CN112540214A - Self-energy-taking and measurement integrated circulation monitoring device and circulation monitoring method - Google Patents
Self-energy-taking and measurement integrated circulation monitoring device and circulation monitoring method Download PDFInfo
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- CN112540214A CN112540214A CN202011504917.7A CN202011504917A CN112540214A CN 112540214 A CN112540214 A CN 112540214A CN 202011504917 A CN202011504917 A CN 202011504917A CN 112540214 A CN112540214 A CN 112540214A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a circulation monitoring device and method integrating self energy taking and measurement, wherein the monitoring device comprises: the switching type power supply comprises an open-close type current transformer, a switching module, a power frequency measuring module, an induction power supply module, a communication module and a main control module, wherein the open-close type current transformer is used for being sleeved on a grounding wire; the switching module is provided with a switching input end connected with the output end of the current transformer, two switching output ends respectively connected with the input end of the frequency measurement circuit and the input end of the induction power supply circuit, and a switching connecting part used for connecting the switching input ends and one of the switching input ends; the induction power supply module is used for supplying power; according to the circulating current monitoring device and the circulating current monitoring method, the energy taking module and the measuring module are the same module, energy taking and measuring are switched through the switching module, the structure is simple, the cost is low, wiring is not needed on site, the site installation and maintenance are convenient, and the installation efficiency is high; and the scheme adopts clearance work, not only meets the requirement of circulation monitoring work, but also has lower energy consumption.
Description
Technical Field
The invention relates to the technical field of circulation monitoring, in particular to a circulation monitoring device and a circulation monitoring method integrating self-energy taking and measurement.
Background
The grounding circulation monitoring is used for monitoring the sheath grounding circulation slow-changing numerical value, reflecting the conditions of the sheath grounding good degree, the cable aging degree, the core load size change and the like, and is an effective means reliably used for monitoring the grounding insulation state of the cable; in the current circulation monitoring technology, a circulation collection system generally consists of relatively independent modules or units such as a circulation sensor, a power supply, a collector, a communication module and the like; the circulating current sensor is generally arranged on a grounding wire of a high-voltage cable, and converts a power frequency grounding current signal into a small current signal corresponding to the power frequency grounding current signal through an electromagnetic induction technology; the power supply is used for providing a stable and reliable working power supply for the collector, and the power supply mode generally comprises an alternating current power supply, a direct power supply, a CT application power supply, a solar power supply and the like; the collector performs analog/digital conversion on the small current signal obtained by converting the loop current sensor, and uploads the small current signal to platform software for display through wired or wireless communication after filtering processing.
The current circulation monitoring technology has the following problems: 1. the circulation sensor is connected with the collector in a wired manner, so that the workload of wiring in a small field space is increased, and the later-stage product maintenance is not facilitated; 2. the power supply is an independent device, is in wired connection with the collector, has a complex structure, and further increases the wiring workload on site; 3. some application sites can not provide a stable power supply or can only supply power through a battery, and a challenge is faced on how to ensure the reliable and long-time operation of the system; there is therefore a need to find a solution to such problems.
Disclosure of Invention
In view of the above, there is a need to overcome at least one of the above-mentioned deficiencies in the prior art, and the present invention provides a self-powered and integrated measurement and circulation monitoring apparatus, comprising: an open-close type current transformer, a switching module, a power frequency measuring module, an induction power supply module, a communication module and a main control module,
the open-close type current transformer is sleeved on the grounding wire; the switching module, the power frequency measuring module, the induction power supply module, the communication module and the main control module form a control circuit module of the circulation monitoring device, the circulation monitoring device further comprises a control circuit accommodating cavity for accommodating the control circuit module, the control circuit accommodating cavity is fixed on the open-close type current transformer, and the switching module is provided with a switching input end connected with the output end of the current transformer, two switching output ends respectively connected with the input end of the frequency measuring circuit and the input end of the induction power supply circuit, and a switching connecting part for connecting the switching input end and one of the switching input ends; the output end of the induction power supply module is respectively connected with the switching module, the power frequency measuring module, the induction power supply module, the communication module and the main control module; the main control module is respectively connected with the switching module, the power frequency measuring module, the induction power supply module and the communication module.
As described in the background of the patent for the prior art, the current circulation monitoring technology has the following problems: the wiring is complex, the structure is complex, and the reliability and long-time operation of the system cannot be ensured; the open-close type current transformer is used as an induction power-taking transformer for obtaining current energy in a primary side cable in a magnetic induction mode, and is also used as a measuring current transformer for measuring the current in the primary side cable accurately; in the case, the energy taking and measuring module is the same module, and the switching between energy taking and measuring is performed through the switching module, so that the structure is simple, the cost is low, the integrated design of the circulation monitoring equipment is realized, no wiring is needed on the site, the site installation and maintenance are convenient, the installation efficiency is high, the circulation monitoring equipment is suitable for mass production and is easy to popularize; and the scheme adopts clearance work, not only meets the requirement of circulation monitoring work, but also has lower energy consumption.
In addition, the circulation monitoring device integrating self-energy taking and measurement disclosed by the invention also has the following additional technical characteristics:
further, the main control module comprises a low power consumption MCU (single chip microcomputer) and a timer.
Further, the induction power supply module comprises a front-end protection bleeder circuit, a rectification filter circuit, a micro-energy collection voltage stabilizing circuit, an energy storage part and a monitoring circuit, wherein the input end of the front-end protection bleeder circuit is connected with one switching output end, the input end of the rectification filter circuit is connected with the output end of the front-end protection bleeder circuit, the input end of the micro-energy collection voltage stabilizing circuit is connected with the output end of the rectification filter circuit, the input end of the energy storage part is connected with the output end of the micro-energy collection voltage stabilizing circuit, the input end of the monitoring circuit is connected with the output end of the micro, the output end of the energy storage part is respectively connected with the switching module, the power frequency measuring module, the induction power supply module, the communication module and the main control module, the monitoring circuit is used for feeding back the output current value of the micro-energy collecting voltage stabilizing circuit to the front-end protection bleeder circuit, so that the front-end protection bleeder circuit carries out current bleeder according to the output current value.
Furthermore, the energy storage part comprises an energy storage unit and a standby power supply, and the energy storage unit and the standby power supply are connected in parallel through a diode.
The energy storage unit and the standby power supply are connected in parallel through the diode, the energy storage unit is guaranteed to be preferentially used for supplying power to the acquisition circuit and the wireless communication circuit, and the standby power supply is used for supplying power when no current or too small current (insufficient electric quantity of the energy storage unit) is measured at one time.
Furthermore, the energy storage unit is a super capacitor, and the standby power supply is a lithium-ion battery.
Furthermore, the power frequency measurement module comprises a front-end impact protection circuit with an input end connected with the other switching output end of the switching module, a rectification circuit with an input end connected with an output end of the front-end impact protection circuit and used for converting the measurement current signal sent by the open-close type current transformer into an effective value signal, and a filtering and amplifying circuit with an input end connected with an output end of the rectification and filtering circuit and an output end connected with the main control module and used for filtering high-frequency harmonic interference on the circuit.
Furthermore, the communication module is a wireless communication module, and according to actual needs, the wireless communication module may be a low power consumption communication mode such as near field communication (BLE, ZIGBEE) or the like, or a long distance communication mode (NB-IoT, GPRS) or the like, and has an internal antenna.
Further, the switching module is a double-pole double-throw relay.
Further, the main control module is connected with the switching module through a photoelectric coupler.
In order to reduce the influence of the switching module on the main control module, the main control module is isolated from the switching module through a photoelectric coupler.
According to another aspect of the present invention, there is also provided a circulation monitoring method based on the above-mentioned circulation monitoring device integrating self-energy collection and measurement, including the following steps:
the main control module controls the switching module to connect the open-close type current transformer with the induction power supply module or the power frequency measurement module according to preset cycle information, wherein the cycle information comprises an acquisition cycle, a charging cycle and a reporting cycle; when the current transformer is in a charging cycle, the main control module controls the switching module to enable the open-close type current transformer to charge the induction power supply module; when the current transformer is in an acquisition period, the main control module controls the switching module to enable the open-close type current transformer to send a measurement current signal to the power frequency measurement module, the power frequency measurement module carries out rectification filtering on the measurement current signal to obtain a measurement signal and sends the measurement signal to the main control module, and the main control module analyzes the measurement signal and stores an analysis result; when the reporting period is reached, the main control module sends all the stored analysis results to be reported to an acquisition terminal through the communication module, and then the switching module is controlled to enable the open-close type current transformer to charge the induction power supply module.
In addition, the circulation monitoring method disclosed by the invention also has the following additional technical characteristics:
further, the main control module judges whether the analysis result is larger than a preset threshold value, when the analysis result is larger than the preset threshold value, the analysis result is further sent to an acquisition terminal as an abnormal result through the communication module, and when the analysis result is smaller than the preset threshold value, the measurement signal is further stored.
Further, the main control module judges whether the reporting frequency of the abnormal result in the preset time exceeds a preset reporting frequency, and when the judgment is exceeded, the reporting period is further adjusted according to the reporting frequency of the abnormal result.
The scheme adopts an intelligent gap working mode, can adjust the frequency of data reporting according to the size of the measured grounding current, and improves the long-term performance of the system.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural view of a circulation monitoring device with integrated self-energy extraction and measurement in accordance with an embodiment of the present invention;
FIG. 2 is a schematic block diagram of a self-energizing and measurement integrated circulation monitoring device in one embodiment of the invention;
FIG. 3 is a functional block diagram of a self-energizing and measurement integrated switching module in accordance with an embodiment of the present invention;
FIG. 4 is a functional block diagram of an inductive power supply module in accordance with an embodiment of the present invention; and
fig. 5 is a schematic block diagram of a power frequency measurement module according to an embodiment of the invention.
The current transformer comprises an open-close type current transformer 1, a control circuit module 2, a switching module 21, a power frequency measurement module 22, a front-end impact protection circuit 221, a rectification circuit 222, a filtering amplification circuit 223, an induction power supply module 23, a front-end protection bleeder circuit 231, a rectification filter circuit 232, a micro-energy collection voltage stabilizing circuit 233, an energy storage portion 234, a monitoring circuit 235, a communication module 24 and a main control module 25.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout; the embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "lateral", "vertical", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, are used only for convenience in describing the present invention and for simplification of description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
The invention has the following conception that the invention provides a circulation monitoring device and a circulation monitoring method integrating self-energy taking and measurement, wherein an open-close type current transformer is used as an induction electricity taking transformer for obtaining current energy in a primary side cable in a magnetic induction mode and also used as a measurement current transformer for measuring the current in the primary side cable with precision; in the case, the energy taking and measuring module is the same module, and the switching between energy taking and measuring is performed through the switching module, so that the structure is simple, the cost is low, the integrated design of the circulation monitoring equipment is realized, no wiring is needed on the site, the site installation and maintenance are convenient, the installation efficiency is high, the circulation monitoring equipment is suitable for mass production and is easy to popularize; and the scheme adopts clearance work, not only meets the requirement of circulation monitoring work, but also has lower energy consumption.
The self-energizing and measuring integrated circulation monitoring device of the present invention will be described with reference to the accompanying drawings, fig. 1 is a schematic structural view of the self-energizing and measuring integrated circulation monitoring device in one embodiment of the present invention; FIG. 2 is a schematic block diagram of a self-energizing and measurement integrated circulation monitoring device in one embodiment of the invention; FIG. 3 is a functional block diagram of a self-energizing and measurement integrated switching module in accordance with an embodiment of the present invention; FIG. 4 is a functional block diagram of an inductive power supply module in accordance with an embodiment of the present invention; and fig. 5 is a schematic block diagram of a power frequency measurement module in an embodiment of the invention.
As shown in fig. 1 to 3, according to an embodiment of the present invention, a circulation monitoring device integrating self-energy extraction and measurement includes: an open-close type current transformer 1, a switching module 21, a power frequency measuring module 22, an induction power supply module 23, a communication module 24 and a main control module 25,
the open-close type current transformer 1 is used for being sleeved on the grounding wire; the switching module 21, the power frequency measuring module 22, the induction power supply module 23, the communication module 24 and the main control module 25 form a control circuit module 2 of the circulation monitoring device, the circulation monitoring device further comprises a control circuit accommodating cavity for accommodating the control circuit module 2, the control circuit accommodating cavity is fixed on the open-close type current transformer 1, the switching module 21 is provided with a switching input end connected with an output end of the current transformer, two switching output ends respectively connected with an input end of the frequency measuring circuit and an input end of the induction power supply circuit, and a switching connecting part for connecting the switching input end and one of the switching input ends; the output end of the induction power supply module 23 is connected with the switching module 21, the power frequency measurement module 22, the induction power supply module 23, the communication module 24 and the main control module 25 respectively; the main control module 25 is respectively connected to the switching module 21, the power frequency measurement module 22, the inductive power supply module 23, and the communication module 24, as shown in fig. 2, a dashed arrow indicates signal flow, and a solid arrow indicates supply current.
As described in the background of the patent for the prior art, the current circulation monitoring technology has the following problems: the wiring is complex, the structure is complex, and the reliability and long-time operation of the system cannot be ensured; the open-close type current transformer 1 is used as an induction power-taking transformer for obtaining current energy in a primary side cable in a magnetic induction mode and is also used as a measuring current transformer for measuring the current in the primary side cable accurately; in practical use, the default open-close type current transformer 1 is connected with the induction power supply module 23, at the moment, the energy storage part 234 is charged, when a set acquisition period comes, the timer wakes up the MCU in the main control module 25, the MCU connects the open-close type current transformer 1 with the power frequency measurement module 22 through the control switching module 21 and analyzes a measurement signal of the power frequency measurement module 22 to obtain an analysis result, and further completes precision sampling analysis of data; and the scheme adopts clearance work, not only meets the requirement of circulation monitoring work, but also has lower energy consumption.
In addition, the circulation monitoring device integrating self-energy taking and measurement disclosed by the invention also has the following additional technical characteristics:
according to an embodiment of the present invention, the main control module 25 includes an MCU (single chip microcomputer) and a timer.
According to some embodiments of the present invention, the induction power module 23 includes a front-end protection bleeder circuit 231 having an input end connected to one of the switching output ends, a rectification filter circuit 232 having an input end connected to an output end of the front-end protection bleeder circuit 231, a micro-energy collection voltage stabilizing circuit 233 having an input end connected to an output end of the rectification filter circuit 232, an energy storage portion 234 having an input end connected to an output end of the micro-energy collection voltage stabilizing circuit 233, and a monitoring circuit 235 having an input end connected to an output end of the micro-energy collection voltage stabilizing circuit 233 and an output end connected to the front-end protection bleeder circuit 231, wherein the output end of the energy storage portion 234 is respectively connected to the switching module 21, the power frequency measurement module 22, the induction power module 23, the communication module 24, and the main control module 25, and the monitoring circuit 235 is configured to feed an output current value of the micro-energy collection voltage stabilizing circuit 233 back to the front-end protection The front-end protection leakage circuit 231 performs current leakage according to the output current value, thereby ensuring that energy leakage can be performed to the outside in real time when the primary side current is large.
As shown in fig. 4, the rectifying and filtering circuit 232 performs rectifying and filtering processing on the energy transmitted from the open-close type current transformer 1, and the micro-energy collecting and stabilizing circuit 233 performs processing and stores the energy through the energy storage part 234, and the induction power supply module 23 further includes a front-end protection and leakage circuit 231, which can immediately perform energy leakage when the primary side current is large or the voltage of the energy storage part 234 is full.
According to some embodiments of the present invention, the energy storage part 234 includes an energy storage unit and a backup power source, and the energy storage unit and the backup power source are connected in parallel through a diode.
The energy storage unit and the standby power supply are connected in parallel through the diode, when current exists on the grounding cable, the micro-energy collecting voltage stabilizing circuit charges the energy storage unit firstly, the energy storage unit is guaranteed to be preferentially used for supplying power to the acquisition circuit and the wireless communication circuit, and when no current or too small current (insufficient electric quantity of the energy storage unit) is measured at one time, the standby power supply is used for supplying power.
According to some embodiments of the invention, the energy storage unit is a super capacitor and the backup power source is a lithium sub-ion battery.
As shown in fig. 5, according to some embodiments of the present invention, the power frequency measurement module 22 includes a front-end impact protection circuit 221 whose input end is connected to another switching output end of the switching module 21, a rectification circuit 222 whose input end is connected to an output end of the front-end impact protection circuit 221 for converting a measurement current signal sent by the open-close type current transformer 1 into an effective value signal, and a filtering and amplifying circuit 223 whose input end is connected to an output end of the rectification and filtering circuit 232 and output end is connected to the main control module 25 for filtering high-frequency harmonic interference on the circuit.
According to some embodiments of the present invention, the communication module 24 is a wireless communication module, and the wireless communication module may be a low power consumption communication mode such as near field communication (BLE, ZIGBEE) or a long distance communication mode (NB-IoT, GPRS), and the like, and has an internal antenna according to actual requirements.
According to one embodiment of the invention, the switching module 21 is a double pole double throw relay.
According to an embodiment of the present invention, the main control module 25 is connected to the switching module 21 through a photo coupler.
According to another aspect of the present invention, there is also provided a circulation monitoring method based on the above-mentioned circulation monitoring device integrating self-energy collection and measurement, including the following steps:
the main control module 25 controls the switching module 21 to connect the open-close type current transformer 1 with the induction power supply module 23 or the power frequency measurement module 22 according to preset cycle information, wherein the cycle information comprises an acquisition cycle, a charging cycle and a reporting cycle; when the current transformer is in a charging cycle, the main control module 25 controls the switching module 21 to enable the open-close type current transformer 1 to charge the induction power supply module 23; when the current transformer is in an acquisition cycle, the main control module 25 controls the switching module 21 to enable the open-close type current transformer 1 to send a measurement current signal to the power frequency measurement module 22, the power frequency measurement module 22 rectifies and filters the measurement current signal to obtain a measurement signal and sends the measurement signal to the main control module 25, and the main control module 25 analyzes the measurement signal and stores an analysis result; when the reporting period is reached, the main control module 25 sends all the stored analysis results to be reported to an acquisition terminal through the communication module 24, and then the switching module 21 is controlled to enable the open-close type current transformer 1 to charge the induction power supply module 23.
In addition, the circulation monitoring method disclosed by the invention also has the following additional technical characteristics:
according to some embodiments of the present invention, the main control module 25 determines whether the analysis result is greater than a preset threshold, and further sends the analysis result as an abnormal result to the acquisition terminal through the communication module 24 when the analysis result is greater than the preset threshold, and further stores the measurement signal when the analysis result is less than the preset threshold.
According to some embodiments of the present invention, the main control module 25 determines whether the reporting frequency of the abnormal result exceeds a preset reporting frequency within a predetermined time, and when the determining exceeds the preset reporting frequency, the reporting period is further adjusted according to the reporting frequency of the abnormal result.
The scheme adopts an intelligent gap working mode, can adjust the frequency of data reporting according to the size of the measured grounding current, and improves the long-term performance of the system.
Any reference to "one embodiment," "an embodiment," "example embodiment," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. This schematic representation in various places throughout this specification does not necessarily refer to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the purview of one skilled in the art to effect such feature, structure, or characteristic in connection with other ones of the embodiments.
While specific embodiments of the invention have been described in detail with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this invention; in particular, reasonable variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the foregoing disclosure, the drawings and the appended claims without departing from the spirit of the invention; except variations and modifications in the component parts and/or arrangements, the scope of which is defined by the appended claims and equivalents thereof.
Claims (10)
1. A self-energized and measurement integrated circulation monitoring device, comprising: an open-close type current transformer, a switching module, a power frequency measuring module, an induction power supply module, a communication module and a main control module,
the open-close type current transformer is sleeved on the grounding wire; the switching module, the power frequency measuring module, the induction power supply module, the communication module and the main control module form a control circuit module, the circulation monitoring device further comprises a control circuit accommodating cavity for accommodating the control circuit module, the control circuit accommodating cavity is fixed on the open-close type current transformer, and the switching module is provided with a switching input end connected with the output end of the current transformer, two switching output ends respectively connected with the input end of the frequency measuring circuit and the input end of the induction power supply circuit, and a switching connecting part for connecting the switching input end and one of the switching input ends; the output end of the induction power supply module is respectively connected with the switching module, the power frequency measuring module, the induction power supply module, the communication module and the main control module; the main control module is respectively connected with the switching module, the power frequency measuring module, the induction power supply module and the communication module.
2. The apparatus according to claim 1, wherein the inductive power supply module comprises a front-end protection bleeder circuit having an input terminal connected to one of the switching output terminals, a rectification filter circuit having an input terminal connected to an output terminal of the front-end protection bleeder circuit, a micro-energy collection voltage regulator circuit having an input terminal connected to an output terminal of the rectification filter circuit, an energy storage unit having an input terminal connected to an output terminal of the micro-energy collection voltage regulator circuit, and a monitoring circuit having an input terminal connected to an output terminal of the micro-energy collection voltage regulator circuit and an output terminal connected to the front-end protection bleeder circuit, wherein the output terminal of the energy storage unit is connected to the switching module, the power frequency measurement module, the inductive power supply module, the communication module, and the main control module, and the monitoring circuit is configured to feed back an output current value of the micro-energy collection voltage regulator circuit to the front-end protection bleeder circuit The discharge circuit enables the front end protection bleeder circuit to carry out current bleeder according to the output current value.
3. The device for monitoring circulation currents with self energy collection and measurement as one body according to claim 2, wherein the energy storage portion comprises an energy storage unit and a backup power source, and the energy storage unit and the backup power source are connected in parallel through a diode.
4. The device for monitoring circulation current with integrated self-energy-taking and measurement as claimed in claim 1, wherein the power frequency measurement module comprises a front-end impact protection circuit with an input end connected with another switching output end of the switching module, a rectification circuit with an input end connected with an output end of the front-end impact protection circuit, and a filter amplification circuit with an input end connected with an output end of the rectification filter circuit and an output end connected with the main control module.
5. A self-energizing and measuring integrated circulation monitoring device according to claim 1, wherein the communication module is a wireless communication module.
6. A self-energizing and measuring integrated circulation monitoring device according to claim 1, wherein the switching module is a double pole double throw relay.
7. A self-energized and measurement integrated circulation monitoring device according to claim 1, wherein the master control module is connected to the switching module through an opto-coupler.
8. A circulation monitoring method based on a circulation monitoring device integrating energy taking and measurement as claimed in any one of claims 1 to 7, characterized by comprising the following steps:
the main control module controls the switching module to connect the open-close type current transformer with the induction power supply module or the power frequency measurement module according to preset cycle information, wherein the cycle information comprises an acquisition cycle, a charging cycle and a reporting cycle; when the current transformer is in a charging cycle, the main control module controls the switching module to enable the open-close type current transformer to charge the induction power supply module; when the current transformer is in an acquisition period, the main control module controls the switching module to enable the open-close type current transformer to send a measurement current signal to the power frequency measurement module, the power frequency measurement module carries out rectification filtering on the measurement current signal to obtain a measurement signal and sends the measurement signal to the main control module, and the main control module analyzes the measurement signal and stores an analysis result; and when the reporting period is reached, the main control module sends all the stored analysis results to be reported to the acquisition terminal through the communication module.
9. The method according to claim 8, wherein the main control module determines whether the analysis result is greater than a preset threshold, and further sends the analysis result as an abnormal result to an acquisition terminal through the communication module when the analysis result is greater than the preset threshold, and further stores the measurement signal when the analysis result is less than the preset threshold.
10. The method according to claim 9, wherein the main control module determines whether the number of reporting abnormal results in a predetermined time exceeds a preset number of reporting times, and when the determination exceeds the preset number, the reporting period is further adjusted according to the number of reporting abnormal results.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011504917.7A CN112540214A (en) | 2020-12-18 | 2020-12-18 | Self-energy-taking and measurement integrated circulation monitoring device and circulation monitoring method |
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| CN202011504917.7A CN112540214A (en) | 2020-12-18 | 2020-12-18 | Self-energy-taking and measurement integrated circulation monitoring device and circulation monitoring method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113848386A (en) * | 2021-10-14 | 2021-12-28 | 中国南方电网有限责任公司超高压输电公司广州局 | Voltammeter and voltammeter control method |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113848386A (en) * | 2021-10-14 | 2021-12-28 | 中国南方电网有限责任公司超高压输电公司广州局 | Voltammeter and voltammeter control method |
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