Substation integrated protection device

Abstract

The present invention discloses an integrated protection device for a substation, including an on-site device and an integrated microcomputer protection device; the on-site device is arranged in each compartment of the substation, used to collect AC measurement SV information and remote signal GOOSE information, and is responsible for controlling the switch opening and closing of the equipment in this compartment; the integrated microcomputer protection device is used to receive and process SV information and GOOSE information, and output control commands to the on-site device according to the preset protection logic to realize the protection action function. The present application makes the protection wiring of the substation more concise and clear by setting the on-site device and the integrated microcomputer device, the wiring definition of the device is applicable to all devices for easy understanding, the protection logic principle is more intuitive and easy to understand, and the maintenance is convenient and simple.

Description

Technical Field

[0001] The invention belongs to the technical field of transformer substation relay protection, and in particular relates to an integrated transformer substation protection device. Background Art

[0002] The protection function of the substation is realized by the protection and measurement and control devices configured by interval. The protection is divided into different types according to the lines, main transformers, busbars and other equipment. When a fault occurs, the protection device of the interval will be activated to remove the fault. When the cross-interval protection action occurs, it is realized by a separate management device (such as standby automatic switching) through complex wiring. At present, the intelligent substation has realized the measurement and signal data between intervals transmitted by optical signals, which greatly simplifies the protection wiring.

[0003] The existing substation protection functions are realized by the protection and measurement and control devices configured according to the intervals, and the protection type is determined by the protected equipment. There are many types and the protection functions are realized by the local protection devices, which makes the substation wiring complicated. The protection functions realized across intervals make the protection principle and connection complicated, which brings great trouble to the understanding of the protection principle and on-site maintenance. Summary of the invention

[0004] The purpose of the present invention is to solve the problems raised in the above background technology and provide an integrated substation protection device to make the protection wiring of the substation more concise and clear, the wiring definition of the device is applicable to all equipment for easy understanding, and the protection logic principle is more intuitive and easy to understand.

[0005] In order to achieve the purpose of the present invention, the present invention discloses an integrated protection device for a substation, including a local device and an integrated microcomputer protection device; the local device is arranged in each interval of the substation, and is used to collect AC measurement SV information and remote signal GOOSE information, and is responsible for controlling the opening and closing of switches of equipment in this interval; the integrated microcomputer protection device is used to receive and process SV information and GOOSE information, and output control commands to the local device according to a preset protection logic to realize the protection action function.

[0006] Furthermore, the local device includes an acquisition board, a control board, an operation circuit board, a CPU communication board and a telemetering board; the acquisition board is responsible for acquiring the AC measurement SV information of the equipment; the control board is responsible for receiving the control command from the integrated microcomputer protection device and outputting it to the corresponding operation circuit board; the operation circuit board is responsible for the control output of the switch, and receives the control command of the integrated microcomputer protection device to the switch of this interval; the CPU communication board is responsible for the calculation and communication of the device, as well as the information transmission of each board; the telemetering board is responsible for the access and collection of telemetering GOOSE information.

[0007] Furthermore, there are wiring information QR codes on the top of the acquisition board, control board, operation circuit board, and remote signal board. Scanning the wiring information QR code can obtain the terminal row definition specified for each board, thereby achieving standardized and unified wiring forms.

[0008] Furthermore, SV information can also be collected through the existing merging unit at the substation site; SV information collected by local devices or merging units is input into the SV switch and then transmitted to the integrated microcomputer protection device.

[0009] Furthermore, GOOSE information can also be collected through the existing intelligent terminals at the substation site; GOOSE information collected by local devices or intelligent terminals is input into the GOOSE switch and then transmitted to the integrated microcomputer protection device; after receiving the GOOSE information, the integrated microcomputer protection device sends corresponding control instructions to the local devices.

[0010] Furthermore, the interval equipment is connected to the local device, merging unit, and intelligent terminal through electrical hard wiring; optical fiber is used to transmit signals between the local device, merging unit, intelligent terminal and the switch and integrated microcomputer protection device.

[0011] Furthermore, the integrated microcomputer protection device is a local server. The integrated microcomputer protection device is preset with protection logic conditions. When the collected information meets the logic conditions, the control command is directly output to the local device of the corresponding equipment to realize the protection action function.

[0012] Compared with the prior art, the significant progress of the present invention is as follows: 1) The local device is only responsible for collection and execution, and the wiring method is not determined by the protected equipment. The wiring method is fixed, making the protection wiring of the substation simple and clear; 2) The wiring rules of various boards and equipment are determined through the board QR code, making the equipment wiring simple and easy to understand, and convenient for fault finding and maintenance; 3) All protection functions are realized by an integrated microcomputer device, and the protection logic is drawn by visualization, and the protection logic principle is more intuitive and easy to understand. When it is necessary to add a protection function, there is no need to replace the protection device, only to edit the protection action logic, which greatly saves costs.

[0013] In order to more clearly illustrate the functional characteristics and structural parameters of the present invention, further description is given below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0015] Figure 1 It is a schematic diagram of the composition of the on-site device;

[0016] Figure 2 It is the terminal strip definition diagram;

[0017] Figure 3 It is a schematic diagram of the implementation of the integrated microcomputer protection function;

[0018] Figure 4 It is a menu setting diagram of the integrated microcomputer protection device;

[0019] Figure 5 It is a schematic diagram of the protection logic establishment of the integrated microcomputer protection device;

[0020] Figure 6 The present invention is a wiring diagram of an integrated protection system realizing a main transformer differential function in an embodiment;

[0021] Figure 7 The present invention is a schematic diagram of a differential protection logic established by an integrated protection device in an embodiment;

[0022] The reference numerals in the figure are: local device 1, merging unit 2, intelligent terminal 3, integrated microcomputer protection device 6, acquisition board 7, control board 8, operation circuit board 9, CPU communication board 10, remote signal board 11, information QR code 12. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] like Figure 1 As shown, the local device 1 is configured by interval and is responsible for the information collection of each interval of the substation and the execution of the control command of the integrated microcomputer protection device 6. The local device 1 is mainly composed of an acquisition board 7, a control board 8, an operation circuit board 9, a CPU communication board 10, and a remote signal board 11. The local device 1 is configured by interval, regardless of the type of equipment. The local devices 1 of switches, busbars, main transformers and other equipment are all the same, and useless boards in the local device 1 can be removed.

[0025] Specifically, the acquisition board 7 is responsible for collecting the AC measurement information of the equipment, such as voltage, current, etc. The control board 8 is responsible for receiving the control command from the integrated microcomputer protection device 6 and outputting it to the corresponding operation circuit. The operation circuit board 9 is responsible for the control output of the switch and receives the control command of the integrated microcomputer protection device 6 to the switch of this interval. The CPU communication board 10 is responsible for the calculation and communication of the device, as well as the information transmission of each board. The remote signal board 11 is responsible for receiving the access and collection of the remote signal digital signal.

[0026] like Figure 2 As shown, there are wiring information QR codes 12 on the top of the acquisition board 7, the control board 8, the operation circuit board 9, and the remote signal board 11. By scanning the wiring information QR code 12, the terminal row definition specified by the board can be obtained to fix the wiring form.

[0027] like Figure 3 As shown, all protection logic calculation functions of the substation are realized by the integrated microcomputer protection device 6, and the architecture of the integrated microcomputer protection system can refer to the design of the intelligent substation. The acquisition of AC measurement information (SV information) can be collected through the original merging unit 2 (such as the NARI relay protection PCS-22X merging unit), or through the local device 1, input value merging unit SV switch 4, and transmit it to the integrated microcomputer protection device 6. Remote signaling and remote control information (GOOSE information) can be collected through the original intelligent terminal 3 (such as the NARI relay protection PCS-222TU transformer body intelligent terminal), or through the local device 1, input value merging unit GOOSE switch 5, and transmit it to the integrated microcomputer protection device 6. The control commands of the integrated microcomputer protection device 6 to switches, knife switches and other equipment can only be sent to the local device 1 through the GOOSE switch 5.

[0028] Specifically, this interval device is only electrically hardwired with the local device 1, the merging unit 2, and the intelligent terminal 3; optical fiber is used to transmit signals from the local device 1, the merging unit 2, the intelligent terminal 3 to the switch and the integrated microcomputer protection device 6.

[0029] like Figure 4 As shown, the integrated microcomputer protection device 6 sets the protection logic by editing the setting area menu and the logic editing area menu. The establishment of the protection logic can intuitively view all the conditions that constitute the logic. The integrated microcomputer protection device 6 calculates all the edited logic conditions in real time. When the collected information meets the logic conditions, it directly outputs the control command to the corresponding device to realize the protection action function.

[0030] like Figure 5As shown, through the access definition function of the logic editor, the accessed telemetering, telesignaling, remote control, and remote adjustment signals are named and defined according to the device interval, such as 323 switch A phase current, 121 switch control remote control, etc. After completing the naming and definition of the accessed telemetering, telesignaling, remote control, and remote adjustment signals according to the device interval, the logic circuit editing function can be entered. Establish the overcurrent protection logic of the XX switch, select the device and protection, determine it as the overcurrent protection of the XX switch and name it, select the input conditions required for the protection (telemetering 1, telemetering 2, telesignaling 1, calculation condition 1), determine the logical calculation relationship of each input condition, select the fixed value, select the output device, and complete the establishment of a protection logic. After the logic is established, the integrated microcomputer protection device (6) determines whether the XX switch is actuated according to the overcurrent protection logic of the XX switch.

[0031] Example

[0032] like Figure 6 , Figure 7 As shown, the function of the integrated protection system is realized by taking the main transformer differential protection as an example: the principle of the main transformer differential protection is: the input current (I1) on the high voltage side of the main transformer is the same as the output current (I2) converted from the low voltage side to the high voltage side, that is: I1-I2=0. The current measurement is realized by the local device 1 of the switch 301 and the switch 101 on both sides of the main transformer. The local device 1 of the two switches transmits the measured value to the integrated microcomputer protection device 6. The differential protection logic established by the integrated microcomputer protection device 6 is as follows Figure 7 When the current difference (I1-I2) on both sides is greater than the differential protection setting value (0A), the switch 301 and the switch 101 are tripped after a 0S delay. The integrated microcomputer protection device 6 calculates the differential protection logic in real time. If (I1-I2) is greater than the differential protection setting value (0A), the switch 301 and the switch 101 are tripped after a 0S delay to realize the differential protection function.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A substation integrated protection device, characterized in that: The invention comprises a local device (1) and an integrated microcomputer protection device (6); the local device (1) is arranged in each compartment of the substation, and is used to collect AC measurement SV information and remote signal GOOSE information, and is responsible for controlling the opening and closing of the switches of the equipment in the compartment; the integrated microcomputer protection device (6) is used to receive and process the SV information and GOOSE information, and output a control command to the local device (1) according to a preset protection logic, so as to realize the protection action function; The local device (1) comprises a collection board (7), a control board (8), an operation circuit board (9), a CPU communication board (10) and a remote signal board (11); the collection board (7) is responsible for collecting the AC measurement SV information of the equipment; the control board (8) is responsible for receiving the control command from the integrated microcomputer protection device (6) and outputting it to the corresponding operation circuit board (9); the operation circuit board (9) is responsible for the control output of the switch and receiving the control command of the integrated microcomputer protection device (6) to the switch of the interval; the CPU communication board (10) is responsible for the calculation and communication of the device, as well as the information transmission of each board; the remote signal board (11) is responsible for the access and collection of remote signal GOOSE information; The SV information is collected by the existing merging unit (2) at the substation site; the SV information collected by the local device (1) or the merging unit (2) is input into the SV switch (4) and then transmitted to the integrated microcomputer protection device (6); The GOOSE information is collected by the existing intelligent terminal (3) at the substation site; the GOOSE information collected by the local device (1) or the intelligent terminal (3) is input into the GOOSE switch (5) and then transmitted to the integrated microcomputer protection device (6); after receiving the GOOSE information, the integrated microcomputer protection device (6) sends a corresponding control instruction to the local device (1); The acquisition board (7), the control board (8), the operation circuit board (9), and the remote signal board (11) are all provided with a wiring information two-dimensional code (12) on the top of the board. By scanning the wiring information two-dimensional code (12), the terminal row definition specified by each board can be obtained, thereby achieving standardized and unified wiring forms; The partition device is connected to the local device (1), the merging unit (2) and the intelligent terminal (3) through electrical hard wiring; optical fiber is used to transmit signals between the local device (1), the merging unit (2), the intelligent terminal (3) and the switch and the integrated microcomputer protection device (6).

2. A substation integrated protection device according to claim 1, characterized in that: The integrated microcomputer protection device (6) is a local server. The integrated microcomputer protection device (6) is preset with protection logic conditions. When the collected information meets the logic conditions, a control command is directly output to the local device (1) of the corresponding equipment to realize the protection action function.

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