CN207396559U - Intelligent transformer substation grounding network potential difference Jamming Signal Simulation waveform generator - Google Patents
Intelligent transformer substation grounding network potential difference Jamming Signal Simulation waveform generator Download PDFInfo
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- CN207396559U CN207396559U CN201721458097.6U CN201721458097U CN207396559U CN 207396559 U CN207396559 U CN 207396559U CN 201721458097 U CN201721458097 U CN 201721458097U CN 207396559 U CN207396559 U CN 207396559U
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Abstract
The utility model discloses a kind of intelligent transformer substation grounding network potential difference Jamming Signal Simulation waveform generators, it is characterised in that：Including upper PC machine and signal generator host two parts, the signal generator host includes FPGA controller, digital isolation circuit A, digital isolation circuit B, D/A converting circuit, signal conditioning circuit, signal back production circuit；The host computer is connected to FPGA controller by ethernet communication interface, and FPGA controller is connected to D/A converting circuit through digital isolation circuit A, and D/A converting circuit after signal conditioning circuit using being connected to signal output part；FPGA controller is connected to signal back production circuit through digital isolation circuit B, and the output of signal back production circuit is connected to signal output part.This signal generator can generate the intelligent transformer substation grounding network potential difference interference signal of emulation, and pass through digital analog converter and be converted into analog signal output, be applied to collecting unit, complete test.
Description
Technical field
The utility model is related to intelligent substation fields, and in particular to a kind of intelligent transformer substation grounding network potential difference interference letter
Number simulation waveform generator.
Background technology
Intelligent substation disconnecting switch, breaker are operated or disconnecting switch, breaker occur earth fault when,
Considerably more intense fast transient overvoltage VFTO can be generated, VFTO is distributed in the grounded screen of electronic mutual inductor, is formed strong
Grounded screen potential difference interference signal, and be coupled to the collecting unit of electronic mutual inductor front end, collecting unit caused to work out
Now abnormal, reset possibly even causes collector to damage, so as to influence the stable operation of whole system.Therefore need to electricity
The principle and the form of expression of minor mutual inductor collecting unit grounded screen interference are analyzed, and are proposed reliable and effective anti-interference are arranged
It applies.
For the mechanism and the form of expression of electronic mutual inductor collecting unit grounded screen interference of analyzing and researching, and propose electronics
The interference protection measure of formula mutual inductor collecting unit reply grounded screen interference, the utility model proposes a kind of intelligent transformer substation grounding networks
Potential difference Jamming Signal Simulation waveform generator for simulating intelligent transformer substation grounding network potential difference interference signal, and passes through number
Mode converter is converted into analog signal output, is applied to the collecting unit of electronic mutual inductor front end, and it is former to complete grounded screen interference
Reason test, to verify interference protection measure.
Utility model content
To solve deficiency of the prior art, the utility model provides a kind of intelligent transformer substation grounding network potential difference interference letter
Number simulation waveform generator, which can generate the intelligent transformer substation grounding network potential difference interference signal of emulation, and pass through number
Mode converter is converted into analog signal output, is applied to collecting unit, completes test.
In order to realize above-mentioned target, the utility model adopts the following technical solution：A kind of intelligent transformer substation grounding network current potential
Poor Jamming Signal Simulation waveform generator, it is characterised in that：Including upper PC machine and signal generator host two parts, the letter
Number generator host includes FPGA controller, digital isolation circuit A, digital isolation circuit B, D/A converting circuit, signal condition
Circuit, signal back production circuit；The host computer is connected to FPGA controller by ethernet communication interface, and FPGA controller is through number
Word isolation circuit A is connected to D/A converting circuit, and D/A converting circuit after signal conditioning circuit using being connected to signal output
End；FPGA controller is connected to signal back production circuit through digital isolation circuit B, and it is defeated that the output of signal back production circuit is connected to signal
Outlet.
A kind of foregoing intelligent transformer substation grounding network potential difference Jamming Signal Simulation waveform generator, it is characterized in that：It is described
Host computer is used for will be under the recorder data and nominal situation of field measurement acquisition intelligent transformer substation grounding network potential difference interference signal
Fundamental wave data, which merge, imports signal generator host.
A kind of foregoing intelligent transformer substation grounding network potential difference Jamming Signal Simulation waveform generator, it is characterized in that：It is described
Digital isolation circuit A, digital isolation circuit B use ADUM262N digital isolators.
A kind of foregoing intelligent transformer substation grounding network potential difference Jamming Signal Simulation waveform generator, it is characterized in that：It is described
D/A converting circuit uses AD9117 digital analog converters.
A kind of foregoing intelligent transformer substation grounding network potential difference Jamming Signal Simulation waveform generator, it is characterized in that：It is described
Signal conditioning circuit includes DAC Buffer, and the differential signal DAC+ of input is grounded by resistance R9, the differential signal DAC- of input
It is grounded by resistance R10, capacitance C9 is in parallel with resistance R9, and capacitance C10 is in parallel with resistance R10；Differential signal DAC+ is through resistance R1
Positive differential input terminal+the IN, differential signal DAC- for being connected to DAC Buffer D7 are connected to the negative of DAC Buffer D7 through resistance R2
Differential input end-IN；Positive supply input terminal+the VS of DAC Buffer D7 is grounded after capacitance C1 parallel with one another, capacitance C2, D7
Negative supply input terminal-VS be grounded after capacitance C3 parallel with one another, capacitance C4；The PD signal ends of DAC Buffer D7 pass through electricity
Hinder R4 pull-up；The OUT signal end of DAC Buffer D7 is connected to the FB signal ends of D7, D7 through resistance R5 parallel with one another, capacitance C5
FB signal ends the REF signal end of D7 is connected to through resistance R6 parallel with one another, capacitance C6；The REF signal end of DAC Buffer D7
It is connected to the central contact of potentiometer RL1；The OUT signal end of DAC Buffer D7 is connected to signal output VOUT through resistance R7, together
When D7 OUT signal end be connected to the positive input of operational amplifier D8, the reverse input end of operational amplifier D8 is connected to
The output terminal of D8, the output terminal of D8 are connected to feedback signal V_FEEK output terminals.
A kind of foregoing intelligent transformer substation grounding network potential difference Jamming Signal Simulation waveform generator, it is characterized in that：It is described
Signal back production circuit is sent to FPGA for gathering the analog signal through signal conditioning circuit output and converting thereof into digital quantity
Controller, signal back production circuit realize analog-to-digital conversion using AD7606-4.
A kind of foregoing intelligent transformer substation grounding network potential difference Jamming Signal Simulation waveform generator, it is characterized in that：It is described
FPGA controller uses the XC3SD3400A field programmable gate arrays of XILINX companies.
The advantageous effect that the utility model is reached：
(1) the utility model by host computer to be configured, Data Integration, than general signal generator using more
It is convenient, it is flexibly, with better function；
(2) using the interference waveform recorder data of intelligent substation field measurement for testing, specific aim is stronger, can be true
Simulate the interference at intelligent substation scene；
(3) by the way that digital loop and analog loopback are carried out digital isolation, the influence of noise of digital loop is avoided to simulating
Signal, so as to obtain higher output accuracy；
(4) by export signal sampling, and feed back to FPGA controller to output signal adjusted in real time, it is ensured that
Export the accuracy of signal.
Description of the drawings
Fig. 1 is the schematic block circuit diagram of the utility model；
Fig. 2 is signal conditioning circuit structure chart.
Specific embodiment
The utility model is further described below in conjunction with the accompanying drawings.Following embodiment is only used for clearly illustrating this
The technical solution of utility model, and cannot the scope of protection of the utility model be limited with this.
As shown in Figure 1, a kind of intelligent transformer substation grounding network potential difference Jamming Signal Simulation waveform generator, including upper PC
Machine and signal generator host two parts, wherein signal generator host include FPGA controller, digital isolation circuit A, number
Isolation circuit B, D/A converting circuit, signal conditioning circuit, signal back production circuit；Host computer is connected by ethernet communication interface
To the FPGA controller of signal generator host, FPGA controller is connected to D/A converting circuit, digital-to-analogue through digital isolation circuit A
Conversion circuit after signal conditioning circuit using being connected to signal output part；FPGA controller is connected to through digital isolation circuit B
Signal back production circuit, the output of signal back production circuit are also connected to signal output part.
The signal generator can generate the intelligent transformer substation grounding network potential difference interference signal of emulation, and pass through digital-to-analogue conversion
Device is converted into analog signal output, is applied to collecting unit, completes test.
The host computer is used to obtain field measurement the recorder data of intelligent transformer substation grounding network potential difference interference signal
Merge with fundamental wave data under nominal situation, arrange, generate new Wave data and import signal generator host；Host computer and master
It is communicated between machine by ether net mode, is configured and instructed by host computer and issue, can realized pair using this mode
Host output simulation waveform flexibly set, including can set superposition disturb at the beginning of carve, interference time, simulation electronic formula is mutual
The simulation waveform after interference signal is superimposed under the operating modes such as sensor zero load, on-load, the electronic type that can also simulate different principle is mutual
Waveform after sensor superposition interference signal.
The FPGA controller uses the XC3SD3400A field programmable gate arrays of XILINX companies.FPGA controller is
The core of signal generator host for receiving instruction and the Wave data that host computer issues, and is controlled through digital isolation circuit A
Wave data is converted into analog signal by D/A converting circuit, while FPGA controller is also through digital isolation circuit B control signals
Back production circuit completes the sampling and digital-to-analogue conversion of the analog signal to signal conditioning circuit output, and receives signal back production circuit warp
The data of digital isolation circuit B feedbacks.The waveform that the feedback data and FPGA controller that are obtained from signal back production circuit are issued
Data are compared, and adjust the analog signal of output accordingly, realize the closed-loop control to signal generator output signal, really
Protect the accuracy of output signal.
The number isolation circuit A, digital isolation circuit B use ADUM262N digital isolators.Digital isolation circuit
For carrying out electrical isolation to FPGA controller and D/A converting circuit and signal back production circuit, making an uproar for digital circuits section is prevented
Acoustic jamming is to the signal of analog loopback so as to influencing the precision of signal output.
D/A converting circuit uses AD9117 digital analog converters.AD9117 has 14 bit resolutions, 125MSPS conversion speed
The features such as rate, low-power consumption, meets grounded screen potential difference interference simulation demand.
Signal of the signal conditioning circuit for the output of logarithm analog conversion circuit is nursed one's health.Due to AD9117 digital analog converters
It is exported for differential current mode, therefore the differential signal for being exported AD9117 by DAC Buffer carries out conditioning and is amplified and converted to
Voltage signal exports.The DAC Buffer uses AD8130.AD8130 is a preferable complementary elements, has larger put down
Weighing apparatus input impedance, and with outstanding exchange common mode rejection performance.AD8130 frequency response bandwidths are 270MHz, support AD9117
The a maximum of about of output frequency of 40MHz generated in maximum slew rate.
As shown in Fig. 2, the schematic diagram for output signal conditioning circuit.
In figure, the differential signal DAC+ of input is grounded by resistance R9, and the differential signal DAC- of input is connect by resistance R10
Ground, resistance R9, resistance R10 are used to the current signal of input being transformed into voltage signal.Capacitance C9 is in parallel with resistance R9, capacitance
C10 is in parallel with resistance R10, for reducing signal noise.
Differential signal DAC+ is connected to positive differential input terminal+IN, differential signal the DAC- warp of DAC Buffer D7 through resistance R1
Resistance R2 is connected to the negative differential input end-IN of DAC Buffer D7, and series resistance R1, R2 are for improving Differential input circuit
Whole distortion performance, resistance R1, resistance R2 resistance values are 49.9 Ω, precision 0.1%, temperature stability 5ppm.
Positive supply input terminal+the VS of DAC Buffer D7 is grounded after capacitance C1 parallel with one another, capacitance C2, the negative electricity of D7
Source input terminal-VS is grounded after capacitance C3 parallel with one another, capacitance C4, capacitance C1, capacitance C2, capacitance C3, capacitance C4 for pair
Power decoupling.
The PD signal ends of DAC Buffer D7 are pulled up by resistance R4, to exit power down protection pattern.
The OUT signal end of DAC Buffer D7 is connected to the FB signal ends of D7, D7 through resistance R5 parallel with one another, capacitance C5
FB signal ends be connected to the REF signal end of D7 through resistance R6 parallel with one another, capacitance C6, resistance R5, resistance R6 are for setting
The gain of signal conditioning circuit, capacitance C5, capacitance C6 are used to filter out signal noise.The REF signal end of DAC Buffer D7 is connected to
The central contact of potentiometer RL1 can be modified the output signal of DAC Buffer D7 by adjusting potentiometer RL1.
The OUT signal end of DAC Buffer D7 is connected to signal output VOUT, while the OUT signal end of D7 through resistance R7
The positive input of operational amplifier D8 is connected to, the reverse input end of operational amplifier D8 is connected to the output terminal of D8, D8's
Output terminal is connected to feedback signal V_FEEK output terminals.The operational amplifier D8 will export signal replication as voltage follower
Feedback signal V_FEEK is generated, signal back production circuit is supplied to gather.
Signal back production circuit is sent out for gathering the analog signal through signal conditioning circuit output and converting thereof into digital quantity
Give FPGA controller.Signal back production circuit realizes analog-to-digital conversion using AD7606-4.AD7606-4 be a 16 bit resolution,
Charge scaling, gradual approaching A/D converter, are powered using single supply, built-in frequency overlapped-resistable filter and reference voltage source,
Simulation input impedance reaches 1M Ω, and there is no need to carry out preposition conditioning to input signal.
In addition, in the design, to ensure good overall performance, radio frequency circuit board placement-and-routing technology should be used to carry out
Design and making sheet.All ground planes and bus plane below the simulation output of high-speed A/D converter and amplifier pin should be free of
Copper prevents from forming parasitic capacitance between ground connection input, output pin.Input, output terminal resistance, shunt capacitance should be as close to
High speed device, output loading ground connection and shunt capacitance ground connection should be back to the same point on ground plane, so that cabling stray inductance,
Jingle bell vibration is minimum.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, on the premise of the utility model technical principle is not departed from, several improvement and deformation can also be made, these change
The scope of protection of the utility model is also should be regarded as into deformation.
Claims (7)
1. a kind of intelligent transformer substation grounding network potential difference Jamming Signal Simulation waveform generator, it is characterised in that：Including upper PC
Machine and signal generator host two parts, the signal generator host include FPGA controller, digital isolation circuit A, number
Isolation circuit B, D/A converting circuit, signal conditioning circuit, signal back production circuit；The host computer passes through ethernet communication interface
FPGA controller is connected to, FPGA controller is connected to D/A converting circuit through digital isolation circuit A, and D/A converting circuit passes through again
Signal output part is connected to after crossing signal conditioning circuit；FPGA controller is connected to signal back production circuit through digital isolation circuit B,
The output of signal back production circuit is connected to signal output part.
2. a kind of intelligent transformer substation grounding network potential difference Jamming Signal Simulation waveform generator according to claim 1,
It is characterized in：The host computer be used for by field measurement obtain intelligent transformer substation grounding network potential difference interference signal recorder data with
Fundamental wave data, which merge, under nominal situation imports signal generator host.
3. a kind of intelligent transformer substation grounding network potential difference Jamming Signal Simulation waveform generator according to claim 1,
It is characterized in：The number isolation circuit A, digital isolation circuit B use ADUM262N digital isolators.
4. a kind of intelligent transformer substation grounding network potential difference Jamming Signal Simulation waveform generator according to claim 1,
It is characterized in：The D/A converting circuit uses AD9117 digital analog converters.
5. a kind of intelligent transformer substation grounding network potential difference Jamming Signal Simulation waveform generator according to claim 1,
It is characterized in：The signal conditioning circuit includes DAC Buffer, and the differential signal DAC+ of input is grounded by resistance R9, input
Differential signal DAC- is grounded by resistance R10, and capacitance C9 is in parallel with resistance R9, and capacitance C10 is in parallel with resistance R10；Differential signal
Positive differential input terminal+the IN, differential signal DAC- that DAC+ is connected to DAC Buffer D7 through resistance R1 are connected to DAC through resistance R2
Negative differential input end-the IN of buffer D7；Positive supply input terminal+the VS of DAC Buffer D7 is through capacitance C1 parallel with one another, capacitance
It is grounded after C2, the negative supply input terminal-VS of D7 is grounded after capacitance C3 parallel with one another, capacitance C4；The PD letters of DAC Buffer D7
Number end is pulled up by resistance R4；The OUT signal end of DAC Buffer D7 is connected to D7's through resistance R5 parallel with one another, capacitance C5
FB signal ends, the FB signal ends of D7 are connected to the REF signal end of D7 through resistance R6 parallel with one another, capacitance C6；DAC Buffer D7
REF signal end be connected to the central contact of potentiometer RL1；The OUT signal end of DAC Buffer D7 is connected to signal through resistance R7
VOUT is exported, while the OUT signal end of D7 is connected to the positive input of operational amplifier D8, operational amplifier D8's is reversed defeated
Enter the output terminal that end is connected to D8, the output terminal of D8 is connected to feedback signal V_FEEK output terminals.
6. a kind of intelligent transformer substation grounding network potential difference Jamming Signal Simulation waveform generator according to claim 1,
It is characterized in：The signal back production circuit is for analog signal of the acquisition through signal conditioning circuit output and converts thereof into digital quantity
FPGA controller is sent to, signal back production circuit realizes analog-to-digital conversion using AD7606-4.
7. a kind of intelligent transformer substation grounding network potential difference Jamming Signal Simulation waveform generator according to claim 1,
It is characterized in：The FPGA controller uses the XC3SD3400A field programmable gate arrays of XILINX companies.
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| CN201721458097.6U CN207396559U (en) | 2017-11-03 | 2017-11-03 | Intelligent transformer substation grounding network potential difference Jamming Signal Simulation waveform generator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107589283A (en) * | 2017-11-03 | 2018-01-16 | 国网江苏省电力公司电力科学研究院 | Intelligent transformer substation grounding network potential difference Jamming Signal Simulation waveform generator |
| CN110162500A (en) * | 2019-06-03 | 2019-08-23 | 济南浪潮高新科技投资发展有限公司 | A kind of Waveform generation method and system based on Internet of Things mode |
-
2017
- 2017-11-03 CN CN201721458097.6U patent/CN207396559U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107589283A (en) * | 2017-11-03 | 2018-01-16 | 国网江苏省电力公司电力科学研究院 | Intelligent transformer substation grounding network potential difference Jamming Signal Simulation waveform generator |
| CN110162500A (en) * | 2019-06-03 | 2019-08-23 | 济南浪潮高新科技投资发展有限公司 | A kind of Waveform generation method and system based on Internet of Things mode |
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