CN112345927A - Monitoring system and intelligent fuse of fuse - Google Patents
Monitoring system and intelligent fuse of fuse Download PDFInfo
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- CN112345927A CN112345927A CN202010844636.XA CN202010844636A CN112345927A CN 112345927 A CN112345927 A CN 112345927A CN 202010844636 A CN202010844636 A CN 202010844636A CN 112345927 A CN112345927 A CN 112345927A
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- fuse
- electric field
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- module
- intelligent monitoring
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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
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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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
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
Abstract
The invention discloses a monitoring system of a fuse and an intelligent fuse, wherein the system comprises: the intelligent monitoring base is arranged at the bottom of the fuse, the CT ring is sleeved at the lower lead of the fuse, and the management terminal is arranged on the CT ring; wherein, include in the intelligent monitoring base: the PCB comprises a PCB, a circuit element welded on the PCB, and a pair of copper foils paved on the upper surface and the lower surface of the PCB; the CT loop includes a current measurement sensor; the circuit element welded on the PCB board comprises: the device comprises an electric field measuring module, a first amplifier, an MCU, a second amplifier and a wireless module; and the management terminal judges whether the fuse of the fuse is fused or the line has power failure according to the current value and the electric field value reported by the MCU. The invention can monitor the fuse state of the fuse, and can monitor the current and electric field value of the line and judge whether other conditions exist, such as power failure and the like.
Description
Technical Field
The invention relates to the technical field of power grid monitoring, in particular to a monitoring system of a fuse and an intelligent fuse.
Background
The fuse is widely used in distribution network lines in China, the principle of the fuse is mainly that the fuse with different amounts of current is selected to limit the line current, when a large-current fault occurs, the current exceeds the rated current of the fuse, the fuse body is fused to form an electric arc, then the electric arc gasifies special materials in an arc extinguishing pipe to generate a large amount of gas under the action of high temperature, then the electric arc is blown out by the gas when the current crosses zero, the fuse carrying pipe is pushed out of the fuse body under the action of a spring to form an electric port, the fault is cut off, and the protection of the distribution network lines is realized. The current problems are that the running state of the fuse and the running state of a line are difficult to be judged accurately, and the fault is difficult to be positioned.
At present, a plurality of fuse tube state monitoring methods exist, such as a method of monitoring by using a gravity sensing method and a method of monitoring by using a displacement sensor. The monitoring method using the gravity sensing mode comprises the steps that when a fuse carrier tube of the fuse is popped up, the gravity sensing detection circuit detects that the fuse carrier tube falls, the trigger circuit wakes up the single chip microcomputer when the fuse carrier tube falls, the single chip microcomputer processes collected state data information after being awakened, and the fuse wire is determined to be fused. However, in this method, a sensor needs to be additionally installed on the fuse base by punching, which complicates the structure, affects the appearance, and is not easy to install.
The method for monitoring by using the displacement sensor comprises the steps that a position monitoring component is arranged on a fuse body, the position of the monitoring component corresponds to the position of a fuse carrying tube on the fuse body, and the monitoring component judges the on-off state of a fuse wire according to the change of the position of the fuse carrying tube. However, the method can only monitor the fuse state of the fuse, but it cannot be determined whether other states exist in the distribution network line, such as power failure.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a fuse monitoring system and an intelligent fuse, which have simple structures, do not affect the appearance, are easy to install, and can monitor not only the fuse state of the fuse, but also the current and electric field values of the line and determine whether other conditions, such as power failure, exist.
In view of the above object, the present invention provides a monitoring system for a fuse, which is used for monitoring a fuse disposed on a three-phase line, the system comprising:
the intelligent monitoring base is arranged at the bottom of the fuse, the CT ring is sleeved at the lower lead of the fuse, and the management terminal is arranged on the CT ring; wherein, include in the intelligent monitoring base: the PCB comprises a PCB, a circuit element welded on the PCB, and a pair of copper foils paved on the upper surface and the lower surface of the PCB; the CT loop includes a current measurement sensor; the circuit element welded on the PCB board comprises: the device comprises an electric field measuring module, a first amplifier, an MCU, a second amplifier and a wireless module;
the electric field measurement module is used for measuring the potential difference formed by the copper foil and outputting the measured electric field value to a first amplifier; the signal amplified by the first amplifier is input to the MCU;
the current measuring sensor is used for measuring the current of a line where the fuse is located and outputting the measured current value to the second amplifier; the signal amplified by the second amplifier is input to the MCU;
the MCU reports the measured current value and the electric field value to the management terminal through the wireless module; and the management terminal judges that the fuse wire of the fuse is fused or the line where the fuse is positioned has a power failure fault according to the reported current value and the electric field value.
Preferably, the management terminal is specifically configured to determine that the fuse in the fuse of the phase line is blown and the fuse carrier pops out if the current value reported by the intelligent monitoring base of the fuse of the phase line in the three-phase line is lower than the set current threshold, the electric field value is not lower than the set electric field threshold, the current reported electric field value is lower than the electric field value reported before by an amount larger than the set amplitude threshold, and the current values and the electric field values reported by the intelligent monitoring bases of the other two fuses are normal; if the current values reported by the intelligent monitoring bases of the three fuses of the three-phase line are all lower than the set current threshold value, the electric field values are all lower than the set electric field threshold value, and the descending amplitudes of the current reported electric field values compared with the electric field values reported before are all larger than the set amplitude threshold value, the three-phase line is judged to have power failure.
Preferably, the CT ring further comprises: an induction electricity-taking sensor; the circuit element soldered on the PCB further comprises: a boost module;
the induction electricity taking sensor takes electricity from the alternating electric field and outputs the electricity, and the electricity is boosted by the boosting module; the boosting module outputs boosted voltage to supply power for each circuit element in the intelligent monitoring base.
Alternatively, the CT ring further comprises: an induction electricity-taking sensor; the circuit element soldered on the PCB further comprises: the charging management module comprises a super capacitor, a diode D1, a boosting module, a diode D2 and a charging management module;
the induction electricity taking sensor charges the super capacitor through the charging management module;
the anode of the diode D1 is connected with the output of the induction electricity-taking sensor, and the cathode of the diode D1 is connected with the input of the boosting module;
the anode of the diode D2 is connected with the voltage output end of the super capacitor, and the cathode of the diode D2 is connected with the input of the boosting module;
the output of the boosting module is connected with power lines of all circuit elements in the intelligent monitoring base to supply power to all circuit elements.
Alternatively, the CT ring further comprises: an induction electricity-taking sensor; the circuit element soldered on the PCB further comprises: the charging management module comprises a super capacitor, a diode D1, a boosting module, a diode D2 and a charging management module;
the induction electricity taking sensor charges the super capacitor through the charging management module;
the anode of the diode D1 is connected with the output of the induction electricity-taking sensor, and the cathode of the diode D1 is connected with the input of the boosting module;
the anode of the diode D2 is connected with the voltage output end of the super capacitor, and the cathode of the diode D2 is connected with the input of the boosting module;
the output of the boosting module is connected with power lines of all circuit elements in the intelligent monitoring base to supply power to all circuit elements.
Preferably, the outputs of the induction electricity-taking sensor, the super capacitor and the standby battery are all connected with the MCU; and
the MCU is also used for periodically reporting the acquired output voltages of the induction electricity-taking sensor, the super capacitor and the standby battery to the management terminal through the wireless module.
Preferably, the management terminal is further configured to determine that a low power event occurs in the intelligent monitoring base after confirming that the output voltages of the induction power sensor, the super capacitor, and the backup battery reported by the intelligent monitoring base are all lower than a set voltage threshold.
Preferably, the management terminal is further configured to determine that a communication fault occurs in the intelligent monitoring base if data reported by the intelligent monitoring base is not received in three consecutive periods and no low-power event exists.
Further, the system further comprises: a system master station;
and the management terminal is also used for uploading a judgment result made according to the data reported by the intelligent monitoring base to the system main station.
The present invention also provides an intelligent fuse comprising: fuse body and, as in the system described above, intelligent monitoring base and CT ring.
The monitoring system of the fuse protector comprises an intelligent monitoring base arranged at the bottom of the fuse protector, a CT ring sleeved at a down-lead of the fuse protector and a management terminal; wherein, include in the intelligent monitoring base: the PCB comprises a PCB, a circuit element welded on the PCB, and a pair of copper foils paved on the upper surface and the lower surface of the PCB; the CT loop includes a current measurement sensor; the circuit element welded on the PCB board comprises: the device comprises an electric field measuring module, a first amplifier, an MCU, a second amplifier and a wireless module; the electric field measurement module is used for measuring the potential difference formed by the copper foil and outputting the measured electric field value to a first amplifier; the signal amplified by the first amplifier is input to the MCU; the current measuring sensor is used for measuring the current of a line where the fuse is located and outputting the measured current value to the second amplifier; the signal amplified by the second amplifier is input to the MCU; the MCU reports the measured current value and the electric field value to the management terminal through the wireless module; and the management terminal judges whether the fuse wire of the fuse is fused or the line where the fuse is positioned has a power failure fault according to the reported current value and the electric field value. Because only need install intelligent monitoring base bottom the fuse, put CT ring on the lower lead wire department of fuse, simple structure, do not influence the outward appearance, easily installation, and not only can monitor fuse state, can also monitor and judge whether there are other to the electric current of circuit, electric field value, if the circumstances such as power failure.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a monitoring system of a fuse according to the present invention;
fig. 2a and 2b are schematic diagrams illustrating states of a fuse carrier tube not being ejected and a fuse carrier tube being ejected, respectively, in the fuse provided by the present invention;
FIG. 3 is a schematic diagram illustrating the connection of circuit components in an intelligent monitoring base according to the present invention;
FIG. 4 is a schematic view of a connection between a CT ring and an intelligent monitoring base according to the present invention;
fig. 5a, 5b, and 5c are schematic connection diagrams of circuit elements in the intelligent monitoring base according to three embodiments of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
It is to be noted that technical terms or scientific terms used in the embodiments of the present invention should have the ordinary meanings as understood by those having ordinary skill in the art to which the present disclosure belongs, unless otherwise defined. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
The technical scheme of the invention is explained in detail in the following with the accompanying drawings.
The monitoring system of a fuse that the invention provides, is used for monitoring three fuses set up on the three-phase circuit, its framework is shown as figure 1, including: an intelligent monitoring base 111 provided at the bottom of the fuse for each fuse, a ring-shaped CT (current transformer) ring 112 fitted over the lower lead wire of the fuse, and a management terminal 113 wirelessly communicating with the intelligent monitoring base 111 of each fuse.
The fuse (or fuse body) in fig. 1 is identical to the existing fuse structure, and may specifically include: an upper lead 101, a closed porcelain body 102, a mounting hoop 103, a lower lead 104 and a fuse carrier tube 105. A state in which the melt-carrying tube 105 is not ejected, i.e., a normal state, as shown in fig. 2 a;
the intelligent monitoring base 111 is arranged at the bottom of the fuse protector, and a through hole is formed in the middle of the intelligent monitoring base 111 so that the fuse carrying tube 105 can be ejected out through the through hole; the melt-carrying tube 105 is ejected as shown in FIG. 2 b.
The intelligent monitoring base 111 comprises: the PCB comprises a PCB, a circuit element welded on the PCB, and a pair of copper foils which are paved on the upper surface and the lower surface of the PCB and are opposite to each other in the same shape.
An alternating electric field exists around the circuit where the fuse is located, the copper foil serves as a capacitor, and the capacitor is located in the electric field to form a potential difference. The copper foil is positioned directly below the down-lead 104 to ensure that the monitored electric field value is maximized.
As shown in fig. 3, the circuit components soldered on the PCB board in the smart sensor dock 111 include: the electric field measuring device comprises an electric field measuring module 301, a first amplifier 302, an MCU303, a second amplifier 304 and a wireless module 305.
The input of the electric field measurement module 301 is connected to the copper foil, the output of the electric field measurement module 301 is connected to the input of the first amplifier 302, and the output of the first amplifier 302 is connected to the input of the MCU 303;
the electric field measurement module 301 is configured to measure a potential difference formed by the copper foil, and an electric field value is obtained by detecting the magnitude of the potential difference; the electric field measurement module 301 outputs the measured electric field value to the first amplifier 302; the signal amplified by the first amplifier 302 is input to the MCU303, so that the MCU303 obtains a measured electric field value.
The CT ring 112 includes: a current measurement sensor 311;
the output of the current measuring sensor 311 in the CT-ring 112 is connected into the smart monitoring pedestal 111, as shown in fig. 4;
specifically, the output of the current measuring sensor 311 is connected to the input of the second amplifier 304 in the smart monitoring base 111, and the output of the second amplifier 304 is connected to the input of the MCU 303;
the current measuring sensor 311 converts a large current in a line into a small current with a certain proportion to be output, so that the current of the line where the fuse is located is measured in real time; the current measurement sensor 311 outputs the measured current value to the second amplifier 304; the signal amplified by the second amplifier 304 is amplified and input to the MCU303, so that the MCU303 obtains a measured current value.
The wireless module 305 is connected to the MCU303, and the MCU303 reports the monitored current value and the electric field value to the management terminal 113 through the wireless module 305 in a wireless communication manner. Specifically, the MCU303 may periodically report the monitored current value and the electric field value to the management terminal 113 through the wireless module 305.
The management terminal 113 can judge the condition of fuse fusing of the fuse or the condition of power failure and fault of the line where the fuse is located through the current and electric field values reported by the intelligent monitoring base 111:
if the current value reported by the intelligent monitoring base 111 of the fuse of one phase of the three-phase line is lower than the set current threshold, the electric field value is not lower than the set electric field threshold, the descending amplitude of the current reported electric field value is larger than the set amplitude threshold compared with the electric field value reported before, and the current value and the electric field value reported by the intelligent monitoring bases of the other two fuses are normal, the management terminal 113 judges that the fuse in the fuse of the phase of the line is fused, and the fuse carrier tube is popped out; the condition that the current value is normal specifically refers to the condition that the current value is not lower than a set current threshold; the case that the electric field value is normal specifically refers to the case that the electric field value is not lower than the set electric field threshold, and the descending amplitude of the current reported electric field value compared with the electric field value reported before is not greater than the set amplitude threshold.
If the current values reported by the intelligent monitoring bases of the three fuses of the three-phase line are all lower than the set current threshold value, the electric field values are all lower than the set electric field threshold value, and the descending amplitudes of the current reported electric field values compared with the electric field values reported before are all larger than the set amplitude threshold value, the management terminal 113 judges that the three-phase line has a power failure fault.
The invention provides a scheme for supplying power to circuit elements welded on a PCB (printed circuit board) in an intelligent monitoring base 111, which comprises the following three embodiments:
example one
On the basis of the circuit configuration shown in fig. 3, other circuit elements may also be included, as shown in fig. 5 a; among them, the CT ring 112 may further include: an inductive power sensor 312; the circuit components soldered on the PCB board in the smart monitoring base 111 may further include: a boost module 308.
Wherein, the output of the induction electric sensor 312 in the CT ring 112 is connected to the intelligent monitoring base 111, as shown in fig. 1; specifically, the output of the induction power sensor 312 is connected to the input of the boost module 308; the output of the boosting module 308 is connected with the power line of each circuit element in the intelligent monitoring base 111;
the induction electricity-taking sensor 312 takes electricity from the alternating electric field and outputs the electricity, after the electricity is boosted by the boosting module 308, the boosting module 308 outputs the boosted voltage to supply power to each circuit element in the intelligent monitoring base 111.
Example two
On the basis of the circuit configuration shown in fig. 3, other circuit elements may also be included, as shown in fig. 5 b; among them, the CT ring 112 may further include: an inductive power sensor 312; the circuit components soldered on the PCB board in the smart monitoring base 111 may further include: super capacitor 306, diode D1, boost module 318, diode D2, charge management module 309.
The induction electricity sensor 312 charges the super capacitor 306 through the charging management module 309;
the anode of the diode D1 is connected to the output of the inductive power sensor 312, and the cathode of the diode D1 is connected to the input of the boost module 318;
the anode of the diode D2 is connected with the voltage output end of the super capacitor 306, and the cathode of the diode D2 is connected with the input of the boosting module 318;
the output of the voltage boosting module 318 is connected with the power line of each circuit element in the intelligent monitoring base to supply power to each circuit element.
EXAMPLE III
On the basis of the circuit configuration shown in fig. 3, other circuit elements may also be included, as shown in fig. 5 c; among them, the CT ring 112 may further include: an inductive power sensor 312; the circuit components soldered on the PCB board in the smart monitoring base 111 may further include: super capacitor 306, diode D1, diode D2, charge management module, boost module 328, backup battery 307, diode D3, diode D4.
The induction electricity sensor 312 charges the super capacitor 306 through the charging management module 309;
the anode of the diode D1 is connected to the output of the inductive power sensor 312, and the cathode of the diode D1 is connected to the input of the boost module 328;
the anode of the diode D2 is connected with the voltage output end of the super capacitor 306, and the cathode of the diode D2 is connected with the input of the boosting module 328;
the anode of the diode D3 is connected to the output of the backup battery 307, and the anode of the diode D4 is connected to the output of the boost module 328; the cathodes of the diodes D3 and D4 are connected with the power lines of the circuit elements in the intelligent monitoring base to supply power to the circuit elements.
In addition, the outputs of the induction electricity-taking sensor 312, the super capacitor 306 and the backup battery 307 can be further connected to the MCU303, the MCU303 collects the voltages output by the induction electricity-taking sensor 312, the super capacitor 306 and the backup battery 307, and the MCU303 can also select a proper power supply mode according to the current operation mode of the fuse; the MCU303 may also periodically report the acquired output voltages of the inductive power sensor 312, the super capacitor 306, and the backup battery 307 to the management terminal 113 through the wireless module 305.
Further, the management terminal 113 can also determine the following abnormality or fault through the voltage value reported by the intelligent monitoring base 111:
if the management terminal 113 determines that the output voltage of the induction power sensor, the super capacitor and the backup battery reported by the intelligent monitoring base is lower than the set voltage threshold, it is determined that a low-power event occurs in the intelligent monitoring base, and the intelligent monitoring base 111 is not enough to be supported to work.
If the management terminal 113 does not receive the data reported by the intelligent monitoring base 111 in three consecutive periods and there is no low-power event, that is, at least one of the output voltages of the induction power sensor 312, the super capacitor 306 and the backup battery 307 reported before is greater than or equal to the voltage threshold, it is determined that the communication fault occurs in the intelligent monitoring base 111.
Further, the monitoring system for the fuse provided by the invention can further comprise: a system master station 114.
The management terminal 113 can also be used to upload the judgment result made according to the data reported by the intelligent monitoring base 111 to the system main station 114.
The embodiment of the invention provides an intelligent fuse, which comprises: the fuse (or fuse body), the intelligent monitoring base 111 and the CT ring 112.
The intelligent fuse can be installed on a primary side A, B, C three-phase line of a distribution network transformer, the distribution network line can be protected, the monitoring of the running state of the fuse is realized, and the real-time acquisition of line current and electric field can be carried out. Three intelligent fuses mounted on A, B, C three-phase lines are grouped.
The selection method of the MCU power supply in the intelligent fuse can comprise the following rules:
rule one is as follows: when the measured current value is larger than 0.5A, an induction electricity-taking sensor can be selected to realize on-line continuous electricity taking, the basic functions that the intelligent fuse collects primary current and electric field data at an interval of 5s (the interval can be set), and reports the primary data to the management terminal at an interval of 5min (the interval can be set) are met, and at the moment, the radio frequency circuit of the wireless module is started at intervals of a certain time;
rule two: the intelligent fuse supports real-time reporting of data; when the measured current value is larger than 3A, the on-line continuous power-taking power supply electric quantity can meet the function of immediate real-time reporting, and the radio frequency circuit supporting the wireless module is in a constantly-on state.
Rule three: and preferentially selecting a power supply mode of online continuous power taking, and selecting a super capacitor as a backup power supply to supply power to the equipment when the measured current value cannot meet the electric quantity requirement required by the operating condition of the intelligent fuse and cannot finish online continuous power taking.
Rule four: if the discharge voltage of the super capacitor is lower than the threshold value, the super capacitor cannot supply power; when the induction electricity-taking sensor and the super capacitor can not supply power to the equipment, the battery is selected for supplying power.
The management terminal 113 can be installed in a JP cabinet, a distribution network secondary device and the like, works in cooperation with an intelligent fuse, and has functions of data acquisition, analysis, exception reporting, management and the like. One management terminal can simultaneously receive the uploaded data of at least one group of fuses, and management of at least one group of fuses is achieved. The management terminal 113 collects multiple groups of intelligent fuse monitoring data through micro-power wireless, supports local data interaction with other distribution network equipment in an RS232/485 mode through edge calculation analysis and processing, and uploads the result to the system main station 114; while supporting remote 4G mode transmissions to the system host 114.
The system main station 114 can quickly judge the operation condition of the distribution network line through database management and reported information analysis, generate report records and work orders, and provide reliable data support for distribution network operation and inspection.
The monitoring system of the fuse protector comprises an intelligent monitoring base arranged at the bottom of the fuse protector, a CT ring sleeved at a down-lead of the fuse protector and a management terminal; wherein, include in the intelligent monitoring base: the PCB comprises a PCB, a circuit element welded on the PCB, and a pair of copper foils paved on the upper surface and the lower surface of the PCB; the CT loop includes a current measurement sensor; the circuit element welded on the PCB board comprises: the device comprises an electric field measuring module, a first amplifier, an MCU, a second amplifier and a wireless module; the electric field measurement module is used for measuring the potential difference formed by the copper foil and outputting the measured electric field value to a first amplifier; the signal amplified by the first amplifier is input to the MCU; the current measuring sensor is used for measuring the current of a line where the fuse is located and outputting the measured current value to the second amplifier; the signal amplified by the second amplifier is input to the MCU; the MCU reports the measured current value and the electric field value to the management terminal through the wireless module; and the management terminal judges whether the fuse wire of the fuse is fused or the line where the fuse is positioned has a power failure fault according to the reported current value and the electric field value. Because only need install intelligent monitoring base bottom the fuse, sheathe in CT ring in the lower lead wire department of fuse, simple structure, do not influence the outward appearance, easily install, and not only can monitor fuse state, can also have other situations to the circuit, monitor the condition such as having a power failure.
Further, in the technical scheme of the invention, the management terminal can also judge low-power events and communication faults.
Computer-readable media of the present embodiments, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the idea of the invention, also features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.
In addition, well known power/ground connections to Integrated Circuit (IC) chips and other components may or may not be shown within the provided figures for simplicity of illustration and discussion, and so as not to obscure the invention. Furthermore, devices may be shown in block diagram form in order to avoid obscuring the invention, and also in view of the fact that specifics with respect to implementation of such block diagram devices are highly dependent upon the platform within which the present invention is to be implemented (i.e., specifics should be well within purview of one skilled in the art). Where specific details (e.g., circuits) are set forth in order to describe example embodiments of the invention, it should be apparent to one skilled in the art that the invention can be practiced without, or with variation of, these specific details. Accordingly, the description is to be regarded as illustrative instead of restrictive.
While the present invention has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art in light of the foregoing description. For example, other memory architectures (e.g., dynamic ram (dram)) may use the discussed embodiments.
The embodiments of the invention are intended to embrace all such alternatives, modifications and variances that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements and the like that may be made without departing from the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. A monitoring system for a fuse for monitoring a fuse disposed on a three-phase line, the system comprising:
the intelligent monitoring base is arranged at the bottom of the fuse, the CT ring is sleeved at the lower lead of the fuse, and the management terminal is arranged on the CT ring; wherein, include in the intelligent monitoring base: the PCB comprises a PCB, a circuit element welded on the PCB, and a pair of copper foils paved on the upper surface and the lower surface of the PCB; the CT loop includes a current measurement sensor; the circuit element welded on the PCB board comprises: the device comprises an electric field measuring module, a first amplifier, an MCU, a second amplifier and a wireless module;
the electric field measurement module is used for measuring the potential difference formed by the copper foil and outputting the measured electric field value to a first amplifier; the signal amplified by the first amplifier is input to the MCU;
the current measuring sensor is used for measuring the current of a line where the fuse is located and outputting the measured current value to the second amplifier; the signal amplified by the second amplifier is input to the MCU;
the MCU reports the measured current value and the electric field value to the management terminal through the wireless module; and the management terminal judges that the fuse wire of the fuse is fused or the line where the fuse is positioned has a power failure fault according to the reported current value and the electric field value.
2. The system of claim 1,
the management terminal is specifically used for judging that a fuse wire in the fuse of one phase line is fused and a fuse carrier tube pops out if the current value reported by the intelligent monitoring base of the fuse of the other phase line is lower than a set current threshold value, the electric field value is not lower than a set electric field threshold value, the descending amplitude of the current reported electric field value is larger than the set amplitude threshold value compared with the electric field value reported before, and the current value and the electric field value reported by the intelligent monitoring base of the other two fuses are normal; if the current values reported by the intelligent monitoring bases of the three fuses of the three-phase line are all lower than the set current threshold value, the electric field values are all lower than the set electric field threshold value, and the descending amplitudes of the current reported electric field values compared with the electric field values reported before are all larger than the set amplitude threshold value, the three-phase line is judged to have power failure.
3. The system of claim 1, wherein the CT ring further comprises: an induction electricity-taking sensor; the circuit element soldered on the PCB further comprises: a boost module;
the induction electricity taking sensor takes electricity from the alternating electric field and outputs the electricity, and the electricity is boosted by the boosting module; the boosting module outputs boosted voltage to supply power for each circuit element in the intelligent monitoring base.
4. The system of claim 1, wherein the CT ring further comprises: an induction electricity-taking sensor; the circuit element soldered on the PCB further comprises: the charging management module comprises a super capacitor, a diode D1, a boosting module, a diode D2 and a charging management module;
the induction electricity taking sensor charges the super capacitor through the charging management module;
the anode of the diode D1 is connected with the output of the induction electricity-taking sensor, and the cathode of the diode D1 is connected with the input of the boosting module;
the anode of the diode D2 is connected with the voltage output end of the super capacitor, and the cathode of the diode D2 is connected with the input of the boosting module;
the output of the boosting module is connected with power lines of all circuit elements in the intelligent monitoring base to supply power to all circuit elements.
5. The system of claim 1, wherein the CT ring further comprises: an induction electricity-taking sensor; the circuit element soldered on the PCB further comprises: the system comprises a super capacitor, a diode D1, a boosting module, a diode D2, a charging management module, a standby battery, a diode D3 and a diode D4;
the induction electricity taking sensor charges the super capacitor through the charging management module;
the anode of the diode D1 is connected with the output of the induction electricity-taking sensor, and the cathode of the diode D1 is connected with the input of the boosting module;
the anode of the diode D2 is connected with the voltage output end of the super capacitor, and the cathode of the diode D2 is connected with the input of the boosting module;
the anode of the diode D3 is connected with the output of the backup battery, and the anode of the diode D4 is connected with the output of the boosting module; the cathodes of the diodes D3 and D4 are connected with the power lines of the circuit elements in the intelligent monitoring base to supply power to the circuit elements.
6. The system of claim 5, wherein the outputs of the induction electricity-taking sensor, the super capacitor and the backup battery are all connected with the MCU; and
the MCU is also used for periodically reporting the acquired output voltages of the induction electricity-taking sensor, the super capacitor and the standby battery to the management terminal through the wireless module.
7. The system of claim 6,
and the management terminal is also used for judging that the intelligent monitoring base has a low-power event after confirming that the output voltage of the induction electricity-taking sensor, the super capacitor and the standby battery reported by the intelligent monitoring base is lower than a set voltage threshold value.
8. The system of claim 7,
the management terminal is further used for judging that the intelligent monitoring base has a communication fault if the management terminal does not receive the data reported by the intelligent monitoring base in three continuous periods and no low-power event exists.
9. The system of claim 7, further comprising: a system master station;
and the management terminal is also used for uploading a judgment result made according to the data reported by the intelligent monitoring base to the system main station.
10. An intelligent fuse, comprising: a fuse body and a smart monitoring base and CT ring in a system as claimed in any one of claims 1 to 9.
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| CN202010844636.XA CN112345927B (en) | 2020-08-20 | 2020-08-20 | Monitoring system of fuse and intelligent fuse |
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| CN202010844636.XA CN112345927B (en) | 2020-08-20 | 2020-08-20 | Monitoring system of fuse and intelligent fuse |
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Cited By (1)
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| CN116742794A (en) * | 2023-04-28 | 2023-09-12 | 北京国电通网络技术有限公司 | Intelligent monitoring equipment and method for closed type jet type fuse |
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| CN112345927B (en) | 2023-07-07 |
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