CN104280607A - Data synchronization framing device of digital substation independent metering system - Google Patents
Data synchronization framing device of digital substation independent metering system Download PDFInfo
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Abstract
The invention relates to a data synchronization framing device of a digital substation independent metering system. The data synchronization framing device of the digital substation independent metering system comprises a management control bus, a data bus, a switch input module, a processor module and a signal input model, wherein the signal input model receives alternate current voltage input signals and transmits data to the processor module through the data bus, the switch input module receives connector signals input at the switch position and transmits data to the processor module through the management control bus, and the processor module synchronizes the received signals again, packages the synchronized data and forwards the data to an ammeter through an Ethernet port. The data synchronization framing device of the digital substation independent metering system resolves the problem of concentrated data forwarding designed by an independent measurement system in the construction of a digital substation, can obviously improve the accuracy of electricity metering, increases the independence and reliability of electricity collection, and is convenient to manage by operators.
Description
Technical field
The present invention relates to the design of the data syn-chronization framing device of independent measure system in the construction of digitalized electric power grid.
Background technology
In recent years, along with the application of IEC 61850 standard and coming into operation of a large amount of digitizer, digital transformer substation was used widely in engineering practice.Digital transformer substation is the same with conventional substation, can there are electric energy metrical needs equally.Measure the basis as grid company business revenue, have consequence.
Each producer existing design, the digital transformer substation metering system design run is all the pattern using mutual inductor+merge cells output signal sampling+ammeter.Mutual inductor data output to merge cells, need merge cells to realize integration, and angle ratio corrects, and synchronously wait process, then are distributed to protection, metering, measuring equipment after resampling.Merge cells is as data hinge, and have the ability changing data, this does not just meet the requirement of metering system data uniqueness.The synchro system of combiner is subject to processing power, the impact of network pressure, Integral synchronous limited precision, and time delay situation is serious.
Summary of the invention
For above-mentioned prior art, the technical matters that the present invention solves is to provide a kind of data syn-chronization framing device solving the digital transformer substation independent measure system of metering system problem of data safety.
For solving the problem, the invention provides a kind of data syn-chronization framing device of digital transformer substation independent measure system, comprise management control bus, data bus, input module switch, processor module, signal input module, signal input module receives the current/voltage input signal at interval, and by transmitting data between data bus and processor module, input module switch receiving key Position input contact point signal, and by transmitting data between management control bus and processor module, the signal re-synchronization that processor module will receive, data after synchronous are packed, ammeter is forwarded to by Ethernet interface.
Proposition of the present invention, solves the data centralization forwarding problems of the independent measure system in digital transformer substation construction, for the construction of digital transformer substation is paved the way, plays great facilitation to its popularization.In the Intelligent transformer station of some after application, electric energy metrical accuracy can be significantly improved, enhance independence and the reliability of electric energy acquisition, facilitate operations staff to manage.Standardization digitizing Substation Design, the development and stabilization conscientiously promoting digital transformer substation use.
As the further improvement to technique scheme, the data packing after synchronous is become IEC-61850 standard format by processor module; Data bus is high speed data bus, and management control bus is low speed bus, improves volume of transmitted data; Signal input module adopts FPGA to realize process and the communication of input and output signal, input module switch adopts process and the communication of chip microcontroller input and output signal, processor module adopts FPGA to realize the exchanges data with data bus, improve the processing power of hardware, precise synchronization different pieces of information source data, do not need resampling, improve measuring accuracy.
Accompanying drawing explanation
Fig. 1 is the structural representation of the metering system in existing digitizing power station;
Fig. 2 is the structural representation of the digitizing power station independent measure system that the present invention proposes;
Fig. 3 is the structured flowchart of data syn-chronization framing device;
Fig. 4 is the structured flowchart of data syn-chronization framing device signal input module;
Fig. 5 is the structured flowchart of data syn-chronization framing device input module switch;
Fig. 6 is the structured flowchart of data syn-chronization framing device processor module.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
As shown in Figure 2, the current/voltage of electric system is converted to digital signal output by electronic current mutual inductor of the present invention and electronic type voltage transformer; Digital data transmission electronic current mutual inductor and electronic type voltage transformer measured is to data syn-chronization framing device; The digital signal received synchronously processes by data syn-chronization framing device, and related data is packed, and the data after packing is transferred to ammeter, is completed the metering of electric energy by ammeter.
Compared with the prior art shown in Fig. 1, the digital signal that electronic current mutual inductor of the present invention and electronic type voltage transformer are measured is not by existing merge cells, achieve Data-Link independent, keep closure and the digitizing of continuous data, and synchronously processed by data syn-chronization framing device data, improve the synchronization accuracy of data, thus improve the measuring accuracy of system.
In working of an invention mode, digital signal electronic current mutual inductor and electronic type voltage transformer can measured is by Optical Fiber Transmission to data syn-chronization framing device, and the data after packing are transmitted through the fiber to ammeter by data syn-chronization framing device.Owing to adopting optical fiber to carry out data transmission, reduce the error loss of transmission channel, thus further increase the measuring accuracy of system.
In the present invention; the electronic current mutual inductor that data syn-chronization framing device receives and the digital signal that electronic type voltage transformer is measured are not limited to a circuit-switched data source; data syn-chronization framing device receives a circuit-switched data source or is not less than the situation in a circuit-switched data source, all in protection scope of the present invention.
Data syn-chronization framing device structured flowchart of the present invention as shown in Figure 3.The data syn-chronization framing device of digital transformer substation independent measure system comprises management control bus 5, data bus 4, input module switch 1, processor module 2, signal input module 3, signal input module 3 receives the current/voltage input signal at interval, and by transmitting data between data bus 4 and processor module 2, input module switch 1 receiving key Position input contact point signal, and by transmitting data between management control bus 5 and processor module 2, the signal re-synchronization that processor module 2 will receive, data after synchronous are packed, data after packing can adopt IEC-61850 standard format, and be forwarded to ammeter by Ethernet interface.
Data bus 4 is for can adopt high speed data bus, and management control bus 5 is for adopting low speed bus.Signal input module 3 structured flowchart as shown in Figure 4, adopts FPGA to realize process and the communication of input and output signal, and have multiple signals input, the signal input module 3 shown in Fig. 4 has 9 road input signals.Input module switch 1 adopts process and the communication of chip microcontroller input and output signal, and as shown in Figure 5, single-chip microcomputer can adopt STM32F103 to input module switch 1 structured flowchart, has 4 road input signals.Processor module 2 structured flowchart as shown in Figure 6, adopts between FPGA and data bus 4 and transmits data.
The data syn-chronization framing device of independent measure system in the construction of digitalized electric power grid of the present invention, can be connected with ammeter, current transformer, voltage transformer (VT) by optical fiber and to communicate, reduce the error loss of transmission channel.
According to the above description, the embodiment of the data syn-chronization framing device of independent measure system in a kind of the construction of digitalized electric power grid, comprises signal input (NO2, NO5, NO8), the current/voltage input at an access interval, maximum 9 passages; Switch input (NO3, NO6, NO9), receiving key Position input contact, meets the input that substation operation mode changes; Processor (NO4, NO7, NO10), the signal of Received signal strength load module, re-synchronization, data are packed, and become IEC-61850 standard format, are forwarded to ammeter.
Claims (6)
1. the data syn-chronization framing device of a digital transformer substation independent measure system, it is characterized in that, comprise management control bus (5), data bus (4), input module switch (1), processor module (2), signal input module (3), signal input module (3) receives the current/voltage input signal at interval, and by transmitting data between data bus (4) and processor module (2), input module switch (1) receiving key Position input contact point signal, and by transmitting data between management control bus (5) and processor module (2), the signal re-synchronization that processor module (2) will receive, data after synchronous are packed, ammeter is forwarded to by Ethernet interface.
2. the data syn-chronization framing device of digital transformer substation independent measure system according to claim 1, is characterized in that, the data packing after synchronous is become IEC-61850 standard format by processor module (2).
3. the data syn-chronization framing device of digital transformer substation independent measure system according to claim 1 and 2, is characterized in that, data bus (4) is high speed data bus, and management control bus (5) is low speed bus.
4. the data syn-chronization framing device of digital transformer substation independent measure system according to claim 3, is characterized in that, signal input module (3) adopts FPGA to realize process and the communication of input and output signal.
5. the data syn-chronization framing device of digital transformer substation independent measure system according to claim 3, is characterized in that, input module switch (1) adopts process and the communication of chip microcontroller input and output signal.
6. the data syn-chronization framing device of digital transformer substation independent measure system according to claim 3, is characterized in that, described processor module (2) adopts FPGA to realize the exchanges data with data bus (4).
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| CN203166626U (en) * | 2012-12-27 | 2013-08-28 | 天津凯发电气股份有限公司 | Intelligent traction substation |
| CN203233236U (en) * | 2013-03-13 | 2013-10-09 | 江苏方天电力技术有限公司 | Digital protection, measurement and control integrated device |
| CN104597424A (en) * | 2015-01-07 | 2015-05-06 | 贵州电力试验研究院 | Verification platform and verification method for electric energy measurement of optical transformer |
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| US20060092985A1 (en) * | 2004-10-29 | 2006-05-04 | Samsung Electronics Co.; Ltd | Method of transmitting time-critical information in a synchronous ethernet system |
| CN101465564A (en) * | 2009-01-09 | 2009-06-24 | 北京美兰尼尔电子技术有限公司 | In-situ digitalization method and apparatus for transforming plant primary equipment |
| CN101984538A (en) * | 2010-05-25 | 2011-03-09 | 国电南瑞科技股份有限公司 | Data synchronization processing method for electronic mutual inductor using Manchester encoding |
| CN203166626U (en) * | 2012-12-27 | 2013-08-28 | 天津凯发电气股份有限公司 | Intelligent traction substation |
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Address after: 550002 Jiefang Road, Nanming, Guizhou, No. 32, Co-patentee after: NANJING XINNING OPTO-ELECTRONICS ENGINEERING CO., LTD. Patentee after: ELECTRIC POWER RESEARCH INSTITUTE OF GUIZHOU POWER GRID CO., LTD. Address before: 550002 Jiefang Road, Nanming, Guizhou, No. 32, Co-patentee before: NANJING XINNING OPTO-ELECTRONICS ENGINEERING CO., LTD. Patentee before: Guizhou Power Test Institute |
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Effective date of registration: 20220420 Address after: No.17 Binhe Road, Nanming District, Guiyang City, Guizhou Province Patentee after: Guizhou Power Grid Co.,Ltd. Address before: 550002 Jiefang Road, Nanming District, Guiyang, Guizhou Province, No. 32 Patentee before: ELECTRIC POWER RESEARCH INSTITUTE, GUIZHOU POWER GRID Co.,Ltd. Patentee before: Nanjing Xinning photoelectric Engineering Co., Ltd |
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