Compressor unit of compressor station, control method of compressor unit, medium and program product

Abstract

The invention discloses a compressor unit of a compressor station, a control method of the compressor unit, a medium and a program product, relates to the technical field of compressors, and aims to solve the problem of resource waste during test dragging of the compressor unit of the compressor station. The compressor unit of the compressor station comprises a compressor; an inlet valve; an outlet valve; one end of the inlet bypass pipeline is connected to one side of the inlet valve, and the other end of the inlet bypass pipeline is connected to the other side of the inlet valve; an inlet bypass valve is arranged on the inlet bypass pipeline; after the purging operation included in the warm-up mode is executed, the inlet bypass valve is controlled to be opened, the inlet valve is controlled to be closed, and the outlet valve is controlled to be closed, so that the compression pipeline is inflated through the inlet bypass valve; the compression pipeline is a pipeline between the inlet valve and the outlet valve; under the condition that the pressure of the compression pipeline reaches a first set pressure value, the warm-up operation included in the warm-up mode is executed; the first set pressure value is lower than a second set pressure value corresponding to the compression pipeline in the starting mode.

Description

Technical Field

[0001] The present application relates to the technical field of compressors, and in particular to a compressor unit of a gas compressor station and a control method, medium and program product thereof. Background Art

[0002] In the energy transmission system, the compressor station is a key link to ensure the stable and efficient transmission of gas, and the stable operation of its core equipment, the compressor unit, is crucial. In order to ensure that the compressor unit is in good working condition, the industry generally adopts the maintenance method of test and drag operation. By regularly operating the equipment, potential faults can be discovered in time to ensure the reliability and safety of the equipment.

[0003] However, currently, when testing the compressor unit of a compressor station, the same timing as the normal startup is usually used for testing. Although this method can fully detect the operating status of the equipment, it often leads to unnecessary high-pressure natural gas venting and long warm-up process during actual operation, resulting in greater energy consumption.

[0004] Therefore, how to reduce the waste of resources during the test towing of the compressor unit of the compressor station has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] The purpose of the present application is to provide a compressor unit of a gas compressor station and a control method, medium and program product thereof, aiming to solve the problem of reducing resource waste during test towing of the compressor unit of the gas compressor station.

[0006] In order to achieve the above objectives, this application adopts the following technical solutions:

[0007] In a first aspect, the present application provides a compressor unit of a gas compressor station, comprising: a compressor, wherein the inlet of the compressor is connected to an inlet pipeline for conveying natural gas to be compressed, and the outlet of the compressor is connected to an outlet pipeline for conveying compressed natural gas; an inlet valve, arranged on the inlet pipeline, for controlling the conduction or disconnection of the inlet pipeline; an outlet valve, arranged on the outlet pipeline, for controlling the conduction or disconnection of the outlet pipeline; an inlet bypass pipeline, one end of which is connected to one side of the inlet valve, and the other end is connected to the other side of the inlet valve; an inlet bypass valve is also arranged on the inlet bypass pipeline; after executing the purge operation included in the warm-up mode, the inlet bypass valve is opened, the inlet valve is closed, and the outlet valve is closed, so that air is inflated into the compression pipeline through the inlet bypass valve; the compression pipeline is a pipeline between the inlet valve and the outlet valve; when the pressure of the compression pipeline reaches a first set pressure value, the warm-up operation included in the warm-up mode is executed; wherein the first set pressure value is lower than the second set pressure value corresponding to the compression pipeline in the start-up mode.

[0008] The compressor unit of the compressor station provided in the embodiment of the present application needs to open the inlet valve and the outlet valve to inflate the compression pipeline in the startup mode after performing the purge operation. However, since the compressor is not running during the purge operation, the compression pipeline is not pressurized, resulting in a pressure difference between the two sides of the inlet valve and the two sides of the outlet valve. Therefore, before opening the inlet valve and the outlet valve, it is necessary to balance the pressure difference between the two sides of the inlet valve and the two sides of the outlet valve, and then open the inlet valve and the outlet valve to gradually inflate the compression pipeline until the pressure of the compression pipeline reaches the second set pressure value.

[0009] In the warm-up mode, after the purge operation is performed, it is not necessary to balance the pressure difference on both sides of the inlet valve and the outlet valve, nor is it necessary to open the inlet valve and the outlet valve to inflate the compression line. It is only necessary to control the bypass valve to open and inflate the compression line through the inlet bypass valve until the pressure of the compression line reaches the first set pressure value lower than the second set pressure value.

[0010] Thus, compared with the startup mode, the warm-up mode reduces the venting loss of natural gas through the inlet valve and the outlet valve by only inflating the compression pipeline through the inlet bypass valve, thereby reducing the waste of resources during the test run of the compressor unit of the compressor station. In addition, since the compression pipeline only needs to be inflated to a first set pressure value lower than the second set pressure value in the warm-up mode, the compressor can be tested at a lower pressure, thereby further reducing resource consumption.

[0011] In some embodiments, the compressor unit of the compressor station also includes: an anti-surge pipeline, one end of which is connected to the inlet of the compressor, and the other end is connected to the outlet of the compressor; an anti-surge valve is arranged on the anti-surge pipeline, and is used to control the conduction or disconnection of the anti-surge pipeline; the controller is configured to: in response to receiving a warm-up mode execution instruction, control the anti-surge valve to open, and start executing the warm-up mode.

[0012] In some embodiments, the controller is further configured to: obtain valve information of the anti-surge valve; the valve information includes one or more of the following: opening information, status information of the fully open contact; based on the valve information, determine whether the anti-surge valve is in a fully open state; when the anti-surge valve is in a non-fully open state, output prompt information, the prompt information is used to prompt the user that the anti-surge valve needs to be opened.

[0013] In some embodiments, the compressor unit of the compressor station also includes: an ejector device, one end of which is connected to the outlet pipeline, and the other end of which is connected to the compression pipeline; performing the warm-up operation included in the warm-up mode, including: ejecting the compressed natural gas that has passed through the outlet valve in the outlet pipeline into the compression pipeline through the ejector device to continue to inflate the compression pipeline; when the pressure of the compression pipeline meets the dry gas sealing requirement of the compressor, the compressor starts to operate to perform the warm-up operation included in the warm-up mode.

[0014] In some embodiments, the warm-up operation is used to instruct the compressor to operate at a second speed lower than the first speed until a set time is reached; wherein the first speed is the lower limit of the speed range corresponding to the compressor to meet the mains pressure; the mains pressure is the pressure required to transmit natural gas in the mains pipeline.

[0015] In some embodiments, the compressor unit of the compressor station also includes: an air cooler; an oil cooler; before executing the purge operation included in the warm-up mode, the operating status of the air cooler and / or the oil cooler is determined by running the air cooler for a first preset time, and / or running the oil cooler at a preset frequency for a second preset time, and the operating status is used to determine whether there is an abnormality in the air cooler and / or the oil cooler.

[0016] In a second aspect, the present application provides a control method for a compressor unit of a compressor station, comprising: after executing the purge operation included in the warm-up mode, controlling the inlet bypass valve to open, the inlet valve to close, and the outlet valve to close, so that air is inflated into the compression pipeline through the inlet bypass valve; the compression pipeline is the pipeline between the inlet valve and the outlet valve; when the pressure of the compression pipeline reaches a first set pressure value, executing the warm-up operation included in the warm-up mode; the first set pressure value is lower than the second set pressure value corresponding to the compression pipeline in the start-up mode.

[0017] In a third aspect, the present application provides a control device for a compressor unit of a gas compressor station, comprising: a processor and a memory; wherein the memory is used to store one or more programs, and the one or more programs include computer execution instructions. When the device is running, the processor executes the computer execution instructions stored in the memory to enable the control device to perform the control method of the second aspect mentioned above.

[0018] In a fourth aspect, the present application provides a computer-readable storage medium. When the computer execution instructions stored in the computer-readable storage medium are executed by a processor of an electronic device, the electronic device can execute the control method as described in the second aspect above.

[0019] In a fifth aspect, the present application provides a computer program product, which includes: a computer program or instructions, when the computer program or instructions are run on a computer, the computer executes the control method of the second aspect as described above.

[0020] It should be noted that the descriptions of the second to fifth aspects of the present application can refer to the detailed description of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a structural schematic diagram of a compressor unit of a gas compressor station provided by the present application according to an exemplary embodiment;

[0023] Figure 2 This is a schematic structural diagram of another compressor unit of a gas compressor station provided by the present application according to an exemplary embodiment;

[0024] Figure 3 A hardware configuration block diagram of a compressor unit of a gas compressor station provided by the present application according to an exemplary embodiment;

[0025] Figure 4 The present application provides a flowchart of a method for controlling a compressor unit of a gas compressor station according to an exemplary embodiment. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "inside", "outside", etc. indicate directions or positional relationships based on the directions or relative positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on this application. Unless otherwise specified, the above-mentioned directional description can be flexibly set in the process of actual application under the condition that the relative positional relationship shown in the accompanying drawings is met.

[0028] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0029] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. It can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] In the present application, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, article or device including the element.

[0031] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0032] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0033] In order to reduce the waste of resources during the test towing of the compressor unit of the air compressor station, an embodiment of the present application provides a compressor unit of the air compressor station. In the startup mode, after the purge operation is performed, the inlet valve and the outlet valve need to be opened to inflate the compression pipeline. However, since the compressor is not running during the purge operation, the compression pipeline is not pressurized, resulting in a pressure difference on both sides of the inlet valve and the outlet valve. Therefore, before opening the inlet valve and the outlet valve, it is necessary to balance the pressure difference on both sides of the inlet valve and the outlet valve, and then open the inlet valve and the outlet valve to gradually inflate the compression pipeline until the pressure of the compression pipeline reaches the second set pressure value.

[0034] In the warm-up mode, after the purge operation is performed, it is not necessary to balance the pressure difference on both sides of the inlet valve and the outlet valve, nor is it necessary to open the inlet valve and the outlet valve to inflate the compression line. It is only necessary to control the inlet bypass valve to open and inflate the compression line through the inlet bypass valve until the pressure of the compression line reaches the first set pressure value lower than the second set pressure value.

[0035] Thus, compared with the startup mode, the warm-up mode reduces the venting loss of natural gas through the inlet valve and the outlet valve by only inflating the compression pipeline through the inlet bypass valve, thereby reducing the waste of resources during the test run of the compressor unit of the compressor station. In addition, since the compression pipeline only needs to be inflated to a first set pressure value lower than the second set pressure value in the warm-up mode, the compressor can be tested at a lower pressure, thereby further reducing resource consumption.

[0036] Figure 1 This is a schematic diagram of the structure of a compressor unit of a compressor station provided by the present application according to an exemplary embodiment. Figure 1 As shown, the compressor unit of the compressor station includes a compressor 101, an inlet pipeline 102, an outlet pipeline 103, an inlet valve 104, an outlet valve 105, an inlet bypass pipeline 106, an inlet bypass valve 107, an outlet bypass pipeline 108 and an outlet bypass valve 109.

[0037] The inlet of the compressor 101 is connected to the inlet pipeline 102, and the outlet of the compressor 101 is connected to the outlet pipeline 103. One end of the inlet bypass pipeline 106 is connected to one side of the inlet valve 104, and the other end is connected to the other side of the inlet valve 104.

[0038] Compressor 101 is a key component of the compressor unit of the gas compressor station, which is used to compress natural gas, increase the natural gas pressure, provide sufficient power for the natural gas, enable the natural gas to overcome the resistance in pipeline transportation, and realize long-distance transportation of natural gas.

[0039] The inlet pipeline 102 is used to deliver the natural gas to be compressed to the compressor 101. The natural gas to be compressed may come from a gas source or from the natural gas to be compressed in an upper-level system, which is not limited in the present application.

[0040] The outlet pipeline 103 is used to transport compressed natural gas. For example, the compressed natural gas can be transported to a next-level system, or to a natural gas use terminal, which is not limited in the present application.

[0041] The inlet valve 104 is disposed on the inlet pipeline 102 and is used to control the opening and closing of the inlet pipeline 102 .

[0042] The outlet valve 105 is disposed on the outlet pipeline 103 and is used to control the opening and closing of the outlet pipeline 103 .

[0043] The inlet bypass line 106 is an auxiliary channel, one end of which is connected to one side of the inlet valve 104, and the other end is connected to the other side of the inlet valve 104. It should be understood that the diameter of the inlet bypass line 106 is usually smaller than that of the inlet line 102 and the outlet line 103.

[0044] The inlet bypass valve 107 is arranged on the inlet bypass pipeline 106. Since the diameter of the inlet bypass pipeline 106 is usually smaller than that of the inlet pipeline 102 and the outlet pipeline 103, the size of the inlet bypass valve 107 is also smaller than that of the inlet valve 104 and the outlet valve 105. In addition, by adjusting the opening of the inlet bypass valve 107, the flow of natural gas flowing from the inlet bypass pipeline 106 to the compression pipeline can be controlled, so that the pressure of the compression pipeline can be adjusted. The compression pipeline is the pipeline between the inlet valve 104 and the outlet valve 105.

[0045] The outlet bypass line 108 is an auxiliary channel, one end of which is connected to one side of the outlet valve 105, and the other end is connected to the other side of the outlet valve 105. It should be understood that the diameter of the inlet bypass line 106 is usually smaller than that of the inlet line 102 and the outlet line 103.

[0046] The outlet bypass valve 109 is disposed on the outlet bypass pipeline 108. By adjusting the opening of the outlet bypass valve 109, the flow of the natural gas flowing out of the outlet bypass pipeline 108 can be controlled, thereby adjusting the pressure of the compression pipeline.

[0047] Figure 2 This is a schematic diagram of the structure of another compressor unit of a gas compressor station provided by the present application according to an exemplary embodiment. Figure 2 As shown, the compressor unit of the compressor station further includes an anti-surge pipeline 201 and an anti-surge valve 202 .

[0048] The anti-surge pipeline 201 is designed to prevent the compressor 101 from surging during operation, one end of which is connected to the inlet of the compressor 101 , and the other end of which is connected to the outlet of the compressor 101 .

[0049] The anti-surge valve 202 is arranged on the anti-surge pipeline 201. By adjusting the opening of the anti-surge valve 202, part of the high-pressure gas at the outlet of the compressor 101 can be returned to the inlet of the compressor 101 through the anti-surge pipeline 201, thereby maintaining the minimum flow requirement of the compressor 101 and avoiding the instability of the gas flow inside the compressor (surge phenomenon) due to too low flow.

[0050] Figure 3 This is a hardware configuration block diagram of a compressor unit of a compressor station provided by the present application according to an exemplary embodiment. Figure 3 As shown, the compressor unit of the compressor station may include an air cooler 301 , an oil cooler 302 and a controller 303 .

[0051] The air cooler 301 is used to cool the high-temperature gas at the outlet of the compressor 101 to prevent the compressor 101 from being overheated and causing a reduction in efficiency or equipment damage.

[0052] The oil cooler 302 is used to adjust the oil temperature of the lubrication system of the compressor 101, and maintains the oil temperature of the lubrication system within a suitable range through heat exchange (water cooling or air cooling), so that the lubrication system of the compressor 101 can operate stably, and further the compressor 101 can operate stably.

[0053] The controller 303 refers to a device that can generate an operation control signal according to the instruction operation code and the timing signal to instruct the compressor unit of the compressor station to execute the control instruction. Exemplarily, the controller 303 can be a central processing unit (CPU), a general-purpose processor network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD) or any combination thereof. The controller 303 can also be other devices with processing functions, such as circuits, devices or software modules, and the embodiments of the present application do not impose any restrictions on this.

[0054] In some embodiments, the compressor unit of the gas compressor station may also include a booster pump, an ejector device and a host computer.

[0055] The booster pump is used to provide high-pressure sealing gas to meet the dry gas sealing requirement of the compressor 101 .

[0056] One end of the ejector is connected to the outlet pipeline 103 , and the other end is connected to the compression pipeline, and is used to eject the compressed natural gas in the outlet pipeline 103 through the outlet valve 105 into the compression pipeline to inflate the compression pipeline and meet the dry gas sealing requirements of the compressor 101 .

[0057] The host computer refers to a computer that can directly issue control commands, wherein the control commands include but are not limited to mode start commands, and the mode start commands are used to instruct the compressor unit of the compressor station to operate in the operation mode indicated by the mode start commands.

[0058] In some embodiments, the operation mode of the compressor unit of the gas compressor station includes a warm-up mode and a start-up mode. The warm-up mode is a mode of the compressor unit of the gas compressor station specifically used for drag-running test. In the warm-up mode, the compressor operates at a lower speed and load. The start-up mode is a standard working mode in which the compressor unit of the gas compressor station is normally started and operated to transmit natural gas. In the start-up mode, the compressor operates at a rated speed and load.

[0059] Exemplarily, the host computer controls the compressor unit of the compressor station to operate in warm-up mode, including: directly starting the warm-up mode, starting the warm-up mode on a scheduled basis, etc. Among them, directly starting the warm-up mode means that the operation and maintenance personnel manually set the compressor unit of the compressor station to operate in warm-up mode through the host computer, and then the host computer issues an operation instruction to the compressor unit of the compressor station to operate in warm-up mode. Timing the start of the warm-up mode means that the operation and maintenance personnel pre-set the start time of the warm-up mode through the host computer, and when the start time is reached, the host computer automatically issues an operation instruction to the compressor unit of the compressor station to operate in warm-up mode.

[0060] Similarly, the upper computer controls the compressor unit of the compressor station to operate in the startup mode, including: direct startup mode. Direct startup mode means that the operation and maintenance personnel manually set the compressor unit of the compressor station to operate in the startup mode through the upper computer, and then the upper computer issues an operation instruction to the compressor unit of the compressor station to operate in the startup mode.

[0061] In some embodiments, in order to provide a more convenient operation experience, a switch button can be set on the host computer, so that the maintenance personnel can quickly switch the operation mode of the compressor unit of the compressor station by clicking or triggering the switch button, so that the compressor unit of the compressor station can operate in the warm-up mode or the start-up mode. In addition, the warm-up mode and the start-up mode are interlocked, and they run independently and do not interfere with each other, thereby effectively avoiding program conflicts.

[0062] Optionally, after the compressor unit of the compressor station finishes running in the warm-up mode, the compressor unit of the compressor station will automatically switch to the start-up mode to prepare to receive and execute the start-up command sent by the control center.

[0063] It should be pointed out that Figure 3 The structure shown in the figure does not constitute a limitation on the compressor unit of the compressor station, except Figure 3 In addition to the components shown, the compressor station compressor train may include more or fewer components than shown, or combine certain components, or arrange the components differently.

[0064] In some embodiments, the main purpose of the warm-up mode is to reduce the temperature difference between the components inside the compressor to avoid damage to the components due to excessive temperature difference, and to ensure that the compressor is in a suitable working state before starting to avoid failures caused by impact during the starting process. In addition, the warm-up mode can also increase the service life of the compressor and reduce maintenance costs.

[0065] As a feasible implementation method, the warm-up mode includes air cooler trial operation, oil cooler trial operation, purge operation, warm-up operation, etc. When the compressor unit of the compressor station executes the warm-up mode, it is usually necessary to perform the above operations in sequence.

[0066] In some embodiments, the air cooler test operation is used to determine the operating state of the air cooler by operating the air cooler, so that it can be determined whether the air cooler is abnormal according to the operating state of the air cooler.

[0067] It should be understood that the commissioning of the air cooler is a very important step in the warm-up mode. The main function of the air cooler is to cool the heat generated by the compressor and ensure that the compressor operates at an appropriate temperature.

[0068] Optionally, the test operation of the air cooler generally includes: sending a start command to the air cooler to supply power to the air cooler, and controlling the air cooler to operate at a lower speed for a set period of time, and then sending a stop command to the air cooler. In this way, the test operation of the air cooler can detect the operating status of the air cooler, including temperature, wind speed, and whether there is abnormal sound or vibration.

[0069] In some embodiments, the oil cooler test operation is used to determine the operating status of the air cooler and / or the oil cooler by operating the oil cooler, so that it can be determined whether the oil cooler is abnormal according to the operating status of the oil cooler.

[0070] The main function of the oil cooler is to cool the lubricating oil in the compressor to prevent it from deteriorating or failing due to overheating. The oil cooler test run operation includes: before starting, check whether the various components of the oil cooler are intact and whether the cooling medium is sufficient. Then, send a start command to the oil cooler to power the oil cooler, and control the oil cooler to run at a set frequency for a set time, and then send a stop command to the oil cooler. In this way, the oil cooler's operating status can be detected through the oil cooler's test run operation, including temperature, wind speed, and whether there are abnormal sounds or vibrations.

[0071] In some embodiments, the purge operation is used to remove impurities or harmful gases in the pipeline of the compressor unit of the compressor station to ensure that the inside of the pipeline is clean and free of impurities or harmful gases, thereby ensuring the normal operation and long-term stability of the compressor unit.

[0072] The purge operation is to use high-pressure natural gas to remove impurities or residues in pipelines and equipment to ensure the normal operation of the equipment. The purge operation includes: controlling the inlet bypass valve to open so that high-pressure natural gas can enter through the inlet bypass valve to purge the inlet valve, inlet pipeline, unit casing and anti-surge pipeline; controlling the outlet bypass valve to open so that high-pressure natural gas can enter through the outlet bypass valve to purge the outlet valve and check valve pipeline.

[0073] In some embodiments, the warm-up operation is the core part of the warm-up mode, and its main purpose is to gradually heat up the compressor to a suitable working state before starting, so as to avoid excessive stress caused by sudden loading or high-speed operation.

[0074] As a feasible implementation, the warm-up operation included in the warm-up mode is used to instruct the compressor to operate at a second speed lower than the first speed until a set time is reached, so as to perform a drag test on the compressor unit of the compressor station.

[0075] The first speed is the lower limit of the speed range corresponding to the compressor to meet the trunk pressure; the trunk pressure is the pressure required to transmit natural gas in the trunk pipeline. It should be noted that the second speed can be a fixed value lower than the first speed, or a range lower than the first speed, which is not limited in this application.

[0076] Exemplarily, since the startup mode is a standard operating mode in which the compressor unit of the compressor station is started and operated normally to transmit natural gas, the first speed may be the compressor speed used in the startup operation included in the startup mode.

[0077] In some embodiments, since the compressor is not running during the purge operation of the warm-up mode, the compression pipeline is not pressurized, resulting in a pressure difference between the two sides of the inlet valve and the two sides of the outlet valve. Therefore, after the purge operation and before the warm-up operation, the inlet valve and the outlet valve need to be opened to inflate the compression pipeline. This ensures that the compression pipeline is filled with gas before the warm-up operation, thereby avoiding abnormal operation or damage of the compressor due to insufficient gas or unfilled pipeline during the warm-up process.

[0078] Based on this, the compressor unit of the compressor station provided in the embodiment of the present application, after executing the purge operation included in the warm-up mode, controls the inlet bypass valve to open, the inlet valve to close, and the outlet valve to close, so as to charge the compression pipeline through the inlet bypass valve. Then, when the pressure of the compression pipeline reaches the first set pressure value, the warm-up operation included in the warm-up mode is executed.

[0079] The first set pressure value is lower than the second set pressure value corresponding to the compression pipeline in the startup mode. Optionally, in order to prevent the compressor from surging, the first set pressure value is also higher than the critical pressure when the compressor surges.

[0080] It can be seen that the solution provided by the embodiment of the present application does not need to balance the pressure difference on both sides of the inlet valve and the outlet valve, nor does it need to open the inlet valve and the outlet valve to inflate the compression line. It is only necessary to control the inlet bypass valve to open and inflate the compression line through the inlet bypass valve until the pressure of the compression line reaches the first set pressure value lower than the second set pressure value.

[0081] In this way, the warm-up mode only inflates the compression pipeline through the inlet bypass valve to reduce the venting loss of natural gas through the inlet valve and the outlet valve, thereby reducing the waste of resources during the test run of the compressor unit of the compressor station. In addition, since the compression pipeline only needs to be inflated to a first set pressure value lower than the second set pressure value in the warm-up mode, the compressor can be tested at a lower pressure, thereby further reducing resource consumption.

[0082] As a possible implementation, when the pressure of the compression pipeline reaches the first set value, a closing command can be sent to the power circuit breaker of the compressor unit of the compressor station to supply power to the compressor unit of the compressor station. Then, when it is determined that the compressor unit of the compressor station meets the operating conditions, the frequency converter starts the inverter function to convert the direct current into adjustable frequency alternating current, thereby driving the compressor to operate at the second speed until the set time is reached.

[0083] In some embodiments, in order to prevent the compressor from surging during operation, when the compressor unit of the compressor station executes the warm-up mode, it is necessary to control the anti-surge valve to open so that the compressor unit of the compressor station executes the warm-up mode with the anti-surge valve opened.

[0084] As a possible implementation manner, in response to receiving a warm-up mode execution instruction, the compressor unit of the compressor station controls the anti-surge valve to open and starts to execute the warm-up mode.

[0085] In some embodiments, during the process of the compressor unit of the compressor station executing the warm-up mode, after controlling the anti-surge valve to open, in order to ensure the reliability of the anti-surge function, it is necessary to further detect the opening state of the anti-surge valve to further determine that the anti-surge valve is in a fully open state.

[0086] As a possible implementation method, the controller can obtain valve information of the anti-surge valve, and then determine whether the anti-surge valve is in a fully open state based on the valve information. In addition, when the anti-surge valve is not in a fully open state, a prompt message is output, and the prompt message is used to prompt the user that the anti-surge valve needs to be opened.

[0087] The valve information includes one or more of the following: opening information, status information of the fully open contact. The fully open contact is an electrical switch set on the anti-surge valve. When the status information of the fully open contact indicates that the fully open contact is closed, the anti-surge valve reaches the fully open position. When the status information of the fully open contact indicates that the fully open contact is disconnected, the anti-surge valve does not reach the fully open position.

[0088] For example, the controller may determine the opening information (eg, 0%-100%) of the anti-surge valve through a valve position feedback signal from a valve sensor (valve positioner or displacement sensor).

[0089] For example, when the opening information indicates that the opening of the anti-surge valve is 100%, it is determined whether the anti-surge valve is in a fully open state, otherwise, it is determined that the anti-surge valve is not in a fully open state. Alternatively, when the state information of the fully open contact indicates that the anti-surge valve has reached a fully open position, it is determined that the anti-surge valve is in a fully open state, otherwise, it is determined that the anti-surge valve is not in a fully open state.

[0090] Alternatively, when the opening information indicates that the opening of the anti-surge valve is 100%, and the state information of the fully open contact indicates that the anti-surge valve has reached the fully open position, it can be determined that the anti-surge valve is in the fully open state. Otherwise, it can be determined that the anti-surge valve is not in the fully open state.

[0091] It is understandable that if only the opening information is relied upon, when the valve sensor fails (such as signal drift, disconnection), it may be misjudged that the valve is fully open. If only the status information of the fully open contact is relied upon, when the fully open contact is mechanically stuck or in poor contact, it may not be possible to correctly feedback the opening status of the anti-surge valve, thereby misjudging that the valve is fully open. Therefore, dual detection of the opening status of the anti-surge valve based on the opening information and the status information of the fully open contact can reduce the risk of misjudgment of the opening status of the anti-surge valve when relying on only a single piece of information.

[0092] In some embodiments, during the operation of the compressor unit of the compressor station, the air cooler and the oil cooler are key auxiliary equipment and are essential to the normal operation of the compressor unit of the compressor station. If these key auxiliary equipment fail, such as fan damage, fin blockage, or blockage of the internal pipe of the oil cooler, it will directly affect the overall operating efficiency of the compressor unit of the compressor station, and may even cause damage or shutdown of the compressor unit of the compressor station, causing serious safety hazards. Therefore, in the warm-up mode, it is also necessary to set up air cooler trial operation and oil cooler trial operation to detect the operating status of the air cooler and oil cooler, discover potential problems in a timely manner, and improve the reliability and safety of the operation of the compressor unit of the compressor station.

[0093] As a possible implementation, before executing the purge operation included in the warm-up mode, the operating status of the air cooler and / or the oil cooler is determined by running the air cooler for a first preset time and / or running the oil cooler at a preset frequency for a second preset time.

[0094] The operating status is used to determine whether there is an abnormality in the air cooler and / or the oil cooler.

[0095] It can be understood that in the warm-up mode of the compressor unit of the compressor station, before the purge operation is performed, the air cooler is operated for a first preset time, and / or the oil cooler is operated for a second preset time at a preset frequency to detect the operating status of the air cooler and / or the oil cooler. And in this way, potential abnormal conditions of key auxiliary equipment in the compressor unit of the compressor station can be discovered in time. For example, if there are problems such as fan failure or fin damage in the air cooler, after running for the first preset time, there may be poor cooling effect or abnormal noise, which can be discovered in time. Similarly, if there are problems such as internal pipe blockage and oil pump abnormality in the oil cooler, after running for the second preset time at a preset frequency, parameters such as changes in oil temperature and pressure fluctuations will reflect abnormal conditions. In addition, this method further improves the warm-up mode, so that the test drag process of the compressor unit of the compressor station is not limited to the test of the compressor unit main body of the compressor unit, but also includes a comprehensive test of each key auxiliary equipment in the compressor unit of the compressor station, thereby improving the integrity of the compressor unit test.

[0096] Exemplarily, a start signal may be sent to the air cooler to start a trial operation procedure of the air cooler, so that the air cooler operates for a first preset time period, for example, the first preset time period may be 300 seconds.

[0097] And / or, the operation mode of the oil cooler is switched from the automatic control mode to the manual control mode, so that the operation and maintenance personnel can set the operation frequency of the oil cooler to the preset frequency and the operation duration to the second operation duration in the manual control mode. For example, the preset frequency can be 50 Hz and the second preset duration can be 300 seconds.

[0098] In some embodiments, since the compression line only needs to be inflated to a first set pressure value lower than the second set pressure value in the warm-up mode, the compressor can be tested at a lower pressure. Therefore, the pressure of the compressed natural gas in the outlet line passing through the outlet valve is always higher than the pressure of the compression line. For example, the difference between the pressure of the compressed natural gas in the outlet line passing through the outlet valve and the pressure of the compression line is always greater than 0.25 MPa. Therefore, the compressed natural gas in the outlet line passing through the outlet valve can be injected into the compression line until the pressure of the compression line meets the dry gas sealing requirements of the compressor.

[0099] As a possible implementation method, the compressed natural gas in the outlet pipeline passing through the outlet valve is injected into the compression pipeline through an injection device to continue to inflate the compression pipeline. Then, when the pressure of the compression pipeline meets the dry gas sealing requirements of the compressor, the compressor starts to operate to perform the warm-up operation included in the warm-up mode. In this way, the booster pump does not need to be operated, thereby extending the life of the booster pump and reducing the operation and maintenance costs.

[0100] The following is a comparative analysis of the startup mode and warm-up mode based on experimental data.

[0101] For example, taking a compressor unit of a compressor station with a voltage level of 110kV and a total installed capacity of 64MW as an example, in the startup mode, the compression pipeline of the compressor unit of the compressor station needs to be pressurized to the mains pressure, and the compressor runs at 3280rpm until it reaches more than 30 minutes. At this time, the power of the compressor unit of the compressor station is about 4500kW, and the maximum load is about 5000kW.

[0102] In warm-up mode, the compression pipeline of the compressor unit of the compressor station only needs to be pressurized to 2MPa, which is lower than the mains pressure. And the compressor runs at 800rpm until it reaches 20 minutes. At this time, the power of the compressor unit of the compressor station is about 30kW, and the maximum load is about 530kW. In addition, the electricity cost required for the compressor unit of the compressor station in warm-up mode is lower than the electricity cost required for the compressor unit of the compressor station in startup mode.

[0103] Thus, it can be known from these experimental data that the compressor unit of the compressor station provided in the present application can reduce the waste of resources during the test towing of the compressor unit of the compressor station.

[0104] The control method of the compressor unit of the gas compressor station provided in the embodiment of the present application is described in detail below with reference to the accompanying drawings.

[0105] like Figure 4 As shown, the present application provides a control method for a compressor unit of a gas compressor station, comprising:

[0106] S401 . After executing the purging operation included in the warm-up mode, the inlet bypass valve is controlled to be opened, the inlet valve is controlled to be closed, and the outlet valve is controlled to be closed so as to charge the compression line through the inlet bypass valve.

[0107] The compression pipeline is the pipeline between the inlet valve and the outlet valve.

[0108] S402: When the pressure of the compression line reaches a first set pressure value, execute a warm-up operation included in the warm-up mode.

[0109] Among them, the first set pressure value is lower than the second set pressure value corresponding to the compression pipeline in the startup mode.

[0110] based on Figure 4In the embodiment shown, the present application provides a control method for a compressor unit of a gas compressor station. In the startup mode, after the purge operation is performed, the inlet valve and the outlet valve need to be opened to inflate the compression pipeline. However, since the compressor is not running during the purge operation, the compression pipeline is not pressurized, resulting in a pressure difference between the two sides of the inlet valve and the two sides of the outlet valve. Therefore, before opening the inlet valve and the outlet valve, it is necessary to balance the pressure difference between the two sides of the inlet valve and the two sides of the outlet valve, and then open the inlet valve and the outlet valve to gradually inflate the compression pipeline until the pressure of the compression pipeline reaches the second set pressure value.

[0111] In the warm-up mode, after the purge operation is performed, it is not necessary to balance the pressure difference on both sides of the inlet valve and the outlet valve, nor is it necessary to open the inlet valve and the outlet valve to inflate the compression line. It is only necessary to control the inlet bypass valve to open and inflate the compression line through the inlet bypass valve until the pressure of the compression line reaches the first set pressure value lower than the second set pressure value.

[0112] Thus, compared with the startup mode, the warm-up mode reduces the venting loss of natural gas through the inlet valve and the outlet valve by only inflating the compression pipeline through the inlet bypass valve, thereby reducing the waste of resources during the test run of the compressor unit of the compressor station. In addition, since the compression pipeline only needs to be inflated to a first set pressure value lower than the second set pressure value in the warm-up mode, the compressor can be tested at a lower pressure, thereby further reducing resource consumption.

[0113] The above mainly introduces the solution provided by the embodiment of the present application from the perspective of the method. In order to realize the above functions, it includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific use and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0114] The embodiment of the present application can divide the functional modules of the compressor unit of the compressor station according to the above method example. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware or in the form of software functional modules. Optionally, the division of modules in the embodiment of the present application is schematic and is only a logical functional division. There may be other division methods in actual implementation.

[0115] An embodiment of the present application also provides a computer-readable storage medium, which includes computer execution instructions. When the computer execution instructions are executed on a computer, the computer executes the control method for the compressor unit of the gas compressor station provided in the above embodiment.

[0116] An embodiment of the present application also provides a computer program product, which can be directly loaded into a memory and contains software code. After being loaded and executed by a computer, the computer program product can implement the control method of the compressor station compressor unit provided in the above embodiment.

[0117] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A compressor unit of a gas compressor station, characterized in that: include: A compressor, wherein the inlet of the compressor is connected to an inlet pipeline for conveying natural gas to be compressed, and the outlet of the compressor is connected to an outlet pipeline for conveying compressed natural gas; An inlet valve, arranged on the inlet pipeline, for controlling the conduction or disconnection of the inlet pipeline; An outlet valve, arranged on the outlet pipeline, for controlling the conduction or disconnection of the outlet pipeline; An inlet bypass pipeline, one end of which is connected to one side of the inlet valve, and the other end of which is connected to the other side of the inlet valve; an inlet bypass valve is also provided on the inlet bypass pipeline; After performing the purging operation included in the warm-up mode, the inlet bypass valve is controlled to be opened, the inlet valve is controlled to be closed, and the outlet valve is controlled to be closed, so that the compression line is charged through the inlet bypass valve; the compression line is the line between the inlet valve and the outlet valve; When the pressure of the compression pipeline reaches a first set pressure value, the warm-up operation included in the warm-up mode is performed; the first set pressure value is lower than the second set pressure value corresponding to the compression pipeline in the start-up mode.

2. The compressor unit of the gas compressor station according to claim 1, characterized in that: The compressor unit of the compressor station also includes: an anti-surge pipeline, one end of which is connected to the inlet of the compressor, and the other end of which is connected to the outlet of the compressor; An anti-surge valve, arranged on the anti-surge pipeline, for controlling the conduction or disconnection of the anti-surge pipeline; The controller is configured as: In response to receiving the warm-up mode execution instruction, the anti-surge valve is controlled to open, and the warm-up mode starts to be executed.

3. The compressor unit of the gas compressor station according to claim 2, characterized in that: The controller is further configured to: Acquire valve information of the anti-surge valve; the valve information includes one or more of the following: opening information, state information of fully open contacts; Based on the valve information, determining whether the anti-surge valve is in a fully open state; When the anti-surge valve is in a non-fully open state, a prompt message is output, where the prompt message is used to prompt a user that the anti-surge valve needs to be opened.

4. The compressor unit of the gas compressor station according to claim 1, characterized in that: The compressor unit of the compressor station also includes: An ejector device, one end of which is connected to the outlet pipeline, and the other end of which is connected to the compression pipeline; The warm-up operation included in executing the warm-up mode includes: The compressed natural gas in the outlet pipeline passing through the outlet valve is injected into the compression pipeline by the injection device to continue to inflate the compression pipeline; When the pressure of the compression line meets the dry gas sealing requirement of the compressor, the compressor starts to operate to perform the warm-up operation included in the warm-up mode.

5. The compressor unit of a gas compressor station according to any one of claims 1 to 4, characterized in that: The warm-up operation is used to instruct the compressor to operate at a second speed lower than the first speed until a set time is reached; wherein the first speed is the lower limit of the speed range corresponding to the compressor to meet the mains pressure; the mains pressure is the pressure required to transmit natural gas in the mains pipeline.

6. The compressor unit of a gas compressor station according to any one of claims 1 to 4, characterized in that: The compressor unit of the gas compressor station further comprises: Air cooler; Oil cooler; Before executing the purging operation included in the warm-up mode, the operating status of the air cooler and / or the oil cooler is determined by running the air cooler for a first preset time period and / or running the oil cooler at a preset frequency for a second preset time period. The operating status is used to determine whether there is an abnormality in the air cooler and / or the oil cooler.

7. A control method for a compressor unit of a gas compressor station, characterized in that: include: After performing the purging operation included in the warm-up mode, the inlet bypass valve is opened, the inlet valve is closed, and the outlet valve is closed, so that the compression line is charged through the inlet bypass valve; the compression line is the line between the inlet valve and the outlet valve; When the pressure of the compression pipeline reaches a first set pressure value, the warm-up operation included in the warm-up mode is performed; the first set pressure value is lower than the second set pressure value corresponding to the compression pipeline in the start-up mode.

8. The control method according to claim 7, characterized in that: The control method further comprises: In response to receiving the warm-up mode execution instruction, the anti-surge valve is controlled to open and the warm-up mode is started to be executed.

9. A computer-readable storage medium, characterized in that: When the computer-executable instructions stored in the computer-readable storage medium are executed by a processor of an electronic device, the electronic device can execute the control method as claimed in claim 7 or 8.

10. A computer program product, characterized in that The computer program product comprises: a computer program or instructions, and when the computer program or instructions are run on a computer, the computer is caused to execute the control method according to claim 7 or 8.

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