CN207007902U - A kind of program controled power source of intelligent grid digitizer qualification - Google Patents
A kind of program controled power source of intelligent grid digitizer qualification Download PDFInfo
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- CN207007902U CN207007902U CN201720238394.3U CN201720238394U CN207007902U CN 207007902 U CN207007902 U CN 207007902U CN 201720238394 U CN201720238394 U CN 201720238394U CN 207007902 U CN207007902 U CN 207007902U
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Abstract
The utility model discloses a kind of program controled power source of intelligent grid digitizer qualification, including primary winding, rogowski coil mutual inductances device, iron-core coil transformer, digital integrator and mutual inductance self-correcting instrument, it is characterised in that：Described rogowski coil mutual inductances device and iron-core coil transformer are arranged on primary winding；The signal sampling device output end of rogowski coil mutual inductance devices is connected by digital integrator with mutual inductance self-correcting instrument；The signal sampling device output end of iron-core coil transformer is connected with mutual inductance self-correcting instrument; wherein adaptive power supply application improves high-power amplifier operating efficiency; while reducing power amplifier heating; Self-Protection Subsystem is intelligently overheated by power amplifier; effectively increase the reliability and service life of program controled power source; there is standardization, intellectuality, high reliability, high-performance, meet a variety of demands of intelligent grid correlated digital equipment performance verification.
Description
Technical field
The utility model belongs to intelligent grid equipment dependability testing field, is for intelligent grid correlated digital equipment
Various three-phase voltages, the high reliability of current power signal or other test desired signals, Gao Xing required for providing can be provided
Can program controled power source.
Background technology
2012, national smart grid construction was had gone up as national strategy, in the great scientific and technological industrialization engineering of intelligent grid
Under " 12 " ad hoc planning promotes, China has completed the construction of thousands of digital intelligent transformer stations at present.At the same time,
Digitizer starts large-scale application, and the mode of electric energy metrical is also changed into modernization from traditional analog signal metering
Digitalized electric energy metering based on IEC61850 digital communication protocols.With the popularization of digital intelligent Substation Automation System
And engineering construction, digitizer is also more and more extensive in the application of transformer station, to the function and performance requirement of digitizer
More and more higher.
At present, the digital electric energy metrical structure based on digitizer gradually starts to substitute traditional electric energy metrical pattern,
But research of the people to the hardware composition of digitizer, functional module, data transfer and data processing method is deep not enough.
Some pilot projects therein do not have the own characteristic and practical operation situation for taking into full account digitizer, and digitlization is set
Standby metering performance test is not comprehensive enough, causes digitizer still to run into more metering relevant issues in operation.
At present, need badly and carry out digitizer metering performance appraisement system key technology research, and program controled power source can be with
Various three-phase voltages, current power signal or other surveys required for being provided for the verification of intelligent grid correlated digital equipment performance
Desired signal is tried, it has the characteristics that standardization, intellectuality, high reliability, high-performance, meets that digitizer metering performance is surveyed
A variety of demands of examination.Program controled power source ensure that the test of digitizer metering performance provides indispensable signal source and promotes related close
Research on Key can fast and accurately be implemented, and the development of practical application and intelligent grid to digital electric energy metrical has important
Meaning.
Utility model content
For the disadvantages described above or Improvement requirement of prior art, the utility model is provided as intelligent grid correlated digital and set
Standby qualification provides the program control power of required various three-phase voltages, current power signal or other test desired signals
Source, especially proposes Rogowski coil and iron-core coil measurement in a closed series unit and the raising of fuzzy feedback control algorithm is defeated
Go out the high efficiency power amplifier design of signal stabilization and accuracy and adaptive power supply and based on more physical parameter models
Overheat Self-Protection Subsystem etc. is designed to ensure the reliability and service life of intelligentized raising utility model.
To achieve the above object, the utility model provides following scheme：
A kind of program controled power source of intelligent grid digitizer qualification, including primary winding, rogowski coils
Transformer, iron-core coil transformer, digital integrator and mutual inductance self-correcting instrument, described rogowski coil mutual inductances device and iron
Core coil transformer is arranged on primary winding；The signal sampling device output end of rogowski coil mutual inductance devices is by numeral product
Device is divided to be connected with mutual inductance self-correcting instrument；The signal sampling device output end of iron-core coil transformer connects with mutual inductance self-correcting instrument
Connect.
Described digital integrator is integrated attenuation and the digital integrator for exporting DC-isolation.
Using the technical solution of the utility model, high-precision Rogowski coil current transformer senses as normalized current
Device, accurate noninductive resistance partial pressure gather program controled power source output waveform as normal voltage sensor；Voltage, the electric current letter of detection
Number feed back to Fuzzy PID Control System simultaneously with normalized current, voltage signal, form closed loop feedback control, make output more smart
Really and stably；Electric current, the voltage signal of closed loop feedback control output export analog signal through high-precision D/A cards；Analog signal passes through
Power amplifier amplification produces A, B, C three-phase voltage, current power signal.
Compared with the prior art, it is the characteristics of the utility model：
This power source uses high-precision Rogowski coil（Rogowski coil and iron-core coil measurement in a closed series unit）Electricity
Current transformer is as normalized current sensor
This power source can reach 0.1% measurement accuracy, frequency band and sound using precision resistance partial pressure as normal voltage sensor
Should it meet the requirements；
The software output control module of installation uses high-precision D/A cards and mould inside the power signal generator of this power source
Paste PID control system and form closed loop feedback control, make output more accurately and stably.
Overheat protecting system intelligence of this power source with adaptive power supply power amplifier and based on more physical parameter models
Change improves service life and performance.
Brief description of the drawings
Fig. 1 show the utility model principle block diagram；
Fig. 2 show the high precision current transformer principle based on Rogowski coil and iron-core coil in the utility model
Figure.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
As shown in Figure 1-2, the purpose of this utility model is to provide a kind of journey of intelligent grid digitizer qualification
Control power source, including primary winding, rogowski coil mutual inductances device, iron-core coil transformer, digital integrator and mutual inductance
Self-correcting instrument, described rogowski coil mutual inductances device and iron-core coil transformer are arranged on primary winding；Rogowski coils
The signal sampling device output end of transformer is connected by digital integrator with mutual inductance self-correcting instrument；Iron-core coil transformer
Signal sampling device output end is connected with mutual inductance self-correcting instrument.
Described digital integrator is integrated attenuation and the digital integrator for exporting DC-isolation.
During experiment, the utility model is carried out so that program controled power source exports corresponding three-phase current, voltage power signals as an example
The explanation of embodiment.Specific implementation step is as follows：
As shown in figure 1, the utility model, which is based on LabVIEW Virtual Instrument Developments, may be programmed program controled power source software, produce
Three-phase voltage, current waveform signal or random waveform signal, analog signal is exported using high-precision D/A cards, produced through power amplification
Raw A, B, C three-phase voltage, current power signal.High-precision Rogowski coil current transformer is designed to sense as normalized current
Device, accurate noninductive resistance partial pressure gather power waveform generator output waveform as normal voltage sensor, and use fuzzy
Closed loop feedback regulation output, ensure the Stability and veracity of power signal output.High-precision Rogowski coil Current Mutual Inductance
Device integrates with new digital integral algorithm to the output of PCB design Rogowski coil, to reduce tested current signal ripple
Shape, improve Rogowski coil Accuracy Class of Current Transformer and stability.Because Rogowski coil is easily by a wire position
Influence is put, long-time stability are poor, design under low frequency, with iron-core coil transformer to Rogowski coil current transformer
Mutual inductance is corrected.Rogowski coil Accuracy Class of Current Transformer is further improved by automatic correcting method, as mark
Quasi- sensor is used to measure electric current output.Voltage, the current signal of detection also feed back to the output control of power signal generator software
Molding block, closed loop feedback control is formed, make output more accurately and stably.
Because Rogowski coil is easily influenceed by a lead location, long-time stability are poor, design under low frequency, use
Iron-core coil transformer is corrected to the mutual inductance of Rogowski coil current transformer.It is further by automatic correcting method
Rogowski coil Accuracy Class of Current Transformer is improved, is used to measure electric current output as standard transducer.Its key feature is such as
Shown in Fig. 2, using the degree of accuracy of iron-core coil it is high, do not influenceed by conductor position the advantages of, in 50Hz electric currents, use iron-core coil
Output as standard, and the mutual inductance error of Rogowski coil is analyzed, if error is excessive, in time to Rogowski coil
Mutual inductance calibrated.After Rogowski coil is calibrated, using Rogowski coil as standard current transformer,
For measuring the current signal in broad frequency range.
Voltage, the current signal of detection also feed back to power signal generator software output control module, and it is anti-to form closed loop
Feedback control, make output more accurately and stably.What wherein standard current signal sampling was used is to be based on Rogowski coil mutual inductance
The normalized current sampling unit of coefficient calibration, what normal voltage sampling was used is precision resistance partial pressure.Input as digital quantity, warp
PCI6733 high accuracy D/A card output signals, then exported after high-power voltage amplifier and the amplification of high-power electric current amplifier.
PCI4472 high-precision As/D cards collection output signal, improve Al-Alaoui arithmetic of digital integral for defeated to Rogowski coil
Go out and carry out digital integration, reduction current waveform.Iron-core coil signal sampling and the sampling of measuring resistance divider are then sent directly into mould
Paste PID controller.Whole control system realizes full-digital control, fuzzy-adaptation PID control and Detection task, Rogowski numerals
Integral algorithm is completed by software, and is provided with fault alarm and defencive function.System hardware circuit is simple, and cost is low, can
By property height.
As shown in figure 1, after signal synthesizes, current signal and voltage signal are enlarged into by power amplifier.Wherein,
Current signal amplifies using high current linear amplifier PA12A power amplifiers, and output rated value is 5A or 1A, output current scope
For ± 9A；Voltage signal amplifies using high voltage linear amplifier PA91 power amplifiers, and output rated value is 100V or 57.7V,
Output voltage range is ± 180V.In program controled power source design, stability, the reliability of current amplification and voltage power amplifier, directly
It is related to the performance of program controled power source.Therefore, using the high efficiency power amplifier with adaptive power supply and based on more physical parameters
The overheat protecting system of model ensures the safe and stable operation of power discharging device.
High efficiency power amplifier with adaptive power supply uses LabVIEW software-driven D/A card CH0 passage output voltage sources
Power amplifier power supply control signal US-u, CH1, CH2, CH3 passage output three-phase voltage waveform uA (t), uB (t), uC (t), CH4
Passage output current source power amplifier power supply control signal US-i, CH5, CH6, CH7 passage three-phase current waveform iA (t), iB
(t), iC (t), meanwhile, out-put supply control signal（US-u、US-i）.
By taking three-phase voltage source as an example, when output voltage amplitude is smaller, D/A cards export the power supply signal of low amplitude value simultaneously
US-u, when output voltage amplitude is larger, D/A cards export the power supply signal of amplitude simultaneously.
The operation principle of program controled power source is carried out analyzing the hair that can obtain voltage source use and current source power amplifier
Thermal model.
With environment temperature（It can be measured by temperature sensor）For initial temperature, with reference to multichannel power-type AWG
Run time by above-mentioned two formula be iterated calculate can calculate voltage source use and current source power amplifier reality
When temperature value.The real time temperature of software automatic decision power amplifier, corresponding overtemperature protection is carried out if more than protection temperature
Strategy.
Compared with the prior art, it is the characteristics of the utility model：
This power source uses high-precision Rogowski coil（Rogowski coil and iron-core coil measurement in a closed series unit）Electricity
Current transformer is as normalized current sensor
This power source can reach 0.1% measurement accuracy, frequency band and sound using precision resistance partial pressure as normal voltage sensor
Should it meet the requirements；
The software output control module of installation uses high-precision D/A cards and mould inside the power signal generator of this power source
Paste PID control system and form closed loop feedback control, make output more accurately and stably.
Overheat protecting system intelligence of this power source with adaptive power supply power amplifier and based on more physical parameter models
Change improves service life and performance.
Described above is only the embodiment of the utility model program controled power source, those skilled in the art is managed
The utility model is solved or realized, intelligent grid IEC61850 agreement numbers can be used as by the use of the utility model according to claims
The power source of word equipment dependence test, a variety of modifications carried out for this civilized example are aobvious to those skilled in the art
And be clear to, method and principle can not depart from the situation of spirit or scope of the present utility model used by the utility model
Under, realized in other examples.Therefore, the utility model will not be restricted to case study on implementation shown in this article, but accord with
Close the widest range consistent with principles disclosed herein and features of novelty.
Claims (2)
1. a kind of program controled power source of intelligent grid digitizer qualification, including primary winding, rogowski coils are mutual
Sensor, iron-core coil transformer, digital integrator and mutual inductance self-correcting instrument, it is characterised in that：Described rogowski coils
Transformer and iron-core coil transformer are arranged on primary winding；The signal sampling device output end of rogowski coil mutual inductance devices
It is connected by digital integrator with mutual inductance self-correcting instrument；The signal sampling device output end of iron-core coil transformer and mutual inductance system
Number self-correcting instrument connection.
2. a kind of program controled power source of intelligent grid digitizer qualification according to claim 1, its feature exist
In：Described digital integrator is integrated attenuation and the digital integrator for exporting DC-isolation.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108802445A (en) * | 2017-03-13 | 2018-11-13 | 贵州电网有限责任公司电力科学研究院 | A kind of program controled power source and method of intelligent grid digitizer qualification |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108802445A (en) * | 2017-03-13 | 2018-11-13 | 贵州电网有限责任公司电力科学研究院 | A kind of program controled power source and method of intelligent grid digitizer qualification |
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