CN101655515A - Digital multimeter - Google Patents
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- CN101655515A CN101655515A CN200910158002A CN200910158002A CN101655515A CN 101655515 A CN101655515 A CN 101655515A CN 200910158002 A CN200910158002 A CN 200910158002A CN 200910158002 A CN200910158002 A CN 200910158002A CN 101655515 A CN101655515 A CN 101655515A
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Abstract
The invention relates to a digital multimeter which comprises a signal access module, a decoding module, a processing module and a display module which are connected sequentially, wherein the signal access module is used for receiving signal data to be measured in an optical signal mode, converting the signal data into signals to be measured in an electric signal mode, and outputting the signals to the decoding module; the decoding module is used for decoding the signals to be measured in the electric signal mode, and outputting the signals to the processing module; the processing module is used for analyzing and measuring the decoded signals to be measured, obtaining the measuring result, and outputting the measuring result to the display module; and the display module is used for displaying the measuring result. The digital multimeter can measure the signal amount of the equipment in a digital transformer substation, and is convenient for maintenance, debugging and accident maintenance of the digital transformer substation.
Description
Technical field
The present invention relates to the electronic surveying field, relate in particular to a kind of digital multimeter.
Background technology
Digital transformer substation is the developing direction of Future Power System transformer station, becomes the important component part of digital power grid.The digital transformer substation principal feature is to divide layer building by intelligent primary equipment and networked secondary device, be to be based upon IEC (International Electro Technical Commission, International Electrotechnical Commission) on the 61850 protocol specification bases, can realize the modernized transformer station of the information sharing of intelligent electric equipment room and interoperability in the transformer station.Digital transformer substation adopts electronic type or photo-electric mutual inductor to realize signal measurement, and directly export digital signal at secondary side and be transmitted through the fiber to merge cells, data according to IEC61850-9-1, IEC61850-9-2, IEC60044-8 protocol packing after, realize the batch data transmission through optical fiber again.Digital transformer substation adopts intelligent switch or intelligent terminal, adopts GOOSE message and fiber optic Ethernet transmitting switch amount signal, has improved the availability of signal and the antijamming capability of signal greatly.
At present, the digital transformer substation of domestic input trial run, if it is out of joint to be in operation, power consumer is that the personnel of handle assembly manufacturer notify the scene to solve basically.Digital transformer substation and traditional substation operation and maintenance differ greatly, and voltage, the electric current of traditional mutual inductor output have all become the data stream in the network in digital transformer substation, and the operations staff cannot see, can not touch.Pointer multimeter in the past, digimer, pincerlike meter are measured the secondary voltage electric current, in digital transformer substation, all become and to measure, this has brought very big inconvenience for operation, maintenance, debugging and break down maintenance, also not too meets present operations staff's the thinking habit and the structure of knowledge.Aspect switching value, the empty node signal of traditional transformer station has all become the GOOSE in the network (Generic Object Oriented Substation Event is towards the transformer substation case of general object) message, can't be with showing its break-make of instrumentation amount.The tripping operation of traditional protection device all is a GOOSE net all through pressing plate really up to the mark and open into the amount and the amount of leaving now, after protection is withdrawed from, obviously has not been electrically connected separation, and it is unknown leaving the message What gives.In addition, in the digital transformer substation, each device will adopt GPS (Global Positioning System, GPS) pulse signal or IRIG-B sign indicating number (Inter-Range Instrumentation Group-B, serial time permutation code) signal is as unified clock signal or the sampling synchronization pulse in full station, and the situation of gps signal also needs certain meter meter and measures.
Therefore, in the use of digital transformer substation, need a kind of survey instrument to measure the semaphore of equipment in the digital transformer substation, with maintenance, debugging and the break down maintenance that makes things convenient for digital transformer substation.
Summary of the invention
Technical matters to be solved by this invention provides a kind of digital multimeter, can measure the semaphore of equipment in the digital transformer substation, with maintenance, debugging and the break down maintenance that makes things convenient for digital transformer substation.
For solving the problems of the technologies described above, the present invention proposes a kind of digital multimeter, comprise the signal access module, decoder module, processing module and the display module that link to each other in turn, wherein:
Described signal access module is used for the measured signal data of receiving optical signals form, and is converted to the measured signal of electrical signal form, exports to described decoder module;
Described decoder module is used for the measured signal of described electrical signal form is decoded, and exports to described processing module;
Described processing module is used for decoded measured signal is resolved, measured, and obtains measurement result, and this measurement result is exported to described display module;
Described display module is used for described measurement result is shown.
Further, above-mentioned digital multimeter also can have following characteristics, and described signal access module comprises first signal access module, secondary signal access module, the 3rd signal access module and the 4th signal access module, wherein:
First signal access module is used to receive the serial fiber data that meets the IEC60044-8 consensus standard, and is converted to the measured signal of electrical signal form, exports to described decoder module;
The secondary signal access module is used to receive the fiber data that meets IEC61850-9-1 or IEC61850-9-2 consensus standard, and is converted to the measured signal of electrical signal form, exports to described decoder module;
The 3rd signal access module is used to receive the fiber data of GOOSE switching value, and is converted to the measured signal of electrical signal form, exports to described decoder module;
The 4th signal access module, be used to receive GPS to the time signal fiber data, and be converted to the measured signal of electrical signal form, export to described decoder module.
Further, above-mentioned digital multimeter also can have following characteristics, and described decoder module comprises first decoder module, second decoder module, the 3rd decoder module and the 4th decoder module, wherein:
First decoder module is used for the measured signal that the serial optical fiber data that meet the IEC60044-8 consensus standard are converted to after the electrical signal form is decoded, and exports to described processing module;
Second decoder module is used for the measured signal that the fiber data that meets IEC61850-9-1 or IEC61850-9-2 consensus standard is converted to after the electrical signal form is decoded, and exports to described processing module;
The 3rd decoder module is used for the measured signal that fiber data to the GOOSE switching value is converted to after the electrical signal form and decodes, and exports to described processing module;
The 4th decoder module, be used for to GPS to the time signal the measured signal that is converted to after the electrical signal form of fiber data decode, export to described processing module.
Further, above-mentioned digital multimeter also can have following characteristics, also comprises the command reception module, is used to receive user instruction, sends described processing module to; Described processing module is used for according to described user instruction decoded measured signal being resolved, being measured, and obtains measurement result, and this measurement result is exported to described display module.
Further, above-mentioned digital multimeter also can have following characteristics, and described measurement result comprises measured value and/or measurement pattern.
Further, above-mentioned digital multimeter also can have following characteristics, and described measured value comprises voltage, electric current, frequency, power, electric flux, switching value, the quality of power supply and (/ or) gps signal.
Further, above-mentioned digital multimeter also can have following characteristics, and the described quality of power supply comprises frequency departure, voltage deviation, harmonic wave, voltage fluctuation and flickering, tri-phase unbalance factor, voltage swells, rapid drawdown and interruption.
Further, above-mentioned digital multimeter also can have following characteristics, and described measurement pattern comprises voltage oscillogram, current waveform figure, phasor graph and preface spirogram.
Digital multimeter of the present invention can be measured the semaphore of equipment in the digital transformer substation, makes things convenient for maintenance, debugging and the break down maintenance of digital transformer substation.
Description of drawings
Fig. 1 is the structural drawing of digital multimeter in the embodiment of the invention;
Fig. 2 is the signal source synoptic diagram of signal access module among Fig. 1;
Fig. 3 is the structural drawing of signal access module among Fig. 1;
Fig. 4 is the structural drawing of decoder module among Fig. 1;
Fig. 5 is a kind of specific implementation circuit diagram of the second/three signal access module among Fig. 3;
Fig. 6 is a kind of specific implementation circuit diagram of the first/four signal access module among Fig. 3;
Fig. 7 is a kind of concrete structure figure of digital multimeter of the present invention;
Fig. 8 is the FPGA built-in function block diagram in the embedded type CPU system of digital multimeter among Fig. 7.。
Embodiment
Below in conjunction with accompanying drawing principle of the present invention and feature are described, institute gives an actual example and only is used to explain the present invention, is not to be used to limit scope of the present invention.
Fig. 1 is the structural drawing of digital multimeter in the embodiment of the invention, as shown in Figure 1, digital multimeter comprises signal access module 11, decoder module 12, processing module 13 and the display module 14 that links to each other in turn in the embodiment of the invention, wherein: signal access module 11, be used to receive the measured signal data of fiber-optic signal form, and be converted to the measured signal of electrical signal form, export to decoder module 12; Decoder module 12 is used for the measured signal of electrical signal form is decoded, and exports to processing module 13; Processing module 13 is used for decoded measured signal is resolved, measured, and obtains measurement result, and this measurement result is exported to display module 14; Display module 14 is used for measurement result is shown.Digital multimeter of the present invention is by cid file configuration measurand information.
Digital multimeter of the present invention can provide following measurement function:
1) supports to meet in the digital transformer substation measurement of the voltage and current signal of IEC-61850-9-1, IEC-61850-9-2, IEC-60044-8 consensus standard;
2) can carry out voltage, electric current, frequency measurement, can carry out voltage current waveform and show, phasor graph shows, the preface spirogram shows;
3) can carry out power and electric flux measures;
4) can carry out quality of power supply medium frequency deviation, voltage deviation, harmonic wave, voltage fluctuation and flickering, tri-phase unbalance factor, voltage swells, rapid drawdown and interruption measures;
5) can carry out switching value GOOSE message measures;
6) can carry out GPS pps pulse per second signal, branch pulse signal, IRIG-B sign indicating number on off test;
Fig. 2 is the signal source synoptic diagram of signal access module among Fig. 1; as seen from Figure 2; signal access module 11 can receive the output signal of merge cells in the digital transformer substation or combiner; signal can be gone in the merge cells termination; also can insert at protection, observing and controlling or IED device end; also can connect from process layer and wall switch, support meets the access of the signal of IEC60044-8, IEC61850-9-1, IEC61850-2 consensus standard.In addition, signal access module 11 also can insert the GOOSE net, receives the GOOSE message, measures the switching value signal in the digital transformer substation, the GPS that also can insert digital transformer substation divide pulse, pulse per second (PPS) to the time signal, the clock signal of IRIG-B sign indicating number etc.
Fig. 3 is the structural drawing of signal access module among Fig. 1, as shown in Figure 3, in order to adapt to different access signals, signal access module 11 may further include first signal access module 111, secondary signal access module 112, the 3rd signal access module 113 and the 4th signal access module 114, wherein:
First signal access module 111 is used to receive the serial fiber data that meets the IEC60044-8 consensus standard, and is converted to the measured signal of electrical signal form, exports to decoder module 12;
On physical circuit, first signal access module 111 can adopt serial optical fiber data-interface.
Secondary signal access module 112 is used to receive the fiber data that meets IEC61850-9-1 or IEC61850-9-2 consensus standard, and is converted to the measured signal of electrical signal form, exports to decoder module 12;
The 3rd signal access module 113 is used for reception and meets GOOSE optical fiber message data, and is converted to the measured signal of electrical signal form, exports to decoder module 12;
On physical circuit, second, third signal access module 112,113 can adopt 100Base-FX bi-directional data transmitting-receiving fiber optic Ethernet interface, can insert the IEC61850-9-1/2 data.Fig. 5 is a kind of specific implementation circuit diagram of second, third signal access module among Fig. 3.
The 4th signal access module 114, be used to receive GPS to the time signal fiber data, and be converted to the measured signal of electrical signal form, export to decoder module 12.
On physical circuit, the 4th signal access module 114 also can adopt serial optical fiber data-interface.Fig. 6 is a kind of specific implementation circuit diagram of the first/four signal access module among Fig. 3.
Wherein, secondary signal access module 112 can become IEC61850-9-1 input or IEC61850-9-2 input by software setting.
Correspondingly, for the signal to different-format is decoded respectively, decoder module 12 may further include first decoder module 121, second decoder module 122, the 3rd decoder module 123 and the 4th decoder module 124, and Fig. 4 is the structural drawing of decoder module among Fig. 1, wherein:
First decoder module 121 is used for the measured signal that the serial optical fiber data that meet the IEC60044-8 consensus standard are converted to after the electrical signal form is decoded, and exports to processing module 13;
Second decoder module 122 is used for the measured signal that the fiber data that meets IEC61850-9-1 or IEC61850-9-2 consensus standard is converted to after the electrical signal form is decoded, and exports to and handles 13 of moulds;
The 3rd decoder module 123 is used for the measured signal that fiber data to the GOOSE switching value is converted to after the electrical signal form and decodes, and exports to and handles 13 of moulds;
The 4th decoder module 124, be used for to GPS to the time signal the measured signal that is converted to after the electrical signal form of fiber data decode, export to processing module 13.
On physical circuit, decoder module 12 can adopt FPGA (Field-Programmable GateArray, field programmable gate array) circuit.
Wherein, the measurement result of processing module 13 outputs can be a measured value, also can be measurement pattern, or the combination of the two.The signal kinds that digital multimeter can be measured according to the present invention, measured value can comprise voltage, electric current, frequency, power, electric energy value, switching value, the quality of power supply and/or gps signal, wherein, the quality of power supply may further include frequency departure, voltage deviation, harmonic wave, voltage fluctuation and flickering, tri-phase unbalance factor, voltage swells, rapid drawdown and interruption.Measurement pattern can comprise voltage oscillogram, current waveform figure, phasor graph and/or preface spirogram.
On physical circuit, processing module 13 can adopt the embedded type CPU system.
Again as shown in Figure 1, in other embodiments, digital multimeter of the present invention can also comprise command reception module 15, is used to receive user instruction, sends processing module 13 to; Processing module 13 is used for according to the user instruction that gets access to from command reception module 15 decoded measured signal being resolved, being measured, and obtains measurement result, and this measurement result is exported to described display module.
Here introduce a kind of concrete structure of realizing digital multimeter of the present invention.Fig. 7 is a kind of concrete structure figure of digital multimeter of the present invention, and as seen from Figure 7, this concrete digital multimeter comprises signal place in circuit, embedded type CPU system, man-machine interface circuit and working power.The signal place in circuit comprises: 100Base-FX bi-directional data transmitting-receiving fiber optic Ethernet interface, can insert IEC61850-9-1/2 and GOOSE message data, by FIBER INTERFACE Ethernet optical module the fiber-optic signal that inserts is converted to electric signal, electric signal is delivered to the embedded type CPU system handles after handling by PHY (Ethernet physical interface transceiver).The fiber optic serial data-interface can insert IEC60044-8 message data, GPSIRIG-B sign indicating number and GPS branch/pps pulse per second signal, and various signals are converted to electric signal by interface optical module with fiber-optic signal and directly deliver to the embedded type CPU system and handle.The embedded type CPU system comprises: the FPGA circuit, as shown in Figure 8, the FPGA circuit is mainly used in the IEC60044-8 serial signal that will insert to carry out manchester decoder and decoded result is converted to parallel signal, then parallel signal is delivered to CPU and is handled.With the GPS that inserts to the time signal carry out decoding processing and result delivered to CPU handle.IEC61850-9-1/2 after will handling through PHY and GOOSE message data are delivered to CPU and are resolved and analyze after the MAC of FPGA inside (Ethernet media access controller) handles; Cpu system is used for parsing, functional configuration file processing, result's demonstration, button processing, communication process of all kinds of access signal messages etc.CPU adopts embedded real-time operating system Vxworks, can guarantee digital transformer substation multifunctional meter real-time; The FLASH circuit is responsible for program code stored; The SDRAM circuit is for CPU provides internal memory.Man-machine interface comprises: keyboard, be mainly used in order input, menu selection etc., and comprise function key F1-F5, ESC Escape ESC, acknowledgement key Enter, key SET is set, power key, display backlight lamp brightness regulation key; LCD liquid crystal display, the demonstration that is mainly used in various measurement results comprise that numeral shows and graphic presentation, and display menu is selected for the user etc.
The device working power adopts a built-in joint NiMH battery, is full of fully after the electricity, can work more than 4 hours.
In addition, device also has a USB mouth, makes things convenient for other PC that the cid file is downloaded to this device, and this device is by cid file configuration measurand information.
Digital multimeter of the present invention can be measured the semaphore of equipment in the digital transformer substation, makes things convenient for maintenance, debugging and the break down maintenance of digital transformer substation.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a digital multimeter is characterized in that, comprises the signal access module, decoder module, processing module and the display module that link to each other in turn, wherein:
Described signal access module is used for the measured signal data of receiving optical signals form, and is converted to the measured signal of electrical signal form, exports to described decoder module;
Described decoder module is used for the measured signal of described electrical signal form is decoded, and exports to described processing module;
Described processing module is used for decoded measured signal is resolved, measured, and obtains measurement result, and this measurement result is exported to described display module;
Described display module is used for described measurement result is shown.
2. digital multimeter according to claim 1 is characterized in that, described signal access module comprises first signal access module, secondary signal access module, the 3rd signal access module and the 4th signal access module, wherein:
First signal access module is used to receive the serial fiber data that meets the IEC60044-8 consensus standard, and is converted to the measured signal of electrical signal form, exports to described decoder module;
The secondary signal access module is used to receive the fiber data that meets IEC61850-9-1 or IEC61850-9-2 consensus standard, and is converted to the measured signal of electrical signal form, exports to described decoder module;
The 3rd signal access module is used to receive the fiber data of GOOSE switching value, and is converted to the measured signal of electrical signal form, exports to described decoder module;
The 4th signal access module, be used to receive GPS to the time signal fiber data, and be converted to the measured signal of electrical signal form, export to described decoder module.
3. digital multimeter according to claim 2 is characterized in that, described decoder module comprises first decoder module, second decoder module, the 3rd decoder module and the 4th decoder module, wherein:
First decoder module is used for the measured signal that the serial optical fiber data that meet the IEC60044-8 consensus standard are converted to after the electrical signal form is decoded, and exports to described processing module;
Second decoder module is used for the measured signal that the fiber data that meets IEC61850-9-1 or IEC61850-9-2 consensus standard is converted to after the electrical signal form is decoded, and exports to described processing module;
The 3rd decoder module is used for the measured signal that fiber data to the GOOSE switching value is converted to after the electrical signal form and decodes, and exports to described processing module;
The 4th decoder module, be used for to GPS to the time signal the measured signal that is converted to after the electrical signal form of fiber data decode, export to described processing module.
4. digital multimeter according to claim 1 is characterized in that, also comprises the command reception module, is used to receive user instruction, sends described processing module to; Described processing module is used for according to described user instruction decoded measured signal being resolved, being measured, and obtains measurement result, and this measurement result is exported to described display module.
5. digital multimeter according to claim 1 is characterized in that described measurement result comprises measured value and/or measurement pattern.
6. digital multimeter according to claim 7 is characterized in that, described measured value comprises voltage, electric current, frequency, power, electric flux, switching value, the quality of power supply and (/ or) gps signal.
7. digital multimeter according to claim 8 is characterized in that the described quality of power supply comprises frequency departure, voltage deviation, harmonic wave, voltage fluctuation and flickering, tri-phase unbalance factor, voltage swells, rapid drawdown and interruption.
8. digital multimeter according to claim 7 is characterized in that, described measurement pattern comprises voltage oscillogram, current waveform figure, phasor graph and preface spirogram.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910158002A CN101655515A (en) | 2009-07-15 | 2009-07-15 | Digital multimeter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910158002A CN101655515A (en) | 2009-07-15 | 2009-07-15 | Digital multimeter |
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| CN101655515A true CN101655515A (en) | 2010-02-24 |
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| CN200910158002A Pending CN101655515A (en) | 2009-07-15 | 2009-07-15 | Digital multimeter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102135566A (en) * | 2010-01-22 | 2011-07-27 | 鸿富锦精密工业（深圳）有限公司 | Frequency testing system and frequency testing method |
| CN102759646A (en) * | 2012-07-02 | 2012-10-31 | 优利德科技(中国)有限公司 | Testing method and device of harmonic wave universal meter |
| CN104880675A (en) * | 2015-05-25 | 2015-09-02 | 苏州市华安普电力工程有限公司 | Storage battery detector |
-
2009
- 2009-07-15 CN CN200910158002A patent/CN101655515A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102135566A (en) * | 2010-01-22 | 2011-07-27 | 鸿富锦精密工业（深圳）有限公司 | Frequency testing system and frequency testing method |
| CN102759646A (en) * | 2012-07-02 | 2012-10-31 | 优利德科技(中国)有限公司 | Testing method and device of harmonic wave universal meter |
| CN104880675A (en) * | 2015-05-25 | 2015-09-02 | 苏州市华安普电力工程有限公司 | Storage battery detector |
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Application publication date: 20100224 |