CN214798875U - Arc suppression coil automatic tracking compensation integrated equipment - Google Patents
Arc suppression coil automatic tracking compensation integrated equipment Download PDFInfo
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- CN214798875U CN214798875U CN202121401670.6U CN202121401670U CN214798875U CN 214798875 U CN214798875 U CN 214798875U CN 202121401670 U CN202121401670 U CN 202121401670U CN 214798875 U CN214798875 U CN 214798875U
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Abstract
The utility model discloses an arc suppression coil automatic tracking compensation complete device, which comprises a grounding transformer, a turn-adjusting arc suppression coil, a load switch for gear adjustment, a microcomputer controller and a damping resistance box; the grounding transformer is connected into the power system under the action of a neutral point, and the arc suppression coil is electrically connected with the grounding transformer; a tap of the arc suppression coil is fixed on a tap of the on-load switch, and a grounding loop of the arc suppression coil is connected into the damping resistance box; the microcomputer controller calculates the system grounding capacity flow by collecting the system voltage and current, and controls the on-load switch to adjust to a proper gear to eliminate the system grounding capacity flow. The utility model adopts the above structure arc suppression coil automatic tracking compensation integrated equipment, the operation is reliable and stable, and it is convenient to adjust, can adjust comprehensively automatically.
Description
Technical Field
The utility model belongs to the technical field of the power equipment technique and specifically relates to an arc suppression coil automatic tracking compensation integrated equipment is related to.
Background
For electric power systems with different voltage grades, grounding modes of neutral points are different, and a low-current grounding operation mode is mainly adopted in a 6-66 KV power distribution system in China. In order to effectively prevent arc grounding of a system, eliminate grounding faults and improve power supply quality, arc suppression coil devices are installed when the capacitance current of a power grid exceeds 10A according to the new regulations of national over-voltage protection design specifications. The prior manual turn-adjusting arc suppression coil is commonly adopted in the power grid in China, and the main defects of the manual turn-adjusting arc suppression coil are shown in the following two aspects because the capacitance current of the power grid cannot be monitored in real time: (1) the adjustment is inconvenient, and the adjustment can be carried out only by withdrawing the device from operation; (2) and the judgment is difficult, and the running state of the system cannot be accurately judged, so that the detuning degree and the neutral point displacement voltage are difficult to ensure to meet the requirements.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an arc suppression coil automatic tracking compensation integrated equipment solves the arc suppression coil and transfers the inconvenient and unsafe problem of regulation of circle.
In order to achieve the above purpose, the utility model provides a following technical scheme:
an arc suppression coil automatic tracking compensation complete device comprises a grounding transformer, a turn adjusting type arc suppression coil, a gear adjusting on-load switch, a microcomputer controller and a damping resistor box; the grounding transformer is connected into the power system under the action of a neutral point, and the arc suppression coil is electrically connected with the grounding transformer; a tap of the arc suppression coil is fixed on a tap of the on-load switch, and a grounding loop of the arc suppression coil is connected into the damping resistance box; the microcomputer controller calculates the system grounding capacity flow by collecting the system voltage and current, and controls the on-load switch to adjust to a proper gear to eliminate the system grounding capacity flow.
Preferably, the grounding transformer is a transformer with Z-shaped wiring.
Preferably, the damping resistance box is connected to a ground circuit of the arc suppression coil in a series connection mode or a secondary side parallel connection mode.
Preferably, the microcomputer controller comprises a man-machine conversation module, an alarm module, a memory module, a remote transmission module, an online operation module, an identification module, an automatic locking module, a fault inquiry module, a tuning module, a wave recording module, a line selection module and a tripping module.
The utility model adopts the above structure arc suppression coil automatic tracking compensation integrated equipment, the operation is reliable and stable, convenient operation, interference killing feature are strong, have overcome the little defect of each arc suppression coil device control range in the past, can realize automatic comprehensive regulation.
Drawings
FIG. 1 is a block diagram of an embodiment of the present invention;
fig. 2 is a diagram of a series-type system according to an embodiment of the present invention;
fig. 3 is a structural diagram of a parallel system according to an embodiment of the present invention.
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings and examples.
The complete set of automatic tracking compensation device for the arc suppression coil comprises a grounding transformer, a turn adjusting type arc suppression coil, a gear adjusting on-load switch, a microcomputer controller and a damping resistor box. The grounding transformer is connected into a power system under the action of a neutral point, and the arc suppression coil is electrically connected with the grounding transformer. The tap of the arc suppression coil is fixed on the tap of the on-load switch, and the grounding loop of the arc suppression coil is connected to the damping resistance box. The microcomputer controller calculates the system grounding capacity flow by collecting the system voltage and current, and controls the on-load switch to adjust to a proper gear to eliminate the system grounding capacity flow.
The grounding transformer adopts a transformer with Z-shaped wiring, zero sequence impedance is very low, no-load loss is very small, and the capacity of the transformer can be utilized by 100%.
The damping resistance box is connected to a grounding loop of the arc suppression coil in a series connection mode or a secondary side parallel connection mode. In the automatic tracking arc suppression coil, the adjustment precision is high, the residual current is small, the automatic tracking arc suppression coil is operated close to a resonance point, and in order to prevent the generation of series resonance overvoltage, a method of increasing a damping resistor is adopted in a grounding loop of the arc suppression coil to suppress the generation of the wiping overvoltage so as to ensure that the displacement voltage of a neutral point (a grounding transformer in the embodiment) does not exceed 15% of phase voltage during the normal operation of a system. The damping resistor is a stainless steel alloy resistor with high temperature resistance and excellent performance, and when the system has a single-phase earth fault, the system is in short circuit with the damping resistor so as to avoid burning the damping resistor; when the system returns to normal, the short contact point of the damping resistor is disconnected, so that the damping resistor is normally connected in series in the arc suppression coil loop.
The microcomputer controller comprises a man-machine conversation module, an alarm module, a memory module, a remote transmission module, an online operation module, an identification module, an automatic locking module, a fault query module, a tuning module, a wave recording module, a line selection module and a trip module.
Specifically, the man-machine conversation module can realize the switching function of an automatic/manual control mode, the setting function of time parameters, operation parameters and control parameters, the fault information inquiry function and the like.
The alarm module can send out alarm signals when single-phase earth faults and other faults occur.
The memory module has the function of keeping stored information when the power is off, and the large-capacity storage electronic hard disk can permanently record historical data of action information, grounding information and fault information of the controller, so that the set parameters of the controller after the working power supply or the injection power supply is powered off can not be lost.
The remote transmission module is provided with remote interfaces RS232 and RS485, various baud rates can be selected, and various communication protocols such as MODBUS, CDT, IEC61850 and the like can be conveniently connected with a microcomputer monitoring system of the substation.
The online operation module automatically identifies the operation mode of the system and realizes the parallel operation of two or more devices.
The identification module can automatically identify and automatically convert the operation mode of the user power supply system, namely, when the user system runs in parallel or in a split mode, the device can change the change of the control mode of the arc suppression coil according to the change of the operation state so as to achieve the most reasonable operation state, automatically identify the permanent ground fault and the instantaneous ground fault in the system, and quickly start and quit the compensation of the arc suppression coil.
When the system has single-phase earth fault, the automatic locking module automatically locks the regulation and control system to ensure stable compensation of the arc suppression coil.
The fault query module can conveniently query the self-set parameters of the equipment and various kinds of record information stored when the system has single-phase earth fault.
The automatic tuning and the manual tuning of the tuning module are independent and can be switched. And under the normal condition of the power grid, automatically measuring and tracking the capacitance current of the compensation system.
The wave recording module can collect and record waves of voltage and current when a ground fault occurs, can directly display waveforms on pictures, and is convenient for field on-site analysis. Meanwhile, the wave recording file can be directly led out by a USB port arranged in front of the controller through a USB disk, so that the data is convenient to carry and store.
The grounding line selection module realizes quick and accurate line selection according to the existing line selection method.
The tripping module can rapidly trip the fault line according to the user requirement according to the ground fault line selected by judgment, cut the fault line and perform different tripping delay settings on different outlet lines in the system according to the system operation requirement.
The working principle is as follows: the turn-adjusting arc suppression coil is provided with a plurality of taps, and the taps of the arc suppression coil are adjusted by adopting a load switch so as to change the inductance value. When the power grid normally operates, the microcomputer controller calculates the capacitance current to ground in the current mode of the power grid by measuring the amplitude and phase change of the current flowing through the arc suppression coil in real time, and adjusts the on-load switch tap joint to a required compensation gear by the microcomputer controller according to the preset minimum residual current value or the detuning degree. After a ground fault occurs, the residual current at the fault point may be limited within a set range. The normal operation adopts an overcompensation mode, and an arc suppression coil grounding loop adopts a mode of grounding through a series connection damping resistor or adopting a direct tail end grounding secondary parallel resistance.
The grounding line selection module configured by the device selects a grounding line during grounding fault by adopting an active power method, namely, the active power of each line and the inductive reactance active power of the arc suppression coil are acquired when the grounding fault occurs, and the line with the maximum active power value acquired is a fault line.
To sum up, the utility model adopts the above structure arc suppression coil automatic tracking compensation integrated equipment, the operation is reliable and stable, convenient operation, interference killing feature are strong, has overcome the little defect of each arc suppression coil device control range in the past, can realize automatic comprehensive regulation.
The above are specific embodiments of the present invention, but the scope of protection of the present invention should not be limited thereto. Any changes or substitutions which can be easily conceived by those skilled in the art within the technical scope of the present invention are covered by the protection scope of the present invention, and therefore, the protection scope of the present invention is subject to the protection scope defined by the claims.
Claims (4)
1. The utility model provides an arc suppression coil automatic tracking compensation integrated equipment which characterized in that: the device comprises a grounding transformer, a turn-adjusting arc suppression coil, a gear adjustment on-load switch, a microcomputer controller and a damping resistance box; the grounding transformer is connected into the power system under the action of a neutral point, and the arc suppression coil is electrically connected with the grounding transformer; a tap of the arc suppression coil is fixed on a tap of the on-load switch, and a grounding loop of the arc suppression coil is connected into the damping resistance box; the microcomputer controller calculates the system grounding capacity flow by collecting the system voltage and current, and controls the on-load switch to adjust to a proper gear to eliminate the system grounding capacity flow.
2. The arc suppression coil automatic tracking compensation complete device according to claim 1, characterized in that: the grounding transformer adopts a transformer with Z-shaped wiring.
3. The arc suppression coil automatic tracking compensation complete device according to claim 1, characterized in that: and the damping resistance box is connected to a grounding loop of the arc suppression coil in a serial connection mode or a secondary side parallel connection mode.
4. The arc suppression coil automatic tracking compensation complete device according to claim 1, characterized in that: the microcomputer controller comprises a man-machine conversation module, an alarm module, a memory module, a remote transmission module, an online operation module, an identification module, an automatic locking module, a fault query module, a tuning module, a wave recording module, a line selection module and a tripping module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121401670.6U CN214798875U (en) | 2021-06-23 | 2021-06-23 | Arc suppression coil automatic tracking compensation integrated equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121401670.6U CN214798875U (en) | 2021-06-23 | 2021-06-23 | Arc suppression coil automatic tracking compensation integrated equipment |
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| CN214798875U true CN214798875U (en) | 2021-11-19 |
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| CN202121401670.6U Active CN214798875U (en) | 2021-06-23 | 2021-06-23 | Arc suppression coil automatic tracking compensation integrated equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114268085A (en) * | 2021-12-06 | 2022-04-01 | 国网四川省电力公司电力科学研究院 | Power distribution network single-phase earth fault arc extinction method based on capacitance bisection switching |
| CN114487969A (en) * | 2022-02-09 | 2022-05-13 | 广东韶钢松山股份有限公司 | Live debugging method and device for composite grounding system |
-
2021
- 2021-06-23 CN CN202121401670.6U patent/CN214798875U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114268085A (en) * | 2021-12-06 | 2022-04-01 | 国网四川省电力公司电力科学研究院 | Power distribution network single-phase earth fault arc extinction method based on capacitance bisection switching |
| CN114268085B (en) * | 2021-12-06 | 2023-09-26 | 国网四川省电力公司电力科学研究院 | Single-phase earth fault arc extinction method for power distribution network based on capacitive dichotomy switching |
| CN114487969A (en) * | 2022-02-09 | 2022-05-13 | 广东韶钢松山股份有限公司 | Live debugging method and device for composite grounding system |
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