CN102644585B - Air compressor hybrid control system and method - Google Patents
Air compressor hybrid control system and method Download PDFInfo
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- CN102644585B CN102644585B CN201210122212.8A CN201210122212A CN102644585B CN 102644585 B CN102644585 B CN 102644585B CN 201210122212 A CN201210122212 A CN 201210122212A CN 102644585 B CN102644585 B CN 102644585B
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- 238000005516 engineering process Methods 0.000 claims description 3
- 230000000295 complement effect Effects 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 76
- 239000010865 sewage Substances 0.000 description 6
- 238000005273 aeration Methods 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
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Abstract
The invention discloses an air compressor hybrid control system, which comprises a main PLC (programmable logic controller) and plural local PLCs. The main PLC is connected with a main touch screen via an MPI (multi point interface) bus and with a monitoring computer via a PROFIBUS (process field bus); and each local PLC is connected with the main PLC via a PROFIBUS, with one local touch screen via an MPI bus and with a regulating valve, an emptying valve, a flow meter, a temperature transmitter, a pressure transmitter and a servo controller arranged on one air compressor via a PROFIBUS. The inventive system has characteristics of reasonable design, stable operation and long service life. The inventive method adopts integrated and independent control modes, realizes complementary advantages, improves compressor working efficiency, effectively realizes energy-saving and emission reduction, and lowers operation costs.
Description
Technical field
The present invention relates to a kind of system of control system of gas compression machine, specifically, is a kind of based on unified and separate gas compressor hybrid control system; The invention still further relates to the mixing control method of aforementioned gas compressor.
Background technique
The industries such as the sewage treatment in China city, shipbuilding paint spraying, chemical industry, mining, are all used air compressor, and in use constant pressure and flow is most important.Wherein sewage treatment industry is in whole biological treatment process, and by aeration, having maintained dissolved oxygen environment is one of them very important link.Gas compressor, as the machinery often adopting in aeration in sewage treatment link, plays an important role to the normal operation of sewage treatment works; Gas compressor is also the link of energy consumption maximum simultaneously, so the Precise control of gas compressor system is significant to the energy-saving run of whole sewage treatment works.The constant pressure and flow of the industry compressors such as shipbuilding paint spraying, chemical industry, mining has a great impact the working condition of load, working efficiency and workmanship, so the accurate control of gas compressor system is significant to the quality of Security, high efficiency and the product of the industries such as raising shipbuilding paint spraying, chemical industry, mining.
The aeration blower that at present controlling method of air compressor is used as sewage treatment and the multistage gas compressor of industrial application are all by control mode independently.Its advantage of unified control mode based on master control is to control simple easily realization, and under the working state of the greater efficiency that unit can keep, unit wearing and tearing are less.Shortcoming is that the abnormal state main controller of each unit can not reflect and make action in time, and this is unfavorable for the timely solution of potential faults.And the abnormal state main controller of independent control mode unit can not reflect and make action in time, this is unfavorable for the timely solution of potential faults.
Summary of the invention
Technical problem to be solved by this invention is the deficiency for current gas compressor controlling method, design more reasonable, can realize the unified and independent hybrid control system of controlling the gas compressor combine.
Another technical problem to be solved by this invention is also to provide application said system to carry out the method for the mixing control of gas compressor.
Problem to be solved by this invention is to realize by following technological scheme.The present invention is a kind of hybrid control system of gas compressor, is characterized in:
This system comprises master controller PLC and some Local Controller PLC;
Master controller PLC is connected with main touch screen by MPI bus, and is connected with supervisory control comuter by PROFIBUS bus; Each Local Controller PLC is all connected with master controller PLC by PROFIBUS bus;
Each Local Controller PLC by MPI bus with one on the spot touch screen be connected, and by PROFIBUS bus be located at modulating valve, atmospheric valve, flowmeter, temperature transmitter, pressure transmitter and a servocontroller on gas compressor and be connected.
Technical problem to be solved by this invention can also further realize by following technological scheme.The mixing control method that the invention also discloses a kind of gas compressor, is characterized in:
The hybrid control system that the method is applied described in above technological scheme is mixed control;
Hybrid control system presets a gas flow value in master controller PLC according to concrete working condition before starting, when system starts, master controller PLC detects before each gas compressor starts whether have fault do scan round; During system operation, according to measured value and setting value, compare to determine whether start next gas compressor, and adopt the output power of conventional pid control algorithm adjustments of gas compressor; By the adjusting of gas compressor entry guide vane aperture, carry out the operational efficiency of compressor bank, under telecontrol mode, by master controller PLC, adopt Intelligent constant-voltage regulation technology, according to the demand of house steward's air inlet and gas transmission pipeline net work back pressure, regulate the aperture of exit guide blade;
Each gas compressor starts by platform by the authority order of setting; Master controller PLC only controls a gas compressor at synchronization, according to pre-determined priority facility, in the process of adjust operation gas compressor number of units, adopt the flow-compensated impact reducing to greatest extent gas transmission pipeline net work of setting in master controller PLC;
In hybrid control system running, when there is the situation that air demand cannot be satisfied the demand, increase the air feed output of gas compressor, in preference, be that the 1st gas compressor gas supply capacity is when inadequate, it is the 2nd gas compressor to preference that master controller PLC sends enabled instruction, and activation starts the compensation timer of master controller PLC, it is that the air quantity of the 1st gas compressor reduces that master controller PLC now still controls preference, until regularly finish, increase as required again preference and be the 1st gas compressor wind supply quantity, until it arrives maximum wind supply quantity, then the gas compressor that is the 2nd by master controller PLC control preference is worked, by that analogy until to control preference be that n(n is positive integer) gas compressor work, when needs reduce air demand, first reducing preference is that most end grade is also that preference is the air demand of the gas compressor of n, according to priority reduce one by one from low to high again, until reduce the air demand that preference is the 1st gas compressor, stop again preference and be the operation of the 2nd gas compressor, stable to guarantee system air feed,
In gas compressor, have one to break down or in fault critical point, Local Controller PLC will automatically regulate this gas compressor running state to reach and eliminates or avoid fault to occur; When separate unit gas compressor unit on-the-job satisfaction needs, by its Local Controller PLC, realize operation and automatically control;
In gas compressor course of normal operation, according to the variation of atmosphere environment, load and exit guide blade aperture, by the variation of automatic adjusting entry guide vane angle, regulate the direction of charge flow rate, taking into account on the basis of flow control, carry out efficiency-adjusted, equipment is operated under optimum Working;
During shutdown, send instruction stop unit by platform by master controller PLC, Local Controller PLC stops each gas compressor by the utmost points such as preference of setting shutdown sequence from low to high.
Compared with prior art, System and method for of the present invention has the following advantages:
1, system of the present invention is meeting under the prerequisite of proof load demand gas compressor, realizes the optimum output of unit and pipe network steady air current, thereby improves the stability of system and the working life of equipment.
2, system of the present invention has been avoided the drawback that manual tune easily causes surge to occur, and energy loss is dropped to minimum, reaches energy-conservation object.
3, the inventive method adopts unified and independent control mode, has realized mutual supplement with each other's advantages, has improved the working efficiency of compressor, effectively realizes energy-saving and emission-reduction, cuts operating costs.When demand gas flow is greater than current gas compressor peak output, system starts auxiliary gas compressor automatically, and adjusts the output power of whole system all gas compressor, to realize moving in safe and efficient power save mode of system.Master control judgement entire system operation conditions during unified control, and the adjustment to set state according to actual operating state.Independent control is to control separately for every unit, and when certain unit is under a kind of state that moves critical condition, the running state that autonomous control system can automatic adjusting machine group, realizes the safe operation of unit.Adopt control mode unified and that independently combine both to guarantee the operation of the stable and optimum efficiency of system, can improve again Security and fault-free average time of gas compressor, reach the energy-saving effect of system.
Accompanying drawing explanation
Fig. 1 is a kind of system schematic block diagram of system of the present invention;
Fig. 2 is that block diagram is shown in the mixing control of the inventive method.
Embodiment
Referring to accompanying drawing, further describe concrete technological scheme of the present invention, so that those skilled in the art understands the present invention further, and do not form the restriction to its right.
Embodiment 1, with reference to Fig. 1, and a kind of hybrid control system of gas compressor,
This system comprises master controller PLC and some Local Controller PLC;
Master controller PLC is connected with main touch screen by MPI bus, and is connected with supervisory control comuter by PROFIBUS bus; Each Local Controller PLC is all connected with master controller PLC by PROFIBUS bus;
Each Local Controller PLC by MPI bus with one on the spot touch screen be connected, and by PROFIBUS bus be located at modulating valve, atmospheric valve, flowmeter, temperature transmitter, pressure transmitter and a servocontroller on gas compressor and be connected.
Embodiment 2, with reference to Fig. 1, and 2, a kind of mixing control method of gas compressor,
Hybrid control system described in the method Application Example 1 is mixed control;
Hybrid control system presets a gas flow value in master controller PLC according to concrete working condition before starting, when system starts, master controller PLC detects before each gas compressor starts whether have fault do scan round; During system operation, according to measured value and setting value, compare to determine whether start next gas compressor, and adopt the output power of conventional pid control algorithm adjustments of gas compressor; By the adjusting of gas compressor entry guide vane aperture, carry out the operational efficiency of compressor bank, under telecontrol mode, by master controller PLC, adopt Intelligent constant-voltage regulation technology, according to the demand of house steward's air inlet and gas transmission pipeline net work back pressure, regulate the aperture of exit guide blade;
Each gas compressor starts by platform by the authority order of setting; Master controller PLC only controls a gas compressor at synchronization, according to pre-determined priority facility, in the process of adjust operation gas compressor number of units, adopt the flow-compensated impact reducing to greatest extent gas transmission pipeline net work of setting in master controller PLC;
In hybrid control system running, when there is the situation that air demand cannot be satisfied the demand, increase the air feed output of gas compressor, in preference, be that the 1st gas compressor gas supply capacity is when inadequate, it is the 2nd gas compressor to preference that master controller PLC sends enabled instruction, and activation starts the compensation timer of master controller PLC, it is that the air quantity of the 1st gas compressor reduces that master controller PLC now still controls preference, until regularly finish, increase as required again preference and be the 1st gas compressor wind supply quantity, until it arrives maximum wind supply quantity, then the gas compressor that is the 2nd by master controller PLC control preference is worked, by that analogy until control the gas compressor work that preference is n, when needs reduce air demand, first reducing preference is that most end grade is also that preference is the air demand of the gas compressor of n, according to priority reduce one by one from low to high again, until reduce the air demand that preference is the 1st gas compressor, stop again preference and be the operation of the 2nd gas compressor, stable to guarantee system air feed,
In gas compressor, have one to break down or in fault critical point, Local Controller PLC will automatically regulate this gas compressor running state to reach and eliminates or avoid fault to occur; When separate unit gas compressor unit on-the-job satisfaction needs, by its Local Controller PLC, realize operation and automatically control;
In gas compressor course of normal operation, according to the variation of atmosphere environment, load and exit guide blade aperture, by the variation of automatic adjusting entry guide vane angle, regulate the direction of charge flow rate, taking into account on the basis of flow control, carry out efficiency-adjusted, equipment is operated under optimum Working;
During shutdown, send instruction stop unit by platform by master controller PLC, Local Controller PLC stops each gas compressor by the utmost points such as preference of setting shutdown sequence from low to high.
Claims (1)
1. a hybrid control system for gas compressor, is characterized in that:
This system comprises master controller PLC and some Local Controller PLC;
Master controller PLC is connected with main touch screen by MPI bus, and is connected with supervisory control comuter by PROFIBUS bus; Each Local Controller PLC is all connected with master controller PLC by PROFIBUS bus;
Each Local Controller PLC by MPI bus with one on the spot touch screen be connected, and by PROFIBUS bus be located at modulating valve, atmospheric valve, flowmeter, temperature transmitter, pressure transmitter and a servocontroller on gas compressor and be connected;
The method that the hybrid control system of application of aforementioned is mixed control is as follows:
Hybrid control system presets a gas flow value in master controller PLC according to concrete working condition before starting, when system starts, master controller PLC detects before each gas compressor starts whether have fault do scan round; During system operation, according to measured value and setting value, compare to determine whether start next gas compressor, and adopt the output power of conventional pid control algorithm adjustments of gas compressor; By the adjusting of gas compressor entry guide vane aperture, carry out the operational efficiency of compressor bank, under telecontrol mode, by master controller PLC, adopt Intelligent constant-voltage regulation technology, according to the demand of house steward's air inlet and gas transmission pipeline net work back pressure, regulate the aperture of exit guide blade;
Each gas compressor starts by platform by the authority order of setting; Master controller PLC only controls a gas compressor at synchronization, according to pre-determined priority facility, in the process of adjust operation gas compressor number of units, adopt the flow-compensated impact reducing to greatest extent gas transmission pipeline net work of setting in master controller PLC;
In hybrid control system running, when there is the situation that air demand cannot be satisfied the demand, increase the air feed output of gas compressor, in preference, be that the 1st gas compressor gas supply capacity is when inadequate, it is the 2nd gas compressor to preference that master controller PLC sends enabled instruction, and activation starts the compensation timer of master controller PLC, it is that the air quantity of the 1st gas compressor reduces that master controller PLC now still controls preference, until regularly finish, increase as required again preference and be the 1st gas compressor wind supply quantity, until it arrives maximum wind supply quantity, then the gas compressor that is the 2nd by master controller PLC control preference is worked, by that analogy until control the gas compressor work that preference is n, when needs reduce air demand, first reducing preference is that most end grade is also that preference is the air demand of the gas compressor of n, according to priority reduce one by one from low to high again, until reduce the air demand that preference is the 1st gas compressor, stop again preference and be the operation of the 2nd gas compressor, stable to guarantee system air feed,
In gas compressor, have one to break down or in fault critical point, Local Controller PLC will automatically regulate this gas compressor running state to reach and eliminates or avoid fault to occur; When separate unit gas compressor unit on-the-job satisfaction needs, by its Local Controller PLC, realize operation and automatically control;
In gas compressor course of normal operation, according to the variation of atmosphere environment, load and exit guide blade aperture, by the variation of automatic adjusting entry guide vane angle, regulate the direction of charge flow rate, taking into account on the basis of flow control, carry out efficiency-adjusted, equipment is operated under optimum Working;
During shutdown, send instruction stop unit by platform by master controller PLC, Local Controller PLC stops each gas compressor by the utmost points such as preference of setting shutdown sequence from low to high.
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| CN201210122212.8A CN102644585B (en) | 2012-04-25 | 2012-04-25 | Air compressor hybrid control system and method |
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| CN102901191A (en) * | 2012-10-26 | 2013-01-30 | 江苏兆胜空调有限公司 | System and method for controlling marine module water chilling unit |
| CN104214081B (en) * | 2013-06-05 | 2016-05-11 | 中国石油天然气股份有限公司 | Air compressor set hybrid control method |
| CN104179707B (en) * | 2014-08-07 | 2016-05-04 | 上海英格索兰压缩机有限公司 | The control method of air compression system and system |
| CN106246525B (en) * | 2016-08-31 | 2019-02-01 | 珠海格力电器股份有限公司 | Compressor operation control method and device |
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| CN110617207A (en) * | 2019-09-18 | 2019-12-27 | 长兴旗滨玻璃有限公司 | Automatic control method, device and system for air compressor and computer readable medium |
| CN110905792B (en) * | 2019-11-28 | 2021-01-05 | 浙江精工能源科技集团有限公司 | Air compressor control system and method based on energy internet cloud computing |
| CN111692087A (en) * | 2020-07-08 | 2020-09-22 | 中国船舶电站设备有限公司 | Low-pressure control system of LNG (liquefied Natural gas) supply unit |
| CN115414772B (en) * | 2022-08-30 | 2023-08-29 | 内蒙古伊东集团东兴化工有限责任公司 | VCM compression process device |
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