Intelligent bus coupler device

Abstract

The invention relates to the technical field of power systems, and discloses an intelligent bus coupler device, which comprises a power supply module, a bus coupler module and a bus coupler module, a cabinet which is provided with a bus wiring terminal; the electric control switch is used for being connected with the I-section bus and the II-section bus through bus wiring terminals; the touch screen is used for receiving an electric control switch control mode setting instruction input by a user; the data acquisition and processing module comprises a parameter setting module which is used for setting an electric control switch control mode according to an electric control switch control mode setting instruction; the processing module is used for generating a closing control signal or an opening control signal according to the control data corresponding to the control mode of the electric control switch; and the electric control switch is switched on or switched off according to the switching-on control signal or the switching-off control signal, so that switching-on and switching-off between the two sections of buses are realized. The electric control switch can be driven to be switched on and switched off through the control signal, on-off control of the I-section bus and the II-section bus is achieved, and the reliability of bus power supply of a power system is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power system, in particular to an intelligent bus tie device. BACKGROUND

[0002] In the field of power system, the direct current system refers to a special power supply system for providing stable direct current power supply for key loads such as relay protection, automatic device and communication equipment in a substation. In order to meet the increasing requirements of the operation regulation of the direct current system on power supply reliability, a multi-loop power supply line (i.e. the direct current bus double charging double power mode) with two loops and more is currently used so as to realize the non-delay bus switching when one power supply fails.

[0003] However, most of the substation and distribution stations have realized unattended operation. When one alternating current power supply fails, the charging module for the power supply will stop outputting, and at this time, the load of the bus section is borne by the corresponding battery pack. If the staff cannot complete the repair work before the battery pack is depleted, i.e. by manually operating the bus tie switch to connect the I section bus and the II section bus which are in the open state during normal operation, the relay protection device will lose power supply, and thus a major accident will be caused. Therefore, a standby direct current bus automatic switching device is urgently needed to improve the reliability of the direct current system, reduce the risk and workload of manual operation, and ensure the normal operation of the power station backup power supply system. SUMMARY

[0004] In view of the above problems, the embodiments of the present application provide an intelligent bus tie device, which aims to solve the above problems or at least partially solve the above problems.

[0005] In a first aspect, the embodiments of the present application provide an intelligent bus tie device, which comprises: a power supply module, configured to supply power to the intelligent bus tie device; a cabinet, wherein a bus terminal is arranged on the cabinet; an electric control switch, configured to be connected with an I section bus and an II section bus through the bus terminal; a touch screen, configured to receive a control mode setting instruction of the electric control switch input by a user; a data acquisition and processing module, comprising a parameter setting module and a processing module; wherein the parameter setting module is configured to set an electric control switch control mode according to the control mode setting instruction of the electric control switch; wherein the electric control switch control mode comprises an automatic control mode and a manual control mode; and the processing module is configured to generate a closing control signal or an opening control signal according to control data corresponding to the electric control switch control mode, and send the closing control signal or the opening control signal to the electric control switch; The electrically-controlled switch is used for electrically-controlled switch closing or opening according to the closing control signal or the opening control signal, so as to realize the on-off between the I-section bus and the II-section bus.

[0006] In some embodiments, the power supply module comprises a main power supply and a super capacitor; wherein the main power supply is powered by the I-section bus, the main power supply and the super capacitor are connected in parallel, and are electrically isolated by a diode.

[0007] In some embodiments, if the electrically-controlled switch control mode is a manual control mode, the control data is a closing instruction or an opening instruction input by a user through the touch screen.

[0008] In some embodiments, the device further comprises: a first voltage acquisition unit, used for acquiring the I-section bus voltage; a second voltage acquisition unit, used for acquiring the II-section bus voltage; wherein the first voltage acquisition unit and the second voltage acquisition unit are electrically connected with the data acquisition and processing module respectively; The parameter setting module is further used for setting the I-section bus voltage loss switching value, the II-section bus voltage loss switching value, the I-section bus normal voltage value, and the II-section bus normal voltage value. If the electrically-controlled switch control mode is an automatic control mode, the control data comprises the I-section bus voltage and the II-section bus voltage; when generating the closing control signal according to the control data corresponding to the electrically-controlled switch control mode, the processing module is specifically used for: generating the closing control signal if the I-section bus voltage is less than or equal to the I-section bus voltage loss switching value and the II-section bus voltage is greater than or equal to the II-section bus normal voltage value; or generating the closing control signal if the II-section bus voltage is less than or equal to the II-section bus voltage loss switching value and the I-section bus voltage is greater than or equal to the I-section bus normal voltage value.

[0009] In some embodiments, the device further comprises a voltage comparator, which is electrically connected with the first voltage acquisition unit, the second voltage acquisition unit, and the processing module respectively. The voltage comparator is used for receiving the I-section bus voltage and the II-section bus voltage; generating a bus voltage loss judgment signal if the I-section bus voltage is less than or equal to the I-section bus voltage loss switching value and the II-section bus voltage is greater than or equal to the II-section bus normal voltage value; or generating a bus voltage loss judgment signal if the II-section bus voltage is less than or equal to the II-section bus voltage loss switching value and the I-section bus voltage is greater than or equal to the I-section bus normal voltage value. The processing module is further configured to generate a closing control signal in response to receiving the bus voltage loss determination signal.

[0010] In some embodiments, the device further comprises a current acquisition unit configured to acquire the bus tie current. The parameter setting module is further configured to set a bus tie current threshold. The processing module is further configured to: If the bus tie current is greater than or equal to the bus tie current threshold, a tripping control signal is generated and sent to the electrically controlled switch.

[0011] In some embodiments, the data acquisition and processing module further comprises a user management module configured to: receive a user name and a password input by a user through the touch screen, and realize user login. The processing module is configured to generate a closing control signal or a tripping control signal according to control data corresponding to the control mode of the electrically controlled switch under the condition that the user is logged in.

[0012] In some embodiments, the device further comprises an export port, and the data acquisition and processing module further comprises a first recording module configured to: generate at least one operation behavior record; the type of the operation behavior record comprises: a data operation class, a device control class, and a user login class; wherein, the data operation class operation behavior record is generated according to the following steps: generating the data operation class operation behavior record according to a user name, an operation time, an operation type, and a data range; the device control class operation behavior record is generated according to the following steps: generating the device control class operation behavior record according to a control type and an operation time; the user login class operation behavior record is generated according to the following steps: generating the user login class operation behavior record according to a user name, a login operation or a logout operation, and an operation time; at least one of the following is performed: the at least one operation behavior record is displayed on the touch screen; the at least one operation behavior record is exported from the export port in response to a user inputted export instruction.

[0013] In some embodiments, the parameter setting module is further configured to set a recording interval time, and the data acquisition and processing module further comprises a second recording module configured to: acquire the I-section bus voltage, the II-section bus voltage, and the bus tie current according to the recording interval time, and generate at least one bus electrical parameter record; at least one of the following is performed: displaying the at least one busbar electrical parameter record on the touch screen; exporting the at least one busbar electrical parameter record from the export port in response to a user inputted export instruction.

[0014] In some embodiments, the data acquisition and processing module further comprises a data correction module for: setting at least one of the following according to a correction coefficient inputted by the user through the touch screen: the busbar voltage correction coefficient of the first section, the busbar voltage correction coefficient of the second section, and the busbar current correction coefficient.

[0015] By means of the above technical solution, the intelligent bus coupler device provided by the embodiments of the present application has the advantages of convenient operation, simple wiring, power supply guaranteed by the power supply module, connection with the first busbar and the second busbar realized by the busbar connection terminals of the case and the electric control switch, and the automatic or manual electric control switch control mode set by the parameter setting module of the data acquisition and processing module according to the touch screen received user's electric control switch control mode setting instruction. The processing module generates a closing or opening control signal according to the corresponding control data and sends it to the electric control switch, so as to make the electric control switch execute the closing or opening action to control the on-off of the two busbars. Finally, flexible control of the on-off between the first busbar and the second busbar can be realized in the unattended scenario of the transformer substation, the risk and workload of manual operation can be reduced, the reliability of the direct current system can be effectively improved, and the normal work of the power station backup power supply system can be guaranteed.

[0016] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the embodiments of the present application can be implemented in accordance with the content of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings: Figure 1 A structural schematic diagram of an intelligent bus coupler device provided by the embodiments of the present application is shown; Figure 2 A front panel design diagram of a case provided by the embodiments of the present application is shown; Figure 3 A rear panel design diagram of a case provided by the embodiments of the present application is shown; Figure 4 A schematic diagram of the interconnection principle of the direct current system two busbars and the electric control switch provided by the embodiments of the present application is shown; Figure 5A circuit schematic diagram of the intelligent bus tie device is shown; Figure 6 A circuit schematic diagram of the power supply module is shown; Figure 7 A parameter setting interface one of the intelligent bus tie device is shown; Figure 8 A monitoring page one of the intelligent bus tie device is shown; Figure 9 A monitoring page two of the intelligent bus tie device is shown; Figure 10 A structural schematic diagram of another intelligent bus tie device is shown; Figure 11 A monitoring page three of the intelligent bus tie device is shown; Figure 12 A parameter setting interface two is shown; Figure 13 A user login page is shown Figure 1 ; Figure 14 A login prompt information is shown; Figure 15 A user login page is shown Figure 2 ; Figure 16 A user information page is shown; Figure 17 A password change page is shown; Figure 18 A user account management page is shown; Figure 19 An operation behavior record interface of the intelligent bus tie device is shown; Figure 20 Operation behavior record export data is shown; Figure 21 A bus electrical parameter record interface of the intelligent bus tie device is shown; Figure 22 Bus electrical parameter record export data is shown; Figure 23 A data correction interface is shown. DETAILED DESCRIPTION

[0018] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the technical solutions provided by the present application. It will be apparent, however, to one skilled in the art that the technical solutions provided by the present application can be practiced without one or more of these specific details.

[0019] It should be noted that the terms used herein are only used to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in the specification, it indicates the presence of the described features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or combinations thereof.

[0020] Now, the exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in various different forms, and should not be interpreted as being limited to the embodiments set forth herein. It should be understood that the embodiments are provided so that the disclosure of the present application is thorough and complete, and the concepts of the exemplary embodiments are sufficiently conveyed to those of ordinary skill in the art.

[0021] Before introducing specific embodiments, the professional terms related to the embodiments of the present application are explained: 1) Bus tie: full name bus tie switch, is a key electrical equipment in the power system for connecting two busbars, mainly composed of circuit breakers and disconnectors; its core function is to maintain the breaking state during normal power supply, to realize double bus sectional operation or mutual standby, when a certain power supply or busbar fails, by closing the bus tie switch, the load can be quickly switched to the normal busbar or power supply circuit, thereby reducing the power outage range and significantly improving the reliability and flexibility of the power supply system.

[0022] 2) Loss of voltage: refers to the bus voltage continuously below the preset normal operating range, and cannot provide stable and reliable power supply for the load (such as relay protection equipment, circuit breaker).

[0023] As introduced before, most of the variable power stations have realized unattended operation, when one AC power supply is lost, the charging module for the power supply will stop output, at this time, the load of the bus section is borne by the corresponding battery pack; if the staff cannot complete the repair work before the battery pack is depleted, that is, by manually operating the bus tie switch, the I section bus and the II section bus in the open state during normal operation are connected, then the relay protection device will lose power supply, and further cause a major accident. Therefore, a backup DC bus automatic investment device is urgently needed to improve the reliability of the DC system, reduce the risk and workload of manual operation, and ensure the normal operation of the power station backup power supply system. Based on this, the application provides an intelligent bus coupler, which is described in detail below through specific examples.

[0024] Figure 1 The structure diagram of the intelligent bus coupler 100 provided by the embodiment of the application is shown. Figure 1 It can be seen that the intelligent bus coupler 100 provided by the embodiment of the application comprises: A power supply module 101 for supplying power to the intelligent bus coupler 100; A cabinet, wherein a bus terminal 102 is arranged on the cabinet; An electric control switch 103 for connecting with the I section bus and the II section bus through the bus terminal 102; A touch screen 104 for receiving a user input electric control switch control mode setting instruction; A data acquisition and processing module 105, wherein the data acquisition and processing module 105 comprises a parameter setting module 1051 and a processing module 1052; wherein the parameter setting module 1051 is used for setting an electric control switch control mode according to the electric control switch control mode setting instruction; wherein the electric control switch control mode comprises an automatic control mode and a manual control mode; the processing module 1052 is used for generating a closing control signal or an opening control signal according to control data corresponding to the electric control switch control mode, and sending the closing control signal or the opening control signal to the electric control switch 103; The electric control switch 103 is used for electric control switch closing or opening according to the closing control signal or the opening control signal, so as to realize the on-off between the I section bus and the II section bus.

[0025] Figure 2 The front panel design of the cabinet provided by the embodiment of the application is shown. Figure 3 The rear panel design of the cabinet provided by the embodiment of the application is shown. Figure 4 The interconnection principle diagram of the DC system two-section bus and the electric control switch provided by the embodiment of the application is shown.

[0026] Figure 3In the middle, I section bus (+): I section bus positive terminal; I section bus (-): I section bus negative terminal; II section bus (+): II section bus positive terminal; II section bus (-): II section bus negative terminal.

[0027] As Figure 3 , Figure 4 As shown, it can be understood that the bus terminal on the device cabinet includes: I section bus positive terminal (for connecting with I section bus positive), I section bus negative terminal (for connecting with I section bus negative), II section bus positive terminal (for connecting with II section bus positive), and II section bus negative terminal (for connecting with II section bus negative).

[0028] Here, the power supply voltage of the electric control switch can be DC 24V, and the terminal connection is technically improved to have the function of transmitting on-off signal. The electric control switch is connected with the I section bus positive terminal and the I section bus negative terminal through the input end, and is connected with the II section bus positive terminal and the II section bus negative terminal through the output end, so as to control the on-off of the two section buses. Under normal circumstances, the two section buses are independently powered, and when a section bus fails to supply power, the electric control switch is closed to interconnect the two section buses, so that the faulty bus is powered by the normal bus, ensuring the stability of the DC system and continuously providing DC power supply for the key equipment of the substation.

[0029] Figure 4 It is only a schematic diagram. In implementation, in the DC screen cabinet (DC system), the I section bus is output by N+1 charging modules and #1 battery pack in parallel, and bears one section load; the II section bus is output by N+1 charging modules and #2 battery pack in parallel, and bears two section load.

[0030] Before the intelligent bus coupler device is put into operation, it is necessary to check and ensure that the output current uniformity of all parallel running charging modules (including N+1 of the I section bus and N+1 of the II section bus) meets the standard (i.e. "current balancing", the difference of the output current of each module is within a reasonable range). If the output current uniformity of the parallel running charging modules is seriously unbalanced, it will often lead to the vicious consequence of all being burned out, especially when the I and II section bus coupler is connected and operated.

[0031] The data acquisition and processing module can adopt a high-speed and high-stability industrial-grade microprocessor. The microprocessor has the functions of analog signal input, digital signal input, and switch quantity control, and can meet the needs of multi-channel voltage and current signal sampling and processing, digital signal processing, and switch quantity control.

[0032] In implementation, a 7.0-inch touch screen can be used as a man-machine exchange interface to realize intelligent operation.

[0033] In implementation, before the smart bus coupler device is put into operation: 1. Repeatedly check each wiring, and the pressure and plug-in line of each wiring port should be correct and reliable to avoid poor contact affecting the operation of the device; 2. Confirm that the initial state of the electric control switch is in the open position (a multimeter can be used to measure the resistance of the I / II section wiring terminal on the back panel of the device, which should be infinite); 3. Press the "work switch" button to start the device; reset the power supply to be disconnected. Note that the electric control switch is in a self-locking state after being opened / closed until the control signal changes. Figure 2

[0034] The device can be applied to a 220V, 110V direct current system.

[0035] In some embodiments, the device further comprises an insulated gate bipolar transistor isolation driving circuit electrically connected to the electric control switch and the processing module, respectively.

[0036] Here, the insulated gate bipolar transistor isolation driving circuit, namely the IGBT isolation driving circuit, can receive the weak electric control signal output by the processing module, convert it into a strong electric power signal capable of driving the electric control switch to reliably open or close, solve the problem that the weak electric instruction cannot drive the high-power electric control switch to act, and achieve electrical isolation of the weak electric control loop and the strong electric switch loop by means of optical coupling and magnetic isolation, block the high-voltage surge and electromagnetic interference generated when the electric control switch acts, avoid interference from entering the processing module to cause misjudgment, and prevent strong electric reverse breakdown from damaging the core and precise components of the processing module. In addition, the circuit usually integrates protection functions such as overcurrent, overtemperature, and overvoltage, and can immediately cut off the driving signal if abnormal driving is detected (such as overloading caused by switch sticking), avoid device burning and fault expansion, and adapt to the signal type and level requirements of the processing module and the electric control switch, ensure accurate transmission and execution of the control instruction, and ultimately ensure the action reliability and safety of the smart bus coupler device under complex working conditions of the power system, and adapt to the demand for stable operation of equipment in the unattended scene.

[0037] As can be seen, the smart bus coupler device of the embodiment of the present application has the advantages of convenient operation and simple wiring. The device is powered by the power supply module, connected to the I section bus and the II section bus through the bus wiring terminal and the electric control switch of the case, and receives the electric control switch control mode setting instruction of the user through the touch screen. The parameter setting module of the data acquisition and processing module sets the automatic or manual electric control switch control mode accordingly, the processing module generates the closing or opening control signal according to the corresponding control data and sends it to the electric control switch, and the electric control switch executes the closing or opening action to control the on-off of the two section buses. Finally, flexible control of the on-off between the I section bus and the II section bus can be realized in the unattended scene of the transformer distribution station, the risk and workload of manual operation are reduced, the reliability of the direct current system is effectively improved, and the normal work of the power station backup power supply system is ensured. ​

[0038] The intelligent bus tie device is described in detail below.

[0039] In some extreme cases in actual application scenarios, the original power supply capacity of the faulty bus (such as when the main power supply is powered off and only the battery is used for backup) cannot stably provide sufficient power to reliably drive the electric control switch to operate, because the battery pack needs to prioritize normal load or has insufficient capacity. Once the electric control switch cannot operate normally, the switching of the backup bus will be affected, and the risk of power loss of the relay protection device will also increase. Based on this, in some embodiments of the present application, the power supply module includes a main power supply and a super capacitor; wherein the main power supply is powered by the I-section bus, the main power supply and the super capacitor are connected in parallel, and are electrically isolated by a diode.

[0040] Figure 5 A circuit schematic diagram of the intelligent bus tie device provided by the embodiments of the present application is shown. Figure 6 A circuit schematic diagram of the power supply module provided by the embodiments of the present application is shown. The embodiments will be described below with reference to the circuit schematic diagram. Figure 5 、 6 The embodiments will be described below with reference to the circuit schematic diagram.

[0041] In the present embodiment, the super capacitor is a new type of energy storage device between the traditional capacitor and the rechargeable battery. It has the characteristics of fast charging and discharging of the capacitor, and the energy storage characteristics of the battery, with advantages such as high energy, large discharge rate, ultra-thin, and high safety. Referring to Figure 5 、 6 The connection mode of the main power supply (two switching power supplies U1, U2) and the super capacitor is common bus parallel connection, and is electrically isolated by a diode.

[0042] Specifically, the switching power supplies U1 and U2 are backups for each other, and their output ends are connected to the 24V power supply bus through diodes (D2, D1) to form a main power supply circuit; the super capacitor C1 is connected to the 24V power supply bus through diode D3 and double switch SB-2, forming a "main-backup complementary" power supply architecture with the main power supply circuit. The presence of the diode prevents reverse current flow and ensures the independence and safety of each power supply unit.

[0043] When operating normally, the main power supply U1 or U2 provides stable 24V power supply for the system, and at this time the super capacitor C1 is in an automatic standby / charging state (because SB-2 and SB1 are double switches, they are closed simultaneously when working, so that the super capacitor is connected to the circuit but does not actively discharge); when the main power supply is powered off (such as when U1 and U2 are both faulty or the corresponding bus is powered off), the super capacitor immediately discharges at a large rate, taking advantage of its high energy density characteristics to provide emergency driving power for key components such as the electric control switch, ensuring that the backup bus switching operation is reliably executed and avoiding power loss of the relay protection device.

[0044] Figure 2 The "energy storage indication" in the "energy storage indication" can display the real-time voltage value of the energy storage supercapacitor. After the initial power-on use, the I-section bus is connected normally, and the exemplary "split / combined" gate operation should be performed after the supercapacitor charging (energy storage indication) ≥12V (when the supercapacitor is used independently, the voltage should be ≥15V), otherwise the operation will fail due to insufficient power supply.

[0045] The embodiment connects the main power supply powered by the I-section bus and the supercapacitor in parallel, and realizes electrical isolation with the help of a diode. First, it can rely on the main power supply to provide stable working power for the intelligent bus coupler under normal working conditions, ensuring the normal operation of the data acquisition and processing module to accurately generate the split and close gate control signals of the electric control switch, and then ensuring that the electric control switch can reliably act according to the control signal. In extreme cases (such as the main power supply of the fault bus losing power, the storage battery cannot provide enough power to drive the electric control switch due to the need to prioritize normal load or insufficient capacity), the supercapacitor can play an emergency power supply role in time, and through the parallel circuit, it can supplement the electric control switch and the core components of the device with power, avoiding the problem that the electric control switch cannot work and the standby bus switching is affected due to insufficient power supply. At the same time, the electrical isolation design of the diode can prevent the reverse flow of current between the main power supply and the supercapacitor, ensuring that they work independently and do not interfere with each other, further improving the stability of the power supply module, and ultimately effectively reducing the risk of loss of power supply of relay protection equipment due to power supply problems, and meeting the needs of unattended substation for device automation and high reliability, reducing the dependence on manual operation and the risks that may be caused by manual operation.

[0046] In other embodiments, the power supply module includes a main power supply, a supercapacitor, and a lithium polymer battery pack. The main power supply is powered by the I-section bus, the main power supply and the supercapacitor are connected in parallel, and the electrical isolation is realized through a diode. The lithium polymer battery pack is also connected in parallel to the I-section bus through its own voltage booster module and diode, and the electrical isolation is realized through a diode.

[0047] In this embodiment, the power supply module uses the main power supply from the I-section busbar to ensure stable power supply under normal operating conditions. The supercapacitor can quickly provide emergency power when the main power supply fails. The lithium polymer battery pack is connected in parallel to the I-section busbar via its own boost module and diodes, achieving electrical isolation. In extreme scenarios where neither the main power supply nor the supercapacitor can meet the power supply requirements (such as insufficient busbar voltage or depletion of supercapacitor energy storage), the boost module can output stable power to supplement the power supply. At the same time, the diode isolation design between the three can avoid reverse current flow or mutual interference between the power supply units, ultimately forming a three-level power supply guarantee. This significantly improves the reliability and adaptability of the power supply module, ensuring that key components of the intelligent busbar interconnection device can obtain continuous power under various fault conditions, and ensuring the reliable execution of the on / off control between the I-section busbar and the II-section busbar, meeting the power supply stability requirements of unattended substation scenarios.

[0048] In some embodiments, if the control mode of the electronic switch is manual control, then the control data is: the closing command or opening command input by the user through the touch screen.

[0049] Figure 7 The parameter setting interface of the intelligent bus connection device provided in the embodiment of this application is shown. Figure 8 This shows a monitoring page of the intelligent bus connection device provided in an embodiment of this application. Figure 9 This shows the monitoring page 2 of the intelligent bus linkage device provided in the embodiment of this application. The following is in conjunction with... Figure 7 , 8 Sections 9 and 10 provide an exemplary description of this embodiment.

[0050] In this embodiment, see Figure 7 As shown, in the parameter setting interface one, users can set the control mode of the electric operating mechanism, that is, the electric control switch control mode. Specifically, users can check "Set as manual control mode" to set the electric control switch control mode to manual control mode.

[0051] See Figure 8 , 9 As shown, during implementation, the user can click the "Manual Closing" button (red part) on the monitoring page via the touch screen. The processing module receives the closing command, outputs a closing control signal, and sends it to the electrical control switch to drive the electrical control switch to close. The processing module of this device supports the following... Figure 8The software shown can also record and store relevant information (bus voltage values of I and II sections, closing time), accompanied by closing alarm text prompts and buzzer alarm prompts (click the sound icon to switch to "speaker / mute"). Users can also touch the "manual opening" button (green part) on the monitoring page through the touch screen. The processing module receives the opening instruction, outputs the opening control signal, and sends it to the electric control switch to drive the electric control switch to open. The software supported by the processing module of the device can also record and store relevant information (bus voltage values of I and II sections, opening time), and the relevant alarm prompts are turned off.

[0052] As can be seen, when the switch is actually closed, the monitoring page can simulate the switch icon (such as DK1 in Figure 8 ) to display "closed"; when it is actually opened, the simulation icon displays "open", ensuring that the screen display is completely synchronized with the hardware state. When implementing, if the "control output line" of the device and the electric control switch is loose or broken, the device cannot receive the real feedback signal (the switch state cannot be determined). At this time, the monitoring page starts the fault tolerance logic, and defaults to simulate the "closed" state until the wiring is repaired and the feedback signal can be received, and then automatically switches to the actual state of the switch (open / closed), avoiding misjudgment caused by chaotic state display.

[0053] Figure 10 A structure schematic diagram of another intelligent bus coupler device provided by an embodiment of the present application is shown. Referring to Figure 10 , in some embodiments of the present application, the device further comprises: a first voltage acquisition unit 106, configured to acquire the bus voltage of I section; a second voltage acquisition unit 107, configured to acquire the bus voltage of II section; wherein the first voltage acquisition unit 106 and the second voltage acquisition unit 107 are electrically connected with the data acquisition and processing module respectively; The parameter setting module is further configured to set the bus voltage loss switching value of I section, the bus voltage loss switching value of II section, the normal bus voltage value of I section, and the normal bus voltage value of II section; If the control mode of the electric control switch is an automatic control mode, the control data comprises the bus voltage of I section and the bus voltage of II section; when generating the closing control signal according to the control data corresponding to the control mode of the electric control switch, the processing module is specifically configured to: if the bus voltage of I section is less than or equal to the bus voltage loss switching value of I section, and the bus voltage of II section is greater than or equal to the normal bus voltage value of II section, a closing control signal is generated; or if the bus voltage of II section is less than or equal to the bus voltage loss switching value of II section, and the bus voltage of I section is greater than or equal to the normal bus voltage value of I section, a closing control signal is generated.

[0054] Figure 11 The third monitoring page of the intelligent bus connection device provided in the embodiment of this application is shown.

[0055] In this embodiment, the voltage range of bus section I and bus section II can be 0 to 300V. If the voltage of bus section I (or II) is detected to be less than or equal to the undervoltage switching value, and the voltage of bus section II (or I) is greater than or equal to the normal voltage value, the automatic closing electrical control switch operation is executed.

[0056] See Figure 7 As shown, users can select "Set as automatic control mode" via the touchscreen. This sets the electrical control switch to automatic control mode. Then, the undervoltage switching values ​​for section I and section II busbars, the normal voltage values ​​for section I and section II busbars can be set.

[0057] Here, the undervoltage switching values ​​for bus section I and bus section II refer to the critical voltage thresholds at which a bus section (section I or section II) experiences undervoltage and triggers the bus tie switch. When the bus voltage falls below these values, the bus tie switch is automatically switched, interconnecting the two bus sections and supplying power to the undervoltage section using the normal section. In practice, these values ​​can be set to the voltage at 50% C10, such as 200V, based on the battery pack's discharge characteristics.

[0058] The normal voltage values ​​for bus section I and bus section II can be set according to actual needs; for example, they can be set slightly lower than the float charge voltage value. It is understood that if the normal voltage setting value is not met, both bus sections I and II will experience undervoltage faults, making closing the circuit breaker meaningless. If it is necessary to ignore the setting condition of "and meet the normal voltage value of bus section II (or I)," it can be set to "0".

[0059] During implementation, the automatic control mode does not have an automatic tripping function. Because the voltage of the two sections is equal after the bus coupler is in parallel operation, maintenance personnel can only confirm that the I and II bus sections have returned to normal before resetting to "manual control mode" to perform manual tripping operation in order to avoid DC system voltage loss.

[0060] In some embodiments, the device further includes a voltage comparator 110, which is electrically connected to the first voltage acquisition unit, the second voltage acquisition unit, and the processing module, respectively. The voltage comparator is configured to: receive the voltage of bus section I and the voltage of bus section II; generate a bus undervoltage determination signal if the voltage of bus section I is less than or equal to the undervoltage switching value of bus section I and the voltage of bus section II is greater than or equal to the normal voltage value of bus section II; or generate a bus undervoltage determination signal if the voltage of bus section II is less than or equal to the undervoltage switching value of bus section II and the voltage of bus section I is greater than or equal to the normal voltage value of bus section I. The processing module is further configured to generate a closing control signal in response to receiving the bus voltage loss determination signal.

[0061] In this embodiment, for the voltage comparator, for example, the ADCMP567 circuit can be used to realize voltage comparison, which is a super-fast voltage comparator manufactured by ADI's proprietary XFCB process. The propagation delay of the device is 250 ps, and the overdrive dissipation is less than 35 ps. Overdrive dissipation is a measure of the difference in propagation delay under different overdrive conditions, which is a particularly important characteristic of high-speed comparators. Fast, high-precision differential input stage makes the propagation delay of various signals consistent, with a common mode range of -2.0 V to +3.0 V. The output is a complementary digital signal, fully compatible with the PECL 10 K and 10 KH logic series. These outputs provide sufficient drive current to directly drive IGBT drive modules with 50Ω resistance terminated to VDD - 2 V. The device also provides a latched input and can operate in tracking, track-and-hold or sample-and-hold mode to ensure fault response time.

[0062] In implementation, a double integration circuit can also be used to solve the normal voltage fluctuation caused by the change of bus load.

[0063] In this embodiment, by adding a voltage comparator and directly connecting it with the voltage acquisition unit and the processing module, the hardware circuit can receive the voltages of the two bus sections in real time and quickly complete the threshold comparison, without going through the "data transmission-logic calculation-signal output" link of program operation, greatly shortening the response time of fault identification and closing instruction generation, and accurately capturing high-speed fault scenarios such as voltage transient drop caused by charging device failure; At the same time, direct comparison at the hardware level can effectively resist electromagnetic interference in the substation, reduce the delay or misjudgment that may occur in program operation, and ultimately significantly improve the timeliness, accuracy and reliability of the bus voltage loss fault response.

[0064] In some embodiments, the device further comprises a current acquisition unit 108 for acquiring the bus tie current; The parameter setting module is further configured to set a bus tie current threshold. The processing module is further configured to generate an opening control signal and send it to the electrically controlled switch if the bus tie current is greater than or equal to the bus tie current threshold.

[0065] In this embodiment, the bus tie current refers to the current flowing through the electrically controlled switch. In implementation, the bus tie current range can be 0-50A.

[0066] In implementation, the user can click "Next" in Figure 7 to get Figure 12The parameter setting interface shown in this embodiment is the second one provided by this application. On this interface, the user can check "Enable" to enable the automatic tripping control function for bus tie current exceeding the limit. The bus tie current threshold can be set, such as 50A as shown in the figure. When the detected bus tie current is ≥50A, the bus tie electrical control switch will automatically trip. This function will fail if disabled or if the set value is much higher than the upper limit detected by the current sensor.

[0067] In this embodiment, the device monitors the bus tie current in real time through the current acquisition unit. The parameter setting module can flexibly set the bus tie current threshold. When the bus tie current reaches or exceeds the threshold, the processing module automatically generates a tripping control signal and sends it to the electrical control switch. This effectively avoids overload operation caused by overcurrent after the bus tie is closed, preventing the fault from escalating. At the same time, the flexible threshold setting can adapt to different field conditions, and the automatic tripping does not require manual intervention, meeting the needs of unattended substations. This further ensures the stability of the DC system and the safety of relay protection equipment, meeting the design goal of improving the device's operational reliability and avoiding catastrophic accidents.

[0068] In some embodiments, the data acquisition and processing module further includes a user management module 1053, used for: The system receives the username and password entered by the user via the touchscreen to enable user login. The processing module is used to generate a closing control signal or a opening control signal based on the control data corresponding to the control mode of the electric switch, under the condition that the user is logged in.

[0069] Figure 13 This application provides a schematic diagram of a user login page according to an embodiment. Figure 1 . Figure 14 A schematic diagram of login prompt information provided in an embodiment of this application is shown. Figure 15 This application provides a schematic diagram of a user login page according to an embodiment. Figure 2 . Figure 16 A schematic diagram of a user information page provided in an embodiment of this application is shown. Figure 17 A schematic diagram of the password change page provided in an embodiment of this application is shown. Figure 18 A schematic diagram of a user account management page provided in an embodiment of this application is shown below. Figures 13-18 This embodiment is described by way of example.

[0070] In this embodiment, the user can click the "User Login" button on the touchscreen to enter the login page, such as... Figure 13 As shown, select "Username", enter "User Password", and click the "Login" button. The user management module receives the login instruction and returns to the monitoring main page based on the username and password entered by the user. If the password is correct, the user is logged in; if the password is incorrect, an error message will be displayed.

[0071] After the user logs in, the processing module generates the closing control signal or the opening control signal according to the control data corresponding to the electrically controlled switch control mode. The non-user operation monitoring page cannot be used when the "manual opening" and "manual closing" buttons are clicked, and a prompt is given, as shown in the figure, so as to prevent irrelevant personnel from misoperation. When the user does not log in (visitor), only the "information record" and "data record" operations can be viewed / exported; no other buttons or functions with the disabled mark can be operated. Figure 14

[0072] In implementation, the login page can be entered again, and a user "logout" button is provided at the upper right corner, as shown in the figure, which can be clicked to log out the current user. The maintenance personnel should log out the personal user before leaving to prevent irrelevant personnel from operating. Figure 15

[0073] As shown in the figure, the "user information" button is clicked at the upper left corner of the parameter setting page, and an information dialog box is popped up. The "change password" is clicked to obtain Figure 16 , and the user can enter a new password and click "confirm" to complete the password change. Figure 17

[0074] In implementation, the management personnel can log in to the user account management page as shown in the figure, wherein the serial number 1 is the management personnel, and the other accounts are ordinary users. Sixteen accounts and password management are provided in the software controlled by the processing module of the device, which are changed / entered by the management personnel, and the non-management personnel cannot log in to the page. Figure 18

[0075] The user login verification is realized by the user management module in the embodiment. Only after the authorized user logs in, the processing module generates the opening / closing control signal of the electrically controlled switch, which can effectively prevent the operation of non-authorized personnel, avoid the bus switching failure caused by misoperation or malicious operation, facilitate the tracing of operation responsibility, enhance the safety and management standardization of device operation, and ensure the reliability of the I and II section bus on-off control.

[0076] In some embodiments, the device further comprises an export port 109, and the data acquisition and processing module further comprises a first recording module 1054, configured to: generate at least one operation behavior record; the type of the operation behavior record includes: data operation class, device control class, and user login class; wherein, the data operation class operation behavior record is generated according to the following steps: generating the data operation class operation behavior record according to the user name, operation time, operation type, and data range; the device control class operation behavior record is generated according to the following steps: generating the device control class operation behavior record according to the control type and operation time; ​​​​The user login type operation behavior record is generated according to the following steps: generating the user login type operation behavior record according to a user name, a login operation or a logout operation, and an operation time; At least one of the following is performed: Displaying the at least one operation behavior record on the touch screen; Exporting the at least one operation behavior record from the export port in response to a user inputted export instruction.

[0077] Figure 19 An operation behavior record interface of the intelligent bus coupler device is shown. The embodiment is exemplarily described below. Figure 19 The embodiment is exemplarily described below. Figure 19 In the embodiment, the first record module records behaviors including a data operation type (emptying data), a device control type (manual closing, manual opening, automatic closing), and a user login type (logging out and logging in). As shown in

[0078] In the embodiment, the first record module records behaviors including a data operation type (emptying data), a device control type (manual closing, manual opening, automatic closing), and a user login type (logging out and logging in). As shown in Figure 19 The data operation type operation behavior record can be generated according to a user name, an operation time, and an operation type (for example, emptying data operation) and a data range (information record, that is, operation behavior record). The device control type operation behavior record can be generated according to a control type (manual closing, manual opening, and automatic closing) and an operation time. The user login type operation behavior record can be generated according to a user name, a login operation or a logout operation, and an operation time.

[0079] In implementation, data can also be exported through an export port. The export port is connected with a U disk. By clicking a "data export" button on the touch screen, all operation behavior record data in the storage can be exported to the U disk. The storage path can be set by the user. The maximum number of exported data can be set to 2000. Figure 20 Operation behavior record data exported by the embodiment is shown. Maintenance personnel can analyze and archive the exported operation behavior record data.

[0080] The first recording module in the embodiment can generate data operation, device control, user login and other types of operation behavior records, can comprehensively retain device key operation information, facilitate maintenance personnel to trace operation process and clear responsibility attribution, and is also beneficial to subsequent troubleshooting of fault sources. Meanwhile, the touch screen displays the records, which is intuitive and convenient for on-site viewing, and the export port supports response instruction export of the records, which is convenient for archiving storage or offline analysis, meets the management needs of power equipment operation logs, improves the transparency and maintainability of device operation, and further guarantees the reliability of the I and II section bus switching control.

[0081] In some embodiments, the parameter setting module is further configured to set a recording interval time; and the data acquisition and processing module further comprises a second recording module 1055 configured to: acquire the I section bus voltage, the II section bus voltage and the bus tie current according to the recording interval time, and generate at least one bus electrical parameter record; perform at least one of the following: display the at least one bus electrical parameter record on the touch screen; in response to a user inputted export instruction, export the at least one bus electrical parameter record from the export port.

[0082] In the embodiment, after the recording interval time is set by the parameter setting module, the I and II section bus voltage values and the bus tie current value after the bus tie are automatically stored once according to the set time interval. According to each storage time, the I section bus voltage, the II section bus voltage and the bus tie current at each storage time, the corresponding bus electrical parameter record can be generated. In implementation, the first group of data can be recorded after the software is powered on for 1 minute, and then the monitoring values are recorded according to the set time interval.

[0083] Figure 21 A bus electrical parameter record interface of the intelligent bus tie device provided by the embodiment of the application is shown. Figure 21 In the embodiment, the first page: return to the first page. The previous page: turn one page up. The next page: turn one page down. The last page: jump to the last page. Data clear: clear all record data and release the storage memory. It is suggested to clear once a year.

[0084] In implementation, the data can also be exported through the export port: correctly plug in the U disk, click the "data export" button, and the data is exported to the U disk. The save path can be set by the user, and the maximum export number can be set to 2000. Figure 22 The bus electrical parameter record export data provided by the embodiment of the application is shown. The maintenance personnel can analyze and archive the export data.

[0085] In this embodiment, the parameter setting module can flexibly set the recording interval time, and the second recording module continuously acquires and records the bus voltage of the first section, the bus voltage of the second section and the bus tie-in current according to the interval, so as to realize the normal monitoring and data storage of the bus electrical parameters, facilitate the tracing of the parameter change trend to troubleshoot potential faults in advance, directly display the records through the touch screen to enable the maintenance personnel to intuitively master the bus operation state without the need of additional equipment for inquiry, and simultaneously export the records in response to the export instruction to facilitate the offline analysis of the fault causes, the archiving and maintenance of the data, further improve the maintainability and data management capability of the device, and provide data support for the stable operation of the first section and the second section of the bus and the safety of the relay protection equipment.

[0086] In implementation, the parameter setting module can also be used to set the screen sleep time setting: click the screen sleep control "operation" button to "turn on / off" the function, and when the touch screen has no any action within the set time, the screen is automatically turned off and the current user is automatically logged out. Note: the sleep time can be set according to actual needs, and the minimum value can be set to 15 seconds, and it is recommended to set 10 minutes or more; during the sleep process, the touch screen can be clicked at any time to activate the display.

[0087] In some embodiments, the data acquisition and processing module further includes a data correction module 1056 for: According to the correction coefficient input by the user through the touch screen, at least one of the following is set: the first section bus voltage correction coefficient, the second section bus voltage correction coefficient, and the bus tie-in current correction coefficient.

[0088] Figure 23 A data correction interface schematic diagram provided by the embodiment of the application is shown. In combination with Figure 23 In this embodiment, the user can input the first section bus voltage correction coefficient, the second section bus voltage correction coefficient and the bus tie-in current correction coefficient through the touch screen, and the data correction module receives and sets these coefficients.

[0089] In implementation, as Figure 23 indicated, the system time can also be corrected.

[0090] In the device of this embodiment, the data correction module allows the user to input the correction coefficient to correct the key acquisition parameters such as the first section bus voltage, the second section bus voltage and the bus tie-in current, effectively eliminates the acquisition data deviation caused by equipment errors, environmental interference and the like, and improves the data accuracy; accurate voltage and current data provide reliable basis for the processing module to generate accurate control signals, ensure that the opening and closing actions of the electric control switch meet the actual working condition requirements, at the same time, enhance the adaptability of the device to different site environments, and improve the overall operation reliability.

[0091] In implementation, for example, the core technical parameters of the intelligent bus tie-in device are shown in Table 1.

[0092] Table 1 Core technical parameter table of intelligent bus coupler device

[0093] In the present application, the terms "first", "second", "third" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance; the term "multiple" refers to two or more, unless otherwise explicitly limited. The terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, "connecting" can be fixed connection, or detachable connection, or integrally connected; "connected" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0094] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application.

[0095] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "a specific embodiment" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0096] The above is only the preferred embodiment of the present application, and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An intelligent bus coupling device, characterized in that, The device includes: The power supply module is used to supply power to the intelligent bus connection device; The chassis is equipped with busbar terminals; An electrical control switch is used to connect to bus section I and bus section II via the bus terminal blocks; The touchscreen is used to receive user input commands for setting the control mode of the electronic switch. The data acquisition and processing module includes a parameter setting module and a processing module. The parameter setting module is used to set the control mode of the electric control switch according to the control mode setting instruction. The control mode of the electric control switch includes an automatic control mode and a manual control mode. The processing module is used to generate a closing control signal or a opening control signal based on the control data corresponding to the control mode of the electric control switch, and send it to the electric control switch. The electrical control switch is used to close or open the switch according to the closing control signal or the opening control signal, thereby realizing the connection and disconnection between the I section bus and the II section bus.

2. The apparatus according to claim 1, characterized in that, The power supply module includes a main power supply and a supercapacitor; wherein the main power supply is powered by the I-section bus, the main power supply and the supercapacitor are connected in parallel and electrically isolated by diodes.

3. The apparatus according to claim 1, characterized in that, If the control mode of the electrical switch is manual control, then the control data is: the closing command or opening command input by the user through the touch screen.

4. The apparatus according to claim 1, characterized in that, The device further includes: The first voltage acquisition unit is used to acquire the voltage of bus section I; The second voltage acquisition unit is used to acquire the voltage of the II section bus; wherein, the first voltage acquisition unit and the second voltage acquisition unit are electrically connected to the data acquisition and processing module respectively; The parameter setting module is also used to set the undervoltage switching value of section I bus, the undervoltage switching value of section II bus, the normal voltage value of section I bus, and the normal voltage value of section II bus; If the control mode of the electric switch is automatic control, then the control data includes the voltage of section I bus and the voltage of section II bus; when the processing module generates the closing control signal based on the control data corresponding to the control mode of the electric switch, it is specifically used for: If the voltage of bus section I is less than or equal to the undervoltage switching value of bus section I, and the voltage of bus section II is greater than or equal to the normal voltage value of bus section II, a closing control signal is generated; or If the voltage of the II section bus is less than or equal to the undervoltage switching value of the II section bus, and the voltage of the I section bus is greater than or equal to the normal voltage value of the I section bus, a closing control signal is generated.

5. The apparatus according to claim 1, characterized in that, The device further includes a voltage comparator, which is electrically connected to the first voltage acquisition unit, the second voltage acquisition unit, and the processing module, respectively. The voltage comparator is configured to: receive the voltage of bus section I and the voltage of bus section II; generate a bus undervoltage determination signal if the voltage of bus section I is less than or equal to the undervoltage switching value of bus section I and the voltage of bus section II is greater than or equal to the normal voltage value of bus section II; or generate a bus undervoltage determination signal if the voltage of bus section II is less than or equal to the undervoltage switching value of bus section II and the voltage of bus section I is greater than or equal to the normal voltage value of bus section I. The processing module is also used to: generate a closing control signal in response to receiving the bus undervoltage determination signal.

6. The apparatus according to claim 1, characterized in that, The device also includes a current acquisition unit for acquiring the bus tie current; The parameter setting module is also used to set the bus tie current threshold; The processing module is also used for: If the bus tie current is greater than or equal to the bus tie current threshold, a trip control signal is generated and sent to the electrical control switch.

7. The apparatus according to claim 1, characterized in that, The data acquisition and processing module also includes a user management module, used to: receive the username and password entered by the user through the touch screen to enable user login; The processing module is used to generate a closing control signal or a opening control signal based on the control data corresponding to the control mode of the electric switch, under the condition that the user is logged in.

8. The apparatus according to claim 1, characterized in that, The device further includes an export port, and the data acquisition and processing module further includes a first recording module, used for: At least one operation behavior record is generated; the types of the operation behavior record include: data operation type, device control type, and user login type; wherein... Data operation behavior records are generated according to the following steps: the data operation behavior records are generated based on the user name, operation time, operation type, and data range; The equipment control operation behavior record is generated according to the following steps: the equipment control operation behavior record is generated according to the control type and operation time; User login-related operation records are generated according to the following steps: the user login-related operation records are generated based on the user name, login or logout operation, and operation time; Perform at least one of the following: Display the at least one operation record on the touchscreen; In response to an export command input by the user, the at least one operation behavior record is exported from the export port.

9. The apparatus according to claim 4, characterized in that, The parameter setting module is also used to set the recording interval time; the data acquisition and processing module further includes a second recording module, used for: According to the recorded interval time, the voltage of the first section bus, the voltage of the second section bus, and the bus tie current are obtained, and at least one bus electrical parameter record is generated; Perform at least one of the following: The electrical parameter record of at least one busbar is displayed on the touch screen; In response to an export command input by the user, the at least one bus electrical parameter record is exported from the export port.

10. The apparatus according to any one of claims 1-9, characterized in that, The data acquisition and processing module also includes a data correction module, used for: Based on the correction coefficients input by the user via the touchscreen, at least one of the following is set: Section I bus voltage correction coefficient, Section II bus voltage correction coefficient, and bus tie current correction coefficient.

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