CN109461584B - Intelligent controllable fuse type high-voltage-resistant capacitor and controllable fuse - Google Patents
Intelligent controllable fuse type high-voltage-resistant capacitor and controllable fuse Download PDFInfo
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- CN109461584B CN109461584B CN201811304181.1A CN201811304181A CN109461584B CN 109461584 B CN109461584 B CN 109461584B CN 201811304181 A CN201811304181 A CN 201811304181A CN 109461584 B CN109461584 B CN 109461584B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/40—Structural combinations of fixed capacitors with other electric elements, the structure mainly consisting of a capacitor, e.g. RC combinations
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
- H01G2/14—Protection against electric or thermal overload
- H01G2/16—Protection against electric or thermal overload with fusing elements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/33—Thin- or thick-film capacitors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/38—Multiple capacitors, i.e. structural combinations of fixed capacitors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/0241—Structural association of a fuse and another component or apparatus
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/16—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for capacitors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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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
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- Engineering & Computer Science (AREA)
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- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
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Abstract
The invention provides an intelligent controllable fuse type high-voltage capacitor.A fuse is respectively connected with a capacitor anode insulator and a fuse detection control device, and the fuse detection control device is connected with a DSP intelligent controller; the fusing control component of the fuse comprises a fusing part, a current limiting resistor and a JFET field effect transistor module; the input of fuse-link is connected with condenser positive pole insulator, and the output is connected with the input of current-limiting resistance, and the output of current-limiting resistance is connected with the input of JFET field effect transistor module, and the output and the fuse main part of JFET field effect transistor module are connected, and the control pole and the DSP intelligent control ware of JFET field effect transistor module are connected. A controllable fuse is also provided. The invention has high voltage resistance and strong current impact resistance, thoroughly solves the problems of inconvenient measurement and control and easy breakdown and damage of the existing high-voltage capacitor technology, and improves the controllability and the safety of the capacitor.
Description
Technical Field
The invention relates to the field of power electronics and the technical field of high-voltage capacitors, in particular to an intelligent controllable fuse type high-voltage capacitor and a controllable fuse.
Background
With the implementation of the high-speed development in China and the world development planning in China all the way, the yield of metals such as steel, iron, aluminum and the like in China is developed to be more than 50% of the world yield, and the development speed of a high-speed electric train railway is the first in the world. Due to the particularity of the electric railway and the metal smelting system, a large amount of higher harmonics and reactive power are generated, so that the power grid is greatly impacted and interfered, and the safety and stability of the power grid are seriously influenced. In order to compensate harmonic wave and reactive power of a power grid, the power grid adopts a large number of high-voltage capacitors, and due to various problems and defects of the conventional capacitors, the improvement of the performance of the high-voltage capacitors becomes an important subject in the modern power grid.
After retrieval:
the publication is patent CN103440936A, entitled ceramic insulator and high-voltage power capacitor insulator device; the insulator device comprises a ceramic insulator body, a wiring assembly and a mounting assembly; the mounting assembly comprises a metal mounting seat and a sealing ring; the metal mounting seat is tubular, and the sealing ring is positioned between the lower surface of the annular positioning boss and the blocking part; the invention is convenient to install. But the performance of the capacitor is not improved, and the problems that the capacitor cannot be detected and is easy to damage still exist.
The publication number is CN200947544 patent, the name is high-voltage integrated adjustable capacitor type electric reactive compensator, a utility model discloses an adjustable capacitor type electric reactive compensator, mainly applicable to reactive compensation and voltage adjustment in 10-35KV electric network. The compensator is divided into a fixed part and an adjustable part, a capacitor of the fixed part is a high-voltage capacitor, a capacitor of the adjustable part is a low-voltage capacitor, the regulation and control of the capacitor are realized by a combined switch, and the regulation and control are completed at low voltage, so that the impact on a power grid is small, and the structure is simple. Although the patent has small impact on a power grid, the problems of small adjustment range and easy damage of a high-voltage capacitor still exist.
The publication number is CN2687829 patent, the name is large capacity high voltage capacitor protection fuse, discloses a large capacity high voltage capacitor protection fuse, sets up the screw terminal at the fuse top as the fuse connector to adopt screw thread zonulae occludens with the screw of pipe cap and arc-extinguishing pipe inner wall, the fuse connector of this kind of fuse is little with pipe cap contact resistance, can not cause local overheat to arouse the fuse to break by mistake when passing through heavy current, the difficult not hard up of arc-extinguishing pipe drops. But the performance of the capacitor is not improved, and the problems that the capacitor cannot be detected and is easy to damage still exist.
At present, in order to compensate harmonic waves and reactive power of a power grid, a national power grid, a railway electric car and a metal smelting system adopt a large number of capacitors, reactive power compensation devices, LC filters, SVG, SVC and other compensation devices, and the compensation devices are all composed of high-voltage capacitors.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an intelligent controllable fuse type high-voltage capacitor and a controllable fuse.
The invention is realized by the following technical scheme.
According to an aspect of the present invention, there is provided an intelligent controllable fuse type high voltage resistant capacitor, including: the device comprises a capacitor anode insulator, a capacitor cathode insulator, a fuse detection control device, a discharger, a discharge detection device, a DSP intelligent controller and a high-voltage capacitor core component; wherein:
the capacitor positive electrode insulator is connected with the positive electrode of the high-voltage capacitor core part, the negative electrode of the high-voltage capacitor core part is connected with the capacitor negative electrode insulator, an internal discharge device is arranged between the capacitor positive electrode insulator and the capacitor negative electrode insulator, the discharge detection device is connected with the internal discharge device, and the discharge detection device is connected with the DSP intelligent controller;
the fuse is respectively connected with the capacitor anode insulator, the fuse detection control device and the DSP intelligent controller, and the fuse detection control device is connected with the DSP intelligent controller;
the fuse includes a fuse control part and a fuse main body; the fusing control part includes: the fuse element, the current limiting resistor and the JFET field effect transistor module; wherein:
the input of fuse-link is connected with condenser positive pole insulator, and the output of fuse-link is connected with current-limiting resistance's input, current-limiting resistance's output is connected with the input of JFET field effect transistor module, the output and the fuse main part of JFET field effect transistor module are connected, the control pole and the DSP intelligent control ware of JFET field effect transistor module are connected, through the control of DSP intelligent control ware to JFET field effect transistor module, adjust fuse main part electric current.
Preferably, the fuse body includes a fuse part, an upper connecting member and a lower connecting member; the capacitor anode insulator comprises an insulating porcelain insulator, an upper screw, a lower screw, an upper fixing nut, a lower fixing nut, an upper sealing element, a lower sealing element, an upper sealing gasket, a lower sealing gasket, a detection device outer cover and an insulator fixing seat;
the fuse component is arranged in the insulating porcelain insulator, and the upper end and the lower end of the fuse component form an integrated structure with the upper connecting piece and the lower connecting piece respectively; the upper screw is screwed into the inner screw of the upper connecting piece, and the outer end part of the upper screw is positioned outside the upper end of the insulating porcelain bottle and is fixed and pressed by an upper fixing nut; the screw rod of the lower connecting piece is screwed into the internal thread on the upper part of the lower screw rod, the outer end part of the lower screw rod is positioned outside the lower end of the porcelain insulator, and the insulator fixing seat is installed on the outer end part of the lower screw rod and is fixed and pressed through a lower fixing nut; the detection device outer cover is arranged between the insulator fixing seat and the insulating porcelain insulator, and the fuse detection control device is arranged in the detection device outer cover; an upper sealing element is arranged between the upper end of the insulating porcelain bottle and the upper fixing nut, and an upper sealing gasket is arranged between the upper sealing element and the upper fixing nut; a lower sealing element is arranged between the insulator fixing seat and the lower fixing nut, and a lower sealing gasket is arranged between the lower sealing element and the lower fixing nut;
the fuse control component of the fuse is arranged in the fuse component, the input end of the fuse is connected with the upper screw rod through the upper connecting piece, and the output end of the JFET field effect transistor module is connected with the lower connecting piece;
the fuse detection control device is arranged outside the capacitor anode insulator.
Preferably, the high withstand voltage capacitor core member includes: the capacitor comprises a capacitor core, high-conductivity non-inductive copper foil and an insulating medium; wherein:
the high-conductivity non-inductive copper foil comprises a positive plate and a negative plate, and an insulating medium is arranged between the positive plate and the negative plate; the capacitor core is vertically arranged between the positive plate and the negative plate which are arranged in parallel to form a capacitor core single body; the positive plate adopts an inner lead shaft type non-inductive copper foil welding shaft to form a capacitor core positive electrode of the capacitor core monomer, and the negative plate adopts an outer lead shaft type non-inductive copper foil welding shaft to form a capacitor core negative electrode of the capacitor core monomer;
a plurality of capacitor core monomers connected in parallel form a layer of capacitor core structure, and the negative electrode of the capacitor core in the upper layer of capacitor core structure is connected with the positive electrode of the capacitor core in the lower layer of capacitor core structure through a joint;
the capacitor core structure comprises a plurality of layers of capacitor core structures which are connected in series to form a capacitor core assembly, wherein the capacitor core monomer on each layer of capacitor core structure is provided with at least one layer of rated insulating medium, and the number of insulating medium layers arranged on the capacitor core monomer on the middle layer of capacitor core structure is less than that of insulating medium layers arranged on the capacitor core monomer on the first layer of capacitor core structure and the last layer of capacitor core structure.
More preferably, the insulating medium is a high-molecular metallized polypropylene insulating film.
More preferably, the number of capacitor core monomers connected in parallel in each layer of capacitor core structure is determined by the required capacitance and current; the number of capacitor core structure layers connected in series in the capacitor core assembly is determined by the required rated voltage.
More preferably, the multilayer capacitor core structure is an N-layer capacitor core structure, the insulating medium provided by the capacitor core monomers on the 1 st layer and the nth layer of the N-layer capacitor core structure is a 2-fold layer or a 3-fold layer, and the insulating medium provided by the capacitor core monomers on the 2 nd layer to the N-1 st layer of the N-layer capacitor core structure is a 1-fold layer, where N is a natural number.
Preferably, the capacitor further comprises a fusing display and a discharging display; wherein:
and the fusing display and the discharging display are respectively connected with the DSP intelligent controller.
More preferably, any one or more of the following features are also included:
when the capacitor or the fuse breaks down, the DSP intelligent controller controls the JFET field effect transistor module to be switched off, so that the capacitor is separated from the circuit, and the fusing display sends an alarm signal;
when the capacitor fails or when the JFET field effect transistor module is out of control, the fuse current reaches a protection fuse value, the fuse element is disconnected, the fuse detection control device sends a signal to the DSP intelligent controller to perform protection operation on a power grid and a circuit, and the fuse display sends an alarm signal;
when the capacitor voltage changes and exceeds a specified range, the DSP intelligent controller controls the discharger to release the capacitor voltage and the stored electricity quantity, and regulates and controls the voltage at the two ends of the capacitor; when the capacitor is powered off, the DSP intelligent controller controls the discharger to discharge the capacitor, so that the voltage of the capacitor is reduced to be lower than a set voltage within a set time, and the discharge display displays a working state;
when the three-phase current or voltage unbalance of the capacitor occurs, the DSP intelligent controller controls the JFET field effect transistor module to adjust and control the three-phase charging current of the capacitor according to the three-phase current or voltage unbalance measurement and data of the capacitor detected by the fuse detection device and the discharge detection device, so that the three-phase current or voltage balance degree is adjusted.
More preferably, the predetermined time is 5 to 10 minutes, and the set voltage is 30V.
Preferably, the high-voltage capacitor comprises a capacitor shell, wherein the discharger, the discharge detection device and the high-voltage capacitor core part are respectively arranged in the capacitor shell;
an oil-immersed structure or a dry structure is adopted in the capacitor shell.
According to another aspect of the present invention, there is provided a controllable fuse including a blowing control member and a fuse main body; the fusing control part includes: the fuse element, the current limiting resistor and the JFET field effect transistor module; wherein:
the input and power equipment or power line of fuse-link are connected, the output and the input of current-limiting resistance of fuse-link are connected, the output and the input of JFET field effect transistor module of current-limiting resistance are connected, the output and the power equipment or power line of JFET field effect transistor module are connected, the control pole and the external control ware of JFET field effect transistor module are connected, through the control of external control ware to JFET field effect transistor module, adjust fuse bulk current.
Preferably, the fuse body includes a fuse part, an upper connecting member and a lower connecting member; wherein:
the upper end and the lower end of the fuse component form an integrated structure with the upper connecting piece and the lower connecting piece respectively; the fusing control part is arranged inside the fuse part, the input end of the fusing part is connected with power equipment or a power line through an upper connecting piece, and the output end of the JFET field effect transistor module is connected with the power equipment or the power line through a lower connecting piece.
The intelligent controllable fuse type high-voltage-withstanding capacitor provided by the invention adopts a brand new structure, and a fuse detection control device and a DSP intelligent controller are utilized to monitor, control and protect the high-voltage capacitor and the fuse; the capacitor core assembly is composed of a specific design structure and an insulating medium; when the current of the capacitor changes and is abnormal, the DSP intelligent controller controls the fuse and the high-voltage high-power JFET field effect transistor module to regulate and control the current of the fuse and the voltage of the capacitor; therefore, the three-phase current and voltage balance degree of the capacitor can be adjusted, and the current control performance and the current impact resistance of the capacitor are improved. When the capacitor fails, the DSP intelligent controller controls the fuse and the JFET field effect transistor module to disconnect the JFET field effect transistor module, so that the capacitor is separated from a power grid, and the purpose of protecting the power grid is achieved; the invention has the advantages of strong high voltage resistance and current impact resistance, small volume, good high-frequency performance, safety and reliability. The method can be applied to high-speed rail trains, metal smelting systems, national grid harmonic and reactive power compensation and various high-voltage high-power devices.
Compared with the prior art, the invention has at least one of the following beneficial effects:
1. the fuse can be arranged inside the capacitor anode insulator, and the fuse detection control device can be arranged outside the capacitor anode insulator, so that the installation and maintenance are convenient; the DSP intelligent controller is used for monitoring, adjusting and protecting the fuse; the DSP intelligent controller regulates and controls the high-voltage high-power JFET field effect transistor device and the current according to the requirement and the specification of the fuse current, so that the current control performance, the high-voltage resistance, the current impact resistance and the breakdown prevention protection capability of the fuse and the high-voltage capacitor are improved.
2. The upper connecting piece and the lower connecting piece of the fuse are integrated with the fuse component; a compression surface is formed between the upper screw rod of the insulator and the fuse component through the internal thread, so that the contact area between the upper screw rod and the fuse is increased; the connecting rod increases the pressing surface and increases the area of contact of fuse and lower screw rod through the screw thread of connecting fastener under the fuse, increase contact conduction current volume.
3. The current limiting resistor and the high-voltage high-power JFET field effect transistor of the fuse can adopt 1-N pieces, and continuous high-precision large-capacity current regulation and control can be carried out within the current limiting range.
4. When the current and voltage values of the capacitor are changed or abnormal, the DSP intelligent controller can control and adjust the current of the JFET field effect transistor device according to requirements; when the capacitor fails, the DSP controller controls the JFET field effect transistor device to be turned off, so that the capacitor is separated from a power grid and a circuit, meanwhile, the display is fused, and an alarm signal is sent out.
5. When the high-voltage capacitor or the fuse breaks down and the current of the capacitor exceeds a specified tolerance value, the fuse element is fused, so that the capacitor is separated from a power grid, and the capacitor and the power grid are protected; and simultaneously, the fuse display displays and sends out an alarm signal.
6. Fuse and fuse detection device output signal send DSP intelligent control ware to detect and control the condenser, have thoroughly solved the inconvenient detection of current high-voltage capacitor technique and uncontrollable problem to can monitor condenser operating condition and three-phase capacitor current-voltage unbalance state. When the three-phase current and voltage of the capacitor are in an unbalanced state, the DSP intelligent controller adjusts and controls the running current of the high-voltage high-power JFET so as to adjust the current and voltage of the capacitor and adjust and control the three-phase current and voltage balance of the capacitor.
7. When the voltage of the capacitor exceeds a specified range, the DSP intelligent controller controls the discharger to discharge and regulate the voltage; when the capacitor is powered off, the discharger releases the electric energy stored in the capacitor, the voltage is reduced to be below 30V within the specified time of 5-10 minutes, and the discharge display flickers to prompt the working state (the flickering frequency and the flickering times can be set), so that the operation of workers is facilitated.
8. The invention can be applied to other electric power and electrical equipment or electric power circuit systems, and can also be applied to various electric equipment and electric power circuits except for high-voltage insulators.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a structural diagram of an intelligent controllable fuse type high voltage capacitor according to an embodiment of the present invention;
in fig. 1: 1 is a capacitor anode insulator, 2 is a fuse, 3 is a fuse detection control device, 4 is a discharger, 5 is a discharge detection device, 6 is a DSP intelligent controller, 7 is a capacitor core assembly, 7-1 is a positive plate, 7-2 is a negative plate, 8 is a fusing display, 9 is a discharge display, and 12 is a capacitor shell;
fig. 2 is a structural cross-sectional view of an intelligent controllable fuse type high voltage capacitor according to an embodiment of the present invention;
in fig. 2: 1 is a capacitor anode insulator, 2 is a fuse, 3 is a fuse detection control device, 4 is a discharger, 5 is a discharge detection device, 6 is a DSP intelligent controller, 7 is a capacitor core assembly, 7-3 is a capacitor core anode, 7-4 is a capacitor core cathode, 8 is a fusing display, 9 is a discharge display, 11 is a high-molecular metallized polypropylene insulating film, and 12 is a capacitor shell;
fig. 3 is a structural diagram of a capacitor positive electrode insulator 1 according to an embodiment of the present invention;
in fig. 3: 1-1-1 is an upper sealing element, 1-1-2 is a lower sealing element, 1-2-1 is an upper screw, 1-2-2 is a lower screw, 1-2-3 is an upper fixing nut, 1-2-4 is a lower fixing nut, 1-3 is a detection device outer cover, and 1-4 is an insulator fixing seat;
fig. 4 is a sectional view of an internal structure of a capacitor positive electrode insulator 1 according to an embodiment of the present invention;
in fig. 4: 1-1-1 is an upper sealing element, 1-1-2 is a lower sealing element, 1-2-1 is an upper screw, 1-2-2 is a lower screw, 1-2-3 is an upper fixing nut, 1-2-4 is a lower fixing nut, 1-3 is a detection device outer cover, 1-4 is an insulator fixing seat, 2-1-1 is an upper connecting element, 2-1-2 is a fuse lower connecting element, 2 is a fuse, and 3 is a fuse detection control device;
FIG. 5 is a schematic diagram of a fuse control component of a controllable fuse according to an embodiment of the present invention;
in FIG. 5, 2-1-1 is an upper connector, 2-1-2 is a lower connector, 2-2 is a fuse, 2-3-1 and 2-3-2 are current limiting resistors, 2-4-1 and 2-4-2 are high voltage and high power JFET FETs, 2-5-1 and 2-5-2 are control electrodes of JFET FETs;
FIG. 6 is a schematic diagram of the internal structure of a high voltage high power JFET FET according to an embodiment of the present invention;
in fig. 6, 2 to 6 are high withstand voltage insulators;
FIG. 7 is a schematic structural diagram of an interlayer capacitor core structure according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a first-layer and last-layer capacitor core structure according to an embodiment of the present invention.
Detailed Description
The following examples illustrate the invention in detail: the embodiment is implemented on the premise of the technical scheme of the invention, and a detailed implementation mode and a specific operation process are given. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Example 1
Referring to fig. 1 to 8, a schematic diagram of an embodiment of the intelligent controllable fuse type high voltage resistant capacitor of the present invention is shown. Controllable fuse formula high voltage capacitor of intelligence includes positive insulator 1 of condenser, fuse 2, fuse detection controlling means 3, discharger 4, detection device 5 that discharges, DSP intelligent control ware 6, high voltage capacitor core spare, fusing display 8, discharging display 9 and capacitor shell 12, wherein:
the capacitor anode insulator 1, the fuse 2 and the fuse detection control device 3 form a controllable fuse assembly;
the capacitor positive electrode insulator 1 includes: the insulator comprises an insulating porcelain insulator, an upper sealing element 1-1-1, a lower sealing element 1-1-2, an upper sealing gasket, a lower sealing gasket, an insulator fixing seat 1-4, an upper screw rod 1-2-1, a lower screw rod 1-2-2, an upper fixing screw cap 1-2-3 and a lower fixing screw cap 1-2-4; a detection device housing 1-3;
the fuse 2 includes: the fuse comprises a fuse component, an upper connecting piece 2-1-1, a lower connecting piece 2-1-2, a fuse piece 2-2, current limiting resistors 2-3-1 and 2-3-2, and high-voltage high-power JFET field effect transistors 2-4-1 and 2-4-2;
the fuse element 2-2, the current limiting resistors 2-3-1 and 2-3-2 and the high-voltage high-power JFET field effect transistors 2-4-1 and 2-4-2 form a fusing control component of the fuse 2.
The fuse 2 can be arranged inside the capacitor anode insulator 1, the fuse detection control device 3 can be arranged outside the capacitor anode insulator 1, and the detection device outer cover 1-3 is arranged outside the fuse 2, so that the installation, replacement and maintenance are convenient; a discharger 4, a discharge detection device 5 and a high-voltage-resistance capacitor core part are arranged in the capacitor shell 12, and a DSP intelligent controller 6, a fusing display 8 and a discharge display 9 are arranged outside the capacitor shell 12; the positive and negative plates 7-1 and 7-2 of the high voltage-resistant capacitance core component adopt high-conductivity noninductive copper foils, a special high-polymer metalized polypropylene high-voltage-resistant insulating film 11 is adopted between the positive and negative plates to form a high-voltage-resistant insulating medium, and the capacitor core component 7 adopts a special design structure, so that the high voltage resistance and the current impact resistance of the capacitor are greatly improved; in one embodiment, signals and data of the fuse detection control device 3 and the discharge detection device 5 are sent to the DSP intelligent controller 6 for calculation and analysis, the DSP intelligent controller 6 monitors, adjusts and controls the voltage, current and operation state of the fuse 2, the discharger 4 and the high-voltage capacitor, and performs adjustment control and protection operation according to the capacitor and power grid rules.
The fuse detection control device 3 transmits current and voltage of the capacitor and the fuse, and running state signals and data to the DSP intelligent controller 6 for calculation and analysis, calculates a control instruction of the JFET module, and adjusts and controls the current and the capacitor voltage of the fuse by the JFET module; when the voltage and current of the capacitor or the fuse are changed or abnormal, the DSP intelligent controller 6 sends a control and regulation instruction to the JFET field effect transistor module, and regulates, controls and protects the current of the fuse 2 and the JFET field effect transistor modules 2-4-1 and 2-4-2;
when the capacitor or the fuse 2 breaks down, the DSP intelligent controller 6 controls the JFET field effect transistor module 2-4-1 and the JFET field effect transistor module 2-4-2 to be switched off, so that the capacitor is separated from a circuit, and the fusing display 8 sends an alarm signal.
When the capacitor fails or when the fuse JFET field effect transistor modules 2-4-1 and 2-4-2 are out of control, the current of the fuse 2 reaches a protection fusing value, the fuse 2-2 is disconnected, a signal of the fuse detection control device 3 is sent to the DSP intelligent controller 6, the power grid and the circuit are protected, and the fuse displayer 8 sends out an alarm signal.
A discharger 4 and a discharger detection device 5 are arranged in the high-voltage capacitor; the discharger 4 and the detection control device 5 output signals to the DSP controller 6 for calculation and analysis, when the capacitor voltage changes and exceeds a specified range, the DSP intelligent controller 6 controls the discharger to release the capacitor voltage and the stored electricity quantity, and the voltage at the two ends of the capacitor is regulated and controlled; when the capacitor is powered off, the DSP intelligent controller 6 controls the discharger 4 to discharge the high-voltage capacitor, the voltage is reduced to be below 30V within 5-10 minutes, and the display lamp 9 is turned off so as to facilitate the operation of a worker.
When the three-phase current and voltage of the capacitor are in an unbalanced state, the DSP intelligent controller 6 controls the JFET field effect tubes 2-4-1 and 2-4-2 to adjust and control the three-phase charging current of the capacitor according to the unbalanced measurement and data of the three-phase current and voltage of the capacitor detected by the fuse detection device 3 and the discharge detection device 5, so that the three-phase current and voltage balance degree of the capacitor is adjusted; the problem that the existing high-voltage capacitor cannot be detected and controlled is solved.
The high-voltage capacitor core part adopts a special structure that: the positive plate 7-1 and the negative plate 7-2 adopt high-conductivity non-inductive copper foils, an insulating medium between the positive plate and the negative plate adopts a high-polymer metalized polypropylene high-voltage-resistance insulating film 11, and a capacitor core is arranged between the positive plate and the negative plate of the capacitor to form a capacitor core monomer; the capacitor core single bodies connected in parallel form a capacitor core structure, and the negative electrode of the capacitor core in the upper capacitor core structure is connected with the positive electrode of the capacitor core in the lower capacitor core structure through a joint; the multilayer capacitor core structures are connected in series to form a capacitor core assembly 7; the insulation medium arranged on the capacitor core monomer on the capacitor core structure in the middle layer is provided with a layer of rated voltage insulation medium, and the number of the insulation medium layers arranged on the capacitor core monomer on the capacitor core structure in the first layer and the last layer is 2-3 times of the number of the insulation medium layers in the middle layer; multiple experiments prove that the capacitor breakdown firstly breaks down the first layer or the last layer; in one embodiment, after the number of the first layer and the last layer of the capacitor core insulating medium is increased by 2-3 times, the breakdown voltage of the capacitor can be increased by more than 2-3 times; each layer of capacitor core is in a parallel structure, and the parallel number of the capacitor cores is determined by the required capacitance and current; the upper layer and the lower layer adopt a series structure, and the number of series layers is determined by the required rated voltage. The capacitor can be oil-immersed or dry.
In the above embodiment, the fuse 2 may be used in addition to or independently of the capacitor positive electrode insulator, and may be used in other various electric appliances and power lines.
The intelligent controllable fuse comprises 3 parts: a positive insulator assembly 1, a controllable fuse assembly 2 and a fuse detection control device 3.
The positive electrode insulator assembly 1 includes: the device comprises a porcelain insulator subassembly, a porcelain insulator upper sealing piece 1-1-1, a lower sealing piece 1-1-2, an insulator upper screw 1-2-1, a lower screw 1-2-2, an upper fixing nut 1-2-3, a lower fixing nut 1-2-4, a detection device cover 1-3 and an insulator fixing seat 1-4;
the controllable fuse 2 comprises: the fuse protector comprises an upper fuse connector 2-1-1, a lower fuse connector 2-1-2, a fuse element 2-2, current limiting resistors 2-3-1 and 2-3-2 and high-voltage high-power JFET field effect transistors 2-4-1 and 2-4-2;
in the above embodiment, when the current and voltage values of the capacitor change, or overvoltage or overcurrent occurs, the DSP intelligent controller 6 controls and adjusts the current values of the JFET field effect transistors 2-4-1 and 2-4-2 of the fuse 2 and the voltage values at the two ends of the capacitor, adjusts the three-phase current and voltage balance of the capacitor, and adjusts and protects the high-voltage capacitor; the high voltage impact resistance and current impact resistance strength of the capacitor are improved; the capacitor provided by the embodiment has the advantages of small volume, good high-frequency characteristic, high efficiency, safety and reliability, and is suitable for high-speed rail vehicles, railways, metal smelting systems, national power grid harmonic and reactive power compensation and various power equipment consisting of the capacitor.
The technical solutions of the above embodiments are further described in detail with reference to the accompanying drawings.
In order to improve the controllability and the protectiveness of the capacitor and the breakdown resistance of the capacitor, the intelligent controllable fuse type high-voltage capacitor provided by the embodiment of the invention adopts a capacitor current adjustable and controllable mode, improves the high-voltage resistance and the current impact resistance which are 2-fold higher than the existing high-voltage capacitor technology, improves the high-voltage resistance and the current impact resistance of power system equipment formed by the capacitor, and improves the stability, the safety and the controllability of a power grid.
The embodiment of the invention solves the problems of uncontrollable, easy breakdown and easy short circuit of the existing capacitor, improves the high-voltage impact resistance and safety stability of the capacitor, is suitable for a power grid harmonic and reactive power compensation device, a high-voltage high-power variable-frequency speed regulation device and a high-capacity direct-current high-voltage power storage device, improves the high-voltage impact resistance of the capacitor and equipment, and improves the stability, safety and controllability of the power grid.
As shown in fig. 1 and 2, the input end of the fuse 2 is connected with the input end of the capacitor anode insulator 1, namely, the upper connecting piece 2-1-1 of the fuse is connected with the upper screw rod 1-2-1 of the insulator, and the output end of the fuse 2 is connected with the lower screw rod 1-2-2; the lower screw 1-2-2 is connected with the anode 7-3 of the high voltage-resistant capacitor core component.
The input end of the discharger 4 is connected with the capacitor anode insulator 1, the output end of the discharger 4 is connected with the capacitor cathode insulator, the input end of the discharge detection device 5 is connected with the discharger 4, the output end of the discharge detection device 5 is connected with the DSP intelligent controller 6, and detection data of the discharger 4 and voltage data at two ends of the capacitor are transmitted to the DSP intelligent controller 6 to be calculated and analyzed.
The positive electrode 7-3 of the capacitor core is connected with the positive electrode insulator 1 of the capacitor, and the negative electrode 7-4 of the capacitor core is connected with the negative electrode insulator of the capacitor;
fusing display 8 and discharge display 9 are connected DSP intelligent control ware 6, and when fuse 2 and discharger 4 normal work, fusing display 8 shows green with discharge display 9, shows red during the trouble, and condenser voltage and electric current are zero, and fusing display 8 extinguishes with discharge display 9.
As shown in FIG. 2, the positive electrode 7-3 of the capacitor core formed by the copper foil welding shaft on the positive plate 7-1 is of an inner lead type, and the negative electrode 7-4 of the capacitor core formed by the copper foil welding shaft on the negative plate 7-2 is of an outer lead type. The positive and negative plates are made of high-conductivity non-inductive copper foil, and a high-insulation medium of a high-voltage-resistance and strong-insulation high-polymer metallized polypropylene film 11 is arranged between the positive and negative plates. The capacitor core is vertically arranged between the positive electrode and the negative electrode of the capacitor in parallel, and the copper foil axial welding joint of the upper row of negative electrode plates is connected with the copper foil axial welding joint of the lower row of positive electrode plates; the middle capacitor cores, namely the 2 nd layer to the N-1 th layer capacitor cores adopt one-time layer of high insulation medium with rated voltage. 2-3 times of high-insulation media are adopted for the first layer 7-1-1, 7-1-2 and 7-1-3 of insulation media and the last layer 7-N-1, 7-N-2 and 7-N-3 of insulation media of the capacitor core, so that the high-voltage resistance and the current impact resistance of the capacitor are improved by more than 2-3 times;
each layer of capacitor core is in a parallel structure, and the parallel number is determined by the required capacitance; the upper layer and the lower layer adopt a series structure, and the number of the series layers is determined by the required rated voltage. In this embodiment, the capacitor case 12 may be oil-immersed or dry;
the positive electrode 7-3 of the capacitor core is an inner lead shaft type copper foil welding shaft, and the negative electrode 7-4 of the capacitor core is an outer lead shaft type plate copper foil welding shaft.
As shown in fig. 3 and 4, the insulator assembly 1 includes: the device comprises an insulating porcelain insulator, an upper sealing element 1-1-1, a lower sealing element 1-1-2, an upper screw 1-2-1, a lower screw 1-2-2, an upper fixing nut 1-2-3, a lower fixing nut 1-2-4, a detection device outer cover 1-3 and an insulator fixing seat 1-4;
the fuse main body includes: an upper connector 2-1-1, a lower connector 2-1-2, a fuse component;
the upper connecting piece 2-1-1 and the fuse component are of an integral structure; the upper screw 1-2-1 is screwed into the internal thread of the upper connecting piece 2-1-1 of the fuse and the pressing surface of the fuse component, and the contact area of the upper screw 1-2-1 and the fuse component 2 is increased; the screw rod of the lower connecting piece 2-1-2 of the fuse main body is screwed into the internal thread pressing surface on the upper part of the lower screw rod 1-2-2, so that the contact area of the fuse part and the lower screw rod 1-2-2 is increased, and the contact conductive current amount is increased.
As shown in figure 5, the input ends of the current limiting resistors 2-3-1 and 2-3-2 of the fuse part 2-2 are connected with the anode insulator screw rod through the upper connecting piece 2-1-1, the output ends of the current limiting resistors 2-3-1 and 2-3-2 are connected with the input ends of the high-voltage high-power JFET field effect tubes 2-4-1 and 2-4-2, the output ends of the JFET field effect tubes 2-4-1 and 2-4-2 are connected with the lower connecting piece 2-1-2 of the fuse main body, and the control electrodes 2-5-1 and 2-5-2 of the JFET field effect tubes are connected with the DSP intelligent controller 6 and are adjusted and controlled by the DSP intelligent controller 6.
As shown in fig. 6, the JFET field effect transistors 2-4-1 and 2-4-2 are N-channel type JFET field effect transistors, and 2-5-1 and 2-5-2 are JFET field effect transistor control electrodes; the figure is an N-channel type conductive channel, when a control voltage is applied to a control electrode P-type crystal, a resistance layer is generated, the higher the control voltage is, the wider the resistance layer is, and when the control voltage is higher than a certain value, the N-channel type conductive channel is completely blocked, so that the current of a JFET field effect transistor and a fuse is zero; the number of the current limiting resistors and the number of the JFET field effect transistor modules are determined by the current amount of the capacitor. The current limiting resistor has the functions of shunting and protecting the JFET field effect transistor module, and the JFET field effect transistor module has the function of controlling and adjusting the current of the fuse;
as shown in fig. 7, the positive and negative plates 7-1 and 7-2 of the capacitor core structure in the middle layer adopt high-conductivity non-inductive copper foils, the positive electrode 7-3 of the capacitor core formed by the copper foil welding shaft of the positive plate 7-1 is of an internal lead type, and the negative electrode 7-4 of the capacitor core formed by the copper foil welding shaft of the negative plate 7-2 is of an external lead type; the high-voltage-resistant insulating medium adopts a high-polymer metallized polypropylene high-voltage-resistant strong insulating film 11; the insulating medium arranged in the middle-layer capacitor core structure adopts 1 layer of high-voltage-rated and high-voltage-withstanding insulating medium;
as shown in fig. 8, 2-3 times of high-voltage-resistance insulating medium is adopted as the 1 st layer and the last layer of insulating medium; in the figure, a positive electrode 7-3 of a capacitor core formed by a copper foil shaft of a positive plate is of an internal lead type, a negative electrode 7-4 of the capacitor core formed by a copper foil shaft of a negative plate is of an external lead type, the positive plate and the negative plate adopt high-conductivity non-inductive copper foils, and an insulating medium layer adopts 2-3 layers of rated voltage high-polymer metalized polypropylene high-voltage-resistance strong insulating films 11-1 and 11-2.
The capacitor provided by the embodiment of the invention has good current and voltage controllability, strong high voltage resistance and shock resistance, stable operation performance, convenient assembly and maintenance, is suitable for various power systems such as national power grids, metal smelting, electric trains and railways, overcomes the defects and problems of uncontrollable and easy breakdown and the like in the prior capacitor technology, and has the following technical effects:
1. the problem of inconvenient detection of current high-voltage capacitor and control is thoroughly solved, improve condenser monitoring ability, improve electric wire netting operating stability and security.
2. When the capacitor has over-current or exceeds a specified range, the DSP intelligent controller controls the fuse to carry out current limiting or current regulation; when the three-phase current is in an unbalanced state, the fuse protector is controlled by the DSP intelligent controller to adjust the balance of the three-phase current. The voltage value of the capacitor can be controlled by changing the current value of the fuse, and the three-phase voltage balance degree of the capacitor is changed at the same time; when the power grid or the high-voltage capacitor is abnormal or fails, the DSP intelligent controller controls the fuse to disconnect the fuse, so that the capacitor is separated from the power grid, and the capacitor and the power grid are protected.
3. The positive and negative plates adopt high-conductivity non-inductive copper foils, so that the conductive flow rate is greatly improved, and the current impact resistance is improved.
4. The insulating medium adopts a high-molecular metallized polypropylene high-strength insulating film, so that the high-voltage resistance and the overvoltage and impact resistance are greatly improved.
5. The capacitor core structure of the middle layer adopts 1 layer of rated voltage insulating medium, the capacitor core structures of the first layer and the last layer adopt 2 times or 3 times of high-molecular metallized polypropylene high-voltage-resistant strong insulating film high-voltage-resistant insulating medium, and the capacity of improving high voltage resistance and current breakdown resistance is more than 2 times to 3 times of that of the prior capacitor technology.
6. The high-voltage capacitor has the advantages of high impact voltage resistance, large impact current resistance, good heat dissipation, small size, good high-frequency performance, high electricity storage efficiency, high voltage resistance, strong current impact resistance and capability of improving the stability and safety of the capacitor and power equipment. The method is suitable for various impact loads, high-frequency furnace loads of iron and steel smelting electric arc furnaces, metal electrolysis smelting systems, high-speed rail trains, national power grids and various electric power equipment, and has wide application prospect and social and economic benefits.
The capacitor provided by the embodiment of the invention thoroughly solves the problems of inconvenience in measurement and control and easiness in damage of the conventional high-voltage capacitor; the safety and the controllability of various power equipment consisting of the capacitor are improved; the invention has good monitoring and controlling performance, strong high pressure resistance and overcurrent impact resistance, small volume, good performance and long service life; the device is suitable for various power equipment such as high-speed rail vehicles, railways, metal smelting systems, national power grid harmonic and reactive power compensation and the like.
Example 2
As shown in fig. 5 and 6, which are block diagrams of an embodiment of a controllable fuse including a blowing control part and a fuse main body; the fusing control part includes: the fuse part 2-2, the current limiting resistor and the JFET field effect transistor module; wherein: the input end of the fuse element 2-2 is connected with power equipment or a power circuit, the output end of the fuse element 2-2 is connected with the input end of the current-limiting resistor, the output end of the current-limiting resistor is connected with the input end of the JFET field effect transistor module, the output end of the JFET field effect transistor module is connected with the power equipment or the power circuit, the control electrode of the JFET field effect transistor module is connected with an external controller, and the main body current of the fuse is adjusted through the control of the external controller on the JFET field effect transistor module.
The fuse body comprises a fuse component, an upper connecting piece 2-1-1 and a lower connecting piece 2-1-2; wherein: the upper end and the lower end of the fuse component form an integral structure with the upper connecting piece 2-1-1 and the lower connecting piece 2-1-2 respectively; the fusing control component is arranged in the fuse component, the input end of the fusing component 2-2 is connected with power equipment or a power line through an upper connecting piece 2-1-1, and the output end of the JFET field effect transistor module is connected with the power equipment or the power line through a lower connecting piece 2-1-2.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (6)
1. An intelligent controllable fuse type high voltage resistant capacitor, comprising: the device comprises a capacitor positive electrode insulator (1), a capacitor negative electrode insulator, a fuse (2), a fuse detection control device (3), a discharger (4), a discharge detection device (5), a DSP intelligent controller (6) and a high-voltage capacitor core component; wherein:
the capacitor positive insulator (1) is connected with the positive electrode of the high-voltage capacitor core part, the negative electrode of the high-voltage capacitor core part is connected with the capacitor negative electrode insulator, an internal discharge device (4) is arranged between the capacitor positive insulator (1) and the capacitor negative electrode insulator, the discharge detection device (5) is connected with the internal discharge device (4), and the discharge detection device (5) is connected with the DSP intelligent controller (6);
the fuse (2) is respectively connected with the capacitor anode insulator (1), the fuse detection control device (3) and the DSP intelligent controller (6), and the fuse detection control device (3) is connected with the DSP intelligent controller (6);
the method is characterized in that:
the fuse (2) includes a fuse control part and a fuse main body; the fusing control part includes: the fuse element (2-2), the current limiting resistor and the JFET field effect transistor module; wherein:
the input end of the fuse element (2-2) is connected with the capacitor anode insulator (1), the output end of the fuse element (2-2) is connected with the input end of a current-limiting resistor, the output end of the current-limiting resistor is connected with the input end of a JFET field effect transistor module, the output end of the JFET field effect transistor module is connected with the fuse main body, the control electrode of the JFET field effect transistor module is connected with a DSP intelligent controller (6), and the fuse main body current is adjusted through the control of the DSP intelligent controller (6) on the JFET field effect transistor module;
the fuse body comprises a fuse component, an upper connecting piece (2-1-1) and a lower connecting piece (2-1-2); the capacitor anode insulator (1) comprises an insulating porcelain insulator, an upper screw (1-2-1), a lower screw (1-2-2), an upper fixing nut (1-2-3), a lower fixing nut (1-2-4), an upper sealing element (1-1-1), a lower sealing element (1-1-2), an upper sealing gasket, a lower sealing gasket, a detection device outer cover (1-3) and an insulator fixing seat (1-4);
the fuse component is arranged in the insulating porcelain insulator, and the upper end and the lower end of the fuse component form an integral structure with the upper connecting piece (2-1-1) and the lower connecting piece (2-1-2) respectively; the upper screw (1-2-1) is screwed into the inner screw of the upper connecting piece (2-1-1), and the outer end part of the upper screw (1-2-1) is positioned outside the upper end of the porcelain insulator and is fixed and pressed by an upper fixing nut (1-2-3); the screw rod of the lower connecting piece (2-1-2) is screwed into the internal thread at the upper part of the lower screw rod (1-2-2), the outer end part of the lower screw rod (1-2-2) is positioned outside the lower end of the insulating porcelain bottle, and the insulator fixing seat (1-4) is installed on the outer end part of the lower screw rod (1-2-2) and is fixed and pressed tightly through a lower fixing nut (1-2-4); the detection device outer cover (1-3) is arranged between the insulator fixing seat (1-4) and the insulating porcelain insulator, and the fuse detection control device (3) is arranged in the detection device outer cover (1-3); an upper sealing element (1-1-1) is arranged between the upper end of the insulating porcelain bottle and the upper fixing screw cap (1-2-3), and an upper sealing gasket is arranged between the upper sealing element (1-1-1) and the upper fixing screw cap (1-2-3); a lower sealing element (1-1-2) is arranged between the insulator fixing seat (1-4) and the lower fixing nut (1-2-4), and a lower sealing gasket is arranged between the lower sealing element (1-1-2) and the lower fixing nut (1-2-4);
the fusing control component of the fuse (2) is arranged in the fuse component, the input end of the fusing component (2-2) is connected with the upper screw rod (1-2-1) through the upper connecting piece (2-1-1), and the output end of the JFET field effect transistor module is connected with the lower connecting piece (2-1-2);
the fuse detection control device (3) is arranged outside the capacitor anode insulator (1);
the high withstand voltage capacitor core member includes: the capacitor comprises a capacitor core, high-conductivity non-inductive copper foil and an insulating medium; wherein:
the high-conductivity non-inductive copper foil comprises a positive plate (7-1) and a negative plate (7-2), and an insulating medium is arranged between the positive plate (7-1) and the negative plate (7-2); the capacitor core is vertically arranged between a positive plate (7-1) and a negative plate (7-2) which are arranged in parallel to form a capacitor core single body; the positive plate (7-1) adopts an inner lead shaft type non-inductive copper foil welding shaft to form a capacitor core positive electrode (7-3) of a capacitor core monomer, and the negative plate (7-2) adopts an outer lead shaft type non-inductive copper foil welding shaft to form a capacitor core negative electrode (7-4) of the capacitor core monomer;
a plurality of capacitor core monomers connected in parallel form a layer of capacitor core structure, and a capacitor core cathode (7-4) in the upper layer of capacitor core structure is connected with a capacitor core anode (7-3) in the lower layer of capacitor core structure through a joint;
the capacitor core structures are connected in series to form a capacitor core assembly (7), the capacitor core monomer on each layer of the capacitor core structure is provided with at least one layer of rated insulating medium, and the number of insulating medium layers arranged on the capacitor core monomer on the middle layer of the capacitor core structure is less than that of insulating medium layers arranged on the capacitor core monomers on the first layer and the last layer of the capacitor core structure.
2. The intelligent controllable-fuse high-voltage capacitor of claim 1, wherein: any one or more of the following features are also included:
-the insulating medium is a high-molecular metallized polypropylene insulating film (11);
the number of capacitor core cells connected in parallel in each layer of capacitor core structure is determined by the required capacitance and current; the number of the capacitor core structure layers connected in series in the capacitor core assembly (7) is determined by the required rated voltage;
the multilayer capacitor core structure is an N-layer capacitor core structure, the insulating media set by the capacitor core monomers on the 1 st layer and the nth layer of the N-layer capacitor core structure are 2 times or 3 times layers, and the insulating media set by the capacitor core monomers on the 2 nd layer to the N-1 th layer of the N-layer capacitor core structure are 1 time layers, where N is a natural number.
3. The intelligent controllable fused high voltage capacitor of any one of claims 1 to 2, wherein: the device also comprises a fusing display (8) and a discharging display (9); wherein:
and the fusing display (8) and the discharging display (9) are respectively connected with the DSP intelligent controller (6).
4. The intelligent controllable-fuse high-voltage capacitor of claim 3, wherein: any one or more of the following features are also included:
when the capacitor or the fuse (2) breaks down, the DSP intelligent controller (6) controls the JFET field effect transistor module to be switched off, the capacitor is separated from the circuit, and the fusing display (8) sends an alarm signal;
when the capacitor fails or when the JFET field effect transistor module is out of control, the fuse current reaches a protection fuse value, the fuse element (2-2) is disconnected, the fuse detection control device (3) sends a signal to the DSP intelligent controller (6) to perform protection operation on a power grid and a circuit, and the fuse display (8) sends an alarm signal;
-when the capacitor voltage changes and exceeds a specified range, the DSP intelligent controller (6) controls the discharger (4) to release the capacitor voltage and the stored electricity quantity, and regulates and controls the voltage across the capacitor; when the capacitor is powered off, the DSP intelligent controller (6) controls the discharger (4) to discharge the capacitor, so that the voltage of the capacitor is reduced to be lower than a set voltage within a set time, and the discharge display (9) displays a working state;
when the three-phase current or voltage unbalance of the capacitor occurs, the DSP intelligent controller (6) controls the JFET field effect transistor module to adjust and control the three-phase charging current of the capacitor according to the three-phase current or voltage unbalance measurement and data of the capacitor detected by the fuse detection device (3) and the discharge detection device (5), so that the three-phase current or voltage balance is adjusted.
5. The intelligent controllable-fuse high-voltage capacitor of claim 4, wherein: the specified time is 5-10 minutes, and the set voltage is 30V.
6. The intelligent controllable-fuse high-voltage capacitor of claim 3, wherein: the high-voltage capacitor comprises a capacitor shell (12), wherein the discharger (4), the discharge detection device (5) and the high-voltage capacitor core part are respectively arranged in the capacitor shell (12);
the capacitor shell (12) is internally of an oil-immersed structure or a dry structure.
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| CN201811304181.1A CN109461584B (en) | 2018-11-03 | 2018-11-03 | Intelligent controllable fuse type high-voltage-resistant capacitor and controllable fuse |
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| CN111508795B (en) * | 2020-04-23 | 2022-07-22 | 南京萨特科技发展有限公司 | Adjustable fuse, fuse assembly and control method |
| CN111899977B (en) * | 2020-07-28 | 2021-11-26 | 兰州理工大学 | Capacitor capable of quickly cutting off power |
| CN112289655B (en) * | 2020-11-24 | 2022-08-30 | 平湖新诚电子股份有限公司 | Fuse protector |
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| WO2013091092A1 (en) * | 2011-12-19 | 2013-06-27 | Husky Injection Molding Systems Ltd. | System for disconnecting electrical power upon regulation failure |
| CN108615607B (en) * | 2018-04-04 | 2020-06-12 | 上海广吉电气有限公司 | Insulator fuse type high voltage-resistant capacitor |
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