CN207397017U - A kind of electric quantity acquisition based on optical-fibre communications merges device - Google Patents

Abstract

The utility model is related to electric mutual inductor technical fields, and in particular to a kind of electric quantity acquisition based on optical-fibre communications merges device.The utility model is connected by several electronic current mutual inductor ECT and several electronic type voltage transformer EVT with combining unit 1, combining unit is connected with combining unit power supply 2 and clock input module 3 simultaneously, the combining unit is made of MPC8245 core boards, 2 road optical fiber change-over panels 12, data/address bus connection backboard, external communication debugging interface module, distal end collection plate 11, electronic current mutual inductor and electronic type voltage transformer are connected with distal end collection plate electric signal, and distal end collection plate is connected by optical fiber with 6 road optoelectronic transceiver converters of 2 road optical fiber change-over panels.The utility model collects or merges electronic type voltage transformer, the digital quantity signal or simulation small-signal of electronic current mutual inductor output, and is transmitted.

Description

A kind of electric quantity acquisition based on optical-fibre communications merges device

Technical field

The utility model is related to electric mutual inductor technical fields, and in particular to a kind of electric mutual inductor secondary device based on The electric quantity acquisition of optical-fibre communications merges device.

Background technology

With the high speed development of Chinese national economy, electric utility has also obtained development at full speed, particularly electric power trend Market, carries out today of " separating the factory and network, surf the Net at a competitive price ", and all trades and professions are also higher and higher to electricity needs.The sending out, is defeated of electric power, It is higher and higher to the automatization level requirement of links after dividing Jian with three link realizations.Coulomb collection system is " factory's net point Open, surf the Net at a competitive price " feasible solution is provided, it can be achieved that the data acquisition of critical point electricity, at times, and crossover rate, data Online, resource-sharing.Coulomb collection system can help enterprise to realize internal each electricity consumption point, the examination of transformer power consumption and point Analysis, is estimated cost, and auxiliary formulates decision-making and provides firsthand information.The modernization scientific management of power industry metering and billing is provided It important means and favourable ensures.Coulomb collection system grasps internal each transmission line of electricity, each electricity consumption point at any time for enterprise simultaneously Concrete condition, monitoring production, control power consumption, reduce cost with consumption, full and accurate, reliable data basis is provided.Electric power is set Standby monitoring is a basic function of all kinds of automation equipments, and AC sampling is then one of key technology.Electric power In any intelligence instrument used in system, can always use using this link, i.e., AC signal it is filtered, amplify after, Discrete series is obtained by time discretization, and this discrete series is stored in the process in computer.Data acquisition connects Mouth is in occupation of particularly important status in this instrument and meter, its performance determines the level of whole instrument, all Its cost also tends to highest in component.Obviously can be that can design of intelligent instrument into there are one suitable data acquisition interface The key of work(.

In micro computer just in Electric Parameters Sampling in application, generally being adopted using direct current sampling to parameters of electric power Sample samples the DC quantity after rectification.The method only need to sampled value carry out a transformation of scale, features simple structure, if Meter is simple.But this direct current method of sampling exist such as measurement parameter it is rectified after generate loss of significance；Rectification circuit is joined The problems such as number adjustment is difficult.Therefore, people are had also been proposed directly to the method for AC signal sampling, are directly calculated from definition Various parameters.It facts have proved：Data acquisition is carried out using alternating current sampling method, by the voltage that is obtained after algorithm computing, electric current, The parameters of electric power such as power, power factor have preferable accuracy and stability.The accuracy and speed of measurement, which determines, to be carried out Can electric quantity signal use AC sampling when gathering.In the starting stage of micro computer application, why using the direct current method of sampling It is sampled, is because its conversion chip speed is low, of high cost, in addition, dominant frequency is too low, command function is not also using direct current by force One reason of the method for sampling.Nowadays, micro computer, microcontroller processing speed greatly improve, with the raising of power technology, property The relatively good high-speed converters of valency also emerge in an endless stream, and realize in an AC power frequency periodic sampling hundreds of even thousands of a points It breaks through, strong technical guarantee is provided for AC sampling.

But it is to collect or merge the data of multiple mutual inductors that electric quantity acquisition, which merges device major function, at present, obtains electricity Force system electric current and instantaneous voltage, and filled with definite data transmission to electric system electric testing instrument and relay protection It puts；Each of which data channel can carry the sample values of the mutual inductor of one and/or more.Traditional electric quantity acquisition closes And device combining unit can only collect the digital quantity signal of electronic mutual inductor output, be unsatisfactory for DL/T860.91/92LE/92 marks Standard is not appropriate for using using the electric substation automation system of 860 standards of DL.

Utility model content

Reliable of ac information is provided for whole system the purpose of this utility model is to provide one kind, so as to be protection The reliability services such as device, measure and control device provide the electric quantity acquisition based on optical-fibre communications ensured and merge device.

What the purpose of this utility model was realized in：

A kind of electric quantity acquisition based on optical-fibre communications merges device, by several electronic current mutual inductor ECT and several electricity Minor voltage transformer EVT is connected with combining unit 1, and combining unit is connected with combining unit power supply 2 and inputs mould with clock simultaneously Block 3, the combining unit is by MPC8245 core boards, 2 road optical fiber change-over panels 12, data/address bus connection backboard, external communication tune Examination interface module, distal end collection plate 11 form, electronic current mutual inductor and electronic type voltage transformer and distal end collection plate electricity Signal connects, and distal end collection plate is connected by optical fiber with 6 road optoelectronic transceiver converters of 2 road optical fiber change-over panels, and optoelectronic transceiver turns Parallel operation connects backboard by the data/address bus of European 3 plug socket of 96 pins and is connected with MPC8245 core boards, on MPC8245 core boards The external communication debugging interface modules of support DL/T860.92 agreements include 6 road light network interface of standard configuration and maximum support 8 road light nets Mouthful, external communication debugging interface module provides data by Ethernet to bay device.

The electronic current mutual inductor and electronic type voltage transformer is connected with distal end collection plate electric signal at least to be wrapped Include the digital quantity signal of three road electronic current mutual inductor outputs in electric system, the number of three road electronic current mutual inductor protections Word amount signal, the digital quantity signal of three road electronic type voltage transformers, neutral point electronic current mutual inductor digital quantity signal, The digital quantity signal of neutral point electronic type voltage transformer and the digital quantity signal of busbar electronic type voltage transformer.

The MPC8245 core boards include MPC8245 processing modules 4, and Synchronous Sampling Pulse module 5 is synchronous to receive mould Block 6, network module 7, external communication debugging interface module 8, fault recovery and parameter memory module 9, MPC8245 processing modules Synchronous Sampling Pulse module, synchronous receiving module, network module, external communication debugging interface module, fault recovery are connected respectively And parameter memory module, the Synchronous Sampling Pulse module and synchronous receiving module by 32 bit data bus with MPC8245 processing modules connect, and the Synchronous Sampling Pulse module being connected with MPC8245 processing modules connects equipped with external sync benchmark Receiving end mouth and Synchronous Sampling Pulse output port receive external sync benchmark by external sync benchmark receiving port； The synchronous receiving module of MPC8245 processing modules connection is equipped with electricity data input port；Several outsides of network module connection Communication debugging interface module is connected with MPC8245 processing modules.

The Synchronous Sampling Pulse module, using FPGA module, the input quantity of FPGA module is synchronous receiving module The timing code for the 1PPS and IRIG-B forms that GPS is provided exports to be followed IEC60044-7/8 standards after 1PPS synchronizations Sampling pulse and decoded timescale data.

The MPC8245 possesses the 16550DUART of 2 standards in itself, and extension as parameter/configuration interface, connects all the way Mouth uses USB A type mouths using RS232 signal definitions external interface, and in addition the Debugging message all the way as standard prints serial ports.

Synchronous Sampling Pulse module is equipped with internal crystal oscillator clock, and external communication debugging interface module is included through PCL buses The receiving type Ethernet interface of extension and the single-shot formula Ethernet interface extended by fpga chip, for being connected by interchanger SMV/GOOSE。

The electronic current mutual inductor and electronic type voltage transformer be arranged at substation section, big customer part and Resident's low-pressure section, the substation section include multifunctional meter and critical point terminal, and the department of major clients point includes multifunctional meter With special transformer terminals, resident's low-pressure section includes multiple low pressure resident ammeters, concentrator and region summary table.

Synchronous Sampling Pulse module, including multiple signal conditioning circuits, multiple analog to digital conversion circuits and synchronous identification device, The plurality of signal conditioning circuit nurses one's health several electronic current mutual inductors and the pulse letter of several electronic type voltage transformers output Number, the synchronization identification device identification signal channel pulse peak value and half peak breadth simultaneously identify the secondary letter of situation control according to signal path Number channel pulse is identified in corresponding sample range, which includes data buffering module, main identification module With secondary identification module, which receives the digital signal of analog to digital conversion circuit output and to received digital signal Synchronous into row clock, main identification module receives and processes main identification signal corresponding with main signal channel and output control signal To secondary identification module, which receives and is handled and multiple sub signal passages according to the control signal of the main identification module Corresponding pair identification signal data.

The external communication debugging interface module includes HFBR-14xx type fiber optic emitters, HFBR-14 fiber optic emitters 2,6, No. 7 pins connect the first variable resistor and the output terminal with gate power driving circuit 75451 respectively, No. 3 pins ground connection, The output terminal of HFBR-14 fiber optic emitters is connected with external optical fiber, and 1k is connected with the input terminal of gate power driving circuit 75451 Ω resistance, 1k Ω resistance are connected 5V power supplys with the first variable resistor.

The beneficial effects of the utility model are：The utility model collects (or merging) electronic type voltage transformer, electronics The digital quantity signal of formula current transformer output can also collect and sample conventional voltage transformer, the mould of current transformer output Intend signal or the simulation small-signal of electronic mutual inductor output, and be transmitted.

Description of the drawings

Fig. 1 is that the electric quantity acquisition based on optical-fibre communications merges schematic device.

Fig. 2 is combining unit structure diagram.

Fig. 3 is external communication debugging interface module diagram.

Specific embodiment

1-3 is described further the utility model below in conjunction with the accompanying drawings.

The utility model is related to electric mutual inductor technical fields, and in particular to the electric quantity acquisition of electric mutual inductor secondary device Merge device.Bridge of the combining unit as connection electric mutual inductor and wall secondary device, only meets the requirements, Cai Nengwei Whole system provides reliable of ac information, so as to provide guarantee for reliability services such as protective device, measure and control devices.Reasonably Interface design can not only simplify secondary device, and can improve accuracy and the reliability of whole system.The standardization of interface The optimization of electric substation automation system will also be promoted, and finally realize the information sharing and the system integration in substation.The present apparatus To be suitable for the data combination unit of the electronic mutual inductor of substation.The present apparatus merges and sends 1 circuit by Ethernet ABC three-phases measure and protective current, the data of voltage.It sends agreement and follows IEC61850-9-1/2LE/2 standards.The present apparatus is set It counts agile and all-purpose, can support 110KV, the needs of the various electronic mutual inductors configurations of 220KV and ratings above substation.

A kind of electric quantity acquisition based on optical-fibre communications merges device, by several electronic current mutual inductor ECT and several electricity Minor voltage transformer EVT is connected with combining unit, and combining unit is connected with combining unit power supply and clock input module simultaneously, The combining unit is by MPC8245 core boards, 2 road optical fiber change-over panels, data/address bus connection backboard, external communication debugging interface Module, distal end collection plate composition, electronic current mutual inductor and electronic type voltage transformer are connected with distal end collection plate electric signal, Distal end collection plate is connected by optical fiber with 6 road optoelectronic transceiver converters of 2 road optical fiber change-over panels, and optoelectronic transceiver converter passes through 96 The data/address bus connection backboard of European 3 plug socket of pin is connected with MPC8245 core boards, the support DL/ on MPC8245 core boards The external communication debugging interface module of T860.92 agreements includes 8 road light network interfaces of 6 road light network interface of standard configuration and maximum support, and outside is logical It interrogates debugging interface module and provides data to bay device by Ethernet.

The electronic current mutual inductor and electronic type voltage transformer is connected with distal end collection plate electric signal at least to be wrapped Include the digital quantity signal of three road electronic current mutual inductor outputs in electric system, the number of three road electronic current mutual inductor protections Word amount signal, the digital quantity signal of three road electronic type voltage transformers, neutral point electronic current mutual inductor digital quantity signal, The digital quantity signal of neutral point electronic type voltage transformer and the digital quantity signal of busbar electronic type voltage transformer.

The MPC8245 core boards include MPC8245 processing modules, Synchronous Sampling Pulse module, synchronous receiving module, Network module, external communication debugging interface module, fault recovery and parameter memory module, MPC8245 processing modules connect respectively Connect Synchronous Sampling Pulse module, synchronous receiving module, network module, external communication debugging interface module, fault recovery and ginseng Number memory module, the Synchronous Sampling Pulse module and synchronous receiving module pass through 32 bit data bus and MPC8245 processing Module connects, Synchronous Sampling Pulse module be connected with MPC8245 processing modules equipped with external sync benchmark receiving port and Synchronous Sampling Pulse output port receives external sync benchmark by external sync benchmark receiving port；MPC8245 processing modules The synchronous receiving module of connection is equipped with electricity data input port；Several external communication debugging interface modules of network module connection It is connected with MPC8245 processing modules.

The Synchronous Sampling Pulse module, using FPGA module, the input quantity of FPGA module is synchronous receiving module The timing code for the 1PPS and IRIG-B forms that GPS is provided exports to be followed IEC60044-7/8 standards after 1PPS synchronizations Sampling pulse and decoded timescale data.

The MPC8245 possesses the 16550DUART of 2 standards in itself, and extension as parameter/configuration interface, connects all the way Mouth uses USB A type mouths using RS232 signal definitions external interface, and in addition the Debugging message all the way as standard prints serial ports.

Synchronous Sampling Pulse module is equipped with internal crystal oscillator clock, and external communication debugging interface module is included through PCL buses The receiving type Ethernet interface of extension and the single-shot formula Ethernet interface extended by fpga chip, for being connected by interchanger Meet SMV/GOOSE.

The electronic current mutual inductor and electronic type voltage transformer be arranged at substation section, big customer part and Resident's low-pressure section, the substation section include multifunctional meter and critical point terminal, and the department of major clients point includes multifunctional meter With special transformer terminals, resident's low-pressure section includes multiple low pressure resident ammeters, concentrator and region summary table.

Synchronous Sampling Pulse module, including multiple signal conditioning circuits, multiple analog to digital conversion circuits and synchronous identification device, The plurality of signal conditioning circuit nurses one's health several electronic current mutual inductors and the pulse letter of several electronic type voltage transformers output Number, the synchronization identification device identification signal channel pulse peak value and half peak breadth simultaneously identify the secondary letter of situation control according to signal path Number channel pulse is identified in corresponding sample range, which includes data buffering module, main identification module With secondary identification module, which receives the digital signal of analog to digital conversion circuit output and to received digital signal Synchronous into row clock, main identification module receives and processes main identification signal corresponding with main signal channel and output control signal To secondary identification module, which receives and is handled and multiple sub signal passages according to the control signal of the main identification module Corresponding pair identification signal data.

Entire hardware is divided into block plate

The external communication debugging interface module includes HFBR-14xx type fiber optic emitters, HFBR-14 fiber optic emitters 2,6, No. 7 pins connect the first variable resistor and the output terminal with gate power driving circuit 75451 respectively, No. 3 pins ground connection, The output terminal of HFBR-14 fiber optic emitters is connected with external optical fiber, and 1k is connected with the input terminal of gate power driving circuit 75451 Ω resistance, 1k Ω resistance are connected 5V power supplys with the first variable resistor.

Specific equipment is described in detail below.

MPC8245 core boards include MPC8245 processing modules, Synchronous Sampling Pulse module, synchronous receiving module, network mould Block, external communication debugging interface module, fault recovery and parameter memory module.

2 road optical fiber change-over panels, every piece of plank include 6 road optoelectronic transceiver converters.

For data/address bus connection backboard for connecting above-mentioned each daughter board, socket is European 3 plug socket of 96 pins.

External communication debugging interface module defends 6 road light network interface (single-shot) of standard configuration, and maximum supports 8 road light network interfaces (single-shot), branch Hold DL/T860.92 (IEC61850-9-2) agreement.

Distal end collection plate is solar powered using 12V, and fibre-optic data communication, physical interface and technology are used with combining unit Index refers to 3A modules distal end collection plate technical detail.

Inner function module includes：

MPC8245 Core Control Platform Baseds

Combining unit is mainly sent out as protection, the data source of measuring and controlling equipment, its data way of output by Ethernet The data packet for following IEC61850-9 frame formats is sent, therefore network performance is one of most important performance indicator of combining unit. MPC8245 is very outstanding a of the ratio of performance to price in a series of high performance communication processors that Freescale is released.It Every technical characterstic and technical indicator be all very suitable for applying in the automatic intelligent device of digital transformer substation.It is led Want feature as follows：

MPC8245 is the enhanced integrated primary processor of the speed of dominant frequency 350MHz, and processor design is based on PowerPC framves Structure, it is per second to handle 665,000,000 instructions.

Full Featured embedded PowerPC 603e kernels are integrated by high-performance 32-bit processor and floating-point, memory pipe Reason, inch prediction unit, 16K data and 16K instruction buffers integrate.Being integrated with a bridging chip MPC107 includes height Performance storage control, interrupt control unit, dma controller, I2C interface and 16550 compatibility DUART.The PCI Bridge control of MPC8245 Device processed supports PCI2.2 bus standards, and data width is 32, and bus frequency reaches as high as 66MHz, this imparting system is good Peripheral expansion ability and drive software compatibility.

It is synchronous to receive detection mouth module

Using MPC8245 Data-Bus extension functions, FPGA module can be articulated in 32 bit data bus, in utilization Disconnected mode reads access evidence, processing capacity can arrive the speed of 133MB/S.

More mouthfuls of high speed fibre network interfaces

Need this data source of combining unit that can be carried simultaneously to multiple bay devices in digital transformer substation engineering practice For data, therefore it is required that combining unit has multichannel Ethernet output interface.The Ethernet that MPC8245 has pci bus to extend connects Mouth can at most have 2, and SMV/GOOSE is connected for passing through interchanger.If necessary to more multiplex roles, fpga chip reality may be employed Now extend.Combining unit employs the hardware Ethernet IP kernel of ALTERA companies, can expand 8 100BASE-FX single-shots with Too network interface.Each port is divided into individual VLAN, therefore does not have and influence each other between each port.

FPGA clock modules

Field programmable gate array (FPGA) realizes the software implementation of hardware, and data processing delay is small, stable and reliable in work, Upgrading is convenient, is the reasonable selection for realizing synchronization module in combining unit.

The input quantity of FPGA is the timing code of the GPS 1PPS and IRIG-B forms provided, is exported as by after 1PPS synchronizations Follow the sampling pulse of IEC60044-7/8 (GB/T 20840.7/8) standard and decoded timescale data.Synchronous Sampling Pulse Electronic mutual inductor and the analogue collection module synchronous acquisition current and voltage quantities of combining unit are triggered, decoded markers passes through Serial communication port is read by CPU.Meanwhile FPGA need to judge the validity of 1PPS signals, and 1PPS is rejected in optical fiber swapping process Or the spurious signal generated under other disturbed conditions, prevent the malfunction of successor devices.FPGA is to 1PPS signal validity Judging result notifies CPU, CPU that will put upper corresponding mark in IEC61850-9 (DL/T 860.9) message.

FPGA uses High Precision Crystal Oscillator, one 1PPS clock of self maintained.When the 1PPS that GPS is provided is effective, synchronously certainly The 1PPS of body；After external 1PPS fails, because FPGA has standby 1PPS, it can also maintain such as overcurrent protection, observing and controlling The validity of data.

Parameter configuration communication port RS-232 and local debugging RS232 interface

MPC8245 possesses the 16550DUART of 2 standards in itself, and expansible all the way as parameter/configuration interface, interface makes USB A type mouths are used with RS232 signal definitions external interface, in addition the Debugging message all the way as standard prints serial ports.

Fault management

Possesses hardware watchdog on MPC8245 product platforms, collocation software control possesses good failover capability.

It is locally stored

Possesses the EEPROM that IIC interfaces can mount 256Kbit on MPC8245 product platforms, can store needs to preserve Configuration parameter.

High performance MPC8245 core control panels

MPC8245 peripheral components

128Mbyte PC133-SDRAM

2 AM29LV1602Mbyte FLASH are used to preserve operating system

1 tunnel standard, 16550 serial ports, 1 road RS485 interfaces

Standard IIC interfaces mount 1 road EEPROM, 2 road high-precision adcs

2 road DM910210/100M network interface cards

3 road pci interface Multi-serial port chips

The 16 way switch amount input ports expanded

External hardware house dog

FPGA clocks

What combining unit FPGA was selected is the EP1C6 family chips of altera corp, it is with control function again with fortune I/O is resourceful on calculation functional sheet, and arithmetic speed is fast, can online programming.FPGA not only will to GPS provide pps pulse per second signal into Row processing is also responsible for the generation of A/D sampling control signals, and in addition in view of some destabilizing factors, FPGA will also provide for system One is seen backup clock, and synchronizing signal can be provided for system after GPS second pulse failure.

Entire synchronized sampling flow is divided into 3 modules：

Judge the PPS mass of GPS

Double frequency pulse generates sampling control signal during PPS pulse quality qualifications

No PPS pulses or it is off quality when generated by local High Precision Crystal Oscillator frequency dividing and see backup clock and do controlling of sampling Signal

System software can select Linux, and kernel version is that 2.4.25 development platforms are that ELDK3.1Linux has opening Source code, kernel are small, powerful, source code is easy to cut and functionality of vlan is had been realized in framework, thus are made using Linux It will be reduced for operating system development difficulty very much.System software can also select vxworks, and kernel version is opened for vxworks6.6 Hair platform is workbench3.0for PPC.Running software is exactly the scheduling cooperating operation between each task, is had between task There are interdependence and time sequence.By the task communication administrative mechanism of call operation system, it can conveniently and efficiently realize and appoint Communication between business.Application software, which includes synchronous sampling signal and sends task and obtain to handle with semaphore notice sampled data, appoints Business, combining unit need each road acquisition Information encapsulation being sent to network for Ethernet-Tree frame.The purpose multicast address of transmission It is chosen for

01-0C-CD-04-xx-xx, secondary device unit must be added to corresponding multicast address or VLAN and can just receive Ordered network message.The optional function of combining unit is also extended in IEC-6850-9-2, you can receive by servicing Reading and setting of the subscriber to MSVCB information, these belong to the network service of client/server class, it is necessary to combining unit energy The request message of two sub-cells transmission is received and recognized, and network-feedback can be passed through in expression layer by MSVCB Information encapsulation framing To two sub-cells..The output of combining unit will be transmitted by Ethernet, it is necessary to and ethernet driver communicates.Ether Net driver belongs to operation kernel program, therefore can only can just use ethernet network interface card hardware transport by system calling Sampled value.Linux and vxworks kernels all provide the interface of a standard for all equipment, this interface passes through one Data structure realizes that this data structure is the method for access interior data each device provides standard, including Initialization, method of sending and receiving.The realization of these methods is completed in each specific device driver, and number of ports The function pointer that these methods are only provided according to structure supplies upper-level protocol or application call.

Here we are it is important to note that the utility model only protects the master data described in the content of the invention to handle knot Structure, and software is in itself within the scope of the restriction of the utility model, any software that can realize this patent structure function All writable the system.And the software helps the part of hardware realization function to fall within techniques known, therefore herein Place is not described further.The above is specific embodiment of the present utility model, it is noted that for the art For those of ordinary skill, on the premise of the utility model principle is not departed from, several improvements and modifications can also be made, these Improvements and modifications are also considered as the scope of protection of the utility model.

Claims (8)

1. a kind of electric quantity acquisition based on optical-fibre communications merges device, by several electronic current mutual inductor ECT and several electronics Formula voltage transformer EVT is connected with combining unit, and combining unit is connected with combining unit power supply and clock input module simultaneously, It is characterized in that：The combining unit is logical by MPC8245 core boards, 2 road optical fiber change-over panels, data/address bus connection backboard, outside Interrogate debugging interface module, distal end collection plate composition, electronic current mutual inductor and electronic type voltage transformer and distal end collection plate Electric signal connects, and distal end collection plate is connected by optical fiber with 6 road optoelectronic transceiver converters of 2 road optical fiber change-over panels, optoelectronic transceiver Converter connects backboard by the data/address bus of European 3 plug socket of 96 pins and is connected with MPC8245 core boards, MPC8245 core boards On the external communication debugging interface modules of support DL/T860.92 agreements include 6 road light network interface of standard configuration and maximum support 8 road light Network interface, external communication debugging interface module provide data by Ethernet to bay device.

2. a kind of electric quantity acquisition based on optical-fibre communications according to claim 1 merges device, it is characterised in that：Described Electronic current mutual inductor and electronic type voltage transformer are connected with distal end collection plate electric signal including at least in electric system three The digital quantity signal of road electronic current mutual inductor output, the digital quantity signal of three road electronic current mutual inductor protections, three tunnels The digital quantity signal of electronic type voltage transformer, the digital quantity signal of neutral point electronic current mutual inductor, neutral electron-dot formula The digital quantity signal of voltage transformer and the digital quantity signal of busbar electronic type voltage transformer.

3. a kind of electric quantity acquisition based on optical-fibre communications according to claim 1 merges device, it is characterised in that：Described MPC8245 core boards include MPC8245 processing modules, Synchronous Sampling Pulse module, synchronous receiving module, network module, outside Debugging interface module is communicated, fault recovery and parameter memory module, MPC8245 processing modules connect Synchronous Sampling Pulse respectively Module, synchronous receiving module, network module, external communication debugging interface module, fault recovery and parameter memory module, it is described Synchronous Sampling Pulse module and synchronous receiving module be connected by 32 bit data bus with MPC8245 processing modules, with The Synchronous Sampling Pulse module of MPC8245 processing modules connection is equipped with external sync benchmark receiving port and Synchronous Sampling Pulse Output port receives external sync benchmark by external sync benchmark receiving port；The connection of MPC8245 processing modules synchronously connects It receives module and is equipped with electricity data input port；At several external communication debugging interface modules and MPC8245 of network module connection Manage module connection.

4. a kind of electric quantity acquisition based on optical-fibre communications according to claim 3 merges device, it is characterised in that：Described Synchronous Sampling Pulse module, synchronous receiving module using FPGA module, the input quantity of FPGA module for the GPS 1PPS provided and The timing code of IRIG-B forms is exported as by after the sampling pulse for following IEC60044-7/8 standards after 1PPS synchronizations and decoding Timescale data.

5. a kind of electric quantity acquisition based on optical-fibre communications according to claim 3 merges device, it is characterised in that：Synchronously adopt Sample pulse module is equipped with internal crystal oscillator clock, external communication debugging interface module include by the receiving types of PCL bus extensions with Too network interface and the single-shot formula Ethernet interface extended by fpga chip, SMV/GOOSE is connected for passing through interchanger.

6. a kind of electric quantity acquisition based on optical-fibre communications according to claim 1 merges device, it is characterised in that：Described Electronic current mutual inductor and electronic type voltage transformer are arranged at substation section, big customer part and resident's low-pressure section, The substation section includes multifunctional meter and critical point terminal, and the department of major clients point includes multifunctional meter and special transformer terminals, institute Stating resident's low-pressure section includes multiple low pressure resident ammeters, concentrator and region summary table.

7. a kind of electric quantity acquisition based on optical-fibre communications according to claim 3 merges device, it is characterised in that：Synchronously adopt Sample pulse module, including multiple signal conditioning circuits, multiple analog to digital conversion circuits and synchronous identification device, the plurality of signal condition Circuit nurses one's health several electronic current mutual inductors and the pulse signal of several electronic type voltage transformers output, and synchronously identification fills for this It puts identification signal channel pulse peak value and half peak breadth and identifies that situation controls sub signal channel pulse right according to signal path It answers in sample range and is identified, which includes data buffering module, main identification module and secondary identification module, should Data buffering module receives the digital signal of analog to digital conversion circuit output and, master synchronous into row clock to received digital signal Identification module receives and processes main identification signal corresponding with main signal channel and outputs a control signal to secondary identification module, should Secondary identification module receives and handles secondary identification letter corresponding with multiple sub signal passages according to the control signal of the main identification module Number.

8. a kind of electric quantity acquisition based on optical-fibre communications according to claim 3 merges device, it is characterised in that：Described External communication debugging interface module includes HFBR-14xx type fiber optic emitters, 2,6, No. 7 pins of HFBR-14 fiber optic emitters The first variable resistor and the output terminal with gate power driving circuit 75451, No. 3 pin ground connection, HFBR-14 fibre optical transmissions are connect respectively The output terminal of device is connected with external optical fiber, and 1k Ω resistance, 1k Ω resistance are connected with the input terminal of gate power driving circuit 75451 5V power supplys are connected with the first variable resistor.