CN212514749U - Novel self-energy-taking voltage sensor - Google Patents
Novel self-energy-taking voltage sensor Download PDFInfo
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- CN212514749U CN212514749U CN202021637238.2U CN202021637238U CN212514749U CN 212514749 U CN212514749 U CN 212514749U CN 202021637238 U CN202021637238 U CN 202021637238U CN 212514749 U CN212514749 U CN 212514749U
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Abstract
The utility model discloses a novel self-energy-taking voltage sensor, which comprises a high-voltage electrode, a primary high-voltage capacitor a, a primary high-voltage capacitor b, a secondary low-voltage capacitor, a transformer, an overvoltage protection circuit a, an overvoltage protection circuit b, an external insulation sleeve and a circuit board base, wherein the primary high-voltage capacitor a and the transformer form an energy-taking circuit, the primary high-voltage capacitor b and the secondary low-voltage capacitor form a sampling circuit, and an energy conditioning module, an energy storage module, a signal acquisition module, a data coding module and a data transmission module are arranged in the circuit board base; the sensor adopts the optical digital signal output to eliminate the problem of easy interference in the transmission of direct output analog signals, adopts a mode of acquiring energy nearby, can effectively eliminate the influence of VFTO on a sampling circuit, further improves the performance of the voltage sensor, has an energy storage function, and can meet the signal output function of the sensor within a certain time under the condition that a circuit is disconnected.
Description
Technical Field
The utility model belongs to the technical field of intelligent power distribution network gets can and signal sensing, concretely relates to novel from getting can voltage sensor.
Background
The intelligent power distribution network is an important component of the intelligent power distribution network, and integrates online data and offline data of the power distribution network, data and user data of the power distribution network, a power grid structure and a geographical graph by using a modern electronic technology, a communication technology, a computer and a network technology, so that the intellectualization of monitoring, protection, control, power utilization and power distribution management under the conditions of normal operation and accidents of the power distribution system is realized, and an advanced sensing measurement technology is one of main technical contents of the intelligent power distribution network. At present, a voltage sensor used in the field of power distribution networks is a device which converts a high-voltage primary signal into a secondary low-voltage signal and transmits the secondary low-voltage signal to a post-stage device in an analog or digital form.
However, the voltage sensor for the distribution network is generally matched and applied to high-voltage switching equipment such as ZW20, ZW32 and the like, and the sensor is easily influenced by a switching action interference signal by adopting an analog electric signal output mode to cause output signal abnormity; the sensor adopts the optical digital signal output mode to eliminate the interference suffered by the transmission process, but needs to additionally provide an auxiliary power supply for the sensor, and when the power supply is far away from the sensor, a sampling circuit is easily influenced by VFTO (very fast transient overvoltage), so that a novel self-energy-taking voltage sensor is provided.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a novel from getting can voltage sensor to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a novel self-energy-taking voltage sensor comprises a high-voltage electrode, a primary high-voltage capacitor a, a primary high-voltage capacitor b, a secondary low-voltage capacitor, an overvoltage protection circuit a, an overvoltage protection circuit b, an outer insulation sleeve and a circuit board base, wherein the first end of the primary high-voltage capacitor a is connected with the high-voltage electrode, the second end of the primary high-voltage capacitor a is connected with the first end of a primary coil on a transformer, the second end of the primary coil is grounded, the overvoltage protection circuit a is connected with the two ends of the primary coil of the transformer, the primary high-voltage capacitor b is connected with the secondary low-voltage capacitor in series, the primary high-voltage capacitor b and the secondary low-voltage capacitor are connected between the high-voltage electrode and the ground, the overvoltage protection circuit b is connected with the two ends of the secondary low-voltage capacitor in parallel, the circuit board base is installed at the, and the transformer is provided with a secondary coil which is electrically connected with the energy conditioning module of the circuit board base through a lead, and voltage signals at two ends of the secondary low-voltage capacitor are output to the signal acquisition module positioned on the circuit board base through the lead.
Furthermore, the outside cover of sensor is equipped with the outer insulation sleeve, and will get can circuit and sample circuit and pass through epoxy or silicon rubber embedment in the outer insulation sleeve.
Furthermore, the energy adjusting module comprises an overvoltage protection circuit, a rectifying and filtering circuit and a pulse width modulation control circuit, the output of the energy taking circuit is connected into the energy adjusting module, the overvoltage protection circuit is connected to release abnormal overvoltage of the transformer, an alternating current signal is converted into a direct current signal through the rectifying and filtering circuit, and the pulse width modulation control circuit is mainly used for outputting voltage meeting set requirements to the energy storage module.
Furthermore, the energy storage module comprises an energy storage circuit and a discharge circuit, the energy storage circuit comprises a current limiting diode, a one-way conduction diode, a voltage stabilizing diode and a super capacitor, the energy storage module divides the voltage input from the energy adjustment module into two paths, one path supplies power to the post-stage circuit through the discharge circuit, the other path charges the super capacitor through the current limiting diode, the voltage stabilizing diode is connected in parallel at two ends of the super capacitor and used for protecting the super capacitor, the one-way conduction diode is connected in parallel with the current limiting diode in an opposite phase mode, and when the energy adjustment module does not output voltage, the electric energy stored in the super capacitor supplies power to the post-stage circuit through the one.
Furthermore, the primary high-voltage capacitor a and the primary high-voltage capacitor b are formed by connecting thin-film capacitors in series.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1. the sensor adopts optical digital signal output to eliminate the problem of easy interference in the transmission of direct output analog signals.
2. The sensor adopts a mode of acquiring energy nearby, so that the influence of VFTO on a sampling circuit can be effectively eliminated, and the performance of the voltage sensor is further improved.
3. The sensor has an energy storage function, and can meet the signal output function of the sensor within a certain time under the condition that a line is disconnected.
4. The sensor integrates two functions, and can effectively reduce the space requirement of accessories on matched switch equipment.
5. The sensor realizes the output of optical digital signals without adding an auxiliary power supply additionally, and has certain cost advantage.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic diagram of the sensor structure of the present invention;
FIG. 2 is a functional block diagram of a sensor according to the present invention;
FIG. 3 is a circuit diagram of a primary body of the present invention;
in the figure: 1. a high voltage electrode; 2. a primary high-voltage capacitor a; 3. a primary high-voltage capacitor b; 4. A secondary low-voltage capacitor; 5. a transformer; 6. an overvoltage protection circuit a; 7. an overvoltage protection circuit b; 8. an outer insulating sleeve; 9. a circuit board base.
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.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Referring to fig. 1-3, the utility model provides a technical scheme: a novel self-energy-taking voltage sensor comprises a primary body, an energy conditioning module, an energy storage module, a signal acquisition module, a data coding module and a data transmission module, wherein the primary body comprises a high-voltage electrode 1, a primary high-voltage capacitor a2, a primary high-voltage capacitor b3, a secondary low-voltage capacitor 4, a transformer 5, an overvoltage protection circuit a6, an overvoltage protection circuit b7, an outer insulating sleeve 8 and a circuit board base 9, a first end of the primary high-voltage capacitor a2 is connected with a high-voltage electrode 1, a second end of the primary high-voltage capacitor a2 is connected with a first end of a primary coil on the transformer 5, a second end of the primary coil is grounded to form an energy taking circuit, the overvoltage protection circuit a6 is connected with two ends of the primary coil in parallel and used for discharging overvoltage, the primary high-voltage capacitor b3 is connected with the secondary low-voltage capacitor 4 in series, the primary high-voltage capacitor b3 and, constitute sampling circuit, and overvoltage protection circuit b7 connects in parallel in the both ends of secondary low voltage electric capacity 4, be used as the overvoltage of releasing, the sensor outside cover is equipped with outer insulating sleeve 8, and will get energy circuit and sampling circuit and pass through epoxy or silicon rubber embedment in outer insulating sleeve 8, and circuit board base 9 is installed to the bottom of sensor, energy conditioning module and signal acquisition module have in the circuit board base 9, secondary coil has on the transformer 5, secondary coil passes through the lead wire and circuit board base 9's energy conditioning module electric connection, secondary low voltage electric capacity 4's both ends voltage signal connects to the signal acquisition module who is located circuit board base 9 through the lead wire output.
In this embodiment, the energy adjusting module further includes an overvoltage protection circuit, a rectifying and filtering circuit, and a pulse width modulation control circuit, the output of the energy obtaining circuit is connected to the energy adjusting module, and is connected to the overvoltage protection circuit to release the abnormal overvoltage of the transformer 5, and the rectifying and filtering circuit converts the ac signal into the dc signal, and the pulse width modulation control circuit is mainly used to output the voltage meeting the setting requirement to the energy storage module.
In this embodiment, further, the energy storage module includes an energy storage circuit and a discharge circuit, the energy storage circuit includes a current limiting diode, a unidirectional conducting diode, a zener diode, and a super capacitor, the energy storage module divides the voltage input from the energy adjustment module into two paths, one of the two paths supplies power to the subsequent circuit through the discharge circuit, the other path charges the super capacitor through the current limiting diode, the zener diode is connected in parallel to two ends of the super capacitor for protecting the super capacitor, the unidirectional conducting diode is connected in parallel with the current limiting diode in an inverted manner, and when the energy adjustment module does not output voltage, the electric energy stored in the super capacitor supplies power to the subsequent circuit through the unidirectional conducting diode.
In this embodiment, the data encoding module may be a single chip or an FPGA, and completes data encoding according to a predetermined communication protocol, and then sends the encoded electrical digital signal to the data sending module
In this embodiment, the data sending module further includes a circuit adjusting circuit and an electrical-to-optical conversion module, and the voltage adjusting circuit adjusts the electrical digital signal output by the data encoding module to an electrical digital signal meeting the requirement of the electrical-to-optical conversion module.
The utility model discloses a theory of operation and use flow: the sensor is composed of a high-voltage electrode 1, an outer insulation sleeve 8 and a circuit board base 9, an energy taking circuit and a sampling circuit are encapsulated in the outer insulation sleeve 8 through epoxy resin or silicon rubber to form a primary body of the sensor, an electro-optical conversion module converts an electrical digital signal into an optical digital signal and transmits the optical digital signal to a rear-stage device through an optical fiber, the sensor can realize an energy transmission function besides a signal sensing function through the primary body, on one hand, the sensor can supply energy for secondary sensing signals in a digital mode and eliminate the problem that the direct output analog signal transmission is easy to interfere; on the other hand, a mode of obtaining energy nearby is adopted, the power supply and the electric equipment are located at the same ground potential, the influence of VFTO on the sampling circuit can be effectively eliminated, and the voltage is further improved.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (5)
1. The utility model provides a novel get can voltage sensor certainly which characterized in that: the high-voltage transformer comprises a high-voltage electrode (1), a primary high-voltage capacitor a (2), a primary high-voltage capacitor b (3), a secondary low-voltage capacitor (4), a transformer (5), an overvoltage protection circuit a (6), an overvoltage protection circuit b (7), an outer insulation sleeve (8) and a circuit board base (9), wherein one end of the primary high-voltage capacitor a (2) is connected with the high-voltage electrode (1), the other end of the primary high-voltage capacitor a is connected with one end of a primary coil of the transformer (5), the other end of the primary coil of the transformer (5) is grounded, the overvoltage protection circuit a (6) is connected with two ends of the primary coil of the transformer (5) in parallel, the primary high-voltage capacitor b (3) and the secondary low-voltage capacitor (4) are connected in series, the primary high-voltage capacitor b (3) and the secondary low-voltage capacitor (4) are connected between the high-voltage electrode (, circuit board base (9) are installed to the bottom of sensor, energy conditioning module and signal acquisition module have in circuit board base (9), secondary coil has on transformer (5), and secondary coil passes through the energy conditioning module electric connection of lead wire and circuit board base (9), the both ends voltage signal of secondary low pressure electric capacity (4) connects to being located through the lead wire output on the signal acquisition module of circuit board base (9).
2. The novel self-powered voltage sensor of claim 1, wherein: the outside cover of sensor is equipped with outer insulation sleeve pipe (8), and will get can circuit and sampling circuit and pass through epoxy or silicon rubber embedment in outer insulation sleeve pipe (8).
3. The novel self-powered voltage sensor of claim 1, wherein: the energy adjusting module comprises an overvoltage protection circuit, a rectifying and filtering circuit and a pulse width modulation control circuit, the output of the energy taking circuit is connected into the energy adjusting module, the overvoltage protection circuit is connected in the energy taking circuit and used for releasing abnormal overvoltage of the transformer (5), an alternating current signal is converted into a direct current signal through the rectifying and filtering circuit, and the pulse width modulation control circuit is mainly used for outputting voltage meeting set requirements to the energy storage module.
4. The novel self-powered voltage sensor of claim 3, wherein: the energy storage module comprises an energy storage circuit and a discharge circuit, the energy storage circuit comprises a current limiting diode, a one-way conduction diode, a voltage stabilizing diode and a super capacitor, the energy storage module divides the voltage input from the energy adjustment module into two paths, one path supplies power to a rear-stage circuit through the discharge circuit, the other path charges the super capacitor through the current limiting diode, the voltage stabilizing diode is connected in parallel at two ends of the super capacitor and used for protecting the super capacitor, the one-way conduction diode is connected in parallel with the current limiting diode in an opposite phase mode, and when the energy adjustment module does not output voltage, the electric energy stored in the super capacitor supplies power to the rear-stage circuit through.
5. The novel self-powered voltage sensor of claim 1, wherein: and the primary high-voltage capacitor a (2) and the primary high-voltage capacitor b (3) are formed by connecting thin-film capacitors in series.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021637238.2U CN212514749U (en) | 2020-08-07 | 2020-08-07 | Novel self-energy-taking voltage sensor |
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| CN202021637238.2U CN212514749U (en) | 2020-08-07 | 2020-08-07 | Novel self-energy-taking voltage sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112816753A (en) * | 2020-08-07 | 2021-05-18 | 苏州市清易传感电力电子有限公司 | Novel self-energy-taking voltage sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112816753A (en) * | 2020-08-07 | 2021-05-18 | 苏州市清易传感电力电子有限公司 | Novel self-energy-taking voltage sensor |
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