CN107045082A - The synchronized phase open loop detection method of high accuracy and anti-noise jamming - Google Patents
The synchronized phase open loop detection method of high accuracy and anti-noise jamming Download PDFInfo
- Publication number
- CN107045082A CN107045082A CN201710437036.XA CN201710437036A CN107045082A CN 107045082 A CN107045082 A CN 107045082A CN 201710437036 A CN201710437036 A CN 201710437036A CN 107045082 A CN107045082 A CN 107045082A
- Authority
- CN
- China
- Prior art keywords
- phase
- synchronized
- voltage signal
- noise
- open loop
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a kind of high accuracy and the synchronized phase open loop detection method of anti-noise jamming, by three-phase power grid voltageU a、U b、U cSynchronized rotating coordinate transformation matrixT(ω s t) it is transformed to the voltage signal under two-phase rotating coordinate systemU d、U q, obtained by calculatingU d、U qAndθ exSelection rule, real-time amplitude, the phase of power network are calculated according to grid voltage amplitude disclosed by the invention, phase formula.If desired consider the influence of noise signal, low pass filter (LPF) can be increased after synchronous rotating angle module；If desired the interference of specified rd harmonic signal is filtered out, then can increase MAF or DSC module carries out harmonics restraint；If desired the influence of any rd harmonic signal is considered, then directly using the MAF that sliding step is power frequency period.The present invention is effectively improved the real-time detectability of synchronized phase, and measurement accuracy is high, fast response time, and good in anti-interference performance, robustness is stronger, with good application value.
Description
Technical field：
The invention belongs to synchronized phase detection techniques field, the power network of more particularly to a kind of high accuracy and anti-noise jamming is same
Walk phase open loop detection method.
Background technology：
The locking phase for rapidly and accurately obtaining power network is the basic demand of grid type power electronic equipment safe and stable operation,
It is the key technology for realizing the control of high-performance current transformer.Existing synchronized method for detecting phases can be roughly divided into two classes：Close
Ring detection method and open loop detecting method.
Closed loop phase detection, also referred to as soft phase-locked loop (software phase-locked loop, SPLL).Typically
SPLL mainly has 3 kinds：Single synchronous coordinate system SPLL (single synchronous reference frame SPLL, SSRF-
SPLL), the SSRF-SPLL based on symmetrical component method, decoupling SPLL (the decoupled double based on double synchronous coordinate systems
SRF-SPLL, DDSRF- SPLL).Wherein, amplitude, frequency and phase when SSRF-SPLL can be effectively applied to grid balance
Position detection, its dynamic, steady-state response performance are preferable.But, when unbalanced power supply, the phase of SSRF-SPLL outputs is present
2 subharmonic, therefore steady-state behaviour is bad.Improve SSRF-SPLL and positive sequence voltage component is separated using symmetrical component method, and
The phase of unbalance voltage can be obtained by being sent to after closed-loop regulator.However, the method use the complete of preset parameter
Bandpass filter, when power network occurrence frequency drifts about, the accuracy for locking phase is poor.DDSRF-SPLL is then employed based on positive and negative sequence
Double synchronous coordinate architectures, realize the decoupling of positive-negative sequence, efficiently solve the problems, such as lock phase during asymmetrical three-phase.However,
The coupling between use and pi regulator and 4 low pass filters due to double synchronous coordinate architectures so that this method
Dynamic process it is sufficiently complex, its longer response time can not meet the requirement that high-performance locks relatively rapid property.In addition, SPLL
Loop filter nearly all employ pi regulator, therefore its dynamic response time depends mainly on the characteristic of adjuster.When
When power grid environment is more severe, regulator parameter is difficult to optimize design, and the dynamic process of adjuster is time-consuming longer, existing
SPLL response time is nearly all more than 1 power frequency period, it is impossible to meet the requirement for quick and precisely locking phase.Eliminate closed loop regulation
Process is then remarkably improved the speed of phase-detection, and this is the starting point that phase is surveyed in open loop.
Zero passage Phase Demodulation is the most frequently used open loop phase detection method at present, is usually used in power grid environment preferably and control accuracy
Not high occasion, its defect is can not to obtain the real-time phase of voltage fundamental positive-sequence component, and other open loop phase locking techniques are directed to mostly
Certain specific grid conditions designs wave filter, to realize that open loop locks phase, for example：Weighted least square method, base
Phase detectors converted in LPF etc..Obviously, above-mentioned open loop phase-lock technique can not tackle various possible power networks simultaneously
It is abnormal, the problems such as also having algorithm complexity in addition, be difficult to realize in embeded processor.Above-mentioned several method is all present
Deficiency, preferable synchronized phase detection techniques should meet accuracy, rapidity, noise immunity requirement simultaneously, in addition
Detection method should also be simple and easy to apply, in order to be realized in embedded controller.
The content of the invention：
, should it is an object of the invention to provide a kind of high accuracy and the synchronized phase open loop detection method of anti-noise jamming
Method need not carry out closed-loop dynamic regulation, therefore without cumbersome and complicated control system parameter designing.
The technical solution adopted in the present invention carries out as follows：A kind of high accuracy and synchronized phase of anti-noise jamming is fast
Fast open loop detecting method, including three-phase power grid voltage signalU a、U b、U cTwo-phase rotation seat is obtained after synchronized rotating coordinate transformation
Under mark systemU d 、U q , it is based onU d 、U q And additional angleθ exSelection rule, you can according to amplitude disclosed by the invention, phase formula
Calculate real-time amplitude, the phase of line voltage.
General principle to synchronized phase open loop detection method is described in detail herein below.
Three-phase power grid voltage signal, synchronous rotating angle matrix difference in the present invention is as follows：
(1)
(2)
It can be obtained after the rotated coordinate transform of three-phase power grid voltageU d、U q：
(3)
Assuming that initial phaseθ∈ (0,2 π), then can obtain according to formula (3)：
(4)
Wherein,
(5)
Now the locking phase of line voltage is as follows：
(6)
Amplitude is：
(7)
Synchronized phase open loop detection method of the present invention, comprises the following steps：
（1）Pass through voltage sensor senses mains voltage signalU a、U b、U c；
（2）The mains voltage signal detected is synchronized into rotational coordinates by synchronous rotating angle module to become
Change, and synchronous rotating angle matrix isT abc/dq(ω s t), obtain the voltage under two-phase rotating coordinate systemU d 、U q；
Wherein,ω s=2πf s,ω sFor the synchronous angular frequency of line voltage,f sFor 50 Hz（North america is 60 Hz）, and；
（3）If there are high-frequency noise or harmonic components in the mains voltage signal collected, need in synchronously rotating reference frame
Increase filter module after conversion module, to eliminate the influence of noise, harmonic wave etc.；If having high frequency in mains voltage signal to make an uproar
Sound, then be filtered to the output signal in step (2), and should preferentially use the low pass filter (LPF) of high bandwidth；If power network
There are specific secondary harmonic components in voltage signal, then can increase DSC, MAF or other wave filters carry out Harmonics elimination；To same
When eliminate the influence of any subharmonic composition, then should directly use MAF that sliding step is power frequency period as filtration module, with
Obtain optimal filtering performance；
（4）Obtained according to step (3)U d、U q, select correct by Rule of judgmentθ ex, Rule of judgment is as follows：IfU d>0 andU q>
0, then takeθ ex=0；U d<0, then takeθ ex=π；IfU d>0 andU q<0, then takeθ ex=2π；
（5）The parameter obtained according to step (3), (4), with reference to amplitude proposed by the present invention, phase calculation formula
Obtain the real-time phase of power network；Wherein, amplitude calculation formula is：, phase calculation formula is：。
In addition, the simulation model by building synchronized phase open loop detection method, to this phase-detection side
Method carries out simulating, verifying, and simulation result also confirms the correctness and validity of the program simultaneously.Pass through above-mentioned technical proposal, sheet
That invents has the beneficial effect that：Compared with existing synchronized method for detecting phases, can quick and precisely and real-time online examine
The locking phase of power network is surveyed, the dry of grid voltage amplitude, phase, the mutation of frequency and noise can be tackled separately or together
Disturb, method is simple and easy to apply, without carrying out parameter testing, measurement accuracy height and anti-noise jamming ability according to specific application scenario
By force.
Brief description of the drawings：
The open loop detection method schematic diagram of the synchronized phase of Fig. 1 present invention；
The three-phase power grid voltage and its amplitude waveform of Noise in Fig. 2 present invention；
Simulation waveform comparison diagram when having noise in Fig. 3 present invention before and after grid phase mutation.
Embodiment：
The present invention is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is synchronized phase open loop detection principle diagram of the present invention, is mainly included：Middle mains voltage signalU a、U b、U cAcquisition module, synchronous rotating angle module, low-pass filtering module, additional angleθ exSelecting module and amplitude phase meter
Calculate module.
Fig. 2 is the three-phase power grid voltage waveform and amplitude waveform of Noise, and the initial magnitude of voltage is 1p.u., during 0.05s
Amplitude sports 1.5p.u..
Fig. 3 is the simulation waveform comparison diagram before and after grid phase mutation in the case where there is high-frequency noise, line voltage
Original frequency is 50Hz, and amplitude is 1 p.u., and initial phase is 0；During 0.05s, line voltage frequency discontinuity is 60Hz, and amplitude is dashed forward
It is changed into 1.5 p.u., initial phase sports π/6.
Three-phase power grid voltage signal, synchronous rotating angle matrix difference in the present invention is as follows：
(1)
(2)
It can be obtained after the rotated coordinate transform of three-phase power grid voltageU d、U q：
(3)
Assuming that initial phaseθ∈ (0,2 π), then can obtain according to formula (3)：
(4)
Wherein,
(5)
Now the locking phase of line voltage is as follows：
(6)
Amplitude is：
(7)
The synchronized phase open loop detection method of a kind of high accuracy of the present invention and anti-noise jamming, including it is as follows
Step：
（1）Pass through voltage sensor senses mains voltage signalU a、U b、U c；
（2）The mains voltage signal detected is synchronized into rotational coordinates by synchronous rotating angle module to become
Change, and synchronous rotating angle matrix isT abc/dq(ω s t), obtain the voltage under two-phase rotating coordinate systemU d 、U q；Wherein,ω s=2πf s,ω sFor the synchronous angular frequency of line voltage,f sFor 50 Hz（North america is 60 Hz）, and；
（3）If there are high-frequency noise or harmonic components in the mains voltage signal collected, need in synchronously rotating reference frame
Increase filter module after conversion module, to eliminate the influence of noise, harmonic wave etc.；If having high frequency in mains voltage signal to make an uproar
Sound, then be filtered to the output signal in step (2), and should preferentially use the low pass filter (LPF) of high bandwidth；If power network
There are specific secondary harmonic components in voltage signal, then can increase DSC, MAF or other wave filters carry out Harmonics elimination；To same
When eliminate the influence of any subharmonic composition, then should directly use MAF that sliding step is power frequency period as filtration module, with
Obtain optimal filtering performance；
（4）Obtained according to step (3)U d、U q, select correct by Rule of judgmentθ ex, Rule of judgment is as follows：IfU d>0 andU q>
0, then takeθ ex=0；U d<0, then takeθ ex=π；IfU d>0 andU q<0, then takeθ ex=2π；
（5）The parameter obtained according to step (3), (4), be with reference to amplitude proposed by the present invention, phase calculation formula
It can obtain the real-time phase of power network；Wherein, amplitude calculation formula is：, phase calculation formula is：。
Above content is to combine specific case further description made for the present invention, it is impossible to assert the present invention's
Embodiment is only limitted to this, for general technical staff of the technical field of the invention, is not departing from the present invention
On the premise of design, some simple deduction or replace can also be made, the right that the present invention is submitted should be all considered as belonging to
The scope of patent protection that claim is determined.
Claims (1)
1. the synchronized phase open loop detection method of a kind of high accuracy and anti-noise jamming, it is characterised in that：Including such as
Lower step：
（1）Pass through voltage sensor senses mains voltage signalU a、U b、U c；
（2）The mains voltage signal detected is synchronized into rotating coordinate transformation by synchronous rotating angle module,
And synchronous rotation transformation matrix isT abc/dq(ω s t), obtain voltage signal under two-phase rotating coordinate system i.e.U d 、U q；Its
In,ω s=2πf s,ω sFor the synchronous angular frequency of line voltage,f sFor 50 Hz（North america is 60 Hz）, and；
（3）If there are high-frequency noise or harmonic components in the mains voltage signal collected, need in synchronously rotating reference frame
Increase filter module after conversion module, to eliminate the influence of noise, harmonic wave etc.；If having high frequency in mains voltage signal to make an uproar
Sound, then be filtered to the output signal in step (2), and should preferentially use the low pass filter (LPF) of high bandwidth；If power network
There are specific secondary harmonic components in voltage signal, then can increase DSC, MAF or other wave filters carry out Harmonics elimination；To same
When eliminate the influence of any subharmonic composition, then should directly use MAF that sliding step is power frequency period as filtration module, with
Obtain optimal filtering performance；
（4）Obtained according to step (3)U d、U q, select correct by Rule of judgmentθ ex, Rule of judgment is as follows：IfU d>0 andU q>
0, thenθ ex=0；IfU d<0, thenθ ex=π；IfU d>0 andU q<0, thenθ ex=2π；
（5）The parameter obtained according to step (3), (4)U d 、U q 、θ ex, the real-time width of line voltage is calculated with reference to amplitude, phase formula
Value and phase；Wherein, amplitude calculation formula is：, phase calculation formula is：。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710437036.XA CN107045082A (en) | 2017-06-12 | 2017-06-12 | The synchronized phase open loop detection method of high accuracy and anti-noise jamming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710437036.XA CN107045082A (en) | 2017-06-12 | 2017-06-12 | The synchronized phase open loop detection method of high accuracy and anti-noise jamming |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107045082A true CN107045082A (en) | 2017-08-15 |
Family
ID=59546430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710437036.XA Pending CN107045082A (en) | 2017-06-12 | 2017-06-12 | The synchronized phase open loop detection method of high accuracy and anti-noise jamming |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107045082A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019033827A1 (en) * | 2017-08-18 | 2019-02-21 | 比亚迪股份有限公司 | In-vehicle noise cancellation method, apparatus and device, and storage medium |
| CN110048423A (en) * | 2019-03-29 | 2019-07-23 | 电子科技大学 | A kind of current control method of immune Voltage Harmonic interference |
| CN110308326A (en) * | 2019-07-15 | 2019-10-08 | 国网山西省电力公司电力科学研究院 | A method of open loop can be improved and surveys phase algorithm noiseproof feature |
| CN110927452A (en) * | 2019-11-26 | 2020-03-27 | 华北水利水电大学 | Phase difference measuring method and device based on instantaneous reactive power |
| CN111521858A (en) * | 2020-06-18 | 2020-08-11 | 国网山西省电力公司电力科学研究院 | Method for extracting double-frequency alternating current component in rotating coordinate system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101487861A (en) * | 2009-02-27 | 2009-07-22 | 国网电力科学研究院 | Detection method for electric voltage phase angle jump at network voltage dip |
| CN103852640A (en) * | 2012-12-04 | 2014-06-11 | 中国北车股份有限公司 | Network voltage phase computing method and device and one-phase pulse width modulation rectifier |
| CN104808040A (en) * | 2015-04-30 | 2015-07-29 | 徐州上若科技有限公司 | Harmonic current detecting method based on virtual flux linkage phase locking |
| CN105588981A (en) * | 2016-01-13 | 2016-05-18 | 江苏昂内斯电力科技股份有限公司 | Power grid phase-lock method based on low-pass wave trapper |
| CN105790758A (en) * | 2016-04-07 | 2016-07-20 | 电子科技大学 | Improved phase-locked loop algorithm based on time-delay filter under mixed coordinate system |
-
2017
- 2017-06-12 CN CN201710437036.XA patent/CN107045082A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101487861A (en) * | 2009-02-27 | 2009-07-22 | 国网电力科学研究院 | Detection method for electric voltage phase angle jump at network voltage dip |
| CN103852640A (en) * | 2012-12-04 | 2014-06-11 | 中国北车股份有限公司 | Network voltage phase computing method and device and one-phase pulse width modulation rectifier |
| CN104808040A (en) * | 2015-04-30 | 2015-07-29 | 徐州上若科技有限公司 | Harmonic current detecting method based on virtual flux linkage phase locking |
| CN105588981A (en) * | 2016-01-13 | 2016-05-18 | 江苏昂内斯电力科技股份有限公司 | Power grid phase-lock method based on low-pass wave trapper |
| CN105790758A (en) * | 2016-04-07 | 2016-07-20 | 电子科技大学 | Improved phase-locked loop algorithm based on time-delay filter under mixed coordinate system |
Non-Patent Citations (1)
| Title |
|---|
| 熊连松 等: ""不对称电网同步相位的快速开环捕获方法研究"", 《中国电机工程学报》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019033827A1 (en) * | 2017-08-18 | 2019-02-21 | 比亚迪股份有限公司 | In-vehicle noise cancellation method, apparatus and device, and storage medium |
| CN110048423A (en) * | 2019-03-29 | 2019-07-23 | 电子科技大学 | A kind of current control method of immune Voltage Harmonic interference |
| CN110048423B (en) * | 2019-03-29 | 2023-02-03 | 电子科技大学 | Current control method for immune power grid voltage harmonic interference |
| CN110308326A (en) * | 2019-07-15 | 2019-10-08 | 国网山西省电力公司电力科学研究院 | A method of open loop can be improved and surveys phase algorithm noiseproof feature |
| CN110927452A (en) * | 2019-11-26 | 2020-03-27 | 华北水利水电大学 | Phase difference measuring method and device based on instantaneous reactive power |
| CN110927452B (en) * | 2019-11-26 | 2021-11-09 | 华北水利水电大学 | Phase difference measuring method and device based on instantaneous reactive power |
| CN111521858A (en) * | 2020-06-18 | 2020-08-11 | 国网山西省电力公司电力科学研究院 | Method for extracting double-frequency alternating current component in rotating coordinate system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107045082A (en) | The synchronized phase open loop detection method of high accuracy and anti-noise jamming | |
| CN102305886B (en) | Fundamental voltage synchronous signal detection method during harmonic distortion and unbalance of network voltage | |
| CN107706929B (en) | Minimum variance filtering-based adaptive phase-locked loop method and system | |
| CN104811188B (en) | Phaselocked loop dynamic property improved method based on sliding filter | |
| CN105116195B (en) | Suitable for the big method for detecting voltage drop of Voltage Harmonic content | |
| CN102401858A (en) | Method for detecting fundamental component and harmonic component of voltage of power grid | |
| CN106602895B (en) | The detection method and system of high voltage direct current transmission device commutation parameter | |
| CN104360137B (en) | A kind of electric voltage temporary drop detecting method suitable for dynamic electric voltage recovery device | |
| CN105162137B (en) | Idle and harmonic current detection under complex electric network | |
| CN102868183A (en) | Sliding-mode variable structure control method of single phase grid-connected inverter based on multi-resonant sliding mode surface | |
| CN104181374B (en) | Method for detecting and separating positive and negative sequence components of grid voltage of three-phase neutral-line-free system | |
| CN103267897A (en) | Three-phase-locked loop based on reversed Park conversion | |
| CN105785788A (en) | Rapid three-phase voltage phase-locked loop method and dynamic response performance analyzing method thereof | |
| CN111122952B (en) | Method for rapidly detecting three-phase voltage sag | |
| CN108761222A (en) | It is a kind of imbalance operating mode under network voltage order components quick extraction system and method | |
| CN103094924A (en) | Method and device for obtaining power grid synchronic benchmark sine based on absence of phase lock loop | |
| CN104502705A (en) | Non-phase-locked-loop rotating vector detection method suitable for power grid voltage distortion and imbalance | |
| CN105021872B (en) | The detection method of current components active component and idle composition under a kind of line voltage distortion asymmetrical state | |
| CN105680854A (en) | Phase-locked loop and phase locking method | |
| CN107271772B (en) | A kind of mains frequency rapid detection method of high-precision and anti-noise jamming | |
| CN101504442B (en) | Real-time detection method for double-SRF dual-feedback aerogenerator rotor current positive and negative components | |
| CN106026144A (en) | Voltage drop compensation method for dynamic voltage restorer | |
| CN107045081A (en) | The measuring method of real-time frequency in a kind of protection device | |
| CN111082436B (en) | Direct-drive wind power plant oscillation suppression method and system based on phase-locked consistency | |
| CN104184464B (en) | Dynamic phase lock synchronizing method based on rapid positive-sequence and negative-sequence recognition |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170815 |
|
| RJ01 | Rejection of invention patent application after publication |