CN102043114A - Electrification loop-breaking method for direct current power supply and special device thereof - Google Patents
Electrification loop-breaking method for direct current power supply and special device thereof Download PDFInfo
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Abstract
The invention discloses an electrification loop-breaking method for a direct current power supply and a special device thereof. The electrification loop-breaking method is characterized in that: the direct current power supply is subjected to loop detection by the special device which is provided with a host signal source (1), a handheld device (2) and a pliers-type mutual inductor; the host signal source (1) detects whether a loop network fault exists in a direct current power supply system by using a table tennis principle, and injects an alternating current signal with micro-current and low power into the direct current power supply system when determining that the loop network fault exists, namely loop network branches exist, wherein a voltage effective value of the alternating signal is less than or equal to 10V; and the handheld device (2) inducts the signal current of power supply branches of the direct current power supply system through the pliers-type mutual inductor, computes and judges conditions and a direction of a loop network, and displays the conditions and the direction of the loop network through a real-time signal waveform so as to judge the conditions of the loop network. The electrification loop-breaking method ensures that various loop power supply branches can be rapidly and accurately searched, is easy to operate, convenient and practical, is a safe and effective loop-breaking means for a large number of power generation and power supply enterprises, and effectively improves the safety stability of a power direct current system.
Description
Technical field
The present invention relates to charged method and the isolated plant thereof of unlinking of a kind of direct supply, be applicable to that the ring network fault of electric power DC system detects.The fault test set technical field that belongs to electric power DC system.
Background technology
The electric power DC control supply is to provide working power to opertaing devices such as relay protections, is further to improve power supply reliability, and the above transformer station of generalized case 220kV grade all adopts 2 cover DC power supply, have in addition the 110kV station also adopt 2 to overlap power supplys.The generating plant mostly also is to adopt this dual power supply mode because equipment is more.
Important load provides dc feeder by two cover power supplys respectively, opens by sky, can select a wherein cover power supply power supply arbitrarily, female switch is set in the middle of two sections buses, when wherein a charging device that overlaps or accumulator etc. break down, available another set of power devices, power supply reliability improves greatly.
In the newly-built or scrap build work progress; because distribution mistake; the phenomenon that two cover straight-flow system paired runnings often occur; although state's net, southern net expressly provide that all two cover direct supplys can not paired running; but the user does not have means to untie and contact, worries to separate the also process of contact yet, protection malfunction or tripping occur; all be unwilling or hesitate to unlink, cause still having now the long-term paired running of many transformer station's 2 cover straight-flow system power supplys.
In general, two cover power supply paired runnings will bring many hidden danger to security of system is stable, specifically endanger as follows:
(1) any cover direct supply generation earth fault will make all ground connection of full station power supply;
(2) Earth Fault Detection sensitivity descends;
(3) one point earth takes place, the probability of protection malfunction increases;
(4) one cover accumulators may not have floating current;
(5) one cover overcharge of a batteries, another set of owing charged;
(6) one cover charging set load currents are excessive, another set of less than normal;
Behindhand battery occurs in (7) the one cover accumulators, be easy to another set of accumulator is also worn down.
Therefore, press for to vast generating and power supply enterprise provide the safe and effective means of unlinking, and develop corresponding isolated plant, will have paired running 2 cover direct supplys as early as possible now, divide open shop, improve the security and stability of electric power DC system.
Summary of the invention
First purpose of the present invention is in order to solve the problem of prior art electric power DC system security presence hidden danger, a kind of charged method of unlinking of direct supply that can improve the security and stability of electric power DC system effectively to be provided.
Second purpose of the present invention is in order to provide a kind of direct supply the charged isolated plant that unlinks.
First purpose of the present invention can be achieved through the following technical solutions:
The charged method of unlinking of direct supply is characterized in that: utilize the isolated plant that has host signal source, hander and pincers type mutual inductor that direct supply is carried out loop detection, may further comprise the steps:
1) whether the host signal source exists ring network fault with table tennis principle measurement DC power system, after confirming that promptly there is characteristic of loop branches in ring network fault, DC power system is injected a little electric current, lower powered AC signal, and the voltage effective value of this AC signal is no more than 10V;
2) looped network situation data and the signal data that will test of host signal source sends to hander;
3) hander calculates and judgement looped network situation and direction by the marking current of each power branch of the transformer induced DC power system of pincers type, and shows by the live signal waveform, to judge the looped network situation; When the waveform that shows is standard sine wave or irregular waveform, judge that detected branch road is that characteristic of loop branches, DC power system exist ring network fault; When the waveform that shows is the straight line waveform, judge that detected branch road is normal branch road, there is not ring network fault in DC power system when all being shown as the straight line waveform as if whole detection branch.
First purpose of the present invention can also be achieved through the following technical solutions:
A kind of embodiment that realizes the present invention's first purpose is: be provided with the balance bridge of 100K or 50K in the host signal source, be used to guarantee DC power system voltage-to-ground balance; Perhaps be provided with the switching bridge of table tennis principle, be used to measure the ground connection situation of DC power system; Be provided with in the host signal source being provided with the input coefficient ground capacitance in the host signal source, be used for the fluctuation of control signal electric current, can alleviate the electric capacity input the DC power system rush of current of moment; The host signal source can be selected sine wave signal is dropped on the positive pole or negative pole of direct supply according to the system earth situation, the change in voltage that can buffering signals drops into moment, also be used for controlling the output effective value of sine wave signal, the attenuation that is used to gather sine wave signal.
A kind of embodiment that realizes the present invention's first purpose is: when detecting the direct supply looped network, red lead is inserted host signal source " positive pole " terminal, and link to each other with straight-flow system "+KM ", the black lead is inserted host signal source " negative pole " terminal, and link to each other with straight-flow system " KM ", with yellow lead insert the host signal source " " terminal, and link to each other with straight-flow system " ground connection copper bar ", measure straight-flow system ground capacitance and both positive and negative polarity resistance to earth and busbar voltage by the host signal source, and produce a sine wave signal; Looped network situation data and signal data that the host signal source is detected send to hander, and hander receives data by wireless communication module; The signal that hander is responded to each power branch by forcipated mutual-inductor calculates and judges the looped network situation, and demonstrates the live signal waveform of looped network situation by LCD MODULE.
A kind of embodiment that realizes the present invention's first purpose is: by wiring with search loop fault two aspects:
The first, wiring
1) respectively inserts resistance R 2=50k Ω over the ground at II section bus both positive and negative polarity, be equipped with 50k Ω balance bridge at random;
2) resistance box that will be equipped with at random is connected across the negative pole of I, II section bus, disconnects bus connection switch again;
3) the red lead of " positive pole " terminal in access host signal source 1 is clipped in the battery positive voltage insurance; Insert the black lead of " negative pole " terminal in host signal source 1, be clipped in the battery terminal negative insurance; Insert host signal source 1 " " the yellow lead of terminal, be clipped on the ground connection copper bar;
The second, search ring network fault
1) instrument self checking: in the #1 position, pincers type mutual inductor is clamped the yellow ground wire in host signal source 1, and make the demonstration arrow points host signal source 1 in the hander, by " self-correcting " key " instrument is normal ", show that equipment work is normal again.Otherwise, change the jaw that battery maybe need clean pincers type mutual inductor;
2) looped network detects: in #2,3,4,5 positions, vise the both positive and negative polarity cable of each feeder line respectively, carry out the detection of branch road ground connection, clamp # 2 and will report no looped network pincers, to #3 newspaper is had looped network, continue to search toward load direction along this branch road, #4 has looped network, #5 reports no looped network, shows that the ring network fault point is between #3 and #4;
3) many branch roads detect simultaneously: in the #4 position, can vise many feeder lines simultaneously, as retribution looped network be arranged, perhaps have the looped network waveform to show, showing in the middle of the feeder line that is vised has characteristic of loop branches, can use 2 point-scores again, finds out concrete characteristic of loop branches; Not having ground connection or hander waveform as retribution is shown as straight line and shows that this feeder line does not all have ring network fault, can accelerate the looped network seek rate.
A kind of embodiment that realizes the present invention's first purpose is: by the 3rd) go on foot the voltage that described forcipated mutual-inductor is sensed, amplify through the two-stage calculation amplifying circuit, deliver to the single-chip processor i/o port and carry out the AD sampling.
Second purpose of the present invention can be achieved through the following technical solutions:
The charged isolated plant that unlinks of direct supply is made of host signal source and hander, it is characterized in that:
1) described host signal source comprises host computer chip CPU, control circuit, host test circuit, main frame wireless communication module, main frame LCD MODULE, discharge module; Described host computer chip CPU is connected with the I/O end of host test circuit, main frame wireless communication module, main frame LCD MODULE, discharge module respectively by the I/O port;
2) described hander comprises Hand Personal Computer chip CPU, forcipated mutual-inductor, hand-held wireless communication module, handheld test circuit and hand-held LCD MODULE; Described Hand Personal Computer chip CPU is connected with the I/O end of hand-held wireless communication module, handheld test circuit and hand-held LCD MODULE respectively by the I/O port, and described forcipated mutual-inductor is connected on the handheld test circuit.
A kind of embodiment that realizes the present invention's second purpose is: the effective value of output signal fluctuation is controlled in 10V by control circuit in described host signal source.
A kind of embodiment that realizes the present invention's second purpose is: described host computer chip CPU and Hand Personal Computer chip CPU are made of 12 AD single-chip microcomputers of a slice and peripheral resistance, electric capacity and oscillatory circuit respectively; Described oscillatory circuit is made of the high-precision temperature compensating crystal oscillator of 8M.
A kind of embodiment that realizes the present invention's second purpose is: the coverage of the main frame wireless communication module in described host signal source and the hand-held wireless communication module of described hander is 300 meters.
A kind of embodiment that realizes the present invention's second purpose is: the main frame LCD MODULE in described host signal source and the hand-held LCD MODULE of described hander are made of the 240*160 matrix liquid-crystal display screen respectively.
The present invention has following outstanding beneficial effect:
The present invention is because utilization has the host signal source, the isolated plant of hander and pincers type mutual inductor carries out loop detection to direct supply, hander is with communication swap data and information between the host signal source, measure DC power system by the host signal source and whether have ring network fault, give power-supply system by injecting low current signal, thereby will detect data and send to hander, hander is by the marking current of each power branch of the transformer induced DC power system of pincers type, calculate and judgement looped network situation and direction, and by the demonstration of live signal waveform, to judge that the present invention of looped network situation can be quick, find out various loop service branch roads exactly.Therefore, have simple, convenient and practical and beneficial effect safely and effectively,, can have paired running two cover direct supplys now for vast generating and power supply enterprise provide the safe and effective means of unlinking, divide open shop, improved the security and stability of electric power DC system effectively.
Description of drawings
Fig. 1 is the structured flowchart of isolated plant of the present invention.
Fig. 2 is the control circuit figure in host signal of the present invention source.
Fig. 3 is the schematic diagram that the marking current in host signal of the present invention source enters direct supply.
Fig. 4 is the marking current testing circuit figure of hander of the present invention.
Fig. 5 is the synoptic diagram of isolated plant user mode of the present invention.
Embodiment
Specific embodiment 1:
Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5 constitute a specific embodiment of isolated plant of the present invention.
With reference to Fig. 1, the isolated plant of present embodiment is by being made of host signal source 1 and hander 2, and described host signal source 1 comprises host computer chip CPU11, control circuit 12, host test circuit 13, main frame wireless communication module 14, main frame LCD MODULE 15, discharge module 16; Described host computer chip CPU11 is connected with the I/O end of host test circuit 13, main frame wireless communication module 14, main frame LCD MODULE 15, discharge module 16 respectively by the I/O port; Described hander 2 comprises Hand Personal Computer chip CPU21, forcipated mutual-inductor 22, hand-held wireless communication module 23, handheld test circuit 24 and hand-held LCD MODULE 25; Described Hand Personal Computer chip CPU21 is connected with the I/O end of hand-held wireless communication module 23, handheld test circuit 24 and hand-held LCD MODULE 25 respectively by the I/O port, and described forcipated mutual-inductor 22 is connected on the handheld test circuit 24.
In the present embodiment: the effective value of output signals fluctuation is controlled in 10V by control circuit 12 in described host signal source 1.Described host computer chip CPU11 and Hand Personal Computer chip CPU21 are made of 12 AD single-chip microcomputers of a slice and peripheral resistance, electric capacity and oscillatory circuit respectively.Described oscillatory circuit is made of the high-precision temperature compensating crystal oscillator of 8M.The coverage of the main frame wireless communication module 14 in described host signal source 1 and the hand-held wireless communication module 23 of described hander 2 is 300 meters.The main frame LCD MODULE 15 in described host signal source 1 and the hand-held LCD MODULE 25 of described hander 2 are made of the 240*160 matrix liquid-crystal display screen respectively.
With reference to Fig. 2, in the host signal source 1, control circuit J1, J2, J3, J4 can constitute the balance bridge of 100K or 50K, are used to guarantee power supply voltage-to-ground balance; Also can be used as the switching bridge of table tennis principle, be used to measure the ground connection situation of power supply.J5, J6, J7, J8 are used for power supply input coefficient ground capacitance is used for the fluctuation of control signal electric current, and R5 and R6 can be alleviated the rush of current of moment in capacitor C 1 input coefficient.
With reference to Fig. 3, signal output apparatus J1, J2 select sine wave signal is dropped on the positive pole or negative pole of direct supply according to the system earth situation, R4, R5 can buffering signals drop into the change in voltage of moment, also be used for controlling the output effective value of sine wave signal, R3 is used to gather the attenuation of sine wave signal.
With reference to Fig. 4, in the hander 2, the marking current sample circuit is 2 grades of discharge circuits, described amplifier is an AD8552 binary channels high precision operating amplifier, for guaranteeing output signal not by saturated and end, two-stage is amplified all to have added and is raised level, and the wherein partial level of raising is that software is regulated automatically.Hander 2 has unique waveform Presentation Function, can judge the looped network situation of current branch road according to real-time waveform.
Adopt the charged method of unlinking of direct supply of the isolated plant of present embodiment may further comprise the steps:
1) host signal source 1 is when detecting the direct supply looped network, red lead is inserted host signal source 1 " positive pole " terminal, and link to each other with straight-flow system "+KM ", the black lead is inserted host signal source 1 " negative pole " terminal, and link to each other with straight-flow system " KM ", with yellow lead insert host signal source 1 " " terminal, and link to each other with straight-flow system " ground connection copper bar ", straight-flow system ground capacitance and both positive and negative polarity resistance to earth and busbar voltage can be measured in host signal source 1, and produce a sine wave signal;
2) with the 1st) host signal source 1 the looped network situation data and the signal data that are detected send to hander 2 by wireless communication module 14 in the step, and hander 2 receives data by wireless communication module 23;
3) hander 2) signal by each power branch of forcipated mutual-inductor 22 induction calculates and judges the looped network situation, and demonstrate the live signal waveform of looped network situation by LCD MODULE 25.
Wherein, the 1st) the sine wave signal size described in the step is by the restriction of ground connection situation, and its voltage effective value is no more than 10V; The 3rd) voltage sensed of described forcipated mutual-inductor 22 is amplified by the two-stage calculation amplifying circuit step, delivers to the single-chip processor i/o port and carries out the AD sampling.
In the present embodiment, described host signal source 1 is by the control of software to control circuit 12, and the effective value that makes the output signal fluctuation is in 10V; The CPU 11 in described host signal source 1 and the CPU 21 of described hander 2 adopt 12 AD single-chip microcomputers; What the CPU 11 in described host signal source 1 and the CPU of described hander 2 21 were used all is the high-precision temperature compensating crystal oscillator of 8M; The coverage of the wireless communication module 14 in described host signal source 1 and the wireless communication module 23 of described hander 2 is 300 meters; The LCD MODULE 15 in described host signal source 1 and the LCD MODULE 25 of described hander 2 all are the 240*160 matrix liquid-crystal display screen.
The function of present embodiment: (1) detects the ground connection situation of direct supply; (2) drop into balance bridge for the direct supply that lacks balance bridge; (3) help to search the straight-flow system ring network fault.
The using method of isolated plant of the present invention:
With reference to Fig. 5, wiring requires as follows:
1) respectively inserts resistance R 2=50k Ω over the ground at II section bus both positive and negative polarity, be equipped with 50k Ω balance bridge at random;
2) resistance box that will be equipped with at random is connected across the negative pole of I, II section bus, disconnects bus connection switch again;
3) insert the red lead of signal source " positive pole " terminal, be clipped in the battery positive voltage insurance, insert the black lead of signal source " negative pole " terminal, be clipped in the battery terminal negative insurance, insert signal source " " the yellow lead of terminal, be clipped on the ground connection copper bar.
Lookup method:
1) instrument self checking: in the #1 position, split-core type meter is clamped the yellow ground wire of signal source, and make the arrow points signal source in the split-core type meter, by " self-correcting " key " instrument is normal ", show that equipment work is normal again.Otherwise, change battery and maybe need clean jaw etc.
2) looped network detects: in #2,3,4,5 positions, vise the both positive and negative polarity cable of each feeder line respectively, carry out the detection of branch road ground connection, clamp #2 and will report no looped network pincers, to #3 newspaper is had looped network, continue to search toward load direction along this branch road, #4 has looped network, #5 reports no looped network, shows that the ring network fault point is between #3 and #4.
3) many branch roads detect simultaneously: in the #4 position, can vise many feeder lines simultaneously, as retribution looped network be arranged, perhaps have the looped network waveform to show, showing in the middle of the feeder line that is vised has characteristic of loop branches, can use 2 point-scores again, finds out concrete characteristic of loop branches.Not having ground connection or hander waveform as retribution is shown as straight line and shows that this feeder line does not all have ring network fault, can accelerate the looped network seek rate.
Application example analysis of the present invention:
In 220kV transformer station of Chinese Earthquake of Anyang station in Henan power supply administration.
Field condition: transformer station is after the system reform, and two sections busbar voltages are consistent always.No matter how to change wherein one section float charge voltage, the voltage of measuring two sections buses with multimeter is still the same.
Used the special-purpose charged instrument that unlinks of QDJ-01 type direct supply that system is carried out loop detection on October 15th, 2010, find that I section public observing and controlling cabinet of bus 102Z and the public observing and controlling cabinet of II section bus 212Z all have loop signals, check to the observing and controlling cabinet and to find the anodal of two sections buses and on a terminal, negative pole is not also, with two lines separately after, this loop has not had loop signals.Continuation is searched with QDJ-01 between the 205Z110kV circuit monitoring cabinet II, 216Z220kV circuit monitoring cabinet of 105Z110kV circuit monitoring cabinet II, 106Z220kV circuit monitoring cabinet and the II section bus of finding I section bus loop signals.Check to find all standby each other of two-way power supply, can only throw one the tunnel originally, but on-the-spot two-way all thrown, disconnected wherein on one side, this two-way is normal.But still there is loop in system, searching 217Z#1 main transformer monitoring cabinet, this two-way of 214Z110kV circuit monitoring cabinet I of finding I section bus 103Z#1 main transformer monitoring cabinet, 104Z110kV circuit monitoring cabinet I and II section bus more also is that the two-way power supply is standby each other, but on-the-spot two-way has all been thrown, and disconnects wherein one section.Detect once more, do not had articulating between two sections buses, loop is all removed.
Among other embodiment of the present invention, be provided with the balance bridge of 100K or 50K in the host signal source 1, be used to guarantee DC power system voltage-to-ground balance; Perhaps be provided with the switching bridge of table tennis principle, be used to measure the ground connection situation of DC power system; Be provided with in the host signal source 1 being provided with the input coefficient ground capacitance in the host signal source 1, be used for the fluctuation of control signal electric current, can alleviate the electric capacity input the DC power system rush of current of moment; Host signal source 1 can be selected sine wave signal is dropped on the positive pole or negative pole of direct supply according to the system earth situation, the change in voltage that can buffering signals drops into moment, also be used for controlling the output effective value of sine wave signal, the attenuation that is used to gather sine wave signal.
Conclusion:
A, with method of the present invention and the device can find out ring network fault rapidly and accurately.
B, signal voltage fluctuation is no more than 10V in operational process, has guaranteed security of system effectively.
C, the demonstration of liquid crystal waveform meet design requirement.
D, wireless communication designs meet design requirement.
Gordian technique of the present invention:
1, the DC power system resistance to earth is measured: 0-100K, relative error ± 5%.
2, direct supply branch road resistance to earth is measured: 0-100K, relative error ± 8%.
3, the signal voltage fluctuation is no more than 10V.
4, radio communication: 300 meters
5, satisfy the lattice lcd that clear waveform shows.
The present invention can find out various loop service branch roads fast and accurately, thereby helps to improve the power system safety and stability level.
Claims (10)
1. the charged method of unlinking of direct supply is characterized in that: utilize the isolated plant that has host signal source (1), hander (2) and pincers type mutual inductor that direct supply is carried out loop detection, may further comprise the steps:
1) whether host signal source (1) exists ring network fault with table tennis principle measurement DC power system, after confirming that promptly there is characteristic of loop branches in ring network fault, DC power system is injected a little electric current, lower powered AC signal, and the voltage effective value of this AC signal is no more than 10V;
2) host signal source (1) looped network situation data and the signal data that will test sends to hander (2);
3) hander (2) calculates and judgement looped network situation and direction by the marking current of each power branch of the transformer induced DC power system of pincers type, and shows by the live signal waveform, to judge the looped network situation; When the waveform that shows is standard sine wave or irregular waveform, judge that detected branch road is that characteristic of loop branches, DC power system exist ring network fault; When the waveform that shows is the straight line waveform, judge that detected branch road is normal branch road, there is not ring network fault in DC power system when all being shown as the straight line waveform as if whole detection branch.
2. the charged method of unlinking of direct supply according to claim 1 is characterized in that: be provided with the balance bridge of 100K or 50K in host signal source (1), be used to guarantee DC power system voltage-to-ground balance; Perhaps be provided with the switching bridge of table tennis principle, be used to measure the ground connection situation of DC power system; Be provided with being provided with the input coefficient ground capacitance in host signal source (1) in the host signal source (1), be used for the fluctuation of control signal electric current, can alleviate the electric capacity input the DC power system rush of current of moment; Host signal source (1) can be selected sine wave signal is dropped on the positive pole or negative pole of direct supply according to the system earth situation, the change in voltage that can buffering signals drops into moment, also be used for controlling the output effective value of sine wave signal, the attenuation that is used to gather sine wave signal.
3. the charged method of unlinking of direct supply according to claim 1 and 2, it is characterized in that: when detecting the direct supply looped network, red lead is inserted host signal source (1) " positive pole " terminal, and link to each other with straight-flow system "+KM ", the black lead is inserted host signal source (1) " negative pole " terminal, and link to each other with straight-flow system " KM ", with yellow lead insert host signal source (1) " " terminal, and link to each other with straight-flow system " ground connection copper bar ", measure straight-flow system ground capacitance and both positive and negative polarity resistance to earth and busbar voltage by host signal source (1), and produce a sine wave signal; Looped network situation data and signal data that host signal source (1) is detected send to hander (2), and hander (2) receives data by wireless communication module (23); The signal that hander (2) is responded to each power branch by forcipated mutual-inductor calculates and judges the looped network situation, and demonstrates the live signal waveform of looped network situation by LCD MODULE.
4. the charged method of unlinking of direct supply according to claim 1 and 2 is characterized in that: by wiring with search loop fault two aspects:
The first, wiring
1) respectively inserts resistance R 2=50k Ω over the ground at II section bus both positive and negative polarity, be equipped with 50k Ω balance bridge at random;
2) resistance box that will be equipped with at random is connected across the negative pole of I, II section bus, disconnects bus connection switch again;
3) the red lead of " positive pole " terminal in access host signal source 1 is clipped in the battery positive voltage insurance; Insert the black lead of " negative pole " terminal in host signal source 1, be clipped in the battery terminal negative insurance; Insert host signal source 1 " " the yellow lead of terminal, be clipped on the ground connection copper bar;
The second, search ring network fault
1) instrument self checking: in the #1 position, pincers type mutual inductor is clamped the yellow ground wire in host signal source 1, and make the demonstration arrow points host signal source 1 in the hander (2), by " self-correcting " key " instrument is normal ", show that equipment work is normal again.Otherwise, change the jaw that battery maybe need clean pincers type mutual inductor;
2) looped network detects: in #2,3,4,5 positions, vise the both positive and negative polarity cable of each feeder line respectively, carry out the detection of branch road ground connection, clamp #2 and will report no looped network pincers, to #3 newspaper is had looped network, continue to search toward load direction along this branch road, #4 has looped network, #5 reports no looped network, shows that the ring network fault point is between #3 and #4;
3) many branch roads detect simultaneously: in the #4 position, can vise many feeder lines simultaneously, as retribution looped network be arranged, perhaps have the looped network waveform to show, showing in the middle of the feeder line that is vised has characteristic of loop branches, can use 2 point-scores again, finds out concrete characteristic of loop branches; Not having ground connection or hander waveform as retribution is shown as straight line and shows that this feeder line does not all have ring network fault, can accelerate the looped network seek rate.
5. the charged method of unlinking of direct supply according to claim 1 and 2 is characterized in that: by the 3rd) go on foot the voltage that described forcipated mutual-inductor is sensed, amplify through the two-stage calculation amplifying circuit, deliver to the single-chip processor i/o port and carry out the AD sampling.
6. the charged isolated plant that unlinks of direct supply is made of host signal source (1) and hander (2), it is characterized in that:
1) described host signal source (1) comprises host computer chip CPU (11), control circuit (12), host test circuit (13), main frame wireless communication module (14), main frame LCD MODULE (15), discharge module (16); Described host computer chip CPU (11) is connected with the I/O end of host test circuit (13), main frame wireless communication module (14), main frame LCD MODULE (15), discharge module (16) respectively by the I/O port;
2) described hander (2) comprises Hand Personal Computer chip CPU (21), forcipated mutual-inductor (22), hand-held wireless communication module (23), handheld test circuit (24) and hand-held LCD MODULE (25); Described Hand Personal Computer chip CPU (21) is connected with hand-held wireless communication module (23), handheld test circuit (24) and the I/O end of hand-held LCD MODULE (25) respectively by the I/O port, and described forcipated mutual-inductor (22) is connected on the handheld test circuit (24).
7. the charged isolated plant that unlinks of direct supply according to claim 6 is characterized in that: the effective value of output signal fluctuation is controlled in 10V by control circuit (12) in described host signal source (1).
8. the charged isolated plant that unlinks of direct supply according to claim 6 is characterized in that: described host computer chip CPU (11) and Hand Personal Computer chip CPU (21) are made of 12 AD single-chip microcomputers of a slice and peripheral resistance, electric capacity and oscillatory circuit respectively; Described oscillatory circuit is made of the high-precision temperature compensating crystal oscillator of 8M.
9. the charged isolated plant that unlinks of direct supply according to claim 6 is characterized in that: the coverage of the main frame wireless communication module (14) in described host signal source (1) and the hand-held wireless communication module (23) of described hander (2) is 300 meters.
10. the charged isolated plant that unlinks of direct supply according to claim 6 is characterized in that: the main frame LCD MODULE (15) in described host signal source (1) and the hand-held LCD MODULE (25) of described hander (2) are made of the 240*160 matrix liquid-crystal display screen respectively.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646141A (en) * | 2017-02-28 | 2017-05-10 | 深圳市汇业达通讯技术有限公司 | Automatic detection method and system for direct current power supply bus loop closing |
| CN107064822A (en) * | 2017-01-04 | 2017-08-18 | 贵阳英纳瑞电气有限公司 | Two sections of direct currents of straight-flow system mutually alter monitoring and mutually alter a Search and Orientation method |
| CN108011360A (en) * | 2017-12-30 | 2018-05-08 | 长园深瑞继保自动化有限公司 | Double loop round and round quickly unlinks method |
| CN108072849A (en) * | 2017-12-20 | 2018-05-25 | 广州勤正电力科技有限公司 | Insulation reduces trouble-shooting system |
| CN108120894A (en) * | 2017-12-20 | 2018-06-05 | 广州勤正电力科技有限公司 | Direct-current system loop trouble-shooting system |
| CN110412399A (en) * | 2019-08-27 | 2019-11-05 | 中国南方电网有限责任公司超高压输电公司天生桥局 | A kind of double split-core type meter formula DC earthing searching instruments |
| CN111175552A (en) * | 2019-12-11 | 2020-05-19 | 国家电网有限公司 | Device for detecting electricity stealing in rectification mode |
| CN111650450A (en) * | 2020-04-03 | 2020-09-11 | 杭州奥能电源设备有限公司 | Identification method based on direct current mutual string identification device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1715937A (en) * | 2005-06-28 | 2006-01-04 | 天津大学 | Detecting device and its method for DC system earthing fault |
| CN101022216A (en) * | 2007-02-07 | 2007-08-22 | 燕山大学 | Small earthing current electric network single phase fault wire selecting method and apparatus |
| CN101452034A (en) * | 2007-11-30 | 2009-06-10 | 上海市电力公司超高压输变电公司 | Portable intelligent DC earthing searching instrument |
| US20100173214A1 (en) * | 2008-01-29 | 2010-07-08 | Tibor Fabian | Controller for fuel cell operation |
| CN202178612U (en) * | 2010-10-22 | 2012-03-28 | 甘肃省电力公司金昌供电公司 | Electrolytic ring-carrying device special for direct current power supply |
-
2010
- 2010-10-22 CN CN 201010517531 patent/CN102043114A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1715937A (en) * | 2005-06-28 | 2006-01-04 | 天津大学 | Detecting device and its method for DC system earthing fault |
| CN101022216A (en) * | 2007-02-07 | 2007-08-22 | 燕山大学 | Small earthing current electric network single phase fault wire selecting method and apparatus |
| CN101452034A (en) * | 2007-11-30 | 2009-06-10 | 上海市电力公司超高压输变电公司 | Portable intelligent DC earthing searching instrument |
| US20100173214A1 (en) * | 2008-01-29 | 2010-07-08 | Tibor Fabian | Controller for fuel cell operation |
| CN202178612U (en) * | 2010-10-22 | 2012-03-28 | 甘肃省电力公司金昌供电公司 | Electrolytic ring-carrying device special for direct current power supply |
Non-Patent Citations (2)
| Title |
|---|
| 《广东电力》 20100930 徐玉凤等 直流系统环网故障的危害与处理 第23卷, 第9期 * |
| 《继电器》 20080201 罗志平等 变电站中直流系统存在的环网问题及解决办法 第36卷, 第3期 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064822A (en) * | 2017-01-04 | 2017-08-18 | 贵阳英纳瑞电气有限公司 | Two sections of direct currents of straight-flow system mutually alter monitoring and mutually alter a Search and Orientation method |
| CN106646141A (en) * | 2017-02-28 | 2017-05-10 | 深圳市汇业达通讯技术有限公司 | Automatic detection method and system for direct current power supply bus loop closing |
| CN108072849A (en) * | 2017-12-20 | 2018-05-25 | 广州勤正电力科技有限公司 | Insulation reduces trouble-shooting system |
| CN108120894A (en) * | 2017-12-20 | 2018-06-05 | 广州勤正电力科技有限公司 | Direct-current system loop trouble-shooting system |
| CN108011360A (en) * | 2017-12-30 | 2018-05-08 | 长园深瑞继保自动化有限公司 | Double loop round and round quickly unlinks method |
| CN108011360B (en) * | 2017-12-30 | 2019-04-16 | 长园深瑞继保自动化有限公司 | Double loop round and round quickly unlinks method |
| CN110412399A (en) * | 2019-08-27 | 2019-11-05 | 中国南方电网有限责任公司超高压输电公司天生桥局 | A kind of double split-core type meter formula DC earthing searching instruments |
| CN111175552A (en) * | 2019-12-11 | 2020-05-19 | 国家电网有限公司 | Device for detecting electricity stealing in rectification mode |
| CN111650450A (en) * | 2020-04-03 | 2020-09-11 | 杭州奥能电源设备有限公司 | Identification method based on direct current mutual string identification device |
| CN111650450B (en) * | 2020-04-03 | 2022-07-15 | 杭州奥能电源设备有限公司 | Identification method based on direct current mutual string identification device |
| CN112904241A (en) * | 2021-01-27 | 2021-06-04 | 广东电网有限责任公司 | Ring network fault finding method, device and system |
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Owner name: HEBEI ELECTRIC POWER RESEARCH INSTITUTE GUANGZHOU Free format text: FORMER OWNER: HEBEI ELECTRIC POWER RESEARCH INSTITUTE GUANGZHOU QIANSHUN ELECTRONIC EQUIPMENT CO., LTD. Effective date: 20131218 |
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Effective date of registration: 20131218 Address after: 737100 No. 78, Xinhua Road, Gansu, Jinchang Applicant after: Jinchang Power Supply Company of Gansu Electric Power Corporation Applicant after: Hebei Electric Power Research Institute Applicant after: Guangzhou Qianshun Electronic Equipment Co., Ltd. Applicant after: State Grid Corporation of China Address before: 737100 No. 78, Xinhua Road, Gansu, Jinchang Applicant before: Jinchang Power Supply Company of Gansu Electric Power Corporation Applicant before: Hebei Electric Power Research Institute Applicant before: Guangzhou Qianshun Electronic Equipment Co., Ltd. |
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Application publication date: 20110504 |