Current transformer step response rise time control method, apparatus and device

Abstract

The application relates to a current transformer step response rise time control method and device, computer equipment, a storage medium and a computer program product. The method comprises the following steps: obtaining an initial filter integration time of a sliding average filter before a target current transformer increases a polarization-maintaining optical cable; the sliding average filter is used for filtering noise of data information in an optical path of the target current transformer; the filter integration time of the sliding average filter is in a positive correlation relationship with a step response rise time of the target current transformer; obtaining a first optical path transit time of the target current transformer after the polarization-maintaining optical cable is added, and obtaining first order information of the sliding average filter based on the initial filter integration time and the first optical path transit time; and the first order information is used for controlling the step response rise time of the target current transformer. The method can effectively control the step response rise time of the target current transformer.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flexible direct current transmission, in particular to a current transformer step response rise time control method and device, computer equipment, storage medium and computer program product. BACKGROUND

[0002] With the development of the technical field of flexible direct current transmission, a flexible direct current transmission current measurement technology appears, which measures the current size of the flexible direct current transmission system through an all-fiber current transformer.

[0003] In the above technical solution, after the addition of the polarization maintaining optical cable to the all-fiber current transformer, the optical path transit time is increased, thereby causing the step response rise time of the all-fiber current transformer to increase, which does not meet the requirement of the flexible direct current transmission system on the fast response of the measurement device. Therefore, a method for controlling the step response rise time is needed. SUMMARY

[0004] Therefore, it is necessary to provide a current transformer step response rise time control method, device, computer equipment, computer readable storage medium and computer program product capable of effectively controlling the step response rise time of the current transformer in view of the above technical problems.

[0005] In a first aspect, the present application provides a current transformer step response rise time control method. The method comprises:

[0006] obtaining an initial filter integration time of a moving average filter before a target current transformer adds a polarization maintaining optical cable; the moving average filter is used for noise filtering of data information in an optical path of the target current transformer; the filter integration time of the moving average filter is in a positive correlation with the step response rise time of the target current transformer;

[0007] obtaining a first optical path transit time of the target current transformer after adding the polarization maintaining optical cable, and obtaining first order information of the moving average filter based on the initial filter integration time and the first optical path transit time;

[0008] controlling the step response rise time of the target current transformer by using the first order information.

[0009] In one of the embodiments, the obtaining the initial filter integration time of the moving average filter before the target current transformer adds the polarization-maintaining optical cable comprises: obtaining a second optical path transit time of the target current transformer before the target current transformer adds the polarization-maintaining optical cable, and second order information of the moving average filter before the target current transformer adds the polarization-maintaining optical cable; obtaining a product of the second optical path transit time and the second order information; and taking the product as the initial filter integration time.

[0010] In one of the embodiments, the obtaining the first order information of the moving average filter based on the initial filter integration time and the first optical path transit time comprises: obtaining a ratio between the initial filter integration time and the first optical path transit time; and obtaining the first order information of the moving average filter based on the ratio.

[0011] In one of the embodiments, the controlling the step response rise time of the target current transformer by using the first order information comprises: changing the order information of the moving average filter from the second order information to the first order information after the target current transformer adds the polarization-maintaining optical cable; and the first order information is used to control the step response rise time of the target current transformer after the target current transformer adds the polarization-maintaining optical cable to be consistent with the step response rise time of the target current transformer before the target current transformer adds the polarization-maintaining optical cable.

[0012] In one of the embodiments, after the order information of the moving average filter is changed from the second order information to the first order information, the method further comprises: obtaining current data of a flexible direct current power transmission system by the target current transformer after the target current transformer adds the polarization-maintaining optical cable; the target current transformer is used to measure the current data of the flexible direct current power transmission system; and generating power transmission safety alarm information if the current data is greater than or equal to a preset value.

[0013] In one of the embodiments, before the obtaining the second optical path transit time of the target current transformer before the target current transformer adds the polarization-maintaining optical cable, the method further comprises: obtaining an initial optical path transit time of the target current transformer before the target current transformer adds the polarization-maintaining optical cable; and correcting the initial optical path transit time to obtain the second optical path transit time.

[0014] In a second aspect, the application further provides a current transformer step response rise time control device.

[0015] The device comprises:

[0016] An integral time acquisition module is configured to acquire an initial filter integral time of a moving average filter before a target current transformer is added with a polarization maintaining optical cable; the moving average filter is configured to filter noise of data information in an optical path of the target current transformer; the filter integral time of the moving average filter is in positive correlation with a step response rise time of the target current transformer;

[0017] A first order information acquisition module is configured to acquire a first optical path transit time of the target current transformer after the target current transformer is added with the polarization maintaining optical cable, and to acquire first order information of the moving average filter based on the initial filter integral time and the first optical path transit time;

[0018] A rise time control module is configured to control the step response rise time of the target current transformer by using the first order information.

[0019] In a third aspect, the present application further provides a computer device. The computer device comprises a memory and a processor, the memory stores a computer program, and the processor implements the following steps when executing the computer program:

[0020] An integral time acquisition module is configured to acquire an initial filter integral time of a moving average filter before a target current transformer is added with a polarization maintaining optical cable; the moving average filter is configured to filter noise of data information in an optical path of the target current transformer; the filter integral time of the moving average filter is in positive correlation with a step response rise time of the target current transformer;

[0021] A first order information acquisition module is configured to acquire a first optical path transit time of the target current transformer after the target current transformer is added with the polarization maintaining optical cable, and to acquire first order information of the moving average filter based on the initial filter integral time and the first optical path transit time;

[0022] A rise time control module is configured to control the step response rise time of the target current transformer by using the first order information.

[0023] In a fourth aspect, the present application further provides a computer readable storage medium. The computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the following steps:

[0024] An integral time acquisition module is configured to acquire an initial filter integral time of a moving average filter before a target current transformer is added with a polarization maintaining optical cable; the moving average filter is configured to filter noise of data information in an optical path of the target current transformer; the filter integral time of the moving average filter is in positive correlation with a step response rise time of the target current transformer;

[0025] obtain first order information of the sliding average filter based on the initial filter integration time and the first optical path transit time of the target current transformer after the polarization maintaining optical cable is added;

[0026] control the step response rise time of the target current transformer by using the first order information.

[0027] In a fifth aspect, the present application further provides a computer program product. The computer program product comprises a computer program which, when executed by a processor, implements the following steps:

[0028] obtain an initial filter integration time of a sliding average filter before a target current transformer adds a polarization maintaining optical cable; the sliding average filter is used for filtering noise of data information in an optical path of the target current transformer; the filter integration time of the sliding average filter is in a positive correlation with a step response rise time of the target current transformer;

[0029] obtain a first optical path transit time of the target current transformer after the polarization maintaining optical cable is added, and obtain first order information of the sliding average filter based on the initial filter integration time and the first optical path transit time;

[0030] control the step response rise time of the target current transformer by using the first order information.

[0031] The current transformer step response rise time control method, device, computer device, storage medium and computer program product, by obtaining an initial filter integration time of a sliding average filter before a target current transformer adds a polarization maintaining optical cable; the sliding average filter is used for filtering noise of data information in an optical path of the target current transformer; the filter integration time of the sliding average filter is in a positive correlation with a step response rise time of the target current transformer; a first optical path transit time of the target current transformer after the polarization maintaining optical cable is added is obtained, and first order information of the sliding average filter is obtained based on the initial filter integration time and the first optical path transit time; the step response rise time of the target current transformer is controlled by using the first order information. The present application can effectively control the step response rise time of the target current transformer by changing the order information of the sliding average filter after the polarization maintaining optical cable is added to the target current transformer. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 a flowchart of a current transformer step response rise time control method in one embodiment;

[0033] Figure 2A flowchart of a process for obtaining an initial filter integration time in an embodiment;

[0034] Figure 3 A flowchart of a process for obtaining first order information in an embodiment;

[0035] Figure 4 A block diagram of a structure of a current transformer step response rise time control device in an embodiment;

[0036] Figure 5 An internal structure diagram of a computer device in an embodiment. DETAILED DESCRIPTION

[0037] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0038] It should be noted that the terms "first" and "second" involved in the embodiments of the present application are only to distinguish similar objects, and do not represent a specific order of the objects. Understandably, "first" and "second" can be interchanged in a specific order or sequence as allowed. It should be understood that the objects distinguished by "first" and "second" can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0039] In an embodiment, as shown in Figure 1 A current transformer step response rise time control method is provided. The embodiment illustrates the method applied to a terminal. It should be understood that the method can also be applied to a server, and can also be applied to a system including a terminal and a server, and can be implemented through the interaction of the terminal and the server. In the embodiment, the method includes the following steps:

[0040] In step S101, an initial filter integration time of a moving average filter before a target current transformer is added with a polarization maintaining optical cable is obtained. The moving average filter is used to filter noise of data information in an optical path of the target current transformer. The filter integration time of the moving average filter is in a positive correlation with a step response rise time of the target current transformer.

[0041] The target current transformer is an all-optical fiber current transformer, which is used to measure direct current and alternating current at the same time, has a large measurement range, high measurement accuracy, no magnetic saturation, fast response speed, strong anti-electromagnetic interference ability, and simple and reliable insulation structure, and is an important primary equipment in the flexible direct current transmission system, which provides accurate and reliable measurement information for the control and protection of the system. The moving average filter is an M-order moving average filter, which means that a data buffer area is established in the RAM first, M sample data are stored in sequence, and the oldest data is discarded every time a new data is collected, and then the arithmetic mean or weighted mean of the M data including the new data is calculated. In this way, a new average value can be calculated every time a sample is taken, thereby speeding up the data processing. The moving average filter is used to filter noise of the data information in the optical path of the target current transformer. The polarization maintaining optical cable refers to a long distance polarization maintaining optical cable, which is used to transmit linearly polarized light. The polarization maintaining optical cable is arranged in the underground cable trench between the high voltage field and the control room, and transmits optical signals back and forth. Laying the polarization maintaining optical cable will increase the step response rise time of the target current transformer. Then, the initial filter integration time refers to the total integration time of the window length of the moving average filter before the target current transformer increases the polarization maintaining optical cable. Finally, the step response rise time is a key indicator for measuring the response speed of the target current transformer. The filter integration time of the moving average filter and the step response rise time of the target current transformer are in a positive correlation.

[0042] Specifically, the initial filter integration time of the moving average filter before the target current transformer increases the polarization maintaining optical cable is obtained by testing the optical path transit time of the moving average filter before the target current transformer increases the polarization maintaining optical cable.

[0043] In step S102, the first optical path transit time of the target current transformer after increasing the polarization maintaining optical cable is obtained, and based on the initial filter integration time and the first optical path transit time, the first order information of the moving average filter is obtained.

[0044] The first optical path transit time is the round-trip transmission time of the polarized light signal of the target current transformer after increasing the polarization maintaining optical cable, and the first order information is the order of the moving average filter corresponding to the first optical path transit time.

[0045] Specifically, the first optical path transit time of the target current transformer after increasing the polarization maintaining optical cable is obtained by testing, and the first order information of the moving average filter is calculated based on the initial filter integration time and the first optical path transit time through a pre-set calculation formula.

[0046] Step S103, controlling the step response rise time of the target current transformer by using the first order information.

[0047] Specifically, the step response rise time of the target current transformer after adding the polarization-maintaining optical cable is controlled to be consistent with the step response rise time of the target current transformer before adding the polarization-maintaining optical cable by using the first order information.

[0048] In the current transformer step response rise time control method, an initial filter integration time of a moving average filter before the target current transformer adds the polarization-maintaining optical cable is obtained; the moving average filter is used for noise filtering of data information in an optical path of the target current transformer; the filter integration time of the moving average filter is in a positive correlation with the step response rise time of the target current transformer; a first optical path transit time of the target current transformer after adding the polarization-maintaining optical cable is obtained, and first order information of the moving average filter is obtained based on the initial filter integration time and the first optical path transit time; and the step response rise time of the target current transformer is controlled by using the first order information. By changing the order information of the moving average filter after the target current transformer adds the polarization-maintaining optical cable, the step response rise time of the target current transformer can be effectively controlled.

[0049] In one embodiment, as shown in Figure 2 obtaining the initial filter integration time of the moving average filter before the target current transformer adds the polarization-maintaining optical cable includes the following steps:

[0050] Step S201, obtaining a second optical path transit time of the target current transformer before adding the polarization-maintaining optical cable and second order information of the moving average filter before the target current transformer adds the polarization-maintaining optical cable.

[0051] The second optical path transit time is a round-trip transmission time of a polarized light signal of the target current transformer before adding the polarization-maintaining optical cable, and the second order information is an order of the moving average filter corresponding to the second optical path transit time.

[0052] Specifically, the second optical path transit time of the target current transformer before adding the polarization-maintaining optical cable is obtained by testing, and the second order information of the moving average filter before the target current transformer adds the polarization-maintaining optical cable is read.

[0053] Step S202, obtaining a product of the second optical path transit time and the second order information.

[0054] The product is a result of multiplication of the second optical path transit time and the second order information.

[0055] Specifically, the product of the second optical path transit time and the second order information is calculated.

[0056] Step S203, taking the product as an initial filter integration time.

[0057] Specifically, the product represents the initial filter integration time.

[0058] In this embodiment, by taking the product of the second optical path transit time and the second order information, the initial filter integration time can be accurately obtained.

[0059] In one embodiment, as shown in Figure 3 Based on the initial filter integration time and the first optical path transit time, the first order information of the sliding average filter is obtained, including the following steps:

[0060] Step S301, obtaining a ratio between the initial filter integration time and the first optical path transit time.

[0061] The ratio is the result of dividing the initial filter integration time by the first optical path transit time.

[0062] Specifically, the ratio between the initial filter integration time and the first optical path transit time is calculated.

[0063] Step S302, obtaining the first order information of the sliding average filter based on the ratio.

[0064] Specifically, the ratio is rounded down to obtain the rounded ratio, which is the first order information of the sliding average filter.

[0065] In this embodiment, by calculating the ratio between the initial filter integration time and the first optical path transit time, the first order information of the sliding average filter can be accurately obtained.

[0066] In one embodiment, the first order information is used to control the step response rise time of the target current transformer, including the following steps:

[0067] After the target current transformer is added with the polarization-maintaining optical cable, the order information of the sliding average filter is changed from the second order information to the first order information; the first order information is used to control the step response rise time of the target current transformer after the polarization-maintaining optical cable is added, which is consistent with the step response rise time before the polarization-maintaining optical cable is added.

[0068] Specifically, after the target current transformer is added with the polarization-maintaining optical cable, the order information of the sliding average filter is changed from the second order information to the first order information, so that the step response rise time before and after the polarization-maintaining optical cable is added is consistent.

[0069] In this embodiment, by changing the order information of the moving average filter from the second order information to the first order information, the first order information can be effectively controlled to control the step response rise time of the target current transformer after adding the polarization maintaining optical cable, which is consistent with the step response rise time before adding the polarization maintaining optical cable.

[0070] In one embodiment, after changing the order information of the moving average filter from the second order information to the first order information, the following steps are further included:

[0071] After the target current transformer adds the polarization maintaining optical cable, the current data of the flexible DC power transmission system is obtained through the target current transformer; the target current transformer is used to measure the current data of the flexible DC power transmission system; if the current data is greater than or equal to a preset value, power transmission safety warning information is generated.

[0072] The flexible DC power transmission system is a new generation of DC power transmission system, which is similar in structure to the high-voltage DC power transmission system and is still composed of converter stations and DC transmission lines. It is a new type of power transmission system based on voltage source converters, self-turn-off devices and pulse width modulation technology. The flexible DC power transmission system has the advantages of being able to supply power to passive networks, not causing commutation failure, not requiring communication between converter stations, and being easy to form a multi-terminal DC system. The flexible DC power transmission system will be rapidly developed and applied in the future in terms of large-scale new energy consumption, offshore wind power DC access, multi-terminal flexible DC and DC power grid, long-distance high-capacity overhead line flexible DC power transmission, flexible DC distribution network and island power transmission, etc. The current data is the size of the transmission current of the above-mentioned flexible DC power transmission system. As for the power transmission safety warning information, it is the corresponding warning information when the above-mentioned flexible DC power transmission system has an operation anomaly.

[0073] Specifically, after the target current transformer is laid with the polarization maintaining optical cable, the current data of the flexible DC power transmission system is read in real time through the target current transformer, and if the current data is greater than or equal to a preset threshold, corresponding power transmission safety warning information is generated.

[0074] In this embodiment, by judging whether the current data of the flexible DC power transmission system is greater than or equal to a preset threshold, the corresponding power transmission safety warning information can be accurately obtained.

[0075] In one embodiment, before obtaining the second optical path transit time of the target current transformer before adding the polarization maintaining optical cable, the following steps are further included:

[0076] The initial optical path transit time of the target current transformer before adding the polarization maintaining optical cable is obtained; the initial optical path transit time is corrected to obtain the second optical path transit time.

[0077] The initial optical path transit time is uncorrected initial data corresponding to the second optical path transit time.

[0078] Specifically, the initial optical path transit time is corrected by a preset correction model to obtain the second optical path transit time.

[0079] In the embodiment, the initial optical path transit time is corrected to accurately obtain the second optical path transit time.

[0080] In one application embodiment, a current transformer step response rise time control method is provided, including the following steps:

[0081] According to the step response rise time requirement of the engineering requirement, the appropriate filter order M1 is adjusted, and whether the step response rise time meets the requirement is tested by the step response test system. If it meets the requirement, the optical path transit time T1 and the sliding average filter order M1 at this time are recorded, and the filter integration time M1 T1 is recorded. After the product is laid with optical cable in the field, the new optical path transit time T2 is tested. The new filter order M2 is calculated, M2=M1 T1 / T2, and is rounded down. The filter order is modified to M2, and the control of the step response rise time of the current transformer is completed.

[0082] The filter integration time determines the step response rise time of the all-fiber current transformer, and the principle is described as follows: according to the working principle and characteristics of the sliding average filter, the original sampling value of the closed loop FOCT is output by M-order smoothing. Although the noise of the original sampling value is effectively reduced, the filter integration time is increased by the increase of the optical path transit time T and the order M. The filter output is the average value of all original sampling values in the integration time. When M sampling values in the integration time are all step values, the filter output is a step value, that is, the filter integration time determines the step response rise time.

[0083] In order to study the influence of the optical path transit time, filter order and filter integration time on the rise time of the closed-loop FOCT step response, the system model is simplified, the gains of each link are normalized, and the influence of the high-order characteristics of the photodetector, preamplifier and modulator driving circuit is not considered. The step response rise time of the M-order sliding filter under different orders and different transit times is simulated. The simulation results are as follows: when the optical path transit time T is 2 μs, the filter order M is 10, 20 and 40, the rise time is 18 μs, 36 μs and 72 μs respectively; when the filter order M is 20, the optical path transit time τ is 2 μs, 3 μs and 4 μs, the rise time is 36 μs, 54 μs and 72 μs respectively. The simulation results show that increasing the sliding average filter order M or the optical path transit time T will increase the rise time of the closed-loop FOCT step response, resulting in a decrease in the step response characteristics, which is consistent with the theoretical analysis. In addition, when the optical path transit time T and the filter order M are 2, 40 and 4, 20 respectively, the rise time of the step response is 72 μs, that is, when the product of the optical path transit time T and the filter order M is constant, the rise time of the step response is the same.

[0084] The step response rise time of the optical path transit time of 2 μs, 5 μs and 10 μs is simulated when MT is set to 100 μs. The simulation results are as follows: as long as the product of MT is kept constant, the rise time of the closed-loop FOCT step response under different optical path transit times is the same. Therefore, when the closed-loop FOCT is laid in the field with long distance polarization maintaining optical cable, resulting in the increase of the optical path transit time τ, the filter order M can be reduced by the filter integration time MT to keep the step response characteristics consistent with those when it leaves the factory. Since the number of sampling values of the high-speed AD to the detector is the same under the condition of the same total integration time, reducing the sliding average filter order to compensate for the increase of the optical path transit time has no influence on the steady-state measurement performance of the closed-loop FOCT.

[0085] The FOCT with a rated current of 1000 A is selected as the test sample. The light path transit time of the test sample is 1.3 μs measured by the host computer debugging software. The order of the sliding average filter is set to 77, and the MT is approximately equal to 100 μs. The step response test and the DC accuracy test are performed on the test sample. The polarization maintaining optical fiber between the test sample sensing ring and the acquisition unit is disconnected and is spliced with a 300 m polarization maintaining optical cable. The modulation frequency is adjusted by the debugging software, and the light path transit time is 4.6 μs. The order of the sliding average filter is changed to 22, and the step response test and the DC accuracy test are performed on the test sample. The step response rise time and the DC current measurement error before and after the long distance polarization maintaining optical cable is added are compared. The test results show that the step rise times of the test sample before and after the polarization maintaining optical cable is added are 96.9 μs and 98.8 μs, respectively, which are basically the same, that is, the step response rise time remains consistent. The main reasons for the existence of certain errors are that the filter order M can only be set to an integer, and the light path transit time has a decimal and is an approximate value. Under the premise that the total integral time MT of the filter remains unchanged, adding the polarization maintaining optical cable does not affect the DC current measurement accuracy of the closed-loop FOCT. The test results are consistent with the simulation conclusion.

[0086] In this embodiment, by changing the order information of the sliding average filter after the polarization maintaining optical cable is added to the target current transformer, the step response rise time of the target current transformer can be effectively controlled.

[0087] It should be understood that, although each step in the flowchart involved in each of the above-described embodiments is displayed in sequence according to the arrow, these steps are not necessarily executed in sequence according to the arrow. Unless otherwise specified herein, the execution of these steps is not strictly limited in sequence, and these steps can be executed in other sequences. Moreover, at least part of the steps in the flowchart involved in each of the above-described embodiments can include multiple steps or stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution sequence of these steps or stages is not necessarily sequential, but can be executed in rotation or alternation with at least part of other steps or stages or steps or stages in other steps.

[0088] Based on the same inventive concept, the embodiments of the present application also provide a current transformer step response rise time control device for implementing the above-mentioned current transformer step response rise time control method. The problem-solving implementation scheme provided by the device is similar to the implementation scheme described in the above method, and therefore the specific limitations in one or more current transformer step response rise time control device embodiments provided below can refer to the limitations of the current transformer step response rise time control method described above, which will not be repeated here.

[0089] In one embodiment, asFigure 4 As shown, a current transformer step response rise time control device is provided, comprising: an integral time acquisition module 401, a first order information acquisition module 402, and a rise time control module 403, wherein:

[0090] The integral time acquisition module 401 is configured to acquire an initial filter integral time of a sliding average filter before a target current transformer adds a polarization maintaining optical cable; the sliding average filter is configured to filter noise of data information in an optical path of the target current transformer; the filter integral time of the sliding average filter is in a positive correlation with a step response rise time of the target current transformer;

[0091] The first order information acquisition module 402 is configured to acquire a first optical path transit time of the target current transformer after the target current transformer adds the polarization maintaining optical cable, and acquire first order information of the sliding average filter based on the initial filter integral time and the first optical path transit time;

[0092] The rise time control module 403 is configured to control the step response rise time of the target current transformer by using the first order information.

[0093] In one embodiment, the integral time acquisition module 401 is further configured to acquire a second optical path transit time of the target current transformer before the target current transformer adds the polarization maintaining optical cable, and acquire second order information of the sliding average filter before the target current transformer adds the polarization maintaining optical cable; acquire a product of the second optical path transit time and the second order information; and take the product as the initial filter integral time.

[0094] In one embodiment, the first order information acquisition module 402 is further configured to acquire a ratio between the initial filter integral time and the first optical path transit time; and acquire the first order information of the sliding average filter based on the ratio.

[0095] In one embodiment, the rise time control module 403 is further configured to change the order information of the sliding average filter from second order information to first order information after the target current transformer adds the polarization maintaining optical cable; the first order information is used to control the step response rise time of the target current transformer after the target current transformer adds the polarization maintaining optical cable, and the step response rise time is consistent with the step response rise time before the target current transformer adds the polarization maintaining optical cable.

[0096] In one embodiment, the rise time control module 403 is further configured to acquire current data of a flexible direct current power transmission system through the target current transformer after the target current transformer adds the polarization maintaining optical cable; the target current transformer is configured to measure the current data of the flexible direct current power transmission system; and if the current data is greater than or equal to a preset value, power transmission safety warning information is generated.

[0097] In one of the embodiments, the first order information acquisition module 402 is further configured to acquire an initial optical path transit time of the target current transformer before the polarization maintaining optical cable is added; and correct the initial optical path transit time to obtain a second optical path transit time.

[0098] The modules in the current transformer step response rise time control device can be implemented by software, hardware, or a combination thereof. The modules can be embedded in or independent of a processor in a computer device in hardware form, or stored in a memory in the computer device in software form, so as to be called and executed by the processor to perform the operations corresponding to the modules.

[0099] In one embodiment, a computer device is provided, which can be a terminal, and an internal structure diagram of the computer device can be as shown in Figure 5 The computer device includes a processor, a memory, a communication interface, a display screen, and an input device connected through a system bus. The processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operating system and the computer program in the non-volatile storage medium to run. The communication interface of the computer device is configured to perform wired or wireless communication with an external terminal. The wireless communication can be achieved through WIFI, mobile cellular network, NFC (near field communication), or other technologies. The computer program is executed by the processor to implement a current transformer step response rise time control method. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen. The input device of the computer device can be a touch layer overlaid on the display screen, or a key, trackball, or touchpad arranged on the shell of the computer device, or an external keyboard, touchpad, or mouse, etc.

[0100] Those skilled in the art can understand that Figure 5 The structure shown in the above

[0101] In one embodiment, a computer device is provided, which can be a terminal, and an internal structure diagram of the computer device can be as shown in

[0102] In one embodiment, a computer readable storage medium is provided, which stores a computer program. The computer program is executed by a processor to implement the steps in the above method embodiments.

[0103] In an embodiment, a computer program product is provided including a computer program which, when executed by a processor, implements the steps of any of the above method embodiments.

[0104] It should be noted that the user information (including but not limited to user equipment information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in the present application are all information and data authorized by the user or authorized by all parties.

[0105] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be completed by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer readable storage medium. When the computer program is executed, it can include the processes of the above-mentioned embodiments. Any reference to memory, database or other medium used in the embodiments provided by the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration but not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The database involved in the embodiments provided by the present application can include at least one of a relational database and a non-relational database. The non-relational database can include a distributed database based on a block chain, etc., without being limited thereto. The processor involved in the embodiments provided by the present application can be a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., without being limited thereto.

[0106] Any technical features in the above embodiments can be combined, and for the sake of brevity, not all possible combinations are described above, however, as long as the combinations do not conflict with each other, they should be construed to be within the scope of the present disclosure.

[0107] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A current transformer step response rise time control method, characterized by, The method comprises: acquiring an initial filter integration time of a moving average filter before a target current transformer adds a polarization maintaining optical cable; the moving average filter is used for filtering noise of data information in an optical path of the target current transformer; a filter integration time of the moving average filter is in a positive correlation with a step response rise time of the target current transformer; acquiring a first optical path transit time of the target current transformer after adding the polarization maintaining optical cable, and obtaining first order information of the moving average filter based on the initial filter integration time and the first optical path transit time; controlling the step response rise time of the target current transformer by using the first order information; the acquiring of the initial filter integration time of the moving average filter before the target current transformer adds the polarization maintaining optical cable comprises: acquiring a second optical path transit time of the target current transformer before adding the polarization maintaining optical cable, and second order information of the moving average filter before the target current transformer adds the polarization maintaining optical cable; acquiring a product of the second optical path transit time and the second order information; taking the product as the initial filter integration time.

2. The method of claim 1, wherein, the obtaining of the first order information of the moving average filter based on the initial filter integration time and the first optical path transit time comprises: acquiring a ratio between the initial filter integration time and the first optical path transit time; obtaining the first order information of the moving average filter based on the ratio.

3. The method of claim 2, wherein, the controlling of the step response rise time of the target current transformer by using the first order information comprises: after the target current transformer adds the polarization maintaining optical cable, changing the order information of the moving average filter from the second order information to the first order information; the first order information is used for controlling the step response rise time of the target current transformer after adding the polarization maintaining optical cable to be consistent with the step response rise time of the target current transformer before adding the polarization maintaining optical cable.

4. The method of claim 3, wherein, after the changing of the order information of the moving average filter from the second order information to the first order information, the method further comprises: after the target current transformer adds the polarization maintaining optical cable, acquiring current data of a flexible direct current power transmission system through the target current transformer; the target current transformer is used for measuring the current data of the flexible direct current power transmission system; if the current data is greater than or equal to a preset value, generating power transmission safety alarm information.

5. The method of claim 1, wherein, before the acquiring of the second optical path transit time of the target current transformer before adding the polarization maintaining optical cable, the method further comprises: acquiring an initial optical path transit time of the target current transformer before adding the polarization maintaining optical cable; correcting the initial optical path transit time to obtain the second optical path transit time.

6. A current transformer step response rise time control device characterized by, the device comprises: The integral time acquisition module is configured to acquire an initial filter integral time of a sliding average filter before a target current transformer is added with a polarization-maintaining optical cable; the sliding average filter is configured to filter noise of data information in an optical path of the target current transformer; the filter integral time of the sliding average filter is in a positive correlation with a step response rise time of the target current transformer; The first order information acquisition module is configured to acquire a first optical path transit time of the target current transformer after the polarization-maintaining optical cable is added, and to obtain first order information of the sliding average filter based on the initial filter integral time and the first optical path transit time; The rise time control module is configured to control the step response rise time of the target current transformer by using the first order information. The integral time acquisition module is further configured to acquire a second optical path transit time of the target current transformer before the polarization-maintaining optical cable is added, and to acquire second order information of the sliding average filter before the target current transformer is added with the polarization-maintaining optical cable; to acquire a product of the second optical path transit time and the second order information; and to take the product as the initial filter integral time. 7.A computer device, comprising a memory and a processor, wherein the memory stores a computer program, and the computer device is configured to perform the method according to any one of claims 1-6 when the computer program is executed by the processor. The computer program is executed by the processor to implement the steps of the method in any one of claims 1 to 5.

8. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to implement the steps of the method in any one of claims 1 to 5.

9. A computer program product comprising a computer program, characterized in that, The computer program is executed by the processor to implement the steps of the method in any one of claims 1 to 5.

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