CN109473959B - Overvoltage protection device of transformer substation and transformer substation - Google Patents
Overvoltage protection device of transformer substation and transformer substation Download PDFInfo
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- CN109473959B CN109473959B CN201811233385.0A CN201811233385A CN109473959B CN 109473959 B CN109473959 B CN 109473959B CN 201811233385 A CN201811233385 A CN 201811233385A CN 109473959 B CN109473959 B CN 109473959B
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- substation
- conductive
- electrically connected
- overvoltage protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/16—Earthing arrangements
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- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention provides an overvoltage protection device of a transformer substation and the transformer substation, wherein the overvoltage protection device of the transformer substation comprises: one end of the conductive lead is electrically connected with the transformation equipment of the transformer substation, and the other end of the conductive lead is electrically connected with the ground; the current sensor is electrically connected with the conductive lead so as to detect the magnitude of current passing through the conductive lead; the guide pipe is made of a conductive material, one end of the guide pipe is electrically connected with the transformation equipment of the transformer substation, and the other end of the guide pipe is arranged at intervals with the ground; the container is arranged above the ground, is used for storing the conductive liquid and is communicated with the flow guide pipe through a connecting pipe; the control valve is arranged on the connecting pipe to control the connection and disconnection of the connecting pipe; and the controller is electrically connected with the current sensor and the control valve and controls the control valve to be opened or closed according to the detection result of the current sensor. So set up for the anti overvoltage device of this transformer substation can adjust its speed of discharging according to the demand, and then has improved the security of this transformer substation.
Description
Technical Field
The invention relates to the technical field of overvoltage preventing equipment of a transformer substation, in particular to an overvoltage preventing device of a transformer substation and the transformer substation.
Background
The existing transformer substation is generally provided with a grounding wire to be connected with ground so as to ensure the safety of the transformation equipment and personnel of the transformer substation. However, when the substation equipment of the substation needs to release a large current, the ground lead needs to bear a large short-circuit current, which easily causes the substation equipment of the substation not to release the current in time and causes the substation equipment of the substation to be damaged; meanwhile, the grounding wire is exposed to the outside and is easy to corrode, so that the conductive effect of the grounding wire is further reduced.
Disclosure of Invention
The invention aims to provide an overvoltage protection device of a transformer substation, which discharges by increasing a water column formed by a conductive liquid, so that the discharge speed can be changed according to requirements.
The invention provides an overvoltage protection device for a transformer substation, which comprises: one end of the conductive lead is electrically connected with the transformation equipment of the transformer substation, and the other end of the conductive lead is electrically connected with the ground; the current sensor is electrically connected with the conductive lead so as to detect the magnitude of current passing through the conductive lead; the guide pipe is made of a conductive material, one end of the guide pipe is electrically connected with the transformation equipment of the transformer substation, and the other end of the guide pipe is arranged at intervals with the ground; the container is arranged above the ground, is used for storing the conductive liquid and is communicated with the flow guide pipe through a connecting pipe; the control valve is arranged on the connecting pipe to control the connection and disconnection of the connecting pipe; and the controller is electrically connected with the current sensor and the control valve, and controls the control valve to be opened or closed according to the detection result of the current sensor.
Wherein the opening degree of the control valve can be adjusted; the controller controls the opening of the control valve according to the detection result of the current sensor.
The distance between one end, away from the transformer equipment of the transformer substation, of the flow guide pipe and the ground is 80-200 mm.
Wherein, the honeycomb duct adopts metal copper to make.
Wherein the resistance of the conductive liquid is less than the resistance setting of the conductive lead.
Wherein the conductive liquid is sodium chloride or aluminum chloride.
Wherein the conductive lead is arranged in a tubular shape; the guide pipe is inserted into the conductive lead from one end, adjacent to the transformer equipment of the transformer substation, of the conductive lead.
The overvoltage protection device of the transformer substation further comprises a grounding grid arranged on the ground, and the grounding grid is electrically connected with the conductive lead.
The overvoltage protection device of the transformer substation comprises a plurality of conductive leads arranged in parallel, one end of each conductive lead is electrically connected with the transformation equipment of the transformer substation, and the other end of each conductive lead is electrically connected with the ground.
The invention provides a transformer substation, which comprises a transformer device and a room overvoltage device of the transformer device, wherein the room overvoltage device of the transformer device comprises: one end of the conductive lead is electrically connected with the transformation equipment of the transformer substation, and the other end of the conductive lead is electrically connected with the ground; the current sensor is electrically connected with the conductive lead so as to detect the magnitude of current passing through the conductive lead; the guide pipe is made of a conductive material, one end of the guide pipe is electrically connected with the transformation equipment of the transformer substation, and the other end of the guide pipe is arranged at intervals with the ground; the container is arranged above the ground, is used for storing the conductive liquid and is communicated with the flow guide pipe through a connecting pipe; the control valve is arranged on the connecting pipe to control the connection and disconnection of the connecting pipe; and the controller is electrically connected with the current sensor and the control valve, and controls the control valve to be opened or closed according to the detection result of the current sensor.
According to the technical scheme, the power transformation equipment of the transformer substation is connected with the ground through the conductive lead, so that the current on the power transformation equipment of the transformer substation can be led into the ground through the conductive lead; the discharge lines of the transformer equipment of the transformer substation connected with the ground are increased by arranging a guide pipe, a container, a control valve and a controller; the conductive lead is also electrically connected with the current sensor, the controller controls the control valve to be opened or closed according to the detection result of the current sensor, so that the on-off of another discharge circuit formed by the guide pipe, the container, the control valve and the controller is convenient to control, the arrangement is carried out, the discharge speed of the overvoltage protection device of the transformer substation can be adjusted according to the requirement, the problem that the conductive lead is damaged due to overhigh current passing through the conductive lead is avoided, and meanwhile, the safety of transformer equipment of the transformer substation is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 structural diagram of a substation according to an embodiment of the present invention.
| Reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | |
50 | |
| 10 | |
60 | |
| 20 | |
70 | Connecting |
| 30 | |
80 | |
| 40 | Container with a lid |
Detailed Description
The following description of the embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments in which the invention may be practiced.
Referring to fig. 1, the overvoltage protection device of the substation is applied to a substation 100, and includes a conductive lead 10, a current sensor 20, a flow guide pipe 30, a container 40, a control valve 50, and a controller; one end of the conductive lead 10 is electrically connected to the power transformation device 60 of the substation 100, and the other end of the conductive lead 10 is electrically connected to ground; the current sensor 20 is electrically connected to the conductive lead 10 to detect the magnitude of the current passing through the conductive lead 10; the draft tube 30 is made of a conductive material, one end of which is electrically connected to the power transformation device 60 of the substation 100, and the other end of which is spaced from the ground; the container 40 is installed above the ground, and can be supported by a bracket, a mounting platform, and other carriers, the container 40 is used for storing the conductive liquid, and the container 40 is arranged in communication with the flow guide pipe 30 through a connecting pipe 70; the control valve 50 is installed on the connection pipe 70 for controlling the connection and disconnection of the connection pipe 70 for communicating the draft tube 30 and the vessel 40; the controller is electrically connected to both the current sensor 20 and the control valve 50, and controls the control valve 50 to be opened or closed according to the detection result of the current sensor 20.
It should be noted that when the controller controls the control valve 50 to open or close is closely related to the magnitude of the current passing through the conductive lead 10 detected by the current sensor 20 according to a preset current value, specifically, when the current sensor 20 detects a real-time current value passing through the conductive lead 10 and sends the real-time current value to the controller, the controller compares the real-time current value with the preset current value, and if the real-time current value is smaller than the preset current value, the controller controls the control valve 50 to keep a closed state; if the real-time current value is greater than or equal to the preset current value, the controller controls the control valve 50 to open, so that the conductive liquid in the container 40 enters the guide pipe 30 through the connecting pipe 70, and a water column contacting with the ground can be formed when the continuous conductive liquid flows downwards through the guide pipe 30, so that the guide pipe 30 is connected with the ground, and thus, a discharging path is added to the power transformation equipment 60 of the substation 100, the problem that the conductive lead 10 is damaged due to overhigh current passing through the conductive lead 10 is solved, and meanwhile, the safety of the power transformation equipment 60 of the substation 100 is improved.
It should be noted that the magnitude of the current passing through the conductive lead 10 of the substation equipment 60 of the substation 100 is variable, and if the real-time flow rate of the conductive liquid is kept constant and the current passing through the conductive lead 10 is too small, the conductive liquid is wasted. And the calculation formula of the resistance is R = ρ L/S, where ρ is the resistance value of the resistive material, L is the length of the resistive material, and S is the cross-sectional area of the resistive material, and the values of the flow guide tube 30 are fixed, so that the discharge speed of the water column formed by the conductive liquid can only be changed by changing the cross-sectional area of the water column formed by the conductive liquid, and in view of this, in an embodiment of the present invention, the opening degree of the control valve 50 is adjustably set; the controller controls the opening of the control valve 50 based on the detection result of the current sensor 20.
Specifically, the control valve 50 is provided with a first gear, a second gear and a third gear … … N gear, the controller is provided with continuous current intervals, namely, the first current interval is set corresponding to the first gear, the second current interval is set corresponding to the second gear, the third current interval is set corresponding to the third gear … …, the nth current interval is set corresponding to the N gear, after receiving the real-time current value detected by the current sensor 20, the controller judges which current interval the real-time current value passing through the conductive lead 10 falls in, and then controls the opening of the control valve 50, so that the use of the conductive liquid can be saved.
It should be noted that the flow guide tube 30 is generally made of a material with a good electrical conductivity, such as metal copper, metal aluminum, and the like, and preferably, the conductive tube is made of metal copper, which has a relatively low resistivity, so that the electrical resistance of the flow guide tube 30 can be reduced, and the electrical conductivity of the flow guide tube 30 is further improved.
Further, the resistance of the conductive liquid is smaller than the resistance value of the conductive lead 10, so that the conductivity of the water column formed by the conductive liquid is better than that of the conductive lead 10, and after the controller controls the control valve 50 to be opened, the discharging speed of the overvoltage protection device of the transformer substation can be rapidly improved, so that the current on the transformer equipment 60 of the transformer substation 100 can be led to the ground, and the performance of the overvoltage protection device of the transformer substation can be improved.
It should be noted that if the conductive liquid is corrosive, the conductive liquid may be in contact with the flow guide tube 30 for a long time to corrode the flow guide tube 30, and therefore, the conductive liquid is formed of a non-corrosive solution with high conductivity, such as sodium chloride or aluminum chloride, so as to ensure that the flow guide tube 30 is not corroded and that the conductive liquid is discharged to the ground without damaging the soil.
It should be noted that, when the conductive liquid is discharged to the outside through the duct 30, if the external environment has a strong wind, the conductive liquid discharged from the end of the duct 30 away from the substation equipment 60 of the substation 100 is easily discontinuous and discontinuous under the action of the strong wind, in view of this, in an embodiment of the present invention, the conductive lead 10 is disposed in a tubular shape, that is, the conductive lead 10 may be a copper pipe, an aluminum pipe, or the like, the duct 30 is inserted into the conductive lead 10 from the end of the conductive lead 10 adjacent to the substation equipment 60 of the substation 100, and the end of the duct 30 away from the ground is fixedly connected to the substation equipment 60 of the substation 100. Because the conducting lead 10 is directly connected with the ground, namely the conducting lead 10 directly extends to the ground, the water column formed by the conducting liquid is ensured not to be interfered by external factors, and the performance of the overvoltage protection device of the transformer substation is further ensured.
Considering that the draft tube 30 is spaced from the ground, if the distance between the end of the draft tube 30 away from the power transformation equipment 60 of the substation 100 and the ground is too large, when the conductive liquid flows downwards through the draft tube 30, the water column formed by the conductive liquid may be discontinuous and discontinuous, and thus the discharge of the power transformation equipment 60 of the substation 100 is affected; if the distance between the end of the draft tube 30 remote from the power transformation equipment 60 of the substation 100 and the ground is too small, the consumable items of the draft tube 30 increase. In view of this, in an embodiment of the present invention, the distance between the end of the draft tube 30 away from the power transformation device 60 of the substation 100 and the ground is set to be 80-200 mm. With the arrangement, on one hand, the water column formed by the conducting liquid passing through the flow guide pipe 30 can be ensured to be continuous and stable, so that the flow guide pipe 30 and the conducting liquid can continuously and stably lead the current on the transformer equipment 60 of the transformer substation 100 to the ground, and the effectiveness of the overvoltage preventer of the transformer substation is ensured; on the other hand, the loss of materials for manufacturing the guide pipe 30 can be saved, and the production cost of the overvoltage protection device of the transformer substation is reduced.
In order to ensure the performance of the overvoltage protector of the substation, in one embodiment of the invention, the overvoltage protector of the substation further comprises a grounding grid 80 mounted on the ground, and the grounding grid 80 is electrically connected with the conductive leads 10. The grounding grid 80 increases the grounding area of the conductive lead 10, thereby accelerating the discharging speed of the conductive lead 10.
Obviously, the number of the conductive leads 10 can also be increased to increase the discharge speed of the overvoltage protection device of the substation, that is, a plurality of conductive leads 10 are arranged in parallel, one end of each conductive lead 10 is electrically connected with the power transformation equipment 60 of the substation 100, and the other end of each conductive lead 10 is connected with the ground.
Of course, the discharge speed of the overvoltage protection device of the substation may also be increased in other ways, which are not listed here.
The present invention further provides a substation 100, where the substation 100 includes a power transformation device 60 and an overvoltage protection device of the substation, and the specific structure of the overvoltage protection device of the substation refers to the above embodiments, and since the substation 100 adopts all technical solutions of all the above embodiments, at least all beneficial effects brought by the technical solutions of the above embodiments are achieved, and details are not repeated here.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (9)
1. An overvoltage protection device for a substation, comprising:
one end of the conductive lead is electrically connected with the transformation equipment of the transformer substation, and the other end of the conductive lead is electrically connected with the ground;
the current sensor is electrically connected with the conductive lead so as to detect the magnitude of current passing through the conductive lead;
the guide pipe is made of a conductive material, one end of the guide pipe is electrically connected with the transformation equipment of the transformer substation, and the other end of the guide pipe is arranged at intervals with the ground;
the container is arranged above the ground, is used for storing the conductive liquid and is communicated with the flow guide pipe through a connecting pipe;
the control valve is arranged on the connecting pipe to control the connection and disconnection of the connecting pipe; and
the controller is electrically connected with the current sensor and the control valve and controls the control valve to be opened or closed according to the detection result of the current sensor;
the opening degree of the control valve can be adjusted; the controller controls the opening of the control valve according to the detection result of the current sensor; the control valve is used for changing the cross sectional area of the water column formed by the conductive liquid to change the discharge speed of the water column formed by the conductive liquid.
2. The overvoltage protection device of a substation according to claim 1, wherein the distance between the end of the draft tube away from the substation equipment of the substation and the ground is 80-200 mm.
3. The overvoltage protection device for a substation according to claim 1, wherein the draft tube is made of copper.
4. The overvoltage protection device of a substation according to claim 1, wherein the resistance of the conductive liquid is smaller than the resistance setting of the conductive lead.
5. The overvoltage protection device of a substation according to claim 4, wherein the conductive liquid is sodium chloride or aluminum chloride.
6. An overvoltage protection device for a substation according to claim 1, wherein the conductive leads are arranged in a tubular shape; the guide pipe is inserted into the conductive lead from one end, adjacent to the transformer equipment of the transformer substation, of the conductive lead.
7. The overvoltage protection device of a substation according to any one of claims 1 to 6, further comprising a grounding grid mounted on the ground, the grounding grid being electrically connected to the conductive leads.
8. Overvoltage protection for a substation according to any of claims 1 to 6, characterized in that it comprises a number of parallel arranged electrically conducting leads, which are electrically connected at one end to the substation equipment of the substation and at the other end to ground.
9. A substation, characterized in that it comprises a transformation device and an overvoltage protection device according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811233385.0A CN109473959B (en) | 2018-10-23 | 2018-10-23 | Overvoltage protection device of transformer substation and transformer substation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811233385.0A CN109473959B (en) | 2018-10-23 | 2018-10-23 | Overvoltage protection device of transformer substation and transformer substation |
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| Publication Number | Publication Date |
|---|---|
| CN109473959A CN109473959A (en) | 2019-03-15 |
| CN109473959B true CN109473959B (en) | 2020-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811233385.0A Active CN109473959B (en) | 2018-10-23 | 2018-10-23 | Overvoltage protection device of transformer substation and transformer substation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114188864B (en) * | 2021-12-16 | 2023-09-19 | 深圳供电局有限公司 | Discharging device and transformer substation |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203660075U (en) * | 2013-12-11 | 2014-06-18 | 四川中光防雷科技股份有限公司 | Fluid conductive medium grounding device and application system thereof |
| CN104134987A (en) * | 2014-08-18 | 2014-11-05 | 赖真华 | Lightningproof low-voltage electrical equipment |
| CN207765627U (en) * | 2018-01-10 | 2018-08-24 | 湖南中普技术股份有限公司 | A kind of Fast Installation and the grounding-for-lightning device of storage |
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2018
- 2018-10-23 CN CN201811233385.0A patent/CN109473959B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203660075U (en) * | 2013-12-11 | 2014-06-18 | 四川中光防雷科技股份有限公司 | Fluid conductive medium grounding device and application system thereof |
| CN104134987A (en) * | 2014-08-18 | 2014-11-05 | 赖真华 | Lightningproof low-voltage electrical equipment |
| CN207765627U (en) * | 2018-01-10 | 2018-08-24 | 湖南中普技术股份有限公司 | A kind of Fast Installation and the grounding-for-lightning device of storage |
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| CN109473959A (en) | 2019-03-15 |
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