CN114857071A - Compressor anti-surge control method, device, equipment and system - Google Patents
Compressor anti-surge control method, device, equipment and system Download PDFInfo
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- CN114857071A CN114857071A CN202110147234.9A CN202110147234A CN114857071A CN 114857071 A CN114857071 A CN 114857071A CN 202110147234 A CN202110147234 A CN 202110147234A CN 114857071 A CN114857071 A CN 114857071A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/02—Surge control
- F04D27/0207—Surge control by bleeding, bypassing or recycling fluids
- F04D27/0215—Arrangements therefor, e.g. bleed or by-pass valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/02—Surge control
- F04D27/0253—Surge control by throttling
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Abstract
The embodiment of the application discloses a compressor anti-surge control method, device, equipment and system, and belongs to the technical field of oil and gas storage and transportation. The method is applied to the control equipment and comprises the following steps: acquiring power supply voltage corresponding to a driving motor, wherein the driving motor is used for driving a compressor to rotate under the action of the power supply voltage; controlling a pneumatic valve to be opened in response to the fact that the power supply voltage is lower than a preset voltage threshold, and enabling high-pressure gas at an outlet pipeline of the compressor to flow back to an inlet pipeline of the compressor through an auxiliary anti-surge pipeline in the opening state of the pneumatic valve; and controlling the pneumatic valve to close in response to the supply voltage being higher than a preset voltage threshold. When the control equipment detects that the power supply voltage of the motor fluctuates, the pressure and the flow at the inlet and the outlet of the compressor can be quickly balanced by controlling the opening of the pneumatic valve, the extremely-fast reduction of the rotating speed of the compressor is avoided, the inlet flow of the compressor is timely supplemented, the compressor is prevented from surging and stopping due to the temporary drop of the power supply voltage, and the safe and stable operation of a compressor unit is ensured.
Description
Technical Field
The embodiment of the application relates to the technical field of oil and gas storage and transportation, in particular to a compressor anti-surge control method, device, equipment and system.
Background
The compressor is a driven fluid machine for lifting low-pressure gas into high-pressure gas, and is used for compressing the low-pressure gas flowing into an inlet pipeline of the compressor into high-pressure gas and discharging the high-pressure gas through an outlet pipeline of the compressor in the oil-gas transportation process, so that the compressor plays a very important role in the oil-gas transportation process.
In the related technology, in the actual operation process of the compressor unit, if the power supply voltage of the compressor unit temporarily drops, a motor for driving the compressor to rotate loses power instantly, the rotating speed of the compressor unit drops at a very high speed under the load action of the compressor unit, and the normal supply of the peripheral power supply can be recovered after short fluctuation. During the period, the pipeline of the unit anti-surge system is too long, so that the inlet flow of the compressor unit is not timely supplemented, and the compressor unit is in surge shutdown due to too low flow.
Disclosure of Invention
The embodiment of the application provides a compressor anti-surge control method, device, equipment and system. The surge phenomenon of the compressor caused by the power supply voltage can be avoided temporarily, and the technical scheme is as follows:
in one aspect, an embodiment of the present application provides a compressor anti-surge control method, which is applied to a control device, and includes:
acquiring power supply voltage corresponding to a driving motor, wherein the driving motor is used for driving a compressor to rotate under the action of the power supply voltage;
in response to the power supply voltage being lower than a preset voltage threshold, controlling a pneumatic valve to be opened, wherein in the open state of the pneumatic valve, high-pressure gas at an outlet pipeline of the compressor flows back to an inlet pipeline of the compressor through an auxiliary anti-surge pipeline;
controlling the pneumatic valve to close in response to the supply voltage being above the preset voltage threshold.
In an optional embodiment, an orifice plate is arranged behind the pneumatic valve, and the aperture of the orifice plate is adjustable;
after controlling the pneumatic valve to be opened in response to the power supply voltage being lower than a preset voltage threshold, the method further comprises:
obtaining a current gas flow rate in the auxiliary anti-surge pipeline;
and adjusting the aperture of the orifice plate according to the current gas flow rate, wherein the orifice plate is used for adjusting the gas flow rate in the anti-surge pipeline.
In an alternative embodiment, said adjusting the aperture of said orifice plate according to said current gas flow rate comprises:
in response to the current gas flow rate being greater than a first preset flow rate threshold value, controlling to reduce the aperture of the orifice plate, and reducing the gas flow rate in the auxiliary anti-surge pipeline by reducing the aperture of the orifice plate;
and responding to the current gas flow rate being smaller than a second preset flow rate threshold value, controlling to increase the aperture of the throttle orifice plate, and increasing the gas flow rate in the auxiliary anti-surge pipeline by increasing the aperture of the throttle orifice plate, wherein the second preset flow rate threshold value is smaller than the first preset flow rate threshold value.
In an alternative embodiment, said controlling said pneumatic valve to close in response to said supply voltage being above said preset voltage threshold comprises:
and responding to the condition that the power supply voltage is higher than the preset voltage threshold value and the time length of the power supply voltage recovered to be higher than the preset voltage threshold value reaches a preset time length threshold value, and controlling the pneumatic valve to be closed.
In an alternative embodiment, the control pneumatic valve is open and comprises:
sending an opening instruction to the pneumatic valve, wherein the pneumatic valve is used for opening the valve when receiving the opening instruction;
the controlling the pneumatic valve to close includes:
sending a closing command to the pneumatic valve, wherein the pneumatic valve is used for closing the valve when receiving the closing command.
In another aspect, an embodiment of the present application provides a compressor surge-proof control apparatus, which is applied to a control device, and includes:
the first acquisition module is used for acquiring power supply voltage corresponding to a driving motor, and the driving motor is used for driving the compressor to rotate under the action of the power supply voltage;
the first control module is used for responding to the condition that the power supply voltage is lower than a preset voltage threshold value, controlling a pneumatic valve to be opened, and under the opening condition of the pneumatic valve, high-pressure gas at an outlet pipeline of the compressor flows back to an inlet pipeline of the compressor through an auxiliary anti-surge pipeline;
and the second control module is used for responding to the condition that the power supply voltage is higher than the preset voltage threshold value and controlling the pneumatic valve to be closed.
In another aspect, the present embodiments provide a control apparatus including a processor and a memory, where the memory stores at least one instruction, and the at least one instruction is executed by the processor to implement the compressor anti-surge control method according to the above aspect.
In another aspect, embodiments of the present application provide a compressor anti-surge control system including a compressor, a motor, a compressor inlet line, a compressor outlet line, a unit anti-surge line, an auxiliary anti-surge line, a pneumatic valve, and a control device;
the motor is electrically connected with the compressor and is used for driving the compressor to rotate;
the compressor is used for compressing low-pressure gas flowing into the inlet pipeline of the compressor to obtain high-pressure gas, and discharging the high-pressure gas through the outlet pipeline of the compressor;
the unit anti-surge line is used for connecting the compressor inlet line and the compressor outlet line, and the unit anti-surge line is used for providing a flow channel for the high-pressure gas to flow back from the compressor outlet line to the compressor inlet line under a flow state;
the auxiliary anti-surge line connecting the compressor inlet line and the compressor outlet line, the auxiliary anti-surge line for providing a flow passage for the high-pressure gas to flow back from the compressor outlet line to the compressor inlet line under a flow-through condition, wherein a length of the auxiliary anti-surge line is less than a length of the plant anti-surge line;
the pneumatic valve is arranged on the auxiliary anti-surge pipeline and used for controlling the on-off state of the auxiliary anti-surge pipeline;
the control device is electrically connected with the pneumatic valve, and is used for controlling the pneumatic valve to be opened when the reduction of the power supply voltage of the motor is detected and controlling the pneumatic valve to be closed when the restoration of the power supply voltage of the motor is detected.
In an alternative embodiment, the anti-surge system further comprises an orifice plate;
the orifice plate is connected with the pneumatic valve and used for adjusting the gas flow rate in the auxiliary anti-surge pipeline.
In an alternative embodiment, the pneumatic valve is provided with a preset flow coefficient, the preset flow coefficient is between 100 and 300, and the length of the auxiliary anti-surge pipeline is less than or equal to 30 m.
The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:
in the embodiment of the application, through increasing supplementary anti-surge pipeline and pneumatic valve in original compressor unit control system, when controlgear detected the supply voltage of motor and taken place undulantly, open through controlling the pneumatic valve, make the gas of compressor outlet pipeline department can flow back to compressor inlet pipeline department through supplementary anti-surge pipeline, the pressure and the flow of compressor exit are balanced fast, avoid the very fast decline of compressor rotational speed, in time supply the inlet flow of compressor, avoid the compressor to cause compressor surge to shut down because supply voltage temporarily drops, compressor unit safety and stability operation has been guaranteed.
Drawings
FIG. 1 illustrates a compressor rack anti-surge control system according to an exemplary embodiment of the present application;
FIG. 2 illustrates a flow chart of a compressor anti-surge control method shown in an exemplary embodiment of the present application;
FIG. 3 illustrates a flow chart of a compressor anti-surge control method according to another exemplary embodiment of the present application;
FIG. 4 is a block diagram illustrating a compressor unit surge protection control apparatus according to an exemplary embodiment of the present application;
fig. 5 shows a schematic structural diagram of a computer device provided in an exemplary embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
Reference herein to "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
In the related technology, a special anti-surge system is designed between an inlet pipeline and an outlet pipeline of a long-distance natural gas pipeline compressor unit, wherein the special anti-surge system comprises an anti-surge system pipeline and an anti-surge valve, and the length of the anti-surge system pipeline is about 200 meters; in the actual operation process, because the power supply voltage of the compressor unit drops temporarily, the motor loses power within 400ms-700ms usually, and the rotating speed of the compressor unit drops at a very high speed under the load action of the compressor unit; the high-pressure gas at the outlet pipeline of the compressor can flow back to the inlet pipeline of the compressor through the pipeline of the anti-surge system by opening the anti-surge valve during the period so as to balance the inlet and outlet flow of the compressor unit and prevent the system from surging.
Obviously, in the related art, the pipeline of the anti-surge system is too long to respond quickly, so that the inlet flow of the compressor unit is not ready to be supplemented, and the compressor unit is in surge shutdown due to the fact that the inlet flow is too low.
In view of the problems in the related art, the present application provides a new compressor rack anti-surge control system, as shown in fig. 1, which illustrates a compressor rack anti-surge control system shown in one exemplary embodiment of the present application, including a compressor 101, a motor 102, a compressor inlet line 103, a compressor outlet line 104, a rack anti-surge line 105, an auxiliary anti-surge line 106, a pneumatic valve 107, and a control device (not shown in the drawings).
The motor 102 is electrically connected with the compressor 101 and is used for driving the compressor 101 to rotate; the compressor 101 is used for compressing low-pressure gas flowing in through a compressor inlet pipeline 103 to obtain high-pressure gas, and discharging the high-pressure gas through a compressor outlet pipeline 104; the crew anti-surge line 105 is used for connecting the compressor inlet line 103 and the compressor outlet line 104, and the crew anti-surge line 105 is used for providing a flow channel for high-pressure gas to flow back from the compressor outlet line 104 to the compressor inlet line 103 in a flowing state; an auxiliary anti-surge line 106 connecting the compressor inlet line 103 and the compressor outlet line 104, the auxiliary anti-surge line 106 for providing a flow passage for the high-pressure gas to flow back from the compressor outlet line 104 to the compressor inlet line 103 under a flow-through condition, wherein the length of the auxiliary anti-surge line 106 is smaller than the length of the train anti-surge line 105; the pneumatic valve 107 is arranged on the auxiliary anti-surge pipeline 106 and is used for controlling the on-off state of the auxiliary anti-surge pipeline 106; a control device is electrically connected to the pneumatic valve 107 for controlling the pneumatic valve 107 to open when a drop in the power supply voltage of the electric motor 102 is detected, and controlling the pneumatic valve 107 to close when a restoration of the power supply voltage of the electric motor 102 is detected.
As can be seen from fig. 1, compared with the compressor anti-surge control system in the related art, the compressor anti-surge control system provided in the embodiment of the present application adds an auxiliary anti-surge line to the compressor inlet line and the compressor outlet line, directly connects the compressor outlet with the inlet, and installs a pneumatic valve on the auxiliary anti-surge line, which can respond quickly. The working principle of adding an auxiliary anti-surge pipeline and a pneumatic valve to avoid surge is as follows:
when the compressor unit normally operates, the newly-added pneumatic valve is in a closed state; when the power supply voltage of the motor fluctuates instantaneously, when the control equipment of the compressor unit detects that the power supply voltage drops temporarily, an opening instruction is immediately sent to the pneumatic valve, the pneumatic valve is quickly opened after receiving the opening instruction, so that the auxiliary anti-surge pipeline is in a flowing state, namely, gas at an outlet pipeline of the compressor can flow back to an inlet pipeline of the compressor through the auxiliary anti-surge pipeline, the inlet and outlet pressures of the compressor unit are quickly balanced, and the auxiliary anti-surge pipeline is very short in length and can respond more quickly, so that the inlet flow of the compressor can be supplemented in time, and the phenomenon that the gas flows back to the compressor to cause surge due to overlarge outlet pressure of the compressor in the compressor unit is avoided; when the control equipment of the compressor unit detects that the power supply voltage is recovered to be normal, the power of the compressor unit is recovered, the compressor unit can normally run at an increased speed, a closing instruction can be sent to the pneumatic valve to control the pneumatic valve to be quickly closed, and in the whole process, the compressor unit cannot generate surging due to the fact that the flow of the inlet of the compressor unit is too low.
Optionally, after the pneumatic valve corresponding to the auxiliary anti-surge pipeline is opened, the outlet gas of the compressor unit is not cooled in the process of flowing back to the inlet of the compressor unit through the auxiliary anti-surge pipeline, and the outlet gas of the compressor is high-temperature and high-pressure gas, if the outlet gas directly flows back to the inlet of the compressor unit, the mixing ratio of the high-temperature gas in the inlet pipeline of the compressor unit may be too large, so that the inlet temperature of the compressor is increased too fast, the inlet gas is expanded rapidly, the gas flow of the compressor unit is not increased but reduced, and the compressor unit generates surge, therefore, in order to avoid the situation that the gas flow velocity in the auxiliary anti-surge pipeline is too fast, the flow coefficient corresponding to the pneumatic valve arranged on the auxiliary anti-surge pipeline cannot be too large, and through simulation, when the flow coefficient of the pneumatic valve is between 100 and 300, the inlet temperature of the compressor can be ensured to meet the unit operation requirement, correspondingly, the specific value of the pneumatic valve is related to the size of the inlet pipeline of the compressor and the length of the auxiliary anti-surge pipeline.
Optionally, the anti-surge control system of the compressor in the embodiment of the present application further includes an orifice plate 108, the orifice plate 108 is connected to the pneumatic valve 107, the orifice plate may be designed behind the pneumatic valve 107, and the orifice plate 108 is used for adjusting the gas flow rate in the auxiliary anti-surge pipeline; for example, if the field technician determines that the gas flow rate in the auxiliary anti-surge line is too fast, a restrictive orifice can be added after the pneumatic valve to reduce the gas flow rate in the auxiliary anti-surge line.
Optionally, the orifice plate may be adjusted according to field conditions, for example, the orifice plate with different diameters may be replaced under different conditions.
Optionally, in the embodiment of the present application, since the auxiliary anti-surge pipeline is used for fast response, that is, it is required to achieve fast balance of flow at the inlet and the outlet of the compressor, the length of the auxiliary anti-surge pipeline cannot be too long, and the length of the auxiliary anti-surge pipeline is determined to be less than 30m through simulation, so that the purpose of fast response can be achieved. For example, the length of the auxiliary anti-surge line may be set to 20 m.
Optionally, in the embodiment of the application, on the basis of the anti-surge pipeline of the original unit, an auxiliary anti-surge pipeline is added to achieve the purpose of rapidly balancing the flow of the inlet and the outlet of the compressor unit, and when the control device controls the pneumatic valve to be opened, the anti-surge valve corresponding to the anti-surge pipeline of the unit is also controlled to be opened to balance the flow of the inlet and the outlet of the compressor together.
To sum up, in the embodiment of this application, through newly-increased supplementary surge-proof pipeline and pneumatic valve, because newly-increased supplementary surge-proof pipeline's length is shorter, compare in original unit surge-proof pipeline, have the advantage of faster response to can be when compressor unit power supply is undulant, the flow of quick balance compressor access & exit, thereby avoid the unit surge to shut down, so that after the power supply resumes, the compressor unit can resume normal operating gradually, has guaranteed the safety and stability operation of compressor unit.
The above embodiment mainly describes the compressor set anti-surge system shown in the embodiment of the present application, and the following embodiment focuses on how the control device controls to implement the above anti-surge control method, as shown in fig. 2, which shows a flowchart of the compressor anti-surge control method shown in an exemplary embodiment of the present application, and the embodiment of the present application takes the control device, which is applied to the compressor anti-surge control system in fig. 1, as an example to describe the method, and the method includes:
The driving motor drives the compressor to rotate, and when the driving motor loses power, the rotating speed of the compressor is rapidly reduced under the action of load.
In a possible implementation manner, the control device may detect a power state of the power supply for the driving motor in real time, that is, the control device may obtain the power supply voltage corresponding to the driving motor in real time, so as to determine whether the power supply voltage of the driving motor fluctuates suddenly or in other situations, so as to make a corresponding indication in time according to the situation of the power supply voltage.
And 202, responding to the condition that the power supply voltage is lower than a preset voltage threshold value, controlling the pneumatic valve to be opened, and enabling high-pressure gas at the outlet pipeline of the compressor to flow back to the inlet pipeline of the compressor through the auxiliary anti-surge pipeline in the opening state of the pneumatic valve.
The preset voltage threshold value can be set by technicians of the station, historical power supply voltage fluctuation conditions of the station can be integrated for setting, and specific values of the preset voltage threshold value are not limited in the embodiment of the application, for example, the power supply voltage threshold value is 220V.
In one possible embodiment, when the control device determines that the supply voltage is below a preset voltage threshold, determining the fluctuation of the power supply voltage, when the fluctuation of the power supply voltage occurs, the driving motor loses power instantly, because the outlet pressure of the compressor is greater than the inlet pressure, the inertia of the compressor unit is blocked, the rotating speed is rapidly reduced, possibly leading to a surge shutdown of the compressor assembly, in which case, in order to avoid a surge shutdown of the compressor assembly during voltage fluctuations, the control device immediately sends control instructions to the pneumatic valve to control the pneumatic valve to open, so that the high-pressure gas at the outlet of the compressor line can flow back to the inlet line of the compressor through the auxiliary anti-surge line, therefore, the inlet flow and the outlet flow of the compressor are quickly balanced, the pressure of the inlet and the outlet of the compressor is balanced, and the rotating speed of the compressor is reduced under the inertia effect, so that the rotating speed of the compressor is prevented from being reduced to be lower than the stable running rotating speed during the power supply fluctuation.
Optionally, the length of the auxiliary anti-surge pipeline is shorter and far smaller than that of the unit anti-surge pipeline, so that the auxiliary anti-surge pipeline is added, when the fluctuation of the power supply voltage is detected, the auxiliary anti-surge pipeline can quickly respond, the pressure at the inlet and the outlet of the compressor is quickly balanced, and the speed of the reduction of the rotating speed of the compressor unit is reduced.
And step 203, responding to the power supply voltage higher than the preset voltage threshold value, and controlling the air-operated valve to be closed.
Because the power supply voltage has short temporary drop time, which is generally millisecond, the power supply voltage can be quickly recovered and stabilized, the driving motor can resume running under power, the compressor starts normal speed increase, and at the moment, the flow of the inlet and the outlet of the compressor does not need to be balanced through an auxiliary anti-surge pipeline, so that in a possible implementation mode, when the control device determines that the power supply voltage is recovered to be normal, namely the power supply voltage is higher than a preset voltage threshold value, a control instruction can be sent to the pneumatic valve to control the pneumatic valve to be closed.
To sum up, in the embodiment of the application, through increasing supplementary anti-surge pipeline and pneumatic valve in original compressor unit control system, when the supply voltage that controlgear detected the motor takes place undulantly, open through controlling the pneumatic valve, make the gas of compressor outlet pipeline department can flow back to compressor entry pipeline department through supplementary anti-surge pipeline, pressure and the flow of compressor exit are balanced fast, avoid the very fast decline of compressor rotational speed, in time supply the entry flow of compressor, avoid the compressor to cause the compressor surge to shut down because supply voltage drops temporarily, compressor unit safety and stability operation has been guaranteed.
In a possible implementation mode, a throttling orifice plate can be designed behind the pneumatic valve so as to adjust the gas flow rate in the auxiliary anti-surge pipeline in real time according to the field situation.
Referring to fig. 3, which shows a flowchart of a compressor anti-surge control method according to another exemplary embodiment of the present application, the embodiment of the present application is described by taking the method as an example of being applied to a control device in the compressor anti-surge control system of fig. 1, and the method includes:
and 301, acquiring a power supply voltage corresponding to a driving motor, wherein the driving motor is used for driving the compressor to rotate under the action of the power supply voltage.
The implementation manner of step 301 may refer to the above embodiments, which are not described herein.
And 302, responding to the condition that the power supply voltage is lower than a preset voltage threshold value, sending an opening instruction to a pneumatic valve, wherein the pneumatic valve is used for opening the valve when receiving the opening instruction, and high-pressure gas at the outlet pipeline of the compressor flows back to the inlet pipeline of the compressor through an auxiliary anti-surge pipeline in the opening state of the pneumatic valve.
In a possible implementation mode, when the control device detects that the power supply voltage of the driving motor fluctuates, an opening instruction is sent to the pneumatic valve, and correspondingly, the pneumatic valve rapidly opens the valve after receiving the opening instruction, so that high-pressure gas at the outlet pipeline of the compressor can flow back to the inlet pipeline of the compressor through the auxiliary anti-surge pipeline, the inlet and outlet pressure and the flow of the compressor are rapidly balanced, the rotating speed reduction rate of the compressor is reduced, and the normal and stable operation of the compressor is maintained.
The flow coefficient corresponding to the pneumatic valve determines the gas flow rate in the auxiliary anti-surge pipeline, so that the temperature of the inlet pipeline of the compressor unit during gas backflow can be indirectly determined, and the compressor unit has a certain limit on the temperature of the inlet pipeline, so that in order to avoid too high gas flow rate and excessive mixing of high-temperature gas at the inlet pipeline of the compressor, in one possible implementation mode, the flow coefficient for setting the pneumatic valve cannot be too large, that is, the flow coefficient corresponding to the pneumatic valve has the highest threshold value.
Optionally, in the embodiment of the present application, after simulation, an engineer determines that the flow coefficient of the pneumatic valve is between 100 and 300, which may ensure that the temperature requirement at the inlet of the compressor is met when gas flows to the inlet of the compressor through the auxiliary anti-surge pipeline.
In practical applications, the size (or flow coefficient) of the pneumatic valve is generally selected to be slightly larger, so as to avoid the problem that the size of the pneumatic valve is selected to be too large, which leads to too high inlet temperature of the compressor unit, in a possible embodiment, a throttle orifice plate is arranged behind the pneumatic valve to adjust the gas flow rate in the auxiliary anti-surge pipeline.
Correspondingly, in practical applications, the control device may implement monitoring of the gas flow rate in the auxiliary anti-surge line in order to determine whether an increase of the orifice plate or an adjustment of the orifice diameter of the orifice plate is required.
And step 304, adjusting the aperture of the orifice plate according to the current gas flow rate, wherein the orifice plate is used for adjusting the gas flow rate in the anti-surge pipeline.
The aperture of the orifice plate is adjustable, that is, the aperture of the orifice plate has a certain adjustment range, for example, the aperture of the orifice plate is 120mm-150mm, that is, the aperture of the orifice plate can be adjusted between 120mm and 150 mm.
In a possible implementation mode, can set up the orifice plate behind the pneumatic valve, when determining that the gas flow rate of supplementary anti-surge pipeline is suitable, when need not the orifice plate, the orifice plate can keep the maximum aperture value, if it is too fast to determine the gas flow rate in the supplementary anti-surge pipeline, can suitably reduce the aperture of orifice plate according to the too fast degree of gas flow rate, so that adjust the gas flow rate in the supplementary anti-surge pipeline in real time according to the on-the-spot condition, thereby when guaranteeing that compressor outlet gas flows back to the compressor entry through supplementary anti-surge pipeline, can satisfy the requirement of compressor entry temperature, avoid the too high compressor unit surge shutdown that leads to of inlet temperature, the normal steady operation of compressor unit has further been guaranteed.
In one illustrative example, adjusting the orifice diameter of the orifice plate based on the gas flow rate in the auxiliary anti-surge line may include the steps of:
the method comprises the steps of responding to the fact that the current gas flow rate is larger than a first preset flow rate threshold value, controlling to reduce the aperture of a throttle orifice plate, and reducing the gas flow rate in an auxiliary anti-surge pipeline through reducing the aperture of the throttle orifice plate.
The first preset flow rate threshold is set by an engineer according to a temperature requirement of the compressor inlet pipeline, that is, the first preset flow rate threshold indicates a maximum gas flow rate that does not exceed the temperature requirement of the compressor inlet when high-temperature gas flows back to the compressor inlet through the auxiliary anti-surge pipeline.
Optionally, the selection of the first preset flow rate threshold may also be related to the length of the auxiliary anti-surge pipeline, the size of the compressor inlet pipeline, and the like, and the engineer may comprehensively analyze the above factors to obtain the first preset flow rate threshold.
In a possible embodiment, if the control device monitors that the current gas flow rate in the auxiliary anti-surge pipeline is greater than the first preset flow rate threshold value, it indicates that if the compressor outlet gas flows back to the compressor inlet according to the current gas flow rate, the high-temperature gas at the compressor inlet pipeline may be mixed too much, so that the gas pressure at the compressor inlet is increased to cause the unit to surge, and therefore, the size of the orifice plate needs to be reduced to reduce the gas flow rate in the auxiliary anti-surge pipeline.
In an exemplary embodiment, if the control device monitors that the current gas flow rate in the auxiliary anti-surge pipeline is greater than the first preset flow rate threshold value, and the aperture size of the orifice plate is 160mm, the aperture size of the orifice plate needs to be reduced to reduce the gas flow rate in the auxiliary anti-surge pipeline, and the aperture size of the orifice plate can be adjusted from 160mm to 150 mm.
And secondly, responding to the fact that the current gas flow rate is smaller than a second preset flow rate threshold value, controlling to increase the aperture of the throttle orifice plate, and increasing the gas flow rate in the auxiliary anti-surge pipeline by increasing the aperture of the throttle orifice plate, wherein the second preset flow rate threshold value is smaller than the first preset flow rate threshold value.
The second preset flow rate threshold indicates that the auxiliary anti-surge pipeline can quickly balance the lowest gas flow rate of the gas pressure between the inlet and the outlet of the compressor, that is, if the gas flow rate in the auxiliary anti-surge pipeline is lower than the second preset flow rate threshold, the flow at the inlet of the compressor may not be supplemented in time, so that the compressor outlet pressure is too high to cause the unit surge.
Optionally, the second preset flow rate threshold is smaller than the first preset flow rate threshold.
In a possible implementation manner, if the control device monitors that the gas flow rate in the auxiliary anti-surge pipeline is lower than the second preset flow rate threshold, it indicates that the current gas flow rate is too low, and it may not be possible to quickly balance the gas pressure at the inlet and the outlet of the compressor, at this time, the aperture of the orifice plate may be adjusted to increase the gas flow rate in the auxiliary anti-surge pipeline.
In an exemplary example, if the control device detects that the gas flow rate in the auxiliary anti-surge pipeline is too low and is lower than the second preset flow rate threshold, at this time, the aperture size of the orifice plate is 120mm, the aperture size of the orifice plate needs to be increased to increase the gas flow rate in the auxiliary anti-surge pipeline, and correspondingly, the aperture size of the orifice plate can be adjusted from 120mm to 150 mm.
And 305, responding to the condition that the power supply voltage is higher than a preset voltage threshold value and the time length of the power supply voltage recovered to be higher than the preset voltage threshold value reaches a preset time length threshold value, sending a closing instruction to a pneumatic valve, wherein the pneumatic valve is used for closing the valve when receiving the closing instruction.
Because the unstable condition that may lead to the unit surging of supply voltage, when the opportunity of closing the pneumatic valve is confirmed, whether the voltage recovers stably should be considered, in order to avoid because the voltage only recovers to normal level for a short time, the decline condition appears again and leads to the pneumatic valve that needs to be opened and closed frequently, therefore, in a possible implementation mode, when control device confirms that the supply voltage of driving motor is higher than the preset voltage threshold value, recover to normal level promptly, and in the length of time of presetting, when supply voltage is normal level, launch the instruction of closing to the pneumatic valve, in order to control the pneumatic valve to close.
The preset duration threshold may be set by an engineer according to a historical power supply voltage fluctuation condition, for example, the preset duration threshold may be 2 seconds, and the specific value of the preset duration threshold is not limited in the embodiment of the present application.
In the embodiment, the orifice plate with the adjustable aperture is arranged behind the pneumatic valve, so that the gas flow rate of the auxiliary anti-surge pipeline can be adjusted, namely when the gas flow rate is overlarge, the gas flow rate is reduced by reducing the size of the orifice plate, and the phenomenon that the gas flow rate is overlarge to cause overlarge air pressure at the inlet of the compressor to cause unit surging is avoided; when the gas flow velocity is too small, the gas flow velocity is improved by increasing the size of the throttling hole plate, so that the problem that the gas flow velocity is too small and the gas pressure at the inlet and the outlet of the compressor cannot be balanced in time is avoided; further, by turning off the pneumatic valve after it is determined that the power supply voltage is restored to be stable for a certain period of time, it is possible to avoid the need to frequently turn on and off the pneumatic valve due to the instability of the power supply voltage.
In an illustrative example, simulation is carried out at a station of a west-east gas transmission pipeline according to the method shown in the embodiment, 4 compressor units of the station are subjected to simulation and simulation transformation at the same time, an auxiliary anti-surge pipeline is added between an inlet pipeline and an outlet pipeline of each compressor unit, and a pneumatic valve is arranged on the auxiliary anti-surge pipeline, wherein the length of the auxiliary anti-surge pipeline is 16.8m, the pneumatic valve adopts a pneumatic quick-opening valve of DN200, a throttle orifice plate is connected behind the auxiliary anti-surge valve, and the diameter of the throttle orifice plate is 150 mm.
After the system simulation transformation is finished, in the debugging and running process, the process of simulating 1000 milliseconds of power supply voltage sag is realized, and the specific simulation process is as follows:
automatic accord with the distribution of three compressor unit in the simulation station, all steady operation under the 3760rpm operating mode, simulation supply voltage is temporarily will, three motors stop power output in the twinkling of an eye, under the load effect, compressor unit rotational speed descends fast, and simultaneously, controlgear detects supply voltage and descends, pneumatic valve to three compressor unit difference correspondences sends the opening instruction, it is corresponding, the pneumatic valve is opened fast after receiving the opening instruction, under the effect of pressure differential, the high-pressure gas of compressor outlet pipeline flows back to compressor inlet pipeline through supplementary anti-surge pipeline, can play the effect of quick balanced compressor outlet pipeline pressure, make the rotational speed decline of compressor unit slow down, the original anti-surge valve of simultaneous control compressor unit is opened. When the supply voltage is temporarily dropped to return to normal, the power of the motor is recovered, and at the moment, the rotating speeds of the three compressor sets are respectively reduced to 3183rpm, 3190rpm and 3211rpm, and are not reduced to be less than 3120rpm (3120rpm is the lowest stable operation rotating speed). When the compressor units are started again, correspondingly, when the control equipment detects that the power supply voltage of the motor is recovered to a normal level and lasts for 2 seconds, a closing instruction is sent to the pneumatic valves corresponding to the three compressor units, correspondingly, the pneumatic valves are quickly closed after receiving the closing instruction, then the original anti-surge valves of the three compressor units are gradually closed along with the adjustment of the three compressor units, in the whole process, the inlet temperature of the three compressor units is raised to 82.9 ℃, 83.3 ℃ and 83.1 ℃, and the three compressor units automatically return to normal operation.
The continuous multiple times of simulation operation shows that the technical transformation of the auxiliary anti-surge pipeline is implemented on the pipeline compressor unit, so that the compressor unit can be effectively prevented from surging due to the temporary drop of the supply voltage, the rotating speed of the compressor unit can be prevented from being lower than the lowest stable operation rotating speed during the temporary drop of the supply voltage, the probability of halt of the compressor unit caused by the fluctuation of the supply voltage is reduced, meanwhile, the imbalance of the gas pressure of the inlet and the outlet of the compressor is avoided, the gas balance can be quickly stabilized, and the compressor unit can be ensured to automatically recover to normal and stable operation. Because the unit automatically returns to normal operation, the unit fault shutdown can be greatly reduced after the reconstruction is implemented, and the normal operation of the compressor unit is further ensured.
Referring to fig. 4, a block diagram of a surge protection control apparatus for a compressor set according to an exemplary embodiment of the present application is shown, where the apparatus is used to implement part or all of a control device, and the apparatus includes:
the first obtaining module 401 is configured to obtain a power supply voltage corresponding to a driving motor, where the driving motor is configured to drive a compressor to rotate under the action of the power supply voltage;
a first control module 402, configured to control a pneumatic valve to open in response to the supply voltage being lower than a preset voltage threshold, wherein in an open state of the pneumatic valve, high-pressure gas at an outlet line of the compressor flows back to an inlet line of the compressor through an auxiliary anti-surge line;
a second control module 403 for controlling the pneumatic valve to close in response to the supply voltage being above the preset voltage threshold.
Optionally, a throttle orifice plate is arranged behind the pneumatic valve, and the aperture of the throttle orifice plate is adjustable;
the device further comprises:
the second acquisition module is used for acquiring the current gas flow rate corresponding to the auxiliary anti-surge pipeline;
and the adjusting module is used for adjusting the aperture of the orifice plate according to the current gas flow rate, and the orifice plate is used for adjusting the gas flow rate in the anti-surge pipeline.
Optionally, the adjusting module includes:
the first adjusting unit is used for responding to the current gas flow rate being larger than a first preset flow rate threshold value, controlling to reduce the aperture of the throttle orifice plate, and reducing the gas flow rate in the auxiliary anti-surge pipeline by reducing the aperture of the throttle orifice plate;
and the second adjusting unit is used for responding to the current gas flow rate being smaller than a second preset flow rate threshold value, controlling to increase the aperture of the throttle orifice plate, and increasing the gas flow rate in the auxiliary anti-surge pipeline by increasing the aperture of the throttle orifice plate, wherein the second preset flow rate threshold value is smaller than the first preset flow rate threshold value.
Optionally, the second control module 403 includes:
and the control unit is used for responding to the condition that the power supply voltage is higher than the preset voltage threshold value, and the time length of the power supply voltage which is recovered to be higher than the preset voltage threshold value reaches a preset time length threshold value, and controlling the pneumatic valve to be closed.
Optionally, the first control module 402 includes:
the first sending unit is used for sending an opening instruction to the pneumatic valve, and the pneumatic valve is used for opening the valve when receiving the opening instruction;
the second control module 403 includes:
and the second sending unit is used for sending a closing instruction to the pneumatic valve, and the pneumatic valve is used for closing the valve when receiving the closing instruction.
To sum up, in the embodiment of the application, through increasing supplementary anti-surge pipeline and pneumatic valve in original compressor unit control system, when the supply voltage that controlgear detected the motor takes place undulantly, open through controlling the pneumatic valve, make the gas of compressor outlet pipeline department can flow back to compressor entry pipeline department through supplementary anti-surge pipeline, pressure and the flow of compressor exit are balanced fast, avoid the very fast decline of compressor rotational speed, in time supply the entry flow of compressor, avoid the compressor to cause the compressor surge to shut down because supply voltage drops temporarily, compressor unit safety and stability operation has been guaranteed.
It should be noted that: the compressor surge-proof control device provided in the above embodiment is only exemplified by the division of the above functional modules, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the apparatus is divided into different functional modules, so as to complete all or part of the above description.
The application also provides a computer device which comprises a processor and a memory, wherein at least one instruction is stored in the memory, and the at least one instruction is loaded and executed by the processor to realize the compressor anti-surge control method provided by the method embodiments. It should be noted that the computer device, i.e., the control device shown in the above embodiment, may be a computer device as provided in fig. 5 below.
Refer to fig. 5, which illustrates a schematic structural diagram of a computer device according to an exemplary embodiment of the present application. Specifically, the method comprises the following steps: the computer apparatus 500 includes a Central Processing Unit (CPU) 501, a system Memory 504 including a Random Access Memory (RAM) 502 and a Read-Only Memory (ROM) 503, and a system bus 505 connecting the system Memory 504 and the CPU 501. The computer device 500 also includes a basic Input/Output (I/O) System 506 that facilitates information transfer between various devices within the computer, and a mass storage device 507 for storing an operating System 513, application programs 514, and other program modules 515.
The basic input/output system 506 comprises a display 508 for displaying information and an input device 509, such as a mouse, keyboard, etc., for user input of information. Wherein a display 508 and an input device 509 are connected to the central processing unit 501 through an input output controller 510 connected to the system bus 505. The basic input/output system 506 may also include an input/output controller 510 for receiving and processing input from a number of other devices, such as a keyboard, mouse, or electronic stylus. Similarly, input-output controller 510 also provides output to a display screen, a printer, or other type of output device.
The mass storage device 507 is connected to the central processing unit 501 through a mass storage controller (not shown) connected to the system bus 505. The mass storage device 507 and its associated computer-readable media provide non-volatile storage for the computer device 500. That is, the mass storage device 507 may include a computer readable medium (not shown) such as a hard disk or CD-ROM drive.
Without loss of generality, computer readable media may comprise computer storage media and communication media. Computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Computer storage media includes RAM, ROM, Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), flash Memory or other solid state Memory technology, CD-ROM, Digital Versatile Disks (DVD), or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices. Of course, those skilled in the art will appreciate that computer storage media is not limited to the foregoing. The system memory 504 and mass storage device 507 described above may be collectively referred to as memory.
The memory stores one or more programs configured to be executed by the one or more central processing units 501, the one or more programs containing instructions for implementing the compressor anti-surge control method described above, the central processing unit 501 executing the one or more programs implementing the compressor anti-surge control method provided by the various method embodiments described above.
According to various embodiments of the present application, the computer device 500 may also operate as a remote computer connected to a network through a network, such as the Internet. That is, the computer device 500 may be connected to the network 512 through the network interface unit 511 connected to the system bus 505, or may be connected to other types of networks or remote computer systems (not shown) using the network interface unit 511.
The memory further comprises one or more programs, the one or more programs are stored in the memory, and the one or more programs comprise steps executed by the control equipment for carrying out the compressor anti-surge control method provided by the embodiment of the application.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, which may be a computer readable storage medium contained in a memory of the above embodiments; or it may be a computer-readable storage medium that exists separately and is not assembled into a computer device. The computer readable storage medium has stored therein at least one instruction, at least one program, set of codes, or set of instructions that is loaded and executed by a processor to implement the compressor anti-surge control method described above.
Optionally, the computer-readable storage medium may include: ROM, RAM, Solid State Drives (SSD), or optical disks, etc. The Random Access Memory may include a resistive Random Access Memory (ReRAM) and a Dynamic Random Access Memory (DRAM).
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
According to an aspect of the application, a computer program product or computer program is provided, comprising computer instructions, the computer instructions being stored in a computer readable storage medium. A processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions to cause the computer device to perform the compressor anti-surge control method provided in the various alternative implementations of the above aspect.
The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A compressor anti-surge control method, characterized in that the method is applied to a control device, the method comprising:
acquiring power supply voltage corresponding to a driving motor, wherein the driving motor is used for driving a compressor to rotate under the action of the power supply voltage;
in response to the power supply voltage being lower than a preset voltage threshold, controlling a pneumatic valve to be opened, wherein in the open state of the pneumatic valve, high-pressure gas at an outlet pipeline of the compressor flows back to an inlet pipeline of the compressor through an auxiliary anti-surge pipeline;
controlling the pneumatic valve to close in response to the supply voltage being above the preset voltage threshold.
2. The method of claim 1, wherein the pneumatic valve is followed by an orifice plate having an adjustable orifice diameter;
after controlling the pneumatic valve to be opened in response to the power supply voltage being lower than a preset voltage threshold, the method further comprises:
obtaining a current gas flow rate in the auxiliary anti-surge pipeline;
and adjusting the aperture of the orifice plate according to the current gas flow rate, wherein the orifice plate is used for adjusting the gas flow rate in the anti-surge pipeline.
3. The method of claim 2, wherein said adjusting the aperture of the orifice plate based on the current gas flow rate comprises:
in response to the current gas flow rate being greater than a first preset flow rate threshold value, controlling to reduce the aperture of the orifice plate, and reducing the gas flow rate in the auxiliary anti-surge pipeline by reducing the aperture of the orifice plate;
and responding to the current gas flow rate being smaller than a second preset flow rate threshold value, controlling to increase the aperture of the throttle orifice plate, and increasing the gas flow rate in the auxiliary anti-surge pipeline by increasing the aperture of the throttle orifice plate, wherein the second preset flow rate threshold value is smaller than the first preset flow rate threshold value.
4. A method according to any one of claims 1 to 3, wherein said controlling said pneumatic valve to close in response to said supply voltage being higher than said preset voltage threshold comprises:
and responding to the condition that the power supply voltage is higher than the preset voltage threshold value and the time length of the power supply voltage recovered to be higher than the preset voltage threshold value reaches a preset time length threshold value, and controlling the pneumatic valve to be closed.
5. The method according to any one of claims 1 to 3,
the control pneumatic valve is open and comprises:
sending an opening instruction to the pneumatic valve, wherein the pneumatic valve is used for opening the valve when receiving the opening instruction;
the controlling the pneumatic valve to close includes:
sending a closing command to the pneumatic valve, wherein the pneumatic valve is used for closing the valve when receiving the closing command.
6. A compressor surge-prevention control apparatus, applied to a control device, comprising:
the first acquisition module is used for acquiring power supply voltage corresponding to a driving motor, and the driving motor is used for driving the compressor to rotate under the action of the power supply voltage;
the first control module is used for responding to the condition that the power supply voltage is lower than a preset voltage threshold value, controlling a pneumatic valve to be opened, and under the opening condition of the pneumatic valve, high-pressure gas at an outlet pipeline of the compressor flows back to an inlet pipeline of the compressor through an auxiliary anti-surge pipeline;
and the second control module is used for responding to the condition that the power supply voltage is higher than the preset voltage threshold value and controlling the pneumatic valve to be closed.
7. A control device, characterized in that it comprises a processor and a memory, said memory having stored therein at least one instruction, which is executed by said processor to implement a compressor anti-surge control method according to any one of the preceding claims 1 to 5.
8. A compressor anti-surge control system, characterized in that the compressor anti-surge control system comprises a compressor, an electric motor, a compressor inlet pipeline, a compressor outlet pipeline, a unit anti-surge pipeline, an auxiliary anti-surge pipeline, a pneumatic valve and a control device;
the motor is electrically connected with the compressor and used for driving the compressor to rotate;
the compressor is used for compressing low-pressure gas flowing into the inlet pipeline of the compressor to obtain high-pressure gas, and discharging the high-pressure gas through the outlet pipeline of the compressor;
the unit anti-surge line is used for connecting the compressor inlet line and the compressor outlet line, and the unit anti-surge line is used for providing a flow channel for the high-pressure gas to flow back from the compressor outlet line to the compressor inlet line under a flow state;
the auxiliary anti-surge line connecting the compressor inlet line and the compressor outlet line, the auxiliary anti-surge line for providing a flow passage for the high-pressure gas to flow back from the compressor outlet line to the compressor inlet line under a flow-through condition, wherein a length of the auxiliary anti-surge line is less than a length of the plant anti-surge line;
the pneumatic valve is arranged on the auxiliary anti-surge pipeline and used for controlling the on-off state of the auxiliary anti-surge pipeline;
the control device is electrically connected with the pneumatic valve, and is used for controlling the pneumatic valve to be opened when the reduction of the power supply voltage of the motor is detected and controlling the pneumatic valve to be closed when the restoration of the power supply voltage of the motor is detected.
9. The compressor antisurge control system of claim 8 further comprising an orifice plate;
the orifice plate is connected with the pneumatic valve and used for adjusting the gas flow rate in the auxiliary anti-surge pipeline.
10. The compressor antisurge control system of claim 8 wherein said pneumatic valve presents a preset flow coefficient, said preset flow coefficient being between 100 and 300, and said auxiliary antisurge line has a length of 30m or less.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116771712A (en) * | 2023-08-23 | 2023-09-19 | 中粮生化(成都)有限公司 | Anti-asthma driving system and method for centrifugal compressor |
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| CN1218551A (en) * | 1996-04-11 | 1999-06-02 | 约克国际有限公司 | Methods and apparatus for detecting surge in centrifugal compressors |
| EP2042743A1 (en) * | 2007-09-27 | 2009-04-01 | ABB Research Ltd. | A gas compression system, a method for controlling a gas compression system, and a device for controlling a recycle valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1218551A (en) * | 1996-04-11 | 1999-06-02 | 约克国际有限公司 | Methods and apparatus for detecting surge in centrifugal compressors |
| EP2042743A1 (en) * | 2007-09-27 | 2009-04-01 | ABB Research Ltd. | A gas compression system, a method for controlling a gas compression system, and a device for controlling a recycle valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116771712A (en) * | 2023-08-23 | 2023-09-19 | 中粮生化(成都)有限公司 | Anti-asthma driving system and method for centrifugal compressor |
| CN116771712B (en) * | 2023-08-23 | 2023-10-24 | 中粮生化(成都)有限公司 | Anti-asthma driving system and method for centrifugal compressor |
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