CN113931830A - Combined type variable frequency control system and method for open-pit coal mine open-drainage system - Google Patents
Combined type variable frequency control system and method for open-pit coal mine open-drainage system Download PDFInfo
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- CN113931830A CN113931830A CN202111342088.1A CN202111342088A CN113931830A CN 113931830 A CN113931830 A CN 113931830A CN 202111342088 A CN202111342088 A CN 202111342088A CN 113931830 A CN113931830 A CN 113931830A
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- 239000003245 coal Substances 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 title claims description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 230000009471 action Effects 0.000 claims abstract description 4
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Computer Hardware Design (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention relates to the field of motor control, in particular to a combined variable frequency control system of a opencast drainage system of an open pit coal mine, which comprises power frequency equipment, variable frequency equipment, a power frequency PLC, a variable frequency PLC and a water pump, wherein the power frequency equipment is connected with the power frequency PLC; the water pump is respectively and electrically connected with the power frequency equipment and the frequency conversion equipment, and the power frequency equipment and the frequency conversion equipment are respectively connected into the three-phase circuit; the power frequency PLC is electrically connected with power frequency equipment, the power frequency equipment is used for directly realizing the power on/off of the water pump, and the power frequency PLC is used for controlling the power frequency equipment to act; the variable-frequency PLC is electrically connected with variable-frequency equipment, the variable-frequency equipment is used for directly realizing the power on and off of the water pump, and the variable-frequency PLC is used for controlling the action of the variable-frequency equipment; the power frequency PLC and the variable frequency PLC carry out data transmission in a wireless mode; the use amount of the control cable is reduced, and the investment is reduced.
Description
Technical Field
The invention relates to the field of motor control, in particular to a combined variable frequency control system and method for an open-pit coal mine open-drainage system.
Background
Because the flood control system of the bottom plate of the strip mine stope is greatly influenced by unstable rainfall and the flow of incoming water is unstable, the 6kV water pump is controlled by power frequency equipment and a PLC (programmable logic controller), the power frequency equipment is used for controlling the power on and power off of the power frequency equipment, and the drainage flow of the water pump is fixed because the power frequency equipment cannot adjust the frequency of electric power; when the rainfall is small, the water pump is easy to generate the anhydrous dry burning condition; when the rainfall is more, the water pump can generate the drainage capacity and can not meet the actual drainage requirement, so that the drainage system can not be operated under the optimal working condition.
In the prior art, a bypass of a frequency conversion device is generally added to adjust the operating frequency of a water pump; the frequency output of the frequency conversion device is adjusted along with the change of rainfall, and the drainage flow of the water pump is controlled, so that the whole set of drainage system is always in the optimal drainage working condition; in the prior art, a set of PLC realizes the control of power frequency equipment and frequency conversion equipment; however, the power frequency device is far away from the frequency conversion device, a large amount of cables need to be laid from the PLC to the frequency conversion device, the investment is large, the mine environment is poor, and the cables connected with the frequency conversion equipment by the PLC are easily damaged (the frequency conversion equipment cannot operate, and the whole system stops operating), so that the reliability of system operation is affected.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a combined variable frequency control system and method of an open-air coal mine open-air drainage system, which realize the effects of reducing the use amount of control cables, reducing the investment and calibrating whether two PLCs are normal or not.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that:
a combined variable frequency control system of a surface emission system of an open pit coal mine comprises power frequency equipment, variable frequency equipment, a power frequency PLC, a variable frequency PLC and a water pump;
the water pump is respectively and electrically connected with the power frequency equipment and the frequency conversion equipment, and the power frequency equipment and the frequency conversion equipment are respectively connected into the three-phase circuit;
the power frequency PLC is electrically connected with power frequency equipment, the power frequency equipment is used for directly realizing the power on/off of the water pump, and the power frequency PLC is used for controlling the power frequency equipment to act;
the variable-frequency PLC is electrically connected with variable-frequency equipment, the variable-frequency equipment is used for directly realizing the power on and off of the water pump, and the variable-frequency PLC is used for controlling the action of the variable-frequency equipment;
and the power frequency PLC and the variable frequency PLC carry out data transmission in a wireless mode.
Further, the power frequency equipment is a circuit breaker.
Further, the frequency conversion equipment is a frequency converter.
Further, in the method for transmitting the two PLC data signals, S10, ip addresses of the power frequency PLC and the frequency conversion PLC are set to be 172.168.167.5 and 172.168.167.6 respectively;
s20, the power frequency PLC and the variable frequency PLC read the data of the current year, month, day, hour, minute and second and store the data in the V100 storage area;
s30, reading the current time data into a power frequency PLC30 by the variable frequency PLC and storing the current time data in a V200 storage area;
s40, comparing the local time data with the read time data of the variable frequency PLC40 in the power frequency PLC, and when the time of the power frequency PLC30 is consistent with that of the variable frequency PLC40, the communication state is normal; if the frequency conversion equipment 20 is inconsistent with the frequency conversion equipment 20, the fault exists, the frequency conversion equipment 20 is controlled to be disconnected, and the whole set of frequency conversion equipment 20 is stopped to avoid the expansion of the fault;
and S50, transmitting the data of the control frequency conversion equipment in the power frequency PLC to a V300 storage area in the frequency conversion PLC 40.
The invention has the beneficial effects that:
the power frequency PLC30 transmits a signal for controlling the frequency conversion equipment 20 to the frequency conversion PLC40 through wireless communication, so that the nearby power frequency PLC30 transmits a control signal to the frequency conversion PLC40, and further control of remote frequency conversion equipment is realized; the method and the device have the advantages that the use amount of the control cable is reduced, the investment is reduced, and whether the two PLCs are normal or not is calibrated.
Drawings
FIG. 1 is a schematic structural view of the present invention;
reference symbol comparison table:
the system comprises a power frequency device 10, a frequency conversion device 20, a power frequency PLC30, a frequency conversion PLC40 and a water pump 50.
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
In order to make the content of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
As shown in fig. 1, a combined frequency conversion control system and method for a opencast drainage system of an open pit coal mine comprises a power frequency device 10, a frequency conversion device 20, a power frequency PLC30, a frequency conversion PLC40 and a water pump 50;
the water pump 50 is electrically connected with the power frequency equipment 10 and the frequency conversion equipment 20 respectively, and the power frequency equipment 10 and the frequency conversion equipment 20 are connected into a three-phase circuit respectively;
the power frequency PLC30 is electrically connected with the power frequency equipment 10, the power frequency equipment 10 is used for directly realizing the power-on and power-off of the water pump 50, and the power frequency PLC30 is used for controlling the action of the power frequency equipment 10.
The variable frequency PLC40 is electrically connected with the variable frequency equipment 20, the variable frequency equipment 20 is used for directly realizing the power-on and power-off of the water pump 50, and the variable frequency PLC40 is used for controlling the variable frequency equipment 20 to act.
And the power frequency PLC30 and the frequency conversion PLC40 perform data transmission in a wireless mode.
The principle is as follows: the power frequency PLC30 transmits a signal for controlling the frequency conversion equipment 20 to the frequency conversion PLC40 through wireless communication, so that the nearby power frequency PLC30 transmits a control signal to the frequency conversion PLC40, and further control of remote frequency conversion equipment is realized; the use amount of the control cable is reduced, and the investment is reduced.
Further, the power frequency equipment 10 may be a circuit breaker;
further, the frequency conversion equipment 20 may be a frequency converter;
a method for transmitting two PLC data signals,
s10, setting ip addresses of power frequency PLC30 and frequency conversion PLC40 as 172.168.167.5 and 172.168.167.6 respectively;
s20, a power frequency PLC30 and a frequency conversion PLC40 read the data of the current year, month, day, hour, minute and second and store the data in a V100 storage area;
the specific codes are as follows:
s30, reading the current time data into the power frequency PLC30 by the variable frequency PLC40 and storing the current time data in a V200 storage area;
s40, comparing the local time data with the read time data of the variable-frequency PLC40 in the power-frequency PLC30, and when the time of the power-frequency PLC30 is consistent with the time of the variable-frequency PLC40, the communication state is normal; if the frequency conversion equipment 20 is inconsistent with the frequency conversion equipment 20, the fault exists, the frequency conversion equipment 20 is controlled to be disconnected, and the whole set of frequency conversion equipment 20 is stopped to avoid the expansion of the fault;
and S50, transmitting the data for controlling the variable frequency equipment 20 in the power frequency PLC30 to a V300 storage area in the variable frequency PLC 40.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (4)
1. A combined variable frequency control system of a surface emission system of an open pit coal mine is characterized by comprising power frequency equipment, variable frequency equipment, a power frequency PLC, a variable frequency PLC and a water pump;
the water pump is respectively and electrically connected with the power frequency equipment and the frequency conversion equipment, and the power frequency equipment and the frequency conversion equipment are respectively connected into the three-phase circuit;
the power frequency PLC is electrically connected with power frequency equipment, the power frequency equipment is used for directly realizing the power on/off of the water pump, and the power frequency PLC is used for controlling the power frequency equipment to act;
the variable-frequency PLC is electrically connected with variable-frequency equipment, the variable-frequency equipment is used for directly realizing the power on and off of the water pump, and the variable-frequency PLC is used for controlling the action of the variable-frequency equipment;
and the power frequency PLC and the variable frequency PLC carry out data transmission in a wireless mode.
2. The combined variable frequency control system of an open cut coal mine lighting drainage system of claim 1,
the power frequency equipment is a circuit breaker.
3. The combined variable frequency control system of an open cut coal mine lighting drainage system of claim 1,
the frequency conversion equipment is a frequency converter.
4. A method for transmitting two PLC data signals is characterized in that,
s10, setting ip addresses of the power frequency PLC and the frequency conversion PLC as 172.168.167.5 and 172.168.167.6 respectively;
s20, the power frequency PLC and the variable frequency PLC read the data of the current year, month, day, hour, minute and second and store the data in the V100 storage area;
s30, reading the current time data into a power frequency PLC30 by the variable frequency PLC and storing the current time data in a V200 storage area;
s40, comparing the local time data with the read time data of the variable frequency PLC40 in the power frequency PLC, and when the time of the power frequency PLC30 is consistent with that of the variable frequency PLC40, the communication state is normal; if the frequency conversion equipment 20 is inconsistent with the frequency conversion equipment 20, the fault exists, the frequency conversion equipment 20 is controlled to be disconnected, and the whole set of frequency conversion equipment 20 is stopped to avoid the expansion of the fault;
and S50, transmitting the data of the control frequency conversion equipment in the power frequency PLC to a V300 storage area in the frequency conversion PLC 40.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111342088.1A CN113931830A (en) | 2021-11-12 | 2021-11-12 | Combined type variable frequency control system and method for open-pit coal mine open-drainage system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111342088.1A CN113931830A (en) | 2021-11-12 | 2021-11-12 | Combined type variable frequency control system and method for open-pit coal mine open-drainage system |
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| CN202111342088.1A Pending CN113931830A (en) | 2021-11-12 | 2021-11-12 | Combined type variable frequency control system and method for open-pit coal mine open-drainage system |
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2021
- 2021-11-12 CN CN202111342088.1A patent/CN113931830A/en active Pending
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Application publication date: 20220114 |