CN102801321A - High-efficiency wide voltage range bidirectional charging and discharging device control method - Google Patents
High-efficiency wide voltage range bidirectional charging and discharging device control method Download PDFInfo
- Publication number
- CN102801321A CN102801321A CN2012102308107A CN201210230810A CN102801321A CN 102801321 A CN102801321 A CN 102801321A CN 2012102308107 A CN2012102308107 A CN 2012102308107A CN 201210230810 A CN201210230810 A CN 201210230810A CN 102801321 A CN102801321 A CN 102801321A
- Authority
- CN
- China
- Prior art keywords
- output
- angle
- duty ratio
- integrator
- scope
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Dc-Dc Converters (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a high-efficiency wide voltage range bidirectional charging and discharging device control method, which comprises the following steps: (1) adjusting the size of an output angle according to the output power or a set value or a feedback value of the current, wherein when the absolute value of the angle output is greater than the upper limit of the angle, an integrator starts positive integration output to be increased by D, in a similar way, when the absolute value of the angle output is smaller than the lower limit of the angle, the negative integration of the integrator is reduced by D; (2) determining to change the duty ratio on which side of an H bridge of a transformer according to the ratio of the voltage on direct current side of the primary and secondary sides, changing the secondary duty ratio D2 of the transformer, and limiting the duty ratio D2, otherwise changing a primary duty ratio D1 of the transformer, and limiting the duty ratio D1 in the range; and (3) combining steps (1) and (2), and limiting the duty ratio D obtained in step (1) in the range obtained in step (2). The two control modes are combined, the soft switching in the full-load range can be realized, the power can be output to the greatest degree, and the utilization rate of the device is improved.
Description
Technical field:
The invention belongs to electricity field, relate to a kind of two-way charge and discharge device control method, the two-way charge and discharge device control method of especially a kind of efficient wide-voltage range.
Background technology:
Present employing Fig. 1 sort circuit mainly contains two kinds of control modes: pure phase shifting control (Only phase shift control) and phase shift add duty ratio control (Phase shift and duty ratio control) two kinds of control modes.
KHERALUWALA; M H has introduced the principle of pure phase shifting control (Only phase shift control) in detail at article " PERFORMANCE CHARACTERIZATION OF A HIGH-POWER DUAL ACTIVE BRIDGE DC-TO-DC-CONVERTER ": this method mainly is the break-make of control chart 1 former limit and secondary H bridge switch pipe; Form at the transformation two ends positive and negative square-wave signal (as shown in Figure 2, u '
2Be the waveform of secondary voltage equivalence to the former limit of transformer, U
1Be the former limit of transformer dc voltage, U '
2For the voltage of transformer secondary dc voltage equivalence, have to the former limit of transformer
), through moving the phase place on both sides, realize the two-way flow of power.
Adopt power and the variation relation of angle of the control method transmission of pure phase shifting control to be:
But have only when the phase shift angle satisfies (0.2) and (0.3) simultaneously:
With
The time could realize the soft switch of both sides H bridge.That is to say; When the absolute value of phase shift angle
was smaller, the efficient that adopts this control mode device was very low.
Tao, H mention in article " Transformer-coupled multiport ZVS bidirectional DC-DC converter with wdde input range " and have introduced phase shift and add duty ratio control (Phase shift and duty ratiocontrol).This control method mainly is the switching tube of control transformer side, realizes waveform as shown in Figure 3 (D is defined as duty ratio) in the transformer side:
Work as U
1≤U '
2The time, the duty ratio of control transformer secondary makes
As shown in Figure 4:
Work as U
1>U '
2The time, the duty ratio on the former limit of control transformer makes
Through such control method, can be so that under the situation of what phase shift angle in office, whole device can both be realized the soft switch in the full-load range.With U
1≤U '
2Be example, the through-put power that obtains this control method is along with the situation of phase shift angle transformation is:
Contrast equation (0.1) and (0.6) can be known, can realize the soft switch in the full-load range though adopt phase shift to add duty ratio control, and the maximum power of transmission has but reduced.Adopt the maximum power of pure phase shifting control (Only phase shift control) transmission big, but be not that soft switch causes efficient low under the small-power situation; And adopting phase shift to add duty ratio control (Phase shift and duty ratiocontrol) though can realize the soft switch of full-load range, the maximum power of transmission but has restriction.Fig. 5 is an example with
, the situation that the power of the two kinds of control method transmission of having drawn changes along with phase shift angle φ.
Summary of the invention:
The objective of the invention is to overcome the shortcoming of above-mentioned prior art; Provide a kind of efficient wide-voltage range two-way charge and discharge device control method; Above these two kinds of control modes are combined; Can realize the soft switch in the full-load range, also power output has at utmost increased the utilance of device.
The objective of the invention is to solve through following technical scheme:
The two-way charge and discharge device control method of a kind of efficient wide-voltage range, according to following steps:
The size of (1) regulating the output angle according to the set-point and the value of feedback of power output or electric current; After angle output absolute value was greater than the angle upper limit
, integrator began the output of forward integration and increases D; In like manner; After the absolute value of angle output was less than angle lower limit
, integrator negative sense integration reduced D;
(2) according to the ratio of former secondary dc voltage
Size decide the duty ratio that changes which side of transformer H bridge: if
Then change the duty ratio D of transformer secondary output
2, simultaneously it is limited in
In like manner if
Then change the duty ratio D of primary
1, it is limited in
In the scope;
(3) integrating step (1) and step (2) are in the resulting scope of duty ratio D conditioning step (2) that step (1) is obtained.
Said step (1) is: after angle output absolute value is greater than the angle upper limit
; Input integral device as a result, integrator begin the output of forward integration and increase D; After the absolute value of angle output is less than angle lower limit
; Input integral device as a result, integrator negative sense integration reduces D; Other situation integrator output initial values D.
Said step (2) is: calculating
is also judged its size; If the scope that
then changes output duty cycle is at interval
in like manner, if
just
then the scope of output duty cycle is limited in the interval
.
Said step (3) is: the scope that integrating step (1) and step (2) obtain, limit final duty ratio output.If the scope that step (2) obtains is
Then with primary duty cycle D
1=D, and with D
1Be limited in the interval
If the scope that step (2) obtains is
Then make secondary duty ratio D
2=D, and with D
2Be limited in the interval
The inventive method has been used in the 12kVA charge and discharge device, and is very big if adopt pure phase shifting control then to install circulation in this device, even can't under low-pressure state, discharge and recharge; But if just adopt phase shift to add duty ratio control, little electric current discharges and recharges can be more steady, but can't export big electric current.Adopt the inventive method, can realize that high efficiency the discharging and recharging also of little electric current can realize discharging and recharging under the current state, and charging process is steady.
Description of drawings:
Fig. 1 discharges and recharges main circuit topology figure for bidirectional, dc DCDC;
Fig. 2 is the former secondary voltage oscillogram of pure phase shifting control transformer;
Fig. 3 is duty ratio control waveform figure;
Fig. 4 controls former secondary voltage oscillogram for phase shift adds duty ratio;
Fig. 5 is that two kinds of control mode through-put powers are along with phase shift angle situation of change figure;
Fig. 6 is a practical implementation block diagram of the present invention;
Fig. 7 encircles control logic figure for the present invention stagnates;
Fig. 8 is a flow chart of the present invention;
Fig. 9 is a charging current oscillogram under the 7V electric pressure.
Wherein: N
1Be the primary number of turn; N
2Be the transformer secondary output number of turn;
Be transformer voltage ratio; L is the total leakage inductance of primary; F is the operating frequency of switching tube; ω is a switching tube operating angle frequency, and ω=2 π f are arranged; U
1Be transformer primary direct voltage amplitude; U
2Be transformer secondary direct voltage amplitude; U'
1For the amplitude of transformer primary direct voltage equivalence, have to primary side
U '
2For the amplitude of transformer secondary direct voltage equivalence, have to primary side
T
sSwitch periods for switching tube; D is a duty ratio, and being defined as voltage waveform is positive time and the ratio of 1/2 switch periods, wherein 0<D≤1; D
1Be the primary voltage duty cycle; D
2Be the transformer-secondary voltage duty ratio;
Be the phase shift angle, former secondary voltage waveform phase is poor;
For adopting the phase shift angle lower threshold of this method;
For adopting the phase shift angle upper limit threshold of this method; P is the power of device output; P
BaseBe reference power, be defined as
P
uPerunit value for the device through-put power is defined as
Embodiment:
Below in conjunction with accompanying drawing the present invention is done and to describe in further detail:
Referring to Fig. 6, Fig. 7, Fig. 8 and Fig. 9, can see that from Fig. 6 several core of the present invention is respectively: ask absolute value, the chain rate that stagnates and integrator control.Can find out from formula (0.6); In the time of phase shift angle
; Adopt phase shift to add the duty specific energy and realize soft switch, adopt when phase shift angle
time pure phase shifting control and phase shift to add duty ratio and control and all can realize soft switch.Defines two angles
and
making
The stagnant ring control module of Fig. 6, its internal logic control block diagram is as shown in Figure 7:
When output phase shift angle
After, integrator Integrator begins the forward integration; When output phase shift angle
The time, integrator Integrator begins the negative sense integration, and the export-restriction of integrator is existed
When the phase shift angle
Absolute value less than
The time, guaranteed that duty ratio output just has been controlled at
Have only when the output angle
After, D
2Beginning slowly increases (being up to 1); Equally, when the user reduces the instruction of power output (perhaps electric current), also have only
After, the duty Bizet can slowly change to
Whole like this process has promptly realized soft switch, has also increased the upper limit of through-put power.The implementing procedure figure of entire method is as shown in Figure 8:
Of the present invention can being used in the two-way systems that discharge and recharge of various needs such as photovoltaic generation, wind power generation, energy storage device PCS (Power Conversion System), fuel cell, electric automobile.(the charging/discharging voltage scope is [V with my company's one cover charge and discharge device
1, V
2], and V
1<V
2) be example, implementation process of the present invention is described:
At first, through a three-phase PFC (power factor correction) line voltage is stabilized in 650V.
Then, transformer voltage ratio is designed to 650:V
2, like this at V
2Simple phase shift just can realize soft switch in the gamut under the electric pressure, and is not V at voltage
2The time, just can just can realize through the duty ratio that only changes elementary H bridge FR in soft switch.
Secondly, through voltage Hall sampling secondary-side voltage, when detecting voltage less than V
2The time, the H bridge duty ratio that can adopt the inventive method to regulate primary realizes FR soft switch.
At last, if power and current-order change greatly, then also can adopt this to realize that pure phase shifting control and phase shift add the flexible switching of duty ratio control.
Channel oscilloscope one is V among Fig. 9
1The waveform of following charging current (electric current during duty ratio begin to increase) to 150A.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction; Though the present invention discloses as above with preferred embodiment; Yet be not in order to limiting the present invention, anyly be familiar with the professional and technical personnel, in not breaking away from technical scheme scope of the present invention; When the method for above-mentioned announcement capable of using and technology contents are made a little change or be modified to the equivalent embodiment of equivalent variations; In every case be the content that does not break away from technical scheme of the present invention, to any simple modification, equivalent variations and modification that above embodiment did, still belong in the scope of technical scheme of the present invention according to technical spirit of the present invention.
Claims (4)
1. the two-way charge and discharge device control method of efficient wide-voltage range is characterized in that, according to following steps:
The size of (1) regulating the output angle according to the set-point and the value of feedback of power output or electric current; After angle output absolute value was greater than the angle upper limit
, integrator began the output of forward integration and increases D; In like manner; After the absolute value of angle output was less than angle lower limit
, integrator negative sense integration reduced D;
(2) according to the ratio of former secondary dc voltage
Size decide the duty ratio that changes which side of transformer H bridge: if
Then change the duty ratio D of transformer secondary output
2, simultaneously it is limited in
In like manner if
Then change the duty ratio D of primary
1, it is limited in
In the scope;
(3) integrating step (1) and step (2), the duty ratio D that step (1) is obtained is limited in the resulting scope of step (2).
2. the two-way charge and discharge device control method of a kind of according to claim 1 efficient wide-voltage range is characterized in that:
Said step (1) is: after angle output absolute value is greater than the angle upper limit
; Input integral device as a result, integrator begin the output of forward integration and increase D; After the absolute value of angle output is less than angle lower limit
; Input integral device as a result, integrator negative sense integration reduces D; After angle output absolute value equals the angle upper limit
; Input integral device as a result, integrator output initial value D.
3. the two-way charge and discharge device control method of a kind of according to claim 1 efficient wide-voltage range is characterized in that:
4. the two-way charge and discharge device control method of a kind of according to claim 1 efficient wide-voltage range is characterized in that:
Said step (3) is: the scope that integrating step (1) and step (2) obtain, limit final duty ratio output; If the scope that step (2) obtains is
Then with primary duty cycle D
1=D, and with D
1Be limited in the interval
If the scope that step (2) obtains is
Then make secondary duty ratio D
2=D, and with D
2Be limited in the interval
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201210230810.7A CN102801321B (en) | 2012-07-30 | 2012-07-30 | High-efficiency wide voltage range bidirectional charging and discharging device control method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201210230810.7A CN102801321B (en) | 2012-07-30 | 2012-07-30 | High-efficiency wide voltage range bidirectional charging and discharging device control method |
Publications (2)
Publication Number | Publication Date |
---|---|
CN102801321A true CN102801321A (en) | 2012-11-28 |
CN102801321B CN102801321B (en) | 2014-11-05 |
Family
ID=47200318
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201210230810.7A Active CN102801321B (en) | 2012-07-30 | 2012-07-30 | High-efficiency wide voltage range bidirectional charging and discharging device control method |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN102801321B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103187879A (en) * | 2013-04-23 | 2013-07-03 | 盐城工学院 | Bidirectional direct current converter based on immittance network, and digital control system and method of bidirectional direct current converter |
CN104836274A (en) * | 2015-03-31 | 2015-08-12 | 北京交通大学 | Wide-voltage-range high-efficiency high-frequency isolated battery charge-discharge circuit and control method thereof |
CN105406720A (en) * | 2015-12-17 | 2016-03-16 | 艾思玛新能源技术(上海)有限公司苏州高新区分公司 | Control method based on cascade bidirectional DC-DC converter |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001211645A (en) * | 2000-01-25 | 2001-08-03 | Hitachi Ltd | Direct-current power supply |
CN102185533A (en) * | 2011-05-23 | 2011-09-14 | 北京交通大学 | Stored energy type standard-Z source photovoltaic power generation control system and method |
-
2012
- 2012-07-30 CN CN201210230810.7A patent/CN102801321B/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001211645A (en) * | 2000-01-25 | 2001-08-03 | Hitachi Ltd | Direct-current power supply |
CN102185533A (en) * | 2011-05-23 | 2011-09-14 | 北京交通大学 | Stored energy type standard-Z source photovoltaic power generation control system and method |
Non-Patent Citations (2)
Title |
---|
HAIMIN TAO等: "Transformer-coupled multiport ZVS bidirectional DC-DC converter with wdde input range", 《POWER ELECTRONICS, IEEE TRANSACTIONS ON》 * |
KHERALUWALA, M.N.等: "Performance characterization of a high-power dual active bridge DC-to-DC converter", 《INDUSTRY APPLICATIONS, IEEE TRANSACTIONS ON》 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103187879A (en) * | 2013-04-23 | 2013-07-03 | 盐城工学院 | Bidirectional direct current converter based on immittance network, and digital control system and method of bidirectional direct current converter |
CN104836274A (en) * | 2015-03-31 | 2015-08-12 | 北京交通大学 | Wide-voltage-range high-efficiency high-frequency isolated battery charge-discharge circuit and control method thereof |
CN104836274B (en) * | 2015-03-31 | 2017-03-29 | 北京交通大学 | Wide-voltage range high efficiency high-frequency isolation battery charge-discharge circuit and its control method |
CN105406720A (en) * | 2015-12-17 | 2016-03-16 | 艾思玛新能源技术(上海)有限公司苏州高新区分公司 | Control method based on cascade bidirectional DC-DC converter |
Also Published As
Publication number | Publication date |
---|---|
CN102801321B (en) | 2014-11-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Zhang et al. | PWM plus secondary-side phase-shift controlled soft-switching full-bridge three-port converter for renewable power systems | |
CN109889047B (en) | Two-stage DC-DC converter suitable for wide input and output voltage range | |
Ding et al. | A novel soft-switching multiport bidirectional DC–DC converter for hybrid energy storage system | |
CN106549577B (en) | Non-isolated two-way high-gain DC/DC converter and method for controlling frequency conversion | |
Park et al. | Design and control of a bidirectional resonant dc–dc converter for automotive engine/battery hybrid power generators | |
CN104506040B (en) | Dual-PWM and phase-shifting control method with the same duty ratio | |
CN105305829B (en) | The unidirectional DC DC converters of current mode and symmetric double PWM add phase-shifting control method | |
CN201869102U (en) | DC/DC changer of photovoltaic high-frequency isolating boosting soft switch | |
Feng et al. | A novel dual-phase-shift control strategy for dual-active-bridge DC-DC converter | |
CN103427462B (en) | A kind of bank of super capacitors charging circuit with electric voltage equalization ability | |
CN201365204Y (en) | Single-stage and single-phase AC-DC converter based on LLC series resonance | |
CN102005928A (en) | Photovoltaic high-frequency isolation boost soft switch DC/DC converter and control method thereof | |
CN103647329A (en) | Two-stage equalizing charging system and application thereof | |
CN105281576A (en) | Quasi-resonant half-bridge converter and control method thereof | |
CN111231730B (en) | Charging and discharging control method and system for charging pile | |
CN111431415B (en) | High-boost isolated DC converter with parallel input and series output | |
CN108512430A (en) | A kind of three Port Translation device of ZVZCS full-bridges and its control method | |
CN103731039A (en) | Two-way direct current converter with high conversion efficiency | |
CN109149945B (en) | A kind of three port current transformers suitable for light storage direct-current grid | |
Xue et al. | A novel bi-directional DC-DC converter for distributed energy storage device | |
CN110829837B (en) | Low-voltage stress ZVS high-gain Boost converter | |
CN111342664A (en) | Integrated DC-DC converter and control method thereof | |
CN102801321B (en) | High-efficiency wide voltage range bidirectional charging and discharging device control method | |
CN110601535A (en) | Preceding stage voltage stabilizer applicable to double-battery system and control method thereof | |
CN116470768B (en) | Control method of bidirectional full-bridge LLC converter for battery formation and composition |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant |