CN206292364U - Anti- direct current falls mode and operates the monitoring device of dead electricity - Google Patents
Anti- direct current falls mode and operates the monitoring device of dead electricity Download PDFInfo
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- CN206292364U CN206292364U CN201621255604.1U CN201621255604U CN206292364U CN 206292364 U CN206292364 U CN 206292364U CN 201621255604 U CN201621255604 U CN 201621255604U CN 206292364 U CN206292364 U CN 206292364U
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- dead electricity
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- 230000005611 electricity Effects 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 15
- 238000004891 communication Methods 0.000 claims abstract description 5
- 230000001808 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 238000002955 isolation Methods 0.000 claims description 7
- 230000003287 optical Effects 0.000 claims description 7
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 5
- 239000010931 gold Substances 0.000 claims description 5
- 229910052737 gold Inorganic materials 0.000 claims description 5
- 238000007689 inspection Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 4
- 230000004224 protection Effects 0.000 description 2
- 229910004682 ON-OFF Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000001681 protective Effects 0.000 description 1
- 238000009666 routine test Methods 0.000 description 1
- 230000001131 transforming Effects 0.000 description 1
Abstract
The utility model is related to straight-flow system technical field, specifically related to a kind of anti-direct current falls mode and operates the monitoring device of dead electricity, including CPU, the detection module being connected with CPU, discharge module, voltage acquisition module, current acquisition module and the communication module communicated with host computer；The utility model can accurately judge two sections of mothers of bus, it is female throw whether switch closes, operate offer reliable basis to fall mode, prevent the dead electricity in the direct current operating process of falling mode, can effectively avoid the generation of accident.
Description
Technical field
The utility model is related to straight-flow system technical field, and in particular to a kind of anti-direct current falls mode and operates the monitoring of dead electricity
Device.
Background technology
Straight-flow system occupies very important status in power plant, transformer station, and it is various protections, signal, close a floodgate behaviour
The devices such as work provide dc source.As long as transformer station direct current system puts into operation, under any circumstance, bus dead electricity cannot all occur
Situation, if there is the situation of bus dead electricity, protection device can power down cause low-voltage dead lock or tripping, produce not it is contemplated that
Serious consequence.
Also clear stipulaties should be periodically to DC charging device for 18 great anti-accident measures of power network of State Grid Corporation of China
The precision of voltage regulation, precision of steady current and ripple factor are verified, and periodically carry out checking discharging test to batteries.For double sets
The transformer station of direct current configuration, needs to carry out direct current that mode is operated when routine test is carried out in accordance with regulations, will be to be tested a set of
DC equipment is out of service, by two sections of dc bus of other set DC equipment band.If carrying out direct current to be made when mode is operated
Will result directly in our station protective relaying device and measure and control device etc. into transforming plant DC bus dead electricity cannot work because of dead electricity.Cause
This, when carrying out direct current mode being operated, accurately judges that mother, female on off state thrown are of crucial importance.
Utility model content
In order to solve the above-mentioned technical problem the deficiency in, the purpose of this utility model is：A kind of anti-direct current side is provided
Formula operates the monitoring device of dead electricity, can accurately judge two sections of mothers of bus, it is female throw whether switch closes, grasped to fall mode
Offer reliable basis are provided, the dead electricity in the direct current operating process of falling mode is prevented.
The utility model by technical scheme that solution its technical problem is used for：
The anti-direct current falls mode and operates the monitoring device of dead electricity, including CPU, the detection module being connected with CPU, electric discharge
Module, voltage acquisition module, current acquisition module and the communication module communicated with host computer；The detection module is main
It is composed in series by voltage-regulator diode D2, D3 and resistance R8；The discharge module is main by DC high-power relay K, insulated gate
Bipolar transistor IGBT and gold resistance R9 are constituted；The voltage acquisition module includes bleeder circuit, optical coupling isolation circuit, electricity
Pressure follows circuit and filter circuit；The current acquisition module includes current transformer, bleeder circuit, voltage follower circuit, negative
Pressure lifting circuit and filter circuit.
Further preferably, the bleeder circuit in voltage acquisition module mainly includes resistance R1 and R2, optical coupling isolation circuit master
To include linear optical coupling, voltage follower circuit mainly includes operational amplifier, and the filter circuit of voltage acquisition module mainly includes
Resistance R6 and electric capacity C2.
Further preferably, the bleeder circuit of current acquisition module mainly includes resistance R1 ' and R2 ', voltage follower circuit master
To include operational amplifier, filter circuit mainly includes resistance R7 ' and electric capacity C4 '.
The anti-direct current falls mode and operates the detection method of dead electricity, comprises the following steps：
(1) I, II section of voltage-to-ground of positive and negative busbar W1+, W1-, W2+, W2- is measured, if each section of voltage-to-ground is normal,
Judge that the I sections of female switch K2 that throws of female K1 and II sections of throwing switch is closed, into next step, if abnormal, stop test, check mother
The female wiring for throwing switch K1, K2 of K3, I, II section of switch；
(2) put into detection module between W1+ and II section of negative busbar W2- of I sections of positive bus-bar to be detected, if I sections of positive bus-bar
W1+ voltages reduction, I sections of negative busbar W1- voltages are raised, then be judged as that bus connection switch K3 disconnects, inspection bus connection switch K3 and I,
II sections of female wiring for throwing switch K1, K2, otherwise into next step；
(3) discharge module is put between W1+ and II section of negative busbar W2- of I sections of positive bus-bar, while measuring at bus connection switch K3
The electric current for flowing through, judges that bus connection switch K3 disconnects if without electric current；Judge that bus connection switch K3 is closed if having electric current；
(4) I, II section of voltage-to-ground of positive and negative busbar W1+, W1-, W2+, W2- is measured, if each section of voltage-to-ground is normal,
Judge that the I sections of female switch K2 that throws of female K1 and II sections of throwing switch is closed, into next step, if abnormal, stop test, check mother
The female wiring for throwing switch K1, K2 of K3, I, II section of switch；
(5) put into detection module between W1- and II section of positive bus-bar W2+ of I sections of negative busbar to be detected, if II sections of positive bus-bar
W2+ voltages reduction, II sections of negative busbar W2- voltages are raised, then be judged as that bus connection switch K3 disconnects, inspection bus connection switch K3 and I,
II sections of female wiring for throwing switch K1, K2, otherwise into next step；
(6) discharge module is put between W1- and II section of positive bus-bar W2+ of I sections of negative busbar, while measuring at bus connection switch K3
The electric current for flowing through, judges that bus connection switch K3 disconnects if without electric current；Judge that bus connection switch K3 is closed if having electric current；
(7) if judging in step (3) and step (6), bus connection switch K3 is closed, and judges bus connection switch K3 closures, if its
In any judgement bus connection switch K3 disconnect, then be judged to that bus connection switch K3 disconnects.
Further preferably, it is main using being flowed through at current transformer TA measurement bus connection switches K3 in step (3) and step (6)
Electric current.
Compared with prior art, the utility model has the advantages that：
The utility model can accurately judge two sections of mothers of bus, it is female throw whether switch closes, operated to fall mode
Reliable basis are provided, the dead electricity in the direct current operating process of falling mode is prevented, the generation of accident can be effectively avoided.
Brief description of the drawings
Fig. 1 the utility model structured flowcharts；
Fig. 2 the utility model detection principle diagrams；
Fig. 3 the utility model voltage acquisition module circuit diagrams；
Fig. 4 the utility model current acquisition module circuit diagrams；
Fig. 5 the utility model detection module circuit diagrams；
Fig. 6 the utility model discharge module circuit diagrams；
Fig. 7 the utility model switchs decision flow chart.
Specific embodiment
The utility model embodiment is described further below in conjunction with the accompanying drawings：
As shown in figures 1 to 6, anti-direct current described in the utility model falls mode and operates the monitoring device of dead electricity, including CPU, with
Detection module that CPU is connected, discharge module, voltage acquisition module, current acquisition module and communicated with host computer
Communication module, communication module is communicated using 485 bus modes with host computer, it then follows MODBUS agreements；CPU control detection moulds
The input and cut-out of block and discharge module, while the data gathered according to voltage and current acquisition module, final to determine that mother is opened
Close K3 and I, II section of female throwing switchs whether K1, K2 close, CPU can choose STM32F103RCT6.
The detection module is mainly composed in series by voltage-regulator diode D2, D3 and resistance R8, specifically can be by two
100V voltage-regulator diodes and a resistance composition of 200k Ω, for the different intersegmental heteropole conductings of I, II section of bus.
The discharge module is main by DC high-power relay K, insulated gate bipolar transistor IGBT and gold resistance
R9 is constituted, and for the different intersegmental heteropole electric discharges of I, II section of bus, determines whether bus connection switch K3 closes, and wherein gold resistance R9 can
To use 50W50 Ω, four resistant series to discharge in short-term 4 seconds after tested, the test interval allowed more than 1 minute
Gold resistance fully radiates, and DC high-power relay K can use HFE18V-20/450-24-H2, maximum switching electric current
20A, maximum switching magnitude of voltage 450V, IGBT preferred FGW75N60HD, ceiling voltage 600V, maximum current 70A.
The voltage acquisition module includes bleeder circuit, optical coupling isolation circuit, voltage follower circuit and filter circuit, mainly
Real-time Collection I, II section of voltage-to-ground of positive and negative busbar W1+, W1-, W2+, W2-, totally six tunnel, specifically, the voltage signal of collection
By R1, R2 electric resistance partial pressure, the signal after partial pressure enters HCNR201 linear optical coupling isolation inputs, light by amplifier MCP6002
Voltage signal of the coupling output after voltage follower exports isolation, is then entered by the single order RC filter circuits that R6 and C2 is constituted
Enter AD acquisition chips AD7266.
The current acquisition module includes current transformer, bleeder circuit, voltage follower circuit, negative pressure lifting circuit and filter
Wave circuit, is mainly used in gathering the current value at bus connection switch K3, specifically, current transformer uses SC1V-50A/5V, electric current
After the input voltage of sensor is through two resistance R1 ' of front end 47K precision 1 ‰ and R2 ' partial pressures, voltage raises 1.25V by VREF
Then the filter circuit being made up of resistance R7 ' and electric capacity C4 ', finally enters AD acquisition chips AD7266.
In addition, CPU is also connected with temperature collect module, temperature collect module is used for Real-time Collection environment temperature.
As shown in fig. 7, the anti-direct current falls mode and operates the detection method of dead electricity, comprise the following steps：
(1) I, II section of voltage-to-ground of positive and negative busbar W1+, W1-, W2+, W2- is measured, if each section of voltage-to-ground is normal,
Judge that the I sections of female switch K2 that throws of female K1 and II sections of throwing switch is closed, into next step, if abnormal, stop test, check mother
The female wiring for throwing switch K1, K2 of K3, I, II section of switch；
(2) put into detection module between W1+ and II section of negative busbar W2- of I sections of positive bus-bar to be detected, if I sections of positive bus-bar
W1+ voltages reduction, I sections of negative busbar W1- voltages are raised, then be judged as that bus connection switch K3 disconnects, inspection bus connection switch K3 and I,
II sections of female wiring for throwing switch K1, K2, otherwise into next step；
(3) discharge module is put between W1+ and II section of negative busbar W2- of I sections of positive bus-bar, while measuring at bus connection switch K3
The electric current for flowing through, judges that bus connection switch K3 disconnects if without electric current；Judge that bus connection switch K3 is closed if having electric current；
(4) I, II section of voltage-to-ground of positive and negative busbar W1+, W1-, W2+, W2- is measured, if each section of voltage-to-ground is normal,
Judge that the I sections of female switch K2 that throws of female K1 and II sections of throwing switch is closed, into next step, if abnormal, stop test, check mother
The female wiring for throwing switch K1, K2 of K3, I, II section of switch；
(5) put into detection module between W1- and II section of positive bus-bar W2+ of I sections of negative busbar to be detected, if II sections of positive bus-bar
W2+ voltages reduction, II sections of negative busbar W2- voltages are raised, then be judged as that bus connection switch K3 disconnects, inspection bus connection switch K3 and I,
II sections of female wiring for throwing switch K1, K2, otherwise into next step；
(6) discharge module is put between W1- and II section of positive bus-bar W2+ of I sections of negative busbar, while measuring at bus connection switch K3
The electric current for flowing through, judges that bus connection switch K3 disconnects if without electric current；Judge that bus connection switch K3 is closed if having electric current；
(7) if judging in step (3) and step (6), bus connection switch K3 is closed, and judges bus connection switch K3 closures, if its
In any judgement bus connection switch K3 disconnect, then be judged to that bus connection switch K3 disconnects.
Wherein, current transformer TA is mainly used to measure the electricity flowed through at bus connection switch K3 in step (3) and step (6)
Stream.
Claims (3)
1. a kind of anti-direct current falls mode and operates the monitoring device of dead electricity, it is characterised in that including CPU, the detection being connected with CPU
Module, discharge module, voltage acquisition module, current acquisition module and the communication module communicated with host computer；The inspection
Module is surveyed mainly to be composed in series by voltage-regulator diode D2, D3 and resistance R8；The discharge module is main by DC high-power relay
Device K, insulated gate bipolar transistor IGBT and gold resistance R9 composition；The voltage acquisition module includes bleeder circuit, optocoupler
Isolation circuit, voltage follower circuit and filter circuit；The current acquisition module includes current transformer, bleeder circuit, voltage
Follow circuit, negative pressure lifting circuit and filter circuit.
2. anti-direct current according to claim 1 falls mode and operates the monitoring device of dead electricity, it is characterised in that voltage acquisition mould
Bleeder circuit in block mainly includes resistance R1 and R2, and optical coupling isolation circuit mainly includes linear optical coupling, voltage follower circuit master
To include operational amplifier, the filter circuit of voltage acquisition module mainly includes resistance R6 and electric capacity C2.
3. anti-direct current according to claim 1 falls mode and operates the monitoring device of dead electricity, it is characterised in that current acquisition mould
The bleeder circuit of block mainly includes resistance R1 ' and R2 ', and voltage follower circuit mainly includes operational amplifier, and filter circuit is main
Including resistance R7 ' and electric capacity C4 '.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621255604.1U CN206292364U (en) | 2016-11-16 | 2016-11-16 | Anti- direct current falls mode and operates the monitoring device of dead electricity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621255604.1U CN206292364U (en) | 2016-11-16 | 2016-11-16 | Anti- direct current falls mode and operates the monitoring device of dead electricity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206292364U true CN206292364U (en) | 2017-06-30 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621255604.1U Active CN206292364U (en) | 2016-11-16 | 2016-11-16 | Anti- direct current falls mode and operates the monitoring device of dead electricity |
Country Status (1)
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| CN (1) | CN206292364U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111063531A (en) * | 2020-01-07 | 2020-04-24 | 南方电网科学研究院有限责任公司 | Voltage transformer |
-
2016
- 2016-11-16 CN CN201621255604.1U patent/CN206292364U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111063531A (en) * | 2020-01-07 | 2020-04-24 | 南方电网科学研究院有限责任公司 | Voltage transformer |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 255086 Zibo high tech Zone, Shandong Road, No. 135, block E, Room 405 Patentee after: Zhiyang Innovation Technology Co., Ltd. Address before: 255086 Zibo high tech Zone, Shandong Road, No. 135, block E, Room 405 Patentee before: SHANDONG ZHIYANG ELECTRIC CO., LTD. |