Method, system, device and storage medium for conditioning of an electrical grid for a pumping unit

Abstract

The application discloses a method, device, equipment and storage medium for adjusting the power grid of a pumping unit, wherein the method comprises the following steps: setting the working point of the adjusting type pumping unit at a non-optimal stroke value; the non-optimal stroke value is lower than an optimal stroke value; acquiring the output information data of the power generator of the power grid in real time; when it is determined that the power grid has instantaneous fluctuation according to the output information data, generating the frequency control instruction of the pumping unit frequency converter of the adjusting type pumping unit according to a first preset algorithm; according to the application, when the output of the power generator of the power grid instantaneously increases, the current frequency of the pumping unit motor is increased through the pumping unit frequency converter, the process of converting the gravitational potential energy of the pumping rod into electric energy is slowed down, and the instantaneous electric quantity of the motor reverse power generation is reduced, so that the purpose of equivalent increase of the power load is achieved, and the excess power generation is balanced.

Description

Technical Field

[0001] This invention relates to the petrochemical field, and particularly to methods, systems, devices, and storage media for regulating power grids used in oil pumping units. Background Technology

[0002] In oil extraction, the power grid system is usually used as an energy source, and an electric motor drives an oil pumping unit to extract oil from the surface.

[0003] To avoid the negative impacts caused by fluctuations in the power grid system, the existing methods mainly involve adding generators or energy storage, or simply starting and stopping the oil pumping unit.

[0004] The inventors discovered through research that the existing methods for regulating the power grid used in oil pumping units have at least the following drawbacks:

[0005] Adding generators or energy storage increases equipment investment and is not economically viable. Simple pumping unit start-up and shutdown methods cannot compensate for instantaneous grid fluctuations, and the start-up and shutdown of pumping units cause shocks to the equipment, resulting in poor grid fluctuation regulation. Summary of the Invention

[0006] The main objective of this invention is to improve the stability of oilfield power grids.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] This invention discloses a method for regulating the power grid of an oil pumping unit, comprising the following steps:

[0009] S11. Set the operating point of the adjustable pumping unit to a non-optimal stroke rate; the non-optimal stroke rate is lower than the optimal stroke rate.

[0010] S12. Real-time acquisition of generator output information data from the power grid;

[0011] S13. When it is determined that the power grid experiences instantaneous fluctuations based on the output information data, a frequency control command for the pumping unit inverter of the regulating pumping unit is generated according to a first preset algorithm; the first preset algorithm includes:

[0012] A first correspondence is pre-generated between the change in the rotational speed of the motor of the regulating pumping unit and the change in the electrical energy generated by the reverse generator of the motor of the regulating pumping unit;

[0013] Based on the current fluctuation amplitude of the instantaneous fluctuation in the power grid, calculate the current power regulation amplitude of the reverse power generation of the regulating pumping unit motor;

[0014] The current speed change of the motor is determined based on the current power regulation amplitude and the first correspondence.

[0015] The frequency control command is generated based on the current change in motor speed.

[0016] Preferably, in this invention, it further includes:

[0017] S14. When it is determined from the output information data that the power grid experiences short-term or medium-term fluctuations, a speed control command for the pumping unit inverter of the regulating pumping unit is generated according to a second preset algorithm; the speed control command is used to control the speed of the motor of the regulating pumping unit; the second preset algorithm includes:

[0018] A second correspondence is pre-generated between the change in the pumping fluid volume and the change in the power consumption of the regulating pumping unit;

[0019] Based on the current fluctuation amplitude of the short-term or medium-term fluctuation of the power grid, calculate the current power regulation amplitude of the power consumed by the regulating pumping unit;

[0020] The change in the current pumping fluid volume of the regulating pumping unit is determined based on the current power adjustment amplitude and the second correspondence.

[0021] The rotational speed control command is generated based on the current change in the pumped oil volume.

[0022] Preferably, in this invention, the adjustable pumping unit includes multiple units, and the up and down strokes of the multiple adjustable pumping units are consistent.

[0023] Preferably, in this invention, the frequency adjustment range of the pumping unit inverter includes:

[0024] The frequency-power characteristic of the adjustable pumping unit is approximately linear in the region.

[0025] Preferably, in this invention, the pumping unit frequency converter includes a four-quadrant frequency converter.

[0026] Preferably, in this invention, setting the operating point of the regulating pumping unit to a non-optimal stroke value includes:

[0027] The range of the non-optimal stroke value is 80%-90% of the optimal stroke value.

[0028] In another aspect of the invention, a regulating device for the power grid of an oil pumping unit is also provided, comprising:

[0029] The stroke setting unit is used to set the operating point of the regulating pumping unit to a non-optimal stroke value; the non-optimal stroke value is lower than the optimal stroke value.

[0030] Implement a monitoring unit to acquire real-time power output information data of the power grid's generators;

[0031] A frequency command unit is used to generate a frequency control command for the pumping unit inverter of the regulating pumping unit according to a first preset algorithm when it is determined from the output information data that a momentary fluctuation has occurred in the power grid; the first preset algorithm includes:

[0032] A first correspondence is pre-generated between the change in the rotational speed of the motor of the regulating pumping unit and the change in the electrical energy generated by the reverse generator of the motor of the regulating pumping unit;

[0033] Based on the current fluctuation amplitude of the instantaneous fluctuation in the power grid, calculate the current power regulation amplitude of the reverse power generation of the regulating pumping unit motor;

[0034] The current speed change of the motor is determined based on the current power regulation amplitude and the first correspondence.

[0035] The frequency control command is generated based on the current change in motor speed.

[0036] Preferably, in this invention, it further includes:

[0037] A speed control unit is used to generate a speed control command for the pumping unit inverter of the regulating pumping unit according to a second preset algorithm when it is determined from the output information data that the power grid is experiencing short-term or medium-term fluctuations. The speed control command is used to control the speed of the motor of the regulating pumping unit. The second preset algorithm includes:

[0038] A second correspondence is pre-generated between the change in the pumping fluid volume and the change in the power consumption of the regulating pumping unit;

[0039] Based on the current fluctuation amplitude of the short-term or medium-term fluctuation of the power grid, calculate the current power regulation amplitude of the power consumed by the regulating pumping unit;

[0040] The change in the current pumping fluid volume of the regulating pumping unit is determined based on the current power adjustment amplitude and the second correspondence.

[0041] The rotational speed control command is generated based on the current change in the pumped oil volume.

[0042] In another aspect of this invention, a regulating device for the power grid of an oil pumping unit is also provided, comprising:

[0043] Memory, used to store computer programs;

[0044] A processor for invoking and executing the computer program to implement the various steps of the method for regulating the power grid for an oil pumping unit as described in any of the preceding claims.

[0045] In another aspect of the present invention, a storage medium is also provided, on which a computer program is stored, which, when executed by a processor, implements the various steps of the method for regulating the power grid for an oil pumping unit as described in any of the preceding claims.

[0046] Beneficial effects

[0047] This invention addresses the issue of increasing instantaneous power generation by lowering the pumping unit motor's frequency via a frequency converter when the grid generator output momentarily decreases. This accelerates the conversion of the sucker rod's gravitational potential energy into electrical energy, thus increasing the instantaneous power output of the motor and quickly supplementing the insufficient grid generator output. Conversely, when the grid generator output momentarily increases, increasing the pumping unit motor's frequency via a frequency converter slows down the conversion of the sucker rod's gravitational potential energy into electrical energy, thereby reducing the instantaneous power output of the motor. This effectively increases the electrical load and balances excess power generation.

[0048] Furthermore, this invention can also regulate the speed of the regulating pumping unit motor to eliminate short-term or medium-term fluctuations by adjusting the pumped oil volume. Specifically, if the motor speed of the regulating pumping unit decreases, the pumped oil volume decreases, resulting in a reduction in the power consumption of the regulating pumping unit, which is equivalent to increasing the power output of a generator. Conversely, if the speed of the regulating pumping unit increases, the pumped oil volume increases, resulting in a reduction in the power consumption of the regulating pumping unit, which is equivalent to reducing the power output of a generator. Therefore, this embodiment of the invention utilizes pumping unit speed regulation to achieve power regulation, equivalent to regulating the power output of a power grid generator.

[0049] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it according to the contents of the specification, and to make the above and other objectives, technical features and advantages of this application easier to understand, one or more preferred embodiments are listed below and described in detail with reference to the accompanying drawings. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0051] Figure 1 This is a schematic diagram illustrating the steps of the method for regulating the power grid of an oil pumping unit as described in this invention;

[0052] Figure 2This is a schematic diagram of another step in the method for regulating the power grid of an oil pumping unit as described in this invention;

[0053] Figure 3 This is a schematic diagram of the structure of the regulating device for the power grid of the oil pumping unit described in this invention;

[0054] Figure 4 This is another schematic diagram of the regulating device for the power grid of the oil pumping unit described in this invention;

[0055] Figure 5 This is a schematic diagram of the structure of the power grid regulating device for the oil pumping unit described in this invention. Detailed Implementation

[0056] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0057] Example 1

[0058] To improve the stability of the oilfield power grid, refer to Figure 1 This invention provides a method for regulating the power grid of an oil pumping unit, comprising the following steps:

[0059] S11. Set the operating point of the adjustable pumping unit to a non-optimal stroke rate; the non-optimal stroke rate is lower than the optimal stroke rate.

[0060] This invention requires adjusting the fluctuations of the power grid system by controlling the motor frequency of the regulating pumping unit. In order to leave an adjustment margin, the operating point of the regulating pumping unit needs to be set below the optimal stroke value. In this way, when it is necessary to increase the motor frequency of the regulating pumping unit, there will be an adjustment margin.

[0061] In practical applications, the range of non-optimal impulse values ​​can be determined based on the magnitude of the actual fluctuations in the power grid in the past. Preferably, the optimal impulse value can be 80%-90% of the optimal impulse value.

[0062] Preferably, in this embodiment of the invention, the pumping unit frequency converter used to control the motor frequency of the regulating pumping unit can be a four-quadrant frequency converter.

[0063] S12. Real-time acquisition of generator output information data from the power grid;

[0064] In this embodiment of the invention, it is also necessary to obtain real-time information such as whether the power grid is fluctuating, the type of fluctuation, and the amount of fluctuation by acquiring real-time power output information data of the generators in the power grid.

[0065] In practical applications, the power output information of the generators in the power grid can be obtained from the generators themselves, or by collecting power grid frequency information or from the power grid dispatching system.

[0066] S13. When it is determined that the power grid experiences instantaneous fluctuations based on the output information data, a frequency control command for the pumping unit inverter of the regulating pumping unit is generated according to a first preset algorithm; the first preset algorithm includes:

[0067] A first correspondence is pre-generated between the change in the rotational speed of the motor of the regulating pumping unit and the change in the electrical energy generated by the reverse generator of the motor of the regulating pumping unit;

[0068] Based on the current fluctuation amplitude of the instantaneous fluctuation in the power grid, calculate the current power regulation amplitude of the reverse power generation of the regulating pumping unit motor;

[0069] The current speed change of the motor is determined based on the current power regulation amplitude and the first correspondence.

[0070] The frequency control command is generated based on the current change in motor speed.

[0071] In the prior art, instantaneous fluctuations in generators can be controlled by inertial regulation; the inventive concept of this invention includes:

[0072] During the downstroke of a regulating pumping unit, the sucker rod descends, converting gravitational potential energy into the kinetic energy of the counterweight, and partially generating electricity to feed back into the grid. At this time, frequency regulation of the pumping unit's motor allows for control of the inertia of the sucker rod and counterweight. This enables rapid increases or decreases in the electrical energy generated by the motor, thereby regulating instantaneous fluctuations. Specifically:

[0073] When the output of the grid generator decreases instantaneously, the frequency of the pumping unit motor can be reduced by the pumping unit frequency converter. This can accelerate the process of converting the gravitational potential energy of the sucker rod into electrical energy, thereby increasing the instantaneous power generated by the motor. In this way, it can quickly supplement the insufficient output of the grid generator.

[0074] When the output of the grid generator increases instantaneously, the current frequency of the pumping unit motor can be increased by the pumping unit frequency converter. This slows down the process of converting the gravitational potential energy of the sucker rod into electrical energy, thereby reducing the instantaneous power generation of the motor. In this way, the purpose of effectively increasing the power load is achieved, balancing the excess power generation.

[0075] Based on the above inventive concept, in this embodiment of the invention, the specific working principle of the first preset algorithm for generating frequency control commands for the pumping unit frequency converter is as follows:

[0076] A first correspondence is pre-generated between the change in the rotational speed of the motor of the regulating pumping unit and the change in the electrical energy generated by the reverse generator of the motor of the regulating pumping unit;

[0077] In practical applications, the correspondence between the change in the rotational speed of the regulating pumping unit's motor and the change in electrical energy generated by the reverse generation of the regulating pumping unit's motor can be calculated or, through a limited number of experiments, based on the parameters of the regulating pumping unit and its motor (i.e., the first correspondence).

[0078] It should be noted that the adjustable pumping unit in the embodiments of the present invention may include multiple adjustable pumping units, and the working states of the multiple adjustable pumping units during the up and down strokes must be consistent; in this way, the dynamic consistency of the power-frequency external characteristics can be guaranteed.

[0079] Based on the current fluctuation amplitude of the instantaneous fluctuation in the power grid, calculate the current power regulation amplitude of the reverse power generation of the regulating pumping unit motor;

[0080] Based on real-time power output data of the generators in the power grid, when a momentary fluctuation occurs in the power grid, the electrical energy required to eliminate the momentary fluctuation can be calculated based on the fluctuation amplitude. In turn, the current electrical energy regulation amplitude of the reverse power generation of the regulating pumping unit motor can be calculated.

[0081] The current speed change of the motor is determined based on the current power regulation amplitude and the first correspondence.

[0082] Based on the first correspondence, the required change in motor speed corresponding to the current power regulation amplitude can be calculated or determined;

[0083] Based on the current change in motor speed, a frequency control command is generated, allowing for frequency adjustment of the regulating pumping unit motor. This adjustment eliminates instantaneous fluctuations by regulating the amount of electricity generated by the motor. Specifically, lowering the current frequency of the pumping unit motor increases the amount of electricity generated by the motor, quickly supplementing insufficient power output from the grid generators. Conversely, increasing the current frequency of the pumping unit motor reduces the amount of electricity generated by the motor, effectively increasing the electrical load and balancing excess power generation.

[0084] Preferably, in order to obtain a better fluctuation regulation effect, such as Figure 2 As shown, in this embodiment of the invention, the frequency adjustment range of the pumping unit inverter can be set in the region where the frequency-power characteristic of the adjustable pumping unit is approximately linear.

[0085] In summary, in this embodiment of the invention, when the grid generator output decreases instantaneously, reducing the current frequency of the pumping unit motor by using the pumping unit frequency converter accelerates the conversion of the sucker rod's gravitational potential energy into electrical energy, thereby increasing the instantaneous power generated by the motor. This effectively compensates for insufficient grid generator output. Conversely, when the grid generator output increases instantaneously, increasing the current frequency of the pumping unit motor by using the pumping unit frequency converter slows down the conversion of the sucker rod's gravitational potential energy into electrical energy, thus reducing the instantaneous power generated by the motor. This effectively increases the power load and balances excess power generation.

[0086] Example 2

[0087] refer to Figure 2 Based on Embodiment 1, the embodiments of the present invention may further include the following steps:

[0088] S14. When it is determined from the output information data that the power grid experiences short-term or medium-term fluctuations, a speed control command for the pumping unit inverter of the regulating pumping unit is generated according to a second preset algorithm; the speed control command is used to control the speed of the motor of the regulating pumping unit; the second preset algorithm includes:

[0089] A second correspondence is pre-generated between the change in the pumping fluid volume and the change in the power consumption of the regulating pumping unit;

[0090] Based on the current fluctuation amplitude of the short-term or medium-term fluctuation of the power grid, calculate the current power regulation amplitude of the power consumed by the regulating pumping unit;

[0091] The change in the current pumping fluid volume of the regulating pumping unit is determined based on the current power adjustment amplitude and the second correspondence.

[0092] The rotational speed control command is generated based on the current change in the pumped oil volume.

[0093] In this embodiment of the invention, based on the technical solution for eliminating instantaneous fluctuations in Embodiment 1, an additional technical solution for eliminating short-term or medium-term fluctuations in the power grid is added. The specific inventive concept includes:

[0094] The inventors discovered through research that by adjusting the pumping fluid volume of the regulating pumping unit, the power consumption of the regulating pumping unit can be changed, which is equivalent to adjusting the load of the grid motor. Therefore, in this embodiment of the invention, when the grid experiences short-term or medium-term fluctuations, the load of the grid motor is adjusted by controlling the pumping fluid volume of the regulating pumping unit, thereby eliminating the short-term or medium-term fluctuations. In this embodiment of the invention, the control of the pumping fluid volume is achieved by adjusting the motor frequency of the regulating pumping unit. The specific working principle includes:

[0095] A second correspondence is pre-generated between the change in the pumping fluid volume and the change in the power consumption of the regulating pumping unit;

[0096] In practical applications, the correspondence between the change in the pumped oil volume and the change in power consumption of the regulating pumping unit can be calculated or determined through a limited number of experiments based on the parameters of the regulating pumping unit and its motor (i.e., the second correspondence).

[0097] The adjustable pumping unit in this embodiment of the invention may include multiple adjustable pumping units, and the working states of the multiple adjustable pumping units during the up and down strokes need to be consistent; in this way, the dynamic consistency of the power-frequency external characteristics can be guaranteed.

[0098] Based on the current fluctuation amplitude of the short-term or medium-term fluctuation of the power grid, calculate the current power regulation amplitude of the power consumed by the regulating pumping unit;

[0099] Based on real-time power output data of the grid's generators, when short-term or medium-term fluctuations occur in the grid, the electrical energy required to eliminate these fluctuations can be calculated based on their amplitude. Consequently, the current power regulation amplitude of the regulating pumping unit can also be calculated.

[0100] The change in the current pumping fluid volume of the regulating pumping unit is determined based on the current power adjustment amplitude and the second correspondence.

[0101] Based on the second correspondence, the change in pumping fluid volume corresponding to the current power adjustment amplitude can be calculated or determined.

[0102] Since the pumping fluid volume of the regulating pumping unit can be controlled by the frequency of its motor, a speed control command can be generated based on the current change in the pumping fluid volume. This allows for speed regulation of the regulating pumping unit motor, thereby eliminating short-term or medium-term fluctuations in the pumping fluid volume. Specifically, if the motor speed decreases, the pumping fluid volume decreases, leading to a reduction in the power consumption of the regulating pumping unit, which is equivalent to increasing the power output of a generator. Conversely, if the pumping unit speed increases, the pumping fluid volume increases, leading to an increase in the power consumption of the regulating pumping unit, which is equivalent to reducing the power output of a generator. Therefore, this embodiment of the invention utilizes pumping unit speed regulation to achieve power regulation, equivalent to regulating the power output of a power grid generator.

[0103] In summary, in this embodiment of the invention, the regulating pumping unit operates at a non-optimal stroke rate, allowing for both increases and decreases in fluid volume. Because a frequency converter is used to regulate the fluid volume, the adjustment speed is relatively gradual, thus achieving flexible regulation of the power load, which is equivalent to adjustable power generation output. In this embodiment, the frequency converter of the regulating pumping unit should be a four-quadrant frequency converter, changing the frequency setting according to grid fluctuations, and can participate in bidirectional regulation of the grid frequency.

[0104] Example 3

[0105] In another aspect of this invention, a regulating device for the power grid of an oil pumping unit is also provided. Figure 3 The diagram shows a structural schematic of a regulating device for the power grid of an oil pumping unit according to an embodiment of the present invention. The regulating device for the power grid of the oil pumping unit is... Figure 1 or Figure 2 The system corresponding to the power grid regulation method for the oil pumping unit described in the corresponding embodiment is implemented through a virtual device. Figure 1 or Figure 2 The regulation method for the power grid of the oil pumping unit in the corresponding embodiment, wherein each virtual module constituting the regulation device for the power grid of the oil pumping unit can be executed by electronic devices, such as network devices, terminal devices, or servers. The regulation device for the power grid of the oil pumping unit in this embodiment can realize the regulation of the power grid for the oil pumping unit required for industrial control. Specifically, the regulation device for the power grid of the oil pumping unit in this embodiment includes:

[0106] The stroke setting unit 01 is used to set the operating point of the adjustable pumping unit to a non-optimal stroke value; the non-optimal stroke value is lower than the optimal stroke value.

[0107] The monitoring unit 02 is used to acquire real-time power output information data of the generators in the power grid;

[0108] Frequency command unit 03 is used to generate a frequency control command for the pumping unit inverter of the regulating pumping unit according to a first preset algorithm when it is determined from the output information data that the power grid has experienced a momentary fluctuation; the first preset algorithm includes:

[0109] A first correspondence is pre-generated between the change in the rotational speed of the motor of the regulating pumping unit and the change in the electrical energy generated by the reverse generator of the motor of the regulating pumping unit;

[0110] Based on the current fluctuation amplitude of the instantaneous fluctuation in the power grid, calculate the current power regulation amplitude of the reverse power generation of the regulating pumping unit motor;

[0111] The current speed change of the motor is determined based on the current power regulation amplitude and the first correspondence.

[0112] The frequency control command is generated based on the current change in motor speed.

[0113] Preferred, such as Figure 4 As shown, in this embodiment of the invention, it may further include:

[0114] Speed ​​command unit 04 is used to generate a speed control command for the pumping unit inverter of the regulating pumping unit according to a second preset algorithm when it is determined from the output information data that the power grid is experiencing short-term or medium-term fluctuations; the second preset algorithm includes:

[0115] A second correspondence is pre-generated between the change in the pumping fluid volume and the change in the power consumption of the regulating pumping unit;

[0116] Based on the current fluctuation amplitude of the short-term or medium-term fluctuation of the power grid, calculate the current power regulation amplitude of the power consumed by the regulating pumping unit;

[0117] The change in the current pumping fluid volume of the regulating pumping unit is determined based on the current power adjustment amplitude and the second correspondence.

[0118] The rotational speed control command is generated based on the current change in the pumped oil volume.

[0119] Because the working principle and beneficial effects of the power grid regulating device for the oil pumping unit in the embodiments of the present invention have already been demonstrated... Figure 1 The corresponding methods for regulating the power grid used in the oil pumping unit are also described and explained, so they can be referred to each other, and will not be repeated here.

[0120] Example 4

[0121] Corresponding to the method embodiments, this application also provides a regulating device for the power grid of an oil pumping unit, such as a terminal or server. The server can be a standalone physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server providing basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, CDN, and big data and artificial intelligence platforms. The terminal can be a smartphone, tablet, laptop, desktop computer, etc., but is not limited to these.

[0122] An example diagram of the hardware structure block diagram of the power grid regulation device for an oil pumping unit provided in this embodiment of the invention is shown below. Figure 5 As shown, it may include:

[0123] Processor 1, communication interface 2, memory 3, and communication bus 4;

[0124] The processor 1, communication interface 2, and memory 3 communicate with each other via communication bus 4.

[0125] Optionally, communication interface 2 can be an interface of a communication module, such as the interface of a GSM module;

[0126] Processor 1 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention.

[0127] Memory 3 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0128] Specifically, processor 1 is used to execute the computer program stored in memory 3 to perform the following steps:

[0129] S11. Set the operating point of the adjustable pumping unit to a non-optimal stroke rate; the non-optimal stroke rate is lower than the optimal stroke rate.

[0130] S12. Real-time acquisition of generator output information data from the power grid;

[0131] S13. When it is determined that the power grid experiences instantaneous fluctuations based on the output information data, a frequency control command for the pumping unit inverter of the regulating pumping unit is generated according to a first preset algorithm; the first preset algorithm includes:

[0132] A first correspondence is pre-generated between the change in the rotational speed of the motor of the regulating pumping unit and the change in the electrical energy generated by the reverse generator of the motor of the regulating pumping unit;

[0133] Based on the current fluctuation amplitude of the instantaneous fluctuation in the power grid, calculate the current power regulation amplitude of the reverse power generation of the regulating pumping unit motor;

[0134] The current speed change of the motor is determined based on the current power regulation amplitude and the first correspondence.

[0135] The frequency control command is generated based on the current change in motor speed.

[0136] Preferably, in embodiments of the present invention, it may further include:

[0137] S14. When it is determined from the output information data that the power grid experiences short-term or medium-term fluctuations, a speed control command for the pumping unit inverter of the regulating pumping unit is generated according to a second preset algorithm; the second preset algorithm includes:

[0138] A second correspondence is pre-generated between the change in the pumping fluid volume and the change in the power consumption of the regulating pumping unit;

[0139] Based on the current fluctuation amplitude of the short-term or medium-term fluctuation of the power grid, calculate the current power regulation amplitude of the power consumed by the regulating pumping unit;

[0140] The change in the current pumping fluid volume of the regulating pumping unit is determined based on the current power adjustment amplitude and the second correspondence.

[0141] The rotational speed control command is generated based on the current change in the pumped oil volume.

[0142] The power grid regulation device for the oil pumping unit in this embodiment of the invention, when the program instructions included in its computer program product are executed by a computer, can enable the computer to execute the power grid regulation method for the oil pumping unit described in the above aspects and achieve the same technical effect.

[0143] Example 5

[0144] In this embodiment of the invention, a storage medium is also provided, which can store a program suitable for execution by a processor, the program being used for:

[0145] S11. Set the operating point of the adjustable pumping unit to a non-optimal stroke rate; the non-optimal stroke rate is lower than the optimal stroke rate.

[0146] S12. Real-time acquisition of generator output information data from the power grid;

[0147] S13. When it is determined that the power grid experiences instantaneous fluctuations based on the output information data, a frequency control command for the pumping unit inverter of the regulating pumping unit is generated according to a first preset algorithm; the first preset algorithm includes:

[0148] A first correspondence is pre-generated between the change in the rotational speed of the motor of the regulating pumping unit and the change in the electrical energy generated by the reverse generator of the motor of the regulating pumping unit;

[0149] Based on the current fluctuation amplitude of the instantaneous fluctuation in the power grid, calculate the current power regulation amplitude of the reverse power generation of the regulating pumping unit motor;

[0150] The current speed change of the motor is determined based on the current power regulation amplitude and the first correspondence.

[0151] The frequency control command is generated based on the current change in motor speed.

[0152] Preferably, in embodiments of the present invention, it may further include:

[0153] S14. When it is determined from the output information data that the power grid experiences short-term or medium-term fluctuations, a speed control command for the pumping unit inverter of the regulating pumping unit is generated according to a second preset algorithm; the second preset algorithm includes:

[0154] A second correspondence is pre-generated between the change in the pumping fluid volume and the change in the power consumption of the regulating pumping unit;

[0155] Based on the current fluctuation amplitude of the short-term or medium-term fluctuation of the power grid, calculate the current power regulation amplitude of the power consumed by the regulating pumping unit;

[0156] The change in the current pumping fluid volume of the regulating pumping unit is determined based on the current power adjustment amplitude and the second correspondence.

[0157] The rotational speed control command is generated based on the current change in the pumped oil volume.

[0158] Optionally, the refined and extended functions of the program can be found in the description above.

[0159] The above-described product can execute the method provided in the embodiments of the present invention, and has the corresponding functional modules and beneficial effects for executing the method. Technical details not described in detail in this embodiment can be found in the method provided in the embodiments of the present invention.

[0160] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0161] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. Furthermore, the couplings or direct couplings or communication connections shown or discussed may be indirect couplings or communication connections through interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0162] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0163] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0164] It should be understood that in the embodiments of this application, the claims, various embodiments, and features can be combined with each other to solve the aforementioned technical problems.

[0165] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0166] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for regulating the power grid of a pumping unit, characterized in that, The method comprises the steps of: S11, setting the working point of the adjustable pumping unit at a non-optimal stroke value; the non-optimal stroke value is lower than the optimal stroke value; S12, acquiring the output information data of the generator of the power grid in real time; S13, when it is determined that the power grid has instantaneous fluctuation according to the output information data, generating a frequency control instruction of the pumping unit frequency converter of the adjustable pumping unit according to a first preset algorithm; the first preset algorithm comprises: pre-generating a first corresponding relationship between the speed variation of the motor of the adjustable pumping unit and the power variation of the reverse power generation of the motor of the adjustable pumping unit; calculating the current power adjustment amplitude of the reverse power generation of the motor of the adjustable pumping unit according to the current fluctuation amplitude of the instantaneous fluctuation of the power grid; determining the current speed variation of the motor according to the current power adjustment amplitude and the first corresponding relationship; generating the frequency control instruction according to the current motor speed variation; S14, when it is determined that the power grid has short-term fluctuation or medium-term fluctuation according to the output information data, generating a speed control instruction of the pumping unit speed of the adjustable pumping unit according to a second preset algorithm; the speed control instruction is used to control the speed of the motor of the adjustable pumping unit; the second preset algorithm comprises: pre-generating a second corresponding relationship between the pumping liquid variation of the adjustable pumping unit and the power variation; calculating the current power adjustment amplitude of the power consumption of the adjustable pumping unit according to the current fluctuation amplitude of the short-term fluctuation or medium-term fluctuation of the power grid; determining the current pumping liquid variation of the adjustable pumping unit according to the current power adjustment amplitude and the second corresponding relationship; generating the speed control instruction according to the current pumping liquid variation.

2. The power grid adjustment method for pumping unit according to claim 1, wherein: the adjustable pumping unit comprises a plurality of pumping units, and the upstroke and downstroke of the plurality of pumping units are consistent.

3. The method of regulating the power grid for a pumping unit of claim 1, wherein, The frequency adjustment range of the pumping unit frequency converter comprises: a region in which the frequency-power characteristic of the adjustable pumping unit is approximately a straight line.

4. The power grid adjustment method for pumping unit according to claim 1, wherein: the pumping unit frequency converter comprises a four-quadrant frequency converter.

5. The method of regulating the power grid for a pumping unit of claim 1, wherein, The step of setting the working point of the adjustable pumping unit at a non-optimal stroke value comprises: the non-optimal stroke value is set to be 80%-90% of the optimal stroke value.

6. A regulating device for the power grid of a pumping unit, characterized in that The method comprises: a stroke setting unit configured to set the working point of the adjustable pumping unit at a non-optimal stroke value; the non-optimal stroke value is lower than the optimal stroke value; a monitoring unit configured to acquire the output information data of the generator of the power grid in real time; a frequency instruction unit configured to, when it is determined that the power grid has instantaneous fluctuation according to the output information data, generate a frequency control instruction of the pumping unit frequency converter of the adjustable pumping unit according to a first preset algorithm; the first preset algorithm comprises: pre-generating a first corresponding relationship between the speed variation of the motor of the adjustable pumping unit and the power variation of the reverse power generation of the motor of the adjustable pumping unit; According to a current fluctuation amplitude of the transient fluctuation of the power grid, a current electric energy adjustment amplitude of the reverse power generation of the adjustment type pumping unit motor is calculated; According to the current electric energy adjustment amplitude and the first corresponding relationship, a current motor speed variation of the motor is determined; According to the current motor speed variation, the frequency control instruction is generated; A speed instruction unit is configured to, when it is determined according to the output information data that the power grid has short-term fluctuation or medium-term fluctuation, generate a speed control instruction of a pumping unit frequency converter of the adjustment type pumping unit according to a second preset algorithm; the speed control instruction is used to control the speed of the motor of the adjustment type pumping unit; the second preset algorithm comprises: A second corresponding relationship between a pumping liquid variation of the adjustment type pumping unit and a consumed power variation is generated in advance; According to a current fluctuation amplitude of the short-term fluctuation or the medium-term fluctuation of the power grid, a current power adjustment amplitude of the consumed power of the adjustment type pumping unit is calculated; According to the current power adjustment amplitude and the second corresponding relationship, a current pumping liquid variation of the adjustment type pumping unit is determined; According to the current pumping liquid variation, the speed control instruction is generated.

7. A regulating device for a power grid of a pumping unit, comprising: a memory for storing a computer program; a processor for calling and executing the computer program to realize each step of the regulating method for the power grid of the pumping unit according to any one of claims 1-5.

8. A storage medium having a computer program stored thereon, the computer program, when executed by a processor, realizes each step of the regulating method for the power grid of the pumping unit according to any one of claims 1-5.

Images