CN103916021B - Three-phase voltage phase shifter and the method for three-phase voltage phase shift - Google Patents
Three-phase voltage phase shifter and the method for three-phase voltage phase shift Download PDFInfo
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Abstract
The invention provides a kind of three-phase voltage phase shifter and the method for three-phase voltage phase shift, wherein, this three-phase voltage phase shifter includes: three-phase isolation transformer, first connection end of three-phase isolation transformer is connected to compensator transformer, second connection end of three-phase isolation transformer is connected to the first connection end of pressure regulator, for regulating the phase place of the voltage of compensator transformer according to the no-load voltage ratio of pressure regulator；Pressure regulator, the second connection end of pressure regulator is connected to compensator transformer, for regulating the amplitude of the voltage of compensator transformer according to the no-load voltage ratio of pressure regulator；Compensator transformer, the secondary of compensator transformer is connected on the three-phase firewire of three phase mains, for by the regulation of compensator transformer the voltage of phase and amplitude superpose with the Voltage Series of three phase mains.The present invention solves the transformer type phase shifter in correlation technique and can not meet the problem of application demand, such that it is able to meet the demand of different application scene.
Description
Technical field
The present invention relates to for electrical domain, in particular to a kind of three-phase voltage phase shifter and the method for three-phase voltage phase shift.
Background technology
Important power load many employings dual power supply, closes, by fast incision, the switching realizing between two power supplys, it is ensured that the reliability of its power supply.Between two power supplys, voltage-phase is different, and its switching time is the most different, and the Voltage Drop time being induced by is the most different, and the impact for sensitive load is the most different.
Transformator phase shift technology and Digital Measuring Technique have been carried out organic combination by the phase shifter, make phase shift degree of regulation high, accuracy of reading is directly perceived, output voltage, current adjustment, good output waveform, reliable, easy to operate, the test verification of the single-phase of degree of precision and the instrument such as three-phase AC power, phase place can be met, can be used among the assay device of kilowatt-hour meter.
Phase shifter suffers from being widely applied in fields such as radar, missile attitude control, accelerator, communication, instrument and meter even music.
At present, mainly there be transformer type phase shifter, digital phase shifter two kinds the voltage phase shifter on market.
(1) the transformer type phase shifter
The common transformer type phase shifter utilizes three-phase voltage to differ 120 °, can form 6 phases or 12 phases even 24 phase power supply by the connection of transformer coil, and the three-phase voltage phasor that also will input is converted into 6 or 12 even 24 voltage phasors.The output voltage different from original voltage-phase is synthesized to reach the purpose of phase shift through many grades of multipole switching switches set, by changing voltage phasor number, the angle of its phase shift determines that switching switch often switches the number of degrees of one grade of phase shift, such as, by aforementioned 6 phases, 12 phases, 24 phases often switch one grade of phase shift 60 ° respectively, 30 °, 15 °.
Li Naizhong of Shenyang Engineering College et al. have developed the autotransformer type phase shifter in electric energy meter checking device, can not only realize smoother phase modulation and also expand the scope of phase modulation after phase shift fine tuning is made improvement, makes phase shift fine tuning scope reach-5 °～30 °.
(2) digital phase shifter
nullChen Zhenxin of Jinhua Power Switch Co., Ltd. et al. devises a kind of high-power phase shifter，This high-power phase shifter includes current rectifying and wave filtering circuit、Igbt (InsulateGateBipolarTransistor，Referred to as IGBT) current foldback circuit、Output filter circuit、Load，It is characterized in that: current rectifying and wave filtering circuit connects sine wave generation circuit through phase-locked loop circuit，The sine wave signal that sine wave generation circuit produces controls sine wave pulse width modulated (SinusoidalPulse-WidthModulation，Referred to as SPWM) circuit evolving SPWM signal，SPWM signal controls the work of IGBT current foldback circuit，At sinusoidal wave read only memory (Read-OnlyMemory，Referred to as ROM) circuit has the data of very multidraw，These data are through synthesis sine signal，When these data the most mobile when，Just can control the phase angle of synthesis sine.This phase shifter can realize three-phase phase independence phase shift.
Xie Jun et al. have developed a kind of single-phase digital working frequency phase shifter by voltage phase shift output single-phase voltage signal, and this single-phase digital working frequency phase shifter includes single-chip minimum system, signal switch logic, phase locking frequency multiplying, waveform generator, keyboard and the part such as display, power amplifier that input signal processes, formed by 8032.Signal switch logic is from external reference signal (phase shifter mode) or from internal signal (signal generator mode) for controlling to input the signal of phase-locking frequency multiplication circuit.Single-chip minimum system completes the operations such as measurement, control, and work phase locking frequency multiplying and waveform generator are the cores of phase shifter.
According to the above-mentioned introduction to existing two kinds of voltage phase shifter technology, in conjunction with abundant phase shift technology experience, the problem and the weaknesses analysis that there is the existing voltage phase shifter are as follows:
(1) the transformer type phase shifter
Common transformer type phase shifter phase shift angle is very thick, and can not mutually the most independent phase shift, these can not meet the most far away test and on-the-spot needs.
Its output voltage of voltage phase shifter that Li Naizhong of Shenyang Engineering College et al. develops to match with pressure regulator.When supply voltage is 220V, the maximum voltage being added on output voltage regulator is 245V, and too high input voltage may make pressure regulator output waveform degenerate, and output is less than normal.
(2) digital phase shifter
Voltage phase shifter that the Chen Zhen of Jinhua Power Switch Co., Ltd. newly develops extra employing ROM address control circuit is with phase perturbation control circuit, for detecting the mistake zero state of sine wave output.Therefore circuit structure wants complexity relatively.
The digital working frequency phase shifter that Xie Jun et al. develops is the single-phase phase shifter, if three-phase function to be realized, three single-phase phase shifters must be needed to realize.And output is limited, particularly High-current output is difficult to reach a standard.
For problem at least one above-mentioned in correlation technique, effective solution is the most not yet proposed.
Summary of the invention
The invention provides a kind of three-phase voltage phase shifter and the method for three-phase voltage phase shift, at least to solve the problem that the transformer type phase shifter in correlation technique can not meet application demand.
According to an aspect of the present invention, provide a kind of three-phase voltage phase shifter, comprising: three-phase isolation transformer, first connection end of above-mentioned three-phase isolation transformer is connected to compensator transformer, second connection end of above-mentioned three-phase isolation transformer is connected to the first connection end of pressure regulator, for regulating the phase place of the voltage of above-mentioned compensator transformer according to the no-load voltage ratio of above-mentioned pressure regulator；Above-mentioned pressure regulator, the second connection end of above-mentioned pressure regulator is connected to above-mentioned compensator transformer, for regulating the amplitude of the voltage of above-mentioned compensator transformer according to the no-load voltage ratio of above-mentioned pressure regulator；Above-mentioned compensator transformer, the secondary of above-mentioned compensator transformer is connected on the three-phase firewire of three phase mains, for by the regulation of above-mentioned compensator transformer the voltage of phase and amplitude superpose with the Voltage Series of above-mentioned three phase mains.
Preferably, the secondary of above-mentioned compensator transformer includes: centre tap, and above-mentioned centre tap is connected to the former limit in the first connection end of above-mentioned three-phase isolation transformer；First connection end of above-mentioned pressure regulator includes: former limit, and above-mentioned former limit is connected to the secondary in the second connection end of above-mentioned three-phase isolation transformer；Second connection end of above-mentioned pressure regulator includes: outfan, above-mentioned outfan is connected to the former limit of above-mentioned compensator transformer.
Preferably, the above-mentioned three-phase voltage phase shifter also includes: control parts, for sampling at least one parameter: the voltage of above-mentioned three phase mains, above-mentioned compensator transformer regulation after voltage superpose voltage, the electric current of above-mentioned compensator transformer outfan obtained with the Voltage Series of above-mentioned three phase mains.
Preferably, the above-mentioned three-phase voltage phase shifter also includes: display unit, be connected to above-mentioned control parts, be used for showing at least one information: the electric current of above-mentioned compensator transformer outfan, above-mentioned compensator transformer regulation after voltage superposes the voltage that obtains with the Voltage Series of above-mentioned three phase mains, overlapped in series obtains voltage and the voltage of above-mentioned three phase mains between phase contrast.
Preferably, input block, poor for inputting the preset phase between voltage and the voltage of above-mentioned three phase mains that overlapped in series obtains；Above-mentioned control parts, are additionally operable to produce control command according to above-mentioned preset phase difference, and wherein, above-mentioned control command is for regulating the no-load voltage ratio of above-mentioned pressure regulator.
Preferably, the above-mentioned three-phase voltage phase shifter also includes: at least one: fuse, it is connected on the three-phase firewire of three-phase voltage phase shifter inputs；Air switch, is connected on the three-phase firewire of above-mentioned three-phase voltage phase shifter inputs；A.C. contactor, is connected on the three-phase firewire of above-mentioned three-phase voltage phase shifter outfan.
According to a further aspect in the invention, a kind of method providing three-phase voltage phase shift, comprising: regulated the phase place of the voltage of compensator transformer according to the no-load voltage ratio of pressure regulator by three-phase isolation transformer, wherein, first connection end of above-mentioned three-phase isolation transformer is connected to above-mentioned compensator transformer, and the second connection end of above-mentioned three-phase isolation transformer is connected to the first connection end of above-mentioned pressure regulator；Regulated the amplitude of the voltage of above-mentioned compensator transformer according to the no-load voltage ratio of above-mentioned pressure regulator by above-mentioned pressure regulator, wherein, the second connection end of above-mentioned pressure regulator is connected to above-mentioned compensator transformer；By above-mentioned compensator transformer by the regulation of above-mentioned compensator transformer the voltage of phase and amplitude superpose with the Voltage Series of above-mentioned three phase mains, wherein, the secondary of above-mentioned compensator transformer is connected on the three-phase firewire of three phase mains.
Preferably, the secondary of above-mentioned compensator transformer includes: centre tap, and above-mentioned centre tap is connected to the former limit in the first connection end of above-mentioned three-phase isolation transformer；First connection end of above-mentioned pressure regulator includes: former limit, and above-mentioned former limit is connected to the secondary in the second connection end of above-mentioned three-phase isolation transformer；Second connection end of above-mentioned pressure regulator includes: outfan, above-mentioned outfan is connected to the former limit of above-mentioned compensator transformer.
Preferably, said method also includes: gather at least one parameter: the voltage of above-mentioned three phase mains, above-mentioned compensator transformer regulation after voltage superpose voltage, the electric current of above-mentioned compensator transformer outfan obtained with the Voltage Series of above-mentioned three phase mains；Parameter according to gathering shows at least one information: the electric current of above-mentioned compensator transformer outfan, above-mentioned compensator transformer regulation after voltage superposes the voltage that obtains with the Voltage Series of above-mentioned three phase mains, overlapped in series obtains voltage and the voltage of above-mentioned three phase mains between phase contrast.
Preferably, said method also includes: the preset phase between voltage and the voltage of above-mentioned three phase mains that input overlapped in series obtains is poor；Producing control command according to above-mentioned preset phase difference, wherein, above-mentioned control command is for regulating the no-load voltage ratio of above-mentioned pressure regulator.
In the present invention, it is connected to compensator transformer by the first connection end of three-phase isolation transformer, second connection end of above-mentioned three-phase isolation transformer is connected to the first connection end of pressure regulator, and above-mentioned three-phase isolation transformer for regulating the phase place of the voltage of above-mentioned compensator transformer according to the no-load voltage ratio of above-mentioned pressure regulator；Second connection end of above-mentioned pressure regulator is connected to above-mentioned compensator transformer, and above-mentioned pressure regulator for regulating the amplitude of the voltage of above-mentioned compensator transformer according to the no-load voltage ratio of above-mentioned pressure regulator；The secondary of above-mentioned compensator transformer is connected on the three-phase firewire of three phase mains, for by the regulation of above-mentioned compensator transformer the voltage of phase and amplitude fold with the Voltage Series of above-mentioned three phase mains, achieve the no-load voltage ratio that can regulate above-mentioned pressure regulator according to different demands, and then amplitude and the phase place of the voltage of above-mentioned compensator transformer is regulated according to the no-load voltage ratio after regulation, the voltage of the voltage and three phase mains that regulated amplitude and phase place is carried out overlapped in series by above-mentioned compensator transformer, realize the purpose of the three-phase electricity phase shift to three phase mains, above-mentioned when regulating the no-load voltage ratio of pressure regulator, can realize the precision of phase shift during three-phase electricity phase shift and the scope of phase shift are adjusted, such that it is able to meet the demand of different application scene.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, and the schematic description and description of the present invention is used for explaining the present invention, is not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of three-phase voltage phase shifter according to embodiments of the present invention；
Fig. 2 is the internal circuit connection diagram of three-phase voltage phase shifter according to embodiments of the present invention；
Fig. 3 is the structural representation of another kind of three-phase voltage phase shifter according to embodiments of the present invention；
Fig. 4 is the flow chart of the method for three-phase voltage phase shift according to embodiments of the present invention.
Detailed description of the invention
Below with reference to accompanying drawing and describe the present invention in detail in conjunction with the embodiments.It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined.
Present embodiments provide a kind of three-phase voltage phase shifter, as shown in Figure 1, this three-phase voltage phase shifter includes: three-phase isolation transformer 102, first connection end of three-phase isolation transformer is connected to compensator transformer, second connection end of three-phase isolation transformer is connected to the first connection end of pressure regulator, for regulating the phase place of the voltage of compensator transformer according to the no-load voltage ratio of pressure regulator；Pressure regulator 104, the second connection end of pressure regulator is connected to compensator transformer, for regulating the amplitude of the voltage of compensator transformer according to the no-load voltage ratio of pressure regulator；Compensator transformer 106, the secondary of compensator transformer is connected on the three-phase firewire of three phase mains (preferably, connect end by A, B, C tri-as shown in Figure 1 to be connected), for by the regulation of compensator transformer the voltage of phase and amplitude superpose with the Voltage Series of three phase mains.Compensator transformer 106 is also connected with zero line (i.e. N in Fig. 1).
In the above-described embodiments, it is connected to compensator transformer by the first connection end of three-phase isolation transformer, second connection end of above-mentioned three-phase isolation transformer is connected to the first connection end of pressure regulator, and above-mentioned three-phase isolation transformer for regulating the phase place of the voltage of above-mentioned compensator transformer according to the no-load voltage ratio of above-mentioned pressure regulator；Second connection end of above-mentioned pressure regulator is connected to above-mentioned compensator transformer, and above-mentioned pressure regulator for regulating the amplitude of the voltage of above-mentioned compensator transformer according to the no-load voltage ratio of above-mentioned pressure regulator；The secondary of above-mentioned compensator transformer is connected on the three-phase firewire of three phase mains, for by the regulation of above-mentioned compensator transformer the voltage of phase and amplitude fold with the Voltage Series of above-mentioned three phase mains, achieve the no-load voltage ratio that can regulate above-mentioned pressure regulator according to different demands, and then amplitude and the phase place of the voltage of above-mentioned compensator transformer is regulated according to the no-load voltage ratio after regulation, the voltage of the voltage and three phase mains that regulated amplitude and phase place is carried out overlapped in series by above-mentioned compensator transformer, realize the purpose of the three-phase electricity phase shift to three phase mains, when the no-load voltage ratio of above-mentioned regulation pressure regulator, can realize the precision of phase shift during three-phase electricity phase shift and the scope of phase shift are adjusted, such that it is able to meet the demand of different application scene.
Preferably, it is adjusted the no-load voltage ratio of above-mentioned regulation pressure regulator, the precision of phase shift during three-phase electricity phase shift and the scope of phase shift can be adjusted, such as, phase shifting accuracy can be 1 °, accurately smooth can carry out phase shift, phase shift range can reach 0 °～45 °, and voltage pulsation can be: fine tuning≤2.0%.
Amplitude and phase place in order to realize the voltage to above-mentioned compensator transformer are adjusted, in the preferred embodiment, the secondary of above-mentioned compensator transformer 106 includes: centre tap, and above-mentioned centre tap is connected to the former limit in the first connection end of above-mentioned three-phase isolation transformer 102；First connection end of above-mentioned pressure regulator 104 includes: former limit, and above-mentioned former limit is connected to the secondary in the second connection end of above-mentioned three-phase isolation transformer 102；Second connection end of above-mentioned pressure regulator 104 includes: outfan, above-mentioned outfan is connected to the former limit of above-mentioned compensator transformer 106.
nullPreferably，Above-mentioned three-phase isolation transformer、Circuit between above-mentioned pressure regulator and above-mentioned compensator transformer connects can be as shown in Figure 2，Compensator transformer T1(106) secondary be connected in major loop，T1 subcarrier band centre tap，It is connected to three-phase isolation transformer T2(102) former limit，T2 connecting group grade can be DY0-3，T2 secondary receives electronic automatic coupling voltage regulator T3(104) former limit，Realize delayed 90 ° of rotations that the no-load voltage ratio according to electronic automatic coupling voltage regulator T3 regulates the voltage-phase of compensator transformer T1，Pressure regulator outlet side receives the former limit of compensator transformer T1，By controlling the no-load voltage ratio of electronic automatic coupling voltage regulator T3，Realize the amplitude of the voltage of regulation compensator transformer，And then by three-phase mains voltage and phase ± 90 °、Amplitude adjustable Voltage Series superposition，Realize the three-phase voltage phase shifter adjustable purpose of outlet side three-phase potential.N in figure represents zero line, and A, B, C represent three inputs of this three-phase isolation transformer respectively, and A ', B ', C ' represent three outfans of this three-phase isolation transformer respectively, and UA represents the voltage of A point, and UA ' represents the voltage that A ' puts.Preferably, it is Y/y0-12 that above-mentioned compensator transformer T1 can choose group, and parameter is the transformator of 380/380；It is D/y0-3 that above-mentioned isolating transformer T2 can choose group, and parameter is the transformator of 9/380/380；Above-mentioned electronic automatic coupling voltage regulator T3 can transformator with Selecting All Parameters as 380/0-430.The transformator being above choosing be one preferred embodiment, the embodiment of the present invention is not limited to this, it is also possible to uses other type of transformator, does not limits at this.
The result of three-phase electricity phase shift is checked for the ease of user, in the preferred embodiment, the above-mentioned three-phase voltage phase shifter also includes: control parts, for sampling at least one parameter: the voltage of above-mentioned three phase mains, above-mentioned compensator transformer regulation after voltage superpose voltage, the electric current of above-mentioned compensator transformer outfan obtained with the Voltage Series of above-mentioned three phase mains.
Preferably, as shown in Figure 3, above-mentioned control parts can use digital signal processor (DigitalSignalProcessor, referred to as DSP) panel realizes, DSP panel is measured and is obtained above-mentioned three-phase voltage phase shifter input side three-phase mains voltage, above-mentioned three-phase voltage phase shifter outlet side three-phase voltage, electric current, i.e. amount to 9 road signals, this 9 road signal is after signal converter converts, in being controlled plate by DSP, above-mentioned 9 road signals are sampled by analog digital conversion (AnalogDigitalTransfer, referred to as AD).
For the ease of user according to the no-load voltage ratio of the above-mentioned pressure regulator of status adjustment of three-phase electricity phase shift, in the preferred embodiment, the above-mentioned three-phase voltage phase shifter also includes: display unit, be connected to above-mentioned control parts, be used for showing at least one information: the electric current of above-mentioned compensator transformer outfan, above-mentioned compensator transformer regulation after voltage superposes the voltage that obtains with the Voltage Series of above-mentioned three phase mains, overlapped in series obtains voltage and the voltage of above-mentioned three phase mains between phase contrast.
Preferably, as shown in Figure 3, above-mentioned display unit can use display to control interface and realize, the phase contrast between in real time the voltage after the regulation of the display electric current of above-mentioned compensator transformer outfan, above-mentioned compensator transformer superposes the voltage that obtains with the Voltage Series of above-mentioned three phase mains, overlapped in series obtains voltage and the voltage of above-mentioned three phase mains.
Actively regulate the no-load voltage ratio of above-mentioned pressure regulator for the ease of user, in the preferred embodiment, the above-mentioned three-phase voltage phase shifter also includes: input block, poor for inputting the preset phase between voltage and the voltage of above-mentioned three phase mains that overlapped in series obtains；Above-mentioned control parts, are additionally operable to produce control command according to above-mentioned preset phase difference, and wherein, above-mentioned control command is for regulating the no-load voltage ratio of above-mentioned pressure regulator.
Preferably, as shown in Figure 3, the function of above-mentioned input block can use display to control interface and realize, i.e. show that control interface includes keyboard, user can arrange, by keyboard, the angle (being equivalent to above-mentioned preset phase poor) that the preset phase between voltage and the voltage of above-mentioned three phase mains that input overlapped in series obtains is poor, DSP panel generates control instruction according to the preset phase difference of input, and control instruction is sent to electronic automatic coupling voltage regulator, regulate the no-load voltage ratio of electronic automatic coupling voltage regulator, and then realize automatic Regulation, phase shift, when the output voltage phase place of above-mentioned three-phase voltage phase shifter moves to preset value, electronic automatic coupling voltage regulator stops pressure regulation.
In order to improve the safety of above-mentioned three-phase voltage phase shifter, in the preferred embodiment, as it is shown on figure 3, the above-mentioned three-phase voltage phase shifter also includes: at least one: fuse, it is connected on the three-phase firewire of three-phase voltage phase shifter inputs；Air switch, is connected on the three-phase firewire of above-mentioned three-phase voltage phase shifter inputs；A.C. contactor, is connected on the three-phase firewire of above-mentioned three-phase voltage phase shifter outfan.
Preferably, the parts in the above-mentioned three-phase voltage phase shifter can carry out unifying to optimize design according to principles such as heat radiation, mechanical strength, wiring, electromagnetic interference, strong and weak electricity isolation.
Preferably, the connecting line within the above-mentioned three-phase voltage phase shifter to improve the output capacity of above-mentioned three-phase voltage phase shifter, can solve the problem that common phase shifter output is little as desired to overstriking.
In the preferred embodiment, it is provided that a kind of method of three-phase voltage phase shift, as shown in Figure 4, the method for this three-phase voltage phase shift includes that step S402 is to step S406.
Step S402: regulated the phase place of the voltage of compensator transformer by three-phase isolation transformer according to the no-load voltage ratio of pressure regulator, wherein, first connection end of three-phase isolation transformer is connected to compensator transformer, and the second connection end of three-phase isolation transformer is connected to the first connection end of pressure regulator；
Step S404: regulated the amplitude of the voltage of compensator transformer according to the no-load voltage ratio of pressure regulator by pressure regulator, wherein, the second connection end of pressure regulator is connected to compensator transformer；
Step S406: by compensator transformer by the regulation of compensator transformer the voltage of phase and amplitude superpose with the Voltage Series of three phase mains, wherein, the secondary of compensator transformer is connected on the three-phase firewire of three phase mains.
Amplitude and phase place in order to realize the voltage to above-mentioned compensator transformer are adjusted, and in the preferred embodiment, the secondary of above-mentioned compensator transformer includes: centre tap, and above-mentioned centre tap is connected to the former limit in the first connection end of above-mentioned three-phase isolation transformer；First connection end of above-mentioned pressure regulator includes: former limit, and above-mentioned former limit is connected to the secondary in the second connection end of above-mentioned three-phase isolation transformer；Second connection end of above-mentioned pressure regulator includes: outfan, above-mentioned outfan is connected to the former limit of above-mentioned compensator transformer.
The result of three-phase electricity phase shift is checked for the ease of user, in the preferred embodiment, the method for above-mentioned three-phase voltage phase shift also includes: gather at least one parameter: the voltage of above-mentioned three phase mains, above-mentioned compensator transformer regulation after voltage superpose voltage, the electric current of above-mentioned compensator transformer outfan obtained with the Voltage Series of above-mentioned three phase mains；Parameter according to gathering shows at least one information: the electric current of above-mentioned compensator transformer outfan, above-mentioned compensator transformer regulation after voltage superposes the voltage that obtains with the Voltage Series of above-mentioned three phase mains, overlapped in series obtains voltage and the voltage of above-mentioned three phase mains between phase contrast.
For the ease of user according to the no-load voltage ratio of the above-mentioned pressure regulator of status adjustment of three-phase electricity phase shift, in the preferred embodiment, the method for above-mentioned three-phase voltage phase shift also includes: the preset phase between voltage and the voltage of above-mentioned three phase mains that input overlapped in series obtains is poor；Producing control command according to above-mentioned preset phase difference, wherein, above-mentioned control command is for regulating the no-load voltage ratio of above-mentioned pressure regulator.
From above description, can be seen that, above preferred embodiment achieves following technique effect: be connected to compensator transformer by the first connection end of three-phase isolation transformer, second connection end of above-mentioned three-phase isolation transformer is connected to the first connection end of pressure regulator, and above-mentioned three-phase isolation transformer for regulating the phase place of the voltage of above-mentioned compensator transformer according to the no-load voltage ratio of above-mentioned pressure regulator；Second connection end of above-mentioned pressure regulator is connected to above-mentioned compensator transformer, and above-mentioned pressure regulator for regulating the amplitude of the voltage of above-mentioned compensator transformer according to the no-load voltage ratio of above-mentioned pressure regulator；The secondary of above-mentioned compensator transformer is connected on the three-phase firewire of three phase mains, for by the regulation of above-mentioned compensator transformer the voltage of phase and amplitude fold with the Voltage Series of above-mentioned three phase mains, achieve the no-load voltage ratio that can regulate above-mentioned pressure regulator according to different demands, and then amplitude and the phase place of the voltage of above-mentioned compensator transformer is regulated according to the no-load voltage ratio after regulation, the voltage of the voltage and three phase mains that regulated amplitude and phase place is carried out overlapped in series by above-mentioned compensator transformer, realize the purpose of the three-phase electricity phase shift to three phase mains, when the no-load voltage ratio of above-mentioned regulation pressure regulator, can realize the precision of phase shift during three-phase electricity phase shift and the scope of phase shift are adjusted, such that it is able to meet the demand of different application scene.
Obviously, those skilled in the art should be understood that, each module of the above-mentioned present invention or each step can realize with general calculating device, they can concentrate on single calculating device, or it is distributed on the network that multiple calculating device is formed, alternatively, they can realize with calculating the executable program code of device, thus, can be stored in storing in device and be performed by calculating device, and in some cases, can be to be different from the step shown or described by order execution herein, or they are fabricated to respectively each integrated circuit modules, or the multiple modules in them or step are fabricated to single integrated circuit module realize.So, the present invention is not restricted to the combination of any specific hardware and software.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (10)
1. a three-phase voltage phase shifter, it is characterised in that including:
Three-phase isolation transformer, first connection end of described three-phase isolation transformer is connected to compensator transformer, second connection end of described three-phase isolation transformer is connected to the first connection end of pressure regulator, for regulating the phase place of the voltage of described compensator transformer according to the no-load voltage ratio of described pressure regulator；
Described pressure regulator, the second connection end of described pressure regulator is connected to described compensator transformer, for regulating the amplitude of the voltage of described compensator transformer according to the no-load voltage ratio of described pressure regulator；
Described compensator transformer, the secondary of described compensator transformer is connected on the three-phase firewire of three phase mains, for by the regulation of described compensator transformer the voltage of phase and amplitude superpose with the Voltage Series of described three phase mains.
The three-phase voltage phase shifter the most according to claim 1, it is characterised in that
The secondary of described compensator transformer includes: centre tap, and described centre tap is connected to the former limit in the first connection end of described three-phase isolation transformer；
First connection end of described pressure regulator includes: former limit, and described former limit is connected to the secondary in the second connection end of described three-phase isolation transformer；
Second connection end of described pressure regulator includes: outfan, described outfan is connected to the former limit of described compensator transformer.
The three-phase voltage phase shifter the most according to claim 1 and 2, it is characterised in that also include:
Control parts, at least one parameter is sampled:
The voltage of described three phase mains, described compensator transformer regulation after voltage superpose voltage, the electric current of described compensator transformer outfan obtained with the Voltage Series of described three phase mains.
The three-phase voltage phase shifter the most according to claim 3, it is characterised in that also include:
Display unit, is connected to described control parts, is used for showing at least one information:
The electric current of described compensator transformer outfan, described compensator transformer regulation after voltage superposes the voltage that obtains with the Voltage Series of described three phase mains, overlapped in series obtains voltage and the voltage of described three phase mains between phase contrast.
The three-phase voltage phase shifter the most according to claim 3, it is characterised in that also include:
Input block, poor for inputting the preset phase between voltage and the voltage of described three phase mains that overlapped in series obtains；
Described control parts, are additionally operable to produce control command according to described preset phase difference, and wherein, described control command is for regulating the no-load voltage ratio of described pressure regulator.
6. according to the three-phase voltage phase shifter according to any one of claim 1 to 2 and 4 to 5, it is characterised in that also include: at least one:
Fuse, is connected on the three-phase firewire of three-phase voltage phase shifter inputs；
Air switch, is connected on the three-phase firewire of described three-phase voltage phase shifter inputs；
A.C. contactor, is connected on the three-phase firewire of described three-phase voltage phase shifter outfan.
7. the method for a three-phase voltage phase shift, it is characterised in that including:
Regulated the phase place of the voltage of compensator transformer according to the no-load voltage ratio of pressure regulator by three-phase isolation transformer, wherein, first connection end of described three-phase isolation transformer is connected to described compensator transformer, and the second connection end of described three-phase isolation transformer is connected to the first connection end of described pressure regulator；
Regulated the amplitude of the voltage of described compensator transformer according to the no-load voltage ratio of described pressure regulator by described pressure regulator, wherein, the second connection end of described pressure regulator is connected to described compensator transformer；
By described compensator transformer by the regulation of described compensator transformer the voltage of phase and amplitude superpose with the Voltage Series of three phase mains, wherein, the secondary of described compensator transformer is connected on the three-phase firewire of three phase mains.
Method the most according to claim 7, it is characterised in that
The secondary of described compensator transformer includes: centre tap, and described centre tap is connected to the former limit in the first connection end of described three-phase isolation transformer；
First connection end of described pressure regulator includes: former limit, and described former limit is connected to the secondary in the second connection end of described three-phase isolation transformer；
Second connection end of described pressure regulator includes: outfan, described outfan is connected to the former limit of described compensator transformer.
9. according to the method described in claim 7 or 8, it is characterised in that described method also includes:
Gather at least one parameter:
The voltage of described three phase mains, described compensator transformer regulation after voltage superpose voltage, the electric current of described compensator transformer outfan obtained with the Voltage Series of described three phase mains；
Parameter according to gathering shows at least one information:
The electric current of described compensator transformer outfan, described compensator transformer regulation after voltage superposes the voltage that obtains with the Voltage Series of described three phase mains, overlapped in series obtains voltage and the voltage of described three phase mains between phase contrast.
10. according to the method described in claim 7 or 8, it is characterised in that described method also includes:
Preset phase between voltage and the voltage of described three phase mains that input overlapped in series obtains is poor；
Producing control command according to described preset phase difference, wherein, described control command is for regulating the no-load voltage ratio of described pressure regulator.
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| US10033086B2 (en) | 2014-11-10 | 2018-07-24 | Commscope Technologies Llc | Tilt adapter for diplexed antenna with semi-independent tilt |
| EP3125366B1 (en) * | 2015-07-29 | 2020-02-19 | CommScope Technologies LLC | Tilt adapter for diplexed antenna with semi-independent tilt |
| CN108680853B (en) * | 2018-04-03 | 2020-09-04 | 广州嘉能自动化设备有限公司 | Motor aging test method and device by using phase-shifting power supply |
| CN111308397B (en) * | 2020-02-26 | 2022-03-29 | 广东电网有限责任公司 | Method for verifying connection group state of three-phase transformer |
| CN112924830A (en) * | 2021-03-04 | 2021-06-08 | 国网山西省电力公司电力科学研究院 | Transformer three-phase partial discharge simultaneous pressurization test device and test method based on single-phase variable frequency power supply |
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