CN206557369U - High-voltage electric-energy meter on-line monitoring system based on carrier communication - Google Patents

High-voltage electric-energy meter on-line monitoring system based on carrier communication Download PDF

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Publication number
CN206557369U
CN206557369U CN201621266340.XU CN201621266340U CN206557369U CN 206557369 U CN206557369 U CN 206557369U CN 201621266340 U CN201621266340 U CN 201621266340U CN 206557369 U CN206557369 U CN 206557369U
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China
Prior art keywords
measurement
energy meter
speed serial
monitoring system
high speed
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CN201621266340.XU
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Chinese (zh)
Inventor
李学武
李道豫
邱志远
冯文昕
吴才庆
刘浩
周培
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Guiyang Bureau Extra High Voltage Power Transmission Co
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Guiyang Bureau Extra High Voltage Power Transmission Co
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Abstract

The utility model discloses a kind of high-voltage electric-energy meter on-line monitoring system based on carrier communication, a variety of functions such as the error real-time online measuring and PT caused by electric energy meter error real-time online measuring, PT secondary voltage drops and the real load on-line measurements of CT are integrated in one, expand the application scenario of metering device monitoring system, due to using the original second test loop cable transmission sampled data of transformer station, a large amount of secondary cables and secondary connection need not be laid, it is ensured that the normal operation of metering device and secondary circuit.

Description

High-voltage electric-energy meter on-line monitoring system based on carrier communication
Technical field
The utility model is related to technical field of power systems, and in particular to a kind of high-voltage electric energy measurement based on carrier communication Device on-line monitoring system.
Background technology
The development of electric power meter field test instrument starts from the mid-80 in the world, and the initial stage nineties is domestic Each producer is proposed the first generation field test instrument using analogue technique successively.The mid-90 is occurred in that using digital technology The second generation field test instrument of simple function.After 2000, both at home and abroad with precision height, small volume, lightweight and facilitate and easy-to-use be The third generation simple function field test instrument of feature has occurred.The current large-scale popularization third generation field test instrument of China.
Electric energy meter field check meter and PT secondary pressure drop testers only possess bis- pressures of electric energy meter error measurement and PT respectively The simple function examined drops.Current field test all-in-one need to arrange a large amount of cable access voltages, electric current secondary loop, for The normal operation in situ metrology device and loop has great risk hidden danger, is not required to arrange the testing instruments of a large amount of cables using wireless Network mode, communication is unstable, therefore fails to be promoted.
Utility model content
In view of the shortcomings of the prior art, the purpose of this utility model is to provide a kind of high voltage electric energy based on carrier communication Metering device on-line monitoring system, various measurement functions is integrated in one, and ensure the stability of data transfer.
To achieve these goals, the utility model is adopted the technical scheme that:
A kind of high-voltage electric-energy meter on-line monitoring system based on carrier communication, including measurement host, PT measurement point Machine, CT measurement extension sets and front end processor;
Front end processor is located in transformer station's master control room, and measurement host is located in the measurement screen cabinet of transformer station's master control room, PT measurements Extension set and CT measurements extension set are respectively in the PT secondary terminals case in transforming plant primary equipment area and in CT secondary terminals casees;
PT measurement extension set connection PT, CT measurement extension set connection CT, PT measurement extension sets and CT measure extension set respectively by secondary Test loop cable connects measurement host, and measurement host is also connected with front end processor and electric energy meter.
The utility model surveys the error real-time online caused by electric energy meter error real-time online measuring, PT secondary voltage drops A variety of functions such as amount and the real load on-line measurement of PT and CT are integrated in one, and expand the applied field of metering device monitoring system Close, due to using the original second test loop cable transmission sampled data of transformer station, without laying a large amount of secondary cables and two Secondary wiring, it is ensured that the normal operation of metering device and secondary circuit.
Brief description of the drawings
Fig. 1 is the structural representation of high-voltage electric-energy meter on-line monitoring system of the utility model based on carrier communication Figure;
Fig. 2 is measurement host in high-voltage electric-energy meter on-line monitoring system of the utility model based on carrier communication Circuit diagram.
Embodiment
High-voltage electric-energy meter generally by voltage transformer (PT), current transformer (CT) and power meter group into.Accordingly Ground, the error of the error and electric energy meter of the error of high-voltage electric-energy meter caused by PT errors, CT errors, PT secondary voltage drops Etc. several parts composition.The utility model exists the error caused by electric energy meter error real-time online measuring, PT secondary voltage drops in real time A variety of functions such as line measurement are integrated in one, and develop the on-line monitoring of the high-voltage electric-energy meter based on the ZAP system of innovation System, the structure to this monitoring system describes in detail below.
High-voltage electric-energy meter on-line monitoring system of the invention based on carrier communication, as shown in figure 1, including measurement master Machine, PT measurements extension set, CT measurement extension sets and front end processor.
Measurement host be located at transformer station's master control room special measurement screen cabinet in, complete voltage, electric current, power, power factor, The measurement of frequency, phase and electric energy equivalent, while completing the survey of the error caused by PT secondary voltage drops together with measuring extension set with PT Amount.
Front end processor can be placed in transformer station's master control room, complete being locally displayed and storing for measurement data, and provide The Communication Protocol Implementation Interfaces such as IEC103 and IEC61850.
PT measurement extension sets are located in PT secondary terminals casees, connect PT, complete the measurement of PT secondary loads, and with measurement host one Play error caused by completion PT secondary voltage drops etc. and measure function, independent air switch, on-line monitoring system are configured when being incorporated in PT terminals System has does not influence PT loops normally to run during exception.
CT measurement extension sets are located in CT secondary terminals casees, connect CT, complete CT secondary loads measurement function, wherein CT measurements Extension set obtains CT electric currents by sensing, does not seal in existing CT loops, it is ensured that existing CT loops are normally run, and are not influenceed The sampling in existing CT loops.
Measurement host circuit theory diagrams are as shown in Figure 2.Tested instrument side three-phase alternating voltage Ua, Ub, Uc and three intersect Stream electric current Ia, Ib, Ic are sequentially ingressed into signal condition and multi-path choice module, and MCU passes through High Speed Serial 1 or keyboard processor special LPC932 judges the control command inputted by front end processor or the keyboard commands by input through keyboard, and according to control command or key Disk command-control signal is nursed one's health and multi-path choice module, selects the two-way input signal with appropriate range and base of sampling all the way Calibration signal, is respectively fed to the input of 16 analog-digital converter A/D1 and A/D2 and digital frequency multiplier.By digital frequency multiplier Output signal control two analog-digital converters to carry out analog-to-digital conversion simultaneously, transformation result A/D1 and A/D2 send into 32 MCU Middle progress calculating processing, completes the measurement of voltage, electric current, power and electric energy equivalent.Meanwhile, MCU is surveyed by High Speed Serial 2 to PT Measure extension set and send secondary voltage drop measuring command, and make the output signal of digital frequency multiplier, pass through original second test return line Cable controls the analog-digital converter of PT measurement extension sets as carrier, while measuring the voltage amplitude at voltage transformer secondary side PT ends Value, voltage-phase and energy value, the difference of its value are to include the secondary voltage drop and PT secondary voltage drops than difference and angular difference information Caused electric energy measurement error.In addition, the six tunnel measured signals by shaping directly input MCU, by MCU measure its frequency and Phase difference.Then, measured measurement result is sent into front end processor by High Speed Serial 1 or is sent directly into lattice lcd and shown by MCU Show that device is shown.
In the design of hardware circuit, the modulate circuit of voltage signal employs precision resister potential-divider network;Electric current is believed Number conditioning employ software and hardware comprehensive compensation technique;Power unit employs switch power technology.So as to substantially reduce instrument The volume and weight of device.
Front end processor is special EPIC standard industrial controls machine.The wide temperature TFT liquid crystal displays of 8.4 " technical grades, stainless steel are employed in design Metal decking and keyboard, solid-state electronic hard disk, in the reinforcement measure such as plate SDRAM and relay protection power supply, reliability is high.Meanwhile, should Front end processor can control up to eight measurement masters provided with eight HSSI High-Speed Serial Interfaces, two 100M Ethernet interfaces and two RS485 mouthfuls Machine, and various networking requirements can be met.
Measure extension set voltage, current sample design and data-transmission mode identical with main frame, do not repeat again.Need especially Illustrate, the original second test loop cable of transformer station is respectively adopted as carrier in PT measurement extension sets and CT measurement extension sets, By data transfer to measurement host, i.e., so-called carrier communication, without laying a large amount of secondary cables and secondary connection, it is ensured that The normal operation of metering device and secondary circuit.
As a preferred embodiment, measurement host includes MCU, High Speed Serial 1, High Speed Serial 2, High Speed Serial 3, mark Quasi- source 1 and standard source 2.As shown in Fig. 2 the one end of High Speed Serial 1 connects front end processor, other end connection MCU, the one end of High Speed Serial 2 Connection PT measurement extension sets, other end connection MCU, the one end of High Speed Serial 3 connection CT measurement extension sets, the other end connects MCU, and MCU is also Standard source 1 and standard source 2 are connected respectively.
The data that two standard sources are obtained to measurement are contrasted, and are accomplished that the online error checking of electric energy meter.Mark The configuration in quasi- source:Standard scale grade:0.02 grade.Verification contrast can be carried out to live critical point and non-Source of Gateway Meter.Double standard sources are matched somebody with somebody Put, can mutually compare reference, verified without scene, error is excessive, sends alarm prompt.Measurement host then records announcement Alert fore-and-aft survey data, preserve data for work such as the electric quantity compensatings of troubleshooting.
Above-listed detailed description is illustrating for the utility model possible embodiments, and the embodiment is simultaneously not used to limitation The scope of the claims of the present utility model, all equivalence enforcements or change without departing from carried out by the utility model are intended to be limited solely by this case In the scope of the claims.

Claims (3)

1. a kind of high-voltage electric-energy meter on-line monitoring system based on carrier communication, it is characterised in that
Including measurement host, PT measurements extension set, CT measurement extension sets and front end processor;
Front end processor is located in transformer station's master control room, and measurement host is located in the measurement screen cabinet of transformer station's master control room, PT measurement extension sets Extension set is measured respectively in the PT secondary terminals casees in transforming plant primary equipment area and in CT secondary terminals casees with CT;
PT measurement extension set connection PT, CT measurement extension set connection CT, PT measurement extension sets and CT measurement extension sets pass through second test respectively Loop cable connection measurement host, measurement host is also connected with front end processor and electric energy meter.
2. the high-voltage electric-energy meter on-line monitoring system according to claim 1 based on carrier communication, its feature exists In,
Measurement host includes MCU, High Speed Serial 1, High Speed Serial 2, High Speed Serial 3, standard source 1 and standard source 2;
The one end of High Speed Serial 1 connects front end processor, other end connection MCU, the one end of High Speed Serial 2 connection PT measurement extension sets, the other end MCU is connected, the one end of High Speed Serial 3 connection CT measurement extension sets, the other end connects MCU, and MCU is also respectively connected with standard source 1 and standard Source 2.
3. the high-voltage electric-energy meter on-line monitoring system according to claim 2 based on carrier communication, its feature exists In,
Front end processor be EPIC standard industrial control machines, including the wide temperature TFT liquid crystal displays of 8.4 〞 technical grades, stainless steel metal panel and keyboard, Solid-state electronic hard disk, in plate SDRAM and relay protection power supply, meanwhile, in addition to eight HSSI High-Speed Serial Interfaces, two 100M Ethernet interfaces With two RS485 mouthfuls.
CN201621266340.XU 2016-11-24 2016-11-24 High-voltage electric-energy meter on-line monitoring system based on carrier communication Active CN206557369U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201621266340.XU CN206557369U (en) 2016-11-24 2016-11-24 High-voltage electric-energy meter on-line monitoring system based on carrier communication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201621266340.XU CN206557369U (en) 2016-11-24 2016-11-24 High-voltage electric-energy meter on-line monitoring system based on carrier communication

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CN206557369U true CN206557369U (en) 2017-10-13

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109725279A (en) * 2018-12-26 2019-05-07 国网江苏省电力有限公司电力科学研究院 A kind of electric energy metering device compares synthetical error analysis platform online
CN110673081A (en) * 2019-10-18 2020-01-10 国网福建省电力有限公司 Intelligent electric meter error online estimation method based on edge calculation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109725279A (en) * 2018-12-26 2019-05-07 国网江苏省电力有限公司电力科学研究院 A kind of electric energy metering device compares synthetical error analysis platform online
CN110673081A (en) * 2019-10-18 2020-01-10 国网福建省电力有限公司 Intelligent electric meter error online estimation method based on edge calculation
CN110673081B (en) * 2019-10-18 2021-10-29 国网福建省电力有限公司 Intelligent electric meter error online estimation method based on edge calculation

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