Fault splitting device applied to terminal substation

Abstract

The utility model relates to a fault splitting device applied to a terminal substation. The fault splitting device comprises a host unit (1), an acquisition unit (2), an execution unit (3) and a communication interface unit (4), the host unit (1) is respectively in communication connection with the acquisition unit (2) and the execution unit (3) through the communication interface unit (4); the acquisition unit (2) acquires a fault bus voltage signal of a transformer substation, the voltage signal is processed and then transmitted to the host unit (1) through the communication interface unit (4), the host unit (1) outputs a tripping signal according to the voltage signal, and the tripping signal is transmitted to the execution unit (3) through the communication interface unit (4). And the execution unit (3) controls the tripping loop and / or the intelligent terminal to trip according to the tripping signal. According to the utility model, the same hardware is used, the requirements of a conventional transformer substation and an intelligent transformer substation can be met simultaneously, the problem of excessive field hardware versions is reduced, and field version management is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of safe and stable control of electric power systems, in particular to a fault disconnecting device applied to a terminal substation. Background Art

[0002] When the electrical connection between the regional power grid and the small power source and the main power grid is lost due to component failure, forming an isolated network, cutting off the connection between the small power source and the regional power grid is an important technical measure to ensure the safe and stable operation of the main power grid and the safe and reliable power supply of the regional power grid. The safety automatic device that distinguishes and disconnects the small power source grid-connected tie line switch based on fault quantities such as the substation and small power source bus voltage amplitude, frequency and zero-sequence voltage amplitude is called a fault disconnecting device.

[0003] The existing fault clearance devices, conventional stations and intelligent stations all use devices with different hardware configurations to implement their functions, resulting in multiple hardware versions of on-site devices and a lot of version maintenance work. Utility Model Content

[0004] The utility model aims to solve at least one technical problem in the background technology and provide a fault disconnecting device applied to a terminal substation.

[0005] To achieve the above-mentioned purpose, the utility model provides a fault separation device applied to a terminal substation, comprising: a host unit, a collection unit, an execution unit and a communication interface unit;

[0006] The host unit is respectively connected to the acquisition unit and the execution unit through the communication interface unit;

[0007] The acquisition unit acquires the fault bus voltage signal of the substation, processes the voltage signal and transmits it to the host unit through the communication interface unit. The host unit outputs a trip signal according to the voltage signal, and transmits the trip signal to the execution unit through the communication interface unit. The execution unit controls the trip circuit and / or the intelligent terminal to trip according to the trip signal.

[0008] According to one aspect of the utility model, the host unit includes: a CPU module, an HMI module, and a panel module;

[0009] The CPU module includes a central processing unit, an industrial-grade CPU chip and an industrial-grade FPGA chip, and the CPU module is provided with a 100M Ethernet debugging interface;

[0010] The HMI module includes a display interface, a communication interface, a timing interface and a printing interface, which are used to manage the printer and the human-machine interface, and the LCD display, keyboard and indicator light are controlled through the panel module;

[0011] The panel module is formed by industrial-grade wide-temperature liquid crystal.

[0012] According to one aspect of the utility model, the communication interface unit comprises: a motherboard module and a power module, the motherboard module is provided with a power bus and a high-speed HSB communication bus;

[0013] The power supply module is connected to each module in the host unit, the acquisition unit and the execution unit through the power bus to supply power to each module in the host unit, the acquisition unit and the execution unit;

[0014] The high-speed HSB communication bus is used for communication connection between modules.

[0015] According to one aspect of the utility model, the acquisition unit includes: a transmission module, an analog sampling module, a first SFP module, a low-pass filter module and an A / D conversion loop module;

[0016] The analog sampling module collects the analog signal in the voltage signal;

[0017] The first SFP module collects a digital signal in the voltage signal;

[0018] The A / D conversion circuit module is electrically connected to the analog sampling module to convert the analog signal collected in the analog sampling module into a digital signal;

[0019] The low-pass filter module is electrically connected to the first SFP module, the A / D conversion circuit module and the transmission module, performs low-pass filtering on the digital signal collected in the first SFP module and the digital signal converted by the A / D conversion circuit module, and then transmits the processed digital signal to the host unit through the transmission module and the communication interface unit.

[0020] According to one aspect of the utility model, the first SFP module includes an FPGA and a 100M fiber optic Ethernet interface;

[0021] The 100M optical fiber Ethernet interface type is an LC interface.

[0022] According to one aspect of the utility model, the execution unit includes: a data receiving module, a DO module and a second SFP module;

[0023] The data receiving module is electrically connected to the DO module and the second SFP module respectively;

[0024] The data receiving module receives the trip signal transmitted through the communication interface unit; and then transmits the trip signal to the DO module and the second SFP module respectively;

[0025] The DO module controls the tripping circuit to drive the related component circuit breaker to trip according to the tripping signal, and the second SFP module sends a tripping command to the intelligent terminal to trip according to the tripping signal.

[0026] According to one aspect of the utility model, the second SFP module includes an FPGA, a memory, and a 100M fiber optic Ethernet interface;

[0027] The 100M optical fiber Ethernet of the second SFP module supports the GOOSE communication protocol.

[0028] According to the solution of the utility model, the fault decoupling device applied to the terminal substation provided by the utility model uses the same hardware, can meet the needs of conventional substations and intelligent substations at the same time, reduce the problem of too many hardware versions on site, simplify on-site version management, ensure that the same hardware can adapt to the needs of conventional stations and intelligent stations at the same time, and ensure that the contact tripping control of conventional stations and the tripping control of intelligent equipment in intelligent stations can be met at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The structure arrangement block diagram of a fault disconnecting device applied to a terminal substation according to an embodiment of the utility model is schematically shown. DETAILED DESCRIPTION

[0030] The present invention will now be discussed with reference to exemplary embodiments. It should be understood that the embodiments discussed are only intended to enable those skilled in the art to better understand and implement the present invention, rather than to imply any limitation on the scope of the present invention.

[0031] As used herein, the term “including” and variations thereof are to be interpreted as open-ended terms meaning “including, but not limited to.” The term “based on” is to be interpreted as “based, at least in part, on.” The terms “one embodiment” and “an embodiment” are to be interpreted as “at least one embodiment.”

[0032] Figure 1 The following is a schematic diagram showing the structural arrangement of a fault disconnection device applied to a terminal substation according to an embodiment of the present utility model. Figure 1 As shown, in this embodiment, the fault separation device applied to the terminal substation includes: a host unit 1, a collection unit 2, an execution unit 3 and a communication interface unit 4;

[0033] The host unit 1 is connected to the acquisition unit 2 and the execution unit 3 through the communication interface unit 4;

[0034] Among them, the collection unit 2 collects the fault bus voltage signal of the substation, processes the voltage signal and transmits it to the host unit 1 through the communication interface unit 4. The host unit 1 calculates and outputs a trip signal based on the voltage signal, and transmits the trip signal to the execution unit 3 through the communication interface unit 4. The execution unit 3 controls the trip circuit and / or the intelligent terminal tripping according to the trip signal.

[0035] Furthermore, if Figure 1 As shown, in this embodiment, the host unit 1 includes: a CPU module 5, an HMI module 6, and a panel module 7;

[0036] The CPU module 5 includes a central processing unit, an industrial-grade CPU chip and an industrial-grade FPGA chip, and the CPU module 5 is provided with a 100M Ethernet debugging interface;

[0037] The HMI module 6 includes a display interface, a communication interface, a timing interface and a printing interface, which are used to manage the printer and the human-machine interface, and to control the LCD display, keyboard and indicator light through the panel module 7;

[0038] The panel module 7 is formed by industrial-grade wide-temperature liquid crystal.

[0039] Furthermore, if Figure 1 As shown, in this embodiment, the communication interface unit 4 includes: a motherboard module 8 and a power module 9, and the motherboard module 8 is provided with a power bus and a high-speed HSB communication bus;

[0040] The power supply module 9 is connected to each module in the host unit 1, the acquisition unit 2 and the execution unit 3 through a power bus to supply power to each module in the host unit 1, the acquisition unit 2 and the execution unit 3;

[0041] High-speed HSB communication bus is used for communication connection between modules.

[0042] Furthermore, if Figure 1 As shown, in this embodiment, the acquisition unit 2 includes: a transmission module 10, an analog sampling module 12, a first SFP module 13, a low-pass filter module 14 and an A / D conversion circuit module 15;

[0043] The analog sampling module 12 collects analog signals in the voltage signal;

[0044] The first SFP module 13 collects the digital signal in the voltage signal;

[0045] The A / D conversion circuit module 15 is electrically connected to the analog sampling module 12 to convert the analog signal collected in the analog sampling module 12 into a digital signal;

[0046] The low-pass filter module 14 is electrically connected to the first SFP module 13, the A / D conversion circuit module 15 and the transmission module 10, performs low-pass filtering on the digital signal collected in the first SFP module 13 and the digital signal converted by the A / D conversion circuit module 15, and then transmits the processed digital signal to the host unit 1 through the transmission module 10 and the communication interface unit 4.

[0047] Furthermore, if Figure 1 As shown, in this embodiment, the first SFP module 13 includes an FPGA and a 100M fiber optic Ethernet interface;

[0048] The 100M fiber-optic Ethernet interface type is an LC interface.

[0049] Furthermore, if Figure 1 As shown, in this embodiment, the execution unit 3 includes: a data receiving module 11, a DO module 16 and a second SFP module 17;

[0050] The data receiving module 11 is electrically connected to the DO module 16 and the second SFP module 17 respectively;

[0051] The data receiving module 11 receives the trip signal transmitted through the communication interface unit 4; and then transmits the trip signal to the DO module 16 and the second SFP module 17 respectively;

[0052] The DO module 16 controls the tripping circuit to drive the circuit breaker of the related component to trip according to the tripping signal, and the second SFP module 17 sends a tripping command to the intelligent terminal to trip according to the tripping signal.

[0053] Furthermore, if Figure 1 As shown, in this embodiment, the second SFP module 17 includes an FPGA, a memory, and a 100M optical fiber Ethernet interface;

[0054] The 100M optical fiber Ethernet of the second SFP module 17 supports the GOOSE communication protocol.

[0055] According to the above scheme of the utility model, the fault decoupling device applied to the terminal substation provided by the utility model uses the same hardware, can meet the needs of conventional substations and intelligent substations at the same time, reduce the problem of too many hardware versions on site, simplify the on-site version management, ensure that the same hardware can adapt to the needs of conventional stations and intelligent stations at the same time, and ensure that the contact tripping control of conventional stations and the tripping control of intelligent equipment in intelligent stations can be met at the same time.

[0056] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the utility model.

Claims

1. A fault disconnecting device applied to a terminal substation, characterized in that: include: A host unit (1), a collection unit (2), an execution unit (3) and a communication interface unit (4); The host unit (1) is communicatively connected to the acquisition unit (2) and the execution unit (3) respectively via the communication interface unit (4); The acquisition unit (2) acquires a fault bus voltage signal of the substation, processes the voltage signal, and transmits it to the host unit (1) through the communication interface unit (4); the host unit (1) outputs a trip signal according to the voltage signal, and transmits the trip signal to the execution unit (3) through the communication interface unit (4); the execution unit (3) controls the trip circuit and / or the intelligent terminal to trip according to the trip signal.

2. The fault disconnecting device applied to the terminal substation according to claim 1 is characterized in that: The host unit (1) comprises: a CPU module (5), an HMI module (6), and a panel module (7); The CPU module (5) comprises a central processing unit, an industrial-grade CPU chip and an industrial-grade FPGA chip, and the CPU module (5) is provided with a 100M Ethernet debugging interface; The HMI module (6) includes a display interface, a communication interface, a time synchronization interface and a printing interface, and is used to manage a printer and a human-machine interface, and to control a liquid crystal display, a keyboard and an indicator light through the panel module (7); The panel module (7) is formed by using industrial-grade wide-temperature liquid crystal.

3. The fault disconnecting device applied to the terminal substation according to claim 1 is characterized in that: The communication interface unit (4) comprises: a motherboard module (8) and a power module (9); the motherboard module (8) is provided with a power bus and a high-speed HSB communication bus; The power supply module (9) is connected to each module in the host unit (1), the acquisition unit (2) and the execution unit (3) through the power supply bus, and supplies power to each module in the host unit (1), the acquisition unit (2) and the execution unit (3); The high-speed HSB communication bus is used for communication connection between modules.

4. The fault disconnecting device applied to the terminal substation according to claim 1 is characterized in that: The acquisition unit (2) comprises: a transmission module (10), an analog sampling module (12), a first SFP module (13), a low-pass filter module (14) and an A / D conversion circuit module (15); The analog sampling module (12) collects the analog signal in the voltage signal; The first SFP module (13) collects a digital signal in the voltage signal; The A / D conversion circuit module (15) is electrically connected to the analog sampling module (12) to convert the analog signal collected in the analog sampling module (12) into a digital signal; The low-pass filter module (14) is electrically connected to the first SFP module (13), the A / D conversion circuit module (15) and the transmission module (10), performs low-pass filtering on the digital signal collected in the first SFP module (13) and the digital signal converted by the A / D conversion circuit module (15), and then transmits the processed digital signal to the host unit (1) through the transmission module (10) and the communication interface unit (4).

5. The fault disconnecting device applied to the terminal substation according to claim 4 is characterized in that: The first SFP module (13) comprises an FPGA and a 100M optical fiber Ethernet interface; The 100M optical fiber Ethernet interface type is an LC interface.

6. The fault disconnecting device applied to a terminal substation according to any one of claims 1 to 5, characterized in that: The execution unit (3) comprises: a data receiving module (11), a DO module (16) and a second SFP module (17); The data receiving module (11) is electrically connected to the DO module (16) and the second SFP module (17) respectively; The data receiving module (11) receives the trip signal transmitted through the communication interface unit (4); and then transmits the trip signal to the DO module (16) and the second SFP module (17) respectively; The DO module (16) controls the tripping circuit to drive the relevant component circuit breaker to trip according to the tripping signal, and the second SFP module (17) sends a tripping command to the intelligent terminal to perform tripping according to the tripping signal.

7. The fault disconnecting device applied to the terminal substation according to claim 6 is characterized in that: The second SFP module (17) comprises an FPGA, a memory, and a 100M optical fiber Ethernet interface; The 100M optical fiber Ethernet of the second SFP module (17) supports the GOOSE communication protocol.

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