CN202616774U - Simple DC power supply current-sharing parallel system - Google Patents
Simple DC power supply current-sharing parallel system Download PDFInfo
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- CN202616774U CN202616774U CN 201220182512 CN201220182512U CN202616774U CN 202616774 U CN202616774 U CN 202616774U CN 201220182512 CN201220182512 CN 201220182512 CN 201220182512 U CN201220182512 U CN 201220182512U CN 202616774 U CN202616774 U CN 202616774U
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Abstract
The utility model relates to a simple DC (Direct Current) power supply current-sharing parallel system, comprising a monitoring system and n DC power supply modules (n >= 2); wherein, the monitoring system is connected with all the DC power supply modules. According to the simple DC power supply current-sharing parallel system of the utility model, by performing corresponding control operations for output parameters of the each DC power supply module and set operating parameters, the each DC power supply module outputs according to needs and realizes current sharing. The simple DC power supply current-sharing parallel system of the utility model can be directly applied in the system in which the plurality of DC power supply modules are connected in parallel, and has the advantages of simple process, little wiring, beneficial maintenance, simple operation, and reliable control.
Description
Technical field
The utility model relates to the control technology of high-power DC power supply, is specifically related to high-power many DC power suppliers current-sharing parallel system.
Background technology
At present, increase in the increasing demand of the various large power supplies of many industries, especially the demand of some high-power DC power supplies.But; The DC power supplier finite capacity often adopts the multimode parallel running, and its output energy is the several times of module output; Improved the power grade of DC power supply; The multimode parallel operation makes system have certain redundancy simultaneously, and module failure can not influence the operate as normal of this system, makes the reliability of whole system that large increase arranged.The multimode parallel running not only makes DC power supply have bigger power and reliability, but also has good versatility, and flexible combination becomes the system of various power as required.But most of high-power DC power supply of multimode parallel running at present all adopts the hard parallel operation pattern of constant current; Be difficult to realize the requirement of constant voltage mode; Though having the part power-supply system to adopt supervisory control system is that main principal and subordinate's control system has realized constant voltage mode; But its circuit and circuit design are all very complicated, and installation and maintenance are all very difficult.
The utility model content
The utility model has proposed a kind of simple and easy DC power supply current-sharing parallel system in order to solve the problem of existing high-power DC power supply parallel operation.The utility model can directly apply to the DC power supply of existing multimode parallel connection, and its algorithm is simple, wiring is few, be beneficial to maintenance, and supervisory control system adopts a simple single-chip microcomputer or DSP to realize, and is simple to operate, and control is reliable.
The utility model is achieved through following proposal:
A kind of simple and easy DC power supply current-sharing parallel system comprises a supervisory control system and n DC power supplier, n >=2; Said supervisory control system is connected with each DC power supplier; Said supervisory control system comprises human-computer interaction device, MCU processor circuit, count pulse drive circuit, DC power supplier output current feedback circuit, DC power system voltage feedback circuit and blocks current given circuit, is used for controlling the output of each DC power supplier and realizing current-sharing according to the output parameter of each DC power supplier and the running parameter of human-computer interaction device's setting; Said MCU processor circuit links with human-computer interaction device, count pulse drive circuit, DC power supplier output current feedback circuit, DC power system voltage feedback circuit, blocks current given circuit respectively; Said human-computer interaction device is made up of display and keyboard, is used for showing and being provided with running parameter; Said count pulse drive circuit is isolated processing and amplifying to the pulse that the MCU processor circuit produces; Said blocks current given circuit obtains the control command of MCU processor circuit, to alignment the operating current of each DC power supplier is sent to each DC power supplier through blocks current.
Said DC power supplier has the given interface of electric current, output current feedback interface, DC power supply current-sharing parallel system, main power circuit and control circuit; Said control circuit is connected with the given interface of electric current, output current feedback interface, DC power supply current-sharing parallel system, main power circuit respectively; Said output current feedback interface also is connected with main power circuit; Said DC power supply current-sharing parallel system also is connected with the output current feedback interface; Said blocks current links together the given interface of electric current of all DC power suppliers and the blocks current given circuit of supervisory control system to alignment.
The given interface of the electric current of said DC power supplier is connected for alignment through blocks current with the blocks current given circuit of supervisory control system; The output current feedback interface of DC power supplier is connected with the DC power supplier output current feedback circuit of supervisory control system through the blocks current feedback line; The DC power supply current-sharing parallel system of DC power supplier is connected with the count pulse drive circuit of supervisory control system through the count pulse line; The fixed frequency direct current square-wave pulse that said count pulse line is used for that supervisory control system count pulse drive circuit is sent is transferred to the DC power supply current-sharing parallel system of each DC power supplier; Said blocks current feedback line is used for the DC power supplier output current feedback circuit of the output current feedback interface of all DC power suppliers and supervisory control system is linked together.
The DC power supply current-sharing parallel system of said DC power supplier comprises counting treatment circuit, count pulse width comparison circuit and output current feedback control circuit; Said counting treatment circuit is connected with count pulse line, count pulse width comparison circuit, output current feedback control circuit respectively; The pulse that said counting treatment circuit produces the count pulse drive circuit of the supervisory control system counting that make progress, and timesharing is controlled the output current feedback control circuit feedback current of self DC power supplier is connected on the blocks current feedback line; Said count pulse width comparison circuit also is connected with the count pulse line, and the pulse duration during to carry compares; Said output current feedback control circuit also is connected with the output current feedback interface.
The control circuit of said DC power supplier is connected with counting treatment circuit, count pulse width comparison circuit, the output current feedback control circuit of self DC power supply current-sharing parallel system respectively.The ground wire of said supervisory control system and all DC power suppliers links together.
Said output parameter comprises more than one in output current, output voltage, the power output.
The control method of above-mentioned simple and easy DC power supply current-sharing parallel system comprises: said simple and easy DC power supply current-sharing parallel system comprises n DC power supplier, and i DC power supplier used U
iExpression, 2≤i≤N, i are through the initial prewired circuit setting of the counting treatment circuit of DC power supplier, and the voltage that each DC power supplier is corresponding is V
i, each DC power supplier current corresponding is I
iThe control computing cycle of each DC power supplier is T
u, the count pulse clock cycle of supervisory control system is T
m, control cycle is T
x=nT
m, n is the DC power supplier number;
When DC power supply current-sharing parallel system worked in constant current mode, the output current that DC power supply current-sharing parallel system is set on the human-computer interaction device was I
G, the MCU processor circuit of supervisory control system is with T
xBe the cycle output pulse sequence, each pulse period is T
mWhen the timing treatment circuit of certain DC power supplier is wherein received pulse and counting upwards; The counting treatment circuit makes the work of output current feedback control circuit when producing carry; The output current feedback signal of this DC power supplier is transferred on the blocks current feedback line; The DC power supplier output current feedback circuit collection of supervisory control system appears at the output current of this DC power supplier on the blocks current feedback line and preserves, and count pulse width comparison circuit comparison pulse duration is to determine whether this DC power supplier works simultaneously; So at a T
xIn cycle, the output current feedback signal I that the DC power supplier output current feedback circuit of supervisory control system can each DC power supplier of acquisition time
iThe MCU processor circuit is to the output current feedback signal summation of each DC power supplier of collection
, and with the output current I that is provided with
GCarry out the PID computing, obtain the operating current I that each DC power supplier should be exported
Ug, the blocks current given circuit is with I
UgSend the given interface of electric current of each DC power supplier to alignment through blocks current; The control circuit of each DC power supplier is at one-period T
xInterior with I
UgBe the operating current of main power circuit, with T
uFor the control computing cycle, control main power circuit output current I
Ug
When DC power supply current-sharing parallel system works in constant voltage mode; The DC power system voltage feedback circuit of supervisory control system is directly gathered the voltage feedback signal of DC power supply current-sharing parallel system; The MCU processor circuit is done PID (Proportion Integration Differentiation) computing with the operating voltage that itself and human-computer interaction device are provided with, and obtains the operating current I of each DC power supplier
Ug, the blocks current given circuit sends the given interface of electric current of each DC power supplier through blocks current to alignment, and the control circuit of each DC power supplier is with I
UgControlling DC power supplier for the operating current of DC power supplier is operated under the constant current mode; DC power supply current-sharing this moment parallel system is operated in constant voltage mode, and the DC power supplier output current feedback circuit of supervisory control system is monitored the output current I of each DC power supplier in real time
i, to monitor the operating state of each DC power supplier.
In the above-mentioned control method, the running parameter that on the human-computer interaction device, is provided with starts several DC power suppliers, output voltage and output current defeated comprising.
With respect to present DC power supply parallel system and control method thereof, the beneficial effect of the utility model is:
1, has good versatility and ease for operation,, add that counting treatment circuit and pulsewidth comparison circuit can directly use for present most of DC power supplier parallel system.
2, system has only 4 to connect holding wire, if the parallel circuits of DC power supplier adopts Single-chip Controlling, connects holding wire and has only 3, and connecting line is few, installation and maintenance are simple.
3, DC power supply parallel system control circuit is simple and practical, and reliability is high.
Description of drawings
Fig. 1 is the simple and easy DC power supply current-sharing parallel system block diagram of embodiment.
Fig. 2 is the supervisory control system structural representation of embodiment.
Fig. 3 is the structural representation of the DC power supplier of embodiment.
Embodiment
Below in conjunction with specific embodiment the utility model is further specified.
Fig. 1 is the simple and easy DC power supply current-sharing parallel system block diagram of embodiment, comprises a supervisory control system and n DC power supplier, n >=2; Said supervisory control system is connected with each DC power supplier, and the ground wire 104 of said supervisory control system and all DC power suppliers links together.Be illustrated in figure 2 as the supervisory control system structural representation of embodiment; Said supervisory control system comprises human-computer interaction device, MCU processor circuit, count pulse drive circuit, DC power supplier output current feedback circuit, DC power system voltage feedback circuit, blocks current given circuit; Be used to monitor the output parameter of each DC power supplier; Through doing the control corresponding computing, make each DC power supplier export and realize current-sharing as required with the running parameter that is provided with; Said MCU processor circuit is human-computer interaction device, count pulse drive circuit, DC power supplier output current feedback circuit, DC power system voltage feedback circuit, the link of blocks current given circuit respectively.
Be illustrated in figure 3 as the structural representation of the DC power supplier of embodiment, said DC power supplier has the given interface of electric current, output current feedback interface, DC power supply current-sharing parallel system, main power circuit, control circuit; Said control circuit is connected with the given interface of electric current, output current feedback interface, DC power supply current-sharing parallel system, main power circuit respectively; Said output current feedback interface also is connected with main power circuit; Said DC power supply current-sharing parallel system also is connected with the output current feedback interface; Said human-computer interaction device is made up of display and keyboard, is used for showing and being provided with running parameter, like output voltage, electric current, power, start and close DC power supplier; Said count pulse drive circuit is isolated processing and amplifying to the pulse that the MCU processor circuit produces; Said blocks current given circuit obtains the control command of MCU processor circuit, to alignment the operating current of each DC power supplier is sent to the given interface of electric current of each DC power supplier through blocks current.The given interface of the electric current of DC power supplier is connected for alignment 103 through blocks current with the blocks current given circuit of supervisory control system; The output current feedback interface of DC power supplier is connected with the DC power supplier output current feedback circuit of supervisory control system through blocks current feedback line 101; The DC power supply current-sharing parallel system of DC power supplier is connected with the count pulse drive circuit of supervisory control system through count pulse line 102.The DC power supply current-sharing parallel system of DC power supplier comprises counting treatment circuit, count pulse width comparison circuit, output current feedback control circuit; Said counting treatment circuit is connected with count pulse line 102, count pulse width comparison circuit, output current feedback control circuit respectively; The pulse that said counting treatment circuit produces the count pulse drive circuit of the supervisory control system counting that makes progress;, counter produces carry pulse when overflowing; Control output current feedback control circuit is connected to the feedback current of self DC power supplier on the blocks current feedback line 101; And the zero clearing counter, make counter from zero count; Said count pulse width comparison circuit also is connected with count pulse line 102; Pulse duration during to carry compares; When pulse duration during greater than the set point of this DC power supplier; To start corresponding DC power supplier, when pulse duration will be closed corresponding DC power supplier during less than the set point of this DC power supplier; Said output current feedback control circuit also is connected with the output current feedback interface.
The control circuit of DC power supplier is connected with counting treatment circuit, count pulse width comparison circuit, the output current feedback control circuit of self DC power supply current-sharing parallel system respectively.The counting treatment circuit also has the initial count prewired circuit; Preset value is for deducting the DC power supplier numbering with the DC power supplier sum; As long as guarantee that the prefabricated value of the initial count prewired circuit of each DC power supplier is different, the counting treatment circuit just can appear on the blocks current feedback line 101 the feedback current timesharing of each DC power supplier through the control count pulse.
It is core that the counting treatment circuit can adopt the gate circuit chip of the counter that normal tape presets; Count pulse width comparison circuit can be made up of 555 timer circuits; The output current feedback interface is controlled by analog switch; All circuit are all cheap, and occasion higher in some required precision or that interference is bigger can be isolated this partial circuit and module control circuit, even can adopt a simple single-chip microcomputer or PLD to replace entire circuit.
The control method of described simple and easy DC power supply current-sharing parallel system is following:
Said simple and easy DC power supply current-sharing parallel system comprises n DC power supplier, and i DC power supplier used U
iExpression, 2≤i≤N, i are through the initial prewired circuit setting of the counting treatment circuit of DC power supplier, and the voltage that each DC power supplier is corresponding is V
i, each DC power supplier current corresponding is I
iThe control computing cycle of each DC power supplier is T
u, the count pulse clock cycle of supervisory control system is T
m, control cycle is T
x=nT
m, n is the DC power supplier number;
Said DC power supply current-sharing parallel system works on power; Input working parameter on the human-computer interaction device (starts several DC power suppliers; Set output voltage, output current etc.); The count pulse drive circuit sends the DC power supply current-sharing parallel system of each DC power supplier to the count pulse isolation amplification of MCU processor circuit generation and through count pulse line 102; The counting treatment circuit of the DC power supply current-sharing parallel system counting that makes progress; Simultaneously count pulse width comparison circuit compares the pulse duration on the count pulse line 102, when pulse duration during greater than the set point of this DC power supplier, starts the DC power supplier of respective settings; The output current feedback control circuit control output current feedback interface of this self DC power supply current-sharing parallel system was transferred to the output current of this DC power supplier on the blocks current feedback line 101 after DC power supplier started; The DC power supply current-sharing parallel system of each DC power supplier occurs according to output current feedback signal timesharing on blocks current feedback line 101 of count pulse control self DC power supplier; The MCU processor circuit is captured in the output current of each DC power supplier that timesharing occurs on the blocks current feedback line 101 successively in each count pulse;
When DC power supply current-sharing parallel system works in constant current mode, suppose 1,2, No. 3 DC power supplier participation work, the output current that DC power supply current-sharing parallel system is set on the human-computer interaction device is I
G, the MCU processor circuit of supervisory control system is with T
xBe the cycle output pulse sequence, first three pulse duration is T in the sequence
On, n-3 the pulse duration in back is T
Off, each pulse period is T
m
, upwards counts the timing treatment circuit of No. 1 DC power supplier (preset value is n) when receiving first step-by-step counting; The counting treatment circuit makes the work of output current feedback control circuit when producing carry; The output current feedback signal of No. 1 DC power supplier is transferred on the blocks current feedback line 101; The DC power supplier output current feedback circuit collection of supervisory control system appears at the output current of No. 1 DC power supplier on the blocks current feedback line 101 and preserves, relatively No. 1 DC power supplier work of pulse duration startup of count pulse width comparison circuit simultaneously; 2, No. 3 DC power suppliers like this will be activated when second and the 3rd pulse, and other DC power suppliers are not activated; So at a T
xIn cycle, the output current feedback signal I that the DC power supplier output current feedback circuit of supervisory control system can each DC power supplier of acquisition time
iThe MCU processor circuit is to the output current feedback signal summation of each DC power supplier of collection
, and with the output current I that is provided with
GCarry out the PID computing, obtain the operating current I that each DC power supplier should be exported
Ug, the blocks current given circuit is with I
UgSend the given interface of electric current of each DC power supplier to for alignment 103 through blocks current; The control circuit of each DC power supplier is at one-period T
xInterior with I
UgBe the operating current of main power circuit, with T
uFor the control computing cycle, control main power circuit output current I
Ug
When DC power supply current-sharing parallel system works in constant voltage mode; The DC power system voltage feedback circuit of supervisory control system is directly gathered the voltage feedback signal of DC power supply current-sharing parallel system; The MCU processor circuit is done the PID computing with the operating voltage that itself and human-computer interaction device are provided with, and obtains the operating current I of each DC power supplier
Ug, the blocks current given circuit sends the given interface of electric current of each DC power supplier to for alignment 103 through blocks current, and the control circuit of each DC power supplier is with I
UgControlling DC power supplier for the operating current of DC power supplier is operated under the constant current mode; DC power supply current-sharing this moment parallel system is operated in constant voltage mode, and the DC power supplier output current feedback circuit of supervisory control system is monitored the output current I of each DC power supplier in real time
i, to monitor the operating state of each DC power supplier.
Simple and easy DC power supply current-sharing parallel system that the utility model provided and the constant voltage control model that control method is simple in structure, wiring less, has well solved parallel system; Can be applied directly to most of DC power supply parallel system, and control circuit is simple and reliable.
Specific embodiment described herein only is specifying the utility model spirit; Those skilled in the art can make various modifications to this specific embodiment or replenish or adopt similar mode to substitute under the prerequisite of the principle of the utility model and essence, but these change the protection range that all falls into the utility model.Therefore the utility model technical scope is not limited to the foregoing description.
Claims (7)
1. a simple and easy DC power supply current-sharing parallel system is characterized in that comprising a supervisory control system and n DC power supplier, n >=2; Said supervisory control system is connected with each DC power supplier; Said supervisory control system comprises human-computer interaction device, MCU processor circuit, count pulse drive circuit, DC power supplier output current feedback circuit, DC power system voltage feedback circuit and blocks current given circuit, and supervisory control system is used for according to the output of each DC power supplier of running parameter control of the output parameter of each DC power supplier and human-computer interaction device's setting and realizes current-sharing; Said MCU processor circuit links with human-computer interaction device, count pulse drive circuit, DC power supplier output current feedback circuit, DC power system voltage feedback circuit, blocks current given circuit respectively; Said human-computer interaction device is used for showing and being provided with running parameter; Said count pulse drive circuit is isolated processing and amplifying to the pulse that the MCU processor circuit produces; Said blocks current given circuit obtains the control command of MCU processor circuit, to alignment the operating current of each DC power supplier is sent to each DC power supplier through blocks current.
2. simple and easy DC power supply current-sharing parallel system according to claim 1 is characterized in that said DC power supplier has the given interface of electric current, output current feedback interface, DC power supply current-sharing parallel system, main power circuit and control circuit; Said control circuit is connected with the given interface of electric current, output current feedback interface, DC power supply current-sharing parallel system, main power circuit respectively; Said output current feedback interface also is connected with main power circuit; Said DC power supply current-sharing parallel system also is connected with the output current feedback interface; Said blocks current links together the given interface of electric current of all DC power suppliers and the blocks current given circuit of supervisory control system to alignment.
3. simple and easy DC power supply current-sharing parallel system according to claim 2 is characterized in that, the given interface of the electric current of said DC power supplier is connected for alignment through blocks current with the blocks current given circuit of supervisory control system; The output current feedback interface of DC power supplier is connected with the DC power supplier output current feedback circuit of supervisory control system through the blocks current feedback line; The DC power supply current-sharing parallel system of DC power supplier is connected with the count pulse drive circuit of supervisory control system through the count pulse line; The fixed frequency direct current square-wave pulse that said count pulse line is used for that supervisory control system count pulse drive circuit is sent is transferred to the DC power supply current-sharing parallel system of each DC power supplier; Said blocks current feedback line is used for the DC power supplier output current feedback circuit of the output current feedback interface of all DC power suppliers and supervisory control system is linked together.
4. simple and easy DC power supply current-sharing parallel system according to claim 2 is characterized in that, the DC power supply current-sharing parallel system of said DC power supplier comprises counting treatment circuit, count pulse width comparison circuit and output current feedback control circuit; Said counting treatment circuit is connected with count pulse line, count pulse width comparison circuit, output current feedback control circuit respectively; The pulse that said counting treatment circuit produces the count pulse drive circuit of the supervisory control system counting that make progress, and timesharing is controlled the output current feedback control circuit feedback current of self DC power supplier is connected on the blocks current feedback line; Said count pulse width comparison circuit also is connected with the count pulse line, and the pulse duration during to carry compares; Said output current feedback control circuit also is connected with the output current feedback interface.
5. simple and easy DC power supply current-sharing parallel system according to claim 4; It is characterized in that the control circuit of said DC power supplier is connected with counting treatment circuit, count pulse width comparison circuit, the output current feedback control circuit of self DC power supply current-sharing parallel system respectively.
6. simple and easy DC power supply current-sharing parallel system according to claim 1 is characterized in that, the ground wire of said supervisory control system and all DC power suppliers links together.
7. according to each described simple and easy DC power supply current-sharing parallel system of claim 1 ~ 6, it is characterized in that said human-computer interaction device is made up of display and keyboard.
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|---|---|---|---|
| CN 201220182512 CN202616774U (en) | 2012-04-26 | 2012-04-26 | Simple DC power supply current-sharing parallel system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220182512 CN202616774U (en) | 2012-04-26 | 2012-04-26 | Simple DC power supply current-sharing parallel system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102646978A (en) * | 2012-04-26 | 2012-08-22 | 华南理工大学 | Simple DC (direct current) power supply current equalization and parallel connection system of and control method of the system |
| CN105958469A (en) * | 2016-06-15 | 2016-09-21 | 厦门科灿信息技术有限公司 | Synchronization and current-sharing methods for programmable multi-machine parallel power supply system |
| CN106130000A (en) * | 2016-06-30 | 2016-11-16 | 温州大学 | Take into account the system ambiguous control method of parallel operation of efficiency and current-sharing index |
| CN106160017A (en) * | 2016-06-30 | 2016-11-23 | 温州大学 | Based on current-sharing deviation expected matrix row and minimum parallel operation system optimized control method |
-
2012
- 2012-04-26 CN CN 201220182512 patent/CN202616774U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102646978A (en) * | 2012-04-26 | 2012-08-22 | 华南理工大学 | Simple DC (direct current) power supply current equalization and parallel connection system of and control method of the system |
| CN102646978B (en) * | 2012-04-26 | 2015-01-28 | 华南理工大学 | Simple DC (direct current) power supply current equalization and parallel connection system of and control method of the system |
| CN105958469A (en) * | 2016-06-15 | 2016-09-21 | 厦门科灿信息技术有限公司 | Synchronization and current-sharing methods for programmable multi-machine parallel power supply system |
| CN105958469B (en) * | 2016-06-15 | 2018-08-24 | 厦门科灿信息技术有限公司 | A kind of programmable multi-machine parallel connection power-supply system is synchronous and current equalizing method |
| CN106130000A (en) * | 2016-06-30 | 2016-11-16 | 温州大学 | Take into account the system ambiguous control method of parallel operation of efficiency and current-sharing index |
| CN106160017A (en) * | 2016-06-30 | 2016-11-23 | 温州大学 | Based on current-sharing deviation expected matrix row and minimum parallel operation system optimized control method |
| CN106130000B (en) * | 2016-06-30 | 2018-11-06 | 温州大学 | It takes into account efficiency and flows the system ambiguous control method of parallel operation of index |
| CN106160017B (en) * | 2016-06-30 | 2018-11-06 | 温州大学 | Based on stream deviation expected matrix row and minimum parallel operation system optimized control method |
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Granted publication date: 20121219 Effective date of abandoning: 20150128 |
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