CN201656455U - Low-current grounding line selection device based on FT3 transport protocol - Google Patents

Low-current grounding line selection device based on FT3 transport protocol Download PDF

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Publication number
CN201656455U
CN201656455U CN2009202464429U CN200920246442U CN201656455U CN 201656455 U CN201656455 U CN 201656455U CN 2009202464429 U CN2009202464429 U CN 2009202464429U CN 200920246442 U CN200920246442 U CN 200920246442U CN 201656455 U CN201656455 U CN 201656455U
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CN
China
Prior art keywords
pci bus
host
line selection
speed serial
described
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CN2009202464429U
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Chinese (zh)
Inventor
齐郑
李岩松
李砚
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北京丹华昊博电力科技有限公司
华北电力大学
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Priority to CN2009202464429U priority Critical patent/CN201656455U/en
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Publication of CN201656455U publication Critical patent/CN201656455U/en

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Abstract

The utility model discloses a low-current grounding line selection device based on FT3 transport protocol; a single-phase grounding fault line selection device is composed of a high-speed serial port read module and a host machine, the high-speed serial port read module is inserted in a PCI insertion groove of a bottom plate of the host machine, and the host machine is arranged in a host machine case; the high-speed serial port read module comprises an optical-electrical conversion interface, an embedded type CPU processing module and a PCI bus driving module; wherein the input end of the optical-electrical conversion interface is connected with an optical fiber, an optical fiber input signal is converted into an electrical signal, and the output end of the optical-electrical conversion interface is connected with the input end of the embedded type CPU processing module; the output end of the embedded type CPU processing module is connected to the PCI bus by the PCI bus driving module, and the PCI bus is connected with the host machine CPU; the line selection information is transmitted to an automation background of the transformer substation through ethernet network by the device; in the low-current grounding line selection device, the technology is mature, the reliability is high and the device can meet local practical requirements.

Description

Small Electric Current Earthing And Routing Device based on the FT3 host-host protocol

Technical field

The utility model belongs to a kind of power technology and equipment, is applicable to 3~60kV digital transformer substation, can carry out accurate route selection to single phase ground fault.

Background technology

China 3~60kV power distribution network extensively adopts the neutral non-effective grounding mode, is called small current neutral grounding system again, and the fault overwhelming majority of small current neutral grounding system is a single phase ground fault.When single phase ground fault took place, earth current was very little, can continue operation 1~2 hour under failure condition, but must find faulty line as early as possible, and this has just proposed the failure line selection problem.

At present traditional microcomputer type line selection apparatus is comparative maturity, and its basic principle is that residual voltage and zero sequence current signal that the outside is inserted are carried out the AD sampling, carries out computing then.Development along with new-style electronic instrument transformer technology, intelligent switch technology and the network communications technology, the digital transformer substation technology that turns to principal character with primary equipment intellectuality, secondary device network becomes the technology main flow, and the inapplicable and digital transformer substation of traditional microcomputer type line selection apparatus.In digital transformer substation; low-current ground fault line selection device need utilize the zero-sequence current of all circuits and the residual voltage of bus; have characteristics such as at interval many, real-time property requirement height, data traffic are big, thus its to develop difficulty much bigger with respect to other numerical protections.

Summary of the invention

The purpose of this utility model is the deficiency that overcomes on the prior art, proposes to be applicable to the line selection apparatus implementation of digital transformer substation, has filled up the blank of domestic and international correlative technology field.

The technical solution of the utility model is as follows:

A kind of single-phase grounded malfunction in grounded system of low current line selection apparatus, this single-phase earth fault line selection device is made up of high speed serial ports read module and two parts of main frame, described high speed serial ports read module is plugged on the PCI slot of host backplane, and described main frame is installed in the mainframe box; It is characterized by:

Described high speed serial ports read module comprises light-electric translation interface, embedded type CPU processing module, and pci bus driver module; Wherein the input of light-electric translation interface connects optical fiber, and the optical fiber input signal is converted to the signal of telecommunication, and the output of described light-electric translation interface links to each other with the input of described embedded type CPU processing module;

The output of described embedded type CPU processing module is connected on the pci bus by described pci bus driver module, and described pci bus links to each other with host CPU.

Wherein light-electric translation interface can be converted to the signal of telecommunication with the optical fiber input signal, handles for CPU; The embedded type CPU processing module can read received serial data and parse zero-sequence current and the residual voltage data that route selection needs according to the high speed serialization FT3 transport protocol standard of stipulating in the IEC 60044-8 host-host protocol; The pci bus driver module can send to zero-sequence current and the residual voltage data after resolving on the pci bus, sends host CPU to according to bus standard and handles.Described main frame is an industrial control computer, comprises PCI base plate, mainboard, liquid crystal, electronic hard disc, internal memory.Wherein mainboard and high speed serial ports read module carry out data interaction by the standard pci bus of base plate, and mainboard possesses Ethernet interface simultaneously, and main frame is connected with automation of transformation substations backstage by netting twine, reports the route selection result.

Single-phase earth fault line selection device of the present utility model uses at digital transformer substation specially, belongs to an equipment of wall, carries out data interaction with process layer and substation level.Line selection apparatus need not the AD sampling element, directly inserts the digital signal of electronic type voltage transformer and electronic current mutual inductor, utilizes pci bus that digital signal is sent to CPU and calculates.Algorithm routine adopts the patented technology (patent name: low current neutral grounding electric network single-phase earth fault line selection apparatus of our company; The patent No.: ZL200320126180.5), use multiple selection method and merge mutually and carry out comprehensive route selection, can be at metallic earthing, through arcing ground, accurately select faulty line through various situations such as transition grounding through resistances.

Advantage of the present utility model is as follows:

1, is applicable to digital transformer substation.

2, favorable expandability has the multi-channel optical fibre input interface, satisfies the demand of transformer station.

3, integrated level height, all integrated circuit boards of line selection apparatus are integrated in the cabinet.

4, adopt pci bus, have data-handling capacity at a high speed.

5, main frame possesses network interface, can upload route selection information by Ethernet.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the schematic diagram of high speed serial ports read module;

Fig. 3 is the schematic diagram of light-electric translation interface;

Fig. 4 is the schematic diagram of embedded type CPU processing module;

Fig. 5 is the schematic diagram of pci bus driver module.

Embodiment

Below in conjunction with accompanying drawing, the technical solution of the utility model is described in further detail by concrete enforcement.

Single-phase earth fault line selection device of the present utility model uses at digital transformer substation specially, belongs to an equipment of wall, carries out data interaction with process layer and substation level.Line selection apparatus need not the AD sampling element, directly inserts the digital signal of electronic type voltage transformer and electronic current mutual inductor, utilizes pci bus that digital signal is sent to CPU and calculates.Algorithm routine adopts the patented technology (patent name: low current neutral grounding electric network single-phase earth fault line selection apparatus of our company; The patent No.: ZL200320126180.5), use multiple selection method and merge mutually and carry out comprehensive route selection, can be at metallic earthing, through arcing ground, accurately select faulty line through various situations such as transition grounding through resistances.

The single-phase earth fault line selection device is made up of high speed serial ports read module and two parts of main frame.Described high speed serial ports read module comprises light-electric translation interface, embedded type CPU processing module, and pci bus driver module.Wherein light-electric translation interface can be converted to the signal of telecommunication with the optical fiber input signal, handles for CPU; The embedded type CPU processing module can read received serial data and parse zero-sequence current and the residual voltage data that route selection needs according to the high speed serialization FT3 transport protocol standard of stipulating in the IEC 60044-8 host-host protocol; The pci bus driver module can send to zero-sequence current and the residual voltage data after resolving on the pci bus, sends host CPU to according to bus standard and handles.High speed serial ports read module is plugged on the PCI slot of host backplane, is installed in the mainframe box.

Described main frame is an industrial control computer, comprises PCI base plate, mainboard, liquid crystal, electronic hard disc, internal memory.Wherein mainboard and high speed serial ports read module carry out data interaction by the standard pci bus of base plate, and mainboard possesses Ethernet interface simultaneously, and main frame is connected with automation of transformation substations backstage by netting twine, reports the route selection result.

As shown in Figure 1, line selection apparatus is positioned at wall, the electronic current mutual inductor and the electronic type voltage transformer that are positioned at the process layer collect the electric current at each interval and the digital signal of voltage, this digital signal is sent to line selection apparatus by the high speed serialization FT3 transport protocol standard of stipulating in the IEC 60044-8 host-host protocol, and transmission medium is an optical fiber.D1 to Dn represents high speed serial ports read module, line selection apparatus adopts light-power conversion technology that the light signal that receives is converted to the signal of telecommunication, utilize the high speed serial ports to read the technology reading of data and parse useful data, data enter CPU by pci bus and calculate and accurately select faulty line.Line selection apparatus can be uploaded to route selection information the automation backstage of substation level by Ethernet.

High speed serial ports read module principle is positioned at line selection apparatus as shown in Figure 2, can accept multipath light signal simultaneously.Every road light signal is connected on the optical-electrical converter by optical fiber, and light signal is converted to the signal of telecommunication, passes through signal of telecommunication drive circuit again with signal shaping, is input to the embedded type CPU processing module again.Afterwards, the pretreated one group of signal of received process is transferred on the pci bus, is input among the CPU by pci bus and handles through the pci bus driver module.

Light-electric translation interface principle is arranged in high speed serial ports read module as shown in Figure 3, is his first's circuit.Be connected on the optical-electrical converter HFBR2412 by optical fiber, wherein the 2nd pin of HFBR2412 is connected on the 5V positive supply; The 3rd and 7 pin are connected to power supply on the ground; The 6th pin is connected on the 5V positive supply by 500 Ohmic resistances.Wherein, the 6th pin is the electrical signal data output, is connected on 7406 the 1st pin.7406 the 7th with 14 pin be connected respectively the 5V positive supply and ground; 7406 the 2nd pin output is the final output of light-electric translation interface.

Embedded type CPU processing module principle is arranged in high speed serial ports read module as shown in Figure 4, is his second portion circuit, receives the output signal of light-electric translation interface.The signal that is received is input on the 21st pin of single-chip microcomputer 8051F310.Each road light-electric conversion interface circuit is all received on the 21st pin of independent a slice 8051F310.8051F310 is converted to the specific format data with received high-speed serial data, by the 27th pin be input to dsp chip TMS320F2812 last 92 (93,94 ..., 104) on the pin, the output pin of a plurality of 8051F310 is received TMS320F2812 respectively and is gone up on the different pins.

Pci bus driver module principle in high speed serial ports read module, is his third part circuit as shown in Figure 5, receives the dateout of embedded type CPU processing module.TMS320F2812 is connected with pci bus controller PCI9052 by Adress Bus (address bus), DataBus (data/address bus), Control Bus (control bus), pci bus controller PCI9052 is converted to the pci bus form with the data that TMS320F2812 transmitted, by pci bus and the mutual communication of CPU.

Claims (4)

1. Small Electric Current Earthing And Routing Device based on the FT3 host-host protocol, this single-phase earth fault line selection device is made up of high speed serial ports read module and two parts of main frame, described high speed serial ports read module is plugged on the PCI slot of host backplane, and described main frame is installed in the mainframe box; It is characterized by:
Described high speed serial ports read module comprises light-electric translation interface, embedded type CPU processing module, and pci bus driver module; Wherein the input of light-electric translation interface connects optical fiber, and the optical fiber input signal is converted to the signal of telecommunication, and the output of described light-electric translation interface links to each other with the input of described embedded type CPU processing module;
The output of described embedded type CPU processing module is connected on the pci bus by described pci bus driver module, and described pci bus links to each other with host CPU.
2. the Small Electric Current Earthing And Routing Device based on the FT3 host-host protocol according to claim 1 is characterized by: described main frame is an industrial control computer, comprises PCI base plate, mainboard, liquid crystal, electronic hard disc, internal memory; Wherein mainboard and high speed serial ports read module carry out data interaction by the standard pci bus of host backplane.
3. the Small Electric Current Earthing And Routing Device based on the FT3 host-host protocol according to claim 1 and 2, it is characterized by: described line selection apparatus is specifically applied to digital transformer substation, its front end is connected with electronic mutual inductor, and input signal is a digital signal, and line selection apparatus does not have the AD sampling element.
4. the Small Electric Current Earthing And Routing Device based on the FT3 host-host protocol according to claim 1 is characterized by: the mainboard of described main frame possesses Ethernet interface, and main frame is connected with automation of transformation substations backstage by Ethernet, reports the route selection result.
CN2009202464429U 2009-10-23 2009-10-23 Low-current grounding line selection device based on FT3 transport protocol CN201656455U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102944817A (en) * 2012-12-10 2013-02-27 辽宁省电力有限公司沈阳供电公司 Locating method and device for one-phase earth fault of power distribution network based on transient state signal wavelet transformation
CN107271849A (en) * 2017-07-01 2017-10-20 合肥东玖电气有限公司 A kind of Small Electric Current Earthing And Routing Device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102944817A (en) * 2012-12-10 2013-02-27 辽宁省电力有限公司沈阳供电公司 Locating method and device for one-phase earth fault of power distribution network based on transient state signal wavelet transformation
CN107271849A (en) * 2017-07-01 2017-10-20 合肥东玖电气有限公司 A kind of Small Electric Current Earthing And Routing Device

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C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20101124

Termination date: 20181023

CF01 Termination of patent right due to non-payment of annual fee