阅读说明：本技术 一种变频驱动系统、变频驱动系统的控制方法及存储介质 (Variable frequency driving system, control method of variable frequency driving system and storage medium ) 是由 张志朋 付俊鹏 孙家军 于 2021-02-26 设计创作，主要内容包括：本发明提供了一种变频驱动系统、变频驱动系统的控制方法及存储介质,所述变频驱动系统包括负载、整流单元、逆变组件、变压器、预充回路和旁通回路,所述变压器、所述整流单元、所述逆变组件和所述负载连通,所述预充回路与所述旁通回路并联设置,且所述预充回路和所述旁通回路均与所述变压器和高压电源连通。本发明的有益效果：能够降低高压合闸时对电网其他设备的影响。(The invention provides a variable frequency driving system, a control method of the variable frequency driving system and a storage medium, wherein the variable frequency driving system comprises a load, a rectifying unit, an inverter assembly, a transformer, a pre-charging loop and a bypass loop, the transformer, the rectifying unit, the inverter assembly and the load are communicated, the pre-charging loop and the bypass loop are arranged in parallel, and the pre-charging loop and the bypass loop are both communicated with the transformer and a high-voltage power supply. The invention has the beneficial effects that: the influence on other equipment of the power grid during high-voltage switching-on can be reduced.)

1. The variable-frequency driving system is characterized by comprising a load (10), a rectifying unit (6), an inverter assembly (9), a transformer, a pre-charging loop and a bypass loop, wherein the transformer, the rectifying unit (6), the inverter assembly (9) and the load (10) are communicated, the pre-charging loop and the bypass loop are arranged in parallel, and the pre-charging loop and the bypass loop are communicated with the transformer and a high-voltage power supply.

2. Variable frequency drive system according to claim 1, wherein the bypass circuit is provided with a bypass contactor (2) and the pre-charge circuit is provided with a pre-charge contactor (1) and a pre-charge resistor (3) in series.

3. The variable frequency drive system according to claim 2, further comprising a PLC controller and a voltage detection device communicatively connected to the PLC controller, wherein the rectification unit (6) is connected to the inverter assembly (9) through a dc bus (7), a capacitor (8) is disposed at the dc bus (7), the voltage detection device is adapted to detect a voltage of the dc bus (7), and the PLC controller is hard-wired to both the bypass contactor (2) and the pre-charging contactor (1).

4. The variable frequency drive system according to claim 3, further comprising an electrical platen, wherein the electrical platen is communicatively connected to the PLC controller, the electrical platen is disposed at the DC bus (7), and the electrical platen is adapted to detect a voltage signal at the DC bus (7) and feed back the voltage signal to the PLC controller.

5. The variable frequency drive system according to any one of claims 1 to 4, wherein the rectifier unit (6) is a three-phase full-bridge uncontrollable rectifier unit, the transformer comprises a primary winding (4) of a phase-shifting rectifier transformer and a secondary winding (5) of the phase-shifting rectifier transformer, which are electrically connected, and the secondary winding (5) of the phase-shifting rectifier transformer is electrically connected with the three-phase full-bridge uncontrollable rectifier unit.

6. The variable frequency drive system according to claim 5, wherein the transformer comprises at least two secondary windings (5) of the phase-shifting rectifier transformer, the number of the three-phase full-bridge uncontrollable rectifying units and the number of the secondary windings (5) of the phase-shifting rectifier transformer are the same, the load (10) is a six-phase variable frequency asynchronous motor, and one six-phase variable frequency asynchronous motor is connected with two inverter assemblies (9).

7. A method of controlling a variable frequency drive system, based on the variable frequency drive system according to any one of claims 1 to 6, the method comprising:

controlling a high-voltage power supply to pre-magnetize a transformer through a pre-charging loop of the variable-frequency driving system;

obtaining the voltage of a circuit between a rectifying unit (6) and an inversion component (9) of the variable-frequency driving system;

and when the voltage value reaches a preset voltage value, controlling the high-voltage power supply to supply power to the transformer through a bypass loop of the variable-frequency driving system.

8. The control method of the variable frequency drive system according to claim 7, wherein the variable frequency drive system further comprises a PLC controller and a voltage detection device in communication connection with the PLC controller, the pre-charging loop is provided with a pre-charging contactor (1) and a pre-charging resistor (3) in series, the rectifying unit (6) and the inverter assembly (9) are connected through a DC bus (7), a capacitor (8) is arranged at the DC bus (7), the voltage detection device is suitable for detecting the voltage of the DC bus (7), and the PLC controller is hard-wired with the pre-charging contactor (1);

the controlling the high-voltage power supply to pre-charge the transformer through a pre-charging loop of the variable-frequency driving system comprises the following steps:

and when the PLC receives a pre-charging closing signal, the pre-charging contactor (1) is controlled to be closed.

9. The control method of the variable frequency drive system according to claim 8, further comprising a voltage board disposed at the dc bus (7), the bypass circuit being provided with a bypass contactor (2), the PLC controller being hard-wired to the bypass contactor (2); the step of controlling the high-voltage power supply to supply power to the transformer through a bypass loop of the variable-frequency driving system comprises the following steps:

when the PLC receives the voltage of the direct current bus fed back by the voltage detection device and the voltage of the direct current bus reaches the preset voltage value, the bypass contactor (2) is controlled to be closed, and the pre-charging contactor (1) is controlled to be opened.

10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out a method of controlling a variable frequency drive system according to any one of claims 7 to 9.

Technical Field

The invention relates to the technical field of electricity, in particular to a variable frequency driving system, a control method of the variable frequency driving system and a storage medium.

Background

Because a high-capacity phase-shifting rectifier transformer is arranged in the existing high-power high-voltage frequency converter, direct switching-on is mainly adopted, and the direct high-voltage switching-on has larger impact on a power grid, and if excitation inrush current impact is generated, the normal operation of other equipment of the power grid is influenced.

Disclosure of Invention

The invention solves the problem of how to reduce the influence on other equipment of a power grid during high-voltage switching-on.

In order to solve the above problems, the present invention provides a variable frequency driving system, which includes a load, a rectifying unit, an inverting assembly, a transformer, a pre-charging loop and a bypass loop, wherein the transformer, the rectifying unit, the inverting assembly and the load are communicated, the pre-charging loop and the bypass loop are connected in parallel, and the pre-charging loop and the bypass loop are both communicated with the transformer and a high voltage power supply.

Furthermore, the bypass circuit is provided with a bypass contactor, and the pre-charging circuit is provided with a pre-charging contactor and a pre-charging resistor in series.

Further, the direct current bus type alternating current power supply further comprises a PLC controller and a voltage detection device in communication connection with the PLC controller, the rectification unit is connected with the inversion assembly through a direct current bus, a capacitor is arranged at the position of the direct current bus, the voltage detection device is suitable for detecting the voltage of the direct current bus, and the PLC controller is in hard-line connection with the bypass contactor and the pre-charging contactor.

Furthermore, the direct current bus voltage control device further comprises an electric pressure plate, the electric pressure plate is in communication connection with the PLC, the electric pressure plate is arranged at the direct current bus, and the electric pressure plate is suitable for detecting a voltage signal at the direct current bus and feeding back the voltage signal to the PLC.

Furthermore, the rectifier unit is a three-phase full-bridge uncontrollable rectifier unit, the transformer comprises a primary winding of a phase-shifting rectifier transformer and a secondary winding of the phase-shifting rectifier transformer which are electrically connected, and the secondary winding of the phase-shifting rectifier transformer is electrically connected with the three-phase full-bridge uncontrollable rectifier unit.

Furthermore, the transformer comprises at least two secondary windings of the phase-shifting rectifier transformer, the three-phase full-bridge uncontrollable rectifier units are the same as the secondary windings of the phase-shifting rectifier transformer in number, the load is a six-phase variable-frequency asynchronous motor, and one six-phase variable-frequency asynchronous motor is connected with two inverter components.

In the technical scheme, the high-voltage power supply pre-magnetizes the transformer through the pre-charging loop, after pre-charging is finished, the pre-charging loop can be bypassed by the bypass loop, the high-voltage power supply supplies power to the transformer through the bypass loop, pre-charging is carried out on the transformer through a pre-charging mode, grid connection under the high-voltage power supply is convenient to realize, the impact influence of excitation surge current during high-voltage switch-on is reduced, the malfunction of comprehensive protection of a superior high-voltage switch is reduced, the influence on equipment on the side of a power grid is avoided, the phase of low voltage and high voltage does not need to be checked, a low-voltage pre-charging winding does not need.

The invention also provides a control method of the variable frequency driving system, which is based on the variable frequency driving system, and comprises the following steps:

controlling a high-voltage power supply to pre-magnetize the transformer through a pre-charging loop of the variable-frequency driving system;

acquiring the voltage of a circuit between a rectifying unit and an inversion component of the variable frequency driving system;

and when the voltage value reaches a preset voltage value, controlling the high-voltage power supply to supply power to the transformer through a bypass loop of the variable-frequency driving system.

Furthermore, the variable frequency drive system further comprises a PLC controller and a voltage detection device in communication connection with the PLC controller, the pre-charging loop is provided with a pre-charging contactor and a pre-charging resistor in series, the rectifying unit is connected with the inverter assembly through a direct current bus, a capacitor is arranged at the position of the direct current bus, the voltage detection device is suitable for detecting the voltage of the direct current bus, and the PLC controller is in hard-line connection with the pre-charging contactor;

the controlling the high-voltage power supply to pre-charge the transformer through a pre-charging loop of the variable-frequency driving system comprises the following steps:

and when the PLC receives a pre-charging closing signal, the pre-charging contactor is controlled to be closed.

Furthermore, the variable frequency driving system also comprises a voltage plate, the voltage plate is arranged at the direct current bus, the bypass loop is provided with a bypass contactor, and the PLC is in hard-wire connection with the bypass contactor; the step of controlling the high-voltage power supply to supply power to the transformer through a bypass loop of the variable-frequency driving system comprises the following steps:

and when the PLC receives the voltage of the direct current bus fed back by the voltage detection device and the voltage of the direct current bus reaches the preset voltage value, controlling the bypass contactor to be closed.

The control method of the variable frequency drive system of the invention is similar to the beneficial effect of the variable frequency drive system compared with the prior art, and is not repeated herein.

The invention also proposes a computer-readable storage medium on which a computer program is stored which, when being executed by a processor, carries out a method of controlling a variable frequency drive system as described above.

The beneficial effects of the computer readable storage medium and the control method of the variable frequency drive system are similar to those of the prior art, and are not repeated herein.

Drawings

Fig. 1 is a schematic structural diagram of a variable frequency drive system according to an embodiment of the present invention.

Description of reference numerals:

1-pre-charging contactor; 2-pre-charging resistance; 3-a bypass contactor; 4-primary winding of phase-shifting rectifier transformer; 5-secondary winding of phase-shifting rectifier transformer; 6-a rectifying unit; 7-a direct current bus; 8-a capacitor; 9-an inverting component; 10-load.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

It is noted that the terms first, second and the like in the description and in the claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description herein, references to the terms "an embodiment," "one embodiment," and "one implementation," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or implementation is included in at least one embodiment or example implementation of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or implementation. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or implementations.

Referring to fig. 1, an embodiment of the present invention provides a variable frequency drive system, including a load 10, a rectifying unit 6, an inverter assembly 9, a transformer, a pre-charge circuit, and a bypass circuit, where the transformer, the rectifying unit 6, the inverter assembly 9, and the load 10 are communicated, the pre-charge circuit is connected in parallel with the bypass circuit, and both the pre-charge circuit and the bypass circuit are communicated with the transformer and a high-voltage power supply.

Because a high-capacity phase-shifting rectifier transformer is arranged in the existing high-power high-voltage frequency converter, direct switching-on is mainly adopted, and the direct high-voltage switching-on has larger impact on a power grid, and if excitation inrush current impact is generated, the normal operation of other equipment of the power grid is influenced. In the related art, a low-voltage pre-magnetizing mode is also adopted for switching on so as to switch on when a low-voltage power supply is input, but the low-voltage pre-magnetizing mode needs to check low-voltage and high-voltage phases, and meanwhile, a set of extra low-voltage pre-charging windings need to be added to a secondary side of a transformer, such as a phase-shifting rectifier transformer, so that the operation is troublesome and the cost is higher.

In the embodiment of the present invention, the variable frequency driving system includes a load 10, as shown in fig. 1, the load 10 may be a motor, and specifically may be a six-phase variable frequency asynchronous motor for a fractured dragging system, the transformer may be a phase-shifting rectifier transformer, and specifically includes a primary winding 4 of the phase-shifting rectifier transformer and a secondary winding 5 of the phase-shifting rectifier transformer, which are electrically connected, and the rectifier unit 6 may be a three-phase full-bridge uncontrollable rectifier unit composed of uncontrollable diodes, for which, the secondary winding 5 of the phase-shifting rectifier transformer is electrically connected to the three-phase full-bridge uncontrollable rectifier unit, each three-phase full-bridge uncontrollable rectifier unit is 6-pulse rectification, the inverter assembly 9 may be a three-level inverter assembly, one rectifier unit 6 is connected to one inverter assembly 9, two inverter assemblies 9 are connected to the six-phase variable frequency asynchronous motor, wherein the number of the inverter units in the inverter assembly 9 is 3 times the number, in this embodiment, the number of the inverter units in each inverter assembly 9 is 3, so as to perform variable-frequency power supply of the load 10. Wherein, also include precharging the return circuit and bypass circuit, precharging the return circuit and communicating with transformer and high-voltage power in parallel and all, as shown in figure 1, the high-voltage power can be the 10kV power, to this, the high-voltage power can flow to the transformer through precharging the return circuit or bypass circuit, wherein the high-voltage power precharges the transformer through precharging the return circuit, when precharging to a certain stage, for example reach certain precharging time, or precharge to reach certain voltage, can bypass the precharging return circuit through the bypass circuit, so that the high-voltage power supplies power to the transformer through the bypass circuit, in this technical scheme, precharging the transformer through precharging way facilitates the switch-on under the high-voltage power, so as to reduce the impact influence of excitation surge current when high-voltage switch-on, reduce the malfunction of the comprehensive protection of the high-voltage switch, avoid the side equipment of the electric network from being influenced, and can not need to check the phase place of low, and a low-voltage pre-charging winding is not required to be arranged at the transformer, so that the cost is saved, and the operation difficulty is reduced.

In an alternative embodiment of the invention, the bypass circuit is provided with a bypass contactor 2, and the pre-charging circuit is provided with a pre-charging contactor 1 and a pre-charging resistor 3 in series.

In this embodiment, the pre-charging circuit has a pre-charging contactor 1 and a pre-charging resistor 3 that are arranged in series, when the pre-charging contactor 1 is closed, the power supply pre-charges the transformer through the pre-charging resistor 3, the bypass circuit is provided with a bypass contactor 2, when the bypass contactor 2 is closed, the power supply supplies power to the transformer only through the bypass circuit, wherein the bypass contactor and the pre-charging contactor 1 can be hard-wired to a PLC controller, specifically, for example, a siemens S7-1200 series PLC, so as to implement remote logic control.

In an optional embodiment of the present invention, the present invention further includes a PLC controller and a voltage detection device communicatively connected to the PLC controller, the rectification unit 6 is connected to the inverter assembly 9 through a dc bus 7, a capacitor 8 is disposed at the dc bus 7, the voltage detection device is adapted to detect a voltage of the dc bus 7, and the PLC controller is hard-wired to both the bypass contactor 2 and the pre-charging contactor 1.

In this embodiment, the rectifying unit 6 is connected to the inverter assembly 9 through the dc bus 7, the capacitor 8 is disposed at the dc bus 7, and when the transformer supplies power to the rectifying unit 6, the rectifying module charges the capacitor 8 at the dc bus 7, so as to charge the dc bus 7, which is convenient for knowing the charging condition of the dc bus 7, specifically, the voltage detecting device is disposed at the dc bus 7, so as to know the charging condition of the dc bus 7, and further know the pre-charging condition of the variable frequency driving system, for example, when the dc bus 7 is charged, the voltage reaches a certain magnitude, so as to stop the pre-charging, so as to perform the pre-charging control conveniently. In the present embodiment, particularly, when the charging voltage reaches 90% of the rated voltage at the time of precharging, the impact on the grid side can be minimized. The PLC controller is arranged to be in communication connection with the bypass contactor 2 and the pre-charging contactor 1, so that the closing and opening control of the bypass contactor 2 and the pre-charging contactor 1 is facilitated.

In an optional embodiment of the present invention, the present invention further comprises an electric pressure plate, the electric pressure plate is communicatively connected with the PLC controller, the electric pressure plate is disposed at the dc bus 7, and the electric pressure plate is adapted to detect a voltage signal at the pre-charging loop and feed back the voltage signal to the PLC controller.

In this embodiment, the voltage detection circuit further includes a voltage plate, the voltage plate is disposed at the dc bus 7 to detect a voltage signal at the pre-charging circuit, and when the voltage signal is detected, the voltage signal can be fed back to the PLC controller, and to this end, the PLC controller recognizes that the pre-charging circuit is connected to the high-voltage power supply, so that the pre-charging contactor 1 can be controlled to be closed to perform pre-charging.

In an alternative embodiment of the present invention, the transformer includes at least two secondary windings 5 of the phase-shifting rectifier transformer, the number of the three-phase full-bridge uncontrollable rectification units is the same as the number of the secondary windings 5 of the phase-shifting rectifier transformer, the load 10 is a six-phase variable frequency asynchronous motor, and one six-phase variable frequency asynchronous motor is connected to two of the inverter assemblies 9.

In this embodiment, the load 10 is six-phase variable frequency asynchronous motor, and to this quantity of contravariant subassembly 9 be two, the transformer includes two secondary winding 5 of phase-shifting rectifier transformer, wherein, the quantity of contravariant unit is in the contravariant subassembly 9 3 times of the secondary winding 5 quantity of phase-shifting rectifier transformer, the quantity of contravariant unit is 3 in concrete every contravariant subassembly 9 in this embodiment to and the three-phase full-bridge uncontrollable rectification unit's that corresponds with two secondary winding 5 of phase-shifting rectifier transformer quantity of being connected is two, with this, three-phase electricity to six-phase variable frequency asynchronous motor after 2 contravariant subassemblies 9 invertions to supply power. In an optional embodiment of the present invention, the number of the six-phase variable frequency asynchronous motors is 2, and for the dragging system for fracturing described in this embodiment, two sets of frequency converters for controlling the six-phase variable frequency asynchronous motors are used to act on the container in the fracturing site, so as to increase the driving capacity and reduce the floor area of the container. Wherein, two contravariant subassemblies 9 are all connected to every six-phase frequency conversion asynchronous motor, and then connect 4 total three-phase full-bridge uncontrollable rectifier units, to this, the transformer has 4 secondary winding 5 of rectifier transformer that phase shift promptly, 4 secondary winding 5 of rectifier transformer that phase shift can be respectively for the phase shift angle of rectifier transformer primary winding 4 that phase shift: 30 °, 0 °, -15 °, to supply the respective rectifying units.

The control method of the variable frequency drive system according to another embodiment of the present invention is based on the variable frequency drive system, and the control method of the variable frequency drive system includes:

controlling a high-voltage power supply to pre-magnetize the transformer through a pre-charging loop of the variable-frequency driving system;

acquiring the voltage of a circuit between a rectifying unit 6 and an inversion component 9 of the variable frequency driving system;

and when the voltage value reaches a preset voltage value, controlling the high-voltage power supply to supply power to the transformer through a bypass loop of the variable-frequency driving system.

In this embodiment, when the variable frequency drive system starts to operate, the pre-charge circuit is used for pre-charging, specifically, the high-voltage power supply is pre-charged to the transformer through the pre-charge circuit, and at the same time, the voltage of the circuit between the rectifier unit 6 and the inverter assembly 9 is acquired, in this embodiment, the rectifier unit 6 is connected to the inverter assembly 9 through the dc bus 7, so that the voltage of the dc bus is acquired in real time, when the voltage value reaches the preset voltage value, the bypass circuit is controlled to bypass the pre-charge circuit, so that the high-voltage power supply supplies power to the transformer only through the bypass circuit, thereby realizing switching-on under high voltage, reducing excitation surge current, reducing malfunction of comprehensive protection of the upper-level high-voltage switch, and reducing influence on the equipment on the side of.

Wherein, the preset voltage value can be set to be 90% of the rated voltage value so as to reduce the impact on the network side to the maximum extent.

In an optional embodiment of the present invention, the variable frequency drive system further includes a PLC controller and a voltage detection device communicatively connected to the PLC controller, the pre-charging loop is provided with a pre-charging contactor 1 and a pre-charging resistor 3 in series, the rectification unit 6 is connected to the inverter assembly 9 through a dc bus, a capacitor 8 is disposed at the dc bus 7, the voltage detection device is adapted to detect a voltage of the dc bus 7, and the PLC controller is hard-wired to the pre-charging contactor 1;

the controlling the high-voltage power supply to pre-charge the transformer through a pre-charging loop of the variable-frequency driving system comprises the following steps:

when the PLC receives a voltage signal fed back by the voltage plate, the pre-charging contactor 1 is controlled to be closed;

in this embodiment, the capacitor 8 is disposed at the dc bus 7 for charging, the voltage detection device is disposed for detecting the voltage of the dc bus 7, the pre-charging contactor 1 and the pre-charging resistor 3 are disposed for pre-charging the transformer, wherein after the PLC controller receives the pre-charging closing instruction, the pre-charging contactor 1 is closed, and then the transformer is pre-charged, so as to achieve accurate control of the pre-charging.

In an optional embodiment of the present invention, the variable frequency drive system further includes a voltage board, the voltage board is disposed at the dc bus 7, the bypass circuit is provided with a bypass contactor 2, and the PLC controller is hard-wired to the bypass contactor 2; and the high-voltage power supply is controlled to supply power to the transformer through a bypass loop of the variable-frequency driving system.

And when the PLC receives the voltage of the direct current bus fed back by the voltage detection device and the voltage of the direct current bus reaches the preset voltage value, controlling the bypass contactor 2 to be closed.

In this embodiment, by setting the bypass contactor 2 at the bypass loop and hard-wired connecting with the PLC controller, the bypass of the bypass loop to the pre-charging loop is controlled by on-off of the bypass contactor 2, and then the power supply of the high voltage power supply to the transformer after the pre-charging is finished is controlled, wherein a voltage detection device is provided to detect the voltage of the dc bus, when the voltage reaches a preset voltage value, the PLC controller controls the bypass contactor 2 to be closed, so that the pre-charging is finished, and the power supply of the transformer is performed through the bypass loop. Therein, it can be appreciated that the pre-charging contactor 1 can be opened simultaneously when the bypass contactor 2 is closed.

A computer-readable storage medium of another embodiment of the invention has stored thereon a computer program which, when executed by a processor, implements the control method of a variable frequency drive system as described above.

The beneficial effects of the computer readable storage medium and the control method of the variable frequency drive system are similar to those of the prior art, and are not repeated herein.

Generally, computer instructions for carrying out the methods of the present invention may be carried using any combination of one or more computer-readable storage media. Non-transitory computer readable storage media may include any computer readable medium except for the signal itself, which is temporarily propagating.

A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + +, and conventional procedural programming languages, such as the "C" programming language or similar programming languages, and in particular may employ Python languages suitable for neural network computing and TensorFlow, PyTorch-based platform frameworks. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.