CN209767236U - Short lead protection device - Google Patents
Short lead protection device Download PDFInfo
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- CN209767236U CN209767236U CN201920712246.XU CN201920712246U CN209767236U CN 209767236 U CN209767236 U CN 209767236U CN 201920712246 U CN201920712246 U CN 201920712246U CN 209767236 U CN209767236 U CN 209767236U
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Abstract
The utility model discloses a short lead protection device, which comprises a device box body, a motherboard module, a power module, a DIO interface module, a CPU plug-in and an AC plug-in which are arranged in the device box body; the motherboard module is provided with an analog quantity bus, an SPI communication bus and a power bus; the power supply module supplies power to other modules and plug-ins through a power bus; the alternating current plug-in comprises a current transformer for collecting secondary side currents of the side switch and the middle switch CT; the CPU plug-in comprises a main control module, a CC module and a man-machine management module which are communicated with each other; the CC module comprises a GOOSE data interface, and the man-machine management module comprises a monitoring protection communication interface; the main control module is communicated with the DIO interface module and the alternating current plug-in unit through the SPI bus and the analog quantity bus respectively; the device box body comprises a panel provided with a plurality of signal connectors; the power input interface of the power module, the input/output interface of the DIO interface module, the GOOSE data interface and the monitoring protection communication interface of the CPU plug-in unit and the alternating current signal acquisition interface of the AC plug-in unit communicate with the outside through the signal connector.
Description
Technical Field
The utility model relates to an electric power system relay protection equipment technical field, especially a short lead protection device.
Background
3/2 wiring modes are widely adopted in 500 kV transformer substations, and short lead protection is usually configured in a mode of configuring an isolation disconnecting link for outgoing lines. The protection range of the short lead protection is that the section of leads of a CT and an outgoing disconnecting link in a breaker string are in a 3/2 connection mode, the CT is not configured on the outgoing line of a general line, and after the line is quitted from operation and the breaker needs to be in loop closing operation, the protection of the leads between a switch on the string and a middle switch is completed through the short lead differential protection. After the circuit is put into operation, the protection of the lead and the circuit is finished by the circuit protection, at the moment, the short lead protection needs to be quitted from operation, otherwise, under normal operation or when the circuit breaks down, the short lead differential protection meets the action condition, and misoperation can be caused.
The traditional short lead protection device realizes the switching-on and switching-off by the auxiliary contact of the disconnecting link, and the protection automatically exits after the disconnecting link separating contact returns. Therefore, a set of short lead protection needs to be configured on the lead between the upper switch and the middle switch of each section of string in the transformer substation, and the short lead protection is in a quitting state when the line normally runs in most time, so that the waste of equipment resources is caused.
Disclosure of Invention
The utility model aims at providing a short lead wire protection device can simplify putting up and demolising of protection system to can practice thrift the protective apparatus input cost at the different on-the-spot cyclic utilization of different transformer substations.
the utility model discloses the technical scheme who takes does: a short lead protection device comprises a device box body, a motherboard module, a power module, a DIO interface module, a CPU plug-in and an alternating current plug-in, wherein the motherboard module, the power module, the DIO interface module, the CPU plug-in and the alternating current plug-in are arranged in the device box body;
An analog quantity bus, an SPI communication bus and a power bus are arranged in the motherboard module; the power output end of the power supply module supplies power to the DIO interface module, the CPU plug-in and the alternating current plug-in through a power bus of the motherboard module;
The DIO interface module comprises a DIO module, an SPI bus interface and an input-output interface; the DIO module is connected with the SPI bus through an SPI bus interface;
The alternating current plug-in comprises an analog quantity bus interface used for connecting the analog quantity bus and a current transformer used for collecting secondary side currents of the side switch and the middle switch CT;
the CPU plug-in comprises a main control module, a CC module, a man-machine management module, an SPI bus interface and an analog quantity interface; the CC module comprises a GOOSE data interface, and the man-machine management module comprises a monitoring protection communication interface; the CC module and the man-machine management module are respectively connected and communicated with the main control module, and the main control module is respectively connected with the SPI bus and the analog bus through the SPI bus interface and the analog interface so as to communicate with the DIO interface module and the alternating current plug-in unit;
The device box body comprises a panel, and a plurality of signal connectors are arranged on the panel; the power input interface of the power module, the input/output interface of the DIO interface module, the GOOSE data interface and the monitoring protection communication interface of the CPU plug-in unit, and the current transformer of the AC plug-in unit communicate with the outside through the signal connector.
The utility model discloses aim at realizing integrative portable design through each current functional module of integration in the box, do not need to screen the installation again when using, the dismouting work of each functional module need not be considered, signal connector's setting makes things convenient for on-the-spot wiring, secondary circuit wiring is simple, and the function is clear and definite, short lead wire protection only need drop into on three wiring clusters of two halves when circuit or transformer withdraw from operation and adjacent circuit breaker close the ring operation, consequently adopt portable design device can be at the different on-the-spot repeated cyclic utilization of different transformer substations, be applicable to tradition and intelligent substation simultaneously, the protective apparatus purchasing cost has been practiced thrift greatly, good application prospect has.
Preferably, in the CPU plug-in, the main control module is provided with an a/D conversion circuit, an FPGA chip, a central processing unit, and a negative power supply start circuit; the A/D conversion circuit collects analog quantity data output by the alternating current plug-in unit through an analog quantity bus interface, converts the analog quantity data into digital quantity and transmits the digital quantity to the central processing unit; the FPGA chip receives and transmits open-in and open-out data between the SPI bus interface and the DIO interface module, the central processing unit executes protection operation and control based on open-in data and alternating current sampling data, forwards an open-out signal to the DIO interface module through the FPGA chip, and starts a negative power supply for realizing a fault processing function and opening a protection outlet relay through a negative power supply starting circuit.
Preferably, in the CPU plug-in, the CC module is provided with an FPGA chip and a plurality of 100BASE-FX ethernet SFP interfaces for transceiving GOOSE data; and the CC module is communicated with the main control module through the FPGA chip so as to realize the opening and the closing of the GOOSE. And the CC module is connected with an external intelligent terminal through an SFP interface and realizes the functions of short lead digital tripping, overcurrent long-trip and the like by using GOOSE data.
preferably, in the CPU plug-in, the man-machine management module is provided with a controller, a monitoring protection communication interface, a man-machine conversation display circuit, a remote operation and signal resetting weak current loop, and a GPS time setting loop; the CPU plug-in is connected and communicated with a central processing unit of the main control module through the controller so as to exchange protection information; the controller is connected and communicated with the MMS station control layer monitoring system and the protection information substation through the monitoring protection communication interface, and controls the protection device of the protection information substation to realize the remote operation function and the signal resetting function through the remote operation and signal resetting weak current loop according to the received monitoring and protection information. The man-machine conversation display circuit is used for realizing man-machine management of the protection device and a user, and the GPS time synchronization loop is used for device time synchronization.
Preferably, the DIO module is a DIO module configured with an optical coupling and isolation circuit. The data of the CPU module which is input and output is transmitted and received with the DIO module through the SPI bus of the motherboard module, and the DI (switching value input) and the DO (switching value output) are transmitted through the optical coupling isolation circuit.
Preferably, the power module and the DIO interface module are integrated in a power plug-in unit together, and communicate with the outside through the same signal connector.
preferably, the GOOSE data interface and the monitoring protection communication interface of the CPU card, and the AC signal acquisition interface of the AC card communicate with the external link through a signal connector, respectively. The wiring of the secondary circuit can be clearer, and the construction difficulty of a protection system is reduced.
Preferably, the signal connector is an aerial plug.
preferably, the device box body is a portable draw-bar box. Have the portability, the convenient removal further makes the utility model discloses a protection device is applicable to interim the use.
Advantageous effects
Compared with the prior art, the utility model has the advantages of it is following and progress:
(1) The device supports various information access forms, is suitable for the traditional transformer substation and the intelligent transformer substation, has a wide application range and has a good application prospect;
(2) The device can be repeatedly used on different short leads of the transformer substation, and even can be temporarily used on different fields of different transformer substations, so that the purchase cost of the protection equipment is greatly saved;
(3) the device interface adopts a high-quality standard aviation plug, and adopts a prefabricated cable to realize standardized connection and plug and play between primary and secondary equipment, so that debugging and installation are facilitated;
(4) The device structure adopts portable design, can put into use temporarily when needing, does not need the installation of group screen, easily builds and demolishs, satisfies the requirement of transformer substation's scene to interim protection.
drawings
Fig. 1 is a schematic diagram of the hardware structure of the present invention.
Detailed Description
The following further description is made in conjunction with the accompanying drawings and the specific embodiments.
Referring to fig. 1, the short lead protection device of the present invention includes a device case, and a motherboard module, a power module, a DIO interface module, a CPU card and an ac card installed in the device case;
an analog quantity bus, an SPI communication bus and a power bus are arranged in the motherboard module; the power output end of the power supply module supplies power to the DIO interface module, the CPU plug-in and the alternating current plug-in through a power bus of the motherboard module;
The DIO interface module comprises a DIO module, an SPI bus interface and an input-output interface; the DIO module is connected with the SPI bus through an SPI bus interface;
The alternating current plug-in comprises an analog quantity bus interface used for connecting the analog quantity bus and a current transformer used for collecting secondary side currents of the side switch and the middle switch CT;
The CPU plug-in comprises a main control module, a CC module, a man-machine management module, an SPI bus interface and an analog quantity interface; the CC module comprises a GOOSE data interface, and the man-machine management module comprises a monitoring protection communication interface; the CC module and the man-machine management module are respectively connected and communicated with the main control module, and the main control module is respectively connected with the SPI bus and the analog bus through the SPI bus interface and the analog interface so as to communicate with the DIO interface module and the alternating current plug-in unit;
The device box body comprises a panel, and a plurality of signal connectors are arranged on the panel; the power input interface of the power module, the input/output interface of the DIO interface module, the GOOSE data interface and the monitoring protection communication interface of the CPU plug-in unit, and the current transformer of the AC plug-in unit communicate with the outside through the signal connector.
the utility model discloses aim at realizing integrative portable design through each current functional module of integration in the box, do not need to screen the installation again when using, the dismouting work of each functional module need not be considered, signal connector's setting makes things convenient for on-the-spot wiring, secondary circuit wiring is simple, and the function is clear and definite, short lead wire protection only need drop into on three wiring clusters of two halves when circuit or transformer withdraw from operation and adjacent circuit breaker close the ring operation, consequently adopt portable design device can be at the different on-the-spot repeated cyclic utilization of different transformer substations, be applicable to tradition and intelligent substation simultaneously, the protective apparatus purchasing cost has been practiced thrift greatly, good application prospect has.
The main control module, the man-machine management module and the CC module in the CPU plug-in respectively adopt the prior art to realize the corresponding communication control function.
examples
In the embodiment shown in fig. 1, the short lead protection device includes a power supply card, a CPU card, an ac card, and a motherboard module, the power supply card integrates a DIO interface module and a power supply module, wherein the DIO interface module is connected to the CPU module through an SPI bus; the CPU plug-in integrates a main control module, a man-machine management module and a CC module, wherein the CC module is directly connected with the main control module, and the man-machine management module is directly connected with the main control module; the alternating current plug-in is connected with the CPU module through an analog quantity bus; the motherboard module is a communication carrier of other plug-ins, and the power plug-ins, the CPU plug-ins and the AC plug-ins are all plugged on the motherboard module and supply power to the whole device by the power plug-ins; the power supply plug-in, the CPU plug-in and the alternating current plug-in are externally connected through the aviation plug fixed on the panel of the device, and the functions of sampling the alternating current, opening and closing the protection function, debugging and managing the device and the like are achieved.
The power module provides power for the whole short lead protection device through the motherboard;
In the CPU plug-in, the main control module is provided with an A/D conversion circuit, an FPGA chip, a central processing unit and a negative power supply starting circuit; the A/D conversion circuit collects analog quantity data output by the alternating current plug-in unit through an analog quantity bus interface, converts the analog quantity data into digital quantity and transmits the digital quantity to the central processing unit; the FPGA chip receives and transmits open-in and open-out data between the SPI bus interface and the DIO interface module, the central processing unit executes protection operation and control based on open-in data and alternating current sampling data, forwards an open-out signal to the DIO interface module through the FPGA chip, and starts a negative power supply for realizing a fault processing function and opening a protection outlet relay through a negative power supply starting circuit.
In the CPU plug-in, the CC module is provided with an FPGA chip and a plurality of 100BASE-FX Ethernet fiber SFP interfaces for receiving and transmitting GOOSE data; and the CC module is communicated with the main control module through the FPGA chip so as to realize the opening and the closing of the GOOSE. And the CC module is connected with an external intelligent terminal through an SFP interface and realizes the functions of short lead digital tripping, overcurrent long-trip and the like by using GOOSE data.
In the CPU plug-in, the man-machine management module is provided with a controller, a monitoring protection communication interface, a man-machine conversation display circuit, a remote operation and signal resetting weak current loop and a GPS time setting loop; the CPU plug-in is connected and communicated with a central processing unit of the main control module through the controller so as to exchange protection information; the controller is connected and communicated with the MMS station control layer monitoring system and the protection information substation through the monitoring protection communication interface, and controls the protection device of the protection information substation to realize the remote operation function and the signal resetting function through the remote operation and signal resetting weak current loop according to the received monitoring and protection information. The man-machine conversation display circuit is used for realizing man-machine management of the protection device and a user, and the GPS time synchronization loop is used for device time synchronization.
The DIO module is a DIO module provided with an optical coupling isolation circuit. The data of the CPU module which is input and output is transmitted and received with the DIO module through the SPI bus of the motherboard module, and the DI (switching value input) and the DO (switching value output) are transmitted through the optical coupling isolation circuit.
The device box body is a portable draw-bar box. The portable and convenient mobile device is convenient to move. The power supply plug-in, the CPU plug-in and the AC plug-in correspond to an aviation plug respectively, the internal and external connecting cables and optical fibers are all connected with the corresponding aviation plugs respectively in a junction mode, the aviation plugs are installed on a front panel of the device, and the device is arranged in the portable draw-bar box.
the foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.
Claims (8)
1. A short lead protection device is characterized by comprising a device box body, a motherboard module, a power supply module, a DIO interface module, a CPU plug-in and an alternating current plug-in, wherein the motherboard module, the power supply module, the DIO interface module, the CPU plug-in and the alternating current plug-in are arranged in the device box body;
An analog quantity bus, an SPI communication bus and a power bus are arranged in the motherboard module; the power output end of the power supply module supplies power to the DIO interface module, the CPU plug-in and the alternating current plug-in through a power bus of the motherboard module;
The DIO interface module comprises a DIO module, an SPI bus interface and an input-output interface; the DIO module is connected with the SPI bus through an SPI bus interface;
The alternating current plug-in comprises an analog quantity bus interface used for connecting the analog quantity bus and a current transformer used for collecting secondary side currents of the side switch and the middle switch CT;
The CPU plug-in comprises a main control module, a CC module, a man-machine management module, an SPI bus interface and an analog quantity interface; the CC module comprises a GOOSE data interface, and the man-machine management module comprises a monitoring protection communication interface; the CC module and the man-machine management module are respectively connected and communicated with the main control module, and the main control module is respectively connected with the SPI bus and the analog bus through the SPI bus interface and the analog interface so as to communicate with the DIO interface module and the alternating current plug-in unit;
the device box body comprises a panel, and a plurality of signal connectors are arranged on the panel; the power input interface of the power module, the input/output interface of the DIO interface module, the GOOSE data interface and the monitoring protection communication interface of the CPU plug-in unit, and the current transformer of the AC plug-in unit communicate with the outside through the signal connector.
2. The short lead protection device of claim 1, wherein in the CPU card, the main control module is provided with an a/D conversion circuit, an FPGA chip, a central processing unit, and a negative power supply start circuit; the A/D conversion circuit collects analog quantity data output by the alternating current plug-in unit through an analog quantity bus interface, converts the analog quantity data into digital quantity and transmits the digital quantity to the central processing unit; the FPGA chip receives and transmits open-in and open-out data between the SPI bus interface and the DIO interface module, the central processing unit executes protection operation and control based on open-in data and alternating current sampling data, forwards an open-out signal to the DIO interface module through the FPGA chip, and starts a negative power supply for realizing a fault processing function and opening a protection outlet relay through a negative power supply starting circuit.
3. The short lead protection device of claim 1, wherein in the CPU card, the CC module is provided with an FPGA chip and a plurality of 100BASE-FX ethernet SFP interfaces for transceiving GOOSE data; and the CC module is communicated with the main control module through the FPGA chip so as to realize the opening and the closing of the GOOSE.
4. The short lead protection device of claim 1, wherein in the CPU card, the human-machine management module is provided with a controller, a monitoring protection communication interface, a human-machine conversation display circuit, a remote operation and signal return weak current loop, and a GPS time setting loop; the CPU plug-in is connected and communicated with a central processing unit of the main control module through the controller so as to exchange protection information; the controller is connected and communicated with the MMS station control layer monitoring system and the protection information substation through the monitoring protection communication interface, and controls the protection device of the protection information substation to realize the remote operation function and the signal resetting function through the remote operation and signal resetting weak current loop according to the received monitoring and protection information.
5. the short lead protection device of claim 1, wherein said DIO module is a DIO module configured with an optically coupled isolation circuit.
6. The short lead protection device of claim 1, wherein said power module and DIO interface module are integrated together in a power plug-in and communicate with the outside through the same signal connector.
7. The short lead protection device of claim 1, wherein said signal connector is an aircraft plug.
8. The short lead protection device of claim 1, wherein said device housing is a portable trolley case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920712246.XU CN209767236U (en) | 2019-05-17 | 2019-05-17 | Short lead protection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920712246.XU CN209767236U (en) | 2019-05-17 | 2019-05-17 | Short lead protection device |
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| CN209767236U true CN209767236U (en) | 2019-12-10 |
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| CN201920712246.XU Active CN209767236U (en) | 2019-05-17 | 2019-05-17 | Short lead protection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112260239A (en) * | 2020-10-12 | 2021-01-22 | 南方电网数字电网研究院有限公司 | Chip compact relay protection device |
-
2019
- 2019-05-17 CN CN201920712246.XU patent/CN209767236U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112260239A (en) * | 2020-10-12 | 2021-01-22 | 南方电网数字电网研究院有限公司 | Chip compact relay protection device |
| CN112260239B (en) * | 2020-10-12 | 2023-06-27 | 南方电网数字电网研究院有限公司 | Chip compact relay protection device |
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