CN210608516U - Transformer core multipoint earthing's fault handling circuit - Google Patents
Transformer core multipoint earthing's fault handling circuit Download PDFInfo
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- CN210608516U CN210608516U CN201921688814.3U CN201921688814U CN210608516U CN 210608516 U CN210608516 U CN 210608516U CN 201921688814 U CN201921688814 U CN 201921688814U CN 210608516 U CN210608516 U CN 210608516U
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Abstract
The utility model discloses a fault processing circuit of transformer iron core multipoint earthing, which comprises a transformer, a capacitor connected with the transformer in parallel and a capacitor charging circuit; the capacitor charging loop comprises a direct current power supply, a charging resistor and a first switch, wherein the positive electrode of the direct current power supply is connected with the first end of the capacitor through the charging resistor and the first switch which are connected in series, and the negative electrode of the direct current power supply is connected with the second end of the capacitor; the transformer comprises a transformer iron core and a transformer shell, and the transformer iron core is grounded through the transformer shell; the first end of the capacitor is connected with the transformer iron core through the second switch, and the second end of the capacitor is connected with the transformer shell. The embodiment of the utility model provides an in, fault handling circuit adopts electric capacity impact method to handle transformer core multiple spot ground connection's trouble, has simple high efficiency, labour saving and time saving's advantage, and has reduced the power off time, has fine practicality.
Description
Technical Field
The utility model relates to a transformer technical field particularly, relates to a transformer core multiple spot ground connection's fault handling circuit.
Background
The multipoint grounding of the transformer iron core is one of common faults of the transformer, and the searching and processing have certain difficulty, and the conventional methods are a large-current method (an electric welding machine) and a hanging cover processing method; the method adopts a high-current method (electric welding machine), the grounding point can not be fused frequently due to low voltage, the purpose of removing faults can not be achieved frequently, and the problems of large workload, high cost and long power failure time exist; by adopting the cover hanging processing method, the transformer cover hanging is a great action, a large amount of manpower and material resources are consumed, and the problems of time consumption, high cost and long power failure time exist.
It can be seen that the conventional method has the problems of large workload, high cost, long power failure time and the like, and therefore a practical and efficient fault handling method is urgently needed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, the utility model provides a transformer core multiple spot ground's fault handling circuit adopts fault handling circuit handles transformer core multiple spot ground's trouble, has simple efficient advantage, has fine practicality.
Correspondingly, the embodiment of the utility model provides a transformer core multiple spot ground connection's fault handling circuit, fault handling circuit includes the transformer, with the condenser and the condenser charge circuit of transformer parallel connection;
the capacitor charging loop comprises a direct current power supply, a charging resistor and a first switch, wherein the positive electrode of the direct current power supply is connected with the first end of the capacitor through the charging resistor and the first switch which are connected in series, and the negative electrode of the direct current power supply is connected with the second end of the capacitor;
the transformer comprises a transformer iron core and a transformer shell, and the transformer iron core is grounded through the transformer shell; the first end of the capacitor is connected with the transformer iron core through a second switch, and the second end of the capacitor is connected with the transformer shell.
In an optional embodiment, the fault handling circuit further comprises a resistor divider connected in parallel with the capacitor, the resistor divider comprising a first divider resistor and a second divider resistor connected in series.
In an optional embodiment, the fault handling circuit further comprises a capacitor discharge circuit connected in parallel with the capacitor, and the capacitor discharge circuit comprises a third switch and a discharge resistor connected in series.
In an optional implementation manner, the dc power supply is an adjustable dc power supply, and an output voltage of the adjustable dc power supply is adjusted in a range from 0kV to 6 kV.
The embodiment of the utility model provides a fault treatment circuit of transformer core multiple spot ground connection, fault treatment circuit adopts the electric capacity impact method to handle transformer core multiple spot ground connection's trouble, has simple high efficiency, labour saving and time saving's advantage, and has reduced the power off time, has fine practicality.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a fault handling circuit according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Fig. 1 is a schematic diagram of a fault handling circuit according to an embodiment of the present invention.
The embodiment of the utility model provides a transformer core multiple spot ground connection's fault handling circuit, fault handling circuit includes transformer 1, with transformer 1 parallelly connected condenser C and condenser charge circuit.
The capacitor C is charged by the capacitor charging circuit, and the implementation of the capacitor charging circuit can be various as long as the equivalent function and effect can be achieved. In the embodiment of the present invention, the capacitor charging circuit includes DC power supply DC, charging resistor R0 and first switch K1, DC power supply DC positive pole through the charging resistor R0 and first switch K1 that concatenate with condenser C's first end is connected, DC power supply DC negative pole with condenser C's second end is connected, through first switch K1 control condenser C's charging process.
Preferably, the DC power supply DC is an adjustable DC power supply, the output voltage of the adjustable DC power supply is adjusted to be 0kV to 6kV, and the impact on the normal position of the transformer 1 is minimized by using the adjustable DC power supply, thereby effectively protecting the transformer core 12.
In the embodiment of the present invention, the transformer 1 includes a transformer core 11 and a transformer housing 12, the transformer core 11 passes through the transformer housing 12 single-point reliable grounding.
Specifically, a first end of the capacitor C is connected to the transformer core 11 through the second switch K2, a second end of the capacitor C is connected to the transformer housing 12, the transformer core 11 is discharged through the capacitor C, the capacitor C generates a large current during the discharging process, which is sufficient to burn out the grounding object at the fault point, or the capacitor C generates a large impact current during the discharging process, so that the grounding positions except the transformer housing 12 are shifted, thereby eliminating the fault of the transformer core grounding at multiple points.
In addition, the fault handling circuit further comprises a resistor divider connected in parallel with the capacitor C, the resistor divider comprising a first divider resistor R1 and a second divider resistor R2 connected in series, by which the voltage across the capacitor C is measured.
In addition, the fault processing circuit further comprises a capacitor discharge circuit connected in parallel with the capacitor C, wherein the capacitor discharge circuit comprises a third switch K3 and a discharge resistor R3 which are connected in series, the charge on the capacitor C is discharged through the discharge resistor R3, and the process of discharging the charge is controlled through the third switch K3.
The embodiment of the utility model provides a transformer core multiple spot ground connection's fault handling circuit, fault handling circuit's working process as follows: selecting the output voltage of the DC power supply DC, turning on the first switch K1, and turning off the second switch K2 and the third switch K3, wherein the DC power supply DC charges the capacitor C through the charging resistor R0; monitoring the voltage of the capacitor C in real time through the resistor voltage divider, when the real-time voltage on the capacitor C reaches 80% of a preset voltage value, disconnecting the first switch K1, and switching on the second switch K2, wherein the third switch K3 is in a disconnected state, and discharging electricity to the transformer core 11 through the capacitor C to eliminate the fault of multipoint grounding of the transformer core; the real-time voltage of the capacitor C continuously drops in the discharging process, and when the real-time voltage of the capacitor C drops to 20% of a preset voltage value, the second switch K2 is opened, and the first switch K1 is turned on again, so that the cycle is repeated.
In addition, when the fault processing circuit continuously operates for a period of time and multipoint earth faults are eliminated, the real-time voltage of the capacitor C cannot be reduced to 20% of the preset voltage value; to solve this problem, when the operation time of the fault handling circuit reaches a preset time value, the first switch K1 and the second switch K2 are turned off, the third switch K3 is turned on, and the charge on the capacitor C is discharged through the discharge resistor R3.
The embodiment of the utility model provides a fault treatment circuit of transformer core multiple spot ground connection, fault treatment circuit adopts the electric capacity impact method to handle transformer core multiple spot ground connection's trouble, has simple high efficiency, labour saving and time saving's advantage, and has reduced the power off time, has fine practicality.
In addition, the above detailed description is made on the fault processing circuit for transformer core multipoint grounding provided by the embodiment of the present invention, and a specific example should be adopted herein to explain the principle and the implementation manner of the present invention, and the description of the above embodiment is only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (4)
1. The fault processing circuit for the multipoint grounding of the transformer iron core is characterized by comprising a transformer, a capacitor and a capacitor charging circuit, wherein the capacitor is connected with the transformer in parallel;
the capacitor charging loop comprises a direct current power supply, a charging resistor and a first switch, wherein the positive electrode of the direct current power supply is connected with the first end of the capacitor through the charging resistor and the first switch which are connected in series, and the negative electrode of the direct current power supply is connected with the second end of the capacitor;
the transformer comprises a transformer iron core and a transformer shell, and the transformer iron core is grounded through the transformer shell; the first end of the capacitor is connected with the transformer iron core through a second switch, and the second end of the capacitor is connected with the transformer shell.
2. The fault handling circuit of claim 1, further comprising a resistor divider connected in parallel with the capacitor, the resistor divider comprising a first divider resistor and a second divider resistor connected in series.
3. The fault handling circuit of claim 1, further comprising a capacitor discharge loop in parallel with the capacitor, the capacitor discharge loop comprising a third switch and a discharge resistor in series.
4. The fault handling circuit of claim 1, wherein the dc power supply is an adjustable dc power supply having an output voltage adjustment range of 0kV to 6 kV.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921688814.3U CN210608516U (en) | 2019-10-10 | 2019-10-10 | Transformer core multipoint earthing's fault handling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921688814.3U CN210608516U (en) | 2019-10-10 | 2019-10-10 | Transformer core multipoint earthing's fault handling circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210608516U true CN210608516U (en) | 2020-05-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921688814.3U Active CN210608516U (en) | 2019-10-10 | 2019-10-10 | Transformer core multipoint earthing's fault handling circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210608516U (en) |
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2019
- 2019-10-10 CN CN201921688814.3U patent/CN210608516U/en active Active
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