CN214196654U - Special closed-loop control system for submersible screw pump based on trial pumping algorithm - Google Patents
Special closed-loop control system for submersible screw pump based on trial pumping algorithm Download PDFInfo
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- CN214196654U CN214196654U CN202023275206.5U CN202023275206U CN214196654U CN 214196654 U CN214196654 U CN 214196654U CN 202023275206 U CN202023275206 U CN 202023275206U CN 214196654 U CN214196654 U CN 214196654U
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Abstract
The utility model provides a special closed-loop control system of latent oil screw pump based on trying to draw algorithm, including data acquisition unit, sensor, frequency conversion control unit, teletransmission unit, backstage control and display element, unit, sensor, data acquisition unit connect gradually, data acquisition unit passes through frequency conversion control unit and unit connection, data acquisition unit still is connected with display element and teletransmission unit, teletransmission unit is connected with the backstage control, the backstage control is connected with data acquisition unit. The utility model discloses the time of the degree of sinking and reaching the target degree of sinking when having shortened oily screw pump start of diving can make the degree of sinking reach the target degree of sinking fast.
Description
Technical Field
The utility model relates to an oil-submersible screw pump technical field, concretely relates to oil-submersible screw pump special closed-loop control system based on trying to draw algorithm.
Background
The prior submersible screw pump is suitable for discharging viscous liquid and solid-phase-containing liquid, and has uniform and stable flow, thereby being widely applied. However, the screw pump is difficult to start, and the long time for reaching the target submergence degree also reduces the utilization rate of the submersible screw pump.
With the continuous development of oil fields, the sinking degree of an oil well becomes an important parameter of the oil field for controlling the liquid level of the oil well. It is also important to quickly bring the submergence to the target submergence. The rapid stabilization of the submergence can avoid unnecessary problems such as equipment damage, theft and stop and the like, so that the oil well can normally run. Therefore, a closed-loop control model special for a screw pump is needed to rapidly stabilize the submergence degree and enable the submergence degree to rapidly reach a target value.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a special closed-loop control system of latent oil screw pump based on trying to draw algorithm has shortened the submergence degree when latent oil screw pump starts and has reached the time of target submergence degree, can make the submergence degree reach the target submergence degree fast.
For solving the technical problem, the utility model provides a special closed-loop control system of latent oil screw pump based on trying to draw algorithm, including data acquisition unit, sensor, frequency conversion control unit, teletransmission unit, backstage control and display element, unit, sensor, data acquisition unit connect gradually, data acquisition unit passes through frequency conversion control unit and unit connection, data acquisition unit still is connected with display element and teletransmission unit, teletransmission unit is connected with the backstage control, the backstage control is connected with data acquisition unit.
Furthermore, the sensor includes a voltage sensor, a current sensor, a temperature sensor and a rotating speed monitoring module for monitoring the unit, a flow transmitter for monitoring the pipeline flow and a pressure sensor for monitoring the casing pressure and the back pressure.
Further, the data acquisition unit comprises a control module, and the control module comprises a GSM8594 integrated block and a KE02 digital signal processor.
Furthermore, the remote transmission unit is composed of a GPRS module, and data processed by the data acquisition unit is transmitted to the background for monitoring by the remote transmission unit.
According to the special closed-loop control method for the submersible screw pump based on the trial pumping algorithm, firstly, the actual submergence degree and the target submergence degree are compared, and when the target submergence degree is smaller than the actual submergence degree, the rotating speed of a motor is increased; and when the target submergence degree is larger than the actual submergence degree, reducing the rotating speed of the motor, changing the current rotating speed of the motor, and finally outputting the rotating speed.
Furthermore, a single-order closed loop control mode and a double-order closed loop control mode are adopted, and after each PID regulation period is finished, the required motor rotating speed is calculated through detected submergence, motor temperature, output rotating speed, pressure, voltage, current and flow operation parameters and combination of closed-loop control setting parameters.
Furthermore, when single-order closed-loop control is adopted, the rotating speed is finely adjusted by the difference value of the submergence degree and the target submergence degree through an incremental algorithm after the system is started, and then the running rotating speed is controlled.
Further, the incremental algorithm u = | M1-M2| × k,
adjusting the rotating speed: u, unit revolutions per minute,
target submergence: m1, the unit of meters,
actual submergence: m2, the unit of meters,
the regulation factor is as follows: k, proportional relationship of the deflection value of the submergence degree and the increasing rotating speed.
Further, when the double-order closed-loop control is adopted, the running rotating speed of the motor is adjusted by using an incremental algorithm and a trial-and-error algorithm;
when the difference value between the actual submergence degree and the target submergence degree is larger than 10 meters, calculating the rotating speed of the motor corresponding to the liquid supply amount by using a trial pumping algorithm and adjusting the rotating speed;
and when the difference value between the actual submergence degree and the target submergence degree is less than 10 meters, adjusting the running rotating speed of the motor by using an incremental algorithm.
Further, a trial pumping algorithm is adopted to calculate the rotating speed N of the motor matched with the current oil well liquid supply amount1The assumption is as follows:
suppose pump displacement Q1Speed N of screw pump2Proportional ratio, Q1=K1×N2X T, T is time, K1Is a coefficient of displacement of the pump,
assuming that the oil well liquid supply amount is stable in a short time; when the rotation speed of the pump is N1The oil well liquid supply quantity is equal to the discharge capacity of the pump:
Q2＝Q1＝K1×N1×T
when the height value is higher than the set target submergence by a certain height value, the height value is set to be 10 meters, and the set PID highest rotating speed N is used3Running and recording the time T for the submergence to drop by 10 meters1And calculating the liquid amount which is decreased by 10 meters:
V1＝Q3 – Q4＝(K1×N3×T1)-( K1×N1×T1)
when the rotating speed is 10 meters below the set target submergence, the set PID minimum rotating speed N is adopted4Running and recording the time T for the submergence to rise by 10 meters2And calculating the liquid amount which rises by 10 meters:
V2＝Q5-Q6＝(K1×N1×T2)－(K1×N4×T2)
the following steps can be achieved:
the capacity of the sleeve pipe is decreased by 10 meters, namely the capacity of the sleeve pipe is increased by 10 meters
V1＝V2
Q3-Q4＝Q5-Q6
(K1×N3×T1)-(K1×N1×T1)＝(K1×N1×T2)-(K1×N4×T2)
N1=((N3×T1)+(N4×T2))/(T1+T2)
N3: the high rotating speed value is set to be high,
T1: the time taken for the submergence to drop by 10 meters,
N4: the rotating speed value is low, and the rotating speed value is low,
T2: the time taken for the submergence to rise by 10 meters,
N1: the corresponding motor rotating speed is balanced for mining,
V1: the amount of liquid required to reduce the submergence when the current submergence is higher than the target submergence,
V2: the amount of liquid for raising the submergence is required when the current submergence is lower than the target submergence,
Q3: a discharge capacity at a high rotation speed when the degree of submergence is higher than a target value,
Q4: the liquid discharge amount at the current rotation speed when the submergence degree is higher than the target value,
Q6: the liquid discharge amount at the lowest rotation speed when the submergence degree is lower than the target value,
Q5: and discharging liquid at the current rotating speed when the submergence degree is lower than the target value.
The utility model discloses an above-mentioned technical scheme's beneficial effect as follows:
the control system takes the data acquisition unit as a main control system, processes information by acquiring the conditions of the unit through the sensor, and sends the processed information to the background monitoring system and the variable frequency control unit. The frequency conversion control unit performs closed-loop operation on the unit through the frequency converter, and then the unit feeds back the operated condition to the sensor to form closed-loop operation.
The main control algorithm consists of a calculation method and closed-loop processing, wherein the calculation method consists of an incremental algorithm and a trial extraction algorithm, and the closed-loop processing consists of single-order closed-loop processing and double-order closed-loop processing. The utility model discloses the time of the degree of sinking and reaching the target degree of sinking when having shortened oily screw pump start of diving can make the degree of sinking reach the target degree of sinking fast.
The closed-loop regulation adopted by the conventional submersible screw pump is to slowly reduce the submergence degree to enable the submergence degree to reach a target value, the special closed-loop control model firstly uses the maximum rotating speed to rapidly reduce the submergence degree, and then adjusts the rotating speed to enable the submergence degree to slowly reduce to reach the target submergence degree after the target submergence degree is reached. Compared with the conventional closed-loop regulation of the submersible screw pump, the special closed-loop control model has the following advantages: 1) the reaction speed is high, and the rotating speed of the motor can be quickly adjusted according to the target submergence degree to reach the target submergence degree in the shortest time. 2) The special closed-loop control model can quickly stabilize the liquid level when the oil well submergence degree is greatly floated.
Drawings
FIG. 1 is a system structure diagram of the control system of the present invention;
FIG. 2 is an incremental algorithm diagram of the present invention;
FIG. 3 is a single-order closed-loop control diagram of the present invention;
fig. 4 is a dual-order closed-loop control diagram of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 4 of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived from the description of the embodiments of the present invention by a person skilled in the art, are within the scope of the present invention.
Example one
The embodiment provides a special closed-loop control system of latent oil screw pump based on trying to draw algorithm, including data acquisition unit, sensor, frequency conversion control unit, teletransmission unit, backstage control and display element, unit, sensor, data acquisition unit connect gradually, data acquisition unit passes through frequency conversion control unit and unit connection, data acquisition unit still is connected with display element and teletransmission unit, teletransmission unit is connected with the backstage control, the backstage control is connected with data acquisition unit.
The system transmits information acquired by the sensor to the data acquisition unit for data processing, and after the data acquisition unit processes the information, the processed information is sent to the frequency converter and the remote transmission unit. The frequency converter receives the information of the data acquisition unit and then correspondingly controls the unit, and the remote transmission unit receives the information of the data acquisition unit and then remotely transmits the information to the monitoring background for real-time monitoring.
The sensor comprises a voltage sensor, a current sensor, a temperature sensor and a rotating speed monitoring module for monitoring the unit, a flow transmitter for monitoring the pipeline flow and a pressure sensor for monitoring the casing pressure and the back pressure.
The data acquisition unit comprises a control module, and the control module comprises a GSM8594 integrated block and a KE02 digital signal processor.
The remote transmission unit is composed of a GPRS module, and data processed by the data acquisition unit is transmitted to the background for monitoring by the remote transmission unit.
The master control algorithm resides in the data acquisition unit. The sensor transmits the underground condition to the data acquisition unit in a digital quantity mode by acquiring signals such as voltage, current, temperature and the like of the underground motor, and the GSM8594 integrated block of the data acquisition unit processes information and summarizes the information to the master control algorithm of the integrated block. The main control algorithm feeds back the processed information to the frequency converter and the remote transmission unit, the frequency converter adjusts the running state of the unit through the processed information, and the remote transmission unit remotely transmits the information to the background monitoring software through the GPRS module. The main control algorithm of the data acquisition unit is divided into a calculation method and closed-loop processing, the calculation method is divided into an increment algorithm and a trial extraction algorithm, and the closed-loop processing is divided into a single-order closed loop and a double-order closed loop.
Example two
The embodiment provides a special closed-loop control method for a submersible screw pump based on a trial pumping algorithm, which comprises the steps of firstly, comparing the actual submergence degree with the target submergence degree, and when the target submergence degree is smaller than the actual submergence degree, increasing the rotating speed of a motor; and when the target submergence degree is larger than the actual submergence degree, reducing the rotating speed of the motor, changing the current rotating speed of the motor, and finally outputting the rotating speed.
And (3) adopting two control modes of a single-order closed loop and a double-order closed loop, and calculating the required motor rotating speed by combining the detected sinkage, motor temperature, output rotating speed, pressure, voltage, current and flow operation parameters with closed-loop control setting parameters after each PID (proportion integration differentiation) regulation period is finished.
When single-order closed-loop control is adopted, the rotating speed is finely adjusted by the difference value of the submergence degree and the target submergence degree through an incremental algorithm after the system is started, and then the running rotating speed is controlled.
The incremental algorithm u = | M1-M2| × k,
adjusting the rotating speed: u, unit revolutions per minute,
target submergence: m1, the unit of meters,
actual submergence: m2, the unit of meters,
the regulation factor is as follows: k, proportional relationship of the deflection value of the submergence degree and the increasing rotating speed.
When the double-order closed-loop control is adopted, the operation rotating speed of the motor is adjusted by using an incremental algorithm and a trial-draw algorithm;
when the difference value between the actual submergence degree and the target submergence degree is larger than 10 meters, calculating the rotating speed of the motor corresponding to the liquid supply amount by using a trial pumping algorithm and adjusting the rotating speed;
and when the difference value between the actual submergence degree and the target submergence degree is less than 10 meters, adjusting the running rotating speed of the motor by using an incremental algorithm.
Using a trial pumping algorithm to calculate a value matching the current oil well fluid supplyMotor speed N1The assumption is as follows:
suppose pump displacement Q1Speed N of screw pump2Proportional ratio, Q1=K1×N2X T, T is time, K1Is a coefficient of displacement of the pump,
assuming that the oil well liquid supply amount is stable in a short time; when the rotation speed of the pump is N1The oil well liquid supply quantity is equal to the discharge capacity of the pump:
Q2＝Q1＝K1×N1×T
when the height value is higher than the set target submergence by a certain height value, the height value is set to be 10 meters, and the set PID highest rotating speed N is used3Running and recording the time T for the submergence to drop by 10 meters1And calculating the liquid amount which is decreased by 10 meters:
V1＝Q3 – Q4＝(K1×N3×T1)-( K1×N1×T1)
when the rotating speed is 10 meters below the set target submergence, the set PID minimum rotating speed N is adopted4Running and recording the time T for the submergence to rise by 10 meters2And calculating the liquid amount which rises by 10 meters:
V2＝Q5-Q6＝(K1×N1×T2)－(K1×N4×T2)
the following steps can be achieved:
the capacity of the sleeve pipe is decreased by 10 meters, namely the capacity of the sleeve pipe is increased by 10 meters
V1＝V2
Q3-Q4＝Q5-Q6
(K1×N3×T1)-(K1×N1×T1)＝(K1×N1×T2)-(K1×N4×T2)
N1=((N3×T1)+(N4×T2))/(T1+T2)
N3: the high rotating speed value is set to be high,
T1: the time taken for the submergence to drop by 10 meters,
N4: the rotating speed value is low, and the rotating speed value is low,
T2: the time taken for the submergence to rise by 10 meters,
N1: the corresponding motor rotating speed is balanced for mining,
V1: the amount of liquid required to reduce the submergence when the current submergence is higher than the target submergence,
V2: the amount of liquid for raising the submergence is required when the current submergence is lower than the target submergence,
Q3: a discharge capacity at a high rotation speed when the degree of submergence is higher than a target value,
Q4: the liquid discharge amount at the current rotation speed when the submergence degree is higher than the target value,
Q6: the liquid discharge amount at the lowest rotation speed when the submergence degree is lower than the target value,
Q5: and discharging liquid at the current rotating speed when the submergence degree is lower than the target value.
In the present invention, unless otherwise explicitly specified or limited, for example, it may be fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. The utility model provides a special closed-loop control system of latent oil screw pump based on try to take out algorithm which characterized in that: including data acquisition unit, sensor, frequency conversion control unit, teletransmission unit, backstage control and display element, unit, sensor, data acquisition unit connect gradually, the data acquisition unit passes through frequency conversion control unit and unit connection, the data acquisition unit still is connected with display element and teletransmission unit, the teletransmission unit is connected with the backstage control, the backstage control is connected with the data acquisition unit.
2. The submersible screw pump dedicated closed-loop control system based on the trial pumping algorithm of claim 1, characterized in that: the sensor comprises a voltage sensor, a current sensor, a temperature sensor and a rotating speed monitoring module for monitoring the unit, a flow transmitter for monitoring the pipeline flow and a pressure sensor for monitoring the casing pressure and the back pressure.
3. The submersible screw pump dedicated closed-loop control system based on the trial pumping algorithm of claim 2, characterized in that: the data acquisition unit comprises a control module, and the control module comprises a GSM8594 integrated block and a KE02 digital signal processor.
4. The submersible screw pump dedicated closed-loop control system based on the trial pumping algorithm of claim 3, characterized in that: the remote transmission unit is composed of a GPRS module, and data processed by the data acquisition unit is transmitted to the background for monitoring by the remote transmission unit.
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Special closed-loop control system of submersible screw pump based on trial pumping algorithm Effective date of registration: 20220304 Granted publication date: 20210914 Pledgee: Xinxiang Sanxing Petroleum Technology Co.,Ltd. Pledgor: XINXIANG CITY XIAFENG ELECTRICAL APPLIANCES Co.,Ltd. Registration number: Y2022980002198 |
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