CN106405408A - Monitoring device for preventing direct-current reverse mode operation power losing and detection method thereof - Google Patents
Monitoring device for preventing direct-current reverse mode operation power losing and detection method thereof Download PDFInfo
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- CN106405408A CN106405408A CN201611034278.6A CN201611034278A CN106405408A CN 106405408 A CN106405408 A CN 106405408A CN 201611034278 A CN201611034278 A CN 201611034278A CN 106405408 A CN106405408 A CN 106405408A
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- bus connection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention relates to the direct current system technology field and especially relates to a monitoring device for preventing direct-current reverse mode operation power losing and a detection method thereof. The device comprises a CPU, a detection module, a discharge module, a voltage acquisition module, a current acquisition module and a communication module, wherein the detection module is connected to the CPU; and the communication module is communicated with an upper computer. In the invention, whether buscouple and bus throwing switches of two segments of buses are closed can be accurately determined. A reliable basis is provided for reverse mode operation. Power losing during a direct-current reverse mode operation process is prevented and accident generation can be effectively avoided.
Description
Technical field
The present invention relates to straight-flow system technical field is and in particular to a kind of anti-direct current falls mode and operates the monitoring device of dead electricity
And its detection method.
Background technology
Straight-flow system occupies very important status in power plant, transformer station, and it is various protections, signal, combined floodgate are grasped
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 all cannot occur
Situation, if there is the situation of bus dead electricity, protection device power down can 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 the great anti-accident measures of 18 electrical networks 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 and falls mode to operate when being carried out in accordance with regulations routine test, 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 carry out direct current to fall when mode operates to make
Become transforming plant DC bus dead electricity to will result directly in our station protective relaying device and measure and control device etc. cannot work because of dead electricity.Cause
This, carry out direct current fall mode operate when, accurately judge mother, female throwing on off state of crucial importance.
Content of the invention
In order to solve the deficiency in above-mentioned technical problem, it is an object of the invention to：Mode is grasped to provide a kind of anti-direct current
Make the monitoring device of dead electricity, can accurately judge the mother of two sections of buses, female throw whether switch closes, operate and carry for falling mode
For reliable basis, prevent dead electricity in the direct current operating process of falling mode.
The technical scheme that the present invention is adopted by its technical problem of solution is：
Described anti-direct current is fallen 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 being communicated with host computer；Described detection module is main
It is composed in series by Zener diode D2, D3 and resistance R8；Described discharge module is mainly by DC high-power relay K, insulated gate
Bipolar transistor IGBT and gold resistance R9 composition；Described voltage acquisition module includes bleeder circuit, optical coupling isolation circuit, electricity
Pressure follows circuit and filter circuit；Described current acquisition module includes current transformer, bleeder circuit, voltage follower circuit, bears
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
Linear optical coupling to be included, 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
Operational amplifier to be included, filter circuit mainly includes resistance R7 ' and electric capacity C4 '.
Described anti-direct current falls mode and operates the detection method of dead electricity, comprises the following steps：
(1) measure the voltage-to-ground of I, II section positive and negative busbar W1+, W1-, W2+, W2-, if each section of voltage-to-ground is normal,
Judge that the female switch K2 that throws of I section female throwing switch K1 and II section closes, enter next step, if abnormal, stop test, check mother
The female wiring throwing switch K1, K2 of switch K3, I, II section；
(2) put into detection module between I section positive bus-bar W1+ and II section negative busbar W2- to be detected, if I section positive bus-bar
W1+ voltage reduces, and I section negative busbar W1- voltage raises, then be judged as that bus connection switch K3 disconnects, inspection bus connection switch K3 and I,
The female wiring throwing switch K1, K2 of II section, otherwise enters next step；
(3) put into discharge module between I section positive bus-bar W1+ and II section negative busbar W2-, simultaneously at measurement bus connection switch K3
The electric current flowing through, if not having electric current, judges that bus connection switch K3 disconnects；If there being electric current, judge that bus connection switch K3 closes；
(4) measure the voltage-to-ground of I, II section positive and negative busbar W1+, W1-, W2+, W2-, if each section of voltage-to-ground is normal,
Judge that the female switch K2 that throws of I section female throwing switch K1 and II section closes, enter next step, if abnormal, stop test, check mother
The female wiring throwing switch K1, K2 of switch K3, I, II section；
(5) put into detection module between I section negative busbar W1- and II section positive bus-bar W2+ to be detected, if II section positive bus-bar
W2+ voltage reduces, and II section negative busbar W2- voltage raises, then be judged as that bus connection switch K3 disconnects, inspection bus connection switch K3 and I,
The female wiring throwing switch K1, K2 of II section, otherwise enters next step；
(6) put into discharge module between I section negative busbar W1- and II section positive bus-bar W2+, simultaneously at measurement bus connection switch K3
The electric current flowing through, if not having electric current, judges that bus connection switch K3 disconnects；If there being electric current, judge that bus connection switch K3 closes；
(7) if all judging in step (3) and step (6), bus connection switch K3 closes, and judges bus connection switch K3 closure, if its
In arbitrary judgement bus connection switch K3 disconnect, then be judged to that bus connection switch K3 disconnects.
Further preferably, mainly flow through using at current transformer TA measurement bus connection switch K3 in step (3) and step (6)
Electric current.
Compared with prior art, the invention has the advantages that：
The present invention can accurately judge the mother of two sections of buses, female throw whether switch closes, operate offer for falling mode
Reliable basis, prevent dead electricity in the direct current operating process of falling mode, can effectively avoid the generation of accident.
Brief description
Fig. 1 present configuration block diagram；
Fig. 2 detection principle diagram of the present invention；
Fig. 3 voltage acquisition module of the present invention circuit diagram；
Fig. 4 current acquisition of the present invention module circuit diagram；
Fig. 5 detection module of the present invention circuit diagram；
Fig. 6 discharge module of the present invention circuit diagram；
Fig. 7 present invention switchs decision flow chart.
Specific embodiment
Below in conjunction with the accompanying drawings the embodiment of the present invention is described further：
As shown in figures 1 to 6, anti-direct current of the present invention falls mode and operates the monitoring device of dead electricity, including CPU, with CPU phase
Detection module, discharge module, voltage acquisition module, current acquisition module and the communication mould being communicated with host computer connecting
Block, communication module is communicated with host computer using 485 bus modes, it then follows MODBUS agreement；CPU controls detection module and puts
The input of electric module and cut-out, the data according to the collection of voltage and current acquisition module simultaneously, final determine bus connection switch K3 with
And female throwing of I, II section switchs whether K1, K2 close, CPU can choose STM32F103RCT6.
Described detection module is mainly composed in series by Zener diode D2, D3 and resistance R8, specifically can be by two
The resistance composition of 100V Zener diode and a 200k Ω, for the different intersegmental heteropole conducting of I, II section bus.
Described discharge module is mainly by DC high-power relay K, insulated gate bipolar transistor IGBT and gold resistance
R9 forms, and for the different intersegmental heteropole electric discharge of I, II section bus, determines whether bus connection switch K3 closes, wherein gold resistance R9 can
Using 50W50 Ω, four resistant series, can 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 adopt HFE18V-20/450-24-H2, maximum switching electric current
20A, maximum switching magnitude of voltage 450V, the preferred FGW75N60HD of IGBT, ceiling voltage 600V, maximum current 70A.
Described voltage acquisition module includes bleeder circuit, optical coupling isolation circuit, voltage follower circuit and filter circuit, mainly
The voltage-to-ground of Real-time Collection I, II section 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 input, light by amplifier MCP6002
Voltage signal after voltage follower output isolation for the coupling output, the single order RC filter circuit then consisting of R6 and C2 enters
Enter AD acquisition chip AD7266.
Described 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 adopts SC1V-50A/5V, electric current
After two front end 47K precision 1 ‰ resistance R1 ' and R2 ' partial pressure, voltage raises 1.25V by VREF to the input voltage of sensor
Then pass through the filter circuit of resistance R7 ' and electric capacity C4 ' composition, finally enter AD acquisition chip 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, described anti-direct current falls mode and operates the detection method of dead electricity, comprise the following steps：
(1) measure the voltage-to-ground of I, II section positive and negative busbar W1+, W1-, W2+, W2-, if each section of voltage-to-ground is normal,
Judge that the female switch K2 that throws of I section female throwing switch K1 and II section closes, enter next step, if abnormal, stop test, check mother
The female wiring throwing switch K1, K2 of switch K3, I, II section；
(2) put into detection module between I section positive bus-bar W1+ and II section negative busbar W2- to be detected, if I section positive bus-bar
W1+ voltage reduces, and I section negative busbar W1- voltage raises, then be judged as that bus connection switch K3 disconnects, inspection bus connection switch K3 and I,
The female wiring throwing switch K1, K2 of II section, otherwise enters next step；
(3) put into discharge module between I section positive bus-bar W1+ and II section negative busbar W2-, simultaneously at measurement bus connection switch K3
The electric current flowing through, if not having electric current, judges that bus connection switch K3 disconnects；If there being electric current, judge that bus connection switch K3 closes；
(4) measure the voltage-to-ground of I, II section positive and negative busbar W1+, W1-, W2+, W2-, if each section of voltage-to-ground is normal,
Judge that the female switch K2 that throws of I section female throwing switch K1 and II section closes, enter next step, if abnormal, stop test, check mother
The female wiring throwing switch K1, K2 of switch K3, I, II section；
(5) put into detection module between I section negative busbar W1- and II section positive bus-bar W2+ to be detected, if II section positive bus-bar
W2+ voltage reduces, and II section negative busbar W2- voltage raises, then be judged as that bus connection switch K3 disconnects, inspection bus connection switch K3 and I,
The female wiring throwing switch K1, K2 of II section, otherwise enters next step；
(6) put into discharge module between I section negative busbar W1- and II section positive bus-bar W2+, simultaneously at measurement bus connection switch K3
The electric current flowing through, if not having electric current, judges that bus connection switch K3 disconnects；If there being electric current, judge that bus connection switch K3 closes；
(7) if all judging in step (3) and step (6), bus connection switch K3 closes, and judges bus connection switch K3 closure, if its
In arbitrary judgement bus connection switch K3 disconnect, then be judged to that bus connection switch K3 disconnects.
Wherein, mainly measure, using current transformer TA, the electricity flowing through at bus connection switch K3 in step (3) and step (6)
Stream.
Claims (5)
1. mode operates the monitoring device of dead electricity it is characterised in that including CPU, the detection being connected with CPU to a kind of anti-direct current
Module, discharge module, voltage acquisition module, current acquisition module and the communication module being communicated with host computer；Described inspection
Survey module to be mainly composed in series by Zener diode D2, D3 and resistance R8；Described discharge module is mainly by DC high-power relay
Device K, insulated gate bipolar transistor IGBT and gold resistance R9 composition；Described voltage acquisition module includes bleeder circuit, optocoupler
Isolation circuit, voltage follower circuit and filter circuit；Described 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
Operational amplifier to be included, 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 '.
4. anti-direct current described in a kind of employing claim 1 fall mode operate dead electricity monitoring device anti-direct current fall mode operate mistake
The detection method of electricity is it is characterised in that comprise the following steps：
(1) measure the voltage-to-ground of I, II section positive and negative busbar W1+, W1-, W2+, W2-, if each section of voltage-to-ground is normal, judge I
The female switch K2 that throws of section female throwing switch K1 and II section closes, and enters next step, if abnormal, stop test, check bus connection switch
The female wiring throwing switch K1, K2 of K3, I, II section；
(2) put into detection module between I section positive bus-bar W1+ and II section negative busbar W2- to be detected, if I section positive bus-bar W1+ is electric
Pressure drop is low, and I section negative busbar W1- voltage raises, then be judged as that bus connection switch K3 disconnects, and checks that bus connection switch K3 and I, II section are female
Throw the wiring of switch K1, K2, otherwise enter next step；
(3) put into discharge module between I section positive bus-bar W1+ and II section negative busbar W2-, flow through at measurement bus connection switch K3 simultaneously
Electric current, if there is no electric current, judge bus connection switch K3 disconnect；If there being electric current, judge that bus connection switch K3 closes；
(4) measure the voltage-to-ground of I, II section positive and negative busbar W1+, W1-, W2+, W2-, if each section of voltage-to-ground is normal, judge I
The female switch K2 that throws of section female throwing switch K1 and II section closes, and enters next step, if abnormal, stop test, check bus connection switch
The female wiring throwing switch K1, K2 of K3, I, II section；
(5) put into detection module between I section negative busbar W1- and II section positive bus-bar W2+ to be detected, if II is section positive bus-bar W2+
Voltage reduces, and II section negative busbar W2- voltage raises, then be judged as that bus connection switch K3 disconnects, check bus connection switch K3 and I, II
The female wiring throwing switch K1, K2 of section, otherwise enters next step；
(6) put into discharge module between I section negative busbar W1- and II section positive bus-bar W2+, flow through at measurement bus connection switch K3 simultaneously
Electric current, if there is no electric current, judge bus connection switch K3 disconnect；If there being electric current, judge that bus connection switch K3 closes；
(7) if all judging in step (3) and step (6), bus connection switch K3 closes, and judges bus connection switch K3 closure, if wherein appointing
One judges that bus connection switch K3 disconnects, then be judged to that bus connection switch K3 disconnects.
5. anti-direct current according to claim 4 fall mode operate dead electricity detection method it is characterised in that step (3) and
The electric current flowing through at the main measurement bus connection switch K3 using current transformer TA in step (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611034278.6A CN106405408A (en) | 2016-11-16 | 2016-11-16 | Monitoring device for preventing direct-current reverse mode operation power losing and detection method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611034278.6A CN106405408A (en) | 2016-11-16 | 2016-11-16 | Monitoring device for preventing direct-current reverse mode operation power losing and detection method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106405408A true CN106405408A (en) | 2017-02-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611034278.6A Withdrawn CN106405408A (en) | 2016-11-16 | 2016-11-16 | Monitoring device for preventing direct-current reverse mode operation power losing and detection method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN106405408A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106990329A (en) * | 2017-05-16 | 2017-07-28 | 国家电网公司 | A kind of distribution line dead electricity alarm signal harvester |
| CN110794293A (en) * | 2019-09-23 | 2020-02-14 | 国网辽宁省电力有限公司丹东供电公司 | Method for detecting automatic nuclear capacity switch state of storage battery |
| CN112014697A (en) * | 2020-08-26 | 2020-12-01 | 浙江巨磁智能技术有限公司 | Direct-current power supply system insulation fault troubleshooting method using Beidou system |
-
2016
- 2016-11-16 CN CN201611034278.6A patent/CN106405408A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106990329A (en) * | 2017-05-16 | 2017-07-28 | 国家电网公司 | A kind of distribution line dead electricity alarm signal harvester |
| CN110794293A (en) * | 2019-09-23 | 2020-02-14 | 国网辽宁省电力有限公司丹东供电公司 | Method for detecting automatic nuclear capacity switch state of storage battery |
| CN112014697A (en) * | 2020-08-26 | 2020-12-01 | 浙江巨磁智能技术有限公司 | Direct-current power supply system insulation fault troubleshooting method using Beidou system |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20190815 Address after: 255086 Room 405, Block E, Gaochuang Park, 135 Zhengdao Road, Zibo High-tech District, Shandong Province Applicant after: Zhiyang Innovation Technology Co., Ltd. Address before: 405 room 255086, block E, No. 135, Zibo Development Zone, Shandong, China Applicant before: Wang Yalu |
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| TA01 | Transfer of patent application right | ||
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Application publication date: 20170215 |
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