RU2578297C1 - Method and device for regulation of automatic pressure control system (apcs) in the main pipeline for transferring oil products - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: invention relates to control pressure in main pipelines for oil and oil products. Device contains a program-technical complex, a programmable logic controller, a frequency converter and shutter motor drive to control the degree of its closure. Degree of shutter closing and pressure value of pumped medium in pipeline before and after the shutter are measured. Settings include coefficients of increment proportional-differential controller, as well as parameters which calculate asymmetry of shutter closing control, non-linearity of pressure variation, possibility of pulse effect on shutter and parameters that provide for the protection of process equipment upon reaching certain values of pressure of pumped medium in pipeline.

EFFECT: higher accuracy and control speed.

2 cl, 2 dwg

Description

The invention relates to automatic pressure control (SARD) systems in oil and oil products pipelines and is intended to automate the SARD settings to find the SARD settings, at which the pressure of the pumped medium in the pipeline will meet the established requirements for the operation of the pipeline.

A known method of tuning the PID controller [Polishchuk A.V. Tuning the PID controller of automatic control systems of heat power equipment. Collection of scientific papers SWorld. Materials of the international scientific-practical conference "Modern directions of theoretical and applied research 2012". - Issue 1. Volume 1. - Odessa: Kuprienko, 2012 - 96 s]. The calculation of the settings of the PID controller is performed from the conditions accepted in the power system of quality criteria, on the basis of which the dependencies of compromise settings are obtained. In the known method, the settings of the proportional-integral-differential controller (PID controller) are calculated for the inertia circuit of the automatic control system (ATS) of the temperature of the intermediate superheat steam according to experimental data obtained at the Novosibirsk TPP - 5. Algorithms for optimizing the settings of the PID controller allow stability analysis the work of the ATS with PID - the law of regulation depending on the variation in the dynamics of the regulatory object.

A device for tuning a PID controller [application for the grant of a patent for an invention RU 2007109735 A, publ. September 20, 2008, IPC G05B 13/00], consisting of a control loop, including a PID controller, a control object, an adjustable parameter sensor, a unit for comparing the adjustable parameter with its set value. The known device further comprises a control loop identification unit, a comparison unit and a PID controller settings adjustment unit, wherein the input of the control circuit identification unit is connected to the output of the comparison unit, and the output is connected to the input of the PID controller settings adjustment unit, the output of which is connected to the PID input -regulator.

There is also known a method of adaptive control according to PID law and a system for its implementation [patent for invention RU 2510956 C2, publ. 04/10/2014, IPC G05B 13/00], in which a correspondence is established between the admissible criticality levels of deviations of the configuration parameters of the managed system (PC CSS) and the criticality level of their deviations; according to the values of the decision matrix, the errors of deviations of the values of the PCs of the DC are calculated and checked for compliance with the acceptable criticality levels of the deviations of the PCs of the DCs: if they match, the previous values of the PCs of the DCs are saved and the initial content of the set of values of the decision matrix is refactored, and in case of inconsistencies, remember this the event and the calculated errors in the deviations of the PC CS values and assign a control action to the CSS based on the selection of values from the decision matrix; in case of revealing the missing and / or incorrectly set values of the configuration parameters of the DC - conduct a refactoring of the content of the set of values of the decision matrix for each PC PC for the given operating conditions of the CSS by adding the identified missing values and / or changing the incorrect values of the decision matrix; save the previous values of the PC of the CSS, assign a control action on the CSS and refactor the content of the set of values of the decision matrix by replacing the previous values of the PC CSS with the current values of the PC CSS. The system contains switching matrixes of inputs and outputs, a solver, a proportional block, a functional logic controller, an executive block, a controlled object, and an integrating-differentiating block containing K integrating-differentiating clusters, each of which contains one of K integrating blocks and one of K differentiating blocks with their own normalizing coefficients. As a result, the dynamics of regulatory processes improves and the expansion of system functionality is achieved.

The above methods and devices do not allow automatic configuration of SARD in the main oil pipeline, because for adjustment, they use the correction of the coefficients of the “classic” PID controller, the operation of which under certain operating modes of the pipeline does not ensure compliance with the requirements of the technical documentation for pipeline operation.

The automatic pressure control system is designed to maintain the pressure at the intake of the first pumped medium of the main pump unit (MHA) not lower than the permissible value, maintain the pressure not higher than the permissible value at the outlet of the oil pumping station (LPS), as well as reduce the load on the electric motors of the pump units start up. The pressure in the pipeline is maintained by the throttling method, in which the pumped medium flows through the throttle - local hydrodynamic resistance to flow (a rotary damper installed in the pipeline). Butterfly valves are regulating bodies with a variable flow area. With a change in the flow area, the hydraulic resistance changes significantly, causing changes in pressure loss and a change in the flow rate of the pumped medium.

The SARD system should ensure stable operation in the conditions of changing volumes of the pumped liquid, increasing the number of transitions from one mode of operation of the pipeline to another, errors in the work of personnel, as well as during repair work without stopping pumping. SARD modifications, incorporating adaptation algorithms to change the parameters of the control object, did not lead to the expected result, because auto-tuning process leads to uncontrolled behavior of the pipeline hydraulic system in the process of auto-tuning.

At the moment, there is no automated methodology for setting up the SARDA at the facilities of the main oil pipeline, taking into account the above problems, and the setting of the SARDE in each case is carried out empirically.

The method and device for adjusting the SARD allows you to unify and automate the tuning process, providing a predictable result of the behavior of the SARD in the changing technological environment of the pipeline.

The tasks solved by the claimed invention:

- determination of the characteristics of the current state of the hydraulic system;

- calculation of the numerical values of the SARD settings;

- verification of the compliance of the SARD settings with the requirements of regulatory and technical documentation (NTD) established for the operation of the pipeline.

The technical result of the claimed invention is the ability to automate the configuration of SARD, as well as improving the accuracy and speed of regulating the pressure of the pumped medium in the pipeline.

The specified technical result is achieved by the fact that the device for tuning the automatic pressure control system (SARD) in the main pipeline for pumping petroleum products contains: a software and hardware complex (NTK) of the SARD settings for determining the values of the SARD settings and verifying the compliance of the SARD settings with the established pipeline operation requirements, moreover, the PTC contains means for connecting to a SARD containing a programmable logic controller (PLC), a frequency converter ( H) and an electric damper valve, consisting of an engine, a gearbox and an electric drive control unit, configured to control the degree of closure of the damper, while the SARD is configured to supply a control signal to the electric actuator of the damper to control the degree of its closure, which determines the pressure value of the pumped oil products in the main pipeline , SARD and PTK have means for measuring the degree of shutter closure and the pressure values of the pumped oil products in the main pipeline before and after the shutter, the PTC is configured to adjust the coefficients of the incremental proportional-differential controller (PD-regulator), as well as parameters that take into account the asymmetry of the shutter closure regulation, the non-linearity of the pressure change when the shutter closure degree is changed, the pulse action on the shutter when there is no change in pressure for eliminate static mismatch between the set point and the current pressure value, and the PTC contains a storage unit for passport data of the main pipes a cable configured to record passport data of the main pipeline that meets the established requirements for its operation, an experimental data storage unit, configured to record measured data on the degree of shutter closure, pressure values of the pumped oil products in the main pipeline before and after the shutter, and data on pressure changes from the beginning of observations before the establishment of a constant pressure in the main pipeline before and after the damper, the isolation unit is transitional x processes in the main pipeline, which determines the areas of transient changes in the pressure of the pumped oil products in the main pipeline, a transient data storage unit, configured to record the measured data of the transient sections, a comparison unit, configured to receive data from the transient data storage unit and the unit storing passport data of the main pipeline, comparing the measured data of transient sections in the main pipeline for the initial settings of the SARD with the established requirements for the operation of the main pipeline and the decision on the need for a second cycle of the settings of the SARD in case of experimental data not meeting the requirements for the operation of the main pipeline, a data processing unit configured to receive data from the storage unit of passport data of the main pipeline, experimental data storage unit and transition data storage unit processes, obtaining the initial SARD settings, processing the received data and generating the recommended SARD settings, the SARD PLC and the SARD settings PTK contain means for receiving the recommended SARD settings and starting a repeated SARD setting cycle to find the SARD settings that comply with the established requirements pipeline operation.

In addition, the technical result of the claimed invention is achieved due to the fact that in the method of setting up the automatic pressure control system in the main pipeline for pumping petroleum products using the device according to claim 1, there is a data collection step, in which passport data is entered into the storage unit for passport data of the main pipeline the main pipeline that meets the established requirements for its operation, select the initial settings for the SARD, including incremental proportional-differential regulator coefficients, as well as parameters that take into account the asymmetry of regulation of shutter closure, non-linearity of pressure change when changing the degree of shutter closure, pulse action on the shutter when there is no pressure change to eliminate static mismatch between the set point and the current pressure value, connect the software and hardware complex (PTC) settings SARD to SARD, measure the degree of closure of the valve, the pressure of the pumped oil in the main pipeline before and after the shutter during the operation of the SARD, then the measured degree of closure of the shutter, the pressure of the pumped oil products in the main pipe before and after the shutter and data on the pressure change from the start of observations to the establishment of a constant pressure in the main pipe before and after the shutter are recorded in the experimental data storage unit, after that, the areas of transient changes in the pressure change of the pumped oil products in the main pipeline are determined water and measure the values of the pressure changes in such areas in the transient separation unit in the pipeline, and record the measured data of the transient sections in the transient data storage unit, carry out the data processing step, which transfers data from the transient data storage unit to the data comparison unit and storage unit for passport data of the main pipeline, compare the measured data of the transient sections in the main pipeline for the initial settings SARD cards with the established requirements for its operation, after which they decide on the need for a second cycle of the SARD settings in case the experimental data do not meet the established requirements for the operation of the main pipeline, transfer data from the passport data storage unit of the main pipeline, the experimental data storage unit, and the unit to the data processing unit transient data storage, initial settings for SARD, process the received data and form Recommended settings for CA and carry out the data verification step, at which they transfer the recommended settings for SARD to PLC SARD and PTK settings for SARD and start a repeated cycle for setting SARD to find the settings for SARD, in which the established requirements for the operation of the main pipeline are met.

The claimed invention is illustrated by drawings:

FIG. 1 is a flow chart of a process for regulating pressure in a main pipeline for pumping petroleum products;

FIG. 2 is a flowchart of a SARD configuration process.

The designations indicated in the drawings are shown by the following positions:

1 - automatic pressure control system (SARD);

2 - main pumping station (MHC);

3 - oil pumping station (NPS);

4 - main pumping units (MNA);

5 - programmable logic controller (PLC);

6 - frequency converter (IF);

7 - shutter;

8 - electric shutter;

9 - electric motor of the shutter;

10 - a reducer of an electric drive of a shutter;

11 - electric drive control unit;

12 - pressure control unit (URD);

13 - software and hardware complex (PTK) settings SARD;

14 - block storage of passport data;

15 - block storage of experimental data;

16 - block selection of transients;

17 - block storage of transient data;

18 is a comparison block;

19 is a data processing unit.

In FIG. 1 shows a flow chart of a process for regulating pressure in a main pipeline for pumping petroleum products. The automatic pressure control system 1 (SARD), the settings of which are carried out in accordance with the claimed invention, is designed to maintain a pressure at the inlet of a main pumping station 2 (MHC) of at least a set value and an outlet pressure of an oil pumping station 3 (LPS) of no more than a set value , as well as to reduce the load on the electric motors of the main pumping units 4 (MNA) during starts.

The composition of the SARD 1 includes a programmable logic controller 5 (PLC), a frequency converter 6 (IF) and a damper electric drive 8, which consists of a motor 9, a gearbox 10, an actuator control unit 11 and a damper position sensor (not shown). The regulation is carried out using a rotary damper 7 installed in the pressure control unit 12 (URL) at the output of the MHC 2. An electric actuator 8 with frequency regulation controls the rotation of the damper 7. The SARD 1 has the ability to supply a control signal to the frequency converter 6, which controls the electric actuator 8 damper by changing the speed of the actuator 8 to control the degree of closure of the damper 7, which determines the value of the pressure of the pumped medium in the pipeline. The electric actuator 8 is equipped with a control unit 11 and a damper position sensor that linearly converts the position of the damper 0-100% of the degree of closure into an output current signal of 4-20 mA.

In each SARD regulation cycle, the current value of the regulation parameter in engineering units is compared with the setpoint also set in engineering units. As a result, an error signal is generated. Errors of different circuits are reduced to the same format by the normalizing link. The coefficients of the P-controller determine the speed and direction of movement of the shutter 7 depending on the magnitude and sign of the error signal. The coefficients of the D-controller adjust the value of the error signal depending on the rate of change of the SARD control parameters. If there is no change in pressure to eliminate the static mismatch between the set point and the current pressure value, instead of the integral link in the "classic" PID controller, a pulse action on the control damper 7 is turned on. This mode allows you to reduce the influence of the inertia of the system and reduce the sensitivity of the regulator to small pressure waves. The interval between control cycles is set in the SARD settings.

The output driver in PLC 5 converts the current error value into a proportional 4-20 mA current output signal. Further, this signal is fed to the inverter 6, which generates a supply voltage of ≈380 V, f = ± (fmin ... fmax) Hz for the electric actuator 8 of the damper. The sign of the frequency of the supply voltage determines the direction of rotation of the motor 9 and the damper 7.

The claimed SARD configuration device contains a software and hardware complex 13 (PTK) of the SARD configuration, which has means for connecting to the SARD 1, which determines the values of the SARD settings and checks the compliance of the SARD settings with the established requirements of the normative and technical documentation (NTD) for the operation of the pipeline. SARD 1 and PTK 13 have means for measuring the degree of closure of the shutter 7 and the pressure of the pumped medium in the pipeline before and after the shutter 7. These requirements for the operation of the pipeline include the following:

- the accuracy of maintaining the average pressure value relative to the control set point during the steady state operation of the pipeline should be at least ± 0.02 MPa;

- the settings and technical characteristics of the SARD MNS 2 equipment in the event of a stop of one MNA 4 at the subsequent pumping medium flow of the NPS 3 or start-up of one MNA 4 at the pumping medium next to the pumped medium of the NPS 3 should provide a pressure deviation from the set value at the output of the NPS 3 a value not exceeding 4% of the permissible working pressure at the outlet of the NPS 3.

SARD settings include the coefficients of the proportional differential controller (PD-regulator): the coefficients of the proportional link of the regulator (P-regulator) and the coefficients of the differential link of the regulator (D-regulator). The coefficients of the P-controller determine the speed and direction of movement of the valve depending on the magnitude and sign of the error signal. The error signal is the difference between the current SARD control parameters and the settings. The coefficients of the D-controller adjust the value of the error signal depending on the rate of change of the SARD control parameters.

In addition, the SARD settings include parameters that take into account the asymmetry of regulation of the shutter closure, non-linearity of pressure changes when changing the shutter closure degree, the possibility of impulse action on the shutter 7 in the absence of a change in pressure to eliminate the static mismatch between the set point and the current pressure value, and parameters that provide protection technological equipment upon reaching certain pressure values of the pumped medium in the pipeline.

In FIG. 2 shows a flowchart of the SARD configuration process. PTC 13 contains a unit for storing passport data 14 of the pipeline system, a unit for storing experimental data 15, a unit for isolating transients 16 in the pipeline, a unit for storing transient data 17, a comparison unit 18, and a data processing unit 19.

The passport data storage unit 14 of the pipeline system records the passport data of the pipeline system that meets the established requirements for the operation of the pipeline. The indicated passport data of the pipeline system include the following parameters:

- minimum working pressure at the inlet of the NPS 3;

- allowable working pressure at the outlet of the pump 3;

- maximum permissible pressure in the manifold;

- maximum allowable pressure drop across the shutter 7;

- the movement time of the shutter 7 between the extreme positions with the maximum possible speed;

- the duration of the SARD regulation cycle.

The experimental data storage unit 15 records the measured data on the degree of shutter closure, the pressure of the pumped medium in the pipeline before and after the shutter 7, and data on the pressure change from the beginning of observations to the establishment of a constant pressure in the pipeline before and after the shutter 7.

The transient isolation unit 16 in the pipeline is intended for determining transient areas of the pressure change of the pumped medium in the pipeline.

The transient data storage unit 17 records the measured data of the transient sections.

The comparison unit 18 is designed to receive data from the transient data storage unit 16 and the passport data storage unit 14 of the pipeline system and to compare the measured data of the transient sections in the pipeline for the initial SARD settings with the established requirements for operating the pipeline. If the experimental data do not meet the established requirements for the operation of the pipeline, a decision is made in the comparison unit on the need for a repeated SARD tuning cycle.

The data processing unit 19 receives data from the passport data storage unit 14 of the pipeline system, the experimental data storage unit 15 and the transient storage unit 17, receives the initial SARD settings, processes the received data and generates the recommended SARD settings.

PLC 5 SARD and PTK 13 SARD settings have the means to obtain the recommended SARD settings and start a second SARD settings cycle to find the SARD settings that will meet the established requirements for the operation of the pipeline.

A feature of the claimed invention is the use in an adjustable SARD 1 of an incremental PD controller in conjunction with additional parameters that take into account the asymmetry of regulation of the shutter closure, non-linearity of pressure change, the possibility of a pulse action on the shutter 7 and the protection of technological equipment. The main disadvantage of the “classical” proportional-differential-integral controller (PID controller) is that the control algorithm can provide optimal control quality only with one mode of operation of the pipeline or a narrow range of modes of transportation of the pumped medium. With a significant change in the modes of transportation in the pipeline (productivity, viscosity of the pumped medium), as a rule, reconfiguration of such a PID controller is necessary. At the same time, the response of the SARD 1 should be changed in accordance with the current characteristics of the pipeline and the current settings of the SARD, which minimizes overshoot and reduces the time of the transition process.

The advantage of the claimed method for setting up the SARD is the ability to work in a wide range of operating modes of the main oil pipeline without "manual" reconfiguration of the regulation parameters. In general terms, the algorithm for regulating the pressure in the pipeline does not differ from that traditionally used in the PID controller:

- in each control cycle, the current value of the control parameter is compared with the setpoint for input and output pressure. As a result, an error signal is generated;

- the magnitude of the error signal proportionally determines the speed of the damper, and the sign of the error signal determines the direction of movement (P-regulation). The value of the error signal is adjusted depending on the rate of change of the adjustable parameter (D-regulation).

The difference between the SARD tuning process used in the claimed invention and the tuning of the “classical” PID controller is that after calculating the effect by the P and D regulation coefficients (in the classical way), the PD controller is constantly limited by external factors according to the following criteria:

a) the asymmetry of regulation: the closing and opening of the control damper 7 is carried out on different sets of proportional-differential (TTD) coefficients, in addition, the dead zones of the regulators are also asymmetrical;

b) compensation for non-linearity: depending on the differential pressure on the control damper 7, a dynamic change in the coefficients of the PD regulator is made;

c) the pulse mechanism of action on the control damper 7: if there is no change in pressure to eliminate the static mismatch between the set point and the current pressure value, instead of the integral link in the "classic" PID controller, the pulse action on the control damper 7 is turned on. This mode allows you to reduce the influence of the inertia of the system and reduce the sensitivity of the regulator to small pressure waves;

d) the use of separate incremental PD-regulators with the dominance of the process of closing the damper before and after the regulator to ensure simultaneous regulation of pressure in the pipeline. The presence of two regulators allows for a smooth transition of regulation from one pressure to another if necessary;

e) closing the actuators with the regulator at maximum speed when certain controlled pressures are reached to implement the protection functions of the equipment, if this does not lead to other dangerous consequences, such as exceeding the maximum pressure in the manifold, pressure drop across the damper, reaching extreme positions of the actuator 8 of the damper.

The asymmetry of regulation of the shutter closure is provided by taking into account a number of SARD settings:

1) if necessary, close (open) the shutter, i.e. with a positive (negative) control error, a closing (opening) zone at the input is used - coefficient of the pressure regulator at the input of MHC 2, the inverse value of the proportionality coefficient of the controller. The larger the closing (opening) zone, the greater the control error is required to achieve maximum shutter speed. Separate opening / closing zones are used so that the shutter closes quickly, but slowly opens. This reduces the risk of self-oscillations of the regulator and allows, on the one hand, to quickly prevent a pressure drop at the input of the MHC 2, on the other hand, to smoothly go to the set point from above (i.e., lower the pressure to the set point). Therefore, the opening zone of the regulator is always larger than the closing zone.

2) to prevent constant “adjustment” of the damper when the pressure at the inlet of the MHC 2 approaches the setpoint from above (below), a deadband is used above (below) the inlet setpoint, which sets the pressure interval at the inlet of MHC 2, in which PD regulation of the regulator does not work pressure at the input of MHC 2. Typically, this setpoint is zero or very small for the regulator to maintain a pressure not lower than the setpoint.

3) to reduce the likelihood of damage to valves and limit switches, a speed limit zone is used when opening (closing) the shutter less than (more) the specified percentage of closure, the speed of the shutter is forcibly limited to the specified value.

Compensation of the nonlinearity of pressure changes when changing the degree of shutter closure is provided by the following SARD settings:

1) to calculate the damping coefficient by the percentage of shutter closure, the maximum and minimum positions for the shutter speed coefficient are used. In automatic pressure mode, a maximally closed damper is used. The coefficient of the maximum speed of opening the damper limits the maximum speed of opening the damper in automatic pressure modes.

2) if there is information about the number of operating MNA 4, zone coefficients for MNA are used — damping coefficients for different numbers of operating MNA 4. The larger the coefficient, the slower the response of the regulator to the pressure deviation from the set point. In the absence of information, a coefficient of 1.0 is applied.

3) the input integration zone sets the minimum control error, below which the pulse control of the damper is disabled, because the integral link of the regulator is disconnected.

4) when calculating the regulatory effect, the position sensor is corrected by the damping coefficient based on the percentage of shutter closure. The value of the pre-calculated setting of the shutter speed is multiplied by the position damping coefficient.

5) when the maximum pressure in the manifold of the MHF 2 is exceeded, a correction is made for the pressure in the manifold - the setting of the speed of the valves is allowed to decrease.

6) the position control zone is the coefficient of the PD-regulator of the position of the damper. This is the inverse value of the proportionality coefficient of the controller, the larger the control zone, the greater the control error is required to achieve maximum shutter speed.

7) to prevent constant “adjustment” of the damper when approaching the setpoint, a “dead zone” of position is used, which sets the interval of the position of the damper in which P-position control does not work.

8) to reduce the throttle zone in order to increase the speed of the regulator, the minimum damper position during regulation is used - the minimum percentage of damper closure during pressure regulation.

9) to prevent the complete closure of the control damper 8, the maximum position of the damper during regulation is used - the maximum percentage of closure of the damper during pressure control.

10) to reduce the likelihood of damage to valves and limit switches, a speed limit zone is used when opening (closing), in which when the valve is opened (closed) less than (more) a certain percentage of opening (closing), the speed of the valve is forcibly limited.

The possibility of impulse action on the damper in the absence of a pressure change to eliminate the static mismatch between the set point and the current pressure value is provided by taking into account the following parameters:

1) pressure integration impulse - the value of setting the speed of the damper during operation of the integral part of the regulator. In the presence of a static error (mismatch) and the absence of a change in pressure at the output of the regulator, pulses of a fixed duration and amplitude are periodically generated. This allows you to more accurately keep the preset pressure setting, eliminating the influence of the inertia of the system on the regulation process.

2) the duration of the pressure integration pulse is the duration of the output action during the operation of the integral part of the regulator.

3) for the formation of a pulse effect on the damper in the dead zone of the main PD-regulator of the input pressure, an input integration coefficient is used. The larger the coefficient, the faster the error accumulates and the pulses often follow.

The use of separate incremental PD controllers with the dominance of the shutter closure process before and after the regulator to ensure simultaneous regulation of pressure in the pipeline is ensured by a protective input pressure setting - the minimum pressure during inlet control. At a pressure at the input of MHC 2 below this setpoint, the pressure regulator is disconnected from the control of the damper, to which the maximum closing speed signal is supplied. Exceptions are the excess of the maximum pressure in the manifold, the maximum differential and a malfunction of one of the pressure sensors. This parameter is used to enable “soft” adjustment of the pressure regulator, aimed at the absence of overshoot and self-oscillations in normal operation. At the same time, the protective setting allows you to reduce the likelihood of a pressure drop below the minimum limit, if the main regulator could not do this. The value of this setting should be selected in the range between the working and maximum minimum inlet pressure settings.

Parameters ensuring the protection of technological equipment when certain pressure values of the pumped medium in the pipeline are reached:

1) manifold pressure to limit the shutter speed.

2) limiting the maximum speed of the damper when approaching the limit switches. When a certain pressure is reached in the manifold of the MHF, the shutter speed in all control modes from the controller is limited to the value "Limit shutter speed at high collector pressure, set in"% of the maximum speed ". The restriction applies only to closing the damper. If the required speed is lower than the specified parameter, the speed limit is not performed.

The claimed device settings SARD, implements the claimed method of setting SARD, works as follows.

At the first stage - the data collection stage, data are entered into the passport data storage unit 14 of the main pipeline for pumping petroleum products on the minimum working pressure at the inlet of the NPS 3, the admissible working pressure at the outlet of the NPS 3, the maximum allowable pressure in the manifold, the maximum allowable pressure drop across the damper 8, the movement time of the shutter 8 between the extreme positions with the maximum possible speed and the duration of the SARD regulation cycle.

Then, the initial SARD settings are selected, which include the coefficients of the incremental proportional-differential controller (PD-regulator), as well as parameters that take into account the asymmetry of the regulation of shutter closure, the nonlinearity of pressure change when changing the degree of shutter closure, the possibility of a pulse action on the shutter in the absence of a change in pressure to eliminate the static mismatch between the set point and the current pressure value, and the parameters providing technological protection equipment upon reaching certain pressure values of the pumped medium in the pipeline.

After that connect the PTC 13 settings SARD to the system of automatic control of pressure 1 of the pumped medium in the pipeline. PTK 13 has measurement channels that are electrically connected (in parallel) to the same sensors through which the SARD 1 is measured.

During operation of the SARD 1 (control process) using the LGraph2 software, the PTK 13 measures physical quantities (the same as the SARD): the degree of shutter closure, the pressure of the pumped medium in the pipeline before and after the shutter 8, and the pressure change from the start of observations before establishing a constant pressure in the pipeline before and after the shutter 8. A data volume is called, which is called the "experiment". Then there is a recording and archiving of the measured physical quantities in the storage unit of the experimental data 15.

It is extremely important to highlight the transient changes in the pressure of the pumped medium in the pipeline. Transient areas are identified by visual analysis of changes in physical quantities in the transient isolation unit 16, the pressure changes in such areas are measured, and the measured data of the transient areas are stored as a “section” in the transient data storage unit 17. The more transient will be collected, the more objective will be the result of analysis and calculations.

At the second stage, the data processing stage, 18 “sections” of data (transients in the main pipeline for pumping oil products) and data from the passport data storage unit 14 of the pipeline system are loaded into the data comparison unit 18. Then, using the SARD software in MATLAB, the measured data of the transient sections in the pipeline are compared for the initial settings of the SARD with the established requirements for the pipeline operation.

If for all selected transients the regulatory criteria satisfy the requirements of the technical documentation, then SARD 1 is considered configured.

If the experimental data on transients do not meet the requirements of the technical documentation, they decide on the need for a second cycle of tuning the SARD.

The data from the passport data storage unit 14 of the pipeline system, the experimental data storage unit 15 and the transient storage unit 17, initial SARD settings are transmitted to the data processing unit 19.

SARD software calculates and displays the values of the recommended settings for the proportional, differential and integral components of the SARD, as well as the recommended parameters that take into account the asymmetry of regulation of the shutter closure, non-linearity of pressure change when changing the degree of shutter closure, the possibility of a pulse action on the shutter in the absence of pressure change to eliminate the static mismatch between the set point and the current pressure value, and parameters, providing protecting the technological equipment when certain pressure values of the pumped medium are reached in the main pipeline for pumping oil products.

At the third stage - the stage of data verification, the recommended values of the settings are entered into the PLC 5 SARD and PTK 13 settings SARD. They start a repeated cycle of setting the SARD. The SARD setting cycle includes the following operations: abrupt change in the SARD settings for input and output pressure; stop and start MNA 4 at the previous and next downstream pumped liquid NPS 3; evaluation of transient schedules in the pipeline. Repeat steps 1 and 2 until the settings are found at which the SARD control process will satisfy the requirements of the technical documentation for the operation of the main pipeline for pumping oil products.

As a result, it is possible to automate the SARD setting process, and in addition, the accuracy and speed of regulating the pressure of the pumped medium in the main pipeline for pumping oil products are increased.

Claims (2)

1. A device for tuning the automatic pressure control system (SARD) in the main pipeline for pumping petroleum products, containing:
- the software and hardware complex (PTC) of the SARD settings for determining the values of the SARD settings and verifying the compliance of the SARD settings with the established requirements for operating the pipeline
- while PTC contains means for connecting to the SARD, containing a programmable logic controller (PLC), a frequency converter (IF) and a damper electric drive, consisting of a motor, gearbox and electric drive control unit, configured to control the degree of shutter closure, while the SARD is made with the possibility of applying a control signal to the electric damper to control the degree of its closure, which determines the pressure value of the pumped oil products in the main pipeline,
- while SARD and PTK have the means to measure the degree of closure of the valve and the pressure values of the pumped oil products in the main pipeline before and after the valve,
- in this case, the PTC is configured to adjust the coefficients of the incremental proportional-differential controller (PD-regulator), as well as parameters that take into account the asymmetry of regulation of the shutter closure, the non-linearity of the pressure change when changing the degree of shutter closure, the pulse action on the shutter in the absence of a change in pressure to eliminate static the mismatch between the set point and the current pressure value,
- wherein the PTC contains:
- a storage unit for passport data of the main pipeline, configured to record passport data of the main pipeline that meets the established requirements for its operation,
- an experimental data storage unit, configured to record measured data on the degree of shutter closure, pressure values of the pumped oil products in the main pipeline before and after the shutter, and data on pressure changes from the start of observations to establishing a constant pressure in the main pipeline before and after the shutter,
- block allocation of transients in the main pipeline, which determines the areas of transient changes in the pressure of the pumped oil products in the main pipeline,
- a transient data storage unit, configured to record the measured data of the transient sections,
- a comparison unit, configured to receive data from a transient storage unit and a passport data storage unit, comparing the measured data of transient sections in the main pipeline for the initial settings of the SARD with the established requirements for the operation of the main pipeline and deciding whether to re-run SARD tuning cycle in case the experimental data do not meet established operational requirements ation of the main pipeline,
- a data processing unit configured to receive data from a storage pipe passport data storage unit, experimental data storage unit and transient data storage unit, obtain initial SARD settings, process the received data and generate recommended SARD settings,
- at the same time, the SARD PLC and the SARD configuration PTK contains means for obtaining the recommended SARD settings and starting a repeated SARD settings cycle to find the SARD settings that meet the established requirements for the operation of the pipeline. 2. The method of tuning the system of automatic pressure control in the main pipeline for pumping petroleum products using the device according to p. 1, characterized by the stage of data collection, in which:
- enter into the storage unit of passport data of the main pipeline the passport data of the main pipeline corresponding to the established requirements for its operation,
- choose the initial settings for the SARD, including the coefficients of the incremental proportional-differential controller, as well as parameters that take into account the asymmetry of regulation of the shutter closure, the non-linearity of the pressure change when the degree of shutter closure is changed, the pulse action on the shutter when there is no change in pressure to eliminate the static mismatch between the setpoint and current pressure value,
- connect the software and hardware complex (PTK) settings SARD to SARD,
- measure the degree of shutter closure, the pressure of the pumped oil products in the main pipeline before and after the shutter during the operation of the SARD, then the measured degree of closure of the shutter, the pressure of the pumped oil products in the main pipeline before and after the shutter and data on the pressure change from the beginning of observations to the establishment of a constant the pressure in the main pipeline before and after the shutter is recorded in the experimental data storage unit, after which the areas of transitional percent ssov change pumped oil pressure in the main conduit and the measured values of pressure changes in such areas in the block allocation transients in the pipeline, and recording the measured data plots of transients in the data storage unit transients
- spend the data processing stage, on which:
- transmit data to the data comparison unit from the transient data storage unit and the passport data passport data storage unit, compare the measured data of the transient sections in the main pipeline for the initial settings of the SARD with the established requirements for its operation, and then decide on the need for a second cycle SARD settings in case of inconsistency of experimental data with the established requirements for the operation of the main pipeline ,
- transmit data to the data processing unit from the storage pipeline passport data storage unit, experimental data storage unit and transient data storage unit, initial SARD settings, process the received data and generate recommended SARD settings,
- and carry out the data verification step, at which:
transfer the recommended SARD settings to the SARD and PTC SARD settings PLCs and start a repeated SARD settings cycle to find the SARD settings to meet the established requirements for the operation of the main pipeline.

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