CN116203906A - Improved full-automatic control method and system for post-compression air station - Google Patents

Abstract

The invention provides a full-automatic control method and a full-automatic control system for an improved post-compression gas station, wherein an oil gas regulation center sends a command to a station control system through a one-key start-stop station; after receiving the command, the station control system switches the complex process flow by one key; the load distribution controller is automatically put into use and automatically withdrawn according to an automatic control function; the station control system automatically sets start-stop priority; the compressor unit one-key cutting machine controller judges whether the number of the existing operation units reaches a set value of the pressure of the in-out station according to the start-stop priority of the compressor unit, and automatically completes the unit increasing and decreasing operation; loading and unloading the rotating speed of a single unit; through the one-key start-stop control technology, more energy can be put into national pipe network safe operation and balance law through central scheduling, comprehensive remote control technology continuous optimization is achieved, a set of comprehensive remote control technology sequence of the gas station is established, comprehensive automatic control of the gas station is achieved, daily scheduling operation is simplified, and natural gas pipe network management and control level is improved.

Description

Improved full-automatic control method and system for post-compression air station

Technical Field

The invention relates to the technical field of control of gas stations, in particular to a full-automatic control method and system for an improved post-gas station.

Background

The natural gas pipeline is an industrialized mass production system with comprehensiveness, production continuity and scattered equipment layout, and is provided with a first station, a pipe cleaning station, a pressurizing station, a sub-conveying station, a last station and the like, and comprises the technological processes of filtering, heating, metering, pressure regulating, emptying, pollution discharge, sub-conveying, air compressing and pressurizing and the like. The European and American pipeline operation enterprises accumulate rich advanced natural gas pipeline network regulation and control operation and maintenance experience, and the gas station is comprehensively and remotely controlled to forcefully support the regulation and control operation. Taking Italy SNAM company as an example, the remote control rate of a station yard of a primary natural gas pipeline, automatic separate transmission and one-key start-stop of a compressor reach 100 percent. Compared with the traditional Chinese medicine, the traditional Chinese medicine still has a gap. Along with the continuous development of the long-distance natural gas pipeline network, the consolidation and deepening of the regional management mode/production management mode and the continuous promotion of the intelligent pipeline construction concept in China, higher requirements are provided for the remote control level and the control function of the gas pipeline.

The construction of the remote control operation function of the one-key start-stop station of the gas station in 2018, especially the construction of the one-net of the whole country, is formed, the comprehensive remote control upgrading and reconstruction are comprehensively made for improving the unified regulation and control level of the natural gas pipe network, on the basis of analyzing the current status quo of the regulation, operation, production, operation and maintenance management of the current natural gas pipe network, the control function of the one-key start-stop station of all the gas stations is gradually realized by stages from point to line and from line to surface by taking the typical gas station of the test point as the starting point, and the following problems are caused in the existing gas station; 1. before the station is started, the station needs to be informed of the site in advance, and a plurality of operation and maintenance personnel on the site cooperate together to manually conduct the station technological process, so that the operation amount on the site is large and the preparation time is long; 2. before starting, the auxiliary systems (plant fans, air compressors and the like) of the unit part cannot be started in an interlocking way; auxiliary systems (a water cooling system, a frequency converter cooling system, a dry gas sealing heater and the like) of the compressor body of the partial gas station cannot be started in an interlocking way, manual operation is assisted by on-site operation and maintenance personnel, the automation control level of a unit is low, and the operation is complex; 3, the remote control means of the oil gas regulation center to the air compression station is single, and the remote control means only have the functions of starting and stopping the compressor, switching the valve and regulating the pressure, and can not realize the starting and stopping of other key equipment of the air compression station, the switching of the compressor unit and the integral starting and stopping of the air compression station; 4, the load distribution function of the parallel compressor unit cannot be automatically put into operation, manual put into operation on site is needed, and the single compressor unit is connected and disconnected in a network manner and is manually assisted on site to complete operation; 5, the compressor unit has no remote rotating speed control function, the control mode is single, and the control authority is lost under the condition that the load distribution pressure control fails; step optimization cannot be realized by pressure adjustment, and adjustment is frequent and time-consuming; when the whole pipe network needs to be optimally operated and adjusted, the on-site completion response is slow, the requirements of emergency start-up and start-up are not met, and the pressure and the delivery requirements of the pipe network cannot be met in a short time; therefore, a full-automatic control method and a full-automatic control system for an improved post-compression gas station are provided.

Disclosure of Invention

In order to solve the problems, the invention provides a full-automatic control method and a full-automatic control system for an improved post-compression air station, so as to more exactly solve the problems that before the existing compression air station is started, the site needs to be informed in advance, the auxiliary systems of the unit parts cannot be started in an interlocking way, the remote control means of an oil-gas regulation and control center to the compression air station is single, the load distribution function of a parallel compressor unit cannot be automatically put into use, the compressor unit has no remote rotating speed control function, the control mode is single, the pressure regulation cannot realize step optimization, and the regulation is frequent and takes long time.

The invention provides a full-automatic control method of an improved post-pressure gas station, which comprises the following steps:

s1: the oil gas regulation center starts and stops the station to send a command to the station control system through one key;

s2: after receiving the command, the station control system switches the complex technological processes such as positive and negative transmission, transfer and supply among different pipelines and gas stations by one key;

s3: the automatic control function of the load distribution controller is automatically put into use and automatically withdrawn according to the one-key start-stop station requirement; the single compressor unit can automatically grid and off-grid according to the one-key start-stop requirement; the load distribution automatically controls the loading and unloading of the compressor unit according to the pressure control requirement of the natural gas pipeline network;

s4: the station control system automatically sets the start-stop priority according to factors such as the intact or fault state of the compressor, the accumulated running time and the like;

s5: the one-key compressor unit controller automatically starts the spare compressor unit according to the start-stop priority of the compressor unit; the automatic grid connection is controlled by a load distribution controller; the compressor unit automatically exits the network and exits the load distribution control, and then normal shutdown is executed;

s6: judging whether the number of the existing running units reaches a set value of the pressure of entering and exiting the station, giving out a prompt alarm for automatically increasing and decreasing the units, and automatically completing the increasing and decreasing operation of the units by the station control system after confirming the alarm;

s7: when the unit load reaches a manual rotation speed regulation limit value set by a station control system, the station control system sends out a 'forbidden speed rise comprehensive alarm' and prompts the SCADA system to remind a center of dispatching; and the oil gas regulation center remotely loads and unloads the rotating speed of the single unit.

Further, in step S1, the one-key start-stop station includes a one-key booster start-stop station and a one-key stop-stop station; the supercharging starting station automatically conducts the positive supercharging process flow of the station yard through the station control system, the peripheral auxiliary system of the compressor unit automatically starts, the load distribution function automatically starts, the compressor unit automatically connects to the grid, and the compressor unit automatically loads according to the pressure control requirement.

Further, the step of one-key pressurizing start station is preceded by a step of preselecting a compressor, an air compressor, a pressure regulating branch, a metering branch, a branch conveying branch and other equipment which are standby according to the oil gas regulation center.

Further, the step of one-key stop comprises one-key stop and one-key stop-to-station crossing of all compressor units; stopping all compressors to exit for the load distribution function, returning the compressor units to the network, and stopping the compressor units one by one; and after stopping all compressors, sequentially closing the inlet valve and the outlet valve, and automatically opening the station crossing valve after pressure balance.

Further, in the step S2, the one-key switching process of the complex process flow is automatically determined and controlled by the logic program.

Further, in the step S5, in which the backup compressor unit is automatically started up and the step of performing a normal shutdown is performed,

according to the start-stop priority signal of the compressor unit, if a plurality of units are required to operate, starting the next unit after one unit is successful in starting, the anti-surge valve is closed and the minimum load is reached; if the pre-stopping unit is firstly reduced to the minimum load during the cutting operation, the pre-stopping unit is stopped after the new unit is started to allow loading.

Further, in the step of controlling the automatic grid-connected load distribution controller, the automatic control is performed according to the rotation speed under the condition of the load distribution of the compressor unit, and the manual control of the rotation speed is stopped.

Further, in the step of controlling the load distribution of the automatic network withdrawal and withdrawal of the compressor unit, the automatic control of the rotating speed of the compressor unit under the load distribution of the compressor unit is changed into the manual control of the rotating speed.

An improved fully automatic control system for a post-compression gas station, comprising:

the one-key start-stop module is used for starting one-key start-stop stations and ending one-key start-stop stations;

the station control system is used for switching the complex process flow by one key;

the load distribution controller is used for automatically controlling the function to be automatically put into use and automatically withdraw; the single compressor unit is automatically connected with and disconnected from the network; automatically controlling the loading and unloading of the compressor unit;

the one-key cutting machine controller of the compressor unit is used for automatically checking whether the pressure of the compressed air pipeline is normal or not for automatically starting and stopping the standby compressor unit, automatically connecting and disconnecting the network;

the state feedback and alarm detection module is used for automatically judging whether the state of equipment related to the one-key station is normal or not;

and the in-station process flow conduction module is used for automatically checking whether the station process flow meets the station starting requirement.

The invention has the beneficial effects that:

1. according to the one-key start-stop station control technology, manual intervention operation steps are reduced, the field labor intensity is reduced, the labor efficiency is improved, the manual misoperation probability is reduced, meanwhile, the safe reliability of operation of the gas station is improved, more energy can be put into the safe operation and balance rule of a national pipe network through central scheduling, so that a more effective supply-keeping scheme is implemented, the comprehensive remote control technology is continuously optimized, remarkable improvement is brought to centralized regulation and control and operation maintenance of the gas station, a comprehensive remote control technology sequence of the gas station is established, comprehensive automatic control of the gas station is realized, daily operation behavior of scheduling is simplified, and operation risks are reduced, so that the management and control level of a natural gas pipe network is improved;

2. the oil gas regulation center is provided with a machine starting number selection switch, a machine selecting number is not set, a machine priority is not set, the oil gas regulation center is provided with a starting machine set increasing command and a machine switching command reducing command, and a machine preselection function is set in a station control SCADA system to realize manual selection of the machine priority.

Drawings

FIG. 1 is a schematic flow chart of a method for fully automatically controlling an improved post-compressor station according to the present invention;

FIG. 2 is a schematic diagram of the one-touch boost start-up control logic of the present invention;

FIG. 3 is a schematic diagram of the one-touch docking control logic of the present invention;

FIG. 4 is a schematic diagram of a one-touch start-stop station of the present invention, as implemented in a front-to-back variation.

The implementation, functional features and advantages of the present application will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Detailed Description

In order to more clearly and completely describe the technical scheme of the invention, the invention is further described below with reference to the accompanying drawings.

Referring to fig. 1-4, the present invention provides a fully automatic control method for an improved post-compression gas station, which includes:

s1: the oil gas regulation center starts and stops the station to send a command to the station control system through one key; the one-key start-stop station comprises a one-key pressurizing start-stop station and a one-key stop station; the method comprises the steps that a pressurizing start station automatically conducts a positive pressurizing process flow of a station yard through a station control system, a peripheral auxiliary system of a compressor unit is automatically started, the compressor unit is automatically started, a load distribution function is automatically put into operation, the compressor unit is automatically connected with a grid and is automatically loaded according to pressure control requirements; the step of one-key stop comprises one-key stop of all compressor units and one-key stop to station crossing; stopping all compressors to exit for the load distribution function, returning the compressor units to the network, and stopping the compressor units one by one; one key stop to stop the station beyond is that after stopping all compressors, sequentially closing the inlet and outlet valves, and automatically opening the station beyond valve after pressure balance;

specifically, an oil gas regulation center sends a one-key pressurizing start command, and after a station control system receives the command, the positive pressurizing process flow of a station is automatically conducted, the peripheral auxiliary system of the compressor unit is automatically started, the load distribution function is automatically put into operation, the compressor unit is automatically connected with a grid and is automatically loaded according to the pressure control requirement; when the received command is a one-key stop, the one-key stop is divided into two modes of stopping all compressor units in one-key stop and stopping all compressor units in one-key stop to stop beyond; stopping all compressors for exiting the load distribution function, removing the network of the compressor units, stopping the compressor units one by one, and starting to reduce the load of the second running unit after the rotating speed of the first running unit is 0 until the normal stopping of all the units is completed. One key stop to stop the station beyond is that after stopping all compressors, sequentially closing the inlet and outlet valves, and automatically opening the station beyond valve after pressure balance; the air compressor station is generally provided with more than 20 blowers and exhaust fans in a compressor factory, and the starting, stopping and running modes of key dynamic equipment are optimized in a station control system, so that the same life cycle of the equipment is ensured; the method effectively solves the problems that a single device is manually selected to execute start and stop, the number is large, and the operation amount of a dispatcher is large; the time length of the fan is different due to the difference of human subjective selection and operation habits, and the fault rate of overlong start time is high; maintaining according to a natural time period, excessively maintaining for too short starting time, and wasting resources; the problem of untimely maintenance of overlong starting time; in the one-key start-stop operation, the steps requiring human intervention operation are fully automatically modified, the human intervention operation is removed, and the success rate of the one-key start-stop is ensured; resetting on a cabinet panel before starting a compressor frequency converter; manual activation or reset of dry gas seals and fuel gas heaters, etc.; confirming and resetting the compressor on the cabinet panel before starting the compressor; manual start of the water cooling system, etc.; the reset command of the single unit ESD, the factory ESD and the total station ESD is accessed to the station control and central control operation interface; after the one-key starting operation button is pressed, the ESD reset command is automatically executed, and the reset operation is not manually executed any more; the field labor intensity is reduced, the labor efficiency is improved, the probability of manual misoperation is reduced, and the safety and reliability of the operation of the gas station are improved; the central dispatching can put more effort into the safe operation and balance rules of the national pipe network, so that a more effective supply protection scheme is implemented.

S2: after receiving the command, the station control system switches the complex technological processes such as positive and negative transmission, transfer and supply among different pipelines and gas stations by one key; the one-key switching process of the complex process flow is automatically judged and controlled by a logic program; the station control system reserves the original station control SCS system, UCS control system and load distribution control system without integrating, does not add or externally connect a new control system, and ensures the safety of a station ESD system, a unit core control system, a surge protection system, a vibration and overspeed protection system and the like; the key valve which affects automatic station starting and automatic process flow switching is modified, and is changed from manual operation to electric operation, so that automatic switching is realized; the remote control executing mechanism, the differential pressure transmitter, the flow regulating valve and other devices are additionally arranged at the necessary positions so as to meet the one-key conduction/switching function of the process flow; an electric plug valve is added to a bypass pipeline of the inbound valve, a differential pressure is set to judge the opening condition of the valve, and the action of the interlocking balance valve is performed. The station auxiliary system and the compressor auxiliary system which need to be started manually are transformed into interlocking starting; auxiliary systems which are less logically associated with a one-key start-stop station, such as a fixed fire water system, an electric comprehensive protection system, a station process instrument wind-water dew point and the like, are not set as judging conditions before start-stop; the logic control replaces manual operation, and after a one-key switching command is issued, the process condition judgment and the flow switching control process are automatically completed, so that the operation steps without human intervention are realized.

S3: the automatic control function of the load distribution controller is automatically put into use and automatically withdrawn according to the requirements of the one-key start-stop station; the load distribution controller is in the built gas station, and before the grid-connected and grid-disconnected operation of each unit is needed to be realized on a load distribution control system interface or a single unit HMI picture, the grid-connected and grid-disconnected operation is needed to be connected into a remote control operation interface of a station control and oil gas regulation center; the load distribution control function of the parallel compressor unit can be automatically put into use and automatically withdrawn according to the requirements of a one-key start-stop station; the single compressor unit can automatically grid and off-grid according to the one-key start-stop requirement; the load distribution automatically controls the loading and unloading of the compressor unit according to the pressure control requirement of the natural gas pipeline network; the implementation of the load distribution automatic regulation function can simultaneously have two control modes of inbound pressure control and outbound pressure control, and the load distribution is balanced when the multiple units are operated in parallel.

S4: the station control system automatically sets the start-stop priority according to factors such as the intact or fault state of the compressor, the accumulated running time and the like; the oil gas regulation and control center preselects the number of the starting machines according to the requirements of the gas extraction pipe network, and the machine sets start and stop according to the priority order without on-site auxiliary operation; and meanwhile, increasing start and decreasing stop operations are set.

S5: the one-key compressor unit controller automatically starts the spare compressor unit according to the start-stop priority of the compressor unit; the automatic grid connection is controlled by a load distribution controller; the compressor unit automatically exits the network and exits the load distribution control, and then normal shutdown is executed; according to the automatic control of the rotating speed under the distribution of the load for the compressor unit, stopping the manual control of the rotating speed; the whole process of the one-key cutting machine does not need on-site auxiliary operation; the rotation speed is automatically controlled under the condition of grid connection, namely the distribution of the input load of the compressor unit, and the manual rotation speed control is stopped; the automatic control of the rotating speed of the compressor unit under the exiting load distribution is converted into the manual control of the rotating speed, and the automatic control of the rotating speed of the network exiting, namely the compressor unit under the exiting load distribution is converted into the manual control of the rotating speed; in the realization of the function of central control/station control for regulating the rotation speed of the unit, the process system, shaft vibration, start-stop unit and the like of the UCS control system of the unit can be displayed on a station control picture; the matched transformation is implemented on the picture of the station control and central control SCADA system, and one-key start-stop station and main process flow operation are realized in the picture; displaying the sequence progress of the one-key start-stop related function; the process and the equipment to be started can be preselected; displaying real-time trend and history curve of key parameters; adding a data export function; giving equipment running state feedback and the like; the central control and station control pictures are kept consistent and do not interfere with each other, and strict authority management is realized; the unit rotating speed control function is accessed into a station control SCS operation and center remote control operation interface from a unit UCS control system, so that the rotating speed of a single unit can be manually adjusted; the key control command of the unit is connected with the station control PLC through a hard wire, so that key operations such as remote start and stop, rotation speed control, network merging and exiting of the unit are accessed to a station control and center remote control operation interface, and the problem that the original grid-connected and network exiting operation of each unit needs to be realized on a load distribution control system interface or a single-unit HMI picture is solved; the method comprises the steps of carrying out a first treatment on the surface of the When a plurality of units are required to operate, one unit is started successfully, the anti-surge valve is closed and the next unit starts to start after the minimum load is reached; when the machine is switched on, the pre-stopping machine set is firstly reduced to the minimum load, and the pre-stopping machine set is stopped after the new machine set is started to allow loading; the start-stop operation is minimized to the disturbance of the pressure of the whole pipe network.

S6: judging whether the number of the existing running units reaches a set value of the pressure of entering and exiting the station, giving out a prompt alarm for automatically increasing and decreasing the units, and automatically completing the increasing and decreasing operation of the units by the station control system after confirming the alarm; optimizing the control logic of the step length of the pressure setting of the station in and out, increasing the step length value of the pressure setting, and realizing the one-step function of the pressure setting; allowing the lowest pressure setting step value to be not less than 0.5MPa; after the central dispatching is carried out once, the set value of the pressure of the entering and exiting station is given, the unit is slowly accelerated, the risk of shutdown is avoided, the time consumption for adjustment is reduced, and the workload of a dispatcher is reduced;

s7: when the unit load reaches a manual rotation speed regulation limit value set by a station control system, the station control system sends out a 'forbidden speed rise comprehensive alarm' and prompts the SCADA system to remind a center of dispatching; the oil gas regulation center remotely loads and unloads the rotating speed of a single unit, so that the fault shutdown caused by continuously increasing the load of the unit is avoided; the station control system is provided with an alarm prompt function when manual rotation speed adjustment is performed, and when the key parameters of the unit reach the limit value and the load of the unit can not be increased any more, the oil gas regulation center remotely loads and unloads the rotation speed of the single unit; the manual speed control function is used in the following cases: (1) the load distribution control function is invalid, and the unit is still controllable; (2) in a multi-machine load distribution control mode, the load is obviously unbalanced, and a single machine unit needs to be adjusted; (3) in the multi-machine load distribution control mode, a certain single machine unit needs more or less output due to the reason of the single machine unit; (4) under the condition of multi-machine operation, when the key parameters of a certain single machine set reach the alarm limit to influence the load improvement, other machine sets need to be manually adjusted; (5) when the pipeline is greatly adjusted and the delivery pressure is greatly changed, the shutdown risk is reduced for ensuring the stable rotating speed of the unit.

In the embodiment, the step of one-key pressurizing station starting comprises the steps of preselecting a compressor, an air compressor, a pressure regulating branch, a metering branch, a branch conveying branch and other equipment which are mutually standby according to an oil gas regulation center; the specific oil-gas regulation center is provided with a machine starting number selection switch, a machine selecting number is not set, a machine set priority is not set, and the oil-gas regulation center is provided with a starting increasing machine set and a machine set switching command is reduced; a unit preselection function is set in a station control SCADA system, so that manual selection of unit priority is realized; the priority selection of the unit is not limited by the central control and station control authority, and unit state feedback including operation, standby and faults is added in an HMI picture; before the operation of the one-key start station, a compressor, an air compressor, a pressure regulating branch, a metering branch, a branch conveying branch, other devices which are standby mutually and the like which need to be started can be preselected, so that the devices which need to be started can be controlled; and after key dynamic equipment such as fans of a ventilation system of the compressor factory building receive the starting command, the accumulated running time is taken as a priority judgment condition to realize non-differential starting.

In the embodiment, in the steps of automatically starting up and executing normal shutdown of the standby compressor unit in the step S5, if multiple units are required to operate according to the start-stop priority signal of the compressor unit, after one unit is successfully started up, the anti-surge valve is closed and the minimum load is reached, the next unit starts up; if the pre-stopping unit is firstly reduced to the minimum load during the cutting operation, the pre-stopping unit is stopped after the new unit is started to allow loading; equipment for influencing the automatic starting of a single unit, such as a single unit air cooling, dry gas sealing system, a fuel gas heater, a frequency converter and the like, is transformed and integrated into a unit UCS control system; equipment for influencing the automatic starting of all units, such as a centralized air cooler, a combined plant fan, an instrument wind system and the like, is transformed and integrated into a station control SCS control system; the automatic increasing and decreasing function of the number of the units is realized; after transformation, when the load of the unit can not be increased (the load rate is more than or equal to 90%) and the setting of the outlet pressure can not be met, or the working point on the performance curve of the compressor enters a blocking working condition area (a low-efficiency area) and can not continuously increase the excessive flow, a load distribution system gives a prompt alarm for increasing the running unit. When the working point on the performance curve of the compressor is close to a surge control line (the surge margin is less than or equal to 5 percent), namely a surge area is about to be entered, and the inlet flow is insufficient, the system gives a prompt alarm for reducing the running unit. When the pipe network transmission quantity and the working condition fluctuation change, the working point of the unit is easy to be unstable, the unit interlocking increasing and decreasing start and stop function is not set for avoiding the frequent start and stop of the unit, and the unit increasing and decreasing prompt alarm is only set, so that whether the unit needs to be increased or decreased is judged manually.

An improved fully automatic control system for a post-compression gas station, comprising:

the one-key start-stop module is used for starting one-key start-stop stations and ending one-key start-stop stations;

the station control system is used for switching the complex process flow by one key;

the load distribution controller is used for automatically controlling the function to be automatically put into use and automatically withdraw; the single compressor unit is automatically connected with and disconnected from the network; automatically controlling the loading and unloading of the compressor unit;

the one-key cutting machine controller of the compressor unit is used for automatically checking whether the pressure of the compressed air pipeline is normal or not for automatically starting and stopping the standby compressor unit, automatically connecting and disconnecting the network;

the state feedback and alarm detection module is used for automatically judging whether the state of equipment related to the one-key station is normal or not;

the in-station process flow conduction module is used for automatically checking whether the station process flow meets the station starting requirement; when the key parameters of the unit reach the limit value and the load of the unit can not be increased any more, the station control system sends a prompt of 'forbidden speed-up comprehensive alarm' to the SCADA system to remind a center of scheduling, so that the fault shutdown caused by continuously increasing the load of the unit is avoided; the oil gas regulation center remotely loads and unloads the rotating speed of a single unit; the manual speed control function is used in the following cases: (1) the load distribution control function is invalid, and the unit is still controllable; (2) in a multi-machine load distribution control mode, the load is obviously unbalanced, and a single machine unit needs to be adjusted; (3) in the multi-machine load distribution control mode, a certain single machine unit needs more or less output due to the reason of the single machine unit; (4) under the condition of multi-machine operation, when the key parameters of a certain single machine set reach the alarm limit to influence the load improvement, other machine sets need to be manually adjusted; (5) when the pipeline is greatly adjusted and the transmission pressure is greatly changed, the shutdown risk is reduced to ensure the stable rotating speed of the unit;

realizing a one-key start station; after the station control system receives a one-key station starting command, the process flow is automatically conducted, an external auxiliary system of the compressor unit is automatically started, a load distribution function is automatically put into operation, the unit is automatically connected with a network, and the system gives an automatic unit increasing and decreasing prompt according to the setting requirement of the pressure of entering and exiting the station and completes unit increase and decrease; realizing one-key stop; the one-key station stopping operation comprises a main station stopping mode such as a process of switching to a pressure station crossing after station stopping, a process of switching to a full station crossing after station stopping, a unit pressure releasing stopping, a single unit network returning, a full station ESD station stopping and the like; the regional functions of one-key conduction and the like of the main process flow are realized; the regional functions of automatic switching, conduction and the like of main technological processes such as positive, transfer, reverse transmission, separate transmission and the like are realized; optimizing the control function of the air compressing station; the optimization of the load distribution function, one-step setting of the pressure of the compressor, automatic increase and decrease of the unit prompt and the same life cycle operation of the movable equipment are realized; the automation level and the safety are improved; the remote control level is improved, so that the operation amount is reduced, the station starting time is shortened, the field labor intensity is reduced, the labor efficiency is improved, the probability of human misoperation is reduced, and the safety reliability and the automatic control level of the operation of the gas station are improved; the control technology of a typical air compression station 'one-key start-stop station' is realized, the manual intervention operation steps are reduced, the field labor intensity is reduced, the labor efficiency is improved, the probability of manual misoperation is reduced, and the safety and the reliability of the operation of the air compression station are improved; the central dispatching can put more effort into the safe operation and balance rules of the national pipe network, so that a more effective supply protection scheme is implemented.

Of course, the present invention can be implemented in various other embodiments, and based on this embodiment, those skilled in the art can obtain other embodiments without any inventive effort, which fall within the scope of the present invention.

Claims (9)

1. A method of fully automatically controlling an improved post-compression station, the method comprising:

s1: the oil gas regulation center starts and stops the station to send a command to the station control system through one key;

s2: after receiving the command, the station control system switches the complex technological processes such as positive and negative transmission, transfer and supply among different pipelines and gas stations by one key;

s3: the automatic control function of the load distribution controller is automatically put into use and automatically withdrawn according to the one-key start-stop station requirement; the single compressor unit can automatically grid and off-grid according to the one-key start-stop requirement; the load distribution automatically controls the loading and unloading of the compressor unit according to the pressure control requirement of the natural gas pipeline network;

s4: the station control system automatically sets the start-stop priority according to factors such as the intact or fault state of the compressor, the accumulated running time and the like;

s5: the one-key compressor unit controller automatically starts the spare compressor unit according to the start-stop priority of the compressor unit; the automatic grid connection is controlled by a load distribution controller; the compressor unit automatically exits the network and exits the load distribution control, and then normal shutdown is executed;

s6: judging whether the number of the existing running units reaches a set value of the pressure of entering and exiting the station, giving out a prompt alarm for automatically increasing and decreasing the units, and automatically completing the increasing and decreasing operation of the units by the station control system after confirming the alarm;

s7: when the unit load reaches a manual rotation speed regulation limit value set by a station control system, the station control system sends out a 'forbidden speed rise comprehensive alarm' and prompts the SCADA system to remind a center of dispatching; and the oil gas regulation center remotely loads and unloads the rotating speed of the single unit.

2. The method of claim 1, wherein in step S1, the one-key start-stop station comprises a one-key booster start-stop station and a one-key stop station; the supercharging starting station automatically conducts the positive supercharging process flow of the station yard through the station control system, the peripheral auxiliary system of the compressor unit automatically starts, the load distribution function automatically starts, the compressor unit automatically connects to the grid, and the compressor unit automatically loads according to the pressure control requirement.

3. The method of claim 2, wherein the step of starting the one-key boosting station is preceded by preselecting a compressor, an air compressor, a pressure regulating branch, a metering branch, a distribution branch and other devices which are standby for each other according to the oil-gas regulating center.

4. A method of fully automatically controlling an improved post-compressor-stop station as set forth in claim 3 wherein said one-key stop step comprises one-key stop and one-key stop-to-over of all compressor units; stopping all compressors to exit for the load distribution function, returning the compressor units to the network, and stopping the compressor units one by one; and after stopping all compressors, sequentially closing the inlet valve and the outlet valve, and automatically opening the station crossing valve after pressure balance.

5. The method according to claim 1, wherein in the step S2, the process of the one-key switching of the complex process flow is automatically determined and controlled by a logic program.

6. The method of claim 1, wherein in step S5, said backup compressor unit is automatically started and said normal stop is performed,

according to the start-stop priority signal of the compressor unit, if a plurality of units are required to operate, starting the next unit after one unit is successful in starting, the anti-surge valve is closed and the minimum load is reached; if the pre-stopping unit is firstly reduced to the minimum load during the cutting operation, the pre-stopping unit is stopped after the new unit is started to allow loading.

7. The method of claim 6, wherein in the step of controlling the automatic grid-connected load distribution controller, the manual control of the rotation speed is stopped according to the automatic control of the rotation speed under the load distribution of the compressor unit.

8. The method of claim 1, wherein in the step of controlling the load distribution of the compressor unit by first automatically returning the net, the automatic control of the rotational speed of the compressor unit under the load distribution is changed into manual control of the rotational speed.

9. An improved fully automatic control system for a post-compression gas station, comprising:

the one-key start-stop module is used for starting one-key start-stop stations and ending one-key start-stop stations;

the station control system is used for switching the complex process flow by one key;

the load distribution controller is used for automatically controlling the function to be automatically put into use and automatically withdraw; the single compressor unit is automatically connected with and disconnected from the network; automatically controlling the loading and unloading of the compressor unit;

the one-key cutting machine controller of the compressor unit is used for automatically checking whether the pressure of the compressed air pipeline is normal or not for automatically starting and stopping the standby compressor unit, automatically connecting and disconnecting the network;

the state feedback and alarm detection module is used for automatically judging whether the state of equipment related to the one-key station is normal or not;

and the in-station process flow conduction module is used for automatically checking whether the station process flow meets the station starting requirement.

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