CN204465509U - A kind of single-phase phase-locking device - Google Patents
A kind of single-phase phase-locking device Download PDFInfo
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- CN204465509U CN204465509U CN201420843056.9U CN201420843056U CN204465509U CN 204465509 U CN204465509 U CN 204465509U CN 201420843056 U CN201420843056 U CN 201420843056U CN 204465509 U CN204465509 U CN 204465509U
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- 238000000034 method Methods 0.000 claims abstract description 25
- 230000005611 electricity Effects 0.000 claims abstract description 15
- 238000001914 filtration Methods 0.000 claims abstract description 11
- 238000004364 calculation method Methods 0.000 claims abstract description 6
- 238000005070 sampling Methods 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 claims description 22
- 238000006243 chemical reaction Methods 0.000 claims description 4
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Abstract
The utility model discloses a kind of single-phase phase-locking device, in this device, zero-crossing examination phase locking unit and DQ coordinate system phase locking unit combine by Kalman filter, to the frequency that zero-crossing examination phase locking unit and DQ coordinate system phase locking unit send, phase place and amplitude carry out Kalman filtering, obtain final phase place, final amplitude and final frequency, utilize Kalman filtering significantly can eliminate sampling error, the advantage of recursive calculation fast response time, achieve the input signal of single-phase electricity system transmission quick, phase-locked function accurately, the dynamic property of ultra-traditional phase-locked loop far away and static properties, overcome traditional single phase phase-lock technique speed slow, the shortcoming be easily disturbed, achieve the phase place of input signal in single-phase electrical network, amplitude, frequency quick, phase-locked function accurately.
Description
Technical field
The utility model relates to Phase Lock Technique field, particularly relates to a kind of single-phase phase-locking device.
Background technology
Phase-locked link in single-phase electricity system is the basis of single-phase inverter, Power Quality Detection, and therefore the quality of phase locking unit performance is directly connected to the performance of the said equipment.Phase-locked principle is by certain control technology means or device, identifies ac grid voltage or electric current current residing sinusoidal wave amplitude, phase place, these three key parameters of frequency.
Phase-locked in order to realize, way general in prior art adopts zero-crossing examination or realizes phase-locked after producing one group of orthogonal signalling by a Second Order Generalized Integrator in DQ coordinate system.Above-mentioned two kinds of phase-locked methods are applied in single phase system exists some problems: the every half period of zero-crossing examination detects a secondary frequencies, although detection speed is very fast relatively, but be subject to the restriction of the factor such as external interference, departure and accuracy in detection can be affected, and the signal frequency situation of change between None-identified twice zero crossing; Single-phase DQ coordinate system phase-lock technique avoids the drawback of zero-crossing examination, greatly reduce phase-locked error, but be different from three-phase voltage system, the generation of single-phase phase-locked middle orthogonal signalling can significantly reduce phase-locked speed, cannot the catastrophe of accurate response voltage signal, also may cause phase-locked failure when disturbing larger.
Therefore, the single-phase phase-lock technique that a kind of phase-locked speed is fast, accuracy is high how is provided to be the problem that those skilled in the art need to solve at present.
Utility model content
The purpose of this utility model is to provide a kind of single-phase phase-locking device, overcomes the shortcoming that traditional single phase phase-lock technique speed slowly, is easily disturbed, and achieves the phase-locked fast and accurately function of the phase place of input signal in single-phase electrical network, amplitude, frequency.
For solving the problems of the technologies described above, the utility model provides a kind of single-phase phase-locking device, comprising:
Zero crossing acquisition equipment, described zero crossing acquisition equipment is connected with the zero crossing frequency detection module in zero-crossing examination phase locking unit, the input signal that described zero crossing acquisition equipment sends for receiving single-phase electricity system, and judges described input signal whether zero crossing; Described zero crossing frequency detection module is used for calculating second frequency according to the last zero crossing of described input signal to time interval of this zero crossing, and described second frequency is delivered to Kalman filter;
Analog to digital converter ADC respectively with the maximum value process amplitude detection model calling in DQ coordinate system phase locking unit and zero-crossing examination phase locking unit, for receiving the input signal that single-phase electricity system sends, analog-to-digital conversion is carried out to described input signal and obtains discrete input signal, described discrete input signal is sent to respectively DQ coordinate system phase locking unit and maximum value process amplitude detection module;
Described DQ coordinate system phase locking unit is connected with described Kalman filter, for calculating phase place, the first amplitude and first frequency according to described discrete input signal, and described phase place, the first amplitude and first frequency is delivered to described Kalman filter;
Described maximum value process amplitude detection module is connected with described Kalman filter, for determining the maximum of described discrete input signal within the described ADC sampling period, and obtains the second amplitude according to described maximum value calculation and delivers to described Kalman filter; Described Kalman filter is used for carrying out Kalman filtering to all described phase places, the first amplitude, first frequency, the second amplitude and second frequency, obtains final amplitude, final phase place and final frequency.
Preferably, described DQ coordinate system phase locking unit comprises:
Single-phase orthogonal signal generator, described single-phase orthogonal signal generator is connected with DQ coordinate system phase-locked loop and phase-locked loop FLL respectively, receive and produce one group of mutually orthogonal first sinusoidal signal and the second sinusoidal signal according to the frequency values that described discrete input signal and FLL FLL send and deliver to DQ coordinate system phase-locked loop, described first sinusoidal signal identical with described discrete input signal phase place or the second sinusoidal signal and described discrete input signal being carried out amplitude and subtract each other and obtain error signal and deliver to phase-locked loop FLL;
Described phase-locked loop FLL is connected with described DQ coordinate system phase-locked loop, using described error signal as input, the described frequency values with described input signal same frequency is obtained after error is followed the tracks of, and described frequency values is exported to described single-phase orthogonal signal generator and DQ coordinate system phase-locked loop, DQ coordinate system phase-locked loop is used for carrying out phase-locked calculating to described first sinusoidal signal, the second sinusoidal signal and frequency values, obtain described phase place, the first amplitude and first frequency, and described phase place, the first amplitude and first frequency are delivered to Kalman filter.
Preferably, described single-phase orthogonal signal generator is the single-phase orthogonal signal generator of second order improper integral SOGI.
Preferably, described input signal is voltage input signal.
Preferably, described input signal is current input signal.
The single-phase phase-locking device of the one that the utility model provides, by Kalman filter, zero-crossing examination phase locking unit and DQ coordinate system phase locking unit are combined, to the frequency that zero-crossing examination phase locking unit and DQ coordinate system phase locking unit send, phase place and amplitude carry out Kalman filtering, obtain final phase place, final amplitude and final frequency, the utility model utilizes Kalman filtering significantly can eliminate sampling error, the advantage of recursive calculation fast response time, achieve the input signal of single-phase electricity system transmission quick, phase-locked function accurately, the dynamic property of ultra-traditional phase-locked loop far away and static properties, overcome traditional single phase phase-lock technique speed slow, the shortcoming be easily disturbed, achieve the phase place of input signal in single-phase electrical network, amplitude, frequency quick, phase-locked function accurately.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, be briefly described to the accompanying drawing used required in prior art and embodiment below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of a kind of single-phase phase-locking device that Fig. 1 provides for the utility model.
Embodiment
Core of the present utility model is to provide a kind of single-phase phase-locking device, overcomes the shortcoming that traditional single phase phase-lock technique speed slowly, is easily disturbed, and achieves the phase-locked fast and accurately function of the phase place of input signal in single-phase electrical network, amplitude, frequency.
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Please refer to Fig. 1, the structural representation of a kind of single-phase phase-locking device that Fig. 1 provides for the utility model, this device comprises:
Zero crossing acquisition equipment 10, zero crossing acquisition equipment 10 is connected with the zero crossing frequency detection module 11 in zero-crossing examination phase locking unit, the input signal that zero crossing acquisition equipment 10 sends for receiving single-phase electricity system, and judges input signal whether zero crossing; Second frequency for calculating second frequency according to the last zero crossing of input signal to time interval of this zero crossing, and is delivered to Kalman filter 15 by zero crossing frequency detection module 11;
Be understandable that, the signal that first single-phase electricity system will detect exports, and as the input signal of single-phase phase-locking device, input signal here can be single-phase voltage sinusoidal signal, also can be monophase current sinusoidal signal.
Zero crossing acquisition equipment 10 receives the input signal that single-phase electricity system sends, and to input signal, whether zero crossing judges, by generation triggering signal and the zero crossing frequency detection module 11 be sent in zero-crossing examination phase locking unit at every turn when zero crossing acquisition equipment 10 detects input signal zero crossing, zero crossing frequency detection module 11 according to the last triggering signal to time interval of this triggering signal, namely the last zero crossing of input signal calculates second frequency to the time interval of this zero crossing, and second frequency is delivered to Kalman filter 15.
Analog to digital converter ADC12 is connected with the maximum value process amplitude detection module 14 in DQ coordinate system phase locking unit 13 and zero-crossing examination phase locking unit respectively, for receiving the input signal that single-phase electricity system sends, analog-to-digital conversion is carried out to input signal and obtains discrete input signal, discrete input signal is sent to respectively DQ coordinate system phase locking unit 13 and maximum value process amplitude detection module 14;
Be understandable that, analog to digital converter ADC12 carries out analog-to-digital conversion to input signal, convert input signal to digital quantity by analog quantity, and the output signal of digital quantity is sent to respectively the maximum value process amplitude detection module 14 in DQ coordinate system phase locking unit 13 and zero-crossing examination phase locking unit.
DQ coordinate system phase locking unit 13 is connected with Kalman filter 15, for calculating phase place, the first amplitude and first frequency according to discrete input signal, and phase place, the first amplitude and first frequency is delivered to Kalman filter 15;
Be understandable that, DQ coordinate system phase locking unit 13 comprises single-phase orthogonal signal generator 131, phase-locked loop FLL132 and DQ coordinate system phase-locked loop 133, wherein,
Single-phase orthogonal signal generator 131 receives and produces one group with the first mutually orthogonal sinusoidal signal of discrete input signal same frequency and the second sinusoidal signal according to the frequency values that discrete input signal and FLL FLL132 send delivers to DQ coordinate system phase-locked loop 133, first sinusoidal signal identical with discrete input signal phase place or the second sinusoidal signal and discrete input signal is carried out amplitude and subtracts each other and obtain error signal and deliver to phase-locked loop FLL132;
It should be noted that the essence of error signal is here amplitude difference.
In addition; the single-phase orthogonal signal generator 131 that the utility model uses is the single-phase orthogonal signal generator of second order improper integral SOGI; certainly; the utility model is also not limited in the single-phase orthogonal signal generator of SOGI, and the basis of the technical scheme principle provided at the utility model can realize the single-phase orthogonal signal generator of the utility model object all within protection range of the present utility model.
Error signal as input, is obtained the frequency values with input signal same frequency, and frequency values is exported to single-phase orthogonal signal generator 131 and DQ coordinate system phase-locked loop 133 by phase-locked loop FLL132 after error is followed the tracks of;
DQ coordinate system phase-locked loop 133 is after receiving the first sinusoidal signal, the second sinusoidal signal and frequency values, through inner with the control system of closed-loop structure phase-locked calculating is carried out to this group signal, obtain phase place, the first amplitude and first frequency, and phase place, the first amplitude and first frequency are delivered to Kalman filter 15.
Maximum value process amplitude detection module 14 is connected with Kalman filter 15, for determining the maximum of discrete input signal within the ADC sampling period, and obtains the second amplitude according to maximum value calculation and delivers to Kalman filter 15; Kalman filter 15, for carrying out Kalman filtering to all phase places, the first amplitude, first frequency, the second amplitude and second frequency, obtains final amplitude, final phase place and final frequency.
Be understandable that, Kalman filter 15 is after receiving phase place, the first amplitude, first frequency, the second amplitude and second frequency, after utilizing expanded Kalman filtration algorithm to carry out filtering calculating to input signal, obtain final amplitude, final phase place and final frequency.
Be understandable that, Kalman filter 15 is after receiving phase place, the first amplitude, first frequency, the second amplitude and second frequency, Kalman filter 15 is using phase place, the first amplitude, first frequency as the prediction of output value of single-phase electricity system, using the second amplitude, second frequency as the detection output valve of single-phase electricity system, using prediction of output value with detect after output valve is multiplied by kalman gain respectively and be added the value that the obtains output valve as Kalman filter again, obtain final amplitude, final phase place and final frequency.
It should be noted that Kalman filter adjusts kalman gain by iterative manner, the covariance realizing the prediction of output value of Kalman filter 15 and single-phase electricity systems axiol-ogy output valve is minimum.
The single-phase phase-locking device of the one that the utility model provides, by Kalman filter, zero-crossing examination phase locking unit and DQ coordinate system phase locking unit are combined, to the frequency that zero-crossing examination phase locking unit and DQ coordinate system phase locking unit send, phase place and amplitude carry out Kalman filtering, obtain final phase place, final amplitude and final frequency, the utility model utilizes Kalman filtering significantly can eliminate sampling error, the advantage of recursive calculation fast response time, achieve the input signal of single-phase electricity system transmission quick, phase-locked function accurately, the dynamic property of ultra-traditional phase-locked loop far away and static properties, overcome traditional single phase phase-lock technique speed slow, the shortcoming be easily disturbed, achieve the phase place of input signal in single-phase electrical network, amplitude, frequency quick, phase-locked function accurately.
Further, DQ coordinate system phase locking unit 13 comprises:
Single-phase orthogonal signal generator 131, single-phase orthogonal signal generator 131 is connected with DQ coordinate system phase-locked loop 133 and phase-locked loop FLL132 respectively, receive and produce one group of mutually orthogonal first sinusoidal signal and the second sinusoidal signal according to the frequency values that discrete input signal and FLL FLL132 send and deliver to DQ coordinate system phase-locked loop 133, first sinusoidal signal identical with discrete input signal phase place or the second sinusoidal signal and discrete input signal being carried out amplitude and subtract each other and obtain error signal and deliver to phase-locked loop FLL132;
Phase-locked loop FLL132 is connected with DQ coordinate system phase-locked loop 133, using error signal as input, after error is followed the tracks of, obtain the described frequency values with input signal same frequency, and frequency values is exported to single-phase orthogonal signal generator 131 and DQ coordinate system phase-locked loop 133.
Further, single-phase orthogonal signal generator 131 is the single-phase orthogonal signal generator of second order improper integral SOGI.
The single-phase orthogonal signal generator that the utility model uses is the single-phase orthogonal signal generator of second order improper integral SOGI; certainly; the utility model is also not limited in the single-phase orthogonal signal generator of SOGI, and the basis of the technical scheme principle provided at the utility model can realize the single-phase orthogonal signal generator of the utility model object all within protection range of the present utility model.
Further, input signal is voltage input signal.
Be understandable that, input signal can be single-phase voltage sinusoidal input signal, can be also monophase current sinusoidal input signal, specifically select which kind of signal not do special restriction as input signal the utility model at this, be determined by the actual situation.
It should be noted that, in this manual, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, the utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (5)
1. a single-phase phase-locking device, is characterized in that, comprising:
Zero crossing acquisition equipment, described zero crossing acquisition equipment is connected with the zero crossing frequency detection module in zero-crossing examination phase locking unit, the input signal that described zero crossing acquisition equipment sends for receiving single-phase electricity system, and judges described input signal whether zero crossing; Described zero crossing frequency detection module is used for calculating second frequency according to the last zero crossing of described input signal to time interval of this zero crossing, and described second frequency is delivered to Kalman filter;
Analog to digital converter ADC respectively with the maximum value process amplitude detection model calling in DQ coordinate system phase locking unit and zero-crossing examination phase locking unit, for receiving the input signal that single-phase electricity system sends, analog-to-digital conversion is carried out to described input signal and obtains discrete input signal, described discrete input signal is sent to respectively DQ coordinate system phase locking unit and maximum value process amplitude detection module;
Described DQ coordinate system phase locking unit is connected with described Kalman filter, for calculating phase place, the first amplitude and first frequency according to described discrete input signal, and described phase place, the first amplitude and first frequency is delivered to described Kalman filter;
Described maximum value process amplitude detection module is connected with described Kalman filter, for determining the maximum of described discrete input signal within the described ADC sampling period, and obtains the second amplitude according to described maximum value calculation and delivers to described Kalman filter; Described Kalman filter is used for carrying out Kalman filtering to all described phase places, the first amplitude, first frequency, the second amplitude and second frequency, obtains final amplitude, final phase place and final frequency.
2. single-phase phase-locking device as claimed in claim 1, is characterized in that, described DQ coordinate system phase locking unit comprises:
Single-phase orthogonal signal generator, described single-phase orthogonal signal generator is connected with DQ coordinate system phase-locked loop and phase-locked loop FLL respectively, receive and produce one group of mutually orthogonal first sinusoidal signal and the second sinusoidal signal according to the frequency values that described discrete input signal and FLL FLL send and deliver to DQ coordinate system phase-locked loop, described first sinusoidal signal identical with described discrete input signal phase place or the second sinusoidal signal and described discrete input signal being carried out amplitude and subtract each other and obtain error signal and deliver to phase-locked loop FLL;
Described phase-locked loop FLL is connected with described DQ coordinate system phase-locked loop, using described error signal as input, the described frequency values with described input signal same frequency is obtained after error is followed the tracks of, and described frequency values is exported to described single-phase orthogonal signal generator and DQ coordinate system phase-locked loop, DQ coordinate system phase-locked loop is used for carrying out phase-locked calculating to described first sinusoidal signal, the second sinusoidal signal and frequency values, obtain described phase place, the first amplitude and first frequency, and described phase place, the first amplitude and first frequency are delivered to Kalman filter.
3. single-phase phase-locking device as claimed in claim 1, is characterized in that, described single-phase orthogonal signal generator is the single-phase orthogonal signal generator of second order improper integral SOGI.
4. single-phase phase-locking device as claimed in claim 1, is characterized in that, described input signal is voltage input signal.
5. single-phase phase-locking device as claimed in claim 1, is characterized in that, described input signal is current input signal.
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| CN201420843056.9U CN204465509U (en) | 2014-12-25 | 2014-12-25 | A kind of single-phase phase-locking device |
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| CN201420843056.9U CN204465509U (en) | 2014-12-25 | 2014-12-25 | A kind of single-phase phase-locking device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106580299A (en) * | 2015-10-14 | 2017-04-26 | 冯文强 | Signal processing method and device used for heart rate measurement and intelligent watch |
| CN108037352A (en) * | 2017-11-14 | 2018-05-15 | 国家电网公司 | A kind of method and system for improving electric energy measurement accuracy |
| CN111550913A (en) * | 2020-05-20 | 2020-08-18 | 宁波奥克斯电气股份有限公司 | Phase locking device and air conditioner |
-
2014
- 2014-12-25 CN CN201420843056.9U patent/CN204465509U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106580299A (en) * | 2015-10-14 | 2017-04-26 | 冯文强 | Signal processing method and device used for heart rate measurement and intelligent watch |
| CN108037352A (en) * | 2017-11-14 | 2018-05-15 | 国家电网公司 | A kind of method and system for improving electric energy measurement accuracy |
| CN111550913A (en) * | 2020-05-20 | 2020-08-18 | 宁波奥克斯电气股份有限公司 | Phase locking device and air conditioner |
| CN111550913B (en) * | 2020-05-20 | 2022-01-21 | 宁波奥克斯电气股份有限公司 | Phase locking device and air conditioner |
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