CN103904773A - Bypass device of power distribution equipment and control method of power distribution network - Google Patents
Bypass device of power distribution equipment and control method of power distribution network Download PDFInfo
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Abstract
The invention discloses a bypass device of power distribution equipment and a control method of a power distribution network. The bypass device comprises a detection element and a first switch element. The detecting element is used for being connected with the output end of the power distribution equipment, and detecting whether voltage of the output end is smaller than or equal to a preset threshold value or not, wherein the voltage of the output end represents a voltage value output by the output end. The first switch element is used for being connected between the input end and the output end of the power distribution equipment. The first switch element is associated with the detecting element, and is used for enabling the input end and the output end to be electrically connected when the detecting element detects that the voltage of the output end is smaller than or equal to the preset threshold value. The bypass device of the power distribution equipment and the control method of the power distribution network solve the technical problem that the power distribution network stops supplying power to loads for a long time when a UPS breaks down.
Description
Technical field
The present invention relates to power domain, in particular to a kind of control method of shunting device and distribution network of controller switching equipment.Background technology
At present; manufacture field in solar energy production; the ingot furnace electrical control cabinet of casting solar cell silicon ingot can adopt uninterrupted power supply UPS(Uninterruptible Power Supply conventionally) cooperated power supply; so that in the time of AC network power-off; can continue as ingot furnace power supply by UPS, avoid the anxious loss that stops causing of equipment.But because UPS can not consider the situation of the control cubicle power failure that the fault of UPS own causes conventionally in when design, therefore, in existing scheme, if UPS breaks down, the mode that generally can adopt UPS for subsequent use to replace fault UPS is processed.But in some cases, such as when the outer net flash, may there is the phenomenon of many UPS simultaneous faultss, under this situation, if there is no extra UPS for subsequent use or because other reasons is changed UPS not in time, can cause the power failure of long period, and then cause ingot furnace blowing out even to be broken down, if, also can there is the risk of silicon leakage accident in the critical section of ingot furnace in working procedure.As can be seen here, when prior art exists UPS itself to break down, easily cause the problem of distribution network power failure.
For above-mentioned problem, effective solution is not yet proposed at present.
Summary of the invention
The embodiment of the present invention provides a kind of control method of shunting device and distribution network of controller switching equipment, while breaking down, easily causes distribution network to interrupt for a long time the technical problem powering to the load at least to solve UPS.
According to the embodiment of the present invention aspect, a kind of shunting device of controller switching equipment is provided, comprise: detection means, for being connected to the output end of controller switching equipment, and detect output end voltage and whether be less than or equal to predetermined threshold value, wherein, above-mentioned output end voltage represents the magnitude of voltage by the output of above-mentioned output end; The first switching device, for being connected between the input end and output end of above-mentioned controller switching equipment; Wherein, above-mentioned the first switching device is associated with above-mentioned detection means, in the time that above-mentioned detection means detects that above-mentioned output end voltage is less than or equal to above-mentioned predetermined threshold value, above-mentioned input end is electrically connected with above-mentioned output end.
Preferably, said apparatus also comprises: second switch device, and for being connected between above-mentioned input end and electrical network link, and/or, for being connected between above-mentioned output end and load link; Wherein, above-mentioned second switch device is associated with above-mentioned detection means, for in the time that above-mentioned detection means detects that above-mentioned output end voltage is less than or equal to above-mentioned predetermined threshold value, disconnect being electrically connected between above-mentioned input end and above-mentioned electrical network link and/or between above-mentioned output end and above-mentioned load link, and in the time that above-mentioned detection means detects that above-mentioned output end voltage is greater than above-mentioned predetermined threshold value, make to be electrically connected between above-mentioned input end and above-mentioned electrical network link and/or between above-mentioned output end and above-mentioned load link.
Preferably, above-mentioned the first switching device comprises: the first switch, be connected between first input end and the first output, and in the time detecting that above-mentioned output end voltage is less than or equal to above-mentioned predetermined threshold value, above-mentioned the first switch closure; Second switch, is connected between the second input and the second output, in the time detecting that above-mentioned output end voltage is less than or equal to above-mentioned predetermined threshold value, and above-mentioned second switch closure; Wherein, above-mentioned input end comprises above-mentioned first input end and above-mentioned the second input, and for input dc power or alternating current, above-mentioned output end comprises above-mentioned the first output and above-mentioned the second input, for exporting direct current or alternating current.
Preferably, said apparatus comprises: the first relay, is connected between above-mentioned the first output and above-mentioned the second output; Wherein, the first normally-closed contact in above-mentioned the first relay is connected between above-mentioned first input end and above-mentioned the first output, the second normally-closed contact in above-mentioned the first relay is connected between above-mentioned the second input and above-mentioned the second output, the first normally opened contact in above-mentioned the first relay is connected between above-mentioned the first normally-closed contact and above-mentioned the first output, and the second normally opened contact in above-mentioned the first relay is connected between above-mentioned the second normally-closed contact and above-mentioned the second output; Wherein, above-mentioned detection means comprises above-mentioned the first relay, and above-mentioned the first switch comprises above-mentioned the first normally-closed contact, and above-mentioned second switch comprises above-mentioned the second normally-closed contact.
Preferably, the 3rd normally opened contact in above-mentioned the first relay is connected between above-mentioned first input end and above-mentioned the first normally-closed contact, and the 4th normally opened contact in above-mentioned the first relay is connected between above-mentioned the second input and above-mentioned the second normally-closed contact.
Preferably, said apparatus comprises: the second relay, is connected between above-mentioned the first output and above-mentioned the second output; The 3rd relay, and the 3rd normally-closed contact in above-mentioned the second relay is connected between above-mentioned first input end and above-mentioned the second input; Wherein, the 5th normally opened contact in above-mentioned the 3rd relay is connected between above-mentioned first input end and above-mentioned the first output, the 6th normally opened contact in above-mentioned the 3rd relay is connected between above-mentioned the second input and above-mentioned the second output, the 4th normally-closed contact in above-mentioned the 3rd relay is connected between above-mentioned the 5th normally opened contact and above-mentioned the first output, and 5 constant virtues closed contact in above-mentioned the 3rd relay is connected between above-mentioned the 6th normally opened contact and above-mentioned the second output; Wherein, above-mentioned detection means comprises above-mentioned the second relay, and above-mentioned the first switch comprises above-mentioned the 5th normally opened contact, and above-mentioned second switch comprises above-mentioned the 6th normally opened contact.
Preferably, the 6th normally-closed contact in above-mentioned the 3rd relay is connected between above-mentioned first input end and above-mentioned the 5th normally opened contact, and the 7th normally-closed contact in above-mentioned the 3rd relay is connected between above-mentioned the second input and above-mentioned the 6th normally opened contact; And/or said apparatus also comprises: normally closed switch, is connected in the series arm at above-mentioned the 3rd relay and above-mentioned the 3rd normally-closed contact place.
Preferably, said apparatus also comprises: above-mentioned controller switching equipment, and wherein, in normal operation, above-mentioned output end voltage is equal to input terminal voltage, and above-mentioned input terminal voltage represents the magnitude of voltage by the input of above-mentioned input end.
Preferably, above-mentioned controller switching equipment comprises uninterrupted power supply UPS; And/or the load that above-mentioned controller switching equipment connects comprises ingot furnace.
According to the embodiment of the present invention on the other hand, also provide a kind of control method of distribution network, having comprised: whether the output end voltage that judges the controller switching equipment in distribution network has been less than or equal to predetermined threshold value; If be judged as YES, above-mentioned controller switching equipment broken from above-mentioned distribution network, and use the shunting device as above-mentioned in any one in claim 1 to 9 that above-mentioned controller switching equipment is corresponding to power to the load.
Preferably, above-mentioned controller switching equipment comprises uninterrupted power supply UPS; And/or the load that above-mentioned controller switching equipment connects comprises ingot furnace.
In embodiments of the present invention, adopt the mode that shunting device is set for the controller switching equipment in distribution network, particularly, this shunting device can comprise detection means and switching device, when detecting the output end voltage of controller switching equipment, detection means is slipped under certain predetermined threshold value, or even it is 1 o'clock, can judge this controller switching equipment breaks down, and then detection that can be based on to fault, utilize the interlock control between detection means and switching device, automatically supply access is switched to the supply access in shunting device by controller switching equipment, this has just been avoided the interruption of distribution network power supply substantially, and then avoid distribution network institute bringing onto load because of the long-time relevant issues such as the equipment fault that brings of interrupting of powering, thereby having solved when UPS breaks down easily causes distribution network to interrupt for a long time the technical problem powering to the load.
Brief description of the drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is according to the schematic diagram of the shunting device of a kind of optional controller switching equipment of the embodiment of the present invention;
Fig. 2 is according to the schematic diagram of the shunting device of the optional controller switching equipment of another kind of the embodiment of the present invention;
Fig. 3 is according to the schematic diagram of the shunting device of another optional controller switching equipment of the embodiment of the present invention;
Fig. 4 is according to the schematic diagram of the control method of a kind of optional distribution network of the embodiment of the present invention.
Embodiment
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the application can combine mutually.
Embodiment 1
According to the embodiment of the present invention, a kind of shunting device of controller switching equipment is provided, as shown in Figure 1, this device comprises:
1) detection means 102, for being connected to the output end of controller switching equipment 106, and detects output end voltage and whether is less than or equal to predetermined threshold value, and wherein, output end voltage represents the magnitude of voltage by the output of output end;
2) the first switching device 104, for being connected between the input end and output of controller switching equipment 106; Wherein,
The first switching device 104 is associated with detection means 102, in the time that detection means 102 detects that output end voltage is less than or equal to predetermined threshold value, makes to input end and is electrically connected with output end.
Will be clear that, one of embodiment of the present invention technical problem to be solved is to provide a kind of device, power to the load with the controller switching equipment 106 in secondary distribution network, and in the time that controller switching equipment 106 breaks down, can avoid the interruption powering to the load, and then avoid the relevant issues of bringing due to interruption of power supply, the damage that for example may cause load equipment etc.
Applied environment taking the UPS as one of controller switching equipment 106 in solar energy industry is example.At present, manufacture field in solar energy production, the ingot furnace electrical control cabinet of casting solar cell silicon ingot can adopt UPS cooperated power supply conventionally, so that in the time of AC network power-off, can continue as ingot furnace power supply by UPS, avoids the anxious loss that stops causing of equipment.But because UPS can not consider the situation of the control cubicle power failure that the fault of UPS own causes conventionally in when design, therefore, in existing scheme, if UPS breaks down, the mode that generally can adopt UPS for subsequent use to replace fault UPS is processed.But in some cases, such as when the outer net flash, may there is the phenomenon of many UPS simultaneous faultss, under this situation, if there is no extra UPS for subsequent use or because other reasons is changed UPS not in time, can cause the power failure of long period, and then cause ingot furnace blowing out even to be broken down, if, also can there is the risk of silicon leakage accident in the critical section of ingot furnace in working procedure.As can be seen here, when prior art exists UPS itself to break down, easily cause the problem of distribution network power failure.
For addressing this problem, in embodiments of the present invention, adopt the mode that shunting device is set for the controller switching equipment 106 in distribution network, particularly, this shunting device can comprise detection means 102 and switching device 104, when detecting the output end voltage of controller switching equipment 106, detection means 102 is slipped under certain predetermined threshold value, or even it is 1 o'clock, can judge this controller switching equipment 106 breaks down, and then detection that can be based on to fault, utilize the interlock control between detection means 102 and switching device, automatically supply access is switched to the supply access in shunting device by controller switching equipment 106, this has just been avoided the interruption of distribution network power supply substantially, and then avoid distribution network institute bringing onto load because of the long-time relevant issues such as the equipment fault that brings of interrupting of powering, thereby having solved when UPS breaks down easily causes distribution network to interrupt for a long time the technical problem powering to the load.
Below with reference to accompanying drawing and specific embodiment, technical solution of the present invention and operation principle thereof are described in detail.
The shunting device providing according to the embodiment of the present invention, can comprise detection means 102, wherein, this detection means 102 is for being connected to the output end of corresponding controller switching equipment 106, whether be less than or equal to predetermined threshold value so that detect the output end voltage of this controller switching equipment 106, be less than or equal to predetermined threshold value if detect output end voltage, can be judged as controller switching equipment 106 breaks down, and then can export control signal to the first switching device 104, connect power supply bypass so that make the first switching device 104, " walk around " controller switching equipment 106 that breaks down load supplying downstream directly.
Usually, in embodiments of the present invention, above-mentioned controller switching equipment 106 can be UPS, thereby can adopt relatively simple bypass design.But this unique execution mode that is not the present invention, for example, in some embodiments of the invention, this controller switching equipment 106 can be also all kinds of electrical connections such as deconcentrator etc., also can be the access device of distributed power grid, etc., this does not affect the enforcement of technical solution of the present invention and the realization of technique effect thereof, and the present invention is not also limited in any way this.Especially, for comparatively desirable a kind of implementation environment of the present invention, under its normal operating conditions, the output end voltage of this controller switching equipment 106 can be equal to its input terminal voltage, thereby can adopt more the bypass design of simplifying, and the disturbance of avoiding supply access to switch bringing or even the appearance of failure problems.
Particularly, in embodiments of the present invention, above-mentioned output end voltage can represent the magnitude of voltage by the output end output of controller switching equipment 106, input terminal voltage can represent the magnitude of voltage by the input end input of controller switching equipment 106, wherein, because this controller switching equipment 106 both can be for direct current network distribution, also can be for AC network distribution, therefore the input end of this controller switching equipment 106 and output end both can be used for respectively input and output direct current, also can be used for respectively input and output alternating current, the present invention is not construed as limiting this, but as comparatively preferred embodiment, the shunting device providing according to the embodiment of the present invention can be all for input and output the controller switching equipment 106 of direct current or interchange, this just can be avoided the use of converter in bypass, thereby reduce volume and the cost of whole shunting device.
More specifically, in embodiments of the present invention, for the controller switching equipment 106 of direct current input and output, detection means 102 can its output end voltage of direct-detection voltage magnitude, and for the controller switching equipment 106 that exchanges input and output, detection means 102 can detect the peak value of its output end voltage, also can detect the average of voltage, and this still can be considered as is the detection to magnitude of voltage.Under above-mentioned scene; in the time that controller switching equipment 106 breaks down; especially while there is the most common line fault; its output end voltage there will be comparatively significantly decline conventionally; or even directly drop to zero; therefore, no matter be to direct current or interchange, all can will detect that output end voltage drops to the criterion that a certain predetermined threshold value or following this condition break down as controller switching equipment 106.Particularly, in embodiments of the present invention, above-mentioned line fault both can come from the component wear that the external factor such as outer net flash cause, also can come from the component wear that the internal factors such as component ageing cause, can also come from open circuit fault that other factors such as poor contact of contacts or line short cause etc., the present invention is not construed as limiting this.
On basis described above, the shunting device providing according to the embodiment of the present invention, also comprises the first switching device 104, wherein, this first switching device 104 can be connected between the input end and output end of controller switching equipment 106, and is associated with detection means 102.By this first switching device 104, can be in the time that detection means 102 detects that output end voltage is less than or equal to predetermined threshold value, making to input end is electrically connected with output end, this is equivalent to overall controller switching equipment 106 short circuit, also be " to have walked around " this controller switching equipment 106, and directly power to the load.By this mode, just can avoid the long-time interruption of distribution network power supply, and then avoid the relevant issues such as the distribution network institute bringing onto load equipment fault that interruption brings for a long time because powering, easily cause distribution network to interrupt for a long time the problem powering to the load thereby solve when UPS breaks down.
In embodiments of the present invention, interrelational form between above-mentioned detection means 102 and the first switching device 104 can have multiple, it both can be realized in conjunction with software logic by controller chip, also can directly build based on hardware logic, and the present invention is not construed as limiting this.For example, as a kind of feasible mode, in some embodiments of the invention, can adopt analogue collection module to gather the output end voltage of controller switching equipment 106, and by the transfer of data collecting to microprocessor, and then microprocessor can judge whether output end voltage is less than or equal to predetermined threshold value according to the program writing in advance, and export for making it connect the control signal of bypass to the first switching device 104 in the time being less than or equal to predetermined threshold value.Wherein, this data acquisition module both can be connected an output in output end with microprocessor, and by the terminal voltage of this output with carry out recently obtaining magnitude of voltage in analog, also can connect the plural output in output end, to obtain magnitude of voltage more accurately, this all can be considered as is the concrete form that detection means 102 is connected to the output end of controller switching equipment 106, and the present invention does not do too much restriction.
Usually, for middle and low voltage network, its supply line is normally formed by two corresponding circuits, such as for AC power transmission, its supply line can comprise live wire and zero line, transmits for direct current power, its supply line can comprise feeder line and reflux line, wherein, the common ground connection of this zero line and reflux line, therefore detection means 102 also can only detect the magnitude of voltage of live wire or feeder line conventionally as the output end voltage of controller switching equipment 106.Under above-mentioned scene, as the optional mode of one, this first switching device 104 can comprise:
1) the first switch, is connected between first input end and the first output, in the time detecting that terminal voltage is less than or equal to predetermined threshold value, and the first switch closure;
2) second switch, is connected between the second input and the second output, in the time detecting that terminal voltage is less than or equal to predetermined threshold value, and second switch closure; Wherein,
Input end comprises first input end and the second input, and for input dc power or alternating current, output end comprises the first output and the second input, for exporting direct current or alternating current.
Further alternatively, in embodiments of the present invention, above-mentioned shunting device can also comprise:
1) second switch device, for being connected between input end and electrical network link, and/or, for being connected between output end and load link; Wherein,
Second switch device is associated with detection means 102, for in the time that detection means 102 detects that output end voltage is less than or equal to predetermined threshold value, disconnect being electrically connected between input end and electrical network link and/or between output end and load link, and in the time that detection means 102 detects that terminal voltage is greater than predetermined threshold value, make to input between end and electrical network link and/or output end and load link between be electrically connected.
By the way, detect that in detection means 102 output end voltage is less than or equal to predetermined threshold value, also when judging controller switching equipment 106 and breaking down, connecting outside bypass, can also automatically controller switching equipment 106 be broken from distribution network, so that guarantee the fail safe of attendant in the time that controller switching equipment 106 is overhauled, and shorten fault restoration speed.Such as under above-mentioned scene, in the time that controller switching equipment 106 breaks down, attendant can be replaced by stand-by equipment by the controller switching equipment of fault 106, and again this stand-by equipment is linked in distribution network after replacing, then the bypass of being responsible for interim power supply is cut off.
Be described below in conjunction with 2 and 3 pairs of more specifically execution modes of the present invention of accompanying drawing, should be understood that, this is schematically described only for the understanding of the present invention, can't form any unnecessary restriction to the present invention.
Fig. 2 shows according to the schematic diagram of a kind of optional shunting device of the embodiment of the present invention.
In Fig. 2, the corresponding controller switching equipment of shunting device can be UPS106, particularly, the first input end of this UPS106 can be connected to electrical network input 108, the second input can be connected to electrical network input 110, the first output can be connected to load output 112, the second outputs can be connected to load output 114.Wherein, taking Alternating Current Power Supply as example, this electrical network input 108 and 110 can be used for being connected AC network, and load output 112 and 114 can be used for being connected AC load.
As shown in Figure 2, in embodiments of the present invention, above-mentioned shunting device can comprise:
1) the first relay 202, is connected between the first output and the second output; Wherein,
The first normally-closed contact 204 in the first relay 202 is connected between first input end and the first output, the second normally-closed contact 206 in the first relay 202 is connected between the second input and the second output, the first normally opened contact 208 in the first relay 202 is connected between the first normally-closed contact 204 and the first output, and the second normally opened contact 210 in the first relay 202 is connected between the second normally-closed contact 206 and the second output; Wherein,
Under above-mentioned scene, in the time that UPS106 normally works, output end voltage maintains normal value, cause the first relay 202 adhesives between the first output and the second output that is connected to UPS106, the first normally-closed contact 204 and the second normally-closed contact 206 that are provided by it disconnect, bypass is not worked, the first normally opened contact 208 and the second normally opened contact 210 closures, and UPS106 is to load normal power supply.And in the time that UPS106 breaks down, declining appears in its output end voltage, cause the first relay 202 to discharge, and then the first normally-closed contact 204 being provided by it and the second normally-closed contact 206 closures, bypass work, the first normally opened contact 208 and the second normally opened contact 210 disconnect, and UPS106 no longer powers to the load, then are directly powered to the load by bypass by AC network.After attendant changes or repaired UPS, UPS output end voltage recovers normal value, the adhesive that powers on of the first relay 202, thus by the circuit connection state state of UPS while normally working of resetting back, distribution network recovery is normally.
Further alternatively, as shown in Figure 2, in embodiments of the present invention, the 3rd normally opened contact 212 in the first relay 202 can also be connected between first input end and the first normally-closed contact 204, and the 4th normally opened contact 214 in the first relay 202 can also be connected between the second input and the second normally-closed contact 206.Under this situation, in the time that UPS106 normally works, output end voltage maintains normal value, the first relay 202 adhesives, the 3rd normally opened contact 212 being provided by it and the 4th normally opened contact 214 closures, AC network is normally to UPS106 power supply, and in the time that UPS106 breaks down, output end voltage declines, the first relay 202 discharges, the 3rd normally opened contact 212 and the 4th normally opened contact 214 disconnect, and UPS106 is no longer charged, and this has just facilitated the follow-up inspection operation carrying out of attendant.Wherein, aforementioned second switch device can comprise the 3rd normally opened contact 212 and the 4th normally opened contact 214.
Fig. 3 shows according to the schematic diagram of the optional shunting device of another kind of the embodiment of the present invention.
In Fig. 3, the corresponding controller switching equipment of shunting device can be UPS106, particularly, the first input end of this UPS106 can be connected to electrical network input 108, the second input can be connected to electrical network input 110, the first output can be connected to load output 112, the second outputs can be connected to load output 114.Wherein, taking Alternating Current Power Supply as example, this electrical network input 108 and 110 can be used for being connected AC network, and load output 112 and 114 can be used for being connected AC load.
As shown in Figure 3, in embodiments of the present invention, above-mentioned shunting device can comprise:
1) the second relay 302, is connected between the first output and the second output;
2) the 3rd relay 304, and the 3rd normally-closed contact 306 in the second relay 302 is connected between first input end and the second input; Wherein,
The 5th normally opened contact 308 in the 3rd relay 304 is connected between first input end and the first output, the 6th normally opened contact 310 in the 3rd relay 304 is connected between the second input and the second output, the 4th normally-closed contact 312 in the 3rd relay 304 is connected between the 5th normally opened contact 308 and the first output, and 5 constant virtues closed contact 314 in the 3rd relay 304 is connected between the 6th normally opened contact 310 and the second output; Wherein,
Under above-mentioned scene, in the time that UPS106 normally works, output end voltage maintains normal value, cause the second relay 302 adhesives between the first output and the second output that is connected to UPS106, the 3rd normally-closed contact 306 being provided by the second relay 302 disconnects, connect with the 3rd normally-closed contact 306 and on same branch road the 3rd relay 304 power-off discharge, the 5th normally opened contact 308 and the 6th normally opened contact 310 that are provided by the 3rd relay 304 disconnect, bypass is not worked, same the 4th normally-closed contact 312 and 5 constant virtues closed contact 314 closures that provided by the 3rd relay 304, UPS106 is to load normal power supply.And in the time that UPS breaks down, declining appears in its output end voltage, cause the second relay 302 to discharge, the 3rd normally-closed contact 306 closures, cause the 3rd relay 304 adhesive that powers on of series connection, and then make the 5th normally opened contact 308 and the 6th normally opened contact 310 closures, bypass work, the 4th normally-closed contact 312 and 5 constant virtues closed contact 314 disconnect, and UPS106 stops powering to the load, then are directly powered to the load by bypass by AC network.After attendant changes or has repaired UPS, UPS output end voltage recovers normal value, the adhesive that powers on of the second relay 302, cause the 3rd normally-closed contact 306 to disconnect, the 3rd relay 304 discharges, thereby by the circuit connection state state of UPS while normally working of resetting back, it is normal that distribution network recovers.
Further alternatively, in embodiments of the present invention, shunting device as shown in Figure 3 can also comprise:
1) normally closed switch 320, is connected in the series arm at the 3rd relay 304 and the 3rd normally-closed contact 306 places.
By this improvement, after attendant changes or has repaired UPS, also can be by the operation of normally closed switch 320 being cut off to the energising of the 3rd relay 304 place branch roads, cause the 3rd relay 304 to discharge, thereby by the circuit connection state state of UPS while normally working of resetting back, it is normal that distribution network recovers.
Further alternatively, as shown in Figure 3, in embodiments of the present invention, the 6th normally-closed contact 316 in the 3rd relay 304 is connected between first input end and the 5th normally opened contact 308, and the 7th normally-closed contact 318 in the 3rd relay 304 is connected between the second input and the 6th normally opened contact 310.Under this situation, in the time that UPS106 normally works, output end voltage maintains normal value, the second relay 302 adhesives, the 3rd normally-closed contact 306 disconnects, the 3rd relay 304 discharges, AC network is normally to UPS power supply, and in the time that UPS106 breaks down, output end voltage declines, the second relay 302 discharges, the 3rd normally-closed contact 306 closures, the 3rd relay 304 adhesives, cause the 6th normally-closed contact 316 and the 7th normally-closed contact 318 to disconnect, UPS106 is no longer charged, and this has just facilitated the follow-up inspection operation carrying out of attendant.Wherein, aforementioned second switch device can comprise the 6th normally-closed contact 316 and the 7th normally-closed contact 318.
It should be noted that, in embodiments of the present invention, above-mentioned " first ", " second ", " the 3rd " ... only, for explaining conveniently, to distinguish different description objects, and should not be understood as the restriction in context, position relationship or significance level to all parts.
The invention provides a kind of preferred embodiment and come further the present invention to be made an explanation, but it should be noted that the preferred embodiment, just in order better to describe the present invention, does not form the present invention is limited improperly.
Embodiment 2
According to the embodiment of the present invention, a kind of control method of the distribution network based on above-mentioned shunting device is also provided, as shown in Figure 4, the method comprises:
S402: whether the output end voltage that judges the controller switching equipment in distribution network is less than or equal to predetermined threshold value;
S404: if be judged as YES, controller switching equipment is broken from distribution network, and use the shunting device as described in Example 1 that controller switching equipment is corresponding to power to the load.
Will be clear that, one of embodiment of the present invention technical problem to be solved is to provide a kind of method, power to the load with the controller switching equipment in secondary distribution network, and in the time that controller switching equipment breaks down, can avoid the interruption powering to the load, and then avoid the relevant issues of bringing due to interruption of power supply, the damage that for example may cause load equipment etc.
Applied environment taking the UPS as one of controller switching equipment in solar energy industry is example.At present, manufacture field in solar energy production, the ingot furnace electrical control cabinet of casting solar cell silicon ingot can adopt UPS cooperated power supply conventionally, so that in the time of AC network power-off, can continue as ingot furnace power supply by UPS, avoids the anxious loss that stops causing of equipment.But because UPS can not consider the situation of the control cubicle power failure that the fault of UPS own causes conventionally in when design, therefore, in existing scheme, if UPS breaks down, the mode that generally can adopt UPS for subsequent use to replace fault UPS is processed.But in some cases, such as when the outer net flash, may there is the phenomenon of many UPS simultaneous faultss, under this situation, if there is no extra UPS for subsequent use or because other reasons is changed UPS not in time, can cause the power failure of long period, and then cause ingot furnace blowing out even to be broken down, if, also can there is the risk of silicon leakage accident in the critical section of ingot furnace in working procedure.As can be seen here, when prior art exists UPS itself to break down, easily cause the problem of distribution network power failure.
For addressing this problem, in embodiments of the present invention, adopt the mode that shunting device is set for the controller switching equipment in distribution network, particularly, this shunting device can comprise detection means and switching device, when detecting the output end voltage of controller switching equipment, detection means is slipped under certain predetermined threshold value, or even it is 1 o'clock, can judge this controller switching equipment breaks down, and then detection that can be based on to fault, utilize the interlock control between detection means and switching device, automatically supply access is switched to the supply access in shunting device by controller switching equipment 106, this has just been avoided the interruption of distribution network power supply substantially, and then avoid distribution network institute bringing onto load because of the long-time relevant issues such as the equipment fault that brings of interrupting of powering, thereby having solved when UPS breaks down easily causes distribution network to interrupt for a long time the technical problem powering to the load.
Particularly, the control method providing according to the embodiment of the present invention, in step S402, can judge whether the output end voltage of the controller switching equipment in distribution network is less than or equal to predetermined threshold value by detection means as described in Example 1, and then at step S404, controller switching equipment can be broken from distribution network, and use the shunting device as described in Example 1 that controller switching equipment is corresponding to power to the load.By this mode, just can avoid the long-time interruption of distribution network power supply, and then avoid the relevant issues such as the distribution network institute bringing onto load equipment fault that interruption brings for a long time because powering, easily cause distribution network to interrupt for a long time the problem powering to the load thereby solve when UPS breaks down.Wherein, there is multiple embodiment in the control method providing according to the embodiment of the present invention, specifically can be with reference to the associated description in embodiment 1.
The invention provides a kind of preferred embodiment and come further the present invention to be made an explanation, but it should be noted that the preferred embodiment, just in order better to describe the present invention, does not form the present invention is limited improperly.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (11)
1. a shunting device for controller switching equipment, is characterized in that, comprising:
Detection means, for being connected to the output end of controller switching equipment, and detects output end voltage and whether is less than or equal to predetermined threshold value, and wherein, described output end voltage represents the magnitude of voltage by the output of described output end;
The first switching device, for being connected between the input end and output end of described controller switching equipment; Wherein,
Described the first switching device is associated with described detection means, in the time that described detection means detects that described output end voltage is less than or equal to described predetermined threshold value, described input end is electrically connected with described output end.
2. device according to claim 1, is characterized in that, also comprises:
Second switch device, for being connected between described input end and electrical network link, and/or, for being connected between described output end and load link; Wherein,
Described second switch device is associated with described detection means, for in the time that described detection means detects that described output end voltage is less than or equal to described predetermined threshold value, disconnect being electrically connected between described input end and described electrical network link and/or between described output end and described load link, and in the time that described detection means detects that described output end voltage is greater than described predetermined threshold value, make to be electrically connected between described input end and described electrical network link and/or between described output end and described load link.
3. device according to claim 1, is characterized in that, described the first switching device comprises:
The first switch, is connected between first input end and the first output, in the time detecting that described output end voltage is less than or equal to described predetermined threshold value, and described the first switch closure;
Second switch, is connected between the second input and the second output, in the time detecting that described output end voltage is less than or equal to described predetermined threshold value, and described second switch closure; Wherein,
Described input end comprises described first input end and described the second input, and for input dc power or alternating current, described output end comprises described the first output and described the second input, for exporting direct current or alternating current.
4. device according to claim 3, is characterized in that, comprising:
The first relay, is connected between described the first output and described the second output; Wherein,
The first normally-closed contact in described the first relay is connected between described first input end and described the first output, the second normally-closed contact in described the first relay is connected between described the second input and described the second output, the first normally opened contact in described the first relay is connected between described the first normally-closed contact and described the first output, and the second normally opened contact in described the first relay is connected between described the second normally-closed contact and described the second output; Wherein,
Described detection means comprises described the first relay, and described the first switch comprises described the first normally-closed contact, and described second switch comprises described the second normally-closed contact.
5. device according to claim 4, it is characterized in that, the 3rd normally opened contact in described the first relay is connected between described first input end and described the first normally-closed contact, and the 4th normally opened contact in described the first relay is connected between described the second input and described the second normally-closed contact.
6. device according to claim 3, is characterized in that, comprising:
The second relay, is connected between described the first output and described the second output;
The 3rd relay, and the 3rd normally-closed contact in described the second relay is connected between described first input end and described the second input; Wherein,
The 5th normally opened contact in described the 3rd relay is connected between described first input end and described the first output, the 6th normally opened contact in described the 3rd relay is connected between described the second input and described the second output, the 4th normally-closed contact in described the 3rd relay is connected between described the 5th normally opened contact and described the first output, and 5 constant virtues closed contact in described the 3rd relay is connected between described the 6th normally opened contact and described the second output; Wherein,
Described detection means comprises described the second relay, and described the first switch comprises described the 5th normally opened contact, and described second switch comprises described the 6th normally opened contact.
7. device according to claim 6, is characterized in that,
The 6th normally-closed contact in described the 3rd relay is connected between described first input end and described the 5th normally opened contact, and the 7th normally-closed contact in described the 3rd relay is connected between described the second input and described the 6th normally opened contact; And/or,
Described device also comprises: normally closed switch, is connected in the series arm at described the 3rd relay and described the 3rd normally-closed contact place.
8. according to the device described in any one in claim 1 to 7, it is characterized in that, also comprise:
Described controller switching equipment, wherein, in normal operation, described output end voltage is equal to input terminal voltage, and described input terminal voltage represents the magnitude of voltage by the input of described input end.
9. according to the device described in any one in claim 1 to 7, it is characterized in that,
Described controller switching equipment comprises uninterrupted power supply UPS; And/or,
The load that described controller switching equipment connects comprises ingot furnace.
10. a control method for distribution network, is characterized in that, comprising:
Whether the output end voltage that judges the controller switching equipment in distribution network is less than or equal to predetermined threshold value;
If be judged as YES, described controller switching equipment broken from described distribution network, and use the shunting device as claimed in any one of claims 1-9 wherein that described controller switching equipment is corresponding to power to the load.
11. methods according to claim 10, is characterized in that,
Described controller switching equipment comprises uninterrupted power supply UPS; And/or,
The load that described controller switching equipment connects comprises ingot furnace.
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| CN103904773B (en) | 2016-02-03 |
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