CN105811774B - A kind of DC/DC converters output control method - Google Patents
A kind of DC/DC converters output control method Download PDFInfo
- Publication number
- CN105811774B CN105811774B CN201610057776.6A CN201610057776A CN105811774B CN 105811774 B CN105811774 B CN 105811774B CN 201610057776 A CN201610057776 A CN 201610057776A CN 105811774 B CN105811774 B CN 105811774B
- Authority
- CN
- China
- Prior art keywords
- power
- output
- power module
- control unit
- given
- 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.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of DC/DC converters output control methods, master control unit obtains the output general power of DC/DC converters, each required power of power module is calculated according to output general power, the control unit of modules is according to the modular power received, output voltage is adjusted, while output current is adjusted by adjusting output voltage；The output power of module control unit real-time computing module in adjustment process.The present invention may be implemented multimode and arbitrarily combine, and can reach equal stream mode after random parallel connection, ensure the reliability flowed.
Description
Technical field
The present invention relates to a kind of DC/DC converters output control methods.
Background technology
First row hydrogen fuel tramcar is offline within 2014.Fuel cell has energy transformation ratio high, and fuel is diversified, ring
The small, low noise of border pollution, it is highly reliable, maintainability is good the advantages that.Due to the electric output characteristic of fuel battery engines it is softer with
And the needs in view of Full Vehicle System control, high power D C/DC converters are one of its essential key components and parts；How
Hydrogen fuel DC-DC is designed, the normal operation of fuel cell pile and Full Vehicle System is not only related to, but also is related to entire
The reliable and stable operation of the power performance, efficiency of energy utilization and other control system of fuel cell tramcar.
High power D C/DC used at present is mainly using using the power supply of single large power supply and multiple small-power modules
Parallel opertation is powered, and single large power supply power supply mainly has the disadvantage that：
1. power supply breaks down, whole system cisco unity malfunction；
2. small-power work limitation rate is low；
3. modularized design can not be carried out, when for different output powers, needing to redesign.
There are many schemes of multiple wired in parallel outputs, but modules external characteristics in parallel is difficult completely the same.Due to
The factors such as the limitation of inevitable property and technological level of error participate in modules in parallel in real system, they are each other
Parameter all can some difference, this difference is only possible to reduce as possible, can not possibly but avoid completely, in addition, the ginseng of modules
Number（Such as：Output voltage, electric current）It can also change with the variation of the environmental factors such as time and temperature, this environmental factors
The difference of caused intermodule parameter may be bigger than the difference of module inherently it is more.Then, if directly simultaneously by module
Connection, since modules external characteristics is inconsistent, the module that voltage regulation factor is small, external characteristics is good undertakes that electric current is more or even mistake
It carries；And the module of certain external characteristics differences runs on underloading, or even substantially zero load.Its result certainly will be that share current is excessive
Module, thermal stress become larger, and the probability of damage rises, reliability decrease.
Invention content
The technical problem to be solved by the present invention is in view of the shortcomings of the prior art, provide a kind of DC/DC converters output control
Method processed.
In order to solve the above technical problems, the technical solution adopted in the present invention is：A kind of DC/DC converters output controlling party
Method includes the following steps：
1）Master control unit obtains the output general power of DC/DC converters, if the output general power of master control unit acquisition/
The rated power of N≤30%* power modules, then master control list reduces the number for the power module for participating in work, until master control list
The rated power for output general power/N ＞ 30%* power modules that member obtains, enters step 2）；Otherwise, it is directly entered step 2）；N
For the number of power module；
2）The given power of each power module of DC/DC converters, master control list are calculated according to the output general power
The given power for each power module for participating in work is sent to the control unit of each power module by member；Wherein, work is participated in
The given power of each power module=output general power/M, M are the number for the power module for participating in work；
3）Participate in control unit the opening according to given each power module switching tube of power regulation of each power module of work
Logical and shutdown, to adjust the output voltage and output current of each power module, until the output voltage of each power module × defeated
Go out electric current=given power.
Step 2）Specific implementation process include：The control unit for participating in each power module of work judges each power module
Output voltage whether reach given voltage, if not up to, the control unit of each power module adjusts corresponding work(
The output voltage of rate module, until each power module output voltage=given voltage, while judging the output of each power module at this time
Whether voltage × output current is equal to given power, if it is not, then master control unit increase given voltage, to constant current and send to
The control unit of each power module, the control unit of each power module is according to the given voltage of master control unit and gives constant current tune
The output voltage and output current of each power module are saved, each power module output voltage after the adjusting of master control unit judges × defeated
Go out whether electric current is equal to given power；If equal, power module always works under the given power rating；If each power mould
Block output voltage × module output current is less than given power, then repeats above-mentioned adjustment process；If each power module output voltage
× output current is more than given power, then after power module output current reaches given output current, output current is further added by,
Master control unit control output voltage is begun to decline so that each power module output voltage × output current is equal to given power.
Compared with prior art, the advantageous effect of present invention is that：The present invention may be implemented multimode and arbitrarily combine,
It can reach equal stream mode after random parallel connection, ensure the reliability flowed.It can also only allow one in the case that low power simultaneously
Or several module work, improve the working efficiency of converter.
Description of the drawings
Fig. 1 is module circuit schematic；
Fig. 2 is DC/DC transformer configuration block diagrams.
Specific implementation mode
Master control unit obtains total power, and the required power of modules is calculated according to total power meter, will be each
The power conversion of module is sent to modules at Current Voltage value.The control unit of modules is according to the electricity of master control unit
Flow valuve carries out Current limited Control.Inside modules are controlled using double be closed.Outer shroud is controlled using Voltage loop, and inner ring uses electric current loop control
System.First Voltage loop works, when reaching the given current value of master control unit（The total current of acquisition/N (N：Of parallel module
Number)）Afterwards, electric current loop works, and ensures power limitation control.If each module reach given current value after, electric current is again
Increase, voltage begins to glide, and output current does not reach given cut-off current and obtains module because of output voltage height, and current value increases automatically
Add.The power for being automatically adjusted to modules is consistent.If the output general power that master control unit obtains DC/DC converters is smaller
（The gross output of acquisition/N≤30%* power module rated power）, of the power module of master control list reduction participation work
Number reduces the power attenuation under no-load condition, improves total delivery efficiency.After one of module breaks down, other moulds
Block work is unaffected, and the mutual switch operating of modules can also be controlled in the case of small-power, increases the reliability of system.
Embodiment
If hydrogen fuel cell internal parallel, because the output voltage of 2 hydrogen fuel cells cannot be guaranteed that unanimously, 2 can be caused
A hydrogen fuel cell output current is unbalanced, may lead to a module overcurrent.Use is seriously affected after hydrogen fuel cell overcurrent
Service life.According to the data that hydrogen fuel cell producer provides, hydrogen fuel service life is：12000hrs, if often overcurrent uses,
Service life is：2000hrs.
Hydrogen fuel DC-DC overall design demanded power output 200kW, using 4 wired in parallel, each specified work(of module design
50 kW of rate.Existing power device IGBT, rectifier diode cause the switching frequency of module not high, and isolating transformer volume is big,
Weight weight.The switching frequency that module can be improved using multiple modules reduces total volume and weight.Switching frequency can reach
15-20kHz.The output general power of hydrogen fuel DC-DC can be according to the requirement real-time change of traction and auxiliary system.According to the present invention
Method, control wherein 2 modules export in rated power, and efficiency can reach 93% during total power.
Claims (1)
1. a kind of DC/DC converters output control method, which is characterized in that include the following steps：
1）Master control unit obtains the output general power of DC/DC converters, if output general power/N of master control unit acquisition≤
The rated power of 30%* power modules, then master control unit reduces the number for the power module for participating in work, until master control list
The rated power for output general power/N ＞ 30%* power modules that member obtains, enters step 2）；Otherwise, it is directly entered step 2）；N
For the number of power module；
2）The given power for each power module that work is participated in DC/DC converters is calculated according to the output general power,
The given power for each power module for participating in work is sent to the control unit of each power module by master control unit；Wherein, join
With the number that given power=output general power/M of each power module of work, M are the power module for participating in work；
3）Participate in work each power module control unit according to give each power module switching tube of power regulation open with
Shutdown, to adjust the output voltage and output current of each power module, until the output voltage of each power module × output electricity
Stream=given power：Specific implementation process includes：The control unit for participating in each power module of work judges the defeated of each power module
Go out the voltage whether voltage reaches given, if not up to, the control unit of each power module adjusts corresponding power mould
The output voltage of block, until each power module output voltage=given voltage, while judging the output voltage of each power module at this time
Whether × output current is equal to given power, if it is not, then master control unit increases given voltage, to constant current and sends to each work(
The control unit of the control unit of rate module, each power module is each according to the given voltage of master control unit and given current regulation
The output voltage and output current of power module, each power module output voltage × output after master control unit judges are adjusted are electric
Whether stream is equal to given power；If equal, power module always works under the given power rating；If each power module is defeated
Go out voltage × module output current and be less than given power, then repeats above-mentioned adjustment process；If each power module output voltage × defeated
Go out electric current and be more than given power, then after power module output current reaches given output current, when output current is further added by, always
Control unit control output voltage is begun to decline so that each power module output voltage × output current is equal to given power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610057776.6A CN105811774B (en) | 2016-01-28 | 2016-01-28 | A kind of DC/DC converters output control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610057776.6A CN105811774B (en) | 2016-01-28 | 2016-01-28 | A kind of DC/DC converters output control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105811774A CN105811774A (en) | 2016-07-27 |
| CN105811774B true CN105811774B (en) | 2018-08-24 |
Family
ID=56466363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610057776.6A Active CN105811774B (en) | 2016-01-28 | 2016-01-28 | A kind of DC/DC converters output control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105811774B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110385995A (en) * | 2019-07-30 | 2019-10-29 | 深圳市英威腾电气股份有限公司 | A kind of control circuit and control method of Hydrogen Fuel-cell Vehicles dcdc converter |
| CN112448562B (en) * | 2019-08-30 | 2022-05-13 | 比亚迪股份有限公司 | DC-DC converter and control method thereof |
| CN112583251B (en) * | 2019-09-30 | 2023-08-08 | 比亚迪股份有限公司 | Train, bidirectional DC-DC converter, control method, device and system thereof |
| CN112994212B (en) * | 2019-12-02 | 2023-05-19 | 科华恒盛股份有限公司 | Power regulation method of electrical equipment |
| CN112751359A (en) * | 2020-12-31 | 2021-05-04 | 江苏延长桑莱特新能源有限公司 | Multi-module parallel operation power generation system of hydrogen fuel cell and control method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895774A (en) * | 2015-06-09 | 2015-09-09 | 合肥聚能新能源科技有限公司 | Control method of photovoltaic pump clustering system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202160116U (en) * | 2011-06-22 | 2012-03-07 | 辽宁荣信众腾科技有限公司 | Novel power unit used in light DC transmission equipment |
| CN203504439U (en) * | 2013-08-20 | 2014-03-26 | 东莞市力与源电器设备有限公司 | Large-power reversing pulse power supply |
| US9584029B2 (en) * | 2014-06-02 | 2017-02-28 | Utah State University | Multi-mode control for a DC-to-DC converter |
| CN104393618A (en) * | 2014-11-21 | 2015-03-04 | 南车株洲电力机车研究所有限公司 | Multi-inversion-unit parallel connection based photovoltaic inverter control method |
| CN105871183B (en) * | 2015-01-19 | 2019-04-12 | 台达电子工业股份有限公司 | Hyperbaric medicine power supply device and its control method |
| CN104578803A (en) * | 2015-02-04 | 2015-04-29 | 荣信电力电子股份有限公司 | High-voltage direct current-direct current power electronic transformer |
-
2016
- 2016-01-28 CN CN201610057776.6A patent/CN105811774B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895774A (en) * | 2015-06-09 | 2015-09-09 | 合肥聚能新能源科技有限公司 | Control method of photovoltaic pump clustering system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105811774A (en) | 2016-07-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105811774B (en) | A kind of DC/DC converters output control method | |
| CN103545905B (en) | A kind of photovoltaic direct-current micro-grid energy coordination control method | |
| CN102822508B (en) | Wind turbine controller applying differential pole control algorithm | |
| CN101814768A (en) | Fuel cell based standby power system | |
| KR20170118285A (en) | System and method ofoperating variable voltage for DC micro-grid | |
| CN114336678B (en) | PMU-based primary frequency modulation control method for wind-solar energy storage station | |
| CN105914788A (en) | Photovoltaic grid-connected inverter low-voltage ride-through control system | |
| CN103618308B (en) | The alternating current circuit trend autocontrol method of a kind of interchange transmission system in parallel with flexible direct current | |
| CN107910877A (en) | Shunt capacitor switching control method during a kind of sending end current conversion station high power fluctuation | |
| CN113113912B (en) | Multi-mode cooperative control method and system for four-port energy router | |
| CN110854881A (en) | Method for participating in primary frequency modulation by combining energy storage and photovoltaic rapid control | |
| CN113097995B (en) | Alternating current/direct current hybrid power distribution network optimization operation method considering multiple time scales | |
| CN209055600U (en) | Charging pile energy-saving aging device and charging system | |
| CN104104104A (en) | Method of automatic switching between power generation mode and SVG mode for photovoltaic inverter | |
| CN114465224A (en) | LCC and MMC coordinated control strategy suitable for direct-current power distribution network | |
| Xu et al. | Discussion on the factors affecting the stability of microgrid based on distributed power supply | |
| CN207764330U (en) | It is a kind of that the fully loaded test system of frequency converter is realized using SVG | |
| CN113725852A (en) | Electricity utilization control method and system for fuel cell testing laboratory | |
| CN107612035A (en) | A kind of raising photovoltaic generation based on addition interconnection switch structure collects the method for system light-load efficiency | |
| CN204334379U (en) | The V/f-with hysteretic characteristic falls down vertical microgrid inverter power supply | |
| CN113221358A (en) | Standby output optimization method of electric-gas coupling system based on reliability parameters | |
| CN203456906U (en) | Energy-saving apparatus based on storage battery charge and discharge system | |
| CN203399048U (en) | An optical electrical complementation AC frequency-variable generating and speed-regulating energy-saving device | |
| Naidu et al. | A unified distributed control strategy for dc microgrid with hybrid energy storage devices | |
| Zhan et al. | Coordinating Operation and Control Strategy for the Integrated Wind-Storage VSC-MTDC System |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |