CN212627161U - Super capacitor direct current device - Google Patents
Super capacitor direct current device Download PDFInfo
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- CN212627161U CN212627161U CN202021588729.2U CN202021588729U CN212627161U CN 212627161 U CN212627161 U CN 212627161U CN 202021588729 U CN202021588729 U CN 202021588729U CN 212627161 U CN212627161 U CN 212627161U
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- 239000003990 capacitor Substances 0.000 title claims abstract description 188
- 238000007599 discharging Methods 0.000 claims abstract description 57
- 239000013641 positive control Substances 0.000 claims abstract description 30
- 239000013642 negative control Substances 0.000 claims abstract description 28
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 230000009467 reduction Effects 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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Abstract
The utility model relates to a super capacitor DC device, include: the alternating current power supply comprises an alternating current A phase line, an alternating current B phase line, an alternating current C phase line, an alternating current power supply zero line, a positive bus, a positive control bus and a negative control bus, and further comprises a 220V rectification module, wherein the input end of the 220V rectification module is connected to the alternating current A phase line, the alternating current B phase line and the alternating current C phase line, and the output end of the 220V rectification module is connected to the positive control bus and the negative control bus; a voltage reduction silicon chain circuit is arranged between the positive bus and the positive control bus; the positive closing bus, the positive control bus and the negative control bus are connected to a station load through a reverse connection preventing circuit; the input end of each 45V rectification module is connected to an alternating current A phase line, an alternating current B phase line and an alternating current C phase line; the output end of each 45V rectifying module is connected with a super capacitor charging and discharging circuit, and super capacitors in the six super capacitor charging and discharging circuits are connected in series and then connected between a positive bus and a negative bus.
Description
Technical Field
The utility model belongs to the technical field of electric power system, a direct current equipment for electric power system is related to, especially a super capacitor dc device.
Background
In the prior art, a storage battery pack with the operation life of more than 10 years or the rated capacity value of 80 percent in a checking charge-discharge test within three charge-discharge cycles needs to be modified.
And the direct current system of the transformer substation is responsible for supplying power to the secondary system. The secondary system of the transformer substation is an important component which plays roles of control, protection and the like in the substation. Once the secondary system fails or has power failure, the healthy operation of the whole transformer substation is seriously influenced, and even the whole transformer substation loses power. Therefore, it is important to modify the dc system while ensuring that the secondary system is not powered off.
The 110kV and following transformer substations are mostly in a single set of direct current system power supply mode, so that two main methods for transforming the direct current system are available, namely: and simulating a power supply mode of the double sets of direct current systems, installing a new direct current system at the standby screen position, and handing over the new direct current system and the old direct current system after the installation and debugging are finished. And the second method comprises the following steps: and the temporary module is utilized to supply power to the transformer substation, and the original power supply mode is recovered after the direct current system is transformed. The second method is mostly adopted subject to objective conditions such as shortage of the standby screen positions of the transformer substation.
However, the load capacity of the current temporary module is only 40-60A, the maximum load current of the direct current system of the 110kV transformer substation can reach 150-200A, and the load capacity of the temporary module cannot adapt to the high-power discharging occasion, so that a switching-on power supply needs to be stopped, and two requirements cannot be met. Firstly, the capacitor cannot be automatically switched, so that reactive power compensation of a power grid is influenced; and secondly, the reclosing is stopped, when the line is tripped due to a fault, the reclosing cannot act, manual closing is needed, and the power failure time of a user is prolonged. This is a disadvantage of the prior art.
In view of this, the present invention provides a super capacitor dc device to solve the defects existing in the prior art, which is very necessary.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problem that the reactive power compensation of the power grid is influenced because the capacitor in the prior art can not be automatically switched; and the technical problem is solved by designing a super capacitor direct current device.
To practice the above purpose, the present invention provides the following technical solutions:
a supercapacitor dc device, comprising:
an AC phase line A, an AC phase line B, an AC phase line C, an AC power zero line, a positive bus, a positive control bus and a negative control bus,
the direct current device also comprises a 220V rectifying module, wherein the input end of the 220V rectifying module is connected to the alternating current A phase line, the alternating current B phase line and the alternating current C phase line, and the output end of the 220V rectifying module is connected to the positive control bus and the negative control bus;
a voltage reduction silicon chain circuit is arranged between the positive bus and the positive control bus;
the positive bus, the positive control bus and the negative control bus are connected to a station load through a reverse connection preventing circuit;
the direct current device also comprises six 45V rectifying modules, wherein the input end of each 45V rectifying module is connected to an alternating current A phase line, an alternating current B phase line and an alternating current C phase line; the output end of each 45V rectifying module is connected with a super capacitor charging and discharging circuit, and super capacitors in the six super capacitor charging and discharging circuits are connected in series and then connected between a positive bus and a negative bus.
Preferably, the super capacitor charging and discharging circuit comprises:
the positive end of the charging diode is connected to the positive output end of the 45V rectifying module, the negative end of the charging diode is connected to the first end of the super capacitor, the second end of the super capacitor is connected to the first end of the current-limiting resistor, the second end of the current-limiting resistor is connected with the first end of the normally open switch, the second end of the normally open switch is connected to the negative output end of the 45V rectifying module, a normally closed switch is connected between the first end of the super capacitor and the second end of the current-limiting resistor, the first end of the normally closed switch is connected to the first end of the super capacitor, and the second end of the normally closed switch is connected to; a locking structure is formed between the normally open switch and the normally closed switch;
the first end of the super capacitor of the first path of super capacitor charging and discharging circuit is connected to the positive bus, and the second end of the super capacitor of the first path of super capacitor charging and discharging circuit is connected to the first end of the super capacitor of the second path of super capacitor charging and discharging circuit;
the second end of the super capacitor of the second super capacitor charging and discharging circuit is connected to the first end of the super capacitor of the third super capacitor charging and discharging circuit;
the second end of the super capacitor of the third super capacitor charging and discharging circuit is connected to the first end of the super capacitor of the fourth super capacitor charging and discharging circuit;
the second end of the super capacitor of the fourth super capacitor charging and discharging circuit is connected to the first end of the super capacitor of the fifth super capacitor charging and discharging circuit;
the second end of the super capacitor of the fifth super capacitor charging and discharging circuit is connected to the first end of the super capacitor of the sixth super capacitor charging and discharging circuit;
and the second end of the super capacitor of the sixth super capacitor charging and discharging circuit is connected to the negative control bus.
After the direct current device is started, the super capacitor in the direct current device can be charged, and the voltage of the super capacitor is 0, so that a large voltage difference exists between the 45V rectifier module and the super capacitor, and if the 45V rectifier module and the super capacitor are directly connected through a lead, the charging current is very large, the normal work of other elements is influenced, and even the power grid is influenced. Meanwhile, after the device is used up, the electric energy stored in the super capacitor is timely discharged, and electric shock accidents of workers in the process of carrying the device are avoided. A current-limiting resistor is connected in series in the charging circuit to prevent the overcurrent phenomenon of the charging circuit from occurring at the beginning of charging. A normally closed switch and a normally open switch exist in the circuit, and locking exists between the normally closed switch and the normally open switch, so that a discharging loop is always formed in the circuit when the device is not used at ordinary times, and the electric energy in the super capacitor is consumed above the current-limiting resistor. When the device is powered on and started and the super capacitor needs to be charged, the normally open switch acts on and the normally closed switch acts on and jumps, and a charging circuit of the super capacitor is conducted to charge the super capacitor. When the device is used and is powered off, the normally open switch is opened and the normally closed switch is closed, a closed discharge loop is formed again, and the electric energy in the super capacitor is discharged in time.
Preferably, the direct current device further comprises a standby 45V rectifying module, and the output end of the standby 45V rectifying module is connected with a standby super capacitor charging and discharging circuit.
Preferably, the buck silicon chain circuit comprises:
the buck diodes are connected in series, the positive end of the first buck diode is connected to the positive bus, and the negative end of the last buck diode is connected to the positive control bus; each buck diode is connected in parallel with a switch. The voltage reduction silicon chain circuit enables a certain voltage difference to exist between the positive bus and the positive control bus, in order to conveniently adjust the voltage difference, each voltage reduction diode is connected with a switch in parallel, and the number of the voltage reduction diodes is adjusted by switching on and off the switches, so that the voltage difference between the positive bus and the positive control bus is conveniently adjusted.
Preferably, two reverse connection preventing circuits are arranged, and the first reverse connection preventing circuit is arranged among the positive control bus, the negative control bus and the station load; the second reverse connection preventing circuit is arranged among the positive closing bus, the negative control bus and the station load;
the reverse connection preventing circuit comprises a first voltmeter, wherein the first end of the first voltmeter is connected to the first end of a first fuse, the second end of the first fuse is connected to the first end of a second fuse, the second end of the second fuse is connected to the first end of an outgoing switch, and the second end of the outgoing switch is connected to a station load;
the second end of the first voltmeter is connected to the station load, the second end of the first voltmeter is further connected to the positive end of the protection diode, the negative end of the protection diode is connected to the second end of the first fuse, the second end of the first voltmeter is further connected to the second end of the second voltmeter, and the first end of the second voltmeter is connected to the second end of the outgoing line switch;
the first end of a first voltmeter in the first anti-reverse connection circuit is also connected to the positive control bus, and the second end of the first voltmeter is also connected to the negative control bus;
the first end of a first voltmeter in the second anti-reverse connection circuit is also connected to the positive bus, and the second end is also connected to the negative control bus.
The direct current device is characterized in that the positive pole is connected with the positive pole and the negative pole is connected with the negative pole between the outgoing line and the load, and if the positive pole and the negative pole are connected reversely, instantaneous high voltage is generated, so that the circuit is damaged and even safety accidents occur. In this feature, the first voltmeter always indicates the voltage polarity of the dc bus side, and the second voltmeter indicates the voltage polarity of the station load side after the device and the load are connected. If the polarities indicated by the first voltmeter and the second voltmeter are the same, the wiring is correct; if the polarities indicated by the first voltmeter and the second voltmeter are opposite, the outgoing line switch is not closed in a trade way, and the outgoing line needs to be connected reversely to the connected state, so that the switch can be closed. When the device is reversely connected with the outgoing line and the outgoing line switch is turned on, because the voltage difference between the two ends is huge, a larger current is generated instantaneously, so that the first fuse wire or the second fuse wire is fused, the circuit is disconnected, and the protection effect is achieved. The second fuse also has an important function of protecting the load side for the station, because when the outgoing line of the device is reversely connected and the switch is closed, the two ends of the protection diode bear positive voltage and the diode is conducted, which is equivalent to directly short-circuiting the load side for the station, and the equipment on the load side for the station can be damaged. But due to the existence of the second fuse, the second fuse is blown out under the action of larger short-circuit current, so that the load side for the station is protected.
Preferably, the direct current device comprises a main circuit box and a super capacitor box, wherein a super capacitor and a discharge circuit thereof are integrated in the super capacitor box; the other circuits of the direct current device are integrated in the main circuit box;
the discharge circuit comprises a normally closed switch and a current limiting resistor;
the charging circuit of the super capacitor in the main circuit box is connected with the discharging circuit of the super capacitor in the super capacitor box by an aviation cable; the charging circuit comprises a charging diode and a normally open switch;
a positive bus and a negative bus in the main circuit box are connected with a super capacitor in the super capacitor box through leads;
one end of the aviation cable is connected with an aviation socket positioned on the main circuit box, and the other end of the aviation cable is connected with an aviation socket positioned on the super capacitor box;
one end of the wire is connected with the junction box positioned on the main circuit box, and the other end of the wire is connected with the junction box positioned on the super capacitor box.
The structure of the direct current device is designed integrally, and all circuits and elements are arranged in two equipment boxes. The super capacitor is large in size and heavy in weight, serves as an energy storage element, and has different safety characteristics from other elements, so that the super capacitor is independently placed in one box, namely the super capacitor box; and a discharge circuit is arranged with the super capacitor to keep the internal electric quantity in a completely emptying state all the time when the super capacitor is not used at ordinary times. The remaining main circuit portion is placed in a box, called main circuit box. In order to facilitate wiring, the circuit from the main circuit box to the super capacitor box adopts an aviation cable.
Preferably, the 220V rectification module and the 45V rectification module are detachable rectification modules; the rectifier module is required to be replaced periodically, the arrangement mode of the rectifier module in the main circuit box is designed to be detachable, and the replacement of the rectifier module is realized in a mode of pushing in and pulling out from the front.
The rectification module is provided with a disassembly handle.
Preferably, a super capacitor cover plate is arranged on the top surface of the super capacitor box, and 5 series copper sheets are embedded on one surface of the cover plate facing the inside of the box, and are used for connecting the positive electrode and the negative electrode of the super capacitor in the box end to form a series circuit. Therefore, after the super capacitor is pushed into the box from the front side, the cover plate of the super capacitor at the top of the box is only required to be covered correctly, and the series connection of the super capacitors in the box is completed.
The utility model has the advantages that the direct current can be changed without power cut of the transformer substation; the automatic charging and discharging of the super capacitor in the device are realized, and the safety is high; the influence on reactive power compensation of the power grid is reduced; voltage sharing and overvoltage avoidance are realized among super capacitors in the direct current device, and the direct current device has high safety; the anti-reverse connection alarm circuit is arranged, so that dangerous accidents can be avoided when the direct current device is connected with a station load.
Furthermore, the utility model relates to a principle is reliable, and simple structure has very extensive application prospect.
Therefore, compared with the prior art, the utility model has the outstanding substantive features and remarkable progress, and the beneficial effects of the implementation are also obvious.
Drawings
Fig. 1 is a circuit diagram of a super capacitor dc device provided by the present invention.
Fig. 2 is a circuit diagram of the charging and discharging circuit of the super capacitor in fig. 1.
Fig. 3 is a circuit diagram of a first anti-reverse connection circuit in fig. 1.
Fig. 4 is an integrated schematic diagram of a super capacitor dc device provided by the present invention.
Fig. 5 is a front view of the main circuit box.
Fig. 6 is a side view of the main circuit box.
Fig. 7 is a plan view of the main circuit box.
FIG. 8 is a front view of a supercapacitor box.
FIG. 9 is a side view of a supercapacitor box.
FIG. 10 is a top view of a supercapacitor box.
Wherein, A refers to an alternating current A phase line, B refers to an alternating current B phase line, C refers to an alternating current C phase line, N refers to an alternating current power supply zero line, HM + refers to a positive closing bus, KM + refers to a positive control bus, KM-refers to a negative control bus, 1-220V rectification module, 2-step-down silicon link circuit, 2.1-step-down diode, 2.2-switch, 3-45V rectification module, 4-super capacitor charging and discharging circuit, 4.1-charging diode, 4.2-super capacitor, 4.3-current limiting resistor, 4.4-normally open switch, 4.5-normally closed switch, 5-reverse connection preventing circuit, 5.1-first voltmeter, 5.2-first fuse, 5.3-second fuse, 5.4-outgoing switch, 5.5-protection diode, 5.6-second voltmeter, 6-station load, 7-main circuit box, 8-super capacitor box, 9-aviation cable, 10-aviation socket, 11-wire, 12-junction box.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings by way of specific examples, which are illustrative of the present invention and are not limited to the following embodiments.
As shown in fig. 1 to 10, the present embodiment provides a super capacitor dc apparatus, including:
an AC phase line A, an AC phase line B, an AC phase line C, an AC power zero line, a positive bus, a positive control bus and a negative control bus,
the direct current device also comprises a 220V rectifying module 1, wherein the input end of the 220V rectifying module 1 is connected to the alternating current A phase line, the alternating current B phase line and the alternating current C phase line, and the output end of the 220V rectifying module is connected to the positive control bus and the negative control bus;
a voltage reduction silicon chain circuit 2 is arranged between the positive bus and the positive control bus;
the positive bus, the positive control bus and the negative control bus are connected to a station load through a reverse connection preventing circuit 5;
the direct current device also comprises six 45V rectifying modules 3, wherein the input end of each 45V rectifying module is connected to an alternating current A phase line, an alternating current B phase line and an alternating current C phase line; the output end of each 45V rectifying module is connected with a super capacitor charging and discharging circuit 4, and super capacitors in the six super capacitor charging and discharging circuits are connected in series and then connected between a positive bus and a negative bus.
The super capacitor charging and discharging circuit 4 comprises:
the charging diode 4.1, the positive terminal of the charging diode is connected to the positive output end of the 45V rectifier module, the negative terminal of the charging diode is connected to the first end of the super capacitor 4.2, the second end of the super capacitor is connected to the first end of the current-limiting resistor 4.3, the second end of the current-limiting resistor is connected to the first end of the normally open switch 4.4, the second end of the normally open switch is connected to the negative output end of the 45V rectifier module, the normally closed switch 4.5 is connected between the first end of the super capacitor and the second end of the current-limiting resistor, the first end of the normally closed switch is connected to the first end of the super capacitor, and the second end of the normally closed; a locking structure is formed between the normally open switch and the normally closed switch;
the first end of the super capacitor of the first path of super capacitor charging and discharging circuit is connected to the positive bus, and the second end of the super capacitor of the first path of super capacitor charging and discharging circuit is connected to the first end of the super capacitor of the second path of super capacitor charging and discharging circuit;
the second end of the super capacitor of the second super capacitor charging and discharging circuit is connected to the first end of the super capacitor of the third super capacitor charging and discharging circuit;
the second end of the super capacitor of the third super capacitor charging and discharging circuit is connected to the first end of the super capacitor of the fourth super capacitor charging and discharging circuit;
the second end of the super capacitor of the fourth super capacitor charging and discharging circuit is connected to the first end of the super capacitor of the fifth super capacitor charging and discharging circuit;
the second end of the super capacitor of the fifth super capacitor charging and discharging circuit is connected to the first end of the super capacitor of the sixth super capacitor charging and discharging circuit;
and the second end of the super capacitor of the sixth super capacitor charging and discharging circuit is connected to the negative control bus.
After the direct current device is started, the super capacitor in the direct current device can be charged, and the voltage of the super capacitor is 0, so that a large voltage difference exists between the 45V rectifier module and the super capacitor, and if the 45V rectifier module and the super capacitor are directly connected through a lead, the charging current is very large, the normal work of other elements is influenced, and even the power grid is influenced. Meanwhile, after the device is used up, the electric energy stored in the super capacitor is timely discharged, and electric shock accidents of workers in the process of carrying the device are avoided. A current-limiting resistor is connected in series in the charging circuit to prevent the overcurrent phenomenon of the charging circuit from occurring at the beginning of charging. A normally closed switch and a normally open switch exist in the circuit, and locking exists between the normally closed switch and the normally open switch, so that a discharging loop is always formed in the circuit when the device is not used at ordinary times, and the electric energy in the super capacitor is consumed above the current-limiting resistor. When the device is powered on and started and the super capacitor needs to be charged, the normally open switch acts on and the normally closed switch acts on and jumps, and a charging circuit of the super capacitor is conducted to charge the super capacitor. When the device is used and is powered off, the normally open switch is opened and the normally closed switch is closed, a closed discharge loop is formed again, and the electric energy in the super capacitor is discharged in time.
The direct current device further comprises a standby 45V rectifying module, and the output end of the standby 45V rectifying module is connected with a standby super capacitor charging and discharging circuit.
The step-down silicon chain circuit 2 comprises:
the buck diodes are connected in series, the positive end of the first buck diode is connected to the positive bus, and the negative end of the last buck diode is connected to the positive control bus; each buck diode is connected in parallel with a switch 2.2. The voltage reduction silicon chain circuit enables a certain voltage difference to exist between the positive bus and the positive control bus, in order to conveniently adjust the voltage difference, each voltage reduction diode is connected with a switch in parallel, and the number of the voltage reduction diodes is adjusted by switching on and off the switches, so that the voltage difference between the positive bus and the positive control bus is conveniently adjusted.
The first reverse connection preventing circuit is arranged among the positive control bus, the negative control bus and the station load; the second reverse connection preventing circuit is arranged among the positive closing bus, the negative control bus and the station load;
the reverse connection preventing circuit 5 comprises a first voltmeter 5.1, wherein a first end of the first voltmeter is connected to a first end of a first fuse 5.2, a second end of the first fuse is connected to a first end of a second fuse 5.3, a second end of the second fuse is connected to a first end of an outgoing switch 5.4, and a second end of the outgoing switch is connected to a station load 6;
the second end of the first voltmeter is connected to the station load, the second end of the first voltmeter is further connected to the positive end of the protection diode 5.5, the negative end of the protection diode is connected to the second end of the first fuse, the second end of the first voltmeter is further connected to the second end of the second voltmeter 5.6, and the first end of the second voltmeter is connected to the second end of the outgoing line switch;
the first end of a first voltmeter in the first anti-reverse connection circuit is also connected to the positive control bus, and the second end of the first voltmeter is also connected to the negative control bus;
the first end of a first voltmeter in the second anti-reverse connection circuit is also connected to the positive bus, and the second end is also connected to the negative control bus.
The direct current device is characterized in that the positive pole is connected with the positive pole and the negative pole is connected with the negative pole between the outgoing line and the load, and if the positive pole and the negative pole are connected reversely, instantaneous high voltage is generated, so that the circuit is damaged and even safety accidents occur. In this feature, the first voltmeter always indicates the voltage polarity of the dc bus side, and the second voltmeter indicates the voltage polarity of the station load side after the device and the load are connected. If the polarities indicated by the first voltmeter and the second voltmeter are the same, the wiring is correct; if the polarities indicated by the first voltmeter and the second voltmeter are opposite, the outgoing line switch is not closed in a trade way, and the outgoing line needs to be connected reversely to the connected state, so that the switch can be closed. When the device is reversely connected with the outgoing line and the outgoing line switch is turned on, because the voltage difference between the two ends is huge, a larger current is generated instantaneously, so that the first fuse wire or the second fuse wire is fused, the circuit is disconnected, and the protection effect is achieved. The second fuse also has an important function of protecting the load side for the station, because when the outgoing line of the device is reversely connected and the switch is closed, the two ends of the protection diode bear positive voltage and the diode is conducted, which is equivalent to directly short-circuiting the load side for the station, and the equipment on the load side for the station can be damaged. But due to the existence of the second fuse, the second fuse is blown out under the action of larger short-circuit current, so that the load side for the station is protected.
The direct current device comprises a main circuit box 7 and a super capacitor box 8, wherein a super capacitor and a discharge circuit thereof are integrated in the super capacitor box; the other circuits of the direct current device are integrated in the main circuit box;
the discharge circuit comprises a normally closed switch and a current limiting resistor;
the charging circuit of the super capacitor in the main circuit box is connected with the discharging circuit of the super capacitor in the super capacitor box by an aviation cable 9; the charging circuit comprises a charging diode and a normally open switch;
a positive bus and a negative bus in the main circuit box are connected with a super capacitor in the super capacitor box through a lead 11;
one end of the aviation cable is connected with an aviation socket 10 positioned on the main circuit box, and the other end of the aviation cable is connected with an aviation socket positioned on the super capacitor box;
one end of the wire is connected to the junction box 12 located on the main circuit box, and the other end is connected to the junction box located on the super capacitor box.
The structure of the direct current device is designed integrally, and all circuits and elements are arranged in two equipment boxes. The super capacitor is large in size and heavy in weight, serves as an energy storage element, and has different safety characteristics from other elements, so that the super capacitor is independently placed in one box, namely the super capacitor box; and a discharge circuit is arranged with the super capacitor to keep the internal electric quantity in a completely emptying state all the time when the super capacitor is not used at ordinary times. The remaining main circuit portion is placed in a box, called main circuit box. In order to facilitate wiring, the circuit from the main circuit box to the super capacitor box adopts an aviation cable.
The 220V rectifying module and the 45V rectifying module are detachable rectifying modules; the rectifier module is required to be replaced periodically, the arrangement mode of the rectifier module in the main circuit box is designed to be detachable, and the replacement of the rectifier module is realized in a mode of pushing in and pulling out from the front.
The rectification module is provided with a disassembly handle.
A super capacitor cover plate is arranged on the top surface of the super capacitor box, and 5 series copper sheets are embedded into one surface of the cover plate facing the inside of the box, and the function of the cover plate is to connect the positive electrode and the negative electrode of the super capacitor in the box end to form a series circuit. Therefore, after the super capacitor is pushed into the box from the front side, the cover plate of the super capacitor at the top of the box is only required to be covered correctly, and the series connection of the super capacitors in the box is completed.
The above disclosure is only for the preferred embodiments of the present invention, but the present invention is not limited thereto, and any person skilled in the art can think of the inventive changes, and several improvements and decorations made without departing from the principle of the present invention should fall within the protection scope of the present invention.
Claims (7)
1. A supercapacitor DC device, comprising:
an AC phase line A, an AC phase line B, an AC phase line C, an AC power zero line, a positive bus, a positive control bus and a negative control bus,
the direct current device also comprises a 220V rectifying module, wherein the input end of the 220V rectifying module is connected to the alternating current A phase line, the alternating current B phase line and the alternating current C phase line, and the output end of the 220V rectifying module is connected to the positive control bus and the negative control bus;
a voltage reduction silicon chain circuit is arranged between the positive bus and the positive control bus;
the positive bus, the positive control bus and the negative control bus are connected to a station load through a reverse connection preventing circuit;
the direct current device also comprises six 45V rectifying modules, wherein the input end of each 45V rectifying module is connected to an alternating current A phase line, an alternating current B phase line and an alternating current C phase line; the output end of each 45V rectifying module is connected with a super capacitor charging and discharging circuit, and super capacitors in the six super capacitor charging and discharging circuits are connected in series and then connected between a positive bus and a negative bus.
2. The supercapacitor direct current device according to claim 1, wherein the supercapacitor charge and discharge circuit comprises:
the positive end of the charging diode is connected to the positive output end of the 45V rectifying module, the negative end of the charging diode is connected to the first end of the super capacitor, the second end of the super capacitor is connected to the first end of the current-limiting resistor, the second end of the current-limiting resistor is connected with the first end of the normally open switch, the second end of the normally open switch is connected to the negative output end of the 45V rectifying module, a normally closed switch is connected between the first end of the super capacitor and the second end of the current-limiting resistor, the first end of the normally closed switch is connected to the first end of the super capacitor, and the second end of the normally closed switch is connected to; a locking structure is formed between the normally open switch and the normally closed switch;
the first end of the super capacitor of the first path of super capacitor charging and discharging circuit is connected to the positive bus, and the second end of the super capacitor of the first path of super capacitor charging and discharging circuit is connected to the first end of the super capacitor of the second path of super capacitor charging and discharging circuit;
the second end of the super capacitor of the second super capacitor charging and discharging circuit is connected to the first end of the super capacitor of the third super capacitor charging and discharging circuit;
the second end of the super capacitor of the third super capacitor charging and discharging circuit is connected to the first end of the super capacitor of the fourth super capacitor charging and discharging circuit;
the second end of the super capacitor of the fourth super capacitor charging and discharging circuit is connected to the first end of the super capacitor of the fifth super capacitor charging and discharging circuit;
the second end of the super capacitor of the fifth super capacitor charging and discharging circuit is connected to the first end of the super capacitor of the sixth super capacitor charging and discharging circuit;
and the second end of the super capacitor of the sixth super capacitor charging and discharging circuit is connected to the negative control bus.
3. The supercapacitor direct current device according to claim 2, further comprising a standby 45V rectifier module, wherein an output end of the standby 45V rectifier module is connected with a standby supercapacitor charge-discharge circuit.
4. The supercapacitor direct current device according to claim 3, wherein the buck silicon chain circuit comprises:
the buck diodes are connected in series, the positive end of the first buck diode is connected to the positive bus, and the negative end of the last buck diode is connected to the positive control bus; each buck diode is connected in parallel with a switch.
5. The supercapacitor direct current device according to claim 4, wherein two reverse connection preventing circuits are provided, and a first reverse connection preventing circuit is arranged between the positive control bus, the negative control bus and the station load; the second reverse connection preventing circuit is arranged among the positive closing bus, the negative control bus and the station load;
the reverse connection preventing circuit comprises a first voltmeter, wherein the first end of the first voltmeter is connected to the first end of a first fuse, the second end of the first fuse is connected to the first end of a second fuse, the second end of the second fuse is connected to the first end of an outgoing switch, and the second end of the outgoing switch is connected to a station load;
the second end of the first voltmeter is connected to the station load, the second end of the first voltmeter is further connected to the positive end of the protection diode, the negative end of the protection diode is connected to the second end of the first fuse, the second end of the first voltmeter is further connected to the second end of the second voltmeter, and the first end of the second voltmeter is connected to the second end of the outgoing line switch;
the first end of a first voltmeter in the first anti-reverse connection circuit is also connected to the positive control bus, and the second end of the first voltmeter is also connected to the negative control bus;
the first end of a first voltmeter in the second anti-reverse connection circuit is also connected to the positive bus, and the second end is also connected to the negative control bus.
6. The supercapacitor direct current device according to claim 5, wherein the direct current device comprises a main circuit box and a supercapacitor box, and a supercapacitor and a discharge circuit thereof are integrated in the supercapacitor box; the other circuits of the direct current device are integrated in the main circuit box;
the discharge circuit comprises a normally closed switch and a current limiting resistor;
the charging circuit of the super capacitor in the main circuit box is connected with the discharging circuit of the super capacitor in the super capacitor box by an aviation cable; the charging circuit comprises a charging diode and a normally open switch;
a positive bus and a negative bus in the main circuit box are connected with a super capacitor in the super capacitor box through leads;
one end of the aviation cable is connected with an aviation socket positioned on the main circuit box, and the other end of the aviation cable is connected with an aviation socket positioned on the super capacitor box;
one end of the wire is connected with the junction box positioned on the main circuit box, and the other end of the wire is connected with the junction box positioned on the super capacitor box.
7. The supercapacitor direct current device according to claim 6, wherein the 220V rectifier module and the 45V rectifier module are detachable rectifier modules.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021588729.2U CN212627161U (en) | 2020-08-03 | 2020-08-03 | Super capacitor direct current device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021588729.2U CN212627161U (en) | 2020-08-03 | 2020-08-03 | Super capacitor direct current device |
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| CN212627161U true CN212627161U (en) | 2021-02-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111884199A (en) * | 2020-08-03 | 2020-11-03 | 国网山东省电力公司寿光市供电公司 | Super capacitor direct current device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111884199A (en) * | 2020-08-03 | 2020-11-03 | 国网山东省电力公司寿光市供电公司 | Super capacitor direct current device |
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Granted publication date: 20210226 Termination date: 20210803 |