Self-starting equipment, self-starting control method, self-starting control device and storage medium

Abstract

The invention relates to a self-starting device, a self-starting control method, a self-starting control device and a storage medium, the self-starting device is used for controlling an oil pumping unit to perform self-starting, the oil pumping unit comprises a motor, a frequency converter and a power supply component, and the self-starting device comprises a communication part, the communication part can obtain motor current parameters of the motor, frequency converter operation parameters of the frequency converter and power supply voltage parameters of the power supply part; the execution assembly is used for being connected with a frequency converter; the control part is connected with the communication part and the execution assembly, and the control part can determine whether the oil pumping unit is in an interference electricity state or not according to the motor current parameters, the frequency converter operation parameters and the power supply voltage parameters; on the basis that the oil pumping unit is in the voltage sag state, the control part can determine whether the oil pumping unit is in a self-starting state or not according to motor current parameters, frequency converter operation parameters and power supply voltage parameters; on the basis that the oil pumping unit is in the self-starting state, the control part controls the execution assembly to work, and the execution assembly controls the frequency converter to operate, so that the oil pumping unit is self-started.

Description

Technical Field

[0001] The present invention relates to the technical field of pumping units, and particularly relates to a self-starting device, a self-starting control method, a self-starting control device, and a storage medium. Background Art

[0002] The existing self-starting device used in pumping units applies a contactor time relay relying on electrical reflux, and through electrical interlocking, a power-off delay start method. This start method belongs to a mechanical interlocking method, and it cannot realize the monitoring of electrical loss and power parameter monitoring and the judgment of power supply interruption, and cannot accurately perform self-starting control on the pumping unit when power supply interruption occurs. Summary of the Invention

[0003] In view of this, the present invention provides a self-starting device.

[0004] Specifically, the present invention is realized through the following technical solutions:

[0005] According to a first aspect of the present invention, there is provided a self-starting device for controlling a pumping unit to perform self-starting. The pumping unit includes a motor, an inverter, and a power supply component. The self-starting device includes: a communication unit for connecting to the motor, the inverter, and the power supply component, and the communication unit can obtain the motor current parameter of the motor, the inverter operation parameter of the inverter, and the power supply voltage parameter of the power supply component; an execution component for connecting to the inverter; a control unit respectively connected to the communication unit and the execution component. The communication unit can send the motor current parameter, the inverter operation parameter, and the power supply voltage parameter to the control unit. The control unit can determine whether the pumping unit is in a power supply interruption state according to the motor current parameter, the inverter operation parameter, and the power supply voltage parameter; based on the pumping unit being in a power supply interruption state, the control unit can further determine whether the pumping unit is in a self-startable state according to the motor current parameter, the inverter operation parameter, and the power supply voltage parameter; based on the pumping unit being in a self-startable state, the control unit controls the execution component to work, and the execution component controls the inverter to operate, so that the inverter controls the motor to work, so as to make the pumping unit self-start.

[0006] The present invention provides a self-starting device. The self-starting device is used to control a pumping unit to perform self-starting. The pumping unit includes a motor, an inverter, and a power supply component. The motor is a driving component of the pumping unit and can be used to drive the body of the pumping unit to perform pumping operations. The inverter is connected to the motor and is used to control the motor to work. The power supply component is connected to the inverter and is used to provide electrical energy to the driving component through the inverter.

[0007] The self-starting device includes a communication unit, an execution component, and a control unit. The communication unit is used to connect to the motor, the inverter, and the power supply component. After the connection, the communication unit can obtain the motor current parameter of the motor, the inverter operation parameter of the inverter, and the power supply voltage parameter of the power supply component.

[0008] An execution component, which is used to connect to a frequency converter. The execution component can control the operation of the frequency converter, causing the frequency converter to change the output frequency, and further causing the motor to operate at different frequencies.

[0009] The control part is respectively connected to the communication part and the execution component. The communication part can send motor current parameters, frequency converter operation parameters, and power supply voltage parameters to the control part. The control part can determine whether the pumping unit is in a power-sag state based on the motor current parameters, frequency converter operation parameters, and power supply voltage parameters. Specifically, the control part has built-in power-sag conditions, and the power-sag conditions include the ranges that the motor current parameters, frequency converter operation parameters, and power supply voltage parameters will be in when the pumping unit is in a power-sag state. By comparing the above parameters with the power-sag conditions one by one, when the motor current parameters, frequency converter operation parameters, and power supply voltage parameters all meet the power-sag conditions, the control part can determine that the pumping unit is in a power-sag state.

[0010] Based on the pumping unit being in a power-sag state, the control part can also determine whether the pumping unit is in a self-startable state according to the motor current parameters, frequency converter operation parameters, and power supply voltage parameters. Specifically, the control part has built-in self-start conditions, and the self-start conditions include the ranges that the motor current parameters, frequency converter operation parameters, and power supply voltage parameters will be in when the pumping unit is in a self-startable state. By comparing the above parameters with the self-start conditions one by one, when the motor current parameters, frequency converter operation parameters, and power supply voltage parameters all meet the self-start conditions, the control part can determine that the pumping unit is in a self-startable state.

[0011] When the pumping unit is in a self-startable state, the control part can control the execution component to work. The execution component controls the operation of the frequency converter of the pumping unit, so that the frequency converter controls the motor to work and the pumping unit self-starts.

[0012] The self-start device proposed by the present invention can achieve self-start in the case of having a frequency converter, can timely detect that the pumping unit is in a power-sag state, can automatically make the pumping unit self-start, and the present invention utilizes the comprehensive parameters during the operation of the power supply component, frequency converter, and motor, and can accurately judge whether the short-term voltage reduction is due to power-sag or power outage. If it is power-sag that causes the self-start of the pumping unit, it can ensure the safe operation of the pumping unit, reduce the labor intensity of employees, improve the operation efficiency of the pumping unit, and increase the continuous operation of the pumping unit.

[0013] In some technical solutions, the execution component includes: a first execution part, which is respectively connected to the control part and the frequency converter and is used to control the reset of the frequency converter; a second execution part, which is respectively connected to the control part and the frequency converter and is used to control the operation of the frequency converter.

[0014] In some technical solutions, the communication part includes: an input end, which is used to connect to the motor, the frequency converter, and the power supply component; an output end, which is connected to the control part.

[0015] In some technical solutions, the pumping unit includes a control cabinet, and the self-starting device is arranged inside the control cabinet.

[0016] According to the second aspect of the present invention, the present invention also provides a self-starting control method for controlling the self-start of a pumping unit. The pumping unit includes: a motor, an inverter, and a power supply component. The self-starting control method includes: obtaining the motor current parameter of the motor, the inverter operation parameter of the inverter, and the power supply voltage parameter of the power supply component; determining whether the pumping unit is in a power-sag state based on the motor current parameter, the inverter operation parameter, and the power supply voltage parameter; determining whether the pumping unit is in a self-startable state based on the pumping unit being in a power-sag state, according to the motor current parameter, the inverter operation parameter, and the power supply voltage parameter; and controlling the operation of the inverter based on the pumping unit being in a self-startable state, so that the inverter controls the motor to work, thereby enabling the pumping unit to self-start.

[0017] The self-starting control method proposed by the present invention is used to control the self-start of a pumping unit. The pumping unit includes a motor, an inverter, and a power supply component. The motor is the driving component of the pumping unit and can be used to drive the body of the pumping unit to perform oil pumping operations. The inverter is connected to the motor and is used to control the operation of the motor. The power supply component is connected to the inverter and is used to supply electrical energy to the driving component through the inverter.

[0018] The self-starting control method includes: First, obtaining the motor current parameter of the motor, the inverter operation parameter of the inverter, and the power supply voltage parameter of the power supply component.

[0019] After that, based on the motor current parameter, the inverter operation parameter, and the power supply voltage parameter, determine whether the pumping unit is in a power-sag state.

[0020] Based on the pumping unit being in a power-sag state, determine whether the pumping unit is in a self-startable state according to the motor current parameter, the inverter operation parameter, and the power supply voltage parameter.

[0021] Based on the pumping unit being in a self-startable state, control the power supply of the inverter, so that the inverter controls the motor to work, thereby enabling the pumping unit to self-start.

[0022] The self-starting device proposed by the present invention can achieve self-starting in the case of having an inverter, can timely detect that the pumping unit is in a power-sag state, can automatically make the pumping unit self-start, and the present invention utilizes the comprehensive parameters during the operation of the power supply component, the inverter, and the motor, and can accurately judge whether the short-term voltage drop is due to power-sag or power outage. If it is power-sag, the pumping unit will self-start, which can ensure the safe operation of the pumping unit, reduce the labor intensity of employees, improve the operation efficiency of the pumping unit, and increase the continuous operation of the pumping unit.

[0023] In some technical solutions, determining whether a pumping unit is in a power-sag state based on motor current parameters, frequency converter operation parameters, and power supply voltage parameters includes: comparing the motor current signal, frequency converter operation parameters, and power supply voltage parameters with the power-sag conditions; and determining that the pumping unit is in a power-sag state based on the fact that the motor current signal, frequency converter operation parameters, and power supply voltage parameters all meet the power-sag conditions.

[0024] In some technical solutions, determining whether a pumping unit is in a self-startable state according to motor current parameters, frequency converter operation parameters, and power supply voltage parameters includes: comparing the motor current signal, frequency converter operation parameters, and power supply voltage parameters with the self-start conditions; and determining that the pumping unit is in a self-startable state based on the fact that the motor current signal, frequency converter operation parameters, and power supply voltage parameters all meet the self-start conditions.

[0025] In some technical solutions, controlling the operation of the frequency converter to make the frequency converter control the motor to work so that the pumping unit self-starts specifically includes: controlling the frequency converter to reset; and after a first time period, controlling the frequency converter to operate so that the frequency converter controls the motor to work.

[0026] According to the third aspect of the present invention, there is provided a self-start control device for controlling a pumping unit to perform self-starting. The pumping unit includes: a motor, a frequency converter, and a power supply component. The self-start control device includes: an acquisition unit that acquires the motor current parameters of the motor, the frequency converter operation parameters of the frequency converter, and the power supply voltage parameters of the power supply component; a first processing unit for determining whether the pumping unit is in a power-sag state based on the motor current parameters, the frequency converter operation parameters, and the power supply voltage parameters; a second processing unit for determining whether the pumping unit is in a self-startable state according to the motor current parameters, the frequency converter operation parameters, and the power supply voltage parameters based on the fact that the pumping unit is in a power-sag state; and an execution unit for controlling the power supply of the frequency converter based on the fact that the pumping unit is in a self-startable state so that the frequency converter controls the motor to operate, thereby enabling the pumping unit to self-start.

[0027] The self-start control device proposed by the present invention is used to control a pumping unit to perform self-starting. The pumping unit includes a motor, a frequency converter, and a power supply component. The motor is a driving component of the pumping unit and can be used to drive the body of the pumping unit to perform pumping operations. The frequency converter is connected to the motor and is used to control the operation of the motor. The power supply component is connected to the frequency converter and is used to supply electrical energy to the driving component through the frequency converter.

[0028] The self-start control device includes an acquisition unit, a first processing unit, a second processing unit, and an execution unit. The acquisition unit is used to acquire the motor current parameters of the motor, the frequency converter operation parameters of the frequency converter, and the power supply voltage parameters of the power supply component.

[0029] The first processing unit is used to determine whether the pumping unit is in a power-sag state based on the motor current parameters, the frequency converter operation parameters, and the power supply voltage parameters.

[0030] The second processing unit is configured to determine whether the pumping unit is in a state where it can self-start based on the motor current parameter, the operating parameter of the frequency converter, and the power supply voltage parameter when the pumping unit is in a power-sag state.

[0031] The execution unit is configured to control the power supply of the frequency converter based on the pumping unit being in a state where it can self-start, so that the frequency converter controls the motor to operate, thereby enabling the pumping unit to self-start.

[0032] The self-starting device proposed by the present invention can achieve self-starting in the case of having a frequency converter, can timely detect that the pumping unit is in a power-sag state, can automatically make the pumping unit self-start, and the present invention utilizes the comprehensive parameters during the operation of the power supply component, the frequency converter, and the motor, and can accurately determine whether the short-term voltage drop is due to a power-sag or a power outage. If it is a power-sag, the pumping unit will self-start, which can ensure the safe operation of the pumping unit, reduce the labor intensity of employees, improve the operation efficiency of the pumping unit, and increase the continuous operation of the pumping unit.

[0033] According to a fourth aspect of the present invention, there is provided a storage medium having a computer program stored thereon, and when the program is executed by a processor, the steps of the self-start control method in the second aspect or any one of the technical solutions in the second aspect are implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present invention, and are used together with the specification to explain the principles of the present invention.

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0036] Figure 1 It is a schematic block diagram of a self-starting device applied to a pumping unit provided by an embodiment of the present invention;

[0037] Figure 2 It is a schematic block diagram of a self-starting device provided by an embodiment of the present invention;

[0038] Figure 3 It is one of the schematic flowcharts of a self-start control method provided by an embodiment of the present invention;

[0039] Figure 4 It is another schematic flowchart of a self-start control method provided by an embodiment of the present invention;

[0040] Figure 5 It is still another schematic flowchart of a self-start control method provided by an embodiment of the present invention;

[0041] Figure 6 It is the fourth flow diagram of a self-start control method provided by an embodiment of the present invention;

[0042] Figure 7 It is a structural diagram of a self-start control device provided by an embodiment of the present invention.

[0043] Among them, Figure 1 and Figure 2 the corresponding relationship between the reference numerals in the drawings and the component numbers is as follows:

[0044] 100 - self-start device, 110 - communication unit, 112 - input end, 114 - output end, 120 - execution component, 130 - control unit, 200 - motor, 210 - junction box, 220 - frequency converter, 230 - control cabinet, 240 - wire. Detailed implementation manners

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0046] As Figure 1 and Figure 2 shown, in an embodiment of the present invention, a self-start device 100 is provided for controlling a pumping unit to perform self-start. The pumping unit includes a motor 200, a frequency converter 220, and a power supply component. The self-start device 100 includes: a communication unit 110 for connecting to the motor 200, the frequency converter 220, and the power supply component. The communication unit 110 can obtain the motor current parameter of the motor 200, the frequency converter operation parameter of the frequency converter 220, and the power supply voltage parameter of the power supply component; an execution component 120 for connecting to the frequency converter 220; a control unit 130 respectively connected to the communication unit 110 and the execution unit. The communication unit 110 can send the motor current parameter, the frequency converter operation parameter, and the power supply voltage parameter to the control unit 130. The control unit 130 can determine whether the pumping unit is in a power-sag state according to the motor current parameter, the frequency converter operation parameter, and the power supply voltage parameter of the power supply component; based on the pumping unit being in a power-sag state, the control unit 130 can further determine whether the pumping unit is in a self-startable state according to the motor current parameter, the frequency converter operation parameter, and the power supply voltage parameter; based on the pumping unit being in a self-startable state, the control unit 130 controls the execution unit to work, and the execution unit controls the frequency converter 220 to be powered, so that the frequency converter 220 controls the motor 200 to work, so as to make the pumping unit self-start.

[0047] In this embodiment, the present invention proposes a self-starting device 100, which is used to control the pumping unit to start automatically. The pumping unit includes a motor 200, a frequency converter 220 and a power supply component. The motor 200 is the driving component of the pumping unit and can be used to drive the body of the pumping unit to perform oil pumping operations. The frequency converter 220 is connected to the motor 200 and is used to control the operation of the motor 200. The power supply component is connected to the frequency converter 220 and is used to supply electrical energy to the driving component through the frequency converter 220.

[0048] The self-starting device includes a communication unit 110, an execution component 120 and a control unit 130. The communication unit 110 is used to connect to the motor 200, the frequency converter 220 and the power supply component. After the connection, the communication unit 110 can obtain the motor current parameter of the motor 200, the operation parameter of the frequency converter 220 and the power supply voltage parameter of the power supply component.

[0049] The execution component 120 is used to connect to the frequency converter 220. The execution component 120 can control the operation of the frequency converter 220, so that the frequency converter 220 changes the output frequency, and further enables the motor 200 to work at different frequencies.

[0050] The control unit 130 is respectively connected to the communication unit 110 and the execution unit. The communication unit 110 can send the motor current parameter, the operation parameter of the frequency converter and the power supply voltage parameter to the control unit 130. The control unit 130 can determine whether the pumping unit is in a power-sag state according to the motor current parameter, the operation parameter of the frequency converter and the power supply voltage parameter.

[0051] Specifically, the control unit 130 has a power-sag condition built in, and the power-sag condition includes the ranges that the motor current parameter, the operation parameter of the frequency converter and the power supply voltage parameter will be in when the pumping unit is in a power-sag state. Compare the above parameters with the power-sag condition one by one. When the motor current parameter, the operation parameter of the frequency converter and the power supply voltage parameter all meet the power-sag condition, the control unit 130 can determine that the pumping unit is in a power-sag state.

[0052] Based on the fact that the pumping unit is in a power-sag state, the control unit 130 can also determine whether the pumping unit is in a state where it can start automatically according to the motor current parameter, the operation parameter of the frequency converter and the power supply voltage parameter. Specifically, the control unit 130 has a self-start condition built in, and the self-start condition includes the ranges that the motor current parameter, the operation parameter of the frequency converter and the power supply voltage parameter will be in when the pumping unit is in a state where it can start automatically. Compare the above parameters with the self-start condition one by one. When the motor current parameter, the operation parameter of the frequency converter and the power supply voltage parameter all meet the self-start condition, the control unit 130 can determine that the pumping unit is in a state where it can start automatically. The control unit 130 can control the execution component 120 to control the operation of the frequency converter 220 to complete the automatic start of the pumping unit.

[0053] The self-starting device 100 proposed by the present invention can achieve self-starting in the case of having a frequency converter 220, can timely detect that the pumping unit is in a power-sag state, can automatically make the pumping unit self-start, and the present invention utilizes the comprehensive parameters during the operation of the power supply component, the frequency converter 220, and the motor 200, and can accurately judge whether the short-term voltage drop is due to power-sag or power outage. If it is a power-sag, the pumping unit will self-start, which can ensure the safe operation of the pumping unit, reduce the labor intensity of employees, improve the operation efficiency of the pumping unit, and increase the continuous operation of the pumping unit.

[0054] In some embodiments, the execution component 120 includes: a first execution part, which is respectively connected to the control part 130 and the frequency converter 220, and is used to control the reset of the frequency converter 220; a second execution part, which is respectively connected to the control part 130 and the frequency converter 220, and is used to control the operation of the frequency converter 220.

[0055] In this embodiment, the execution component 120 includes two parts of execution components. Specifically, the execution component 120 includes a first execution part and a second execution part. The first execution part is respectively connected to the control part 130 and the frequency converter 220, and the first execution part is used to control the reset of the frequency converter 220, that is, to perform pre-start of the pumping unit.

[0056] The second execution part is respectively connected to the control part 130 and the frequency converter 220, and is used to control the operation of the frequency converter 220. The second execution part is mainly used for the self-start of the pumping unit.

[0057] The present invention sets that the execution component 120 includes a first execution part and a second execution part, which can first make the pumping unit in a pre-start state and then start the pumping unit, and can improve the safety of the pumping unit operation.

[0058] Specifically, the first execution part may include a first relay, and the second execution part may include a second relay.

[0059] In some embodiments, the communication part 110 includes an input end 112 and an output end 114. The input end 112 is used to be connected to the motor 200, the frequency converter 220, and the power supply component, and the output end 114 is connected to the control part 130.

[0060] In this embodiment, the communication part 110 specifically includes an input end 112 and an output end 114. The input end 112 is used to be connected to the motor 200, the frequency converter 220, and the power supply component, so as to obtain the motor current parameter of the motor 200, the frequency converter operation parameter, and the power supply voltage parameter of the power supply component.

[0061] The output end 114 is connected to the control part 130 to realize sending the motor current parameter of the motor 200, the frequency converter operation parameter of the frequency converter 220, and the power supply voltage parameter of the power supply component to the control part 130.

[0062] Specifically, the control unit 130 specifically includes a storage component and a processing component. The storage component is connected to the output terminal 114 of the communication unit 110. The storage component can store the motor current parameters of the motor 200, the inverter operation parameters of the inverter 220, and the power supply voltage parameters of the power supply component. The processing component is connected to the storage component. The processing component can call the motor current parameters, the inverter operation parameters, and the power supply voltage parameters in the storage component, so as to perform the power-sag self-start control on the pumping unit.

[0063] Specifically, after the pumping unit starts, the self-start device 100 starts synchronously. The communication unit 110 continuously obtains the parameters of the motor 200, the inverter 220, and the power supply component of the pumping unit, and inputs them into the storage component, and the processor continuously detects them.

[0064] Specifically, the self-start device 100 proposed by the present invention is applicable to the self-start of the pumping unit due to voltage sags (hereinafter collectively referred to as power sags), which can ensure the continuous and stable operation of the pumping unit. During the normal operation of the pumping unit, the communication unit 110 continuously monitors the power supply voltage parameters (obtained from the power supply component), the motor current parameters (obtained from the junction box 210 of the motor 200), and the inverter operation parameters (wired) of the pumping unit. When a voltage sag occurs,

[0065] The control unit 130 determines whether the pumping unit is in a power-sag state according to the motor 200 current signal (wireless), the power supply voltage signal (wired), and the inverter operation parameters (operating frequency). When it is determined to be in a power-sag state after calculation and judgment, the first relay is made to close, preparing for self-start, and the second relay is made to close to complete the self-start process within a certain time.

[0066] Specifically, the pumping unit may further include a DCS system (full name: distributed control system). This control system generates a DCS fault signal when the pumping unit operates unstably. The DCS system includes a third relay, and the third relay is used to control the generation of the DCS fault signal.

[0067] The control unit 130 is connected to the third relay. When performing self-start control, based on the fact that the pumping unit is in a power-sag state, the control unit 130 can control the third relay to reset during self-start to eliminate the DCS fault signal.

[0068] Further, the pumping unit further includes a transmission part. Specifically, the transmission part may include a pulley and a belt. The communication unit 110 is also connected to the transmission part. After the self-start is completed, the communication unit 110 can also analyze by collecting the pulse parameters of the belt, the motor current parameters of the motor 200, and the operating frequency parameters of the inverter 220 to confirm whether the pumping unit can operate normally. Otherwise, a shutdown signal is output and a remote alarm is issued.

[0069] Further, if the voltage drops and after the above logical judgment, it is finally determined that there is a power outage, the relay is not controlled to close to complete the self-start of the pumping unit.

[0070] Specifically, the communication unit 110 can also collect the motor voltage parameters of the motor 200, the power supply current parameters of the power supply component, and the stroke frequency of the pumping unit. The control unit 130 can also jointly determine whether the pumping unit has a power glitch and whether it can self-start based on the motor voltage parameters of the motor 200, the motor current parameters of the motor 200, the power supply voltage parameters of the power supply, the power supply current parameters of the power supply, the stroke frequency of the pumping unit, and the parameters of the frequency converter 220.

[0071] Specifically, the motor voltage parameters are taken from the junction box 210 of the motor 200, and the power supply current parameters of the power supply component are taken from the power supply component.

[0072] Specifically, the communication device can also collect the fault alarm inhibition signal and the power supply phase loss inhibition signal of the pumping unit.

[0073] When performing self-start control, the controller can also determine whether self-start can be performed based on the above parameters.

[0074] Specifically, the power glitch judgment time is 10 ms - 5 s, the pre-start time is within 2 min (120 s), the time to complete self-start is 100 ms, and the time to complete self-start can be customized.

[0075] As Figure 1 shown, in some embodiments, the pumping unit includes a control cabinet 230, and the self-start device 100 is arranged in the control cabinet 230.

[0076] In this embodiment, the pumping unit further includes a control cabinet 230, and the self-start device 100 is arranged in the control cabinet 230, so that the self-start device 100 is integrated into the power system of the pumping unit. The self-start device 100 is protected and is convenient to be connected to the power supply component and the frequency converter 220.

[0077] Specifically, the self-start device 100 is connected to the frequency converter 220 through a wire 240.

[0078] In an embodiment of the present invention, the present invention also proposes a self-start control method. As Figure 3 shown, the self-start control method proposed by the present invention includes:

[0079] S302: Obtain the motor current parameters of the motor, the operating parameters of the frequency converter, and the power supply voltage parameters of the power supply component;

[0080] S304: Based on the motor current parameters, the operating parameters of the frequency converter, and the power supply voltage parameters, determine whether the pumping unit is in a power glitch state;

[0081] S306: Based on the pumping unit being in a power-sag state, determine whether the pumping unit is in a self-startable state according to the motor current parameter, the frequency converter operation parameter, and the power supply voltage parameter;

[0082] S308: Based on the pumping unit being in a self-startable state, control the operation of the frequency converter to make the frequency converter control the motor to work so that the pumping unit starts automatically.

[0083] In this embodiment, the self-start control method proposed by the present invention is used to control the pumping unit to start automatically. The pumping unit includes a motor, a frequency converter, and a power supply component. The motor is the driving component of the pumping unit and can be used to drive the body of the pumping unit to perform oil pumping operations. The frequency converter is connected to the motor and is used to control the operation of the motor. The power supply component is connected to the frequency converter and is used to supply electrical energy to the driving component through the frequency converter.

[0084] The self-start control method includes: First, obtain the motor current parameter of the motor, the frequency converter operation parameter of the frequency converter, and the power supply voltage parameter of the power supply component.

[0085] After that, based on the motor current parameter, the frequency converter operation parameter, and the power supply voltage parameter, determine whether the pumping unit is in a power-sag state.

[0086] Based on the pumping unit being in a power-sag state, determine whether the pumping unit is in a self-startable state according to the motor current parameter, the frequency converter operation parameter, and the power supply voltage parameter.

[0087] Based on the pumping unit being in a self-startable state, control the power supply of the frequency converter to make the frequency converter control the motor to work so that the pumping unit starts automatically.

[0088] The self-start device proposed by the present invention can achieve self-start in the case of having a frequency converter, can timely detect that the pumping unit is in a power-sag state, can automatically start the pumping unit, and the present invention utilizes the comprehensive parameters during the operation of the power supply component, the frequency converter, and the motor, and can accurately judge whether the short-term voltage drop is due to power-sag or power outage. If it is power-sag, the pumping unit will be started automatically, which can ensure the safe operation of the pumping unit, reduce the labor intensity of employees, improve the operation efficiency of the pumping unit, and increase the continuous operation of the pumping unit.

[0089] As Figure 4 shown, in an embodiment of the present invention, the self-start control method proposed by the present invention includes:

[0090] S402: Obtain the motor current parameter of the motor, the frequency converter operation parameter of the frequency converter, and the power supply voltage parameter of the power supply component;

[0091] S404: Compare the motor current signal, the frequency converter operation parameter, and the power supply voltage parameter with the power-sag condition;

[0092] S406: Based on the fact that the motor current signal, the operating parameters of the frequency converter, and the power supply voltage parameters all meet the power-sag conditions, it is determined that the pumping unit is in a power-sag state;

[0093] S408: Based on the fact that the pumping unit is in a power-sag state, determine whether the pumping unit is in a self-startable state according to the motor current parameters, the operating parameters of the frequency converter, and the power supply voltage parameters;

[0094] S410: Based on the fact that the pumping unit is in a self-startable state, control the operation of the frequency converter so that the frequency converter controls the motor to work, so as to make the pumping unit self-start.

[0095] In this embodiment, the present invention determines whether the pumping unit is in a power-sag state according to the motor current signal, the operating parameters of the frequency converter, and the power supply voltage parameters.

[0096] Specifically, the present invention pre-sets power-sag conditions, and the power-sag conditions include the ranges that the motor current signal, the power supply voltage signal, and the operating frequency of the frequency converter will be in when the pumping unit is in a power-sag state. Compare the above parameters with the power-sag conditions one by one. When the motor current signal, the power supply voltage signal, and the operating frequency of the frequency converter all meet the power-sag conditions, the control unit can determine that the pumping unit is in a power-sag state.

[0097] The present invention utilizes the comprehensive parameters during the operation of the power supply component, the frequency converter, and the drive component, and can accurately determine whether the short-term voltage drop is due to power-sag or power outage. If it is power-sag, the pumping unit will self-start, which can ensure the safe operation of the pumping unit, reduce the labor intensity of employees, improve the operation efficiency of the pumping unit, and increase the continuous operation of the pumping unit.

[0098] As Figure 5 shown, Figure 3 of the flowchart of the self-start control method proposed by the present invention is shown. Specifically, the self-start control method includes:

[0099] S502: Obtain the motor current parameters of the motor, the operating parameters of the frequency converter, and the power supply voltage parameters of the power supply component;

[0100] S504: Based on the motor current parameters, the operating parameters of the frequency converter, and the power supply voltage parameters, determine whether the pumping unit is in a power-sag state;

[0101] S506: Compare the motor current signal, the operating parameters of the frequency converter, and the power supply voltage parameters with the self-start conditions;

[0102] S508: Based on the fact that the motor current signal, the operating parameters of the frequency converter, and the power supply voltage parameters all meet the self-start conditions, determine that the pumping unit is in a self-startable state;

[0103] S510: Based on the fact that the pumping unit is in a self-startable state, control the operation of the frequency converter so that the frequency converter controls the motor to work, so as to make the pumping unit self-start.

[0104] In this embodiment, for the self-start control method proposed by the present invention, a process for determining whether a pumping unit can self-start is set. Specifically, based on the fact that the pumping unit is in a power-sag state, it is determined whether the pumping unit is in a state where it can self-start according to the motor current parameter, the frequency converter operation parameter, and the power supply voltage parameter. Specifically, it includes: comparing the motor current parameter, the frequency converter operation parameter, and the power supply voltage parameter with the self-start condition; based on the fact that the motor current signal, the frequency converter operation parameter, and the power supply voltage parameter all meet the self-start condition, determining that the pumping unit is in a state where it can self-start.

[0105] The self-start condition includes the normal range values that the motor current parameter, the frequency converter operation parameter, and the power supply voltage parameter should be in. When the above parameters are all within the normal values, the present invention controls the pumping unit to self-start, which can improve the safety of the pumping unit self-start and ensure the safe operation of the pumping unit.

[0106] Specifically, the self-start condition includes that the motor current before the pumping unit stops pumping is less than the rated current of the motor, and the power supply voltage signal and the operating frequency of the frequency converter are within the set range.

[0107] Specifically, it is also possible to simultaneously determine whether the pumping unit can self-start through the motor voltage parameter, the power supply current parameter, and the stroke frequency.

[0108] Specifically, the self-start condition further includes: the temporary voltage drop time of the motor voltage parameter is less than one second, and the power supply current signal is within the set range.

[0109] As Figure 6 shown, Figure 4 shows the schematic flow diagram of the self-start control method proposed by the present invention. Specifically, the self-start control method includes:

[0110] S602: Obtain the motor current parameter of the motor, the frequency converter operation parameter of the frequency converter, and the power supply voltage parameter of the power supply component;

[0111] S604: Based on the motor current parameter, the frequency converter operation parameter, and the power supply voltage parameter, determine whether the pumping unit is in a power-sag state;

[0112] S606: Based on the fact that the pumping unit is in a power-sag state, determine whether the pumping unit is in a state where it can self-start according to the motor current parameter, the frequency converter operation parameter, and the power supply voltage parameter;

[0113] S608: Based on the fact that the pumping unit is in a state where it can self-start, control the frequency converter to reset;

[0114] S610: After the first time period, control the frequency converter to operate, so that the frequency converter controls the motor to work, so that the pumping unit self-starts.

[0115] In this embodiment, when the self-start control method proposed by the present invention controls the pumping unit to perform self-start under power supply interruption, there is also a pre-start process. Specifically, based on the fact that the pumping unit is in a state where it can self-start, the frequency converter is powered on, and the frequency converter controls the motor to operate, so that the pumping unit self-starts. Specifically, it includes: based on the fact that the pumping unit is in a state where it can self-start, the frequency converter is reset, so as to perform a self-check before starting the power system of the pumping unit.

[0116] After the first time period, the frequency converter is controlled to operate, and the frequency converter controls the motor to operate, so that the pumping unit self-starts.

[0117] By setting the pre-start process, the present invention can improve the safety of self-starting when the pumping unit has a power supply interruption problem.

[0118] Specifically, the first time period is within 2 minutes (120 s).

[0119] As Figure 7 shown, in an embodiment of the present invention, a self-start control device 700 is further provided for controlling the pumping unit to self-start. The pumping unit includes: a motor, a frequency converter, and a power supply component. The self-start control device 700 includes: an acquisition unit 710 for acquiring the motor current parameter of the motor, the frequency converter operation parameter of the frequency converter, and the power supply voltage parameter of the power supply component; a first processing unit 720 for determining whether the pumping unit is in a power supply interruption state based on the motor current parameter, the frequency converter operation parameter, and the power supply voltage parameter; a second processing unit 730 for determining whether the pumping unit is in a state where it can self-start according to the motor current parameter, the frequency converter operation parameter, and the power supply voltage parameter based on the fact that the pumping unit is in a power supply interruption state; an execution unit 740 for controlling the frequency converter to be powered on based on the fact that the pumping unit is in a state where it can self-start, and the frequency converter controls the motor to operate, so that the pumping unit self-starts.

[0120] The self-start control device 700 proposed by the present invention is used to control the pumping unit to self-start. The pumping unit includes a motor, a frequency converter, and a power supply component. The motor is the driving component of the pumping unit and can be used to drive the body of the pumping unit to perform pumping operations. The frequency converter is connected to the motor and is used to control the operation of the motor. The power supply component is connected to the frequency converter and is used to supply electrical energy to the driving component through the frequency converter.

[0121] The self-start control device 700 includes an acquisition unit 710, a first processing unit 720, a second processing unit 730, and an execution unit 740. The acquisition unit 710 is used to acquire the motor current parameter of the motor, the frequency converter operation parameter of the frequency converter, and the power supply voltage parameter of the power supply component.

[0122] The first processing unit 720 is used to determine whether the pumping unit is in a power supply interruption state based on the motor current parameter, the frequency converter operation parameter, and the power supply voltage parameter.

[0123] The second processing unit 730 is configured to determine whether the pumping unit is in a self-startable state based on the motor current parameter, the frequency converter operation parameter, and the power supply voltage parameter when the pumping unit is in a power-sag state.

[0124] The execution unit 740 is configured to control the operation of the frequency converter based on the pumping unit being in a self-startable state, so that the frequency converter controls the motor to operate, thereby enabling the pumping unit to self-start.

[0125] The self-start control device 700 proposed by the present invention can realize the self-start control of the pumping unit when the pumping unit is equipped with a frequency converter, can timely detect that the pumping unit is in a power-sag state, can automatically start the pumping unit, and the present invention utilizes the comprehensive parameters during the operation of the power supply component, the frequency converter, and the motor, and can accurately determine whether the short-term voltage drop is due to a power-sag or a power outage. If it is a power-sag, the pumping unit will be self-started, which can ensure the safe operation of the pumping unit, reduce the labor intensity of employees, improve the operation efficiency of the pumping unit, and increase the continuous operation of the pumping unit.

[0126] Specifically, in the process of determining whether the pumping unit is in a power-sag state based on the motor current parameter, the frequency converter operation parameter, and the power supply voltage parameter, the first processing unit 720 is specifically configured to: compare the motor current signal, the frequency converter operation parameter, and the power supply voltage parameter with the power-sag condition; and determine that the pumping unit is in a power-sag state based on the fact that the motor current signal, the frequency converter operation parameter, and the power supply voltage parameter all meet the power-sag condition.

[0127] Specifically, in the process of determining whether the pumping unit is in a self-startable state based on the pumping unit being in a power-sag state and according to the motor current parameter, the frequency converter operation parameter, and the power supply voltage parameter, the second processing unit 730 is specifically configured to: compare the motor current signal, the frequency converter operation parameter, and the power supply voltage parameter with the self-start condition; and determine that the pumping unit is in a self-startable state based on the fact that the motor current signal, the frequency converter operation parameter, and the power supply voltage parameter all meet the self-start condition.

[0128] Specifically, in the process of controlling the operation of the frequency converter based on the pumping unit being in a self-startable state, so that the frequency converter controls the motor to operate, thereby enabling the pumping unit to self-start, the execution unit 740 is specifically configured to: control the reset of the frequency converter based on the pumping unit being in a self-startable state; and after a first time period, control the operation of the frequency converter, so that the frequency converter controls the motor to operate, thereby enabling the pumping unit to self-start.

[0129] In an embodiment of the present invention, a storage medium is further proposed, on which a computer program is stored, and when the program is executed by a processor, the steps of the self-start control method in any of the above embodiments are implemented.

[0130] In this embodiment, the storage medium proposed by the present invention, when the program is executed by the processor, implements the steps of the self-start control method in any of the above embodiments, and thus has all the beneficial effects of the self-start control method in any of the above embodiments.

[0131] Specifically, the storage medium may be a non-transitory computer-readable storage medium. For example, the non-transitory computer-readable storage medium may be a ROM.

[0132] Although this specification contains many specific implementation details, these should not be construed as limiting the scope of any invention or the scope of what is claimed, but rather are mainly used to describe the features of specific embodiments of a particular invention. Certain features described in multiple embodiments in this specification may also be combined and implemented in a single embodiment. On the other hand, the various features described in a single embodiment may also be separately implemented in multiple embodiments or implemented in any suitable sub-combination. In addition, although features may operate in certain combinations as described above and are even initially claimed as such, one or more features from the claimed combination may in some cases be removed from the combination, and the claimed combination may be directed to a sub-combination or a variation of the sub-combination.

[0133] Similarly, although the operations are depicted in the drawings in a particular order, this should not be construed as requiring that the operations be performed in the particular order shown or sequentially, or that all illustrated operations be performed, to achieve the desired result. In some cases, multitasking and parallel processing may be advantageous. In addition, the separation of the various system units and components in the above embodiments should not be construed as requiring such separation in all embodiments, and it should be understood that the described program components and systems can generally be integrated together in a single software product or packaged into multiple software products.

[0134] Thus, specific embodiments of the subject matter have been described. Other embodiments are within the scope of the appended claims. In some cases, the acts recited in the claims may be performed in a different order and still achieve the desired result. In addition, the processes depicted in the drawings are not necessarily in the particular order or sequential order shown to achieve the desired result. In some implementations, multitasking and parallel processing may be advantageous.

[0135] It should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0136] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather will conform to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An auto-starting device (100), characterized in that, For controlling a pumping unit to perform self - starting, the pumping unit includes a motor (200), a frequency converter (220) and a power supply component, and the self - starting device (100) includes: A communication unit (110) for connecting to the motor (200), the frequency converter (220) and the power supply component. The communication unit (110) can obtain the motor current parameter of the motor (200), the operation parameter of the frequency converter of the frequency converter (220) and the power supply voltage parameter of the power supply component; An execution component (120) for connecting to the frequency converter (220); A control unit (130) is respectively connected to the communication unit (110) and the execution component (120). The communication unit (110) can send the motor current parameter, the frequency converter operation parameter and the power supply voltage parameter to the control unit (130). The control unit (130) can determine whether the pumping unit is in a power - swing state according to the motor current parameter, the frequency converter operation parameter and the power supply voltage parameter; Based on the pumping unit being in the power - swing state, the control unit (130) can also determine whether the pumping unit is in a self - starting state according to the motor current parameter, the frequency converter operation parameter and the power supply voltage parameter; Based on the pumping unit being in the self - starting state, the control unit (130) controls the execution component (120) to work, and the execution component (120) controls the frequency converter (220) to operate, so that the frequency converter (220) controls the motor (200) to work, so as to make the pumping unit self - start.

2. The auto-starting device (100) according to claim 1, characterized in that, The execution component (120) includes: A first execution part, which is respectively connected to the control unit (130) and the frequency converter (220), and is used to control the reset of the frequency converter (220); A second execution part, which is respectively connected to the control unit (130) and the frequency converter (220), and is used to control the operation of the frequency converter (220).

3. The auto-starting device (100) according to claim 1, characterized in that, The communication unit (110) includes: An input end (112) for connecting to the motor (200), the frequency converter (220) and the power supply component An output end (114), which is connected to the control unit (130).

4. The auto-starting device (100) according to claim 1, characterized in that, The pumping unit includes a control cabinet, and the self - starting device (100) is arranged in the control cabinet.

5. An auto-starting control method, characterized in that, For controlling a pumping unit to perform self - starting, the pumping unit includes: a motor, a frequency converter and a power supply component. The self - starting control method includes: Obtaining the motor current parameter of the motor, the operation parameter of the frequency converter of the frequency converter and the power supply voltage parameter of the power supply component; Based on the motor current parameter, the frequency converter operation parameter and the power supply voltage parameter, determining whether the pumping unit is in a power - swing state; Based on the pumping unit being in the power - swing state, determining whether the pumping unit is in a self - starting state according to the motor current parameter, the operation parameter of the frequency converter and the power supply voltage parameter; Based on the pumping unit being in the self - starting state, controlling the frequency converter to operate, so that the frequency converter controls the motor to work, so as to make the pumping unit self - start.

6. The auto-starting control method according to claim 5, characterized in that, Determining whether the pumping unit is in a power-sag state based on the motor current parameters, the frequency converter operation parameters, and the power supply voltage parameters includes: Comparing the motor current signal, the frequency converter operation parameters, and the power supply voltage parameters with the power-sag conditions; Based on the fact that the motor current signal, the frequency converter operation parameters, and the power supply voltage parameters all meet the power-sag conditions, determining that the pumping unit is in the power-sag state.

7. The auto-starting control method according to claim 5, characterized in that, Determining whether the pumping unit is in a self-startable state according to the motor current parameters, the frequency converter operation parameters, and the power supply voltage parameters includes: Comparing the motor current signal, the frequency converter operation parameters, and the power supply voltage parameters with the self-start conditions; Based on the fact that the motor current signal, the frequency converter operation parameters, and the power supply voltage parameters all meet the self-start conditions, determining that the pumping unit is in the self-startable state.

8. The auto-starting control method according to claim 5, characterized in that, Controlling the operation of the frequency converter so that the frequency converter controls the motor to work to make the pumping unit self-start specifically includes: Controlling the reset of the frequency converter; After a first time period, controlling the operation of the frequency converter so that the frequency converter controls the motor to work.

9. An auto-starting control device, characterized in that, For controlling the pumping unit to perform self-start, the pumping unit includes: a motor, a frequency converter, and a power supply component, and the self-start control device includes: An acquisition unit that acquires the motor current parameters of the motor, the frequency converter operation parameters of the frequency converter, and the power supply voltage parameters of the power supply component; A first processing unit for determining whether the pumping unit is in a power-sag state based on the motor current parameters, the frequency converter operation parameters, and the power supply voltage parameters; A second processing unit for determining whether the pumping unit is in a self-startable state according to the motor current parameters, the frequency converter operation parameters, and the power supply voltage parameters based on the fact that the pumping unit is in the power-sag state; An execution unit for controlling the operation of the frequency converter based on the fact that the pumping unit is in the self-startable state so that the frequency converter controls the motor to work to make the pumping unit self-start.

10. A storage medium, on which a computer program is stored, characterized in that, When the program is executed by a processor, it implements the steps of the self-start control method according to any one of claims 5 to 8.

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