 5th embodiment and the 6th embodiment of ac power electronic switch 2 of the present invention.
Described ac power electronic switch comprises diode D5, D6 and two control switch S4, S5, two described control switch S4, S5 after connecting with diode D5, D6 respectively again parallel connection seal in to transmission line.
Particularly, shown in Figure 16, described two control switch S4, S5 are respectively gated transistor T3, T4, wherein said diode D5, D6 are connected on respectively on the collector electrode or emitter of gated transistor T3, T4, described gated transistor T3, T4 after connecting with diode D5, D6 respectively again reverse parallel connection seal in to transmission line, wherein the grid of gated transistor T3, T4 is the control port of ac power electronic switch 2.
Particularly, in the present embodiment, the negative electrode of diode D5 is connected with the collector electrode of gated transistor T3, the anode of diode D6 is connected with the emitter of gated transistor T4, the emitter of the anode of diode D5 and gated transistor T3 is connected to form parallel-connection structure with the negative electrode of diode D6 and the collector electrode of gated transistor T4 respectively, between described diode D5, D6, between gated transistor T3, T4, be respectively equipped with for sealing in to the connection branch road on transmission line.
Shown in Figure 17, different from the 4th embodiment is, the negative electrode of described diode D5, D6 is connected with the collector electrode of gated transistor T3, T4 respectively, the anode of the emitter of gated transistor T3, diode D5 is connected to form parallel-connection structure with the anode of diode D6 and the emitter of gated transistor T4 respectively, between described gated transistor T3 emitter and the anode of diode D6, between the emitter of the anode of diode D5 and gated transistor T4, be respectively equipped with for sealing in to the branch road that is connected on transmission line.
Shown in Figure 18, different from the 4th, the 5th embodiment is, the anode of described diode D5, D6 is connected with the emitter of gated transistor T3, T4 respectively, the negative electrode of the collector electrode of gated transistor T3, diode D5 is connected to form parallel-connection structure with the negative electrode of diode D6 and the collector electrode of gated transistor T4 respectively, between the negative electrode of the collector electrode of described gated transistor T3 and diode D6, between the collector electrode of the negative electrode of diode D5 and gated transistor T4, be respectively equipped with for sealing in to the branch road that is connected on transmission line.
It should be noted that the control switch in above-described embodiment is gated transistor (IGBT), is preferred embodiment of the present utility model, and wherein control switch also can adopt the full-control type power electronic semiconductor device such as field effect transistor.
Further, on the control switch in above-described embodiment three to embodiment six, be parallel with RCD absorbing circuit.Shown in Figure 12, described RCD absorbing circuit comprises diode D0, resistance R 0 and capacitor C 0, after described diode D0 is in parallel with resistance R 0, connects with capacitor C 0.By RCD absorbing circuit is set, in the time of slowing down power tube shutoff, the rate of climb of voltage, reduces turn-off power loss, improves the stability of circuit.
The present invention is applicable to different transmission lines, and shown in Fig. 1, described transmission line is three-phase and four-line transmission line, comprises three phase line L1, L2, L3 and a zero line N, is provided with release 1 and ac power electronic switch 2 in every phase line.
Shown in Fig. 2, described transmission line is three-phase and four-line transmission line, comprises three phase line L1, L2, L3, is provided with release 1 and ac power electronic switch 2 in every phase line.
Shown in Fig. 3, described transmission line is single-phase two-stage circuit, comprises two phase line L1, L2, is provided with release 1 and ac power electronic switch 2 in every phase line.
Shown in Fig. 4, described transmission line is single-phase monopolar line, comprises a phase line L1 and a zero line N, is provided with release 1 and ac power electronic switch 2 on described phase line L1.
Shown in Fig. 5, on the phase line L1 of above-mentioned single-phase monopolar line and zero line N, be provided with release 1 and ac power electronic switch 2.
Shown in Figure 19, system principle diagram for intelligent control system 4, described intelligent control system 4 comprises 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 release shunt opening coil drive, described detection of electrical leakage amplification module and overload detection amplification module receive respectively electric leakage signal and the overload signal of self-test device 3, transfer to after treatment single-chip microcomputer, by Single-chip Controlling electric power power switch drive circuit and release shunt opening coil driver output drive signal, thereby control electron electric power switch and release.
Further, in described intelligent control system 4, be also provided with power supply environment detection module.
Further, in described intelligent control system 4, be also provided with alarm module.When electric leakage, overload appear in transmission line, or leakage switch is when break down, and can report to the police by alarm module.
Further, described single-chip microcomputer is also connected with network-bus, the signal of leakage switch can be transmitted by network, thereby realize network monitoring and Long-distance Control by network-bus.
A control method for supper-fast leakage switch, is characterized in that comprising the following steps:
Whether described intelligent control system 4 is detected on transmission line and is leaked electricity by checkout gear 3, when generation electric leakage being detected, turn-off immediately ac power electronic switch 2, start and confirm electric leakage step, reopen ac power electronic switch 2, by checkout gear 3, reaffirm whether electric leakage occurs, when confirming electric leakage, intelligent control system 4 controls ac power electronic switch 2 and release 1 disconnects transmission line.Adopt above-mentioned control method, when checkout gear 3 detects transmission line and breaks down, disconnect rapidly alternating current electronic power switch 2, electric shock leakage current is limited in 10mA, reaffirm and just control ac power electronic switch 2 after electric leakage and release 1 disconnects transmission line simultaneously, control method of the present invention can not only be controlled alternating electromotive force electronics 2 switches and disconnect rapidly transmission line, effectively reduce the product of " ampere-second ", further reduce the probability of casualties, and control ac power electronic switch 2 after electric leakage and release 1 turn-offs simultaneously by reaffirming simultaneously, disconnect transmission line completely, fail safe is good, can make up the shortcoming that ac power electronic switch can not disconnect transmission line completely.
Further, described confirmation electric leakage step is specific as follows, while there is electric leakage on checkout gear 3 detection transmission lines, first immediately turn-off ac power electronic switch 2, confirm after power-off, through N(N >=0) after individual sinusoidal cycle, again open ac power electronic switch 2, again detect electric leakage state, if confirm not electric leakage, normal power-up, continues to detect electric leakage state, if confirm electric leakage, control ac power electronic switch 2 and release 1 disconnection transmission line.When there is electric leakage, first disconnect ac power electronic switch 2 and guarantee safety, while confirming electric leakage really, just disconnect ac power electronic switch 2 and release 1 simultaneously, disconnect transmission line completely, fail safe is good.
Further, when detecting while not leaking electricity, whether intelligent control system 4 also detects transmission line by checkout gear 3 and transships, when generation overload being detected, turn-off immediately ac power electronic switch 2, start and confirm overload step, reopen ac power electronic switch 2, by checkout gear 3, reaffirm whether overload occurs, when confirming overload, intelligent control system 4 controls ac power electronic switch 2 and release 1 disconnects transmission line.Outside the present invention processes electric leakage is detected, whether also detect transmission line transships, not only its more perfect function, fail safe are better, and owing to judging whether that overload has also adopted the method that is confirmed whether overload, reaffirm whether really overload just controls ac power electronic switch 2 and release 1 disconnection transmission line after generation, the false triggering power-off due to the interference of transmission line be can prevent, leakage switch stability and accuracy improved.
Further, described confirmation overload step is specific as follows, while transshipping (electronic power switch pressure drop is greater than set point) on checkout gear 3 detection transmission lines, first immediately turn-off ac power electronic switch 2, confirm after power-off, through N(N > 0) zero crossing after individual sine wave, again open ac power electronic switch 2, again detect load condition, if confirm not overload, normal power-up, continues normally operation, if confirm overload, control ac power electronic switch 2 and release 1 disconnection transmission line.When there is overload, first disconnect ac power electronic switch 2 and guarantee safety, while confirming really to transship, just disconnect ac power electronic switch 2 and release 1 simultaneously, disconnect transmission line completely, fail safe is good.
Further, before whether detection transmission line leaks electricity, first intelligent control system 4 carries out self check to circuit, when self check is normal, start ac power electronic switch 2 and connect transmission lines, and continue timing cycle self check, when self check occurs when abnormal, turn-off electronic power switch 2, report to the police and show abnormal situation.Before leakage switch work, first carry out self check, can confirm that current leakage switch is safe, prevent from, because having used the leakage switch of fault, security incident occurs.
When some electrical appliance starts, can produce larger starting current, when electric current surpasses, system can be judged as overload, disconnect ac power electronic switch 2 and release 1, but for some electricity consumption device, during startup, need necessarily buffering course electric current 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, and reopen transmission line, continuous break-make by transmission line allows the electric current of electricity consumption device reach to stablize normal state.
Therefore, single or single kind under loading condition, when confirming overload, whether inquiry system needs to carry out soft start, if do not need, control ac power electronic switch 2 and release 1 disconnection transmission line, if desired, start soft start step, while supervisory circuit state, time delay backed off after random soft start, and detect and judge that whether transmission line is still in overload, if still transship, control ac power electronic switch and release and disconnect transmission line, if after time delay, circuit exits overload, and system is recovered normal power supply.
Shown in Figure 20, the control method of the supper-fast leakage switch of the present invention is specific as follows:
B1: give intelligent control system 4 and leakage switch electrification reset.
B2: intelligent control system 4 is carried out self check.
B3: judge that whether system is normal, if normal, execution step B4, if undesired, turn-off electronic power switch 2 and report to the police, and then performs step B2.
B4: open ac power electronic switch 2, and continue timing cycle self check.
B5: detect transmission line and whether leak electricity, if normal, perform step B9, if electric leakage performs step B6.
B6: turn-off ac power electronic switch 2.
B7: reopen electronic power switch after time delay.
B8: start and confirm electric leakage step, again detect transmission line and whether leak electricity, if normal, perform step B5, if electric leakage performs step B9.
B9: turn-off electronic power switch 2 and and turn-off release 1 and the electric leakage of reporting to the police.
B10: confirm the basic leakage current value of acquiescence.
B11: detect transmission line and whether transship, if normal, execution step B5, if overload, execution step B12.
B12: turn-off electronic power switch 2.
B13: reopen electronic power switch after time delay.
B14: start and confirm overload step, again detect transmission line and whether transship, if normal, perform step B5, if overload performs step B15.
B15: whether inquiry system needs soft start, if desired, performs step B16, if do not need, performs step B18.
B16: start soft start.
Whether B17: time delay is also exited soft start, again detect transmission line and transship, if normal, performs step B5, if overload performs step B18.
B18: turn-off ac power electronic switch 2 and turn-off release 1 and the overload of reporting to the police.
The above, be preferred embodiment of the present invention, and the present invention is not limited to above-mentioned execution mode, as long as it reaches technique effect of the present invention with identical means, all should belong to protection scope of the present invention.
Claims (10)
1. a supper-fast leakage switch, it is characterized in that: comprise transmission line, on described transmission line, be provided with release, also comprise ac power electronic switch, described ac power electronic switch seals in to the transmission line at release place, described ac power electronic switch also comprises for controlling the control port of its break-make, on described transmission line, be also provided with the checkout gear for detection of transmission line status, also comprise an intelligent control system, described intelligent control system respectively with release, the control port of ac power electronic switch is connected with checkout gear.
2. a kind of supper-fast leakage switch according to claim 1, it is characterized in that: described ac power electronic switch comprises diode D7, D8 and two control switchs, two described control switchs are connected serially on transmission line respectively with after diode D7, D8 inverse parallel.
3. a kind of supper-fast leakage switch according to claim 2, is characterized in that: two described control switchs are parallel with respectively capacitor C 1, C2.
4. a kind of supper-fast leakage switch according to claim 1, it is characterized in that: described ac power electronic switch comprises diode D1, D2, D3, D4 and control switch, described diode D1, D2, D3, D4 are connected serially on transmission line after being connected with control switch bridge-type.
5. a kind of supper-fast leakage switch according to claim 1, it is characterized in that: described ac power electronic switch comprises diode D5, D6 and two control switchs, two described control switchs after connecting with diode D5, D6 respectively again parallel connection seal in to transmission line.
6. according to the arbitrary described a kind of supper-fast leakage switch of claim 2 to 5, it is characterized in that: described control switch is full-control type power electronic semiconductor device.
7. the control method of the arbitrary described supper-fast leakage switch of a claim 1 to 5, it is characterized in that: whether described intelligent control system is detected on transmission line and leaked electricity by checkout gear, when generation electric leakage being detected, turn-off immediately ac power electronic switch, start and confirm electric leakage step, reopen ac power electronic switch, by checkout gear, reaffirm whether electric leakage occurs, when confirming electric leakage, intelligent control system controls ac power electronic switch and release disconnects transmission line.
8. the control method of a kind of supper-fast leakage switch according to claim 7, it is characterized in that: when detecting while not leaking electricity, whether intelligent control system also detects transmission line by checkout gear and transships, when generation overload being detected, turn-off immediately ac power electronic switch, start and confirm overload step, reopen ac power electronic switch, by checkout gear, reaffirm whether overload occurs, when confirming overload, intelligent control system controls ac power electronic switch and release disconnects transmission line, if it is normal that circuit has recovered, enter operating state.
9. the control method of a kind of supper-fast leakage switch under according to Claim 8, it is characterized in that: when confirming overload, whether inquiry system needs to carry out soft start, if do not need, controls ac power electronic switch and release and disconnects transmission line, if desired, start soft start step, time delay backed off after random soft start, and judge that whether transmission line is still in overload, if still overload, controls ac power electronic switch and release and disconnects transmission line.
10. the control method of a kind of supper-fast leakage switch under according to Claim 8, it is characterized in that: before whether detection transmission line leaks electricity, first intelligent control system carries out self check to circuit, when self check is normal, start ac power electronic switch and connect transmission line, when self check occurs when abnormal, keep off state, report to the police and show abnormal situation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310686068.5A CN103746336B (en) | 2013-12-16 | 2013-12-16 | A kind of Superfast leakage switch and control method thereof |
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| CN201310686068.5A CN103746336B (en) | 2013-12-16 | 2013-12-16 | A kind of Superfast leakage switch and control method thereof |
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| CN103746336A true CN103746336A (en) | 2014-04-23 |
| CN103746336B CN103746336B (en) | 2016-08-17 |
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| CN201310686068.5A Active CN103746336B (en) | 2013-12-16 | 2013-12-16 | A kind of Superfast leakage switch and control method thereof |
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| Country | Link |
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| CN (1) | CN103746336B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103986138A (en) * | 2014-05-14 | 2014-08-13 | 国家电网公司 | Modularized current-limiting breaker power module |
| CN111380229A (en) * | 2020-03-19 | 2020-07-07 | 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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| CN111380229A (en) * | 2020-03-19 | 2020-07-07 | 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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| Publication number | Publication date |
|---|---|
| CN103746336B (en) | 2016-08-17 |
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