CN205643513U - System for accurate unbalanced three phase output frequence that detects - Google Patents
System for accurate unbalanced three phase output frequence that detects Download PDFInfo
- Publication number
- CN205643513U CN205643513U CN201620159767.3U CN201620159767U CN205643513U CN 205643513 U CN205643513 U CN 205643513U CN 201620159767 U CN201620159767 U CN 201620159767U CN 205643513 U CN205643513 U CN 205643513U
- Authority
- CN
- China
- Prior art keywords
- data
- incoming
- coordinate
- phase
- coordinate converter
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model relates to a system for accurate unbalanced three phase output frequence that detects, its system be by three -phase voltage sample device, 3 do 2 transformation of coordinates ware, CPU device include reduced order resonance and second order improper integral, proportional controller, 2 the 2 transformation of coordinates ware, the PI controller, the adder, the multiplier, surplus ware is got to the integrator, and oscilloscope constitutes. After these system sample data, carry out transformation of coordinates, again the positive component in the CPU device draw with the process of secondary separation, the data that reach are handled through the PI controller after carrying out transformation of coordinates again, can accurately reach the frequency of output after simple operation is carried out to the data handled out at last. The utility model discloses an add reduced order resonance and second order improper integral, make its frequency that can accurate detect out output under the unbalanced three phase state.
Description
Technical field
This utility model relates to the system of a kind of accurate detection three-phase imbalance output frequency, specifically a kind of modified model phaselocked loop.
Background technology
In recent years, based on environmental conservation, energy-saving and emission-reduction and the requirement of sustainable development and with dispersibility, reliability, high usage is developing rapidly of the Distributed Power Generation of main feature, micro-capacitance sensor causes society and pays close attention to widely, wherein, multiple stage often applies in real life without the micro-capacitance sensor parallel system of interconnection line, therefore, in order to prevent multiple stage micro-capacitance sensor from during load end is transmitted electricity, circulation state occurring, the necessary moment is quick, measure the phase place of micro-capacitance sensor output end voltage accurately, and phase place is according to frequency, the i.e. moment accurately measures frequency and can effectively suppress circulation.But, when unbalanced state occurs in micro-capacitance sensor output three-phase voltage, conventional phase locked loops is easily affected by harmonic wave, causes output frequency fluctuation status occur, so that phase-detection is inaccurate, and then affects micro-capacitance sensor power supply quality.
Utility model content
This utility model purpose is to provide the system of a kind of accurate detection three-phase imbalance output frequency, can improve the weak point in above-mentioned background technology.
In order to achieve the above object, technical solution adopted in the utility model is: the system of a kind of accurate detection three-phase imbalance output frequency, it is characterised in that including: three-phase voltage sampling apparatus, 3-2 coordinate converter, CPU device includes depression of order resonance and is abbreviated as ROR and second order improper integral is abbreviated as SOGI, proportional controller, 2-2 coordinate converter, PI controller, adder, multiplier, integrator, remainder device, oscillograph.
Three-phase voltage sampling apparatus is characterized in that: uses Hall voltage sensor, and in the data incoming 3-2 coordinate converter after sampling.
3-2 coordinate converter is characterized in that: uses Isometric coordinate to convert from three-phase static coordinate system to biphase static vertical coordinate system, i.e. ua, ub, ucIt is transformed to uα, uβ, sampled data is after it converts in incoming CPU device.
CPU device includes depression of order resonance and second order improper integral is characterized in that: process from the data of 3-2 coordinate converter and in the data incoming 2-2 coordinate converter after process.
Proportional controller is characterized in that: processes input data values respectively in depression of order resonance and second order improper integral.
2-2 coordinate converter is characterized in that: uses Isometric coordinate conversion to be tied to biphase synchronous rotating frame, i.e. u from biphase static vertical coordinateα, uβIt is transformed to ud, uq, process from the data of CPU device and in the data incoming PI controller after conversion.
PI controller is characterized in that: processes from the data of 2-2 coordinate converter and in the incoming adder of data after process.
Adder is characterized in that: processes from the data of PI controller and in the incoming integrator of data after process and multiplier.
Integrator is characterized in that: processes from the data of adder and in the data incoming remainder device after process.
Multiplier is characterized in that: processes from the data of adder and in the incoming oscillograph of data 1 after process.
Remainder device is characterized in that: processes from the data of integrator and in the incoming oscillograph of data 2 after process.
Oscillograph 1 is characterized in that: shows the data from multiplier.
Oscillograph 2 is characterized in that: shows the data from remainder device.
The beneficial effects of the utility model include:
Can accurately detect the frequency of output under three-phase imbalance state.
Accompanying drawing explanation
Fig. 1 is the system of a kind of accurate detection three-phase imbalance output frequency of this utility model.Wherein, 1 three-phase voltage sampling apparatus, 23-2 coordinate converter, 3CPU device include ROR and SOGI, 42-2 coordinate converter, 5PI controller, 6 adders, 7 integrators, 8 multipliers, 9 remainder devices, 10 oscillograph 1,11 oscillographs 2.
Fig. 2 is ROR structured flowchart in this utility model CPU device.
Fig. 3 is SOGI structured flowchart in this utility model CPU device.
Fig. 4 is the connection figure of ROR Yu SOGI in this utility model CPU device.
Detailed description of the invention
For the technological means making this utility model realize, creation characteristic, reaching purpose and be easy to understand with effect, below in conjunction with Fig. 1, Fig. 2, Fig. 3, Fig. 4 are expanded on further this utility model.
Detailed description of the invention is as follows:
As it is shown in figure 1, three-phase voltage sampling apparatus is the three-phase voltage value incoming 3-2 coordinate converter obtained, by the voltage u after coordinate transformαAnd uβROR (shown in Fig. 4) in (shown in Fig. 2) incoming CPU device and carried out positive-sequence component by it and extract and the work (shown in Fig. 2) of harmonic carcellation interference, should during the u that drawsα +And uβ +Again through SOGI process (shown in Fig. 4), reach secondary separation and the purpose (shown in Fig. 3) of suppression harmonic wave, the u drawn during being somebody's turn to do( α / β ) + oAnd qu( α / β ) + oAgain through calculation process (shown in Fig. 4), finally draw uα *And uβ *Frequency identical with mains frequency, phase 90 °.Then, uα *And uβ *Incoming 2-2 coordinate converter, the voltage u obtained after coordinate transformqThe most incoming PI controller processes, the data after process and ωoCarry out additive operation (ωoIt is 2 π fo, foFor work frequency 50Hz), the data that this process draws and 1/2 π carry out multiplying, the frequency (shown in Fig. 1) of surveyed three-phase voltage can be found out from oscillograph 1, data are integrated computing and then can get the phase place of its correspondence, again with 2 π, phase place is carried out complementation then can the phase place of output be limited in [0～2 π], prevent from overflowing, from oscillograph 2, can be seen that the phase place (shown in Fig. 1) of output.
The above, for case study on implementation of the present utility model, all should contain at this utility model.
Claims (4)
1. the system of an accurate detection three-phase imbalance output frequency, it is characterized in that including: three-phase voltage sampling apparatus obtains extraneous three-phase voltage value and processing in incoming for data 3-2 coordinate converter, data process in the incoming CPU device including depression of order resonance and second order improper integral via after the conversion of 3-2 coordinate converter, data after conversion process via in 2-2 coordinate converter incoming after CPU device computing, data after computing process in incoming PI controller via after the conversion of 2-2 coordinate converter, and the data after process are via adder and ωoAfter computing, incoming integrator and multiplier process, calculation process is carried out with 2 π in data incoming remainder device after processing via integrator and by it, the incoming oscillograph of data 2 after calculation process shows, data in incoming multiplier are carried out calculation process by it with 1/2 π, show in the incoming oscillograph of data 1 after calculation process.
The system of a kind of accurate detection three-phase imbalance output frequency the most according to claim 1, it is characterised in that: described three-phase voltage sampling apparatus uses Hall voltage sensor.
The system of a kind of accurate detection three-phase imbalance output frequency the most according to claim 1, it is characterised in that: described 3-2 coordinate converter uses Isometric coordinate conversion from three-phase static coordinate system to biphase static vertical coordinate system.
The system of a kind of accurate detection three-phase imbalance output frequency the most according to claim 1, it is characterised in that: described 2-2 coordinate converter uses Isometric coordinate conversion to be tied to biphase synchronous rotating frame from biphase static vertical coordinate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620159767.3U CN205643513U (en) | 2016-03-02 | 2016-03-02 | System for accurate unbalanced three phase output frequence that detects |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620159767.3U CN205643513U (en) | 2016-03-02 | 2016-03-02 | System for accurate unbalanced three phase output frequence that detects |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205643513U true CN205643513U (en) | 2016-10-12 |
Family
ID=57076934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620159767.3U Expired - Fee Related CN205643513U (en) | 2016-03-02 | 2016-03-02 | System for accurate unbalanced three phase output frequence that detects |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205643513U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106953342A (en) * | 2017-04-12 | 2017-07-14 | 上海电力学院 | Fundamental voltage positive-negative sequence separation method when unbalanced source voltage and harmonic distortion |
| CN107271772A (en) * | 2017-06-12 | 2017-10-20 | 南京工程学院 | A kind of mains frequency quick determination method of high accuracy and anti-noise jamming |
| CN107748289A (en) * | 2017-11-28 | 2018-03-02 | 嘉兴伏尔电子科技有限公司 | A kind of follow-on inverter phase detectors |
-
2016
- 2016-03-02 CN CN201620159767.3U patent/CN205643513U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106953342A (en) * | 2017-04-12 | 2017-07-14 | 上海电力学院 | Fundamental voltage positive-negative sequence separation method when unbalanced source voltage and harmonic distortion |
| CN107271772A (en) * | 2017-06-12 | 2017-10-20 | 南京工程学院 | A kind of mains frequency quick determination method of high accuracy and anti-noise jamming |
| CN107271772B (en) * | 2017-06-12 | 2019-06-25 | 南京工程学院 | A kind of mains frequency rapid detection method of high-precision and anti-noise jamming |
| CN107748289A (en) * | 2017-11-28 | 2018-03-02 | 嘉兴伏尔电子科技有限公司 | A kind of follow-on inverter phase detectors |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101893651B (en) | Method for detecting positive sequence, negative sequence, idle and harmonic currents of power supply system | |
| CN205643513U (en) | System for accurate unbalanced three phase output frequence that detects | |
| CN107632200B (en) | Harmonic detection method based on discrete Fourier transform | |
| CN108155643B (en) | A kind of robust estimation method of the single-phase mains voltage parameter based on sliding mode observer | |
| CN102981049B (en) | Frequency detection method used for microgrid system | |
| CN104833853B (en) | A kind of adaptive sliding window DFT harmonic detecting methods of frequency | |
| CN102565523A (en) | Current harmonic detection system and working method | |
| WO2017113754A1 (en) | Method for detecting dynamic reactive power of grid and reactive power detector | |
| CN107271774A (en) | A kind of APF harmonic detecting methods based on spectrum leakage correcting algorithm | |
| CN103575987B (en) | Based on DSP m-Acetyl chlorophosphonazo detecting instrument and detection method thereof | |
| CN114564821A (en) | Grid-connected inverter impedance modeling method based on single-phase disturbance injection | |
| CN201859177U (en) | Measurement module for low-frequency alternating current signal in relay protection device | |
| CN108414838A (en) | A kind of inverter parallel system line impedance measurement method | |
| CN103149436B (en) | The m-Acetyl chlorophosphonazo detection system of three-phase active power distribution network | |
| CN104143837A (en) | Alternating-voltage-sensor-free control method for inverter with parameter adaptive characteristic | |
| CN107659016B (en) | The fast separating process of induction electromotor rotor electromagnetic quantities based on spacetime symmetry | |
| CN102778605B (en) | Method and device for carrying out online determination on given and appended electric quantity of three-phase four-wire system in process of one-phase current losing | |
| CN102768301B (en) | Method and device for on-line determining withdrawal and compensation electric quantity in three-phase four-wire two-phase current loss | |
| CN110266036B (en) | Dimension reduction method for multi-dimensional frequency domain impedance of current transformer | |
| CN202066925U (en) | Harmonic monitor of electric network | |
| CN106487039A (en) | A kind of Phase Lock Technique suitable for network deformation | |
| CN102916428A (en) | Direct power control method of active-filtering and reactive power-compensating device | |
| CN103364634B (en) | Three-phase alternating-current supply frequency measurement method | |
| CN106787650B (en) | The Direct Current that active secondary pulsation inhibits under unbalanced power supply instructs calculation method | |
| CN103973151A (en) | Decoupling control method for three-phase pulse width modulation (PWM) grid-connected inverter under inductance imbalanc condition |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161012 Termination date: 20170302 |