CN112345927B - Monitoring system of fuse and intelligent fuse - Google Patents
Monitoring system of fuse and intelligent fuse Download PDFInfo
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- CN112345927B CN112345927B CN202010844636.XA CN202010844636A CN112345927B CN 112345927 B CN112345927 B CN 112345927B CN 202010844636 A CN202010844636 A CN 202010844636A CN 112345927 B CN112345927 B CN 112345927B
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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
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
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 at the bottom of the fuse; wherein, include in the intelligent monitoring base: the PCB, the 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 ring comprises a current measurement sensor; the circuit element welded on the PCB board comprises: the device comprises an electric field measurement module, a first amplifier, an MCU, a second amplifier and a wireless module; and the management terminal judges whether the fuse wire of the fuse is blown or a power failure fault occurs in the circuit according to the current value and the electric field value reported by the MCU. The invention can monitor the fuse state of the fuse, monitor the current and electric field value of the circuit and judge whether other conditions exist, such as power failure.
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
In the distribution network line of China, fuses are widely used, the principle of the fuses is that the line current is limited mainly by fuses with different selected limit currents, when a large-current fault occurs, the current exceeds the rated current of the fuses, the melts are fused to form electric arcs, then the electric arcs gasify special materials in arc extinguishing pipes to generate a large amount of gas under the high temperature effect, the electric arcs are blown out when the current crosses zero by means of the gas, and the fuse carrying pipes are pushed out of the fuse body through the spring effect to form an electric port, so that the fault is cut off, and the protection of the distribution network line is realized. The existing difficult problem is that the running state of the fuse and the running state of the circuit are difficult to accurately judge, and the fault is difficult to locate.
There are many fuse carrying tube state monitoring methods of the fuse at present, for example, a method of monitoring by using a gravity sensing mode, a method of monitoring by using a displacement sensor, and the like. The monitoring method by utilizing the gravity sensing mode comprises the steps that when the fuse carrying tube pops up, the gravity sensing detection circuit detects that the carrying tube falls off, the trigger circuit wakes up the singlechip when the carrying tube falls off, and the singlechip processes acquired state data information after being waken up to determine that the fuse is blown. However, the method needs to additionally punch and install the sensor on the fuse base, so that the structure is complex, the appearance is affected, and the installation is not easy.
The method for monitoring by utilizing the displacement sensor is that a position monitoring component is arranged on the fuse body, the position of the monitoring component corresponds to the position of the fuse carrying tube on the fuse body, and the monitoring component judges the on-off state of the fuse through the change of the position of the fuse carrying tube. However, the method can only monitor the fuse state of the fuse, but whether other states exist in the distribution network line or not, such as power failure and the like, cannot be judged.
Disclosure of Invention
Therefore, the invention aims to provide a monitoring system of a fuse and an intelligent fuse, which have simple structure, do not influence the appearance and are easy to install, can monitor the fuse state of the fuse, can monitor the current and the electric field value of a line and judge whether other conditions exist, such as power failure and the like.
In view of the above, the present invention provides a fuse monitoring system for monitoring a fuse provided 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 at the bottom of the fuse; wherein, include in the intelligent monitoring base: the PCB, the 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 ring comprises a current measurement sensor; the circuit element welded on the PCB board comprises: the device comprises an electric field measurement 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 the 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 the circuit 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 blown or a power failure fault occurs on a line where the fuse is located according to the reported current value and the electric field value.
Preferably, the management terminal is specifically configured to determine that the fuse wire in the fuse wire of the phase line is blown if the current value reported by the intelligent monitoring base of the fuse wire of the phase line is lower than the set current threshold, the electric field value is not lower than the set electric field threshold, and the decreasing amplitude of the currently reported electric field value compared with the previously reported electric field value is greater than the set amplitude threshold, and the current values and the electric field values reported by the intelligent monitoring bases of the other two fuse wires are both normal; if the current values reported by the intelligent monitoring bases of the three fuses of the three-phase line are lower than the set current threshold value, the electric field values are lower than the set electric field threshold value, and the descending amplitude of the currently reported electric field values compared with the previously reported electric field values is larger than the set amplitude threshold value, judging that the three-phase line has a power failure.
Preferably, the CT ring further comprises: an induction pickup sensor; the circuit element welded on the PCB board further comprises: a boost module;
the induction power taking sensor takes power from the alternating electric field and outputs the power, and the power is boosted by the boosting module; the boosting module outputs boosted voltage to supply power for all circuit elements in the intelligent monitoring base.
Alternatively, the CT ring further includes: an induction pickup sensor; the circuit element welded on the PCB board further comprises: the device 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 pickup 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 the power line of each circuit element in the intelligent monitoring base to supply power for each circuit element.
Alternatively, the CT ring further includes: an induction pickup sensor; the circuit element welded on the PCB board further comprises: the device 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 pickup 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 the power line of each circuit element in the intelligent monitoring base to supply power for each circuit element.
Preferably, the outputs of the induction power 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 voltage of the induction power-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 the intelligent monitoring base has a low battery event after determining that the output voltages of the inductive pickup sensor and the super capacitor reported by the intelligent monitoring base and the standby battery are lower than the set voltage threshold.
Preferably, the management terminal is further configured to determine that a communication failure 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 main 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 master station.
The invention also provides an intelligent fuse comprising: fuse body and, intelligent monitoring base and CT ring in the system as described above.
The monitoring system of the fuse of the technical scheme comprises an intelligent monitoring base arranged at the bottom of the fuse, a CT ring sleeved at the lower lead of the fuse and a management terminal; wherein, include in the intelligent monitoring base: the PCB, the 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 ring comprises a current measurement sensor; the circuit element welded on the PCB board comprises: the device comprises an electric field measurement 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 the 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 the circuit 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 blown or the circuit where the fuse is located has a power failure fault according to the reported current value and the electric field value. Because only need install intelligent monitoring base in the fuse bottom, cover CT ring in the lower lead wire department of fuse, simple structure does not influence outward appearance, easily installation, and not only can monitor the fuse state of fuse, can also monitor the electric current of circuit, electric field value and judge whether there are other, like circumstances such as outage.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
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 of a fuse carrier in a fuse provided by the present invention in a state in which the fuse carrier is not ejected;
FIG. 3 is a schematic diagram of circuit components in an intelligent monitoring base according to the present invention;
FIG. 4 is a schematic diagram illustrating the connection between a CT ring and an intelligent monitoring base according to the present invention;
fig. 5a, 5b, and 5c are schematic diagrams of circuit element connection in the intelligent monitoring base according to three embodiments of the present invention.
Detailed Description
The present invention will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent.
It should be noted that unless otherwise defined, technical or scientific terms used in the embodiments of the present invention should be given the ordinary meaning as understood by one of ordinary skill in the art to which the present disclosure pertains. The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
The technical scheme of the invention is described in detail below with reference to the accompanying drawings.
The invention provides a monitoring system of a fuse, which is used for monitoring three fuses arranged on a three-phase line, and the architecture is shown in figure 1, and comprises: an intelligent monitoring base 111 provided at the bottom of the fuse for each fuse, an annular CT (current transformer) ring 112 sleeved at the lower lead of the fuse, and a management terminal 113 in wireless communication with the intelligent monitoring base 111 of each fuse.
The fuse (or referred to as fuse body) in fig. 1 is consistent with the existing fuse structure, and may specifically include: an upper lead 101, a closed porcelain body 102, a mounting anchor 103, a lower lead 104 and a fuse carrying tube 105. The state in which the carrier fusion pipe 105 is not ejected, i.e., the normal state, as shown in fig. 2 a;
an intelligent monitoring base 111 installed at the bottom of the fuse, a via hole being provided in the middle so that the fuse carrying tube 105 can be ejected through the via hole; the state in which the carrier melting tube 105 pops up is shown in fig. 2 b.
The intelligent monitoring base 111 includes: the PCB comprises a PCB board, a circuit element welded on the PCB board and a pair of copper foils which are paved on the upper surface and the lower surface of the PCB board and are opposite in shape and position.
An alternating electric field exists around the circuit where the fuse is located, the copper foil acts 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, circuit elements soldered on a PCB board in the intelligent monitoring base 111 include: the electric field measuring module 301, the first amplifier 302, the MCU303, the second amplifier 304 and the wireless module 305.
Wherein, 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 characterize and obtain an electric field value 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.
Included in CT ring 112 are: a current measurement sensor 311;
the output of the current measurement sensor 311 in the CT ring 112 is connected to the intelligent monitoring base 111 as shown in fig. 4;
specifically, the output of the current measurement sensor 311 is connected to the input of the second amplifier 304 in the intelligent monitoring base 111, and the output of the second amplifier 304 is connected to the input of the MCU 303;
the current measurement sensor 311 converts large current in a line into small current with a certain proportion and outputs the small current, so that real-time measurement of the current of the line where the fuse is located is realized; 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 inputted to the MCU303, so that the MCU303 obtains a measured current value.
The wireless module 305 is connected with the MCU303, and the MCU303 reports the monitored current value and the monitored electric field value to the management terminal 113 in a wireless communication mode through the wireless module 305. Specifically, the MCU303 may periodically report the monitored current value, the electric field value, and the like to the management terminal 113 through the wireless module 305.
The management terminal 113 can judge the condition of the fuse wire of the fuse through the current and the electric field value reported by the intelligent monitoring base 111, or the condition of power failure and fault of the circuit where the fuse is located:
if the current value reported by the intelligent monitoring base 111 of the fuse of one 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, and the descending amplitude of the currently reported electric field value compared with the previously reported electric field value is larger than the set amplitude threshold, 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 line is fused, and the fuse carrying tube pops up; the current value is normal, specifically, the current value is not lower than a set current threshold value; the case that the electric field value is normal specifically refers to the case that the electric field value is not lower than a set electric field threshold value, and the current reported electric field value is not greater than the set amplitude threshold value compared with the previously reported electric field value.
If the current values reported by the intelligent monitoring bases of the three fuses of the three-phase line are lower than the set current threshold value, the electric field values are lower than the set electric field threshold value, and the descending amplitude of the currently reported electric field values compared with the previously reported electric field values is larger than the set amplitude threshold value, the management terminal 113 judges that the three-phase line has a power failure.
The present invention provides the following three embodiments for powering circuit elements soldered to a PCB board in the intelligent monitoring base 111:
example 1
Other circuit elements may be included on the basis of the circuit configuration shown in fig. 3, as shown in fig. 5 a; wherein, the CT ring 112 may further include: an inductive pickup sensor 312; the circuit elements soldered on the PCB board in the intelligent monitoring base 111 may further include: a boost module 308.
The output of the inductive pickup sensor 312 in the CT ring 112 is connected to the intelligent monitoring base 111, as shown in fig. 1; specifically, the output of inductive pickup sensor 312 is connected to the input of boost module 308; the output of the boost module 308 is connected with the power lines of the circuit elements in the intelligent monitoring base 111;
the induction electricity-taking sensor 312 takes electricity from the alternating electric field and outputs the electricity, and after the electricity is boosted by the voltage-boosting module 308, the voltage boosted by the voltage-boosting module 308 is output to supply power for all circuit elements in the intelligent monitoring base 111.
Example two
Other circuit elements may be included on the basis of the circuit configuration shown in fig. 3, as shown in fig. 5 b; wherein, the CT ring 112 may further include: an inductive pickup sensor 312; the circuit elements soldered on the PCB board in the intelligent monitoring base 111 may further include: super capacitor 306, diode D1, boost module 318, diode D2, charge management module 309.
Wherein, the inductive pickup sensor 312 charges the super capacitor 306 through the charging management module 309;
an anode of the diode D1 is connected with the output of the inductive pickup sensor 312, and a cathode of the diode D1 is connected with the input of the boosting 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 boost module 318 is connected to the power lines of the circuit elements in the intelligent monitoring base, so as to supply power to the circuit elements.
Example III
Other circuit elements may be included on the basis of the circuit configuration shown in fig. 3, as shown in fig. 5 c; wherein, the CT ring 112 may further include: an inductive pickup sensor 312; the circuit elements soldered on the PCB board in the intelligent monitoring base 111 may further include: super capacitor 306, diode D1, diode D2, charge management module, boost module 328, battery backup 307, diode D3, diode D4.
Wherein, the inductive pickup sensor 312 charges the super capacitor 306 through the charging management module 309;
the anode of diode D1 is connected to the output of inductive pick-up sensor 312, and the cathode of diode D1 is connected to the input of 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;
an anode of a diode D3 is connected to the output of the backup battery 307, and an anode of a diode D4 is connected to the output of the boost module 328; the cathodes of the diodes D3 and D4 are connected with power lines of all circuit elements in the intelligent monitoring base to supply power for all the circuit elements.
In addition, the output of the inductive pickup sensor 312, the super capacitor 306 and the standby battery 307 can be connected to the MCU303, the MCU303 can collect the voltages output by the inductive pickup sensor 312, the super capacitor 306 and the standby battery 307, and the MCU303 can select a suitable power supply mode according to the operation mode of the current fuse; the MCU303 may also periodically report the collected output voltages of the inductive pickup 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 failure by intelligently monitoring the voltage value reported by the base 111:
if the management terminal 113 confirms that the output voltages of the inductive power taking sensor and the super capacitor reported by the intelligent monitoring base and the output voltage of the standby battery are lower than the set voltage threshold, the intelligent monitoring base is judged to have a low-power event, and the intelligent monitoring base 111 is not sufficiently 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 battery event, that is, at least one of the output voltages of the inductive pickup sensor 312, the super capacitor 306, and the backup battery 307, which are reported before, is greater than or equal to the voltage threshold, it is determined that the intelligent monitoring base 111 has a communication failure.
Further, the monitoring system of the fuse provided by the invention can further comprise: the system master 114.
The management terminal 113 may also be configured to upload the determination result made according to the data reported by the intelligent monitoring base 111 to the system master 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 arranged on a three-phase line of the primary side A, B, C of the distribution network transformer, a distribution network line can be protected, meanwhile, the monitoring of the running state of the fuse is realized, and the real-time acquisition of line current and electric field can be also carried out. Three intelligent fuses are installed on a A, B, C three-phase line in a group.
The MCU power supply selection method in the intelligent fuse can comprise the following rules:
rule one: when the measured current value is larger than 0.5A, the induction electricity taking sensor can be selected to realize online continuous electricity taking, the basic functions of collecting primary current and electric field data at intervals of 5s (the intervals can be set) of the intelligent fuse and reporting the primary data to the management terminal at intervals of 5min (the intervals can be set) are met, and at the moment, the radio frequency circuit of the wireless module is started at intervals for a certain time;
rule II: the intelligent fuse supports real-time reporting of data; when the measured current value is larger than 3A, the on-line continuous power supply quantity can meet the function of immediate real-time reporting, and the radio frequency circuit supporting the wireless module is in a constantly-opened state.
Rule III: the power supply mode of online continuous power taking is preferentially selected, and when the measured current value cannot meet the electric quantity requirement required by the operation working condition of the intelligent fuse and online continuous power taking cannot be completed, the super capacitor is selected as a backup power supply to supply power to equipment.
Rule IV: if the discharge voltage of the super capacitor is lower than the threshold value, the super capacitor cannot supply power; when the induction power taking sensor and the super capacitor can not supply power for the equipment, the battery is selected for power supply.
The management terminal 113 can be installed at the place of the JP cabinet, the secondary equipment of the distribution network and the like, works together with the intelligent fuse, and has the functions of data acquisition, analysis, abnormal reporting, management and the like. And one management terminal can simultaneously receive the uploading data of at least one group of fuses to realize the management of at least one group of fuses. The management terminal 113 collects multiple groups of intelligent fuse monitoring data wirelessly through micropower, supports data interaction with other distribution network equipment in a local RS232/485 mode through edge calculation analysis and processing, and uploads the result to the system master station 114; while supporting remote 4G mode transmissions to the system master 114.
The system master station 114 can rapidly judge the running condition of the distribution network line through database management and report 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 of the technical scheme comprises an intelligent monitoring base arranged at the bottom of the fuse, a CT ring sleeved at the lower lead of the fuse and a management terminal; wherein, include in the intelligent monitoring base: the PCB, the 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 ring comprises a current measurement sensor; the circuit element welded on the PCB board comprises: the device comprises an electric field measurement 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 the 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 the circuit 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 blown or the circuit where the fuse is located has a power failure fault according to the reported current value and the electric field value. Because only need install intelligent monitoring base in the fuse bottom, cover CT ring in the lower lead wire department of fuse, simple structure does not influence outward appearance, easily installation, and not only can monitor the fuse state of fuse, can also monitor whether other situations exist to the circuit, like circumstances such as outage.
Furthermore, in the technical scheme of the invention, the management terminal can also judge low-battery events and communication faults.
The computer readable media of the present embodiments, including both permanent and non-permanent, removable and non-removable media, may be used to 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 storage media for a computer 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, which can be used to store information that can be accessed by a computing device.
Those of ordinary skill in the art will appreciate that: the discussion of any of the embodiments above is merely exemplary and is not intended to suggest that the scope of the disclosure, including the claims, is limited to these examples; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the invention, the 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.
Additionally, well-known power/ground connections to Integrated Circuit (IC) chips and other components may or may not be shown within the provided figures, in order to simplify the illustration and discussion, and so as not to obscure the invention. Furthermore, the 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., such 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 in nature and not as restrictive.
While the invention has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of those embodiments will be apparent to those skilled in the art in light of the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may use the embodiments discussed.
The embodiments of the invention are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, improvement, etc. of the present invention should be included in the scope of the present invention.
Claims (10)
1. A system 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 at the bottom of the fuse; wherein, include in the intelligent monitoring base: the PCB, the 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 ring comprises a current measurement sensor; the circuit element welded on the PCB board comprises: the device comprises an electric field measurement 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 the 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 the circuit 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 blown or a power failure fault occurs on a line where the fuse is located according to the reported current value and the electric field value.
2. The system of claim 1, wherein the system further comprises a controller configured to control the controller,
the management terminal is specifically configured to determine that the fuse wire in the fuse wire of the phase line is blown if the current value reported by the intelligent monitoring base of the fuse wire of the phase line is lower than the set current threshold value, the electric field value is not lower than the set electric field threshold value, 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 fuse wires are normal; if the current values reported by the intelligent monitoring bases of the three fuses of the three-phase line are lower than the set current threshold value, the electric field values are lower than the set electric field threshold value, and the descending amplitude of the currently reported electric field values compared with the previously reported electric field values is larger than the set amplitude threshold value, judging that the three-phase line has a power failure.
3. The system of claim 1, wherein the CT loop further comprises: an induction pickup sensor; the circuit element welded on the PCB board further comprises: a boost module;
the induction power taking sensor takes power from the alternating electric field and outputs the power, and the power is boosted by the boosting module; the boosting module outputs boosted voltage to supply power for all circuit elements in the intelligent monitoring base.
4. The system of claim 1, wherein the CT loop further comprises: an induction pickup sensor; the circuit element welded on the PCB board further comprises: the device 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 pickup 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 the power line of each circuit element in the intelligent monitoring base to supply power for each circuit element.
5. The system of claim 1, wherein the CT loop further comprises: an induction pickup sensor; the circuit element welded on the PCB board further comprises: super capacitor, diode D1, boost module, diode D2, charge management module, standby battery, diode D3, 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 pickup 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 standby 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 power lines of all circuit elements in the intelligent monitoring base to supply power for all the circuit elements.
6. The system of claim 5, wherein the outputs of the inductive pickup sensor, the super capacitor, and the backup battery are all connected to the MCU; and
the MCU is also used for periodically reporting the acquired output voltage of the induction power-taking sensor, the super capacitor and the standby battery to the management terminal through the wireless module.
7. The system of claim 6, wherein the system further comprises a controller configured to control the controller,
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 power taking sensor and the super capacitor reported by the intelligent monitoring base and the output voltage of the standby battery are lower than a set voltage threshold.
8. The system of claim 7, wherein the system further comprises a controller configured to control the controller,
the management terminal is also used for judging that the intelligent monitoring base has communication faults if the data reported by the intelligent monitoring base is not received in three continuous periods and no low-power event exists.
9. The system of claim 7, further comprising: a system main 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 master station.
10. An intelligent fuse, comprising: a fuse body and an intelligent monitoring base and a 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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| CN112345927B true CN112345927B (en) | 2023-07-07 |
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| CN116742794B (en) * | 2023-04-28 | 2024-03-29 | 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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