CN205539268U

CN205539268U - Smart power grids light digital relay protection tester

Info

Publication number: CN205539268U
Application number: CN201620242046.9U
Authority: CN
Inventors: 王周蓉
Original assignee: Chengdu Tesient Instrument Co ltd
Current assignee: Chengdu Tesient Instrument Co ltd
Priority date: 2016-03-28
Filing date: 2016-03-28
Publication date: 2016-08-31
Anticipated expiration: 2026-03-28

Abstract

The utility model discloses a smart power grids light digital relay protection tester, including external shell and internal circuit board, the internal circuit board include mainboard, ST board, on -off input circuit board, switching value and little signal output circuit board and power strip, wherein, the mainboard passes through the net twine to be connected with communication board, the mainboard still is connected with ST board, on -off input circuit board and switching value and little signal output circuit board respectively through the winding displacement, the mainboard hug closely the external shell inner wall, external shell's outer wall be provided with the radiation tooth. The utility model discloses neither can increase the volume of tester, also can not roll up the manufacturing cost of tester. Only need can to going on in external shell's the production modifing a little.

Description

A kind of intelligent grid light digital relay protection tester

Technical field

This utility model relates to a kind of intelligent grid light digital relay protection tester.

Background technology

Owing to the information feedback amount of tradition transformer station is little, fault message is difficult to Macro or mass analysis, wiring complexity is loaded down with trivial details, and have the problems such as security risk for on-the-spot test operations staff, and in these years the developing rapidly of information, communication and network technology, people have begun to these shortcomings attempting utilizing optical communication to overcome tradition transformer station, in addition country's support energetically to digital transformer substation, transformer station is included, and the light digitization of power system necessarily becomes trend, for this change, necessarily lead to corresponding product and match.

Further; development along with power system light digitization; along with country's carrying forward vigorously the digital network of Electric control; along with the rise that light digital transformer substation is many; light digital relay protection technology is advanced triumphantly; requirement to relevant light digital relay protection product is more and more higher, and therefore, light digital relay protection tester is also updating at a terrific speed.

And the existing usual data processing amount of light digital relay protection tester for intelligent grid is higher, but the most concrete heat sinking function, even if or to have heat sinking function be also to install the modes such as fan to make volume bigger.

Utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art, it is provided that a kind of intelligent grid light digital relay protection tester with heat sinking function.

The purpose of this utility model is achieved through the following technical solutions: a kind of intelligent grid light digital relay protection tester, including external shell and internal circuit board, described internal circuit board includes mainboard, ST plate, switching value input circuit plate, switching value and small-signal output circuit plate and power panel, wherein, mainboard is connected with communication board by netting twine, mainboard also by winding displacement respectively with ST plate, switching value input circuit plate and switching value are connected with small-signal output circuit plate, described mainboard is close to external shell inwall, the outer wall of described external shell is provided with radiation tooth.

Described internal circuit board also includes a power panel, and described power panel is connected with mainboard, and external voltage is carried out transfer and exports to mainboard by described power panel.

Described mainboard is welded with DSP, FPGA and SFF mouth.

Described ST plate is welded with ST mouth and B code mouth.

Described communication board includes network interface, GPS module and program debugging interface.

The beneficial effects of the utility model are: this utility model uses two ways to dispel the heat, and both will not increase the volume of tester, also will not roll up the production cost of tester.Have only in the production to external shell revise a little.

Accompanying drawing explanation

Fig. 1 is this utility model internal circuit board connection diagram；

Fig. 2 is this utility model external shell radiation tooth structural representation；

In figure, 1-radiation tooth.

Detailed description of the invention

The technical solution of the utility model is described in further detail below in conjunction with the accompanying drawings:

As shown in Figure 1 and Figure 2, in the present embodiment, tester one has 6 pieces of circuit boards:

1, power panel, power panel external 220V alternating current, the unidirectional current of output 5V and positive and negative 12V is other module for power supply.

2, ST mouth, the ST plate of B code mouth it are welded with；Wherein B code mouth connects IRIG-B lock unit (model is the module of IEEE1588), at IRIG-B lock unit when as B code source, by PLD (in the present embodiment, it is connected with the DSP on mainboard) program the coding of IRIG-B code, externally provide the data of IRIG-B code form to send at IRIG-B lock unit；When there is B code source outside, the IRIG-B coding outside reception, it is decoded by PLD, extracting time information, and local clock is adjusted；And ST mouth is the one of which of optical fiber interface, usually plug-in is round.The joints of optical fibre are to carry out the device that detachable (movable) is connected between optical fiber with optical fiber, it is the two of optical fiber end face precision docking, so that the light energy of launching fiber output can be coupled to receive in optical fiber to greatest extent, and making impact system caused due to its intervention optical link be minimized, this is the basic demand of the joints of optical fibre.To a certain extent, the joints of optical fibre also have impact on reliability and the properties of optical transmission system.The joints of optical fibre can be divided into the single mode of common silica-based optical fibers, multimode connector by the difference of transmission medium, also has other such as the joints of optical fibre with plastic cement etc. as transmission medium；Can be divided into by union joint version: FC, SC, ST, LC, D4, DIN, MU, MT etc. various forms.Specifically, using ST mouth in the present embodiment, ST adapter is generally used for wiring unit end, such as fibre distribution frame or optic module；In the present embodiment, ST plate includes an optical module, specifically it is made up of the AFBR5803 photoelectric conversion module of 125M and the AFBR1414 photoelectric conversion module of 50M, described AFBR5803 produces the Ethernet optical information of optical module output for the Ethernet signal of telecommunication, and described AFBR1414 is for the serial ports optical information of the signal of telecommunication generation optical module output of harvester.

3, switching value input circuit plate, according to the definition of Baidupedia, On-off signal output module is a equipment that can on-off model Gather and input/control be exported, also commonly referred to as digital quantity I/O module.By RS-485 bus, on-off model collection to computer (being FPGA in the present embodiment) or computer are sent dependent instruction and controlled the correlation behavior of switch by module, pairwise communications can also be carried out, the correlation behavior of remote control switch by RS-485 bus.Communication protocol is the related protocol of standard Modbus agreement or customization.I.e. switching value input circuit plate is prior art.

4, switching value and small-signal output circuit plate, it is achieved small voltage electric current exports, and 8 split outputs, it is achieved the complete closed loop test of protection；LTC2704 D/A transducer and small signals amplification circuit module by 16,4 passage form, the LTC2704 D/A converter of described 4 passages 16 is driven by FPGA, and the LTC2704 D/A converter of 16, described 4 passage produces the signal source of standard again by the AC signal of small signals amplification circuit module generation 0-7V.

5, network interface, GPS, the communication board of program debugging interface are included, for this tester and outside communication.Wherein, network interface is for being attached with outside industrial computer by netting twine.GPS module receives gps signal by antenna, transfers serial data to, is decoded, extracting time information, adjusts local clock in internal PLD (in an embodiment for FPGA).Can be synchronized by GPS or B code interface two ways the most in the present embodiment.And program debugging interface is used for connecting outside debugging machine, the program of tester is debugged.

6, the mainboard of the acp chip modules such as DSP, FPGA, SFF mouth it is welded with；Mainboard has been simultaneously connected with ST plate, power panel, outputs into small-signal plate communication board, and mainboard needs to process all of signal, is connected with communication board and industrial computer by netting twine, by winding displacement and ST plate, outputs and is connected into small-signal plate.Ultimately form one and can externally export response, internally receive man-machine communication's automatic control system that union processes.Specifically, FPGA module carries out both-way communication with the optical module in communication board, ST plate and DSP simultaneously, is responsible for the process of agreement, the conversion of form, the packing etc. of information；Optical module externally exports optical signal receiving after the correct level signal of FPGA, on the contrary, also the optical signal received by outside can be converted into level signal and give FPGA；DSP module only and carries out both-way communication between FPGA, accept the requirement from FPGA, and give FPGA instruction issuing, DSP unilaterally accepts from outside On-off signal signal (from switching value input circuit plate) simultaneously, one-sided externally output switch amount output signal and digital signal level, digital signal level therein consigns to D/A converter (i.e. the LTC2704 of 16,4 passage of switching value and small-signal output circuit plate)；D/A converter is receiving after the digital quantity of DSP, is responsible for the name externally output (i.e. switching value and the small signals amplification circuit module of small-signal output circuit plate) being converted into analog quantity with small-signal.

Outside industrial computer is connected with the network interface of mainboard by short netting twine, and by ICP/IP protocol and mainboard communication, power supply is 5V and 12V, power panel provide.

The internal arithmetic of each circuit board is not this utility model problem of interest, the problem that this utility model solves heat radiation by annexation and structure.

In the present embodiment, use two kinds of radiating modes that this tester is dispelled the heat:

1, described mainboard is close to external shell inwall, focuses primarily upon in the mainboard being welded with DSP, FPGA owing to data process, and therefore by it only by the inwall with external shell, dispels the heat.

2, the outer wall of described external shell is provided with radiation tooth 1, and the circuit produced internal circuit board by radiation tooth 1 is dispelled the heat further.

Use both modes to dispel the heat, both will not increase the volume of tester, also will not roll up the production cost of tester.Have only in the production to external shell revise a little.

Claims

1. an intelligent grid light digital relay protection tester; it is characterized in that: include external shell and internal circuit board; described internal circuit board includes mainboard, ST plate, switching value input circuit plate, switching value and small-signal output circuit plate and power panel; wherein; mainboard is connected with communication board by netting twine; mainboard is connected with small-signal output circuit plate with ST plate, switching value input circuit plate and switching value respectively also by winding displacement; described mainboard is close to external shell inwall, and the outer wall of described external shell is provided with radiation tooth (1).

A kind of intelligent grid light digital relay protection tester the most according to claim 1; it is characterized in that: described internal circuit board also includes a power panel; described power panel is connected with mainboard, and external voltage is carried out transfer and exports to mainboard by described power panel.

A kind of intelligent grid light digital relay protection tester the most according to claim 1, it is characterised in that: described mainboard is welded with DSP, FPGA and SFF mouth.

A kind of intelligent grid light digital relay protection tester the most according to claim 1, it is characterised in that: described ST plate is welded with ST mouth and B code mouth.

A kind of intelligent grid light digital relay protection tester the most according to claim 1, it is characterised in that: described communication board includes network interface, GPS module and program debugging interface.