A double bus differential protection processing method, device and equipment

Abstract

The application provides a kind of double busbar bus differential protection processing method, device and equipment, method includes: obtaining the state information of bus coupler switch and the polarity requirement information of bus coupler current transformer;According to the polarity requirement information, obtain the input information in the function soft pressure plate of protection device;According to state information and input information, obtain the bus coupler current coefficient of each bus;According to the bus coupler current coefficient of each bus, obtain the small differential operating current of each bus;According to the small differential operating current of each bus and the preset setting value, control protection processing is carried out to each bus.The scheme of the application can realize the polarity self-adaptation of protection device, ensure the calculation accuracy of the small differential operating current of each bus, avoid the abnormal differential flow of protection device to alarm or even malfunction, without changing the secondary wiring mode of current transformer, reduce the workload of substation technical improvement, and improve the work safety and work efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of double busbar protection, in particular to a double busbar differential protection processing method, device and equipment. BACKGROUND

[0002] Currently, the polarity of the primary equipment current transformer needs to be considered for the bus differential protection of all double busbars in the 220kV and above substations, and the primary polarity of the bus tie current transformer needs to be set for the bus differential protection current transformer of all 220kV double busbar connections of various manufacturers, but the primary polarity end of the bus tie current transformer is set at bus A in some double busbar configuration substations, and the primary polarity end of the bus tie current transformer is set at bus B in some double busbar configuration substations.

[0003] Due to the fixed bus tie polarity of the bus differential protection of different manufacturers being at different busbars, when the protection device is replaced with the opposite polarity of the original protection device during the protection device modification process, the secondary polarity connection of the current transformer needs to be adjusted on site, and in general cases, the primary equipment is not powered off, and the secondary polarity of the current transformer needs to be modified on site under live conditions, which is very difficult and dangerous to modify the secondary polarity of the current transformer under live conditions, and there is a risk of open circuit of the secondary of the current transformer, and if the secondary polarity of the current transformer is not modified, abnormal differential current will be generated after the operation of the protection device, abnormal differential current alarm will occur during low load, and the protection device is prone to malfunction during high load, which affects normal operation. SUMMARY

[0004] The present application provides a double busbar differential protection processing method, device and equipment, which can realize polarity self-adaptation of the protection device by determining the input information in the function soft board of the protection device, ensure the calculation accuracy of the small differential operating current of each busbar, avoid the protection device from generating abnormal differential current and even malfunction, and does not need to change the secondary connection mode of the current transformer, thereby reducing the workload of the substation technical improvement work and improving the work safety and work efficiency.

[0005] To solve the above technical problems, the technical solutions of the present application are as follows:

[0006] A double busbar differential protection processing method, comprising:

[0007] obtaining state information of a bus tie switch and polarity requirement information of a bus tie current transformer;

[0008] obtaining input information in a function soft board of a protection device according to the polarity requirement information;

[0009] obtaining bus tie current coefficients of each busbar according to the state information and the input information;

[0010] obtaining small differential operating currents of each busbar according to the bus tie current coefficients of each busbar.

[0011] According to the differential current of each bus and a preset setting value, each bus is controlled and protected.

[0012] Optionally, the state information of the bus tie switch and the polarity requirement information of the bus tie current transformer are obtained, including:

[0013] According to the opening and closing state of the bus tie switch, the state information of the bus tie switch is obtained; wherein the state information includes split position state information and closed position state information;

[0014] According to the initial setting of the bus tie current transformer, the polarity requirement information of the bus tie current transformer is obtained; wherein the polarity requirement information includes consistent with the first bus polarity and consistent with the second bus polarity.

[0015] Optionally, according to the polarity requirement information, the input information in the function soft panel of the protection device is obtained, including:

[0016] The polarity requirement information is consistent with the first bus polarity, and the polarity principle item in the function soft panel of the protection device is set as the first bus input and the second bus exit as the first input information;

[0017] The polarity requirement information is consistent with the second bus polarity, and the polarity principle item in the function soft panel of the protection device is set as the first bus exit and the second bus input as the second input information.

[0018] Optionally, according to the state information and the input information, the bus tie current coefficient of each bus is obtained, including:

[0019] The state information is split position state information, the bus tie current coefficient of the first bus is a first value, and the bus tie current coefficient of the second bus is a first value;

[0020] The state information is closed position state information, the input information is the first input information, the bus tie current coefficient of the first bus is a second value, and the bus tie current coefficient of the second bus is a third value;

[0021] The state information is closed position state information, the input information is the second input information, the bus tie current coefficient of the first bus is a third value, and the bus tie current coefficient of the second bus is a second value; the second value and the third value are opposite.

[0022] Optionally, according to the bus tie current coefficient of each bus, the differential current of each bus is obtained, including:

[0023] By , the differential current of the first bus is obtained;

[0024] Wherein, a differential current of the first bus; a bus tie current coefficient of the first bus; , a current of other branches on the first bus; , a current coefficient of other branches on the first bus, which is a fixed constant.

[0025] Optionally, the differential current of each bus is obtained according to the bus tie current coefficient of each bus, and the method further comprises:

[0026] by obtaining a differential current of the second bus;

[0027] wherein, a differential current of the second bus; a bus tie current coefficient of the second bus; , a current of other branches on the second bus; , a current coefficient of other branches on the second bus, which is a fixed constant.

[0028] Optionally, each bus is controlled and protected according to the differential current of each bus and a preset setting value, and the method further comprises:

[0029] when the differential current of the first bus is greater than the preset setting value, the first bus is disconnected;

[0030] when the differential current of the second bus is greater than the preset setting value, the second bus is disconnected.

[0031] The application further provides a double-bus bus differential protection processing device, comprising:

[0032] an acquisition module, configured to acquire state information of a bus tie switch and polarity requirement information of a bus tie current transformer;

[0033] a processing module, configured to obtain input information in a function soft board of a protection device according to the polarity requirement information, obtain a bus tie current coefficient of each bus according to the state information and the input information, obtain a differential current of each bus according to the bus tie current coefficient of each bus, and control and protect each bus according to the differential current of each bus and a preset setting value.

[0034] The application further provides a computing device, comprising a processor and a memory storing a computer program, wherein the computer program is executed by the processor to perform the method described above.

[0035] The application further provides a computer readable storage medium, which stores instructions, and when the instructions are executed on a computer, the computer executes the method described above.

[0036] The above scheme of the application has at least the following beneficial effects:

[0037] The above scheme of the application has at least the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 is a flow chart of the double-busbar bus differential protection processing method provided by the embodiment of the application.

[0039] Figure 2 The module diagram of the double-busbar bus differential protection processing device provided by the embodiment of the application. DETAILED DESCRIPTION

[0040] Exemplary embodiments of the present application will be described herein below with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present application can be more thoroughly and completely understood, and the scope of the present application can be accurately conveyed to those skilled in the art.

[0041] As shown in Figure 1 The embodiment of the application proposes a double-busbar bus differential protection processing method, which comprises:

[0042] Step 11, obtaining state information of a bus tie switch and polarity requirement information of a bus tie current transformer;

[0043] Step 12, obtaining input information in a function soft panel of a protection device according to the polarity requirement information;

[0044] Step 13, obtaining bus tie current coefficients of each bus according to the state information and the input information;

[0045] Step 14, obtaining the small differential operating current of each bus according to the bus tie-in current coefficient of each bus;

[0046] Step 15, performing control protection processing on each bus according to the small differential operating current of each bus and a preset setting value.

[0047] In this embodiment, the state information of the bus tie-in switch and the polarity requirement information of the bus tie-in current transformer are obtained, the input information in the function soft board of the protection device is obtained according to the polarity requirement information, the bus tie-in current coefficient of each bus is obtained according to the state information and the input information, the small differential operating current of each bus is obtained according to the bus tie-in current coefficient of each bus, and the control protection processing on each bus is performed according to the small differential operating current of each bus and a preset setting value, so that the polarity self-adaptation of the protection device is realized, the calculation accuracy of the small differential operating current of each bus is ensured, the protection device is prevented from generating an abnormal differential current to alarm or even misoperate, the change of the secondary connection mode of the current transformer is not needed, the workload of the technical improvement of the substation is reduced, and the work safety and work efficiency are improved.

[0048] In an optional embodiment of the present application, step 11 comprises:

[0049] Step 111, obtaining the state information of the bus tie-in switch according to the opening and closing state of the bus tie-in switch, wherein the state information comprises split position state information and closed position state information.

[0050] Step 112, obtaining the polarity requirement information of the bus tie-in current transformer according to the initial setting of the bus tie-in current transformer, wherein the polarity requirement information comprises the same polarity as the first bus and the same polarity as the second bus.

[0051] In this embodiment, the state information of the bus tie-in switch is obtained according to the opening and closing state of the bus tie-in switch, and the state information can be split position state information and closed position state information, specifically, when the bus tie-in switch is in the split position, the state information is the split position state information, and when the bus tie-in switch is in the closed position, the state information is the closed position state information.

[0052] The initial setting of the bus tie-in current transformer is that the polarity of the bus tie-in current transformer is the same as the polarity of the first bus, and the polarity requirement information is the same as the polarity of the first bus.

[0053] The initial setting of the bus tie-in current transformer is that the polarity of the bus tie-in current transformer is the same as the polarity of the second bus, and the polarity requirement information is the same as the polarity of the second bus.

[0054] In an optional embodiment of the present application, step 12 comprises:

[0055] Step 121, the polarity requirement information is consistent with the first busbar polarity, and the polarity principle item in the function soft pad of the protection device is set as the first busbar input and the second busbar output as the first input information;

[0056] Step 122, the polarity requirement information is consistent with the second busbar polarity, and the polarity principle item in the function soft pad of the protection device is set as the first busbar output and the second busbar input as the second input information.

[0057] In this embodiment, the protection device is a bus differential protection device, and a bus tie current transformer polarity principle item is added in the device setting option function soft pad option of the protection device;

[0058] When the polarity requirement information is consistent with the first busbar polarity, the polarity principle item in the function soft pad of the protection device is set as the first busbar input and the second busbar output.

[0059] When the polarity requirement information is consistent with the second busbar polarity, the polarity principle item in the function soft pad of the protection device is set as the first busbar output and the second busbar input.

[0060] Through the above process, the protection device polarity can be self-adapted according to the polarity requirement information, the problem of inaccurate small differential operating current calculation caused by inconsistent protection device polarity is avoided, abnormal alarm or even misoperation of the protection device is avoided, and normal operation of the protection device is ensured.

[0061] In an optional embodiment of the application, step 13 comprises:

[0062] Step 131, the state information is split state information, the bus tie current coefficient of the first busbar is a first value, and the bus tie current coefficient of the second busbar is the first value.

[0063] Step 132, the state information is on state information, the input information is the first input information, the bus tie current coefficient of the first busbar is a second value, and the bus tie current coefficient of the second busbar is a third value.

[0064] Step 133, the state information is on state information, the input information is the second input information, the bus tie current coefficient of the first busbar is the third value, and the bus tie current coefficient of the second busbar is the second value; the second value and the third value are opposite.

[0065] In this embodiment, when the state information is split state information, that is, the bus tie switch is in a split state, the bus tie switch has no current, the bus tie current coefficient of the first busbar is a first value, and the bus tie current coefficient of the second busbar is the first value, wherein the first value can be 0.

[0066] When the state information is the closed state information, i.e. the bus tie switch is in the closed state and the bus tie switch has current; the input information is the first input information, i.e. the polarity principle item in the function soft panel of the protection device is the first bus input, the second bus output, the bus tie current coefficient of the first bus is the second value, and the bus tie current coefficient of the second bus is the third value, wherein the second value can be 1 and the third value can be -1;

[0067] When the state information is the closed state information, i.e. the bus tie switch is in the closed state and the bus tie switch has current; the input information is the first input information, i.e. the polarity principle item in the function soft panel of the protection device is the first bus input, the second bus output, the bus tie current coefficient of the first bus is the second value, and the bus tie current coefficient of the second bus is the third value, wherein the second value can be 1 and the third value can be -1;

[0068] Through the above process, the bus tie current coefficient of each bus can be obtained according to the state information and the input information, the calculation of the small differential operating current of each bus is facilitated according to the bus tie current coefficient of each bus, the accuracy of the calculation of the small differential operating current of each bus is ensured, abnormal alarm or even misoperation of the protection device is avoided, and normal operation of the protection device is ensured.

[0069] In an optional embodiment of the present application, step 14 comprises:

[0070] Step 141, the small differential operating current of the first bus is obtained through

[0071] wherein, represents the small differential operating current of the first bus; represents the bus tie current coefficient of the first bus; , represents the current of the other branch on the first bus; , represents the current coefficient of the other branch on the first bus, which is a fixed constant.

[0072] In this embodiment, the calculation of the small differential operating current of the first bus is performed through , which facilitates subsequent monitoring and control protection processing of the state of the first bus according to the small differential operating current of the first bus and the preset setting value.

[0073] In an optional embodiment of the present application, step 14 further comprises:

[0074] Step 142, the small differential operating current of the second bus is obtained through

[0075] wherein, ​​This represents the differential operating current of the second busbar; This represents the bus tie current coefficient of the second busbar; , This indicates the current in other branches on the second busbar; , This represents the current coefficient of other branches on the second busbar, which is a fixed constant.

[0076] In this embodiment, by The differential operating current of the second busbar is calculated to facilitate subsequent monitoring and control protection of the second busbar's status based on the differential operating current of the second busbar in conjunction with the preset setting value.

[0077] In an optional embodiment of the present invention, step 15 includes:

[0078] Step 151: When the differential operating current of the first busbar is greater than the preset setting value, disconnect the first busbar;

[0079] Step 152: When the differential operating current of the second busbar is greater than the preset setting value, disconnect the second busbar.

[0080] In this embodiment, when the differential operating current of the first busbar is less than the preset setting value, it indicates that the first busbar is operating safely; when the differential operating current of the first busbar is greater than the preset setting value, it indicates that there is an abnormality in the first busbar, and the first busbar is disconnected.

[0081] When the differential operating current of the second busbar is less than the preset setting value, it indicates that the second busbar is operating safely. When the differential operating current of the second busbar is greater than the preset setting value, it indicates that there is an abnormality in the second busbar, and the second busbar is disconnected.

[0082] The monitoring and control protection of the first and second busbars are carried out based on the differential operating current of the first busbar, the differential operating current of the second busbar, and the preset setting values. When an abnormality is found, the busbar with the abnormality is disconnected in time to ensure the safe operation of the first and second busbars.

[0083] The process for handling differential protection of double busbars is as follows:

[0084] The state information of the bus tie switch and the polarity requirement information of the bus tie current transformer are acquired; specifically, the state information of the bus tie switch is acquired according to the opening and closing state of the bus tie switch; when the bus tie switch is in the split position, the state information is split position state information; when the bus tie switch is in the closed position, the state information is closed position state information; the initial setting of the bus tie current transformer is that the polarity of the bus tie current transformer is consistent with the polarity of the first bus, and then the polarity requirement information is consistent with the polarity of the first bus; the initial setting of the bus tie current transformer is that the polarity of the bus tie current transformer is consistent with the polarity of the second bus, and then the polarity requirement information is consistent with the polarity of the second bus;

[0085] According to the polarity requirement information, the input information in the function soft panel of the protection device is obtained; specifically, when the polarity requirement information is consistent with the polarity of the first bus, the polarity principle item in the function soft panel of the protection device is set as first bus input and second bus output, as first input information; when the polarity requirement information is consistent with the polarity of the second bus, the polarity principle item in the function soft panel of the protection device is set as first bus output and second bus input, as second input information;

[0086] According to the state information and the input information, the bus tie current coefficients of each bus are obtained; specifically, when the state information is split position state information, i.e., the bus tie switch is in the split position state, the bus tie switch has no current, the bus tie current coefficient of the first bus is a first value, and the bus tie current coefficient of the second bus is the first value, where the first value can be 0; when the state information is closed position state information, i.e., the bus tie switch is in the closed position state, the bus tie switch has current; the input information is first input information, i.e., the polarity principle item in the function soft panel of the protection device is first bus input and second bus output, the bus tie current coefficient of the first bus is a second value, and the bus tie current coefficient of the second bus is a third value, where the second value can be 1 and the third value can be -1; when the state information is closed position state information, i.e., the bus tie switch is in the closed position state, the bus tie switch has current; the input information is second input information, i.e., the polarity principle item in the function soft panel of the protection device is first bus output and second bus input, the bus tie current coefficient of the first bus is the third value, and the bus tie current coefficient of the second bus is the second value, where the second value can be 1 and the third value can be -1;

[0087] According to the bus tie current coefficients of each bus, the small differential operating currents of each bus are obtained; specifically, the calculation of the small differential operating current of the first bus is performed through , and the calculation of the small differential operating current of the second bus is performed through .

[0088] According to the differential operating current of each bus and a preset setting value, control protection processing is performed on each bus; specifically, when the differential operating current of the first bus is less than the preset setting value, it indicates that the first bus is safe in operation, and when the differential operating current of the first bus is greater than the preset setting value, it indicates that the first bus is abnormal and the first bus is disconnected; when the differential operating current of the second bus is less than the preset setting value, it indicates that the second bus is safe in operation, and when the differential operating current of the second bus is greater than the preset setting value, it indicates that the second bus is abnormal and the second bus is disconnected.

[0089] Through the above process, the polarity principle item of the bus tie current transformer is added in the function soft pressure plate option of the device setting option of the protection device; according to the polarity requirement information, the input information in the function soft pressure plate of the protection device is obtained, the input of the first bus or the second bus is realized, and the polarity self-adaptation of the protection device is realized; according to the state information and the input information, the bus tie current coefficient of each bus is obtained, according to the bus tie current coefficient of each bus, the differential operating current of each bus is obtained, the calculation accuracy of the differential operating current of each bus is ensured, the protection device is prevented from generating abnormal differential current and alarming or even misoperation, the change of the secondary wiring mode of the current transformer is not needed, the workload of the technical transformation of the substation is reduced, and the work safety and work efficiency are improved.

[0090] As shown in Figure 2 The embodiment of the application also provides a double-bus differential protection processing device 20, which comprises:

[0091] An acquisition module 21 is configured to acquire state information of a bus tie switch and polarity requirement information of a bus tie current transformer;

[0092] A processing module 22 is configured to obtain input information in a function soft pressure plate of a protection device according to the polarity requirement information; obtain bus tie current coefficients of each bus according to the state information and the input information; obtain differential operating currents of each bus according to the bus tie current coefficients of each bus; and perform control protection processing on each bus according to the differential operating currents of each bus and a preset setting value.

[0093] Optionally, the state information of the bus tie switch and the polarity requirement information of the bus tie current transformer are acquired in the following manner:

[0094] The state information of the bus tie switch is acquired according to the opening and closing state of the bus tie switch; wherein the state information comprises split state information and closed state information;

[0095] The polarity requirement information of the bus tie current transformer is obtained according to the initial setting of the bus tie current transformer; wherein the polarity requirement information comprises consistency with the polarity of the first bus and consistency with the polarity of the second bus.

[0096] Optionally, according to the polarity requirement information, input information in a function soft panel of the protection device is obtained, including:

[0097] The polarity requirement information is consistent with the first busbar polarity, and a polarity principle item in the function soft panel of the protection device is set as the first busbar input and the second busbar output as the first input information.

[0098] The polarity requirement information is consistent with the second busbar polarity, and the polarity principle item in the function soft panel of the protection device is set as the first busbar output and the second busbar input as the second input information.

[0099] Optionally, according to the state information and the input information, busbar tie-in current coefficients of each busbar are obtained, including:

[0100] The state information is split state information, the busbar tie-in current coefficient of the first busbar is a first value, and the busbar tie-in current coefficient of the second busbar is the first value.

[0101] The state information is closed state information, the input information is the first input information, the busbar tie-in current coefficient of the first busbar is a second value, and the busbar tie-in current coefficient of the second busbar is a third value.

[0102] The state information is closed state information, the input information is the second input information, the busbar tie-in current coefficient of the first busbar is the third value, and the busbar tie-in current coefficient of the second busbar is the second value; and the second value and the third value are opposite.

[0103] Optionally, according to the busbar tie-in current coefficients of each busbar, small differential operating currents of each busbar are obtained, including:

[0104] The first busbar small differential operating current is obtained through

[0105] The first busbar small differential operating current is obtained through The first busbar small differential operating current is obtained through The first busbar small differential operating current is obtained through The first busbar small differential operating current is obtained through

[0106] Optionally, according to the busbar tie-in current coefficients of each busbar, small differential operating currents of each busbar are obtained, and the method further includes:

[0107] The second busbar small differential operating current is obtained through The second busbar small differential operating current is obtained through

[0108] ​​​​​a differential current of the second bus; a bus tie current coefficient of the second bus; 、 a current of other branches on the second bus; 、 a current coefficient of other branches on the second bus, which is a fixed constant.

[0109] Optionally, the respective bus is controlled and protected according to the differential current of the respective bus and a preset setting value, comprising:

[0110] when the differential current of the first bus is greater than the preset setting value, the first bus is disconnected;

[0111] when the differential current of the second bus is greater than the preset setting value, the second bus is disconnected.

[0112] It should be noted that the device corresponds to the above method, and all implementation manners in the above method embodiments are applicable to the device embodiments and can achieve the same technical effects.

[0113] In the embodiments of the present application, a computing device is further provided, comprising a processor and a memory storing a computer program, when the computer program is run by the processor, the method described in the above embodiments is executed. All implementation manners in the above method embodiments are applicable to this embodiment and can achieve the same technical effects.

[0114] In the embodiments of the present application, a computer readable storage medium is further provided, storing instructions, when the instructions are run on a computer, the computer executes the method described in the above embodiments. All implementation manners in the above method embodiments are applicable to this embodiment and can achieve the same technical effects.

[0115] Those skilled in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. The skilled person can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0116] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiments, which will not be described here.

[0117] In the embodiments of the present application, it should be understood that the disclosed apparatus and method can be implemented in other manners. For example, the embodiments of the apparatus described above are merely schematic, and the division of the units is merely logical function division, and there can be another division manner in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, devices or units, and can be in electrical, mechanical or other forms.

[0118] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purposes of the embodiments.

[0119] In addition, each functional unit in the various embodiments of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit.

[0120] If the functions are implemented in the form of software function units and sold or used as independent products, they 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 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 includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The foregoing storage medium includes: U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk, and various other media that can store program codes.

[0121] Moreover, it is pointed out that in the device and method of the present application, obviously, the components or steps can be decomposed and / or recombined. These decompositions and / or recombinations should be considered as equivalent solutions of the present application. Also, the steps of performing the above series of processes can naturally be executed in time sequence according to the order of description, but do not necessarily have to be executed in time sequence. Some steps can be executed in parallel or independently of each other. It can be understood by those skilled in the art that all or any steps or components of the method and device of the present application can be implemented in hardware, firmware, software, or a combination thereof, in any computing device (including a processor, a storage medium, etc.) or a network of computing devices, using the basic programming skills of those skilled in the art upon reading the description of the present application.

[0122] Therefore, the object of the present application can also be achieved by running a program or a set of programs on any computing device. The computing device can be a commonly known general-purpose device. Therefore, the object of the present application can also be achieved only by providing a program product containing program code for implementing the method or device. That is, such a program product also constitutes the present application, and a storage medium storing such a program product also constitutes the present application. Obviously, the storage medium can be any commonly known storage medium or any storage medium developed in the future. It is also pointed out that in the device and method of the present application, obviously, the components or steps can be decomposed and / or recombined. These decompositions and / or recombinations should be considered as equivalent solutions of the present application. Also, the steps of performing the above series of processes can naturally be executed in time sequence according to the order of description, but do not necessarily have to be executed in time sequence. Some steps can be executed in parallel or independently of each other.

[0123] The above is the preferred embodiment of the present application. It should be pointed out that for those skilled in the art, several improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A method of bus differential protection processing for a double-bus, the method comprising: The method comprises the following steps: obtaining state information of a bus tie switch and polarity requirement information of a bus tie current transformer; obtaining input information in a function soft panel of a protection device according to the polarity requirement information; obtaining bus tie current coefficients of each bus according to the state information and the input information; obtaining small differential operating currents of each bus according to the bus tie current coefficients of each bus; controlling and protecting each bus according to the small differential operating currents of each bus and preset setting values; wherein, the small differential operating currents of each bus are obtained according to the bus tie current coefficients of each bus, comprising: By , a small differential current of the first bus is obtained; wherein, is the differential current of the first busbar; is the bus tie current coefficient of the first busbar; , is the current of the other branch on the first busbar; , is the current coefficient of the other branch on the first busbar, which is a fixed constant; By , obtaining the small differential current of the second busbar; wherein, is the differential current of the second bus; is the bus tie current coefficient of the second bus; , is the current of the other branch on the second bus; , is the current coefficient of the other branch on the second bus, which is a fixed constant; wherein, the controlling and protecting of each bus according to the small differential operating currents of each bus and preset setting values, comprising: when the small differential operating current of the first bus is greater than the preset setting value, disconnecting the first bus; when the small differential operating current of the second bus is greater than the preset setting value, disconnecting the second bus.

2. The double-bus bus differential protection processing method of claim 1, wherein, The method comprises the following steps: obtaining state information of a bus tie switch and polarity requirement information of a bus tie current transformer, comprising: obtaining state information of a bus tie switch according to the opening and closing state of the bus tie switch; wherein, the state information comprises split position state information and closed position state information; 3. The double-bus bus differential protection processing method of claim 2, wherein, obtaining polarity requirement information of a bus tie current transformer according to the initial setting of the bus tie current transformer; wherein, the polarity requirement information comprises consistent with the polarity of the first bus and consistent with the polarity of the second bus. obtaining input information in a function soft panel of a protection device according to the polarity requirement information, comprising: when the polarity requirement information is consistent with the polarity of the first bus, setting the polarity principle item in the function soft panel of the protection device as the first bus input and the second bus output as the first input information; 4. The double-bus bus differential protection processing method of claim 3, wherein, when the polarity requirement information is consistent with the polarity of the second bus, setting the polarity principle item in the function soft panel of the protection device as the first bus output and the second bus input as the second input information. obtaining bus tie current coefficients of each bus according to the state information and the input information, comprising: when the state information is the split position state information, the bus tie current coefficient of the first bus is a first value and the bus tie current coefficient of the second bus is the first value; when the state information is the closed position state information and the input information is the first input information, the bus tie current coefficient of the first bus is a second value and the bus tie current coefficient of the second bus is a third value; 5. A double-bus bus differential protection processing device, characterized by, when the state information is the closed position state information and the input information is the second input information, the bus tie current coefficient of the first bus is the third value and the bus tie current coefficient of the second bus is the second value; the second value is opposite to the third value. The method comprises the following steps: a obtaining module, configured to obtain state information of a bus tie switch and polarity requirement information of a bus tie current transformer; a processing module, configured to obtain input information in a function soft panel of a protection device according to the polarity requirement information; obtain bus tie current coefficients of each bus according to the state information and the input information; obtain small differential operating currents of each bus according to the bus tie current coefficients of each bus; and control and protect each bus according to the small differential operating currents of each bus and preset setting values. The small differential operating current of each bus is obtained according to the bus tie current coefficient of each bus, and includes: By , a small differential current of the first bus is obtained; wherein, is the differential current of the first busbar; is the bus tie current coefficient of the first busbar; , is the current of the other branch on the first busbar; , is the current coefficient of the other branch on the first busbar, which is a fixed constant; By , obtaining the small differential current of the second busbar; wherein, is the differential current of the second bus; is the bus tie current coefficient of the second bus; , is the current of the other branch on the second bus; , is the current coefficient of the other branch on the second bus, which is a fixed constant; The control protection of each bus is performed according to the small differential operating current of each bus and a preset setting value, and includes: When the small differential operating current of the first bus is greater than the preset setting value, the first bus is disconnected; When the small differential operating current of the second bus is greater than the preset setting value, the second bus is disconnected.

6. A computing device, comprising: The method comprises the following steps: A processor and a memory storing a computer program, wherein the computer program is run by the processor to execute the method according to any one of claims 1 to 4.

7. A computer readable storage medium, characterized in that, An instruction is stored, and when the instruction is run on a computer, the computer executes the method according to any one of claims 1 to 4.

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