CN102507994A - Power signal source capable of providing frequency division dynamic waveforms - Google Patents
Power signal source capable of providing frequency division dynamic waveforms Download PDFInfo
- Publication number
- CN102507994A CN102507994A CN2011103497671A CN201110349767A CN102507994A CN 102507994 A CN102507994 A CN 102507994A CN 2011103497671 A CN2011103497671 A CN 2011103497671A CN 201110349767 A CN201110349767 A CN 201110349767A CN 102507994 A CN102507994 A CN 102507994A
- Authority
- CN
- China
- Prior art keywords
- waveform
- output
- module
- signal
- amplitude
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention discloses a power signal source capable of providing frequency division dynamic waveforms, which comprises a communication interface module, a single chip machine module, a waveform data storage module, a phase-locked loop scanning module, a waveform digital-to-analogue conversion module and a waveform output operational amplifier, wherein the communication interface module is used for receiving a working state control signal of the power signal source; the single chip machine module is connected to the communication interface module and used for controlling the working state of the power signal source and outputting waveform working frequency; the waveform data storage module is connected to the single chip machine module and used for caching the output waveforms and phase information of the power signal source; the phase-locked loop scanning module is connected between the single chip machine module and the waveform data storage module and used for controlling output waveform frequency and phase information synthetization; the waveform digital-to-analogue conversion module is connected to the waveform data storage module and used for converting the digital output waveform information into the analogue output waveform signals; and the waveform output operational amplifier is connected to the waveform digital-to-analogue conversion module and used for amplifying analogue output model signals. The power meter detected by adopting the power signal source is capable of undertaking the missions of monitoring and managing the gird quality and measuring and metering the electric energy.
Description
Technical field
The present invention relates to a kind of electric power source signal, especially relate to a kind of electric power source signal that the frequency division dynamic waveform is provided.
Background technology
Be accompanied by further developing of the industrialization of the country; The input of electronics, power equipment increases year by year; The large-scale redevelopment of State Grid's capital construction especially in recent years and lifting, the load exponentially of national grid doubly increases, and electric network pollution is serious day by day; The reliability of operation of power networks and the security of electronic product use have been produced great influence, so also come into one's own day by day to supervision, measurement, metering and the management role of power grid quality.
At present supervision, measurement, metering and the management role to power grid quality mainly is to realize through the checkout equipment of specialty, but this traditional device purchases, detects and set up that the mode cost is high, efficient is low, can not meet the demand that industrialization of the country development is built.Consider that at present national annual electric energy meter output is about 200,000,000, accounts for 2% in the harmonic electric energy table; The accumulative total several years is nearly 10,000,000 more than, and it has covered each big and medium-sized cities, the whole nation, and the electric energy meter that this batch is eager to come into operation; Because of no feasible means for detection, be difficult to trace to the source, part can only be made supervisory instrument and use; Only be confined to traditional electric energy tariffing task, especially have the harmonic electric energy table of advanced computing power, the so simple utilization of electric energy meter has caused the serious wasting of resources.Causing the basic reason of phenomenon like this, is exactly conventional electric energy meter calibrating apparatus, and frequency division dynamic waveform signal can't be provided, and also just can't examine and determine the metering of harmonic electric energy table under each harmonic wave state.
Summary of the invention
Technical matters to be solved by this invention just provides a kind of electric power source signal that the frequency division dynamic waveform is provided.
Above-mentioned technical matters solves through following technical measures:
A kind of electric power source signal that the frequency division dynamic waveform is provided is characterized in that, comprising:
One-chip computer module 1 includes the independent clock unit in it, be used for control and output waveform frequency of operation;
Wave data memory module 2 is both-end parallel port RAM, is used for the waveform phase information of buffer memory one-chip computer module 1 output;
Phaselocked loop scan module 3 includes phase-locked loop chip and CPLD chip, and it is synthetic to be used to control output waveform frequency and phase information;
Amplitude D/A converter module 4 is the one 16 a parallel port D/A converter, is used for digital output waveform information translation is become the simulation output waveform signals;
5, the 2 16 parallel port D/A converters of waveform D/A converter module are used for digital output waveform information translation is become the simulation output waveform signals;
Waveform output operational amplifier 6 is used to amplify analog output signal;
Voltage reference module 7 is used for output reference voltage;
Communication interface modules 8 is used to receive and dispatch control signal;
Amplitude output amplifier module 9 is used to amplify analog output signal;
Described one-chip computer module 1 is through communication interface modules 8 receptions and feedback control signal, and the data of output waveform, address signal be the data port and the address mouth of the Wave data memory module 2 of described both-end parallel port extremely; The inlet end data port of the amplitude signal of output waveform to described amplitude D/A converter module 4, the phase-locked loop chip of independent clock unit outputting standard clock signal to described phaselocked loop scan module 3;
The REF mouth of described amplitude D/A converter module 4 is imported the reference voltage of described voltage reference module 7 outputs, output amplitude signal to amplitude output amplifier module 9;
The endpiece address mouth of the CPLD chip OPADD sweep signal of described phaselocked loop scan module 3 to described Wave data memory module 2;
The endpiece data output of described Wave data memory module 2 exports the data port of described waveform D/A converter module 5 to; The output of the REF mouth input amplitude output amplifier module 9 of described waveform D/A converter module 5, the output waveform signals of described waveform output operational amplifier 6 incoming wave figurate number mould modular converters 5, last output frequency division dynamic waveform.
On the basis of the above, the present invention can also do further improvement:
In order to export sliding wave-wave shape signal, also comprise the digital regulation resistance 10 that is used for the output index waveform signal and the totalizer 11 of be used to superpose sine wave signal and exponential waveform signal; Described digital regulation resistance 10 is connected between the output terminal and Voltage Reference end (ground connection) of said amplitude output operational amplifier 9; The control end of digital regulation resistance 10 is connected to the corresponding port of said one-chip computer module; The output terminal of the center tap of digital regulation resistance and said waveform output operational amplifier 6 is connected to the in-phase input end of totalizer respectively through first resistance and second resistance, the output terminal of totalizer 11 is the waveform output terminal of electric power source signal.
Electric power source signal of the present invention adopts the structure of high-speed microprocessor, dual-port parallel port storer and digital to analog converter to realize, the mode with digital processing simulation output can provide diversified frequency division dynamic waveform signal according to actual needs;
Beneficial effect of the present invention is following:
The electric power source signal that the frequency division dynamic waveform is provided of the present invention; The electric power signal of frequency division dynamic waveform can be provided; Metering under each harmonic wave state is examined and determine to the harmonic electric energy table; Make the harmonic electric energy table can be able to bear the supervision of power grid quality, measurement, metering and management role, practiced thrift national resources greatly.
Description of drawings
Below in conjunction with accompanying drawing and specific embodiment the present invention is done further detailed description:
Fig. 1 is the schematic block circuit diagram of electric power source signal embodiment one of the present invention;
Fig. 2 exports the signal flow graph of half-wave/triggering waveform for electric power source signal embodiment shown in Figure 1;
Fig. 3 exports the signal flow graph that impacts sine waveform for electric power source signal embodiment shown in Figure 1;
Fig. 4 is the signal flow graph of the sliding wave-wave shape of output of embodiment two.
Embodiment
Fig. 1 shows the embodiment one of electric power source signal of the present invention, comprises one-chip computer module 1, includes the independent clock unit in it, is used for control and output waveform frequency of operation; Wave data memory module 2 is both-end parallel port RAM, is used for the waveform phase information of buffer memory one-chip computer module 1 output; Phaselocked loop scan module 3 includes phase-locked loop chip and CPLD chip, and it is synthetic to be used to control output waveform frequency and phase information; Amplitude D/A converter module 4 is the one 16 a parallel port D/A converter, is used for digital output waveform information translation is become the simulation output waveform signals; 5, the 2 16 parallel port D/A converters of waveform D/A converter module are used for digital output waveform information translation is become the simulation output waveform signals; Waveform output operational amplifier 6 is used to amplify analog output signal; Voltage reference module 7 is used for output reference voltage; Communication interface modules 8 is used to receive and dispatch control signal; Amplitude output amplifier module 9 is used to amplify analog output signal.
One-chip computer module 1 is through communication interface modules 8 receptions and feedback control signal, and the data of output waveform, address signal be the data port and the address mouth of the Wave data memory module 2 of described both-end parallel port extremely; The inlet end data port of the amplitude signal of output waveform to described amplitude D/A converter module 4, the phase-locked loop chip of independent clock unit outputting standard clock signal to phaselocked loop scan module 3; The reference voltage of REF mouth input voltage base modules 7 outputs of amplitude D/A converter module 4, output amplitude signal to amplitude output amplifier module 9; The endpiece address mouth of CPLD chip OPADD sweep signal to the Wave data memory module 2 of phaselocked loop scan module 3; The endpiece data output of Wave data memory module 2 exports the data port of waveform D/A converter module 5 to; The output of the REF mouth input amplitude output amplifier module 9 of waveform D/A converter module 5, the output waveform signals of waveform output operational amplifier 6 incoming wave figurate number mould modular converters 5, last output frequency division dynamic waveform.
One-chip computer module 1 comprises high-speed microprocessor, independent clock unit, external crystal-controlled oscillation and timer, and independent clock unit, external crystal-controlled oscillation and timer are connected to the corresponding port of high-speed microprocessor.The independent clock unit is used to produce the reference frequency of electric power source signal, does not take single-chip microcomputer working time and storage space.It is the crystal oscillator of 22.118400M that external crystal-controlled oscillation adopts frequency, and this is a comparatively compromise scheme, has both guaranteed the speed of system, has guaranteed the stability of system again.Timer is sixteen bit, the timer of four machine cycles, is used for the control of electric power source signal output signal frequency.Be equivalent to two divided-frequency because level signal is changeed pulse signal, thereby the actual divide ratio of present embodiment electric power source signal is: 11059200Hz (crystal oscillator frequency)/4 (machine cycle)/2 (frequency division)/50Hz (desired value)=55296 (divide ratio).This value meets the job requirement of sixteen bit timer less than 65536.Then the frequency adjustment fineness of present embodiment electric power source signal is 50Hz/55296, is superior to 50Hz/50000=0.001Hz.
Wave data memory module 2 adopts both-end parallel port storer, is used to store the high resolving power all-wave waveform signal of one-period, confirms the phase place of output waveform, can repeat to write.Its memory allocation is a horizontal resolution 72000, and promptly each fundamental signal cycle is divided into 72000 points, and it is 360 degree/72000=0.005 degree that respective phase is regulated fineness; Vertical resolution is 65536, and such resolution can satisfy less distortion requirement.
It is the high stability standard of precision voltage of LM399 that voltage reference module 7 adopts model, and its degree of stability is 20PPM, is used to provide reference voltage.Said amplitude D/A converter module 4 adopts the sixteen bit D/A converter, is used for the digital-to-analog conversion of waveform signal amplitude data.Therefore, the amplitude of present embodiment electric power source signal adjusting fineness is: 1/65536 * 100% is superior to 1/50000 * 100%=0.002%.
Phaselocked loop scan module 3 comprises phase-locked loop chip, CPLD chip and external circuit, and phase-locked loop chip connects the independent clock unit in the one-chip computer module 1, and the CPLD chip connects the address B port of Wave data memory module 2.Waveform D/A converter module 5 adopts the sixteen bit D/A converter, is used for the digital-to-analog conversion of waveform signal Wave data.The amplifier module comprises at least two independently operational amplifiers.Communication interface modules 8 adopts the RS232 communication interface.
The principle of work of present embodiment electric power source signal is:
The high-resolution 1/4 cycle fundamental waveform of one-chip computer module 1 internal storage, according to actual output waveform requirement, table look-up in inside, and its all-wave waveform is mapped directly in the Wave data memory module 2.Independent clock unit output 50Hz reference frequency pulse in the one-chip computer module 1, the work of starting high-speed phase-locked loop scan module, the CPLD CPLD in the phaselocked loop scan module 3; Both made frequency multiplier; The OPADD sweep trace to 2 scannings of Wave data memory module, outputs to waveform D/A converter module 5 with Wave data simultaneously; Through waveform output operational amplifier 6, export satisfactory analog waveform again.
Electric power source signal below in conjunction with Fig. 2 ~ 3 explanation the foregoing descriptions is exported the course of work of 2 kinds of special dynamic waveforms:
As shown in Figure 2, be the signal flow graph of the electric power source signal of the foregoing description output half-wave/triggering waveform.Because of a complete fundamental waveform; Can be divided into 4 quadrants; Each quadrant took for 1/4 cycle, and one-chip computer module 1 is mapped to the sine wave of its one-period in the Wave data memory module 2, and then the storage area with Wave data memory module 2 divides quarter into; Be made as A, B, C, D respectively, then its corresponding respectively 4 sinusoidal wave quadrants.When communication interface modules 8 when one-chip computer module 1 input requires the instruction of electric power source signal output half-wave waveform; C, D zone that one-chip computer module 1 will be deposited the Wave data memory module 2 of waveform write data " 0 "; Then the waveform through the 3 scanning outputs of phaselocked loop scan module is half-wave; Pass through waveform D/A converter module 5 and waveform output operational amplifier 6 again, export satisfactory simulation half-wave voltage signal.In like manner, when communication interface modules 8 when one-chip computer module 1 input requires the electric power source signal output phase to trigger the instruction of waveform, 1 need of one-chip computer module write data " 0 " with A, the C zone of Wave data memory module 2 and get final product.
As shown in Figure 3, for the electric power source signal of the foregoing description is exported the signal flow graph that impacts sine waveform.Be that because of impacting sinusoidal wave characteristics sinusoidal wave amplitude changes in time between Ib and Fi * Ib; According to these characteristics, when communication interface modules 8 when one-chip computer module 1 input requires electric power source signal output to impact the instruction of sine waveform, the timer in the one-chip computer module 1 is minimum time of day with the standard 50Hz recurrence interval; Set as requested and impact the sinusoidal wave time interval that changes; Switch the input data of amplitude D/A converter module 4, its output is through amplitude output operational amplifier incoming wave figurate number mould modular converter 5; For waveform D/A converter module 5 provides the benchmark input; The change of this benchmark, can directly have influence on the sine wave output amplitude must change, thus sine waveform is impacted in output.The switching time of above-mentioned amplitude D/A converter module 4 input data,, can ignore basically because the present embodiment electric power source signal is to adopt high-speed microprocessor and parallel port D/A converter.In assembly language; Switch about 14 instructions; Every treaty 4 machine cycles, then switching times: 4 * 14/22.1184M=2.5 μ S, and sine wave period is 20mS; So account for the ratio of a sine wave period switching time be: 2.5mS/20mS * 100%=0.0125%, the result that sine waveform is impacted in the output of present embodiment electric power source signal is satisfactory.
As shown in Figure 4, be embodiments of the invention two, on the basis of embodiment one, also comprise the digital regulation resistance 10 that is used for the output index waveform signal and the totalizer 11 of be used to superpose sine wave signal and exponential waveform signal; Digital regulation resistance 10 is connected between the output terminal and Voltage Reference end (ground connection) of amplitude output operational amplifier 9; The control end of digital regulation resistance 10 is connected to the corresponding port of one-chip computer module; The output terminal of the center tap of digital regulation resistance and waveform output operational amplifier 6 is connected to the in-phase input end of totalizer respectively through first resistance and second resistance, the output terminal of totalizer 11 is the waveform output terminal of electric power source signal.
Fig. 4 is the signal flow graph of the sliding wave-wave shape of electric power source signal output.
Because of the essence of sliding wave-wave shape is a fundamental waveform, an e superposes
-atDirect current signal obtain.So, when communication interface modules 8 when one-chip computer module 1 input requires the instruction of the sliding wave-wave shape of electric power source signal output, preset e in the high-speed microprocessor in one-chip computer module 1
-at(1～7 sine wave period) amplitude data form of changing in time, the sixteen bit timer in the one-chip computer module 1 adopts interrupt mode, successively the data in the form is write digital regulation resistance, and the center tap of digital regulation resistance is promptly exported e
-atWaveform signal, the sine waveform signal of this waveform signal and 6 outputs of waveform output operational amplifier is through the sliding wave-wave shape of totalizer stack output.Factor word potentiometer adopts the specification of inner 100 taps, so it changes the fineness requirement that fineness is enough to satisfy sliding wave-wave deformationization, the electric power source signal of present embodiment can be exported gratifying sliding wave-wave shape.
Claims (2)
1. electric power source signal that the frequency division dynamic waveform can be provided is characterized in that comprising:
One-chip computer module (1) includes the independent clock unit in it, be used for control and output waveform frequency of operation;
Wave data memory module (2) is both-end parallel port RAM, is used for waveform, the phase information of buffer memory one-chip computer module (1) output;
Phaselocked loop scan module (3) includes phase-locked loop chip and CPLD chip, and it is synthetic to be used to control output waveform frequency and phase information;
Amplitude D/A converter module (4) is the one 16 a parallel port D/A converter, is used for converting the amplitude information of digital output waveform to the simulation output waveform signals;
Waveform D/A converter module (5), the 2 16 parallel port D/A converter is used for converting waveform, the phase information of digital output waveform to the simulation output waveform signals;
Waveform output operational amplifier (6) is used to amplify analog output signal;
Voltage reference module (7) is used for output reference voltage;
Communication interface modules (8) is used to receive and dispatch control signal;
Amplitude output amplifier module (9) is used to amplify analog output signal;
Described one-chip computer module (1) receives and feedback control signal through communication interface modules (8), the data port and the address mouth of the Wave data memory module (2) of the data of output waveform, address signal to described both-end parallel port; The inlet end data port of the amplitude signal of output waveform to described amplitude D/A converter module (4), the phase-locked loop chip of independent clock unit outputting standard clock signal to described phaselocked loop scan module (3);
The REF mouth of described amplitude D/A converter module (4) is imported reference voltage, output amplitude signal to the amplitude output amplifier module (9) of described voltage reference module (7) output;
The endpiece address mouth of the CPLD chip OPADD sweep signal of described phaselocked loop scan module (3) to described Wave data memory module (2);
The endpiece data output of described Wave data memory module (2) exports the data port of described waveform D/A converter module (5) to; The output of the REF mouth input amplitude output amplifier module (9) of described waveform D/A converter module (5), the output waveform signals of described waveform output operational amplifier (6) incoming wave figurate number mould modular converter (5), last output frequency division dynamic waveform.
2. the electric power source signal that the frequency division dynamic waveform is provided according to claim 1 is characterized in that: also comprise the digital regulation resistance (10) that is used for the output index waveform signal and the totalizer (11) of be used to superpose sine wave signal and exponential waveform signal; Described digital regulation resistance (10) is connected between the output terminal and Voltage Reference end (ground connection) of said amplitude output operational amplifier 9; The control end of digital regulation resistance (10) is connected to the corresponding port of said one-chip computer module; The output terminal of the center tap of digital regulation resistance and said waveform output operational amplifier (6) is connected to the in-phase input end of totalizer respectively through first resistance and second resistance, the output terminal of totalizer (11) is the waveform output terminal of electric power source signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110349767.1A CN102507994B (en) | 2011-11-08 | 2011-11-08 | Power signal source capable of providing frequency division dynamic waveforms |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110349767.1A CN102507994B (en) | 2011-11-08 | 2011-11-08 | Power signal source capable of providing frequency division dynamic waveforms |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102507994A true CN102507994A (en) | 2012-06-20 |
| CN102507994B CN102507994B (en) | 2014-01-22 |
Family
ID=46220100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110349767.1A Active CN102507994B (en) | 2011-11-08 | 2011-11-08 | Power signal source capable of providing frequency division dynamic waveforms |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102507994B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901849A (en) * | 2012-08-29 | 2013-01-30 | 中国石油大学(华东) | Distorted power grid signal simulating device |
| CN102937019A (en) * | 2012-10-22 | 2013-02-20 | 西安石油大学 | Weak signal generation device |
| CN104345294A (en) * | 2014-11-04 | 2015-02-11 | 国家电网公司 | Electric energy meter dynamic performance test device |
| CN104391142A (en) * | 2014-12-22 | 2015-03-04 | 永新电子常熟有限公司 | Novel convenient signal generator |
| CN104569900A (en) * | 2013-10-14 | 2015-04-29 | 北京化工大学 | Dynamic error testing method and device for intelligent ammeter |
| CN107017795A (en) * | 2017-03-31 | 2017-08-04 | 德力西(杭州)变频器有限公司 | Pulse-generator circuit and its control method |
| CN113359550A (en) * | 2021-06-03 | 2021-09-07 | 广州地铁集团有限公司 | FSK data monitoring equipment based on FPGA |
| CN116400290A (en) * | 2023-03-23 | 2023-07-07 | 中国电力科学研究院有限公司 | Harmonic signal source generating circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6043642A (en) * | 1996-08-01 | 2000-03-28 | Siemens Power Transmission & Distribution, Inc. | Watt-hour meter with communication on diagnostic error detection |
| CN1564000A (en) * | 2004-04-19 | 2005-01-12 | 张玘 | Digital signal source with waveform indication |
| CN1831541A (en) * | 2006-04-14 | 2006-09-13 | 北京航空航天大学 | Multichannel synchronous sinusoidal signal generator |
| CN202433419U (en) * | 2011-11-08 | 2012-09-12 | 广东电网公司电力科学研究院 | Electric power signal source capable of providing frequency division dynamic waveform |
-
2011
- 2011-11-08 CN CN201110349767.1A patent/CN102507994B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6043642A (en) * | 1996-08-01 | 2000-03-28 | Siemens Power Transmission & Distribution, Inc. | Watt-hour meter with communication on diagnostic error detection |
| CN1564000A (en) * | 2004-04-19 | 2005-01-12 | 张玘 | Digital signal source with waveform indication |
| CN1831541A (en) * | 2006-04-14 | 2006-09-13 | 北京航空航天大学 | Multichannel synchronous sinusoidal signal generator |
| CN202433419U (en) * | 2011-11-08 | 2012-09-12 | 广东电网公司电力科学研究院 | Electric power signal source capable of providing frequency division dynamic waveform |
Non-Patent Citations (3)
| Title |
|---|
| W ZHAO ET AL.: "Injection-type hybrid active power filter in high-power grid with background harmonic voltage", 《THE INSTITUTION OF ENGINEERING AND TECHNOLOGY》, vol. 4, no. 1, 28 February 2011 (2011-02-28), pages 63 - 71, XP006037467, DOI: doi:10.1049/IET-PEL:20090313 * |
| 王春玲等: "可变频标准信号源的VHDL设计", 《泰山学院院报》, vol. 30, no. 6, 30 November 2008 (2008-11-30), pages 79 - 82 * |
| 赵伟等: "分频控制方法在中高压系统HAPF中的应用", 《湖南大学学报（自然科学版）》, vol. 36, no. 3, 31 March 2009 (2009-03-31), pages 26 - 30 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901849A (en) * | 2012-08-29 | 2013-01-30 | 中国石油大学(华东) | Distorted power grid signal simulating device |
| CN102937019A (en) * | 2012-10-22 | 2013-02-20 | 西安石油大学 | Weak signal generation device |
| CN104569900A (en) * | 2013-10-14 | 2015-04-29 | 北京化工大学 | Dynamic error testing method and device for intelligent ammeter |
| CN104569900B (en) * | 2013-10-14 | 2017-12-12 | 北京化工大学 | Intelligent electric energy meter dynamic error test device |
| CN104345294B (en) * | 2014-11-04 | 2017-09-29 | 国家电网公司 | A kind of electric energy meter dynamic performance and testing |
| CN104345294A (en) * | 2014-11-04 | 2015-02-11 | 国家电网公司 | Electric energy meter dynamic performance test device |
| CN104391142A (en) * | 2014-12-22 | 2015-03-04 | 永新电子常熟有限公司 | Novel convenient signal generator |
| CN107017795A (en) * | 2017-03-31 | 2017-08-04 | 德力西(杭州)变频器有限公司 | Pulse-generator circuit and its control method |
| CN107017795B (en) * | 2017-03-31 | 2019-04-30 | 德力西(杭州)变频器有限公司 | Pulse-generator circuit and its control method |
| CN113359550A (en) * | 2021-06-03 | 2021-09-07 | 广州地铁集团有限公司 | FSK data monitoring equipment based on FPGA |
| CN113359550B (en) * | 2021-06-03 | 2023-08-29 | 广州地铁集团有限公司 | FSK data monitoring equipment based on FPGA |
| CN116400290A (en) * | 2023-03-23 | 2023-07-07 | 中国电力科学研究院有限公司 | Harmonic signal source generating circuit |
| CN116400290B (en) * | 2023-03-23 | 2024-03-19 | 中国电力科学研究院有限公司 | Harmonic signal source generating circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102507994B (en) | 2014-01-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102507994B (en) | Power signal source capable of providing frequency division dynamic waveforms | |
| CN102353836B (en) | Method for dynamically adjusting current channel gain of wide-range electric energy meter | |
| CN102053202B (en) | Smart grid-oriented power quality monitoring system and method | |
| CN204758716U (en) | Dc -to -ac converter is at ring testing arrangement | |
| CN203519678U (en) | High-precision three-phrase AC simulation source having zero passage synchronization PPS output | |
| CN104852566A (en) | H-bridge cascade type STATCOM control system based on model prediction | |
| CN103219733A (en) | Scattered power generation reactive compensation device and method with harmonic suppression function | |
| CN202433419U (en) | Electric power signal source capable of providing frequency division dynamic waveform | |
| CN108051664A (en) | A kind of equipment for monitoring power quality | |
| CN103178782A (en) | Frequency sweeping signal generator | |
| CN202075343U (en) | Three phase electric energy meter and three phase electric energy correction system | |
| CN100568688C (en) | Small-power is single-phase/phase/three phase low distortion frequency conversion power source | |
| CN203405695U (en) | Voltage controlled current signal generator of solar battery array simulator | |
| CN103515958A (en) | Power quality equipment and control device thereof | |
| CN203720323U (en) | Portable three-phase asynchronous motor operational parameter tester | |
| CN103033682B (en) | High-precision three-phase power meter and metering method thereof | |
| CN202772870U (en) | Arbitrary waveform signal source device based on SOPC | |
| CN102608423A (en) | Detection method of harmonic energy | |
| CN202403774U (en) | Multiphase flow simulated experiment signal generation device | |
| CN202486308U (en) | Harmonic electric quantity measuring system | |
| CN201255768Y (en) | Three phase harmonic standard electrical energy meter | |
| CN205229381U (en) | Portable electric wire netting loss monitoring system | |
| CN114545068A (en) | Portable 10kV three-phase broadband power standard equipment | |
| CN203826969U (en) | Chained SVG control circuit based on DSP and FPGA | |
| CN206930688U (en) | A kind of dynamic distortion power source based on high speed DMA fitting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 510080 Dongfeng East Road, Dongfeng, Guangdong, Guangzhou, Zhejiang Province, No. 8 Patentee after: Electric Power Research Institute of Guangdong Power Grid Co.,Ltd. Address before: Guangzhou City, Guangdong province Yuexiu District 510080 Dongfeng East Road, No. 8 building water Kong Guangdong Patentee before: ELECTRIC POWER RESEARCH INSTITUTE OF GUANGDONG POWER GRID Corp. |
|
| CP03 | Change of name, title or address |