CN116381315A - High-voltage direct-current electroscope - Google Patents
High-voltage direct-current electroscope Download PDFInfo
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Abstract
The application relates to the technical field of high-voltage electroscope and provides a high-voltage direct-current electroscope, which comprises an induction probe, an acquisition module, a support rod, an insulating sleeve, a grounding piece and a ground terminal, wherein the induction probe is connected with the acquisition module; the induction probe is arranged at the first end of the supporting rod and is used for sensing an electric field signal of the direct current side of the equipment to be tested when the induction probe is close to the direct current side of the equipment to be tested on the high-voltage line; the acquisition module is electrically connected with the induction probe and is arranged at the first end of the supporting rod, and the acquisition module is used for generating and sending an electric signal and a non-electric signal to the ground terminal according to the electric field signal; the electrical signal is used for representing the voltage of the direct current side of the device to be tested; the insulation sleeve is sleeved at the second end of the support rod; one end of the grounding piece is fixedly connected with the supporting rod, and the other end of the grounding piece is grounded through a wire; the ground terminal is in wireless communication connection with the acquisition module and is used for receiving the electrical signals and displaying the voltage of the direct current side of the equipment to be tested. The high-voltage direct current electroscope can improve the working reliability of the electroscope and ensure the safety of operators.
Description
Technical Field
The application relates to the technical field of high-voltage electroscope, in particular to a high-voltage direct-current electroscope.
Background
According to the safety working regulations of the power industry, before the electric equipment with power failure is grounded, the electric equipment is subjected to electricity inspection, and no voltage on the electric equipment is verified, so that the safety operation of operators is ensured.
Because the voltage of the ice melting device in the transformer substation and the converter station is difficult to determine, if the lower-level electroscope is adopted for electroscope, operators cannot know the working condition of the electroscope in time, the electroscope can be damaged, the working reliability of the electroscope is reduced, and the personal safety of the operators is even threatened.
Disclosure of Invention
In view of the above, it is necessary to provide a high-voltage direct-current electroscope which improves the operational reliability of the electroscope and ensures the safety of operators.
The application provides a high-voltage direct current electroscope, which comprises an induction probe, a collection module, a support rod, an insulating sleeve, a grounding piece and a ground terminal;
the induction probe is arranged at the first end of the supporting rod and is used for sensing an electric field signal of the direct current side of the equipment to be tested when the induction probe is close to the direct current side of the equipment to be tested on the high-voltage line;
the acquisition module is electrically connected with the induction probe and is arranged at the first end of the supporting rod, and the acquisition module is used for generating and sending an electric signal and a non-electric signal to the ground terminal according to the electric field signal; the electrical signal is used for representing the voltage of the direct current side of the device to be tested;
the insulation sleeve is sleeved at the second end of the support rod;
one end of the grounding piece is fixedly connected with the supporting rod, and the other end of the grounding piece is grounded through a wire;
the ground terminal is in wireless communication connection with the acquisition module, and is used for receiving the electric signal and displaying the voltage of the direct current side of the equipment to be tested.
In one embodiment, the acquisition module comprises a sensor, a signal following circuit, a filter circuit, a subtraction circuit, an amplifying circuit, a signal indicating circuit, a power supply circuit and a wireless transmission circuit;
the sensor is electrically connected with the induction probe and the signal following circuit and is used for converting an electric field signal into an induction voltage signal and outputting the induction voltage signal to the signal following circuit;
the signal follower circuit is used for following the induced voltage signal to obtain a first voltage signal, and outputting the first voltage signal to the filter circuit;
the filter circuit is electrically connected with the subtraction circuit and is used for carrying out low-pass filtering on the first voltage signal to obtain a second voltage signal and outputting the second voltage signal to the subtraction circuit;
the subtracting circuit is electrically connected with the amplifying circuit and is used for carrying out common mode rejection on the second voltage signal to obtain a third voltage signal and outputting the third voltage signal to the amplifying circuit;
the amplifying circuit is connected with the signal indicating circuit and is used for amplifying the third voltage signal into a fourth voltage signal matched with the working input of the signal indicating circuit and outputting the fourth voltage signal to the signal indicating circuit;
the signal indication circuit is in communication connection with the ground terminal through the wireless transmission circuit and is used for outputting and sending an electrical signal to the ground terminal when receiving the fourth voltage signal and outputting and sending a non-electrical signal to the ground terminal when not receiving the fourth voltage signal;
the power supply circuit is used for supplying power to the sensor, the signal following circuit, the filter circuit, the subtraction operation circuit, the amplifying circuit, the signal indication circuit and the wireless transmission circuit.
In one embodiment, the hvdc electroscope further comprises:
the test box is provided with an accommodating space;
the sensor, the signal following circuit, the filter circuit, the subtracting operation circuit, the amplifying circuit, the signal indicating circuit, the power supply circuit and the wireless transmission circuit are all arranged in the accommodating space of the test box.
In one embodiment, the hvdc electroscope further comprises:
the LED indicator lamp is arranged on the outer surface of the test box, is connected with the signal indicating circuit, works when receiving the electrical signal output by the signal indicating circuit, and is extinguished when receiving the wireless signal output by the signal indicating circuit.
In one embodiment, the high voltage direct current electroscope further comprises an audible and visual alarm;
the audible and visual alarm is electrically connected with the power supply circuit, and is used for obtaining electricity from the power supply circuit to work when the signal indicating circuit outputs an electrical signal.
In one embodiment, the high voltage direct current electroscope further comprises a self-test button disposed on an exterior surface of the test case;
the self-checking button is connected with the power supply circuit and the audible and visual alarm, and when the self-checking button is in a pressing state, the power supply circuit supplies power to the audible and visual alarm.
In one embodiment, the wireless transmission circuit is used for connecting with the ground terminal, and the wireless transmission circuit is used for sending the electric signal and the non-electric signal to the ground terminal for displaying.
In one embodiment, the filter circuit is a first order butterworth low pass filter having a cut-off frequency of 50Hz.
In one embodiment, the grounding member includes a fixing nut, a connecting bolt, a claw nut, a grounding wire clip, a tightening bolt, and a wire;
the support rod is provided with a threaded hole, one end of the connecting bolt is fixedly connected with the claw nut, and the connecting bolt penetrates through the fixing nut to be in threaded connection with the threaded hole of the support rod;
the first end of the wire is wound on the connecting bolt, and when the claw nut drives the connecting bolt to rotate to compress the fixing nut, the claw nut and the fixing nut clamp the first end of the wire;
the ground wire clip is fixed on the ground, and the ground wire clip is connected with the second end of the wire.
In one embodiment, a ground terminal includes a processor and a display screen;
the processor is respectively connected with the wireless transmission circuit and the display screen; the processor is used for driving the display screen to display the electrical signals and the non-electrical signals.
The high-voltage direct-current electroscope comprises an induction probe, an acquisition module, a supporting rod, an insulating sleeve, a grounding piece and a ground terminal, wherein the induction probe is used for sensing an electric field signal of the direct-current side of equipment to be tested when the induction probe is close to the direct-current side of the equipment to be tested on a high-voltage line; the acquisition module is electrically connected with the induction probe and is used for generating and sending an electrical signal and a non-electrical signal to the ground terminal according to the electric field signal; the electrical signal is used for representing the voltage magnitude of the direct current side of the device to be tested; the insulation sleeve is sleeved at the second end of the support rod; one end of the grounding piece is fixedly connected with the supporting rod, and the other end of the grounding piece is grounded through a wire; the ground terminal is in wireless communication connection with the acquisition module, and is used for receiving the electric signal and displaying the voltage of the direct current side of the equipment to be tested. Through the structure, the induction probe is used for detecting the electric field signal of the direct current end of the equipment to be detected, the electric signal is obtained through the processing of the acquisition module and is sent to the ground terminal, so that an operator can directly know the electrification condition of the direct current side of the equipment to be detected through the display information of the ground terminal, the working reliability of the electroscope is improved, and meanwhile the safety of the operator is also ensured.
Drawings
FIG. 1 is a schematic diagram of a HVDC electroscope in one embodiment;
fig. 2 is a schematic structural diagram of an acquisition module in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.
In one embodiment, as shown in fig. 1, a high voltage direct current electroscope is provided, comprising an inductive probe 1, a collection module 2, a support rod 3, an insulating sleeve 4, a grounding member 5 and a ground terminal 6.
The induction probe 1 is arranged at a first end of the supporting rod 3 and is used for sensing an electric field signal of the direct current side of the equipment to be tested when the induction probe is close to the direct current side of the equipment to be tested on a high-voltage line; the acquisition module 2 is electrically connected with the induction probe 1, the acquisition module 2 is arranged at the first end of the supporting rod 3, and the acquisition module 2 is used for generating and sending an electric signal and a non-electric signal to the ground terminal 6 according to an electric field signal; the electrical signal is used for representing the voltage of the direct current side of the device to be tested; the insulation sleeve 4 is sleeved at the second end of the support rod 3; one end of the grounding piece 5 is fixedly connected with the supporting rod 3, and the other end of the grounding piece 5 is grounded through a wire 58; the ground terminal 6 is in wireless communication connection with the acquisition module 2, and the ground terminal 6 is used for receiving the electrical signal and displaying the voltage of the direct current side of the equipment to be tested.
Specifically, the inductive probe 1 is disposed at a first end of the supporting rod 3, that is, an end of the supporting rod 3 facing the dc side of the device to be tested, and the inductive probe 1 is made of a conductor for sensing an electric field signal of the dc side of the device to be tested when approaching the dc side of the device to be tested on the high voltage line. The induction probe 1 is electrically connected with the acquisition module 2 through a wire, and the acquisition module 2 processes an electric field signal acquired by the induction probe 1 to generate and send an electric signal to the ground terminal 6 in a wireless transmission mode. The ground terminal 6 is used for receiving the electrical signal and displaying the voltage of the direct current side of the device to be tested, so that an operator can directly know the electrification condition of the direct current side of the device to be tested on the ground.
Wherein, insulating cover 4 cover is established at the second end of bracing piece 3, and when the operation, operating personnel need hold the second end of bracing piece 3 to guarantee that electric field signal can not flow through the human body through bracing piece 3, cause the injury to operating personnel. One end of the grounding piece 5 is fixedly connected with the supporting rod 3, and the other end of the grounding piece 5 is grounded through a wire 58, so that the electroscope can be ensured to work normally.
The high-voltage direct-current electroscope comprises an induction probe 1, an acquisition module 2, a support rod 3, an insulation sleeve 4, a grounding piece 5 and a ground terminal 6, wherein the induction probe 1 is used for sensing an electric field signal of a direct-current side of equipment to be tested when the induction probe is close to the direct-current side of the equipment to be tested on a high-voltage line; the acquisition module 2 is electrically connected with the induction probe 1, and the acquisition module 2 is used for generating and transmitting an electrical signal and a non-electrical signal to the ground terminal 6 according to the electric field signal; the electrical signal is used for representing the voltage of the direct current side of the device to be tested; the insulation sleeve 4 is sleeved at the second end of the support rod 3; one end of the grounding piece 5 is fixedly connected with the supporting rod 3, and the other end of the grounding piece 5 is grounded through a wire 58; the ground terminal 6 is in wireless communication connection with the acquisition module 2, and the ground terminal 6 is used for receiving the electrical signal and displaying the voltage of the direct current side of the equipment to be tested. Through the structure, the induction probe 1 is used for detecting the electric field signal of the direct current end of the equipment to be detected, the electric signal is obtained through the processing of the acquisition module 2 and is sent to the ground terminal 6, so that an operator can directly know the electrification condition of the direct current side of the equipment to be detected through the display information of the ground terminal 6, the working reliability of the electroscope is improved, and meanwhile the safety of the operator is also ensured.
In one embodiment, as shown in fig. 2, the acquisition module 2 includes a sensor 201, a signal follower circuit 202, a filter circuit 203, a subtraction circuit 204, an amplification circuit 205, a signal indication circuit 206, a power supply circuit 207, and a wireless transmission circuit 208.
The sensor 201 is electrically connected with the inductive probe 1 and the signal follower circuit 202, and is used for converting an electric field signal into an induced voltage signal and outputting the induced voltage signal to the signal follower circuit 202;
the signal follower circuit 202 is configured to follow the induced voltage signal to obtain a first voltage signal, and output the first voltage signal to the filter circuit 203;
the filter circuit 203 is electrically connected to the subtracting circuit 204, and the filter circuit 203 is configured to perform low-pass filtering on the first voltage signal to obtain a second voltage signal, and output the second voltage signal to the subtracting circuit 204;
the subtracting circuit 204 is electrically connected to the amplifying circuit 205, and the subtracting circuit 204 is configured to perform common mode rejection on the second voltage signal to obtain a third voltage signal, and output the third voltage signal to the amplifying circuit 205;
the amplifying circuit 205 is connected to the signal indicating circuit 206, and the amplifying circuit 205 is configured to amplify the third voltage signal to a fourth voltage signal that matches the operation input of the signal indicating circuit 206, and output the fourth voltage signal to the signal indicating circuit 206;
the signal indication circuit 206 is in communication connection with the ground terminal 6 through the wireless transmission circuit 208, and the signal indication circuit 206 is configured to output and send an electrical signal to the ground terminal 6 when receiving the fourth voltage signal, and output and send a no-electrical signal to the ground terminal 6 when not receiving the fourth voltage signal;
the power supply circuit 207 is configured to supply power to the sensor 201, the signal follower circuit 202, the filter circuit 203, the subtraction circuit 204, the amplification circuit 205, the signal instruction circuit 206, and the wireless transmission circuit 208.
Specifically, first, the sensor 201 converts an electric field signal sensed by the inductive probe 1 into an induced voltage signal; next, the signal follower circuit 202 follows the induced voltage signal to obtain a first voltage signal, and the first voltage signal is filtered by the filter circuit 203 to filter out high frequency noise therein, so as to obtain a second voltage signal. Then, the subtracting circuit 204 performs common mode rejection on the second voltage signal to subtract the interference signal between the adjacent circuits, thereby obtaining a third voltage signal. The amplifying circuit 205 amplifies the third voltage signal to obtain a fourth voltage signal, and the magnitude of the fourth voltage signal is matched with the working input of the signal indicating circuit 206. Finally, the signal indicating circuit 206 outputs and transmits an electrical signal to the ground terminal 6 when receiving the fourth voltage signal, and outputs and transmits a no-electrical signal to the ground terminal 6 when not receiving the fourth voltage signal.
The power supply circuit 207 of the acquisition module 2 supplies power to the sensor 201, the signal follower circuit 202, the filter circuit 203, the subtraction circuit 204, the amplifying circuit 205, the signal indicating circuit 206 and the wireless transmission circuit 208.
In this embodiment, by setting each stage of circuit module in the acquisition module 2, the acquired electric field signal is processed, and finally the electric signal with or without the electric signal is generated and transmitted, so that the accuracy of the electroscope can be improved.
In one embodiment, the hvdc electroscope further comprises:
the test box is provided with an accommodating space;
the sensor 201, the signal following circuit 202, the filter circuit 203, the subtraction circuit 204, the amplifying circuit 205, the signal indicating circuit 206, the power supply circuit 207 and the wireless transmission circuit 208 are all arranged in the accommodating space of the test box.
In one embodiment, the hvdc electroscope further comprises: the LED indicator lamp 7, the LED indicator lamp 7 sets up in the surface of inspection box, and LED indicator lamp 7 is connected with signal indication circuit 206, and LED indicator lamp 7 is when receiving the signal indication circuit 206 output have the signal to go out when receiving the wireless signal of signal indication circuit 206 output. Based on the setting, before the detection of the direct current side electric field of the device to be detected, the quick indication of whether the power exists or not can be performed in a plurality of stages in the detection. For example, before detection, the induction probe 1 may be brought close to an object for which electricity is determined, and at this time, if the LED indicator lamp 7 is turned on, it is indicated that the electroscope has no fault, and the electroscope can perform electroscopy normally. Otherwise, if the LED indicator 7 cannot be normally turned on, the failure of the electroscope is indicated, and maintenance is required. Based on the self-detection before the detection of the device to be detected, the detection reliability can be further improved.
In one embodiment, the high voltage direct current electroscope further comprises an audible and visual alarm; the audible and visual alarm is electrically connected with the power supply circuit 207, and the audible and visual alarm is used for obtaining electricity from the power supply circuit 207 when the signal indicating circuit 206 outputs an electrical signal.
In one embodiment, the high voltage direct current electroscope further comprises a self-test button 8 disposed on the outer surface of the test box;
the self-checking button 8 is connected with the power supply circuit 207 and the audible and visual alarm, and when the self-checking button 8 is in a pressed state, the power supply circuit 207 supplies power to the audible and visual alarm.
Specifically, before using the electroscope, the self-checking button 8 needs to be manually pressed to perform self-checking on the operation state of the electroscope. If the audible and visual alarm works normally, the electroscope is indicated to work normally.
In one embodiment, the wireless transmission circuit 208 is configured to connect to the ground terminal 6, and the wireless transmission circuit 208 is configured to send the electrical signal and the electrical signal to the ground terminal 6 for display.
In one embodiment, the filter circuit 203 is a first order butterworth low pass filter having a cut-off frequency of 50Hz.
In one embodiment, the grounding element 5 comprises a fixation nut 52, a connection bolt 53, a claw nut 54, a grounding wire clip 56, a tightening bolt 57 and a wire 58;
the support rod 3 is provided with a threaded hole, one end of a connecting bolt 53 is fixedly connected with a claw nut 54, and the connecting bolt 53 passes through the fixing nut 52 to be in threaded connection with the threaded hole of the support rod 3;
the first end of the wire 58 is wound on the connecting bolt 53, and when the claw nut 54 drives the connecting bolt 53 to rotate to compress the fixing nut 52, the claw nut 54 and the fixing nut 52 clamp the first end of the wire 58;
the ground wire clip 56 is secured to the ground and the ground wire clip 56 is connected to a second end of the wire 58.
The construction of the claw nut 54 facilitates the user's quick tightening and loosening of the wire 58. In addition, the contact surface for connecting the lead wires 58 can be increased by matching the fixing nut 52, so that the grounding reliability is further improved, and the safety in the operation process is ensured.
In one embodiment, the ground terminal 66 includes a processor and a display 62; the processor is connected with the wireless transmission circuit 208 and the display screen 62 respectively; the processor is used to drive the display 62 to display electrical signals with and without electrical signals. Through the communication connection between the ground terminal 6 and the wireless transmission circuit 208, the quick display of the electricity inspection result on the ground side can be realized, and the immediate acquisition of the detection result on the ground by workers is facilitated. In addition, the processor can also store received data such as electrical signals and non-electrical signals.
For a better understanding of the above method, a high voltage dc electroscope of the present application is described in detail below.
First, as shown in fig. 1, the hvth electroscope of the present application mainly comprises an induction probe 1, a collection module 2, a support rod 3, an insulating sleeve 4, a grounding member 5, and a ground terminal 6. The inductive probe 1 is arranged at a first end of the support rod 3. The acquisition module 2 is electrically connected with the induction probe 1, the acquisition module 2 comprises a sensor 201, a signal following circuit 202, a filter circuit 203, a subtraction circuit 204, an amplifying circuit 205, a signal indicating circuit 206, a power supply circuit 207 and a wireless transmission circuit 208, and the acquisition module 2 is arranged in an inspection box. The audible and visual alarm is connected with a power supply circuit 207, and an LED indicator lamp 7 and a self-checking button 8 are arranged on the outer surface of the test box. The insulating sleeve 4 is sleeved at the second end of the supporting rod 3, and the handle 9 is positioned below the insulating sleeve 4 at the second end of the supporting rod 3. One end of the grounding piece 5 is fixedly connected with the supporting rod 3, and the other end of the grounding piece 5 is grounded through a wire 58. The grounding piece 5 comprises a fixing nut 52, a connecting bolt 53, a claw nut 54, a grounding wire clip 56, a screwing bolt 57 and a wire 58; the support rod 3 is provided with a threaded hole, one end of a connecting bolt 53 is fixedly connected with a claw nut 54, and the connecting bolt 53 passes through the fixing nut 52 to be in threaded connection with the threaded hole of the support rod 3; the first end of the wire 58 is wound on the connecting bolt 53, and when the claw nut 54 drives the connecting bolt 53 to rotate to compress the fixing nut 52, the claw nut 54 and the fixing nut 52 clamp the first end of the wire 58; the ground wire clip 56 is secured to the ground and the ground wire clip 56 is connected to a second end of the wire 58. The ground terminal 6 includes a processor and a display 62; the processor is connected with the wireless transmission circuit 208 and the display screen 62 respectively; the processor is used to drive the display 62 to display electrical signals with and without electrical signals. In addition, the ground terminal 6 has a power key 64, an operation key 66, and a function key 68.
Secondly, when the induction probe 1 is close to the direct current side of the equipment to be tested on the high voltage line, the specific working process of the high voltage direct current electroscope comprises the following steps: the induction probe 1 senses an electric field signal of a direct current side of the equipment to be tested, and the sensor 201 in the acquisition module 2 converts the electric field signal into an induction voltage signal; the induced voltage passes through the signal follower circuit 202 to obtain a first voltage signal; the first voltage signal is subjected to low-pass filtering through a filter circuit 203 to obtain a second voltage signal; the second voltage signal is subjected to common mode rejection through a subtraction circuit 204 to obtain a third voltage signal; the third voltage signal is amplified by the amplifying circuit 205 and inputted to the signal indicating circuit 206, and the signal indicating circuit 206 transmits an electric signal to the ground terminal 6 via the wireless transmission circuit 208. The processor of the ground terminal 6 receives the signal from the wireless transmission circuit 208 and drives the display 62 of the ground terminal 6 to display the electrical signal and the non-electrical signal. The LED indicator lamp 7 is connected to the signal indicator circuit 206, and the LED indicator lamp 7 works when the signal indicator circuit 206 outputs an electrical signal.
In one embodiment, there are at least two acquisition modules 2, and each acquisition module 2 is connected in the manner described in the above embodiment. Through redundant design, for example, the acquisition modules 2 are two, two-way cross operation can be performed, and if two-way cross operation results are inconsistent, the existence of electroscope faults is indicated.
Specifically, the acquisition module 2 adopts a two-way cross operation mode, and performs cross check before the signal indicating circuit 206 outputs an electrical signal to the LED indicator lamp 7 and the ground terminal 6. Only when two paths of signals send out the electrical signals or the non-electrical signals at the same time, the electrical signals or the non-electrical signals are sent to the LED indicator lamp 7 and the ground terminal 6. If the two paths are inconsistent, the electroscope is judged to be in fault, and an electrical signal is cut off and cannot be sent to the LED indicator lamp 7 and the ground terminal 6.
Finally, in actual use, the actual operation process of the high-voltage direct-current electroscope comprises the following steps: the acquisition module 2 is fixedly connected with the support rod 3, one end of a wire 58 is fixed on the support rod 3 through a connecting bolt 53 and a claw nut 54, and the other end is grounded through a screwing bolt 57 and a grounding wire clip 56. The self-checking button 8 is pressed to check whether the audible and visual alarm works normally. The power key of the ground terminal 6 is pressed to activate the ground terminal 6. An operator holds a handle position 9 below the insulating sleeve 4, and approaches the induction probe 1 to the direct current side of the equipment to be tested, so that the acquisition module 2 works, and the working process of the high-voltage direct current electroscope is executed.
The high-voltage direct-current electroscope of the embodiment, the induction probe 1 is used for sensing an electric field signal of a direct-current side of the equipment to be tested when the induction probe is close to the direct-current side of the equipment to be tested on a high-voltage line; the acquisition module 2 is electrically connected with the induction probe 1, and the acquisition module 2 is used for generating and transmitting an electrical signal and a non-electrical signal to the ground terminal 6 according to the electric field signal; the electrical signal is used for representing the voltage of the direct current side of the device to be tested; the insulation sleeve 4 is sleeved at the second end of the support rod 3; one end of the grounding piece 5 is fixedly connected with the supporting rod 3, and the other end of the grounding piece 5 is grounded through a wire 58; the ground terminal 6 is in wireless communication connection with the acquisition module 2, and the ground terminal 6 is used for receiving the electrical signal and displaying the voltage of the direct current side of the equipment to be tested. Through the structure, the induction probe 1 is used for detecting the electric field signal of the direct current end of the equipment to be detected, the electric signal is obtained through the processing of the acquisition module 2 and is sent to the ground terminal 6, so that an operator can directly know the electrification condition of the direct current side of the equipment to be detected through the display information of the ground terminal 6, the working reliability of the electroscope is improved, and meanwhile the safety of the operator is also ensured.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples represent only a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. A high voltage direct current electroscope, comprising: the device comprises an induction probe, an acquisition module, a supporting rod, an insulating sleeve, a grounding piece and a ground terminal;
the induction probe is arranged at the first end of the supporting rod and is used for sensing an electric field signal of the direct current side of the equipment to be tested when the induction probe is close to the direct current side of the equipment to be tested on the high-voltage line;
the acquisition module is electrically connected with the induction probe and is arranged at the first end of the supporting rod, and the acquisition module is used for generating and sending an electric signal and a non-electric signal to the ground terminal according to the electric field signal; the electrical signal is used for representing the voltage of the direct current side of the equipment to be tested;
the insulation sleeve is sleeved at the second end of the supporting rod;
one end of the grounding piece is fixedly connected with the supporting rod, and the other end of the grounding piece is grounded through a wire;
the ground terminal is in wireless communication connection with the acquisition module, and is used for receiving the electrical signals and displaying the voltage of the direct current side of the equipment to be tested.
2. The hvth electroscope of claim 1 wherein the acquisition module comprises: the device comprises a sensor, a signal following circuit, a filter circuit, a subtraction circuit, an amplifying circuit, a signal indicating circuit, a power supply circuit and a wireless transmission circuit;
the sensor is electrically connected with the inductive probe and the signal following circuit and is used for converting the electric field signal into an inductive voltage signal and outputting the inductive voltage signal to the signal following circuit;
the signal follower circuit is used for following the induced voltage signal to obtain a first voltage signal, and outputting the first voltage signal to the filter circuit;
the filter circuit is electrically connected with the subtraction circuit, and is used for carrying out low-pass filtering on the first voltage signal to obtain a second voltage signal, and outputting the second voltage signal to the subtraction circuit;
the subtracting circuit is electrically connected with the amplifying circuit, and is used for carrying out common mode rejection on the second voltage signal to obtain a third voltage signal, and outputting the third voltage signal to the amplifying circuit;
the amplifying circuit is connected with the signal indicating circuit and is used for amplifying the third voltage signal into a fourth voltage signal matched with the working input of the signal indicating circuit and outputting the fourth voltage signal to the signal indicating circuit;
the signal indicating circuit is in communication connection with the ground terminal through the wireless transmission circuit, and is used for outputting and sending the all electric signals to the ground terminal when the fourth voltage signal is received, and outputting and sending the none electric signals to the ground terminal when the fourth voltage signal is not received;
the power supply circuit is used for supplying power to the sensor, the signal following circuit, the filter circuit, the subtraction circuit, the amplifying circuit, the signal indicating circuit and the wireless transmission circuit.
3. The hvth electroscope of claim 2 further comprising:
the test box is provided with an accommodating space;
the sensor, the signal following circuit, the filter circuit, the subtraction circuit, the amplifying circuit, the signal indicating circuit, the power supply circuit and the wireless transmission circuit are all arranged in the accommodating space of the test box.
4. A hvdc electroscope according to claim 3, further comprising:
the LED indicator lamp is arranged on the outer surface of the test box, the LED indicator lamp is connected with the signal indicating circuit, and the LED indicator lamp works when receiving the electrical signal output by the signal indicating circuit and is extinguished when receiving the wireless signal output by the signal indicating circuit.
5. A hvdc electroscope according to claim 3, further comprising an audible and visual alarm;
the audible and visual alarm is electrically connected with the power supply circuit, and is used for obtaining electricity from the power supply circuit to work when the signal indicating circuit outputs the all electric signals.
6. The hvth electroscope of claim 5 further comprising a self-test button disposed on an exterior surface of the test cell;
the self-checking button is connected with the power supply circuit and the audible and visual alarm, and when the self-checking button is in a pressing state, the power supply circuit supplies power to the audible and visual alarm.
7. The hvth electroscope of claim 2 wherein the wireless transmission circuit is configured to connect to a ground terminal, the wireless transmission circuit being configured to send the electrical signal and the no electrical signal to the ground terminal for display.
8. The high voltage direct current electroscope of claim 2 wherein the filter circuit is a first order butterworth low pass filter having a cut-off frequency of 50Hz.
9. The hvth electroscope of claim 1 wherein the ground comprises a set nut, a connecting bolt, a claw nut, a ground wire clip, a tightening bolt, and a wire;
the support rod is provided with a threaded hole, one end of the connecting bolt is fixedly connected with the claw nut, and the connecting bolt penetrates through the fixing nut to be in threaded connection with the threaded hole of the support rod;
the first end of the wire is wound on the connecting bolt, and when the claw nut drives the connecting bolt to rotate to press the fixing nut, the claw nut and the fixing nut clamp the first end of the wire;
the ground wire clip is fixed on the ground, and the ground wire clip is connected with the second end of the wire.
10. The hvth electroscope of claim 2 wherein the ground terminal comprises a processor and a display screen;
the processor is respectively connected with the wireless transmission circuit and the display screen; the processor is used for driving the display screen to display the all electric signals and the none electric signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211721727.XA CN116381315A (en) | 2022-12-30 | 2022-12-30 | High-voltage direct-current electroscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211721727.XA CN116381315A (en) | 2022-12-30 | 2022-12-30 | High-voltage direct-current electroscope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116381315A true CN116381315A (en) | 2023-07-04 |
Family
ID=86969975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211721727.XA Pending CN116381315A (en) | 2022-12-30 | 2022-12-30 | High-voltage direct-current electroscope |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116381315A (en) |
-
2022
- 2022-12-30 CN CN202211721727.XA patent/CN116381315A/en active Pending
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