CN219739633U - Unified power flow controller capable of short circuit current limiting - Google Patents
Unified power flow controller capable of short circuit current limiting Download PDFInfo
- Publication number
- CN219739633U CN219739633U CN202321096466.7U CN202321096466U CN219739633U CN 219739633 U CN219739633 U CN 219739633U CN 202321096466 U CN202321096466 U CN 202321096466U CN 219739633 U CN219739633 U CN 219739633U
- Authority
- CN
- China
- Prior art keywords
- power flow
- unified power
- short
- current limiting
- circuit current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000002131 composite material Substances 0.000 claims abstract description 19
- 239000012212 insulator Substances 0.000 claims abstract description 19
- 238000004146 energy storage Methods 0.000 claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims abstract description 9
- 230000005611 electricity Effects 0.000 claims description 2
- 230000017525 heat dissipation Effects 0.000 abstract 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a unified power flow controller capable of short-circuit current limiting, which relates to the technical field of unified power flow controllers and comprises a unified power flow control cabinet and a limiter component, wherein the left side inside the unified power flow control cabinet is divided into a control room, the limiter component for short-circuit current limiting is arranged at the bottom end inside the control room, the limiter component comprises a hollow composite insulator, a heat dissipation hole, an energy storage capacitor, a high-speed vortex driving switch, a deep current limiting reactor, a switching power supply and a controller and an isolator, the heat dissipation hole is formed in the top of the hollow composite insulator, and the energy storage capacitor is arranged at the left side inside the hollow composite insulator. The utility model provides a unified power flow controller capable of short-circuit current limiting, which is characterized in that an economic current limiter which is arranged at a bus-bar and is deeply used for limiting short-circuit current presents high impedance in response to overcurrent, and can effectively inhibit the confluence of another bus bar, so that the short-circuit current level is lower than the breaking capacity of an outgoing line breaker, and the reliable power supply of a normal line is ensured.
Description
Technical Field
The utility model relates to the technical field of unified power flow controllers, in particular to a unified power flow controller capable of short circuit current limiting.
Background
The Unified Power Flow Controller (UPFC) is used as a flexible alternating current transmission device with the strongest function at present, and provides a new technical means for solving the problems that the power flow distribution of a power grid is uneven, the power supply capacity is difficult to improve and the like which are difficult to solve by the traditional technology.
However, as the maximum shielding current of the high-voltage circuit breaker is 50kA in UPFC engineering, when a 500kV line containing UPFC is in metallic grounding short circuit, if the short circuit position is close to a series transformer, the short circuit current is likely to break through the maximum shielding capacity of the circuit breaker, so that the circuit breaker cannot work normally, and as is well known, when a power system is in short circuit fault, the short circuit current is generally ten times of rated current, which causes great harm to electrical equipment such as a transformer, a generator, the circuit breaker, a power transmission line and the like.
Throughout this comparison, the applicant found that the following problems exist: the opening and closing of the electric ball valve are automatically controlled, and the problem that the valve switch cannot be controlled easily occurs when faults or power failure occur, so that the electric ball valve needs to be further improved.
In view of the above, research and improvement have been made to solve the existing drawbacks of the conventional structure, and a unified power flow controller capable of short-circuit current limiting has been proposed.
Disclosure of Invention
The utility model aims to provide a unified power flow controller capable of short-circuit current limiting so as to solve the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions: including unified power flow control cabinet and limiter subassembly, the inside left side of unified power flow control cabinet is divided into the control room for short circuit current limiting the inside bottom of control room is located to the limiter subassembly, the limiter subassembly includes hollow composite insulator, louvre, energy storage electric capacity, high-speed vortex drive switch, degree of depth current limiting reactor, switching power supply and control and isolator, the louvre has been seted up at hollow composite insulator top, and hollow composite insulator inside left side is equipped with energy storage electric capacity to energy storage electric capacity right side electricity has linked high-speed vortex drive switch, hollow composite insulator external has degree of depth current limiting reactor, and hollow composite insulator bottom has linked firmly the isolator.
As the preferable technical scheme, the right side inside the unified power flow control cabinet is divided into an electrical room, and a cable is connected to the outside of the electrical room.
As the preferable technical scheme, the outside fixedly connected with current collector subassembly of unified power flow control cabinet, current collector subassembly includes bottom plate and floor, the bottom plate passes through the bolt fastening and is in the unified power flow control cabinet outside, and bottom plate top fixed mounting has the floor.
As the preferable technical scheme, the current collector assembly further comprises a lower half-ring magnetic core and a screw rod, the lower half-ring magnetic core is fixedly arranged at the top of the rib plate, and the screw rod is rotatably arranged at the opening of the right side of the lower half-ring magnetic core.
As the preferable technical scheme, the current collector assembly further comprises a screw cap, the screw cap is connected to the top of the screw rod in a threaded manner, and the screw cap is located above the opening on the right side of the lower half-ring magnetic core.
As the preferable technical scheme, the current collector assembly further comprises a hinge and an upper half-ring magnetic core, the hinge is fixedly arranged on the left side of the lower half-ring magnetic core, and the upper half-ring magnetic core is rotatably arranged at the top of the hinge.
As the preferred technical scheme, the current collector assembly further comprises a slot and a Hall element, the slot matched with the screw rod is arranged at the opening at the right side of the upper half-ring magnetic core, and the Hall element is arranged at the opening at the right side of the upper half-ring magnetic core opposite to the lower half-ring magnetic core.
Compared with the prior art, the utility model has the following beneficial effects:
1. when the electric power system is in normal operation, the high-speed vortex driving switch is in a closing state, the high-speed vortex driving switch is used as a simple flow guiding device, a zero-loss state is externally displayed, when the electric power system has a short-circuit fault, the current collector component rapidly transmits short-circuit current information to the switching power supply and control, the switching power supply and control accurately and rapidly judge the zero-crossing moment of three-phase current through a proper algorithm and respectively send out an action signal to the high-speed vortex driving switch before the zero-crossing moment of each phase of current, a deep current limiting reactor is put into a fault loop, an economic current limiter which is arranged at a bus-bar and is used for limiting short-circuit current deeply presents high impedance in response to overcurrent, the confluence of the other bus can be effectively restrained, the short-circuit current level is lower than the breaking capacity of an outgoing line breaker, and reliable power supply of a normal line is ensured;
2. the utility model adopts the principle of a conventional open-loop Hall current sensor: when primary current flows through a long cable, a magnetic field is generated around the cable, the magnitude of the magnetic field is in direct proportion to the current flowing through the cable, the generated magnetic field is gathered in a magnetic core formed by an upper semi-ring magnetic core and a lower semi-ring magnetic core, measurement is carried out through a Hall element positioned in an air gap of the annular magnetic core, and the output voltage accurately reflects the primary current and is fed back to a limiter assembly for short-circuit current limiting of the unified power flow controller.
Drawings
FIG. 1 is a schematic view of the overall external structure of the present utility model;
FIG. 2 is a schematic view of the exterior configuration of the restrictor assembly of the present utility model;
FIG. 3 is a schematic diagram of the front view of the current collector assembly of the present utility model;
fig. 4 is a schematic side view of a current collector assembly according to the present utility model.
Reference numerals in the drawings: 1. a tide control cabinet; 2. a control room; 3. an electric chamber; 4. a cable;
5. a restrictor assembly; 501. a hollow composite insulator; 502. a heat radiation hole; 503. an energy storage capacitor; 504. a high-speed eddy current drive switch; 505. a deep current limiting reactor; 506. a switching power supply and control; 507. an isolator;
6. a current collector assembly; 601. a bottom plate; 602. rib plates; 603. a lower half-ring magnetic core; 604. a screw; 605. a screw cap; 606. a hinge; 607. an upper half-ring magnetic core; 608. a slot; 609. a Hall element.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Examples: as shown in fig. 1 to 2, the present utility model provides a unified power flow controller capable of short-circuit current limiting, which comprises a unified power flow control cabinet 1 and a limiter assembly 5, wherein the left side inside the unified power flow control cabinet 1 is divided into a control room 2, the right side inside the unified power flow control cabinet 1 is divided into an electric room 3, the electric room 3 is externally connected with a cable 4, the limiter assembly 5 for short-circuit current limiting is arranged at the bottom end inside the control room 2, the limiter assembly 5 comprises a hollow composite insulator 501, a radiating hole 502, an energy storage capacitor 503, a high-speed eddy current driving switch 504, a deep current limiting reactor 505, a switching power supply, a control 506 and an isolator 507, the radiating hole 502 is formed at the top of the hollow composite insulator 501, the energy storage capacitor 503 is arranged at the left side inside the hollow composite insulator 501, the right side of the energy storage capacitor 503 is electrically connected with a high-speed eddy current driving switch 504, the hollow composite insulator 501 is externally connected with a deep current limiting reactor 505, and the isolator 507 is fixedly connected at the bottom of the hollow composite insulator 501;
in this embodiment, when the power system is in normal operation, the high-speed eddy current driving switch 504 is in a closed state, the high-speed eddy current driving switch 504 is used as a simple current guiding device, a zero-loss state is presented to the outside, when the power system has a short-circuit fault, the current collector assembly 6 rapidly transmits short-circuit current information to the switching power supply and the control 506, the switching power supply and the control 506 accurately and rapidly judge the zero-crossing time of the three-phase current through a suitable algorithm, and respectively send out an action signal to the high-speed eddy current driving switch 504 before the zero-crossing time of each phase current, so that the deep current limiting reactor 505 is put into the fault loop.
Examples: as shown in fig. 3 and fig. 4, the unified power flow control cabinet 1 is fixedly connected with a current collector assembly 6 outside, the current collector assembly 6 comprises a bottom plate 601 and a rib plate 602, the bottom plate 601 is fixed outside the unified power flow control cabinet 1 through bolts, the top of the bottom plate 601 is fixedly provided with the rib plate 602, the current collector assembly 6 further comprises a lower half-ring magnetic core 603 and a screw rod 604, the top of the rib plate 602 is fixedly provided with the lower half-ring magnetic core 603, the opening at the right side of the lower half-ring magnetic core 603 is rotatably provided with the screw rod 604, the current collector assembly 6 further comprises a nut 605, the top of the screw rod 604 is in threaded connection with the nut 605, the nut 605 is positioned above the opening at the right side of the lower half-ring magnetic core 603, the current collector assembly 6 further comprises a hinge 606 and an upper half-ring magnetic core 607, the left side of the lower half-ring magnetic core 603 is fixedly provided with the hinge 606, the top of the hinge 606 is rotatably provided with the upper half-ring magnetic core 607, the current collector assembly 6 further comprises a slot 608 and a hall element 609, the opening at the right side of the upper half-ring magnetic core 607 is provided with the slot 608 matched with the screw rod 604, and the hall element 609 is arranged at the opening at the opposite opening of the upper half side of the upper half-ring magnetic core 603;
in this embodiment, when the primary current flows through a long cable 4, a magnetic field is generated around the cable 4, the magnitude of the magnetic field is proportional to the current flowing through the cable 4, the generated magnetic field is collected in the core formed by the upper half-ring core 607 and the lower half-ring core 603, and the output voltage is measured and amplified by the hall element 609 located in the air gap of the annular core, and is fed back to the limiter assembly 5 for short-circuit current limiting of the unified power flow controller.
The working principle of the utility model is as follows: when the unified power flow controller capable of short-circuit current limiting is used, when primary current flows through a long cable 4, a magnetic field is generated around the cable 4, the magnitude of the magnetic field is proportional to the current flowing through the cable 4, the generated magnetic field is gathered in a magnetic core formed by an upper semi-ring magnetic core 607 and a lower semi-ring magnetic core 603, the magnetic field is measured and amplified by a Hall element 609 positioned in an air gap of the annular magnetic core, the output voltage accurately reflects the primary current and is fed back to a limiter assembly 5, the short-circuit current limiting is used for the unified power flow controller, when the power system is in normal operation, the high-speed eddy current driving switch 504 is in a closing state, the high-speed eddy current driving switch 504 is used as a simple flow guiding device, when a short-circuit fault occurs in the power system, the current collector component 6 rapidly transmits short-circuit current information to the switching power supply and the control 506, the switching power supply and the control 506 accurately and rapidly judge the zero-crossing time of the three-phase current through a proper algorithm and respectively send out action signals to the high-speed eddy current driving switch 504 before the zero-crossing time of each phase of current, the deep current limiting reactor 505 is put into a fault loop, the economic current limiter for deeply limiting short-circuit current arranged at the bus joint responds to overcurrent and presents high impedance, the bus of the other bus can be effectively restrained, the short-circuit current level is lower than the switching-off capability of the outgoing circuit breaker, and the reliable power supply of a normal line is ensured.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (7)
1. The utility model provides a unified power flow controller that can short circuit current limiting, its characterized in that, includes unified power flow control cabinet (1) and limiter subassembly (5), unified power flow control cabinet (1) inside left side is divided into control room (2), is used for short circuit current limiting limiter subassembly (5) are located control room (2) inside bottom, limiter subassembly (5) are including hollow composite insulator (501), louvre (502), energy storage capacitor (503), high-speed vortex driving switch (504), degree of depth current limiting reactor (505), switching power supply and control (506) and isolator (507), louvre (502) have been seted up at hollow composite insulator (501) top, and hollow composite insulator (501) inside left side is equipped with energy storage capacitor (503) to energy storage capacitor (503) right side electricity is connected with high-speed vortex driving switch (504), hollow composite insulator (501) external has degree of depth current limiting reactor (505), and hollow composite insulator (501) bottom has linked firmly isolator (507).
2. The unified power flow controller capable of short-circuit current limiting according to claim 1, wherein the right side inside the unified power flow control cabinet (1) is divided into an electrical room (3), and the electrical room (3) is externally connected with a cable (4).
3. The unified power flow controller capable of short-circuit current limiting according to claim 1, wherein a current collector assembly (6) is fixedly connected to the outside of the unified power flow control cabinet (1), the current collector assembly (6) comprises a bottom plate (601) and rib plates (602), the bottom plate (601) is fixedly arranged on the outside of the unified power flow control cabinet (1) through bolts, and the rib plates (602) are fixedly arranged on the top of the bottom plate (601).
4. A unified power flow controller capable of short-circuit current limiting according to claim 3, characterized in that the current collector assembly (6) further comprises a lower half-ring magnetic core (603) and a screw (604), the lower half-ring magnetic core (603) is fixedly mounted on the top of the rib plate (602), and the screw (604) is rotatably mounted at the opening on the right side of the lower half-ring magnetic core (603).
5. The unified power flow controller capable of short-circuit current limiting according to claim 4, wherein the current collector assembly (6) further comprises a nut (605), the nut (605) is screwed on the top of the screw (604), and the nut (605) is located above the opening on the right side of the lower half-ring magnetic core (603).
6. The unified power flow controller capable of short-circuit current limiting according to claim 4, wherein the current collector assembly (6) further comprises a hinge (606) and an upper half-ring magnetic core (607), the hinge (606) is fixedly installed on the left side of the lower half-ring magnetic core (603), and the upper half-ring magnetic core (607) is rotatably installed on the top of the hinge (606).
7. The unified power flow controller capable of short-circuit current limiting according to claim 6, wherein the current collector assembly (6) further comprises a slot (608) and a hall element (609), the slot (608) matched with the screw (604) is formed at the opening at the right side of the upper half-ring magnetic core (607), and the hall element (609) is arranged at the opening at the right side of the upper half-ring magnetic core (607) opposite to the lower half-ring magnetic core (603).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321096466.7U CN219739633U (en) | 2023-05-09 | 2023-05-09 | Unified power flow controller capable of short circuit current limiting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321096466.7U CN219739633U (en) | 2023-05-09 | 2023-05-09 | Unified power flow controller capable of short circuit current limiting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219739633U true CN219739633U (en) | 2023-09-22 |
Family
ID=88026566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321096466.7U Active CN219739633U (en) | 2023-05-09 | 2023-05-09 | Unified power flow controller capable of short circuit current limiting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219739633U (en) |
-
2023
- 2023-05-09 CN CN202321096466.7U patent/CN219739633U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201608534U (en) | Microprocessor control voltage-regulating type reactive automatic compensating device of electrified railway | |
| CN219739633U (en) | Unified power flow controller capable of short circuit current limiting | |
| CN207116342U (en) | A kind of arc-fault circuit interrupter | |
| CN105280430A (en) | 10kV solar intelligent pole-mounted vacuum circuit breaker | |
| CN205159193U (en) | Vacuum circuit breaker on 10kV solar energy intelligence post | |
| CN208751732U (en) | A kind of system for monitoring temperature of high voltage equipment | |
| CN217956708U (en) | Photovoltaic grid-connected access system | |
| CN216117757U (en) | Ammeter case device that can monitor overvoltage | |
| CN212182851U (en) | Metering cabinet | |
| CN209748207U (en) | Low-voltage grid-connected switch | |
| CN203166460U (en) | Fault current limiter | |
| CN2295288Y (en) | Reactive power automatic compensating box for civil buildings | |
| CN201774699U (en) | Magnetic control arc furnace transformer device | |
| CN219611330U (en) | Three-phase integrated cabinet type fault current limiter | |
| CN219106892U (en) | High-protection high-low voltage preassembled transformer substation | |
| CN219760331U (en) | Three-phase overvoltage protection device of arc extinction cabinet | |
| CN205159830U (en) | Novel JP cabinet | |
| CN216794597U (en) | High-voltage power supply relay protection system of tower crane | |
| CN216530519U (en) | Water immersion electric shock prevention and power utilization protector capable of achieving reactive compensation | |
| CN216162469U (en) | Based on GIL pipeline outer wall circulation electricity-taking device | |
| CN216792304U (en) | Automatic power switching device for intelligent high-voltage cable grounding box | |
| CN212231100U (en) | Distribution network voltage regulator | |
| CN213959499U (en) | Safety device of high-voltage switch cabinet | |
| Li et al. | Checking and Preventing Measures of Short-Circuit Current Breaking Level of 220kV Circuit Breaker | |
| CN218161781U (en) | Accurate phase control switching-on device for inhibiting switching-on inrush current of transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |