CN103856087A - Control method, device and system of single-phase four-quadrant rectifier output voltage - Google Patents
Control method, device and system of single-phase four-quadrant rectifier output voltage Download PDFInfo
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Abstract
The invention provides a control method, device and system of single-phase four-quadrant rectifier output voltage. The control method includes the following steps that: a difference value signal between output voltage of a single-phase four-quadrant rectifier and set reference voltage is obtained; voltage regulation and current regulation are respectively performed on the difference value signal, such that a regulated signal can be obtained; amplitude attenuation processing is performed on higher harmonic in the regulated signal, such that attenuated signal can be obtained; pulse width modulation (PWM) is performed on the attenuated signal, such that a modulated pulse signal can be obtained; and the modulated pulse signal is outputted to the single-phase four-quadrant rectifier so as to make the output voltage of the single-phase four-quadrant rectifier maintained in a preset range. According to the control method, device and system of the single-phase four-quadrant rectifier output voltage provided by the invention, the amplitude attenuation processing is performed on the higher harmonic in the signal, and therefore, the fluctuation of the output voltage of the single-phase four-quadrant rectifier can be decreased.
Description
Technical field
The present invention relates to signal controlling technology, relate in particular to a kind of control method, Apparatus and system of single-phase four-quadrant rectifier output voltage.
Background technology
It is most of in the railway system of China that what adopt is single-phase 25KV power supply mechanism, by contact line to locomotive power supply, through rail return current.Due to 25KV overtension, and only have single-phase, cannot be directly used in Electric Machine Control, so have a rectifying device on locomotive, because this rectifying device is single-phase, can work in four quadrants, the two-way flow of energy energy, can carry out energy feedback, so this rectifying device is called for short single-phase four-quadrant rectifier.Single-phase 25KV passes through single-phase four-quadrant rectifier again through transformer, can obtain a galvanic current and press, and this direct voltage is called intermediate voltage, and traction invertor and subordinate inverter are reverse into by this stable intermediate voltage the alternating voltage needing separately again.
The control method of existing single-phase four-quadrant rectifier output voltage, as shown in Figure 1, whole control outer shroud adopts Voltage loop control, and in whole control, ring adopts current loop control, referred to as the control of outer voltage current inner loop.Concrete, the given intermediate voltage Ur wanting, it is poor that intermediate voltage Ur and the actual intermediate voltage Udc detecting are done, difference signal is input to pi regulator to be regulated, according to the phase of the actual line voltage detecting, the signal after pi regulator regulates is regulated, obtain and the synchronous reference current Ir of line voltage, it is poor that reference current Ir and the actual power network current Iac detecting are done, difference signal is input to pulse width modulation (Pulse Width Modulation, being called for short PWM) modulator modulates, generating pwm pulse signal is input in single-phase four-quadrant rectifier.
But prior art exists following defect: what current loop control was considered is all first-harmonic (50Hz) composition, cause the output voltage fluctuation of single-phase four-quadrant rectifier larger.
Summary of the invention
The invention provides a kind of control method, Apparatus and system of single-phase four-quadrant rectifier output voltage, in order to solve the larger problem of voltage fluctuation of the single-phase four-quadrant rectifier output existing in prior art.
On the one hand, the invention provides a kind of control method of single-phase four-quadrant rectifier output voltage, comprising:
Obtain the output voltage of described single-phase four-quadrant rectifier and set the difference signal between reference voltage;
Successively described difference signal is carried out to voltage-regulation and electric current adjusting, adjusted signal;
High order harmonic component in described conditioning signal is carried out to amplitude attenuation processing, obtain deamplification;
Described deamplification is carried out to pulse duration PWM modulation, obtain modulated pulse signal;
Described modulated pulse signal is outputed in described single-phase four-quadrant rectifier, so that the output voltage of described single-phase four-quadrant rectifier remains on preset range.
On the other hand, the present invention also provides a kind of control device of single-phase four-quadrant rectifier output voltage, comprising:
Acquiring unit, for obtaining the output voltage of described single-phase four-quadrant rectifier and setting the difference signal between reference voltage;
Regulon, for carrying out voltage-regulation and electric current adjusting, adjusted signal to described difference signal successively;
Attenuation units, for the high order harmonic component of described conditioning signal is carried out to amplitude attenuation processing, obtains deamplification;
Modulating unit, for described deamplification being carried out to pulse duration PWM modulation, obtains modulated pulse signal;
Output unit, for described modulated pulse signal being outputed to described single-phase four-quadrant rectifier, so that the output voltage of described single-phase four-quadrant rectifier remains on preset range.
On the other hand, the present invention also provides a kind of control system of single-phase four-quadrant rectifier output voltage, comprising: the control device of single-phase four-quadrant rectifier and single-phase four-quadrant rectifier output voltage as above.
The control method of single-phase four-quadrant rectifier output voltage provided by the invention, Apparatus and system, carry out amplitude attenuation processing by the high order harmonic component in signal, reduce the impact of high order harmonic component on single-phase four-quadrant rectifier output voltage, thereby reduced the fluctuation of single-phase four-quadrant rectifier output voltage.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the control method of existing single-phase four-quadrant rectifier output voltage;
Fig. 2 is the schematic flow sheet of an embodiment of control method of single-phase four-quadrant rectifier output voltage provided by the invention;
Fig. 3 is the control system theory diagram that the equipment that relates in another embodiment of control method of single-phase four-quadrant rectifier output voltage provided by the invention forms;
Fig. 4 is the Byrd bode figure of inertial element transfer function;
Fig. 5 is the structural representation of an embodiment of control device of single-phase four-quadrant rectifier output voltage provided by the invention;
Fig. 6 is the structural representation of an embodiment of control system of single-phase four-quadrant rectifier output voltage provided by the invention;
Fig. 7 is a kind of schematic diagram of realizing scene of the control system of single-phase four-quadrant rectifier output voltage embodiment illustrated in fig. 6.
Embodiment
Below by specific embodiment and accompanying drawing, technical scheme of the present invention is described in further detail.
Fig. 2 is the schematic flow sheet of an embodiment of control method of single-phase four-quadrant rectifier output voltage provided by the invention.As shown in Figure 2, the method can comprise:
S201, obtains the output voltage of single-phase four-quadrant rectifier and sets the difference signal between reference voltage;
Concrete, can adopt the mode of closed-loop control (for example outer voltage current inner loop control) to realize the control to single-phase four-quadrant rectifier output voltage.Can set the desirable output voltage of single-phase four-quadrant rectifier as reference voltage, can pass through the actual output voltage of the single-phase four-quadrant rectifier of voltage sensor senses, it is poor that the reference voltage of setting and the actual output voltage detecting are done, and obtains difference signal.
S202, carries out voltage-regulation to difference signal successively and electric current regulates, adjusted signal;
Concrete, can adoption rate integral differential (Proportion Integration Differentiation, be called for short PID) regulate, proportional integral (Proportion Integration, be called for short PI) regulate, proportion differential (Proportion Differentiation, be called for short PD) regulate, self adaptation regulates and the mode such as robustness adjusting, and above-mentioned difference signal is carried out to voltage-regulation.The signal that voltage-regulation is obtained carries out electric current adjusting, adjusted signal again.
S203, carries out amplitude attenuation processing to the high order harmonic component in conditioning signal, obtains deamplification;
Above-mentioned voltage-regulation and electric current adjustment process, mainly for the first-harmonic composition in difference signal, and the existence of high order harmonic component composition makes the output voltage fluctuation of single-phase four-quadrant rectifier larger, therefore, in the present embodiment, can carry out amplitude attenuation processing to the high order harmonic component in above-mentioned conditioning signal, make the amplitude of first-harmonic composition in conditioning signal unattenuated, and the amplitude of high order harmonic component composition significantly decays, obtain deamplification.
S204, carries out pulse duration PWM modulation to deamplification, obtains modulated pulse signal;
Concrete, pulse duration PWM modulation can be isopulse width PWM modulation, random pulses width PWM modulation and Using Sinusoidal Pulse Width Modulation (Sinusoidal Pulse Width Modulation is called for short SPWM) etc.
S205, outputs to modulated pulse signal in single-phase four-quadrant rectifier, so that the output voltage of single-phase four-quadrant rectifier remains on preset range.
Concrete, for by insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, be called for short IGBT) composition single-phase four-quadrant rectifier, above-mentioned modulated pulse signal can be input to the gate pole of IGBT, the output voltage of controlling single-phase four-quadrant rectifier remains on the reference voltage left and right of setting, thereby obtains desirable output voltage.
The control method of the single-phase four-quadrant rectifier output voltage that the present embodiment provides, carry out amplitude attenuation processing by the high order harmonic component in signal, reduce the impact of high order harmonic component on single-phase four-quadrant rectifier output voltage, thereby reduced the fluctuation of single-phase four-quadrant rectifier output voltage.
Fig. 3 is the control system theory diagram that the equipment that relates in another embodiment of control method of single-phase four-quadrant rectifier output voltage provided by the invention forms.As shown in Figure 3, it is poor that the actual output voltage Udc of the reference voltage Ur of setting and single-phase four-quadrant rectifier is done, and obtains difference signal, difference signal carries out PI adjusting through proportion integral control device, carry out phase adjusted through multiplier again, be multiplied by the cosine value of electric network voltage phase φ, obtain the signal identical with electric network voltage phase, as reference current Ir, it is poor that the actual input current Iac of reference current Ir and single-phase four-quadrant rectifier is done, the difference signal obtaining is input to inertia governor as modulation signal and carries out inertia adjusting, be multiplied by the transfer function of inertial element, obtain the deamplification that high order harmonic component amplitude significantly decays, deamplification is modulated through pulse duration PWM modulator, the modulated pulse signal obtaining is input in single-phase four-quadrant rectifier, so that the output voltage U dc of single-phase four-quadrant rectifier remains on the reference voltage Ur left and right of setting, thereby obtain desirable output voltage.
In the present embodiment, above-mentioned step S203 in embodiment illustrated in fig. 2, is specifically as follows:
By A=C*B, conditioning signal is carried out to attenuation processing, obtain deamplification, wherein, A is deamplification, C is transfer function
b is conditioning signal.
Concrete, for making the amplitude of first-harmonic composition in signal unattenuated, and the amplitude of high order harmonic component composition significantly decays, and can above-mentioned conditioning signal be decayed by an inertial element, and the transfer function of inertial element is
(wherein τ is time parameter, and according to base wave frequency, 50Hz arranges), multiplies each other by above-mentioned conditioning signal and this transfer function, obtains deamplification.Fig. 4 is the Byrd bode figure of inertial element transfer function, as shown in Figure 4, abscissa is frequency Frequency, ordinate is amplitude gain Gain, as shown in Figure 4, this inertial element is 1 in the amplitude multiplication factor at first-harmonic 50Hz place, is 0.3801 in the amplitude multiplication factor at 100Hz place, and this explanation inertial element has good attenuation to more than 2 times and 2 times high order harmonic component signals.
In the present embodiment, above-mentioned step S202 in embodiment illustrated in fig. 2, is specifically as follows:
Adoption rate integral PI control method carries out voltage-regulation to difference signal;
Signal voltage-regulation being obtained according to electric network voltage phase carries out phase adjusted, obtains the signal identical with electric network voltage phase as reference current;
Concrete, can pass through voltage sensor senses line voltage, if electric network voltage phase is φ, the signal times voltage-regulation being obtained, with the cosine value COS φ of electric network voltage phase, obtains the signal identical with electric network voltage phase, as reference current.
Difference signal between the input current of single-phase four-quadrant rectifier and reference current is as conditioning signal.
Concrete, can detect by current sensor the actual input current of single-phase four-quadrant rectifier, it is poor that said reference electric current and the actual input current detecting are done, and the difference signal obtaining is as modulation signal.
The control method of the single-phase four-quadrant rectifier output voltage that the present embodiment provides, carry out amplitude attenuation processing by the high order harmonic component in signal, reduce the impact of high order harmonic component on single-phase four-quadrant rectifier output voltage, thereby reduced the fluctuation of single-phase four-quadrant rectifier output voltage.
Fig. 5 is the structural representation of an embodiment of control device of single-phase four-quadrant rectifier output voltage provided by the invention.As shown in Figure 5, this device can comprise:
Acquiring unit 51, for obtaining the output voltage of single-phase four-quadrant rectifier and setting the difference signal between reference voltage;
Modulating unit 54, for deamplification being carried out to pulse duration PWM modulation, obtains modulated pulse signal;
Wherein, attenuation units 53 specifically can be for:
By A=C*B, conditioning signal is carried out to attenuation processing, obtain deamplification, wherein, A is deamplification, C is transfer function
b is conditioning signal.
Adoption rate integral PI control method carries out voltage-regulation to difference signal; Signal voltage-regulation being obtained according to electric network voltage phase carries out phase adjusted, obtains the signal identical with electric network voltage phase as reference current; Difference signal between the input current of single-phase four-quadrant rectifier and reference current is as conditioning signal.
The control device of the single-phase four-quadrant rectifier output voltage that the present embodiment provides is specifically as follows a hardware circuit or a programmable Digital Signal Processing (Digital Signal Processing is called for short DSP) arithmetic processor.
The control device of the single-phase four-quadrant rectifier output voltage that the present embodiment provides, by attenuation units 53, the high order harmonic component in signal is carried out to amplitude attenuation processing, reduce the impact of high order harmonic component on single-phase four-quadrant rectifier output voltage, thereby reduced the fluctuation of single-phase four-quadrant rectifier output voltage.
Fig. 6 is the structural representation of an embodiment of control system of single-phase four-quadrant rectifier output voltage provided by the invention.As shown in Figure 6, this system can comprise:
The control device 62 of single-phase four-quadrant rectifier 61 and single-phase four-quadrant rectifier output voltage as above.
Wherein, single-phase four-quadrant rectifier 61 is specifically as follows the single-phase four-quadrant rectifier being made up of four IGBT, the control device 62 of single-phase four-quadrant rectifier output voltage is specifically as follows a hardware circuit or a programmable Digital Signal Processing (Digital Signal Processing is called for short DSP) arithmetic processor.
Further, this system can also comprise:
Current detecting unit 64, for detection of the input current of single-phase four-quadrant rectifier, and inputs to input current the control device of single-phase four-quadrant rectifier output voltage.
Wherein, voltage detection unit 63 is specifically as follows existing voltage sensor etc., and current detecting unit 64 is specifically as follows existing current sensor etc.
Fig. 7 is a kind of schematic diagram of realizing scene of the control system of single-phase four-quadrant rectifier output voltage embodiment illustrated in fig. 6.This is realized in scene, and the control device 62 of single-phase four-quadrant rectifier output voltage is take programmable DSP arithmetic processor as example, and voltage detection unit 63 and current detecting unit 64 are respectively take voltage sensor and current sensor as example.
As shown in Figure 7, by the control system of single-phase four-quadrant rectifier output voltage in train auxiliary electrical system, the single-phase 25KV alternating current of line voltage is input to the gate pole of the single-phase four-quadrant rectifier being made up of four IGBT after transformer, and then carry out filtering through capacitor C, obtain stable intermediate voltage, traction invertor or subordinate inverter are reverse into by this stable intermediate voltage the alternating voltage needing separately again and are input in motor, realize traction control and power supply to train.
Wherein, the control system of single-phase four-quadrant rectifier output voltage, except the single-phase four-quadrant rectifier being made up of four IGBT, also comprises two voltage sensors, a current sensor and a programmable DSP arithmetic processor.Concrete control flow is as follows:
The reference voltage of setting is inputed to DSP arithmetic processor by host computer, and the actual output voltage of the single-phase four-quadrant rectifier detecting is also inputed to DSP arithmetic processor by right side voltage sensor.It is poor that DSP arithmetic processor does the reference voltage of setting and actual output voltage, obtains difference signal; Then successively difference signal is carried out to voltage-regulation and electric current adjusting, adjusted signal, in voltage-regulation and electric current adjustment process, left side voltage sensor is used for detection of grid voltage, and current sensor is used for detecting the actual input current of single-phase four-quadrant rectifier; Then the high order harmonic component in conditioning signal is carried out to amplitude attenuation processing, obtain deamplification; Then deamplification is carried out to PWM modulation, obtain modulated pulse signal; Finally modulated pulse signal is outputed to the gate pole of single-phase four-quadrant rectifier, so that the output voltage of single-phase four-quadrant rectifier remains on the reference voltage left and right of setting, obtain desirable intermediate voltage.
The control system of the single-phase four-quadrant rectifier output voltage that the present embodiment provides, by the control device 62 of single-phase four-quadrant rectifier output voltage, high order harmonic component in signal is carried out to amplitude attenuation processing, reduce the impact of high order harmonic component on single-phase four-quadrant rectifier output voltage, thereby reduced the fluctuation of single-phase four-quadrant rectifier output voltage; Reduce the reactive power of system simultaneously, improved the whole efficiency of system.
Finally it should be noted that: above each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a control method for single-phase four-quadrant rectifier output voltage, is characterized in that, comprising:
Obtain the output voltage of described single-phase four-quadrant rectifier and set the difference signal between reference voltage;
Successively described difference signal is carried out to voltage-regulation and electric current adjusting, adjusted signal;
High order harmonic component in described conditioning signal is carried out to amplitude attenuation processing, obtain deamplification;
Described deamplification is carried out to pulse duration PWM modulation, obtain modulated pulse signal;
Described modulated pulse signal is outputed in described single-phase four-quadrant rectifier, so that the output voltage of described single-phase four-quadrant rectifier remains on preset range.
2. method according to claim 1, is characterized in that, described high order harmonic component in described conditioning signal is carried out to amplitude attenuation processing, obtains deamplification, is specially:
By A=C*B, described conditioning signal is carried out to attenuation processing, obtain described deamplification, wherein, described A is described deamplification, described C is transfer function
described B is described conditioning signal.
3. method according to claim 1 and 2, is characterized in that, described described difference signal is carried out to voltage-regulation, comprising:
Adoption rate integral PI control method carries out voltage-regulation to described difference signal.
4. method according to claim 3, is characterized in that, described described difference signal is carried out to electric current adjusting, comprising:
The signal described voltage-regulation being obtained according to electric network voltage phase carries out phase adjusted, obtains the signal identical with described electric network voltage phase as reference current;
Difference signal between the input current of described single-phase four-quadrant rectifier and described reference current is as described conditioning signal.
5. a control device for single-phase four-quadrant rectifier output voltage, is characterized in that, comprising:
Acquiring unit, for obtaining the output voltage of described single-phase four-quadrant rectifier and setting the difference signal between reference voltage;
Regulon, for carrying out voltage-regulation and electric current adjusting, adjusted signal to described difference signal successively;
Attenuation units, for the high order harmonic component of described conditioning signal is carried out to amplitude attenuation processing, obtains deamplification;
Modulating unit, for described deamplification being carried out to pulse duration PWM modulation, obtains modulated pulse signal;
Output unit, for described modulated pulse signal being outputed to described single-phase four-quadrant rectifier, so that the output voltage of described single-phase four-quadrant rectifier remains on preset range.
6. device according to claim 5, is characterized in that, described attenuation units specifically for: by A=C*B, described conditioning signal is carried out to attenuation processing, obtain described deamplification, wherein, described A is described deamplification, and described C is transfer function
described B is described conditioning signal.
7. according to the device described in claim 5 or 6, it is characterized in that, described regulon also for:
Adoption rate integral PI control method carries out voltage-regulation to described difference signal.
8. device according to claim 7, is characterized in that, described regulon also for:
The signal described voltage-regulation being obtained according to electric network voltage phase carries out phase adjusted, obtains the signal identical with described electric network voltage phase as reference current;
Difference signal between the input current of described single-phase four-quadrant rectifier and described reference current is as described conditioning signal.
9. a control system for single-phase four-quadrant rectifier output voltage, is characterized in that, comprising: the control device of single-phase four-quadrant rectifier and the single-phase four-quadrant rectifier output voltage as described in claim 5-8 any one.
10. system according to claim 9, is characterized in that, also comprises:
Voltage detection unit, for detection of output voltage and the line voltage of described single-phase four-quadrant rectifier, and inputs to described output voltage and described line voltage the control device of described single-phase four-quadrant rectifier output voltage;
Current detecting unit, for detection of the input current of described single-phase four-quadrant rectifier, and inputs to described input current the control device of described single-phase four-quadrant rectifier output voltage.
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| CN111162664A (en) * | 2018-11-08 | 2020-05-15 | 中车永济电机有限公司 | Current bias suppression method and equipment for direct-drive permanent magnet electric locomotive converter |
| CN113014126A (en) * | 2019-12-19 | 2021-06-22 | 中车大连电力牵引研发中心有限公司 | Control method, device and equipment of four-quadrant rectifier and storage medium |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106208820A (en) * | 2016-09-11 | 2016-12-07 | 长沙中坤电气科技股份有限公司 | A kind of high-performance inverter with single-phase asynchronous motor soft start function |
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| CN111162664A (en) * | 2018-11-08 | 2020-05-15 | 中车永济电机有限公司 | Current bias suppression method and equipment for direct-drive permanent magnet electric locomotive converter |
| CN111162664B (en) * | 2018-11-08 | 2021-08-03 | 中车永济电机有限公司 | Current bias suppression method and equipment for direct-drive permanent magnet electric locomotive converter |
| CN113014126A (en) * | 2019-12-19 | 2021-06-22 | 中车大连电力牵引研发中心有限公司 | Control method, device and equipment of four-quadrant rectifier and storage medium |
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Application publication date: 20140611 |