A method, apparatus, device and medium for calculating a switching time of a DCS system

Abstract

The application discloses a method and device for calculating switching time of a DCS system, equipment and a medium, and is applied to the field of DCS system control. The method provided by the application comprises the following steps: acquiring a first power signal sent by an external signal source to a DCS controller; acquiring a second power signal obtained by processing the first power signal by the DCS controller; and comparing the first power signal with the second power signal to determine the switching time of the DCS system. The application uses the comparison result of the first power signal provided by the external signal source and the second power signal processed by the DCS controller as the switching time of the DCS system, that is, two output signals are used, and the change trend of the two output signals is calculated, so that the switching time of the DCS system can be obtained more accurately, and the error is reduced. Meanwhile, the method for calculating the switching time of the DCS system provided by the application has a wide application range.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of DCS system control, and particularly relates to a method and device for calculating switching time of a DCS system, equipment and a medium. BACKGROUND

[0002] With the development of DCS systems (Distributed Control System) in thermal power plants, it is generally considered that when the controller switches, the network switches and the power supply system switches in the three tests of "controller switching fault-tolerant test", "network redundancy switching test" and "power supply system switching test" in the DCS system, the DCS running suspension time is not more than 3 running cycles of the DCS system, and if it exceeds, it is considered unqualified. Therefore, there is a high precision requirement for the time from the stop running of the DCS system to the recovery running of the system when the controller, network and power supply of the DCS system switch, and the more accurate data can more reliably evaluate the DCS performance.

[0003] In recent years, whether it is "controller switching fault-tolerant test", "network redundancy switching test" or "power supply system switching test" in thermal power plants, the output signal is used to determine the suspension time in the switching process, and a single output signal is used for judgment, so there will be errors in the process of judging the suspension time. Specifically, "controller switching fault-tolerant test" uses the original voltage or current in the controller to judge the suspension time of the corresponding system. When the voltage or current disappears, it is judged that the controller is out of operation, and when the voltage or current returns to normal, it is judged that the controller resumes operation. However, this method cannot be generally applied to DCS systems because the current controller of the current DCS system is generally plug-in and is directly installed on the installation board. The installation board is an integrated circuit, and it is difficult to directly measure the original current or voltage in the controller, and it is difficult to operate. Therefore, this method is difficult to implement in the actual application of thermal power plants, and there are errors.

[0004] In view of the above-mentioned technology, it is an urgent problem for those skilled in the art to seek a method for calculating the switching time of a DCS control system. SUMMARY

[0005] The purpose of the present application is to provide a method, device, equipment and medium for calculating the switching time of a DCS system. The present application uses two output signals and calculates the change trend of the two output signals, and can obtain a more accurate DCS system switching time.

[0006] To solve the above technical problems, the present application provides a method for calculating the switching time of a DCS system, comprising:

[0007] obtaining a first power signal sent by an external signal source to a DCS controller;

[0008] obtaining a second power signal obtained by processing the first power signal by the DCS controller;

[0009] comparing the first power signal with the second power signal to determine a switching time of the DCS system.

[0010] Preferably, the first power signal comprises:

[0011] a first current signal starting from a lower limit value of a current range corresponding to the DCS system and continuously increasing by a first preset value to an upper limit value of the current range;

[0012] when the current of the first current signal is the upper limit value of the current range, the current of the first current signal is restored to the lower limit value of the current range.

[0013] Preferably, the first power signal comprises:

[0014] a first voltage signal starting from a lower limit value of a voltage range corresponding to the DCS system and continuously increasing by a second preset value to an upper limit value of the voltage range;

[0015] when the voltage of the first voltage signal is the upper limit value of the voltage range, the voltage of the first voltage signal is restored to the lower limit value of the voltage range.

[0016] Preferably, obtaining the second power signal obtained by processing the first power signal by the DCS controller comprises:

[0017] the first power signal is sequentially processed by a first program, a logical relationship and a second program corresponding to the DCS controller to obtain the second power signal.

[0018] Preferably, comparing the first power signal with the second power signal to determine a switching time of the DCS system comprises:

[0019] obtaining a first waveform corresponding to the first power signal and a second waveform corresponding to the second power signal;

[0020] obtaining a time difference value corresponding to a position where the waveforms of the second waveform and the first waveform are different;

[0021] the time difference value is taken as the switching time of the DCS system.

[0022] Preferably, it further comprises:

[0023] if the second waveform is the same as the first waveform, the DCS system is working normally.

[0024] Preferably, it further comprises:

[0025] the period of the first power signal is not greater than the period of the DCS controller.

[0026] To solve the above problems, the application further provides a device for calculating switching time of a DCS system, comprising:

[0027] a first acquisition module, configured to acquire a first power signal sent by an external signal source to a DCS controller;

[0028] a second acquisition module, configured to acquire a second power signal obtained by processing the first power signal by the DCS controller;

[0029] a determination module, configured to compare the first power signal with the second power signal, and determine the switching time of the DCS system.

[0030] To solve the above problems, the application further provides an electronic device, comprising a memory for storing a computer program;

[0031] a processor, configured to execute the computer program to implement the steps of the method for calculating switching time of a DCS system.

[0032] To solve the above problems, the application further provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the steps of the method for calculating switching time of a DCS system.

[0033] The method for calculating switching time of a DCS system provided by the application comprises the following steps: acquiring a first power signal sent by an external signal source to a DCS controller; acquiring a second power signal obtained by processing the first power signal by the DCS controller; comparing the first power signal with the second power signal, and determining the switching time of the DCS system. The application uses the comparison result of the first power signal provided by the external signal source and the second power signal processed by the DCS controller as the switching time of the DCS system, that is, two output signals are used, and the change trend of the two output signals is calculated, so that a more accurate DCS system switching time can be obtained, and the error is reduced. Meanwhile, the method for calculating switching time of a DCS system provided by the application has a wide range of application.

[0034] BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the application, the drawings needed in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0036] Figure 1 The principle diagram corresponding to the prior art method for calculating switching time of a DCS system provided by the application;

[0037] Figure 2 The test data schematic diagram of the controller switching fault-tolerant test in the prior art provided for the embodiments of the present application;

[0038] Figure 3 The test data schematic diagram of the network redundancy switching test in the prior art provided for the embodiments of the present application;

[0039] Figure 4 The flow chart of the method for calculating the switching time of the DCS system provided for the embodiments of the present application;

[0040] Figure 5 The principle diagram corresponding to the method for calculating the switching time of the DCS system provided for the embodiments of the present application;

[0041] Figure 6 The first power signal schematic diagram provided for the embodiments of the present application;

[0042] Figure 7 The comparison schematic diagram of the first waveform diagram and the second waveform diagram provided for the embodiments of the present application;

[0043] Figure 8 The device module diagram of the method for calculating the switching time of the DCS system provided for another embodiment of the present application;

[0044] Figure 9 The structural diagram of the electronic device provided for another embodiment of the present application. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0046] The core of the present application is to provide a method, device, equipment and medium for calculating the switching time of a DCS system.

[0047] In order to enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0048] In the controller switching fault-tolerant test in the DCS system, the switching fault-tolerant capability of the redundant controller in the module cabinet is checked, that is, a running controller in a control station is artificially turned off (turning off methods: pulling out the controller, power off, setting module failure, stopping module running, etc.), and the standby controller should automatically work, the controller switching time is tested, whether the system is faulty or dead in the controller switching process is checked, and the test principle is shown inFigure 1 The corresponding test data is shown in Figure 2 The switching time in the DCS system controller is 7955.84ms-6384.16ms=1571.68ms, Figure 2 The switching time in the DCS system controller is a straight line, and it is not intuitive to feed back when to switch and when to resume operation.

[0049] Similarly, in the network redundancy switching test in the DCS system, the network redundancy switching capability is checked, that is, a running network module in a control station is manually turned off (turn-off method: pull out the network module network cable or turn off the network module power supply or the switch power supply), the standby network module should automatically work, the network module switching time is tested, whether the system has an error or a dead machine phenomenon in the network module switching process is checked, and the switching test record is made, and the test principle is shown in Figure 1 The corresponding test data is shown in Figure 3 The network switching time is 13750.56ms-12636.48ms=1114.08ms, Figure 3 The switching time in the DCS system controller is a relatively wide waveform, the upper graph also does not change greatly, and it cannot be accurately judged when to start switching and when to resume operation.

[0050] In view of the above problems, the application provides a method for accurately calculating the switching time of a DCS system, as shown in Figure 4 The method for calculating the switching time of the DCS system provided in the embodiment of the application is shown in the flowchart, and the method comprises the following steps: Figure 4 The method for calculating the switching time of the DCS system provided in the embodiment of the application is shown in the flowchart, and the method comprises the following steps:

[0051] S10: Obtain a first power signal sent by an external signal source to a DCS controller.

[0052] In specific embodiments, the first power signal sent by the external signal source to the corresponding DCS controller in the DCS system can be a current signal or a voltage signal, which is not limited by the application and can be set by the user as needed.

[0053] It should be noted that the first power signal sent by the external signal source to the DCS controller can be continuously sent without interruption or can be sent at a fixed time, which can be set by the user as needed.

[0054] The DCS controller includes a controller switching fault tolerance test and a corresponding controller for network redundancy switching test.

[0055] S11: Obtain a second power signal obtained by processing the first power signal by the DCS controller.

[0056] In specific embodiments, the DCS controller processes the first power signal to obtain the second power signal.

[0057] S12: comparing the first power signal with the second power signal to determine the switching time of the DCS system.

[0058] In specific embodiments, the first power signal and the second power signal are compared as two output signals. When the DCS system is normal, the DCS controller is fault-free, and there is no switching time. At this time, the second power signal is the same as the first power signal. When the DCS controller fails, the DCS system needs to switch the redundant device corresponding to the DCS controller to replace the DCS controller to realize the work of the DCS system. At this time, the second power signal is the first power signal after being processed by the DCS controller. When the DCS controller fails, the second power signal will change compared with the first power signal. Therefore, according to the difference between the first power signal and the second power signal, the switching time of the DCS system can be determined.

[0059] In the embodiments of the present application, as a preferred embodiment, the principle diagram of the method for calculating the switching time of the DCS system is shown in FIG. 2. Figure 5 In the embodiments of the present application, as a preferred embodiment, the principle diagram of the method for calculating the switching time of the DCS system is shown in FIG. 2.

[0060] The method for calculating the switching time of the DCS system provided by the present application comprises: obtaining the first power signal sent by the external signal source to the DCS controller; obtaining the second power signal obtained by processing the first power signal by the DCS controller; comparing the first power signal with the second power signal to determine the switching time of the DCS system. The present application uses the comparison result of the first power signal provided by the external signal source and the second power signal processed by the DCS controller as the switching time of the DCS system, that is, two output signals are used, and the change trend of the two output signals is calculated, so that a more accurate DCS system switching time can be obtained, and the error is reduced. At the same time, the method for calculating the switching time of the DCS system provided by the present application has a wide range of application.

[0061] In the above embodiments, as a preferred embodiment, the first power signal comprises:

[0062] a first current signal starting from the lower limit value of the current range corresponding to the DCS system and continuously increasing by a first preset value to the upper limit value of the current range;

[0063] when the current of the first current signal is the upper limit value of the current range, the current of the first current signal is restored to the lower limit value of the current range.

[0064] or starting from the lower limit value of the voltage range corresponding to the DCS system and continuously increasing to the upper limit value of the voltage range by the second preset value of the first voltage signal;

[0065] when the voltage of the first voltage signal is the upper limit value of the voltage range, the voltage of the first voltage signal is restored to the lower limit value of the voltage range.

[0066] In a specific embodiment, the first power signal needs to meet certain standard formats, which can improve the accuracy of finally determining the switching time of the DCS system. As a preferred embodiment, the first current signal starts from the lower limit value of the current range corresponding to the DCS system and continuously increases to the upper limit value of the current range by the first preset value. When the current of the first current signal is the upper limit value of the current range, the current of the first current signal is restored to the lower limit value of the current range. For example: the external signal source generates a current signal starting from 4mA and increasing by 2mA. The current signal will be restored to 4mA when it increases to 20mA. Repeat indefinitely, as shown in the following table: Figure 6 It should be noted that the specific values in the example are only one way to achieve, but not limited to only this way, which can be set by the user as needed.

[0067] Similarly, as a preferred embodiment, it can also be a voltage signal, that is, the first voltage signal starts from the lower limit value of the voltage range corresponding to the DCS system and continuously increases to the upper limit value of the voltage range by the second preset value. When the voltage of the first voltage signal is the upper limit value of the voltage range, the voltage of the first voltage signal is restored to the lower limit value of the voltage range. For example: the external signal source generates a voltage signal starting from 4V and increasing by 2V. The voltage signal will be restored to 4V when it increases to 20V. Repeat indefinitely. It should be noted that the specific values in the example are only one way to achieve, but not limited to only this way, which can be set by the user as needed.

[0068] It should be noted that when the first power signal is the first current signal, the corresponding second power signal is also the second current signal, and when the first power signal is the first voltage signal, the corresponding second power signal is also the second voltage signal.

[0069] The application provides a preferred standard format of the first power signal, which improves the accuracy of finally determining the switching time of the DCS system.

[0070] On the basis of the above embodiment, as a preferred embodiment, the second power signal obtained by processing the first power signal by the DCS controller comprises:

[0071] The first power signal is sequentially processed by the first program, the logical relationship and the second program of the DCS controller to obtain the second power signal.

[0072] Meanwhile, the period of the first power signal is not greater than the period of the DCS controller.

[0073] In a specific embodiment, the DCS controller includes the first program, the second program and the logical relationship connecting the two programs. The first power signal is sequentially processed by the first program, the logical relationship and the second program of the DCS controller to obtain the second power signal. The period of the first power signal is not greater than the period of the DCS controller, that is, the period of the first power signal is less than or equal to the period of the DCS controller. The period of the first signal source is less than or equal to the period of the DCS controller, which can more accurately detect the switching time.

[0074] As shown in the first current signal, the first program of the DCS controller is AI, and the second program is AO. Figure 5

[0075] On the basis of the above embodiment, as a preferred embodiment, the switching time of the DCS system is determined by comparing the first power signal with the second power signal, which includes:

[0076] Obtaining the first waveform corresponding to the first power signal and the second waveform corresponding to the second power signal;

[0077] Obtaining the time difference value corresponding to the position of the waveform difference between the second waveform and the first waveform;

[0078] The time difference value is taken as the switching time of the DCS system.

[0079] If the second waveform is the same as the first waveform, the DCS system works normally.

[0080] ​In specific embodiments, as a preferred, the switching time of the DCS system is determined according to the difference of the waveform diagram. Wherein, the first waveform diagram corresponding to the first power supply signal and the second waveform diagram corresponding to the second power supply signal are obtained; when the DCS system is normal, the DCS controller is fault-free, and there is no switching time, at this time, the second power supply signal is the same as the first power supply signal, that is, the waveform diagram corresponding to the first power supply signal is completely the same as the waveform diagram corresponding to the second power supply signal; when the DCS controller fails, the redundant device corresponding to the DCS controller needs to be switched to replace the DCS controller to realize the work of the DCS system, at this time, the second power supply signal is the first power supply signal after being processed by the DCS controller, when the DCS controller fails, the second power supply signal will change compared with the first power supply signal, that is, the second power supply signal will change when the DCS system switches, at this time, the time difference value corresponding to the position of the different waveforms in the second waveform diagram and the first waveform diagram is obtained; the time difference value is the switching time of the DCS system, as shown in Figure 7 , wherein, the present calculation switching time is the switching time of the DCS system determined by the method provided in the present application, and the original calculation switching time is the switching time of the DCS system calculated according to the prior art, as shown in the figure, it can be clearly found that there is a time difference value between the original calculation switching time and the present calculation switching time, therefore, the switching time of the DCS system determined by the method for calculating the switching time of the DCS system provided in the present application is more accurate.

[0081] The method for calculating the switching time of the DCS system provided in the present application comprises: obtaining the first power supply signal sent by the external signal source to the DCS controller; obtaining the second power supply signal obtained by processing the first power supply signal by the DCS controller; comparing the first power supply signal with the second power supply signal to determine the switching time of the DCS system. The present application uses the comparison result of the first power supply signal provided by the external signal source and the second power supply signal processed by the DCS controller as the switching time of the DCS system, that is, two output signals are used, and the change trend of the two output signals is calculated, so that the more accurate switching time of the DCS system can be obtained, and the error is reduced. At the same time, the method for calculating the switching time of the DCS system provided in the present application has a wide range of use.

[0082] In the above embodiment, a method for calculating the switching time of the DCS system is described in detail, and the present application also provides an embodiment of a device for calculating the switching time of the DCS system. It should be noted that the embodiment of the device part is described from two angles, one is based on the functional module, and the other is based on the hardware.

[0083] Figure 8 A device module diagram for calculating the switching time of the DCS system provided in another embodiment of the present application comprises:

[0084] The first obtaining module 11 is configured to obtain a first power signal sent by an external signal source to a DCS controller.

[0085] The second obtaining module 12 is configured to obtain a second power signal obtained by processing the first power signal by the DCS controller.

[0086] The determining module 13 is configured to compare the first power signal with the second power signal, and determine the switching time of the DCS system.

[0087] Since the embodiments of the device part correspond to the embodiments of the method part, the embodiments of the device part are described in the description of the embodiments of the method part, and are not described here.

[0088] Figure 9 The structure diagram of the electronic device provided in another embodiment of the present application is shown in FIG. 2. The electronic device includes a memory 20 configured to store a computer program. Figure 9

[0089] The processor 21 is configured to implement the steps of the method for calculating the switching time of the DCS system as mentioned in the above embodiments when executing the computer program.

[0090] The electronic device provided in the embodiment can include but is not limited to a smart phone, a tablet computer, a notebook computer, a desktop computer, etc.

[0091] The processor 21 can include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 21 can be implemented in at least one of a hardware form of a digital signal processor (DSP), a field-programmable gate array (FPGA), a programmable logic array (PLA). The processor 21 can also include a main processor and a coprocessor. The main processor is a processor for processing data in an awake state, also known as a central processing unit (CPU). The coprocessor is a low-power processor for processing data in a standby state. In some embodiments, the processor 21 can be integrated with a graphics processor (GPU) for rendering and drawing the content to be displayed by the display screen. In some embodiments, the processor 21 can also include an artificial intelligence (AI) processor for processing machine learning related computing operations.

[0092] ​The memory 20 can include one or more computer-readable storage media that can be non-transitory. The memory 20 can also include high-speed random access memory and nonvolatile, computer-readable storage media such as one or more magnetic disk storage devices, flash memory devices. In this embodiment, the memory 20 is at least used to store the following computer program 201, wherein the computer program is loaded and executed by the processor 21, and can realize the related steps of the method for calculating the switching time of the DCS system disclosed in any of the foregoing embodiments. In addition, the resources stored by the memory 20 can also include an operating system 202 and data 203, and the storage mode can be temporary storage or permanent storage. The operating system 202 can include Windows, Unix, Linux, etc.

[0093] In some embodiments, the electronic device can further include a display screen 22, an input / output interface 23, a communication interface 24, a power supply 25, and a communication bus 26.

[0094] Those skilled in the art can understand that the structure shown in the foregoing embodiments does not constitute a limitation on the electronic device, and the electronic device can include more or fewer components than those shown in the drawings. Figure 9

[0095] The electronic device provided by the embodiments of the present application includes a memory and a processor, and the processor can realize the following method when executing the program stored in the memory: a method for calculating the switching time of the DCS system.

[0096] Finally, the present application also provides an embodiment of a computer-readable storage medium. The computer-readable storage medium stores a computer program, and the computer program is executed by the processor to realize the steps recorded in the foregoing method embodiments.

[0097] It can be understood that if the method in the foregoing embodiments is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and executes all or part of the steps of the methods described in the embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0098] ​The above describes in detail a method and device for calculating a switching time of a DCS system, equipment and a medium. Each embodiment in the specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts of each embodiment can be understood by referring to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the related parts can be understood by referring to the method part. It should be pointed out that for ordinary skilled persons in the art, without departing from the principles of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the claims of the present application.

[0099] It should also be noted that in the present specification, the relationship 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 such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without further limitation, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or equipment including the element.

Claims

1. A method of calculating a switchover time for a DCS system, characterized by, The method comprises: obtaining a first power signal sent by an external signal source to a DCS controller, wherein a period of the first power signal is not greater than a period of the DCS controller; obtaining a second power signal obtained by processing the first power signal by the DCS controller; comparing the first power signal with the second power signal to determine a switching time of the DCS system; wherein the first power signal comprises a first current signal starting from a lower limit value of a current range corresponding to the DCS system and continuously increasing by a first preset value to an upper limit value of the current range, and when the current of the first current signal is the upper limit value of the current range, the current of the first current signal is restored to the lower limit value of the current range; or the first power signal comprises a first voltage signal starting from a lower limit value of a voltage range corresponding to the DCS system and continuously increasing by a second preset value to an upper limit value of the voltage range, and when the voltage of the first voltage signal is the upper limit value of the voltage range, the voltage of the first voltage signal is restored to the lower limit value of the voltage range. The method further comprises:

2. The method of claim 1, wherein, processing the first power signal through a first program, a logic relationship and a second program corresponding to the DCS controller in sequence to obtain the second power signal. The method further comprises:

3. The method of claim 1, wherein, obtaining a first waveform diagram corresponding to the first power signal and a second waveform diagram corresponding to the second power signal; obtaining a time difference value corresponding to a position where the waveforms of the second waveform diagram and the first waveform diagram are different; taking the time difference value as the switching time of the DCS system. The method further comprises:

4. The method of claim 3, wherein, if the second waveform diagram is the same as the first waveform diagram, the DCS system is working normally. The method comprises:

5. An apparatus for calculating a switchover time of a DCS system, characterized by comprising: a first obtaining module, configured to obtain a first power signal sent by an external signal source to a DCS controller, wherein a period of the first power signal is not greater than a period of the DCS controller; the first power signal comprises a first current signal starting from a lower limit value of a current range corresponding to the DCS system and continuously increasing by a first preset value to an upper limit value of the current range, and when the current of the first current signal is the upper limit value of the current range, the current of the first current signal is restored to the lower limit value of the current range; or the first power signal comprises a first voltage signal starting from a lower limit value of a voltage range corresponding to the DCS system and continuously increasing by a second preset value to an upper limit value of the voltage range, and when the voltage of the first voltage signal is the upper limit value of the voltage range, the voltage of the first voltage signal is restored to the lower limit value of the voltage range; a second obtaining module, configured to obtain a second power signal obtained by processing the first power signal by the DCS controller; ​ determining module configured to determine a switching time of the DCS system by comparing the first power supply signal with the second power supply signal.

6. An electronic device, comprising: The computer program is stored in the computer readable storage medium. The processor is configured to implement the steps of the method for calculating the switching time of the DCS system according to any one of claims 1 to 4 when executing the computer program.

7. A computer readable storage medium characterized in that, The computer program is stored in the computer readable storage medium. The processor is configured to implement the steps of the method for calculating the switching time of the DCS system according to any one of claims 1 to 4 when executing the computer program.

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