CN203103932U - Configurable busbar differential protection device - Google Patents

Configurable busbar differential protection device Download PDF

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Publication number
CN203103932U
CN203103932U CN 201320106815 CN201320106815U CN203103932U CN 203103932 U CN203103932 U CN 203103932U CN 201320106815 CN201320106815 CN 201320106815 CN 201320106815 U CN201320106815 U CN 201320106815U CN 203103932 U CN203103932 U CN 203103932U
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China
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module
bus
differential protection
central processing
amount
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CN 201320106815
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Chinese (zh)
Inventor
张杭
万尚军
宋立
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NANJING INTELLIGENT APPARATUS CO Ltd
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NANJING INTELLIGENT APPARATUS CO Ltd
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Priority to CN 201320106815 priority Critical patent/CN203103932U/en
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Abstract

The utility model discloses a configurable busbar differential protection device which mainly comprises a central processing module, a plurality of analog acquisition modules, a plurality of input acquisition modules, a plurality of output control modules, a communication module and a display module. The central processing module and the plurality of analog acquisition modules are connected through a TDM (Time Division Multiplexing) bus. The central processing module, the plurality of input acquisition modules, the plurality of output control modules and the communication module are connected through a CAN (Controller Area Network) bus and an RS 485 bus. Input and output setting can be finished by a liquid crystal interface or dedicated configuration software. The analog acquisition modules, the input acquisition modules and the output control modules can be flexibly configured according to different wiring modes of field buses and loop quantity, and therefore the field requirements can be well met; and in addition, the cost can be saved.

Description

A kind of configurable bus differential protection device
Technical field
The utility model relates to bus protection, is the Microcomputer Protection of a kind of visual plant in the electric power system, belongs to power engineering relaying protection automatic field.
Background technology
Bus is the electric equipment that compiles and distribute electric energy, is the equipment that connects important electric equipments such as generator, transformer and circuit, so be very important to the protection of bus.The major function of bus protection be when bus breaks down fast the excision fault, do not cut bus when outside bus, breaking down by mistake.The malfunction of bus protection and tripping will cause serious consequence.The bus protection malfunction will cause large-area power-cuts, and tripping may cause the damage of power equipment and disintegrating of system.The topmost function that realizes bus protection is a bus differential protection, and is exactly fail safe, the reliability of height to the most important requirement of bus differential protection, very strong selectivity and rapidity.Because the mode of connection of bus is a lot, the way amount that takes back alters a great deal, and for flexibility and the saving cost that improves protective device, the extensibility and the configurability of bus differential protection device is proposed very high request.
The utility model content
The utility model utilizes computer technology, high-speed bus technology and software engineering to realize bus differential protection; obtain normal or fault electric weight by gathering busbar voltage, circuit and female connection electric current; obtain bus running manner by gathering on off state; adopt the differential protection fast algorithm; judge the outer fault of bus district inner region, determine fault bus, send trip signal; the excision fault guarantees the reliability of powering.Extensibility and configurability that modularization and the flexibility of this bus differential protection device by hardware modularity, generalization, self-description and software guarantees bus differential protection.
The technical scheme that its technical problem that solves the utility model adopts is:
This device has following part: central processing module, analogue collection module, open into amount acquisition module, the amount of leaving control module, communication module, display module, power module.It is characterized in that: central processing unit, analogue collection module connect by the TDM bus; Central processing module, open into amount acquisition module, the amount of leaving control module, communication module and be connected with the RS485 bus by the CAN bus; Communication module is connected by the RS485 bus with display module.
Central processing module is mainly finished data computation, protection starts and the protection logical process.It is characterized in that: central processing module comprises processor CPU, Programmable Logic Controller FPGA, memory storage SDRAM, flash memory FLASH and multiple bus control unit.
Analogue collection module can be gathered busbar voltage, circuit and female connection electric current.It is characterized in that: analogue collection module comprises voltage or power pack, filter circuit, analog to digital converter AD and FPGA.
Open into the amount acquisition module and can gather circuit breaker position, isolating switch position and protection pressing plate position.It is characterized in that: open into the amount acquisition module and comprise CPU, CAN controller, RS485 bus control unit, optocoupler.
The amount of leaving control module can control circuit breaker deciliter, the ground connection cutter deciliter, send protection action or signal such as unusual.It is characterized in that: the amount of leaving control module comprises CPU, CAN controller, RS485 bus control unit, relay.
Communication module mainly realize Trouble Report processing and with show and the communicating by letter of the external world.It is characterized in that: communication module comprises CPU, FPGA, CAN controller, RS485 bus control unit, RS232 bus control unit, ethernet controller, SDRAM.
Display module is realized analog quantity, the demonstration of switching value and setting and each modules configured of parameter.It is characterized in that: display module comprises CPU, RS485 bus control unit, ethernet controller, SDRAM, liquid crystal.
The beneficial effects of the utility model:
Each on-the-spot bus running manner is different with a way; the analog quantity of require gathering, open leave into amount and tripping operation also different; this bus differential protection device can be by the configuration varying number analogue collection module, open into amount acquisition module, the amount of leaving control module and meet the demands, and can finish by liquid crystal interface or special configuration software and open into, the setting left.
Description of drawings
Fig. 1 is the structured flowchart of the utility model embodiment.
Fig. 2 is the theory diagram of central processing module.
Fig. 3 is the theory diagram of analogue collection module.
Fig. 4 is the theory diagram of opening into the amount acquisition module.
Fig. 5 is the theory diagram of the amount of leaving control module.
Embodiment
Below by specific embodiment the technical solution of the utility model is described further.
This device mainly by central processing module, analogue collection module, open into amount acquisition module, the amount of leaving control module, communication module and display module and form.
As shown in Figure 1, be the system architecture diagram of the utility model embodiment.
Central processing module, analogue collection module connect by the TDM bus.Every analogue collection module can be gathered i.e. 6 the current circuit electric currents of 18 tunnel analog quantitys, can dispose the polylith analogue collection module, and quantity can be determined according to on-the-spot current branch quantity.
Central processing module, open into amount acquisition module, the amount of leaving control module, communication module and be connected with the RS485 bus by the CAN bus.Can dispose polylith and open into amount acquisition module and the amount of leaving control module, quantity can be determined according to on-the-spot bus running manner and current branch quantity.The CAN bus is mainly transmitted and is opened into displacement information and leave control command.The RS485 bus is mainly transmitted various analog quantitys, quantity of state, setting and configuration parameter, and variety of event recorded message and report.
Communication module is connected by the RS485 bus with display module, mainly transmits various analog quantitys, quantity of state, setting and configuration parameter, and variety of event recorded message and report.
As shown in Figure 2, be the theory diagram of the central processing module of the utility model embodiment.
FPGA communicates by letter with the FPGA of analogue collection module by the TDM bus, obtains the AD conversion value (sampled value) of voltage and current; CPU by the CAN bus with open into amount acquisition module and the amount of leaving control module quick exchange switching value data, and exchange non-rapid data by RS485 bus and communication module.
As shown in Figure 3, be the theory diagram of the analogue collection module of the utility model embodiment.
Voltage or electric current are converted to the voltage small-signal by voltage or power pack, and small-signal is sent into AD after by filter circuit, and by the control of FPGA, analog quantity is read into FPGA after being converted to digital quantity by AD, delivers to central processing module by the TDM bus then.
As shown in Figure 4, be the theory diagram opened of the utility model embodiment into the amount acquisition module.
The switching value signal by light-coupled isolation after, through CPU disappear tremble and pack after, be sent to central processing module through the CAN bus.Opening disappears into amount trembles parameter and can obtain from communication module through RS485.
As shown in Figure 5, be the theory diagram of the amount of the leaving control module of the utility model embodiment.
CPU is after the CAN bus obtains control command from central processing module, and after light-coupled isolation, driving, the control corresponding relays is moved.Actuating of relay parameter can be obtained from communication module through RS485.
Though the utility model with preferred embodiment openly as above; but they are not to be used for limiting the utility model; anyly have the knack of this skill person; in the spirit and scope that do not break away from the utility model; can do various variations or retouching from working as, what therefore protection range of the present utility model should be defined with the application's claim protection range is as the criterion.

Claims (12)

1. configurable bus differential protection device, it is characterized in that: it by central processing module, analogue collection module, open into amount acquisition module, the amount of leaving control module, communication module and display module and form, described central processing module, analogue collection module connect by the TDM bus; Described central processing module, open into amount acquisition module, the amount of leaving control module, communication module and be connected with the RS485 bus by the CAN bus; Described communication module is connected by the RS485 bus with display module.
2. configurable bus differential protection device according to claim 1; it is characterized in that: described central processing module is finished data computation, protection starts and the protection logical process, and described central processing module comprises processor CPU, Programmable Logic Controller FPGA, memory storage SDRAM, flash memory FLASH and multiple bus control unit.
3. configurable bus differential protection device according to claim 2 is characterized in that: described Programmable Logic Controller FPGA communicates by letter with the FPGA of analogue collection module by the TDM bus, obtains the AD conversion value of voltage and current; Processor CPU by the CAN bus with open into amount acquisition module and the amount of leaving control module quick exchange switching value data, and exchange non-rapid data by RS485 bus and communication module.
4. configurable bus differential protection device according to claim 1; it is characterized in that: described analogue collection module is gathered busbar voltage, circuit and female connection electric current, and described analogue collection module comprises voltage or power pack, filter circuit, analog to digital converter AD and FPGA.
5. configurable bus differential protection device according to claim 4; it is characterized in that: described busbar voltage or female connection electric current are converted to the voltage small-signal by described voltage or power pack; small-signal is sent into described analog to digital converter AD after by described filter circuit; control by FPGA; analog quantity is read into FPGA after being converted to digital quantity by described analog to digital converter AD, delivers to described central processing module by the TDM bus then.
6. configurable bus differential protection device according to claim 1; it is characterized in that: described opening into the amount acquisition module gathered circuit breaker position, isolating switch position and protection pressing plate position, and described opening into the amount acquisition module comprises CPU, CAN controller, RS485 bus control unit, optocoupler.
7. configurable bus differential protection device according to claim 6 is characterized in that: the switching value signal by described light-coupled isolation after, through CPU disappear tremble and pack after, be sent to central processing module through the CAN bus; Opening disappears into amount trembles parameter and can obtain from communication module through RS485.
8. configurable bus differential protection device according to claim 1; it is characterized in that: the described amount of leaving control module control circuit breaker deciliter, the ground connection cutter deciliter, send protection action or abnormal signal, the described amount of leaving control module comprises CPU, CAN controller, RS485 bus control unit, relay.
9. configurable bus differential protection device according to claim 8 is characterized in that: described CPU is after the CAN bus obtains control command from central processing module, and after light-coupled isolation, driving, the control corresponding relays is moved; Actuating of relay parameter can be obtained from communication module through RS485.
10. configurable bus differential protection device according to claim 1; it is characterized in that: described communication module realize Trouble Report processing and with show and the communicating by letter of the external world that described communication module comprises CPU, FPGA, CAN controller, RS485 bus control unit, RS232 bus control unit, ethernet controller, SDRAM.
11. configurable bus differential protection device according to claim 1; it is characterized in that: described display module is realized analog quantity, the demonstration of switching value and setting and each modules configured of parameter, and described display module comprises CPU, RS485 bus control unit, ethernet controller, SDRAM, liquid crystal.
12. according to the described configurable bus differential protection device of one of claim 1 to 11, it is characterized in that: described analogue collection module can be gathered i.e. 6 the current circuit electric currents of 18 tunnel analog quantitys, can dispose the polylith analogue collection module; Device can dispose polylith and open into amount acquisition module and the amount of leaving control module.
CN 201320106815 2013-03-11 2013-03-11 Configurable busbar differential protection device Active CN203103932U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320106815 CN203103932U (en) 2013-03-11 2013-03-11 Configurable busbar differential protection device

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Application Number Priority Date Filing Date Title
CN 201320106815 CN203103932U (en) 2013-03-11 2013-03-11 Configurable busbar differential protection device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111371178A (en) * 2020-03-13 2020-07-03 山东山大电力技术股份有限公司 Low-voltage protection measurement and control device, system and method with SV output function

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111371178A (en) * 2020-03-13 2020-07-03 山东山大电力技术股份有限公司 Low-voltage protection measurement and control device, system and method with SV output function

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