CN206259920U - One kind is based on double Second Order Generalized Integrator phaselocked loops - Google Patents
One kind is based on double Second Order Generalized Integrator phaselocked loops Download PDFInfo
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Abstract
Second Order Generalized Integrator phaselocked loop, including 4 parts are based on the utility model discloses one kind, are 1. phase discriminator, are 2. positive sequence phase extraction link, are 3. loop filter, are 4. voltage controlled oscillator；Wherein phase discriminator, positive sequence phase extraction link, loop filter, voltage controlled oscillator are sequentially connected and connect, and the output of loop filter is connected with the SOGI of positive sequence phase extraction link, the output end of voltage controlled oscillator is connected with positive sequence phase extraction link, so as to constitute whole phase-locked loop systems.Detection method, by after a PARK conversion, by the filtering of loop filter, is finally realized locking phase to input signal by after the extraction for carrying out input signal positive sequence phase.It is of the present utility model can be the advantages of the accurate tracking of the accurate calculating and phase that accurately detect input voltage frequency and phase information in real time in the case of imbalance of three-phase voltage or distortion, realize signal frequency based on double Second Order Generalized Integrator phaselocked loops.
Description
Technical field
The utility model is related to a kind of pair of second-order integrator phaselocked loop.
Background technology
It is widely used in industrial production with high-power electric and electronic product, electricity in its electric harmonic serious harm for producing
The safe and stable operation of Force system and other industrial productions.Therefore, the electric harmonic eliminated in public electric wire net is just controlled as harmonic wave
Reason main task.Active Power Filter-APF（Active Power Filter APF）Can be used for Harmonious Waves in Power Systems administer, it is idle
Electric current is dynamically compensated.General principle is that harmonic current is detected from target compensation, and one is produced with the harmonic wave by compensation device
The equal opposite polarity compensation electric current of size of current, so that the harmonic and reactive currents in removing principal current.Therefore, realize to humorous
Ripple electric current precise real-time detection is an important step in APF.
In electric network voltage phase detection, single-phase voltage or three line voltage positive-sequence components are generally detected using phaselocked loop
Amplitude, frequency and phase information, so as to detection is obtained into voltage phase information for current detecting.Phaselocked loop is used as active power filtering
One of core technology of device functional realiey, its performance directly affects the performance of active filter.In view of phaselocked loop is in active power filtering
Importance in terms of functional realiey, many scholars propose many improvement projects and realize technology, make the performance of phaselocked loop continuous
Improve.
Fig. 7 is the structured flowchart of conventional phase locked loops, and phaselocked loop is mainly by phase discriminator, loop filter, voltage controlled oscillator structure
Into.The general principle of the phaselocked loop is：Line voltage is gone to control VCO by phase discriminator after loop filter is filtered
Device, so as to change the frequency and phase of internal system synchronizing signal, is allowed to consistent with line voltage.This phaselocked loop links is all
Comprising many contents, realize complex, and accurate phase is difficult in the case of unbalanced source voltage or distortion
Position detection, is unfavorable for engineer applied.
The content of the invention
The utility model is to avoid weak point present in above-mentioned prior art, it is indicated that one kind is based on second order Generalized Product
Divide device phaselocked loop, in the case of realizing Voltage unbalance or distortion, effectively to detect that electric voltage frequency and phase are believed in real time
Cease, realize the accurate calculating of signal frequency and the accurate tracking of phase.
The utility model uses following technical scheme to solve technical problem.
Based on double Second Order Generalized Integrator phaselocked loops, it is structurally characterized in that, including phase discriminator, positive sequence phase extraction link,
Loop filter, voltage controlled oscillator；The phase discriminator input termination detected signal, the output end of the phase discriminator with it is described
The input of positive sequence phase extractor is connected, and the output end of the positive sequence phase extractor is connected with loop filter input
Connect, the output end of the loop filter respectively with the Second Order Generalized Integrator (SOGI) of the positive sequence phase extraction link and institute
The input for stating voltage controlled oscillator is connected, output end and the positive sequence phase extraction link of the voltage controlled oscillatorIt is connected
Connect.
Compared with the prior art, the utility model has the beneficial effect that：
The utility model provides a kind of based on double Second Order Generalized Integrator phaselocked loops, it is adaptable to which line voltage is balanced and sent out
The detection method of raw uneven or distortion frequency and phase information.To the imbalance or network deformation voltage signal of input, lead to
90 degree of phase shifts that second order improper integral (SOGI) carries out two phase informations that phase discriminator is obtained respectively are crossed, is then carried out simple
Mathematical computations, so as to filter the negative sequence component of line voltage, obtain corresponding positive sequence phase information.Then by loop filtering
The regulation of device and the calculating of voltage controlled oscillator, finally obtain the accurate phase of uneven or distorted voltage.Compared to conventional phase locked loops
Technology, the scope that this phaselocked loop meets is wider, detects that the frequency and phase information of acquisition are more accurate, is easy to practical application.
It is of the present utility model based on Second Order Generalized Integrator phaselocked loop, the frequency letter of input signal can be effectively detected in real time
Breath and phase information.The accurate calculating of signal frequency and the accurate tracking of phase information are realized, is realized simple and is easy to actual answering
The advantages of using.
Brief description of the drawings
Fig. 1 is the structure chart based on Second Order Generalized Integrator phaselocked loop of the present utility model.
Fig. 2 is the flow chart of the detection method of voltage-phase of the present utility model and frequency.
Fig. 3 is the structure chart of the utility model Second Order Generalized Integrator (SOGI).
Fig. 4 is the analogous diagram based on Second Order Generalized Integrator phaselocked loop of the present utility model.
Fig. 5 for line voltage contain harmonic wave when, conventional phase locked loops and the utility model phaselocked loop are to analogous diagram.
Fig. 6 for line voltage contain harmonic wave when, conventional phase locked loops and the utility model phaselocked loop are to analogous diagram.
Fig. 7 is the structured flowchart of conventional phase locked loops.
Specific embodiment
Referring to Fig. 1, based on double Second Order Generalized Integrator phaselocked loops, including the filter of phase discriminator, positive sequence phase extraction link, loop
Ripple device, voltage controlled oscillator；The input termination detected signal of the phase discriminator, the output end of the phase discriminator and the positive sequence phase
The input of position extractor is connected, and the output end of the positive sequence phase extractor is connected with loop filter input, institute
State the output end of loop filter respectively with the Second Order Generalized Integrator (SOGI) of the positive sequence phase extraction link and the pressure
The input of controlled oscillator is connected, output end and the positive sequence phase extraction link of the voltage controlled oscillatorIt is connected.
The effect of the phase discriminator is that line voltage is carried out into CLARK conversion, obtains the phase information of voltage, and will be adopted
The phase information of sample is transported to positive sequence phase extraction link, and positive sequence phase extraction link carries out phase shift to the phase information being input into,
And carry out the phase information that simple mathematical computations obtain positive sequence.Phase information is input in loop filter simultaneously, loop
Wave filter carries out proportional integral adjustment to the phase information being input into, and the phase information after adjustment is input into voltage controlled oscillator
In, voltage controlled oscillator is integrated again to it and complementation finally obtains the phase information of line voltage.
Of the present utility model pair of Second Order Generalized Integrator phaselocked loop, can be accurate in the case where line voltage is balanced or is distorted
The frequency and phase information of line voltage are really obtained, fast response time is easy to practical application.
Using above-mentioned phase and frequency detection, overall step such as Fig. 2 are carried out based on double Second Order Generalized Integrator phaselocked loops
Shown, specific detecting step is as follows.
To the mains voltage signal of three-phase imbalance, by phase discriminator link, voltage signal is become by CLARK
Change, obtainWith。
By what is obtainedWithThe Second Order Generalized Integrator (SOGI) of positive sequence phase extraction link is input to, it is distinguished
90 for carrying outoPhase shift, so as to obtainWith, plus-minus is carried out to itself and the signal of input and calculates acquisitionWith；Wherein
The structure of Second Order Generalized Integrator is as shown in figure 3, its transmission function is：
（1）
（2）
Formula（1）And formula（2）InFor input signal voltage andFor the angular frequency that loop filter is produced.
WillWithPARK conversion is carried out to obtainWith。
WillIt is input in loop filter, carrying out proportional integral to it is 0, a base is superimposed on its basis
The angular frequency of wave frequency rate,, obtain。
By what is obtained, the SOGI the insides and voltage controlled oscillator the inside of positive sequence phase extraction link are separately input to, in pressure
Said that integration and complementation finally obtained the frequency and phase information of line voltage in control oscillator link the inside.
It is as shown in Figure 4 simulation model to be built in MATLAB simulation softwares.And it is imitative to carry out contrast with traditional phaselocked loop
Very, so as to verify the accuracy of phaselocked loop of the present utility model.
Input signal 1 is that amplitude is the balanced voltage of 220V；Input signal 2 is that amplitude is 5 subharmonic voltages of 44V；It is defeated
Enter the negative sequence voltage that signal 3 is for amplitude 44V, A phase initial phase angle.
Simulation time is 0.08s, and input signal 1 increases suddenly signal 2, conventional phase locked loops (SPLL) and this reality in 0.04s
With the contrast simulation waveform of new phaselocked loop DSOGI-SPLL.As shown in Figure 5.
Simulation time is 0.08s, and input signal 1 increases suddenly signal 3, conventional phase locked loops (SPLL) and this reality in 0.04s
With the contrast simulation waveform of new phaselocked loop DSOGI-SPLL.As shown in Figure 6.
From accompanying drawing 5-6 simulation waveforms can be seen that set forth herein Design of PLL method can be uneven in line voltage
The accurate phase information for obtaining power network in the case of weighing apparatus or distortion, its lock phase high precision, fast response time is easy to practical application.
Claims (1)
1. Second Order Generalized Integrator phaselocked loop is based on, it is characterized in that, including phase discriminator, positive sequence phase extraction link, loop filtering
Device, voltage controlled oscillator；The input termination detected signal of the phase discriminator, the output end of the phase discriminator and the positive sequence phase
The input of extractor is connected, and the output end of the positive sequence phase extractor is connected with loop filter input, described
The output end of loop filter respectively with the Second Order Generalized Integrator (SOGI) of the positive sequence phase extraction link and described voltage-controlled
The input of oscillator is connected, output end and the positive sequence phase extraction link of the voltage controlled oscillatorIt is connected.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111555752A (en) * | 2020-05-14 | 2020-08-18 | 贵州理工学院 | Single-phase frequency self-adaptive phase-locked loop |
| CN111835343A (en) * | 2020-07-24 | 2020-10-27 | 徐州上若科技有限公司 | Phase-locked loop based on double decoupling structure |
| CN112362963A (en) * | 2020-10-15 | 2021-02-12 | 中国科学院上海天文台 | Doppler frequency measurement method based on improved phase-locked loop |
| CN112671402A (en) * | 2020-12-04 | 2021-04-16 | 南京航空航天大学 | Improved single-phase-locked loop algorithm based on cascaded SOGI |
| CN113282115A (en) * | 2021-05-31 | 2021-08-20 | 华中科技大学 | Phase-shift generalized integral extended state observer, vibration suppression method and system |
-
2016
- 2016-09-27 CN CN201621079775.3U patent/CN206259920U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111555752A (en) * | 2020-05-14 | 2020-08-18 | 贵州理工学院 | Single-phase frequency self-adaptive phase-locked loop |
| CN111555752B (en) * | 2020-05-14 | 2023-06-16 | 贵州理工学院 | Single-phase frequency self-adaptive phase-locked loop |
| CN111835343A (en) * | 2020-07-24 | 2020-10-27 | 徐州上若科技有限公司 | Phase-locked loop based on double decoupling structure |
| CN112362963A (en) * | 2020-10-15 | 2021-02-12 | 中国科学院上海天文台 | Doppler frequency measurement method based on improved phase-locked loop |
| CN112362963B (en) * | 2020-10-15 | 2023-07-14 | 中国科学院上海天文台 | Doppler frequency measurement method based on improved phase-locked loop |
| CN112671402A (en) * | 2020-12-04 | 2021-04-16 | 南京航空航天大学 | Improved single-phase-locked loop algorithm based on cascaded SOGI |
| CN112671402B (en) * | 2020-12-04 | 2024-05-28 | 南京航空航天大学 | Improved single-phase-locked loop algorithm based on cascading SOGI |
| CN113282115A (en) * | 2021-05-31 | 2021-08-20 | 华中科技大学 | Phase-shift generalized integral extended state observer, vibration suppression method and system |
| CN113282115B (en) * | 2021-05-31 | 2022-03-29 | 华中科技大学 | Phase-shift generalized integral extended state observer, vibration suppression method and system |
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