CN102901908A - Cable operation information monitoring system and implement method thereof - Google Patents
Cable operation information monitoring system and implement method thereof Download PDFInfo
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- CN102901908A CN102901908A CN2012103408390A CN201210340839A CN102901908A CN 102901908 A CN102901908 A CN 102901908A CN 2012103408390 A CN2012103408390 A CN 2012103408390A CN 201210340839 A CN201210340839 A CN 201210340839A CN 102901908 A CN102901908 A CN 102901908A
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Abstract
The invention discloses a cable operation information monitoring system and an implement method thereof. The cable operation information monitoring system comprises an information sensor assembly, an information collecting terminal, a data managing repeater, a monitoring center and a field detection terminal; the information collecting terminal is composed of a voltage signal collecting circuit, a current signal collecting circuit, an analogue switch, a first advanced RISC machine (ARM) processor and a first wireless transmitting and receiving module; an output end of the analogue switch is connected with a corresponding input end of the first ARM processor; the data managing repeater is composed of a global positioning system (GPS) timing module, a first general packet radio service (GPRS) module and a second ARM module; and the monitoring center comprises a web server, a database server and a second GPRS module. By means of the cable operation information monitoring system, information of cable temperatures, current, electric field changes and the like is effectively evaluated and diagnosed, data records are periodically collected in 24 hours, and power distribution reliability is greatly improved by means of condition based maintenance.
Description
Technical field
The present invention relates to a kind of cable operation information monitoring system and its implementation.
Background technology
Development along with the city, the increase of power consumption, the phenomenon that cable splice breaks down happens occasionally, the abominable unmanned of equipment operating environment in the situation is difficult for being found after breaking down in the cable part mostly, and accident spreads namely and causes a serious accident, impact is normal produces, cause the heavy losses of economy and prestige to electric power enterprise, therefore, trouble-saving generation then becomes the basic of safety in production.In the world in recent years by the cable operation conditions is monitored, the method that in advance discovery conceals defects is avoided the generation of cable interruption of service, and State Grid Corporation of China also requires the monitoring of Efforts To Develop cable status and service work, makes every effort to reduce sudden loss of power accident incidence.
Present many electric companies have all adopted the measure of strengthening manual inspection, strengthen operational management, but this mode workload is large, can't realize Continuous Tracking observation cable operation information changing condition; Passing through of also having installed the EKA fault detector additional at ring main unit or line contacts, at branch line thermistor probe is installed, these devices have certain effect to the temperature of single cable splice and the fault warning of curent change, but owing to can't merge with the adjacent cable tag data, criterion is single, False Rate is high, must confirm by the manual segmentation outage maintenance mode of operating a switch, and these devices can't be brought into play should effect.
Summary of the invention
Technical matters to be solved by this invention provides a kind of fault alarm and fast automatic location defect or fault section, improves the fault alarm accuracy and reduces trouble shooting time; Solved the deficiency that existing simple function product exists, saved greatly resource and improved cable operation information monitoring system and its implementation of operational efficiency.
The technical solution adopted for the present invention to solve the technical problems:
The present invention includes information sensor assembly, information acquisition terminal, data management repeater, Surveillance center and scene and patrol and examine terminal;
Described information acquisition terminal is comprised of voltage signal acquisition circuit, current signal Acquisition Circuit, analog switch, the first arm processor, the first radio receiving transmitting module; Described voltage signal acquisition circuit is connected output terminal and is connected with the respective input of analog switch respectively with the current signal Acquisition Circuit; The output terminal of described analog switch is connected with the respective input of the first arm processor; Described the first arm processor is connected with the first radio receiving transmitting module is two-way by the UART agreement, and the I/O synchronizing pulse interface of the first arm processor connects the corresponding controling end of described analog switch simultaneously;
The voltage of described information sensor assembly, electric current and temperature information be connected output terminal respectively the input end by shielded cable and described voltage signal acquisition circuit, current signal Acquisition Circuit input end be connected the respective input of arm processor and be connected;
Described data management repeater during by the GPS school module, a GPRS module, the second arm processor form; Module is two-way during with the GPS school is connected by the UART agreement for described the second arm processor, and the second arm processor is connected by the UART agreement is two-way with the first arm processor, and the second arm processor passes through the UART agreement and the one the GPRS module is two-way is connected;
Described Surveillance center comprises WEB server, database server and the 2nd GPRS module; Described database server is connected with the WEB server is two-way; Database server by the UART agreement with the 2nd the GPRS module is two-way is connected; Described the 2nd GPRS module and GPRS module wireless connections;
Described scene is patrolled and examined terminal and is comprised of mobile PCs, the second radio receiving transmitting module; Described mobile PCs is connected with the WEB server is two-way by the Internet network; Mobile PCs is connected with the second radio receiving transmitting module is two-way, the second radio receiving transmitting module and the first radio receiving transmitting module wireless connections.
Described information sensor assembly is comprised of shell, permalloy magnetic core, electric current inductive coil, voltage of electric field sensing chip, temperature sensor and belt siliconized plate; Described permalloy magnetic core is arranged in shell, and the left and right sides wall of shell is stretched out respectively at its two ends, and permalloy magnetic core left end is provided with external thread, and right-hand member extend in the left end hole of the link that is fixed on the shell outer right wall; Link is provided with vertical slotted eye, and the link right-hand member is provided with internal thread in the hole; Described belt siliconized plate extend in the described vertical slotted eye, and fixes with lock-screw; The left end of belt siliconized plate is enclosed within on the permalloy magnetic core, and fixes by set nut, and the loop sleeve of electric current inductive coil is arranged at permalloy magnetic core cover; Between loop sleeve and shell right side inwall, be provided with and be enclosed within voltage of electric field sensing chip on the permalloy magnetic core; Described temperature sensor is contained in the hole of housing bottom of shell, is stained with heat conduction silica gel pad in the bottom of housing.
Described voltage signal acquisition circuit is comprised of isolation protective circuit, current rectifying and wave filtering circuit and bleeder circuit;
Described isolation protective circuit is comprised of voltage stabilizing diode W1, filter capacitor C1 and diode D1; The positive pole of described voltage stabilizing diode W1 links to each other with the output terminal of the voltage of information sensor assembly, the minus earth of voltage stabilizing diode W1; Described filter capacitor C1 is in parallel with voltage stabilizing diode W1; Described diode D1 negative pole links to each other the plus earth of diode D1 with the positive pole of stabilivolt W1;
Described current rectifying and wave filtering circuit is comprised of commutation diode D2 and filter capacitor C2; The positive pole of described commutation diode D2 links to each other with the output terminal of the voltage of information sensor assembly, and the negative pole of commutation diode D2 is through filter capacitor C2 ground connection;
Described bleeder circuit is comprised of resistance R 1-R2 and capacitor C 3; Described resistance R 1-R2 forms the series connection bleeder circuit and is connected between the node and ground of commutation diode D2 and filter capacitor C2; Described filter capacitor C3 is in parallel with resistance R 2;
Described current signal Acquisition Circuit is comprised of holding circuit and amplifying circuit; Described holding circuit is comprised of diode D3-D4 and voltage stabilizing diode W2; The plus earth of described diode D3, the negative pole of diode D3 connects the current output terminal of information sensor assembly; The positive pole of described diode D4 connects the current output terminal of information sensor assembly, the minus earth of diode D4; The positive pole of described voltage stabilizing diode W2 links to each other with the negative pole of diode D3, the minus earth of zener diode W2;
Described amplifying circuit is comprised of capacitor C 4-C5, resistance R 3-R5 and integrated operational amplifier K; The inverting input of described integrated operational amplifier K is connected on the current output terminal of information sensor assembly through resistance R 3; The in-phase input end of integrated operational amplifier K is through resistance R 4 ground connection; Described capacitor C 4 is connected between the node and ground of inverting input of resistance R 3 and integrated operational amplifier K; Described capacitor C 2 and resistance R 5 also are connected between the inverting input and analog switch respective input of integrated operational amplifier K;
The model of described analog switch is SGM4717; The model of described first, second radio receiving transmitting module is NRF240; The model of described first, second GPRS module is H7210; The model of module is NEO-5 during described GPS school; The model of described the first arm processor and the second arm processor is all STM320F103.
The implementation method of described cable operation information monitoring system is characterized in that step is as follows:
(1) initialization;
(2) the first arm processor of described information acquisition terminal reads respectively changing value △ T, the △ I of temperature, electric current, voltage, the total data of △ U;
(3) judge whether temperature variation △ T surpasses default alarm threshold value; If △ T surpasses default alarm threshold value, enter (3-1) step; Otherwise went to for (4) step;
(3-1) described information acquisition terminal output alarm information exchange is crossed UART communication protocol and is passed to the data management repeater; Pass to Surveillance center by described first, second GPRS module again;
(4) judge whether super ground connection limit value is whether circuit singlephase earth fault occurs to voltage variety △ U; If △ U surpasses the ground connection limit value, enter (4-1) step; Otherwise went to for (5) step;
The extracting data steady-state current that (4-1) reads from the first arm processor of described information acquisition terminal enters respectively (4-1-1) step and (4-1-3) goes on foot; Go out transient current from the extracting data that reads simultaneously, enter (4-1-2) step;
(4-1-1) choose the steady-state current signal of a cycle after the fault; Utilize fft algorithm to extract the real component of electric current;
(4-1-1-1) judge that real component is with respect to total current value proportion x
1
(4-1-1-2) provide fault measurement by following formula: (lgx
1+ 3.7)/2; Enter (4-2) step;
(4-1-2) polarity of comparison transient current and voltage;
(4-1-2-1) utilize first half-wave method polarity to do criterion;
(4-1-2-2) calculate fault measurement, design conditions are as follows:
A, voltage of electric field are undergone mutation, and △ V bust is greater than 50%, and then fault measurement is 0.5;
B, transient current and polarity of voltage are opposite, and then fault measurement is 0.5;
Fault measurement is the fault measurement sum of a, b two design conditions; Enter (4-2) step;
(4-1-3) choose the steady-state current signal of a cycle after the fault; Utilize fft algorithm to extract electric current quintuple harmonics component;
(4-1-3-1) judge that the quintuple harmonics component is with respect to total current value proportion x
2
(4-1-3-2) provide fault measurement by following formula: (lgx
2+ 4.6)/3; Enter (4-2) step;
(4-2) three kinds of fault measurements are averaged, obtain the fault measurement result, fault measurement mean value is judged to be fault and determines to occur greater than 0.6, enters (4-3) step; Otherwise be uncertain;
(4-3) the record moment and output alarm information;
(5) judge whether ultrashort road limit value of △ I; If the ultrashort road of △ I limit value enters (5-1) step; Otherwise go to (2) step;
(5-1) carry out timing and judge, the time is to entering (5-2) step;
(5-2) reach timing, short-circuit alarming.
Beneficial effect of the present invention is as follows:
By using the cable information monitoring system that the information such as cable temperature, electric current, electric field change are carried out effective appraisement and diagnosis, realize cycle collection data recording in 24 hours, realize that repair based on condition of component improves power supply reliability greatly; The data of collecting have contrast, have levels, can determine each contact, take-off point and end.The cable operation information is delivered to Surveillance center and is analyzed, confirms, thereby can fast automatic location defect or fault section, greatly reduces trouble shooting time.The collection of current collection cable operation information, monitoring and line fault are orientated as all over the body automatically, have solved the deficiency that existing simple function product exists, and have saved greatly resource, have improved operational efficiency.
Description of drawings
Fig. 1 is hardware principle block diagram of the present invention.
Fig. 2 is the cross-sectional view of information sensor assembly.
Fig. 3 is the external structure schematic diagram of information sensor assembly.
Fig. 4 is the circuit theory diagrams of voltage signal acquisition circuit.
Fig. 5 is the circuit theory diagrams of current signal Acquisition Circuit.
Fig. 6 is software realization flow figure of the present invention.
In Fig. 2-3, the 1st, permalloy magnetic core, the 2nd, loop sleeve, the 3rd, electric current inductive coil, 4 temperature sensors, the 5th, heat conduction silica gel pad, the 6th, voltage of electric field sensing chip, the 7th, shell, the 8th, lock-screw, the 9th, belt siliconized plate, the 10th, link, the 11st, set nut, the 12nd, nylon bandage, the 13rd, output cable.
In Fig. 5, W1 is that voltage stabilizing diode, C1-C3 are that filter capacitor, R1-R2 are that resistance, D1 are that diode, D2 are commutation diode.
In Fig. 6, W2 is that voltage stabilizing diode, D3-D4 are that diode, R3-R5 are that resistance, C4-C5 are that electric capacity, K are integrated operational amplifier.
Embodiment
Embodiment 1(sees Fig. 1-5) the present embodiment 1 comprises that information sensor assembly, information acquisition terminal, data management repeater, Surveillance center and scene patrol and examine terminal;
Described information acquisition terminal is comprised of voltage signal acquisition circuit, current signal Acquisition Circuit, analog switch, the first arm processor, the first radio receiving transmitting module; Described voltage signal acquisition circuit is connected output terminal and is connected with the respective input of analog switch respectively with the current signal Acquisition Circuit; The output terminal of described analog switch is connected with the respective input of the first arm processor; Described the first arm processor is connected with the first radio receiving transmitting module is two-way by the UART agreement, and the I/O synchronizing pulse interface of the first arm processor connects the corresponding controling end of described analog switch simultaneously;
The voltage of described information sensor assembly, electric current and temperature information be connected output terminal respectively the input end by shielded cable and described voltage signal acquisition circuit, current signal Acquisition Circuit input end be connected the respective input of arm processor and be connected;
Described data management repeater during by the GPS school module, a GPRS module, the second arm processor form; Module is two-way during with the GPS school is connected by the UART agreement for described the second arm processor, and the second arm processor is connected by the UART agreement is two-way with the first arm processor, and the second arm processor passes through the UART agreement and the one the GPRS module is two-way is connected;
Described Surveillance center comprises WEB server, database server and the 2nd GPRS module; Described database server is connected with the WEB server is two-way; Database server by the UART agreement with the 2nd the GPRS module is two-way is connected; Described the 2nd GPRS module and GPRS module wireless connections;
Described scene is patrolled and examined terminal and is comprised of mobile PCs, the second radio receiving transmitting module; Described mobile PCs is connected with the WEB server is two-way by the Internet network; Mobile PCs is connected with the second radio receiving transmitting module is two-way, the second radio receiving transmitting module and the first radio receiving transmitting module wireless connections.
Described information sensor assembly is comprised of shell 7, permalloy magnetic core 1, electric current inductive coil 3, voltage of electric field sensing chip 6, temperature sensor 4 and belt siliconized plate 9; Described permalloy magnetic core 1 is arranged in shell 7, and the left and right sides wall of shell 7 is stretched out respectively at its two ends, and permalloy magnetic core 1 left end is provided with external thread, and right-hand member extend in the left end hole of the link 10 that is fixed on shell 7 outer right wall; Link 10 is provided with vertical slotted eye, and link is provided with internal thread in the 10 right-hand member holes; Described belt siliconized plate 9 extend in the described vertical slotted eye, and fixing with lock-screw 8; The left end of belt siliconized plate 9 is enclosed within on the permalloy magnetic core 1, and fixing by set nut 11, and the loop sleeve 2 of electric current inductive coil 3 is arranged at permalloy magnetic core 1 cover; Between loop sleeve 2 and shell 7 right side inwalls, be provided with and be enclosed within voltage of electric field sensing chip 6 on the permalloy magnetic core 1; Described temperature sensor 4 is contained in the hole of housing bottom of shell 7, is stained with heat conduction silica gel pad 5 in the bottom of housing 7.
Described voltage signal acquisition circuit is comprised of isolation protective circuit, current rectifying and wave filtering circuit and bleeder circuit;
Described isolation protective circuit is comprised of voltage stabilizing diode W1, filter capacitor C1 and diode D1; The positive pole of described voltage stabilizing diode W1 links to each other with the output terminal of the voltage of information sensor assembly, the minus earth of voltage stabilizing diode W1; Described filter capacitor C1 is in parallel with voltage stabilizing diode W1; Described diode D1 negative pole links to each other the plus earth of diode D1 with the positive pole of stabilivolt W1;
Described current rectifying and wave filtering circuit is comprised of commutation diode D2 and filter capacitor C2; The positive pole of described commutation diode D2 links to each other with the output terminal of the voltage of information sensor assembly, and the negative pole of commutation diode D2 is through filter capacitor C2 ground connection;
Described bleeder circuit is comprised of resistance R 1-R2 and capacitor C 3; Described resistance R 1-R2 forms the series connection bleeder circuit and is connected between the node and ground of commutation diode D2 and filter capacitor C2; Described filter capacitor C3 is in parallel with resistance R 2;
Described current signal Acquisition Circuit is comprised of holding circuit and amplifying circuit; Described holding circuit is comprised of diode D3-D4 and voltage stabilizing diode W2; The plus earth of described diode D3, the negative pole of diode D3 connects the current output terminal of information sensor assembly; The positive pole of described diode D4 connects the current output terminal of information sensor assembly, the minus earth of diode D4; The positive pole of described voltage stabilizing diode W2 links to each other with the negative pole of diode D3, the minus earth of zener diode W2;
Described amplifying circuit is comprised of capacitor C 4-C5, resistance R 3-R5 and integrated operational amplifier K; The inverting input of described integrated operational amplifier K is connected on the current output terminal of information sensor assembly through resistance R 3; The in-phase input end of integrated operational amplifier K is through resistance R 4 ground connection; Described capacitor C 4 is connected between the node and ground of inverting input of resistance R 3 and integrated operational amplifier K; Described capacitor C 2 and resistance R 5 also are connected between the inverting input and analog switch respective input of integrated operational amplifier K;
The model of described analog switch is SGM4717; The model of described first, second radio receiving transmitting module is NRF240; The model of described first, second GPRS module is H7210; The model of module is NEO-5 during described GPS school; The model of described the first arm processor and the second arm processor is all STM320F103.
The principle of work of information sensor assembly:
The information sensor assembly adopts the bandage type structure, is fixed on the cable by nylon bandage 12.During high-tension cable work, the information sensor assembly is sensed the temperature of cable by temperature sensor 4; By electric current, belt siliconized plate 9 is enclosed within the cable outside and permalloy magnetic core 1 consists of the primary circuit in cable, forms magnetic field in the magnetic circuit of belt siliconized plate 9 and permalloy magnetic core 1 formation, induces electric current at secondary coil 3; Simultaneously produce electromotive force between cable and the earth, the voltage that voltage of electric field sensing chip 6 is enclosed within induction on the permalloy magnetic core 1 is exactly that cable is to the electromotive force of the earth.
The information sensor assembly adopts nylon bandage 12, polypropylene insulation housing 7, epoxy resin encapsulated, more than 5 kind of insulating method of insulating heat-conductive silica gel pad, and the isolated high-voltage side is reliable again safely fully; The information sensor assembly adopts the cylindric high magnetic permeability permalloy of the 1J90 magnetic core 1 of DW470-50 cold rolling non-orientation belt siliconized plate 9, diameter 6mm and the coil 3 of 10000 circles to consist of the mutual inductor structure; Adopt 18B20 integrated digital temperature sensor 4 as temp probe.
This cable operation information monitoring system is the integrated system of sensor technology, signal sampling technology, embedded technology, wireless network communication technique, computer network and Internet technology.
Possesses temperature, electric current, the information sensor assembly of electric field induction sensor is with the temperature of the cable sensed, curent change, the signals such as electric field change send information acquisition terminal to, under the sequential benchmark of the information acquisition terminal accurate I/O synchronizing pulse that module provides when the GPS school of data management repeater by voltage, the current signal Acquisition Circuit is carried out digitized processing to signal, through the first arm processor the discretize of each signal is processed again and identified according to the intellectuality of informix criterion, the processing of the information such as judgement, up-to-date information is passed to the data management repeater, the second arm processor of data management repeater is with the data preparation of each link information acquisition terminal, after analyzing pre-service, be transferred to Surveillance center by a GPRS module, the earth fault warning message that Surveillance center transmits each remote information acquisition terminal comprises time information according to it and carries out the timesharing location, comprehensive stable state information and transient information carry out segmentation according to the topology distribution position again, realize cable earth fault realization time sharing segment location.Surveillance center is also according to remote equipment topology information and the management of business demand realization event and decision-making treatment.
Be installed in the application software that on-site wireless cruising inspection system on the mobile PCs is based on windows platform, the on-site wireless cruising inspection system is by the second radio receiving transmitting module that is placed on mobile PCs and each information acquisition terminal swap data of patrolling and examining in the scope, information acquisition terminal is integrated the first radio receiving transmitting module, parameter setting, the historical data that information acquisition terminal receives the on-site wireless cruising inspection system such as copies and accepts at the order, and corresponding data is fed back to the on-site wireless cruising inspection system.
Embodiment 2(sees Fig. 6) a kind of implementation method of cable operation information monitoring system, it is characterized in that step is as follows:
(1) initialization;
(2) the first arm processor of described information acquisition terminal reads respectively changing value △ T, the △ I of temperature, electric current, voltage, the total data of △ U;
(3) judge whether temperature variation △ T surpasses default alarm threshold value; If △ T surpasses default alarm threshold value, enter (3-1) step; Otherwise went to for (4) step;
(3-1) described information acquisition terminal output alarm information exchange is crossed UART communication protocol and is passed to the data management repeater; Pass to Surveillance center by described first, second GPRS module again;
(4) judge whether super ground connection limit value is whether circuit singlephase earth fault occurs to voltage variety △ U; If △ U surpasses the ground connection limit value, enter (4-1) step; Otherwise went to for (5) step;
The extracting data steady-state current that (4-1) reads from the first arm processor of described information acquisition terminal enters respectively (4-1-1) step and (4-1-3) goes on foot; Go out transient current from the extracting data that reads simultaneously, enter (4-1-2) step;
(4-1-1) choose the steady-state current signal of a cycle after the fault; Utilize fft algorithm to extract the real component of electric current;
(4-1-1-1) judge that real component is with respect to total current value proportion x
1
(4-1-1-2) provide fault measurement by following formula: (lgx
1+ 3.7)/2; Enter (4-2) step;
(4-1-2) polarity of comparison transient current and voltage;
(4-1-2-1) utilize first half-wave method polarity to do criterion;
(4-1-2-2) calculate fault measurement, design conditions are as follows:
A, voltage of electric field are undergone mutation, and △ V bust is greater than 50%, and then fault measurement is 0.5;
B, transient current and polarity of voltage are opposite, and then fault measurement is 0.5;
Fault measurement is the fault measurement sum of a, b two design conditions; Enter (4-2) step;
(4-1-3) choose the steady-state current signal of a cycle after the fault; Utilize fft algorithm to extract electric current quintuple harmonics component;
(4-1-3-1) judge that the quintuple harmonics component is with respect to total current value proportion x
2
(4-1-3-2) provide fault measurement by following formula: (lgx
2+ 4.6)/3; Enter (4-2) step;
(4-2) three kinds of fault measurements are averaged, obtain the fault measurement result, fault measurement mean value is judged to be fault and determines to occur greater than 0.6, enters (4-3) step; Otherwise be uncertain;
(4-3) the record moment and output alarm information;
(5) judge whether ultrashort road limit value of △ I; If the ultrashort road of △ I limit value enters (5-1) step; Otherwise go to (2) step.
(5-1) carry out timing and judge, the time is to entering (5-2) step;
(5-2) reach timing, short-circuit alarming.
Claims (6)
1. cable operation information monitoring system is characterized in that comprising that information sensor assembly, information acquisition terminal, data management repeater, Surveillance center and scene patrol and examine terminal;
Described information acquisition terminal is comprised of voltage signal acquisition circuit, current signal Acquisition Circuit, analog switch, the first arm processor, the first radio receiving transmitting module; Described voltage signal acquisition circuit is connected output terminal and is connected with the respective input of analog switch respectively with the current signal Acquisition Circuit; The output terminal of described analog switch is connected with the respective input of the first arm processor; Described the first arm processor is connected with the first radio receiving transmitting module is two-way by the UART agreement, and the I/O synchronizing pulse interface of the first arm processor connects the corresponding controling end of described analog switch simultaneously;
The voltage of described information sensor assembly, electric current and temperature information be connected output terminal respectively the input end by shielded cable and described voltage signal acquisition circuit, current signal Acquisition Circuit input end be connected the respective input of arm processor and be connected;
Described data management repeater during by the GPS school module, a GPRS module, the second arm processor form; Module is two-way during with the GPS school is connected by the UART agreement for described the second arm processor, and the second arm processor is connected by the UART agreement is two-way with the first arm processor, and the second arm processor passes through the UART agreement and the one the GPRS module is two-way is connected;
Described Surveillance center comprises WEB server, database server and the 2nd GPRS module; Described database server is connected with the WEB server is two-way; Database server by the UART agreement with the 2nd the GPRS module is two-way is connected; Described the 2nd GPRS module and GPRS module wireless connections;
Described scene is patrolled and examined terminal and is comprised of mobile PCs, the second radio receiving transmitting module; Described mobile PCs is connected with the WEB server is two-way by the Internet network; Mobile PCs is connected with the second radio receiving transmitting module is two-way, the second radio receiving transmitting module and the first radio receiving transmitting module wireless connections.
2. cable operation information monitoring system according to claim 1 is characterized in that described information sensor assembly is comprised of shell (7), permalloy magnetic core (1), electric current inductive coil (3), voltage of electric field sensing chip (6), temperature sensor (4) and belt siliconized plate (9); Described permalloy magnetic core (1) is arranged in shell (7), the left and right sides wall of shell (7) is stretched out respectively at its two ends, permalloy magnetic core (1) left end is provided with external thread, and right-hand member extend in the left end hole of the link (10) that is fixed on shell (7) outer right wall; Link (10) is provided with vertical slotted eye, and link (10) is provided with internal thread in the right-hand member hole; Described belt siliconized plate (9) extend in the described vertical slotted eye, and fixing with lock-screw (8); The left end of belt siliconized plate (9) is enclosed within on the permalloy magnetic core (1), and fixing by set nut (11), and the loop sleeve (2) of electric current inductive coil (3) is arranged at permalloy magnetic core (1) cover; Between loop sleeve (2) and shell (7) right side inwall, be provided with and be enclosed within the upper voltage of electric field sensing chip (6) of permalloy magnetic core (1); Described temperature sensor (4) is contained in the hole of housing bottom of shell (7), is stained with heat conduction silica gel pad (5) in the bottom of housing (7).
3. cable operation information monitoring system according to claim 1 is characterized in that
Described voltage signal acquisition circuit is comprised of isolation protective circuit, current rectifying and wave filtering circuit and bleeder circuit;
Described isolation protective circuit is comprised of voltage stabilizing diode W1, filter capacitor C1 and diode D1; The positive pole of described voltage stabilizing diode W1 links to each other with the output terminal of the voltage of information sensor assembly, the minus earth of voltage stabilizing diode W1; Described filter capacitor C1 is in parallel with voltage stabilizing diode W1; Described diode D1 negative pole links to each other the plus earth of diode D1 with the positive pole of stabilivolt W1;
Described current rectifying and wave filtering circuit is comprised of commutation diode D2 and filter capacitor C2; The positive pole of described commutation diode D2 links to each other with the output terminal of the voltage of information sensor assembly, and the negative pole of commutation diode D2 is through filter capacitor C2 ground connection;
Described bleeder circuit is comprised of resistance R 1-R2 and capacitor C 3; Described resistance R 1-R2 forms the series connection bleeder circuit and is connected between the node and ground of commutation diode D2 and filter capacitor C2; Described filter capacitor C3 is in parallel with resistance R 2.
4. cable operation information monitoring system according to claim 1 is characterized in that described current signal Acquisition Circuit is comprised of holding circuit and amplifying circuit; Described holding circuit is comprised of diode D3-D4 and voltage stabilizing diode W2; The plus earth of described diode D3, the negative pole of diode D3 connects the current output terminal of information sensor assembly; The positive pole of described diode D4 connects the current output terminal of information sensor assembly, the minus earth of diode D4; The positive pole of described voltage stabilizing diode W2 links to each other with the negative pole of diode D3, the minus earth of zener diode W2;
Described amplifying circuit is comprised of capacitor C 4-C5, resistance R 3-R5 and integrated operational amplifier K; The inverting input of described integrated operational amplifier K is connected on the current output terminal of information sensor assembly through resistance R 3; The in-phase input end of integrated operational amplifier K is through resistance R 4 ground connection; Described capacitor C 4 is connected between the node and ground of inverting input of resistance R 3 and integrated operational amplifier K; Described capacitor C 2 and resistance R 5 also are connected between the inverting input and analog switch respective input of integrated operational amplifier K.
5. cable operation information monitoring system according to claim 1, the model that it is characterized in that described analog switch is SGM4717; The model of described first, second radio receiving transmitting module is NRF240; The model of described first, second GPRS module is H7210; The model of module is NEO-5 during described GPS school; The model of described the first arm processor and the second arm processor is all STM320F103.
6. the implementation method of a cable operation information monitoring system according to claim 1 is characterized in that step is as follows:
(1) initialization;
(2) the first arm processor of described information acquisition terminal reads respectively changing value △ T, the △ I of temperature, electric current, voltage, the total data of △ U;
(3) judge whether temperature variation △ T surpasses default alarm threshold value; If △ T surpasses default alarm threshold value, enter (3-1) step; Otherwise went to for (4) step;
(3-1) described information acquisition terminal output alarm information exchange is crossed UART communication protocol and is passed to the data management repeater; Pass to Surveillance center by described first, second GPRS module again;
(4) judge whether super ground connection limit value is whether circuit singlephase earth fault occurs to voltage variety △ U; If △ U surpasses the ground connection limit value, enter (4-1) step; Otherwise went to for (5) step;
The extracting data steady-state current that (4-1) reads from the first arm processor of described information acquisition terminal enters respectively (4-1-1) step and (4-1-3) goes on foot; Go out transient current from the extracting data that reads simultaneously, enter (4-1-2) step;
(4-1-1) choose the steady-state current signal of a cycle after the fault; Utilize fft algorithm to extract the real component of electric current;
(4-1-1-1) judge that real component is with respect to total current value proportion x
1
(4-1-1-2) provide fault measurement by following formula: (lgx
1+ 3.7)/2; Enter (4-2) step;
(4-1-2) polarity of comparison transient current and voltage;
(4-1-2-1) utilize first half-wave method polarity to do criterion;
(4-1-2-2) calculate fault measurement, design conditions are as follows:
A, voltage of electric field are undergone mutation, and △ V bust is greater than 50%, and then fault measurement is 0.5;
B, transient current and polarity of voltage are opposite, and then fault measurement is 0.5;
Fault measurement is the fault measurement sum of a, b two design conditions; Enter (4-2) step;
(4-1-3) choose the steady-state current signal of a cycle after the fault; Utilize fft algorithm to extract electric current quintuple harmonics component;
(4-1-3-1) judge that the quintuple harmonics component is with respect to total current value proportion x
2
(4-1-3-2) provide fault measurement by following formula: (lgx
2+ 4.6)/3; Enter (4-2) step;
(4-2) three kinds of fault measurements are averaged, obtain the fault measurement result, fault measurement mean value is judged to be fault and determines to occur greater than 0.6, enters (4-3) step; Otherwise be uncertain;
(4-3) the record moment and output alarm information;
(5) judge whether ultrashort road limit value of △ I; If the ultrashort road of △ I limit value enters (5-1) step; Otherwise go to (2) step;
(5-1) carry out timing and judge, the time is to entering (5-2) step;
(5-2) reach timing, short-circuit alarming.
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