CN113803238A - Control system and method for hot standby air compressor unit capable of achieving power-on self-starting - Google Patents
Control system and method for hot standby air compressor unit capable of achieving power-on self-starting Download PDFInfo
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- CN113803238A CN113803238A CN202111137990.XA CN202111137990A CN113803238A CN 113803238 A CN113803238 A CN 113803238A CN 202111137990 A CN202111137990 A CN 202111137990A CN 113803238 A CN113803238 A CN 113803238A
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- air compressor
- module
- compressor unit
- standby
- pressure
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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
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/02—Pumping installations or systems specially adapted for elastic fluids having reservoirs
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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
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/06—Combinations of two or more pumps
-
- 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
- F04B49/02—Stopping, starting, unloading or idling control
- F04B49/022—Stopping, starting, unloading or idling control by means of pressure
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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
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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
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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
- F04B49/20—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 by changing the driving speed
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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
- F04B51/00—Testing machines, pumps, or pumping installations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention provides a control system and a control method of a hot standby air compressor unit capable of being automatically started by power supply, wherein the control system comprises an air compressor unit and a comprehensive control unit, the air compressor unit comprises a main air compressor and a standby air compressor which are connected with an air storage tank through pipelines, and the main air compressor and the standby air compressor are both provided with a single-machine control module; the comprehensive control unit comprises a microcontroller, a first communication module, a switching value module, an Ethernet module and a backup power supply module, wherein the first communication module, the switching value module, the Ethernet module and the backup power supply module are connected with the microcontroller, the first communication module is connected with a single machine control module of the air compressor unit, and the switching value module is connected with a main air compressor monitor, a backup air compressor monitor and a mains supply monitor which are used for monitoring power supply signals. The invention realizes the self-starting of the air compressor after hot standby redundancy and power failure by communicating the microcontroller with the single controllers of the main air compressor and the standby air compressor, can communicate a whole plant monitoring system, can keep monitoring the control power supply and the commercial power supply signal of the air compressor unit system in real time after commercial power disappears, has simple integral structure and easy maintenance, reduces the occurrence of faults, and effectively ensures the normal operation of a hydropower station.
Description
Technical Field
The invention relates to the technical field of hydropower station air compressor unit control, in particular to a system and a method for controlling a hot standby air compressor unit capable of being automatically started by power supply.
Background
A control system of a hollow compressor unit in a hydropower station is an important component of auxiliary equipment of the hydropower station and aims to provide a pressure air source for an oil pressure device of a hydroelectric speed regulator, ensure the pressure of pressure oil of the speed regulator and guarantee the precondition that the speed regulator of the hydropower station, even a water turbine and a generator can normally operate when the hollow compressor unit normally operates.
At present, the traditional automatic control system technology of the air compressor unit is quite mature, the fault resolution capability and the fault processing capability are high, but no better solution exists how to realize the self-starting of the air compressor after the hot standby redundancy and the power failure, and the normal power generation of the whole hydropower station is influenced; meanwhile, the control power supply of the air compressor system and the monitoring of the commercial power supply signal cannot be realized with a whole plant monitoring system after power failure, and the requirement of stable operation of the current hydropower station cannot be met.
Disclosure of Invention
The invention aims to provide a control system of a hot standby air compressor unit capable of being automatically started by power supply, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention adopts the following technical scheme:
a power-on self-starting hot spare air compressor unit control system comprises:
the air compressor unit comprises a main air compressor and a standby air compressor which are connected with an air storage tank through pipelines, and the main air compressor and the standby air compressor are both provided with a single-machine control module; and
the comprehensive control unit comprises a microcontroller, and a first communication module, a switching value module, an Ethernet module and a backup power supply module which are connected with the microcontroller, wherein the first communication module is respectively connected with a single-machine control module of a main air compressor and a backup air compressor, and the switching value module is connected with a main air compressor monitor, a backup air compressor monitor and a mains supply monitor which are used for monitoring power supply signals.
Further, the stand-alone controller is connected with input module, output module and second communication module, input module is connected with emergency stop button, host computer temperature monitor, pressure transmitter and pressure switch respectively, output module is connected with loading valve and cold district fan, second communication module is connected with the converter of control air compressor machine operating power.
Preferably, the microcontroller is provided with a buzzer capable of alarming a fault of the air compressor unit.
Preferably, the stand-alone controller is further connected with a display module.
A control method of a power-on self-starting hot standby air compressor unit is realized based on the control system of the power-on self-starting hot standby air compressor unit, and specifically comprises the following steps:
setting a pressure limit value of an air compressor unit to enable the pressure limit value of a main air compressor to be within the range of the pressure limit value of a standby air compressor;
step two, controlling the frequency converter to accelerate from the operation power of 0Hz to the lower limit value of frequency through the single-machine controller and then continuously operating until internal pressure is built in an air storage tank communicated with the air compressor unit;
step three, controlling a loading valve to be opened through a single-machine controller, continuously loading and operating, monitoring a loading pressure value through a pressure transmitter, and adjusting the limit value of the operating frequency of the air compressor according to a PID algorithm;
step four, after the air compressor unit continuously works for a period of time, the standby air compressor is dormant, and the main air compressor runs at constant pressure;
and step five, monitoring the pipeline pressure in real time, and automatically waking up the standby air compressor to start air supply when the main air compressor is abnormal and the pipeline pressure is gradually reduced to a pressure value for dormancy waking up.
According to the technical scheme, the microcontroller is communicated with the single-machine controllers of the main air compressor and the standby air compressor, so that the air compressors are automatically started after hot standby redundancy and power failure are realized, the whole plant monitoring system can be communicated, the control power supply and the mains supply signals of the air compressor unit system can be monitored in real time after mains supply disappears, the whole structure is simple, the maintenance is easy, the occurrence of faults is reduced, and the normal operation of a hydropower station is effectively ensured.
Drawings
FIG. 1 is a schematic diagram of the integrated control unit of the present invention;
FIG. 2 is a schematic structural diagram of a single-machine controller of the air compressor according to the present invention;
FIG. 3 is a flow chart illustrating steps of the control method according to the present invention;
Detailed Description
A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
The control system of the hot standby air compressor unit capable of being automatically started after power is obtained as shown in fig. 1 comprises an air compressor unit and a comprehensive control unit, wherein the air compressor unit comprises a main air compressor and a standby air compressor which are connected with an air storage tank through pipelines, and the main air compressor and the standby air compressor are both provided with a single-machine control module; the comprehensive control unit comprises a microcontroller, and a first communication module, a switching value module, an Ethernet module and a backup power supply module which are connected with the microcontroller, wherein the first communication module is respectively connected with a single-machine control module of a main air compressor and a backup air compressor, and the switching value module is connected with a main air compressor monitor, a backup air compressor monitor and a mains supply monitor which are used for monitoring power supply signals.
Specifically, as shown in fig. 2, the stand-alone controller is connected with an input module, an output module and a second communication module, the input module is respectively connected with an emergency stop button, a host temperature monitor, a pressure transmitter and a pressure switch, the output module is connected with a loading valve and a cold area fan, and the second communication module is connected with a frequency converter for controlling the operation power of the air compressor; in specific use, a power loop of the air compressor unit consists of an air circuit breaker, a frequency converter and an air compressor motor, wherein the frequency converter can carry out frequency conversion transformation on the air compressor so as to stabilize air supply pressure; and the cooling fan power loop consists of an air circuit breaker, a contactor and a cooling fan.
Meanwhile, the microcontroller of the preferred embodiment is provided with a buzzer capable of alarming the fault of the air compressor unit, so that a worker can quickly deal with the fault and normal operation of a hydropower station is ensured; the single-machine controller is also connected with a display module, and a co-homed visual interface is convenient for co-workers to operate and inquire information.
The control method for the hot standby air compressor unit capable of being automatically started by power supply shown in fig. 3 is realized based on the control system for the hot standby air compressor unit capable of being automatically started by power supply, and specifically comprises the following steps:
s1, setting a pressure limit value of the air compressor unit to enable the pressure limit value of the main air compressor to be within the range of the pressure limit value of the standby air compressor;
specifically, the set value of the upper pressure limit of the main air compressor is lower than the set value of the upper pressure limit of the standby air compressor, and the set value of the lower pressure limit of the main air compressor is higher than the set value of the lower pressure limit of the standby air compressor.
S2, controlling the frequency converter to accelerate from 0Hz operation power to a frequency lower limit value through the single-machine controller and then continuously operating until internal pressure is built in an air storage tank communicated with the air compressor unit;
s3, controlling the loading valve to be opened through the single-machine controller, continuously loading and operating, monitoring the loading pressure value through the pressure transmitter, and adjusting the limit value of the operating frequency of the air compressor according to the PID algorithm;
in specific use, when the loading pressure is continuously higher than the unloading pressure, the system controls the air compressor to sleep until the loading pressure is lower than the sleep awakening pressure, and then the air compressor is awakened and continues to operate;
s4, after the air compressor unit continuously works for a period of time, the standby air compressor is dormant, and the main air compressor runs at a constant pressure;
and S5, monitoring the pipeline pressure in real time, and automatically waking up the standby air compressor to start air supply when the main air compressor is abnormal and the pipeline pressure is gradually reduced to a pressure value for waking up from dormancy.
The preferred embodiment adopts the microcontroller to communicate with the single-machine controllers of the main air compressor and the standby air compressor, if the mains supply is powered off, the microcontroller has the electricity storage function by virtue of the backup power module, so that the control power supply and the mains supply signal of the air compressor set system can be kept monitored after the mains supply disappears, the communication relation is kept, the recording and the analysis are carried out, the fault type of the previous shutdown is judged by the analysis result of the micro-control root moment after the mains supply is recovered, and if the fault type is caused by the mains supply disappearance, the main air compressor can be automatically started, so that the normal supply of an air system of a hydropower station and the normal operation of the hydropower station are ensured.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims (5)
1. The utility model provides a get electric self-starting's hot spare air compressor unit control system which characterized in that includes:
the air compressor unit comprises a main air compressor and a standby air compressor which are connected with an air storage tank through pipelines, and the main air compressor and the standby air compressor are both provided with a single-machine control module; and
the comprehensive control unit comprises a microcontroller, and a first communication module, a switching value module, an Ethernet module and a backup power module which are connected with the microcontroller, wherein the first communication module is respectively connected with a single-machine control module of a main air compressor and a backup air compressor, the switching value module is connected with a main air compressor monitor, a backup air compressor monitor and a commercial power monitor which are used for monitoring power signals, and the Ethernet module is interconnected with a whole plant monitoring network.
2. The electric-power-on self-starting hot standby air compressor unit control system according to claim 1, wherein the stand-alone controller is connected with an input module, an output module and a second communication module, the input module is respectively connected with an emergency stop button, a host temperature monitor, a pressure transmitter and a pressure switch, the output module is connected with a loading valve and a cold area fan, and the second communication module is connected with a frequency converter for controlling the running power of an air compressor.
3. The powered self-starting hot-standby air compressor unit control system according to claim 1, wherein the microcontroller is provided with a buzzer capable of alarming for a failure of the air compressor unit.
4. The electric self-starting hot-standby air compressor unit control system according to claim 1, wherein a display module is further connected to the stand-alone controller.
5. A control method of a power-on self-starting hot standby air compressor unit is realized based on the control system of the power-on self-starting hot standby air compressor unit as claimed in any one of claims 1 to 4, and is characterized by specifically comprising the following steps:
setting a pressure limit value of an air compressor unit to enable the pressure limit value of a main air compressor to be within the range of the pressure limit value of a standby air compressor;
step two, controlling the frequency converter to accelerate from the operation power of 0Hz to the lower limit value of frequency through the single-machine controller and then continuously operating until internal pressure is built in an air storage tank communicated with the air compressor unit;
step three, controlling a loading valve to be opened through a single-machine controller, continuously loading and operating, monitoring a loading pressure value through a pressure transmitter, and adjusting the limit value of the operating frequency of the air compressor according to a PID algorithm;
step four, after the air compressor unit continuously works for a period of time, the standby air compressor is dormant, and the main air compressor runs at constant pressure;
and step five, monitoring the pipeline pressure in real time, and automatically waking up the standby air compressor to start air supply when the main air compressor is abnormal and the pipeline pressure is gradually reduced to a pressure value for dormancy waking up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111137990.XA CN113803238A (en) | 2021-09-27 | 2021-09-27 | Control system and method for hot standby air compressor unit capable of achieving power-on self-starting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111137990.XA CN113803238A (en) | 2021-09-27 | 2021-09-27 | Control system and method for hot standby air compressor unit capable of achieving power-on self-starting |
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| Publication Number | Publication Date |
|---|---|
| CN113803238A true CN113803238A (en) | 2021-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111137990.XA Pending CN113803238A (en) | 2021-09-27 | 2021-09-27 | Control system and method for hot standby air compressor unit capable of achieving power-on self-starting |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0593225A1 (en) * | 1992-10-13 | 1994-04-20 | Ingersoll-Rand Company | Method and apparatus for controlling a system of compressors to achieve load sharing |
| CN202203096U (en) * | 2011-08-16 | 2012-04-25 | 四川卓越科技工程有限责任公司 | Control system for medium-pressure air compressor of hydropower station |
| CN202228325U (en) * | 2011-08-30 | 2012-05-23 | 成都锐达自动控制有限公司 | Medium voltage air compressor intelligent control system of hydropower station |
| CN204572411U (en) * | 2015-03-07 | 2015-08-19 | 云南能投威士科技股份有限公司 | Water power plant low pressure air compressor combined control system |
| CN210484060U (en) * | 2019-07-19 | 2020-05-08 | 山东金岭矿业股份有限公司 | Air compressor unit constant pressure air supply joint control system |
-
2021
- 2021-09-27 CN CN202111137990.XA patent/CN113803238A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0593225A1 (en) * | 1992-10-13 | 1994-04-20 | Ingersoll-Rand Company | Method and apparatus for controlling a system of compressors to achieve load sharing |
| CN202203096U (en) * | 2011-08-16 | 2012-04-25 | 四川卓越科技工程有限责任公司 | Control system for medium-pressure air compressor of hydropower station |
| CN202228325U (en) * | 2011-08-30 | 2012-05-23 | 成都锐达自动控制有限公司 | Medium voltage air compressor intelligent control system of hydropower station |
| CN204572411U (en) * | 2015-03-07 | 2015-08-19 | 云南能投威士科技股份有限公司 | Water power plant low pressure air compressor combined control system |
| CN210484060U (en) * | 2019-07-19 | 2020-05-08 | 山东金岭矿业股份有限公司 | Air compressor unit constant pressure air supply joint control system |
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