CN110061471A - A kind of method for detecting short circuit of long range electric current - Google Patents
A kind of method for detecting short circuit of long range electric current Download PDFInfo
- Publication number
- CN110061471A CN110061471A CN201910309001.7A CN201910309001A CN110061471A CN 110061471 A CN110061471 A CN 110061471A CN 201910309001 A CN201910309001 A CN 201910309001A CN 110061471 A CN110061471 A CN 110061471A
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- China
- Prior art keywords
- central processing
- electric current
- module
- short circuit
- long range
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0092—Details of emergency protective circuit arrangements concerning the data processing means, e.g. expert systems, neural networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
- H02H3/042—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned combined with means for locating the fault
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/44—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to the rate of change of electrical quantities
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- Engineering & Computer Science (AREA)
- Artificial Intelligence (AREA)
- Evolutionary Computation (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
A kind of method for detecting short circuit of long range electric current disclosed by the invention; it is characterized by comprising power module, acquisition module, central processing module, Mathematic Model Library, man-machine interfaces; the power module outlet, acquisition module output end, Mathematic Model Library output end are connect with central processing module input terminal respectively; central processing module is bi-directionally connected with man-machine interface; quick collection is made to the change rate of electric current in power grid by the single-chip microcontroller of high speed processing to handle, and solves the problems, such as that traditional overcurrent protection sensitivity is low, actuation time is long.
Description
Technical field
The present invention relates to a kind of method for detecting short circuit of long range electric current.
Background technique
Electrical Safety problem constrains the fast development of productivity, solves the problems, such as that Electrical Safety especially solves safety of coal mines
It produces particularly problematic.New material, new device are constantly released, and are development of new electrical equipment, are solved the problems, such as that Electrical Safety is established
Basis is determined.But the development of new equipment needs the support of new technology, from the point of view of the development trend of safety utilization of electric power, it is also desirable to new reason
By come solve presently, there are Electrical Safety protection problem.The main contents of this project seek to study a kind of new Electrical Safety
Protection is theoretical, makes up the deficiency of existing protection technique.
Domestic existing technology is long to power supply distance, and the big overcurrent fault of line impedance is a kind of very effective not yet
Detection and safeguard measure.Developing one kind is influenced small, sensitive, reliable overcurrent detection technique applied to life by line parameter circuit value
Produce it is practical, to the safety for improving power supply be very it is necessary to, especially coal mine downhole safety production has particular/special requirement, existing
Short-circuit protection technology has significant limitations in performance, and the safety in production that the prior art cannot fully meet modern mine is wanted
It asks, studies new short-circuit detecting technology and security protection technology, there is very important meaning.
Domestic and international existing short-circuit protection detection technique, is roughly divided into following several major ways:
(1) overcurrent protection based on detection short circuit current size, this overcurrent protection mode is according to escaping motor most
The principle of great start-up current is adjusted, in power supply line head, when line end short circuit, and short circuit current very little, the spirit of protection
Sensitivity is extremely difficult to require.
(2) overcurrent protection based on phase sensitivity principle now studies more, also comparative maturity, although solving protection both at home and abroad
The problem of sensitivity, but such technology can only protect three-phase shortcircuit, and line to line fault protection is failure to actuate.
(3) overcurrent protection based on carrier frequency principle, the country is in coal mine electric coal drill comprehensive protector using more.But this
Kind of protection requires line parameter circuit value (cross-section of cable product, length and transformer impedance etc.) stringent, and line parameter circuit value goes beyond the scope tripping,
And poor reliability.
Such as a kind of " power equipment monitoring system " of Publication No. CN107807585A, the system include DC/DC adaptive
Answer power module, environmental data collecting module, data detection module, central control module, power distribution protection module, overload protection mould
Block, module alarm module, the system still continue to use conventional method and short circuit current are monitored and are operated, also more multiple in structure
Miscellaneous, resume module speed is slower.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of method for detecting short circuit of long range electric current.
The present invention is achieved by the following technical programs.
The method for detecting short circuit of a kind of long range electric current provided by the invention, it is characterised in that: the current changing rate is short
Road detection method includes power module, acquisition module, central processing module, Mathematic Model Library, display module, operating platform, institute
Power module outlet, acquisition module output end, Mathematic Model Library output end is stated to connect with central processing module input terminal respectively,
Central processing module is bi-directionally connected with display module, operating platform respectively respectively.
The power module is 220V DC power supply, provides relevant voltage for electronic equipment each in central processing module.
The acquisition module is the module of 89C52 single-chip microcontroller and LPC2132 chip composition, the electricity that real-time reception power grid transmits
Stream, exports different control signals to central processing module according to the case where current changing rate.
The Mathematic Model Library stores fault system mathematic model and its current waveform.
The central processing module receives the signal that acquisition module transmits, and corresponding circuit is retrieved from Mathematic Model Library
Failure system mathematical model, by result feedback to man-machine interface.
It is disconnected that the central processing module can directly execute mains-power circuit according to the fault system mathematic model retrieved
It is electrically operated.
The central processing module has the function of trouble and managing, can remember nearest five fault messages.
The display display module real-time display goes out the fault information of central processing module feedback.
The operating platform issues control instruction to central processing module.
The beneficial effects of the present invention are: the change rate of electric current in power grid is made quickly by the single-chip microcontroller of high speed processing
Collection processing solves the problems, such as that traditional overcurrent protection sensitivity is low, actuation time is long.
Detailed description of the invention
Fig. 1 is system construction drawing of the invention.
Specific embodiment
Be described further below technical solution of the present invention, but claimed range be not limited to it is described.
It is as shown in Figure 1 a kind of a kind of embodiment of the invention: method for detecting short circuit of long range electric current, the electric current becomes
Rate method for detecting short circuit includes power module, acquisition module, central processing module, Mathematic Model Library, display module, operates and put down
Platform, the power module outlet, acquisition module output end, Mathematic Model Library output end respectively with central processing module input terminal
Connection, central processing module are bi-directionally connected with display module, operating platform respectively respectively.
The power module is 220V DC power supply, provides relevant voltage for electronic equipment each in central processing module,
Guarantee that each equipment works normally.
The acquisition module is the module of 89C52 single-chip microcontroller and LPC2132 chip composition, and 89C52 single-chip microcontroller is than traditional
51 single-chip microcontrollers have more flexible CPU, can control chip with LPC2132 and link for greater flexibility, LPC2132 is that a have
The chip of the memory interface of 128 bit widths and unique accelerating structure, can exist the current changing rate information that real-time reception arrives
It is handled under maximum clock rate and exports different control signals to central processing module,.
The Mathematic Model Library stores the resulting fault system mathematic model of many experiments and its current waveform.
The central processing module receives the signal that acquisition module transmits, and corresponding circuit is retrieved from Mathematic Model Library
Failure system mathematical model feeds back result to man-machine interface, while central processing module can judge whether according to comparing result
The operation for directly executing cutting mains-power circuit, when central processing module directly executes power operation, short-circuit protection actuation time
No more than 5 milliseconds, effective distance is up to 300 meters or more；It can recorde lower nearest five fault messages simultaneously, including when failure
Between, the Grid, the fault type that break down, and can be inquired from man-machine interface.
The display module and operating platform, display module real-time display go out the fault letter of central processing module feedback
Breath, such as waveform diagram interior for a period of time when peak point current, current changing rate, short circuit current, operator can be in operating platform
Control instruction can be issued to central processing module, corresponding strategy is made according to different fault situations.
Claims (9)
1. a kind of method for detecting short circuit of long range electric current, it is characterised in that: the short circuit current detection method includes power supply mould
Block, acquisition module, central processing module, Mathematic Model Library, display module, operating platform, the power module outlet, acquisition
Module output end, Mathematic Model Library output end are connect with central processing module input terminal respectively, central processing module respectively with it is aobvious
Show that module, operating platform are bi-directionally connected respectively.
2. a kind of method for detecting short circuit of long range electric current as described in claim 1, it is characterised in that: the power module is
220V DC power supply provides relevant voltage for electronic equipment each in central processing module.
3. a kind of method for detecting short circuit of long range electric current as described in claim 1, it is characterised in that: the acquisition module is
The module of 89C52 single-chip microcontroller and LPC2132 chip composition, the electric current that real-time reception power grid transmits, according to the feelings of current changing rate
Condition exports different control signals to central processing module.
4. a kind of method for detecting short circuit of long range electric current as described in claim 1, it is characterised in that: the Mathematic Model Library
Store fault system mathematic model and its current waveform.
5. a kind of method for detecting short circuit of long range electric current as described in claim 1, it is characterised in that: the central processing mould
Block receives the signal that acquisition module transmits, and corresponding fault system mathematic model is retrieved from Mathematic Model Library, will be tied
Fruit feeds back to man-machine interface.
6. a kind of method for detecting short circuit of long range electric current as claimed in claim 5, it is characterised in that: the central processing mould
Block can directly execute mains-power circuit power operation according to the fault system mathematic model retrieved.
7. a kind of method for detecting short circuit of long range electric current as described in claim 1, it is characterised in that: the central processing mould
Block has the function of trouble and managing, can remember nearest five fault messages.
8. a kind of method for detecting short circuit of long range electric current as described in claim 1, it is characterised in that: the display shows mould
Block real-time display goes out the fault information of central processing module feedback.
9. a kind of method for detecting short circuit of long range electric current as described in claim 1, it is characterised in that: the operating platform pair
Central processing module issues control instruction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910309001.7A CN110061471A (en) | 2019-04-17 | 2019-04-17 | A kind of method for detecting short circuit of long range electric current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910309001.7A CN110061471A (en) | 2019-04-17 | 2019-04-17 | A kind of method for detecting short circuit of long range electric current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110061471A true CN110061471A (en) | 2019-07-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910309001.7A Pending CN110061471A (en) | 2019-04-17 | 2019-04-17 | A kind of method for detecting short circuit of long range electric current |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110045219A (en) * | 2019-04-17 | 2019-07-23 | 南宁学院 | A kind of method for detecting short circuit of current changing rate |
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|---|---|---|---|---|
| CN101329381A (en) * | 2008-07-28 | 2008-12-24 | 庞元俊 | Method for detecting short circuit fault with current change rate |
| CN101707359A (en) * | 2009-03-17 | 2010-05-12 | 郭道胜 | High-capacity intelligent high-speed breaking device |
| CN102830255A (en) * | 2012-08-23 | 2012-12-19 | 王金泽 | Smart electricity meter with function of monitoring and protecting power failure |
| CN103337840A (en) * | 2013-03-13 | 2013-10-02 | 南方电网科学研究院有限责任公司 | Control method of large AC-DC interconnected power grid short-circuit current limiter electromechanical transient model |
| CN110045219A (en) * | 2019-04-17 | 2019-07-23 | 南宁学院 | A kind of method for detecting short circuit of current changing rate |
-
2019
- 2019-04-17 CN CN201910309001.7A patent/CN110061471A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329381A (en) * | 2008-07-28 | 2008-12-24 | 庞元俊 | Method for detecting short circuit fault with current change rate |
| CN101707359A (en) * | 2009-03-17 | 2010-05-12 | 郭道胜 | High-capacity intelligent high-speed breaking device |
| CN102830255A (en) * | 2012-08-23 | 2012-12-19 | 王金泽 | Smart electricity meter with function of monitoring and protecting power failure |
| CN103337840A (en) * | 2013-03-13 | 2013-10-02 | 南方电网科学研究院有限责任公司 | Control method of large AC-DC interconnected power grid short-circuit current limiter electromechanical transient model |
| CN110045219A (en) * | 2019-04-17 | 2019-07-23 | 南宁学院 | A kind of method for detecting short circuit of current changing rate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110045219A (en) * | 2019-04-17 | 2019-07-23 | 南宁学院 | A kind of method for detecting short circuit of current changing rate |
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Application publication date: 20190726 |