CN101119085B - PWM solar power control module of PWM solar controller - Google Patents
PWM solar power control module of PWM solar controller Download PDFInfo
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- CN101119085B CN101119085B CN2007101185132A CN200710118513A CN101119085B CN 101119085 B CN101119085 B CN 101119085B CN 2007101185132 A CN2007101185132 A CN 2007101185132A CN 200710118513 A CN200710118513 A CN 200710118513A CN 101119085 B CN101119085 B CN 101119085B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The present invention is a PWM solar energy power control module of the PWM solar energy controller, used for realizing the functions of output voltage adjustment of the solar panel and DC overvoltage protection. The PWM solar energy power control module includes a power switch element, a PWM detecting element connected with the power switch, a drive circuit arranged between the power switch and the PWM detecting element, a PWM control element connected with the drive circuit and a PWM main control element connected with the PWM control element, and further contains a standby control element arranged between the drive circuit and the CPU control circuit to provide overvoltage protection and be started when the PWM main control element is down, thereby withstanding the emergency conditions effectively and improving the reliability and safety of the whole solar energy system.
Description
Technical field
What the present invention relates to is a kind of power control circuit, particularly be a kind of PWM solar power control module of the PWM of being applied to controller for solar.
Background technology
Solar energy is as a kind of novel energy efficiently, more and more be subject to people's attention, present solar energy market has generally adopted the PWM control mode to regulate the energy output of solar panel and the management of charging and discharging of batteries, especially the solar power plant of middle low power all adopts the PWM regulative mode, see also shown in Figure 1, it is the functional structure sketch of prior PWM controller for solar, it comprises the control module 5 of PWM solar power, electric power system direct current Detection ﹠ Controling module 4, exchange Detection ﹠ Controling module 2, electric power system master controller 1 and high frequency switching rectifier module 3, and PWM solar power control module 5 is the critical components in the solar electric power supply system, how under the control of master controller 1, according to its instruction the electric energy of solar panel conversion is regulated, how to make the output voltage of cell panel keep stable, for providing stable with electric loading, reliable direct current energy; How simultaneously batteries to be carried out charge and discharge and safeguard, so that batteries is in optimum state as far as possible, this all is problem anxious to be solved for a person skilled in the art.
Summary of the invention
The objective of the invention is to, provide a kind of PWM solar power control module of PWM controller for solar, in order to address the above problem.
For achieving the above object, the invention provides a kind of PWM solar power control module of PWM controller for solar, it is in order to finish output voltage adjusting, the DC over-voltage protection function of solar panel, and it comprises:
The power switch parts, it links to each other with described solar panel;
The PWM detecting unit, it is in order to detect the PWM ripple, and is whether working properly with decision circuitry;
Drive circuit, it is isolated and conversion in order to carry out level, and switching levels provides drive signal for described power switch parts, and it is arranged between described power switch parts and the described PWM detecting unit;
The PWM control unit, it is connected with described PWM detecting unit, and produces the PWM ripple as the drive circuit input signal;
The PWM main control unit, it sets the size that a reference voltage is controlled the output voltage of solar panel, testing result to the solar panel fuse detection circuit is judged, operating state to the master controller of PWM controller for solar detects simultaneously, and make corresponding judgment according to testing result, master controller with the PWM controller for solar communicates simultaneously, uploading detection information, receive the instruction or the data of the master controller issue of PWM controller for solar, described PWM main control unit links to each other with described PWM control unit; Also comprise a standby control unit, be arranged between described drive circuit and the cpu control circuit, when described PWM control unit breaks down, enable; Described standby control unit comprises:
One power input interface circuit, it links to each other with a voltage conversion circuit on the one hand, in order to power to standby control unit, described on the other hand power input interface circuit links to each other with second comparison circuit with one first comparison circuit respectively, described first comparison circuit links to each other with a counting circuit, the output of described second comparison circuit and counting circuit links to each other with a control command interface circuit respectively, one control end of described control command interface circuit links to each other with the solid-state relay of described power switch parts by described drive circuit, and another control end of described control command interface circuit links to each other with cpu control circuit;
Preferable, described power switch parts are to be composed in series by rectifier diode and solid-state relay;
Preferable, it is made up of described PWM main control unit amplifier, feedback circuit and cpu control circuit, rectifier diode one end of one end of described feedback circuit and described power switch parts is in series, its other end links to each other with the first input end of described amplifier, second input of described amplifier obtains described reference voltage, and described reference voltage is set by cpu control circuit;
Preferable, described feedback circuit is made up of resistor voltage divider network, output voltage sampling to solar panel obtains error signal, and described PWM control unit is exactly with described error signal the output voltage of solar panel to be regulated and controlled;
Preferable, described PWM control unit is made up of saw-toothed wave generator, PWM comparison circuit, and described saw-toothed wave generator produces the signal of the amplifier output of a linear saw-tooth wave and described PWM main control unit and imported by the input of described PWM comparison circuit simultaneously;
Preferable, described second comparison circuit comprises an adjustable comparator;
Preferable, described first comparison circuit comprises the certain value comparator;
Preferable, the master controller of described PWM main control unit and PWM controller for solar carries out data communication by the RS485 serial communication protocol;
Preferable, also comprising a warning device, it is connected with described control command interface circuit;
The invention has the advantages that compared with the prior art, can effectively resist emergency situations, improved the stability and the fail safe of whole solar energy system.
Description of drawings
Fig. 1 is a PWM controller for solar structure diagram;
Fig. 2 is the functional structure chart of PWM solar power control module of the present invention;
Fig. 3 is the structure diagram of PWM solar power control module one preferred embodiment of the present invention;
Fig. 4 is the structure diagram of the standby control unit of PWM solar power control module of the present invention;
Fig. 5 is the circuit diagram of the standby control unit of PWM solar power control module of the present invention;
Fig. 6 is the workflow diagram of the standby control unit of PWM solar power control module of the present invention.
Embodiment
Below in conjunction with accompanying drawing, be described in more detail with other technical characterictic and advantage the present invention is above-mentioned.
See also shown in Figure 2, it is for the functional structure chart of PWM solar power control module of the present invention, it comprises: power switch parts 51, PWM detecting unit 52, drive circuit 53, PWM control unit 54 and PWM main control unit 56, and wherein said power switch parts 51 link to each other with described solar panel 6; Described PWM detecting unit 53 is in order to detect the PWM ripple, and whether working properly with decision circuitry, it links to each other with described drive circuit 52; Described drive circuit 52 is isolated and conversion in order to carry out level, and switching levels provides drive signal for described power switch parts 51, and it is arranged between described power switch parts 51 and the described PWM detecting unit 53; Described PWM control unit 54, it links to each other with described drive circuit 52, in order to produce the PWM ripple as drive circuit 52 input signals; Described PWM main control unit 56; it sets the size that a reference voltage comes control output voltage; testing result to solar panel 6 fuse detection circuit is judged; operating state to the master controller 1 of PWM controller for solar detects simultaneously; and make corresponding judgment according to testing result; master controller 1 with the PWM controller for solar communicates simultaneously; uploading detection information; receive the instruction or the data of master controller 1 issue of PWM controller for solar; the master controller 1 of described PWM main control unit 56 and PWM controller for solar carries out data communication by the RS485 serial communication protocol; described PWM main control unit 56 links to each other with described PWM control unit 54; comprise that also a standby control unit 55 is arranged between described drive circuit 52 and the described PWM main control unit 56; overvoltage protection when undertaking operate as normal on the one hand; on the other hand when described PWM main control unit 56 breaks down; described standby control unit 55 starts; realize simple voltage control; and when output voltage exceeds the set point of standby control unit 55; standby control unit 55 is closed output; when direct voltage reduced to a set point, standby control unit 55 was communicated with output.
See also shown in Figure 3ly, it is for the structure diagram of PWM solar power control module one preferred embodiment of the present invention; It is the refinement to functional module shown in Figure 2, and described power switch parts 51 are to be composed in series by solid-state relay 511 and rectifier diode 512, and the control end of described solid-state relay 511 links to each other with the output of described drive circuit 52; It is by amplifier 562 for a described PWM main control unit 56, feedback circuit 563 and cpu control circuit 561 are formed, described feedback circuit 563 is made up of resistor voltage divider network, sampling obtains error signal to output voltage, described PWM control unit 54 is by saw-toothed wave generator 542, PWM comparison circuit 541 is formed, the error signal that described cpu control circuit 561 generation reference voltages and described feedback circuit 563 produce inputs to an input of described PWM comparison circuit 541 by described amplifier 562, described saw-toothed wave generator 542 produces another input that a linear saw-tooth wave inputs to described PWM comparison circuit 541, thereby produce square wave PWM ripple just, described error signal is regulated and is controlled output voltage; The input of one PWM testing circuit 53 receives described PWM ripple, and detects, and is whether working properly to judge pwm control circuit 54; One end of one end of described feedback circuit 563 and the solid-state relay 511 of described power switch parts is in series, its other end links to each other with the first input end of described amplifier 562, second input of described amplifier 562 obtains described reference voltage, and described reference voltage is set by cpu control circuit 561; Also comprise a standby control unit 55; it is arranged between described drive circuit 52 and the described cpu control circuit 561; it is used for PWM main control unit 56 overvoltage protection when working properly, the voltage adjustment of carrying out on the other hand on the one hand when PWM main control unit 56 breaks down.
See also shown in Figure 4ly, it is for the structure diagram of the standby control unit of PWM solar power control module of the present invention; Described standby control unit comprises:
One power input interface circuit, 551 its one side link to each other with a voltage conversion circuit 552, in order to power to standby control unit 55, described on the other hand power input interface circuit 551 links to each other with second comparison circuit 555 with one first comparison circuit 553 respectively, described second comparison circuit 555 comprises an adjustable comparator, described first comparison circuit 553 comprises the certain value comparator, described first comparison circuit 553 links to each other with a counting circuit 554, the output of described second comparison circuit 555 and counting circuit 554 links to each other with a control command interface circuit 556 respectively, one control end of described control command interface circuit 556 links to each other with the solid-state relay 511 of described power switch parts by described drive circuit 52, and another control end of described control command interface circuit 556 links to each other with described cpu control circuit 561; Also comprise a warning device 557, it is connected with described control command interface circuit 556, when electric voltage exception switch solid-state relay, and outputting alarm signal under off-state.
See also shown in Figure 5, it is for the circuit diagram of the standby control unit of PWM solar power control module of the present invention, it is an embodiment to the module refinement of described Fig. 4, wherein said power supply access interface circuit comprises: power input interface P5 and master controller signal input interface P4, power supply input and the little current/voltage of 48V that described power input interface P5 finishes the big electric current of 48V detect input, described master controller signal input interface P4 obtains the 5V pulse signal, it judges whether the PWM main control unit breaks down, in order to start standby control unit;
Described voltage conversion circuit comprises triode T2 and voltage stabilizing chip U4, the power supply input power signal of the big electric current of 48V that provides by described power input interface P5 wherein, through triode T2 amplitude limit, step-down is about 15V, be transformed to the 12V stabilized voltage power supply through voltage stabilizing chip U4 again, in order to give whole standby control unit power supply.
Described second comparison circuit is enabled when described PWM main control unit breaks down, it is the adjustable comparator U1B of the adjustable predeterminated voltage of 51～55V, described first comparison circuit is 62V definite value comparator U1A, it is connected with timer U2, no matter all will carry out overvoltage when whether described PWM main control unit breaks down detects, described control command interface circuit comprises: relay switch TI2-12 (just often is in attracting state, normally closed contact disconnects, in case start then enter off-state, input grounding), PWM control unit interface P1, drive interface P2 and alarm signal output port P6, the external relay of alarm signal output port P6, work as electric voltage exception, outputting alarm signal when causing relay switch TI2-12 to disconnect.
See also shown in Figure 6ly, it is for the workflow diagram of the standby control unit of PWM solar power control module of the present invention;
Whether step a: it is normal to detect the work of PWM main control unit, if normal execution in step f, otherwise, following step b then carried out;
Step b: enable standby control unit;
Step c: whether the detection voltage of check input is higher than threshold value u1, carries out following step e if be higher than, and then carries out following steps d if be lower than;
Steps d: whether the detection voltage of check input is lower than threshold value u2, carries out following step f if be higher than, and then carries out following step e if be lower than;
Step e: the control switch of block system relay, carry out t minute time-delay, carry out above-mentioned steps c;
Step f: the control switch of closing relay.
Whether please in conjunction with shown in Figure 5, normal for the work of the described detection main control circuit of step a, it is that master controller signal input interface P4 by the control command interface circuit of standby control unit realizes inoperative standby control unit when short circuit; Otherwise if illustrate that fault (this fault may be hardware also may be software causes) has taken place the PWM main control unit, then enables standby control unit; Whether the detection voltage (it is to be detected by the voltage signal that power input interface P5 imports) for check input among the step c is higher than threshold value u1, it is that definite value comparator U1A by described first comparison circuit realizes, its threshold value u1 is 62V, when input voltage is higher than 62V, to export switch motion, make the switch TI2-12 of relay open ground connection, main interface P1 input this moment PWM ripple shorted to earth, can not damage drive circuit, unison counter U2 picks up counting, delay time t minute is 2 minutes, again input signal is detected later in 2 minutes; If when input voltage is lower than 62V, then carry out steps d, whether the detection voltage of check input is lower than threshold value u2, it is that adjustable comparator U1B by the adjustable predeterminated voltage of described second comparison circuit realizes, its predeterminated voltage territory is (51V, 55V) wherein u2 belongs to (51V, 55V), when input is lower than u2, adjustable comparator U1B outputs signal to the relay switch TI2-12 closure of described control command interface circuit, at this moment PWM control unit interface P1 and described drive interface P2 normally; If be higher than, execution in step e then, so periodic duty is normal until input.
The above only is preferred embodiment of the present invention, only is illustrative for the purpose of the present invention, and nonrestrictive.Those skilled in the art is understood, and can carry out many changes to it in the spirit and scope that claim of the present invention limited, revise, even equivalence, but all will fall within the scope of protection of the present invention.
Claims (9)
1. the PWM solar power control module of a PWM controller for solar, its in order to the output voltage of finishing solar panel regulate, the DC over-voltage protection function, it comprises:
The power switch parts, it links to each other with described solar panel;
The PWM detecting unit, it is in order to detect the PWM ripple, and is whether working properly with decision circuitry;
Drive circuit, it is isolated and conversion in order to carry out level, and switching levels provides drive signal for described power switch parts, and it is arranged between described power switch parts and the described PWM detecting unit;
The PWM control unit, it is connected with described PWM detecting unit, and produces the PWM ripple as the drive circuit input signal;
The PWM main control unit, it sets the size that a reference voltage is controlled the output voltage of solar panel, testing result to the solar panel fuse detection circuit is judged, operating state to the master controller of PWM controller for solar detects simultaneously, and make corresponding judgment according to testing result, master controller with the PWM controller for solar communicates simultaneously, uploading detection information, receive the instruction or the data of the master controller issue of PWM controller for solar, described PWM main control unit links to each other with described PWM control unit; It is characterized in that: also comprise a standby control unit, be arranged between the cpu control circuit of described drive circuit and described PWM main control unit, in order to carrying out overvoltage protection, and when described PWM main control unit breaks down, enable; Described standby control unit comprises:
One power input interface circuit, it links to each other with a voltage conversion circuit on the one hand, in order to power to standby control unit, described on the other hand power input interface circuit links to each other with second comparison circuit with one first comparison circuit respectively, described first comparison circuit links to each other with a counting circuit, the output of described second comparison circuit and counting circuit links to each other with a control command interface circuit respectively, one control end of described control command interface circuit links to each other with the solid-state relay of described power switch parts by described drive circuit, and another control end of described control command interface circuit links to each other with cpu control circuit.
2. the PWM solar power control module of PWM controller for solar according to claim 1 is characterized in that, described power switch parts are to be composed in series by rectifier diode and solid-state relay.
3. the PWM solar power control module of PWM controller for solar according to claim 1, it is characterized in that, it is made up of described PWM main control unit amplifier, feedback circuit and cpu control circuit, solid-state relay one end of one end of described feedback circuit and described power switch parts is in series, the other end of described feedback circuit links to each other with the first input end of described amplifier, second input of described amplifier obtains described reference voltage, and described reference voltage is set by cpu control circuit.
4. the PWM solar power control module of PWM controller for solar according to claim 3, it is characterized in that, described feedback circuit is made up of resistor voltage divider network, output voltage sampling to solar panel obtains error signal, and described PWM control unit is regulated and controlled the output voltage of solar panel with regard to being based on described error signal.
5. according to the PWM solar power control module of claim 1 or 4 described PWM controller for solar, it is characterized in that, described PWM control unit is made up of saw-toothed wave generator, PWM comparison circuit, described saw-toothed wave generator produces a linear saw-tooth wave, and the signal of the amplifier output of described linear saw-tooth wave and described PWM main control unit is input to the input of described PWM comparison circuit simultaneously.
6. the PWM solar power control module of PWM controller for solar according to claim 5 is characterized in that, described second comparison circuit comprises an adjustable comparator.
7. the PWM solar power control module of PWM controller for solar according to claim 5 is characterized in that, described first comparison circuit comprises the certain value comparator.
8. the PWM solar power control module of PWM controller for solar according to claim 1 is characterized in that, the master controller of described PWM main control unit and PWM controller for solar carries out data communication by the RS485 serial communication protocol.
9. the PWM solar power control module of PWM controller for solar according to claim 5 is characterized in that, also comprises a warning device, and it is connected with described control command interface circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101185132A CN101119085B (en) | 2007-07-09 | 2007-07-09 | PWM solar power control module of PWM solar controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101185132A CN101119085B (en) | 2007-07-09 | 2007-07-09 | PWM solar power control module of PWM solar controller |
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| CN101119085A CN101119085A (en) | 2008-02-06 |
| CN101119085B true CN101119085B (en) | 2011-05-18 |
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| CN2007101185132A Expired - Fee Related CN101119085B (en) | 2007-07-09 | 2007-07-09 | PWM solar power control module of PWM solar controller |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101408584B (en) * | 2008-10-09 | 2011-07-27 | 艾默生网络能源有限公司 | Apparatus for detecting multiplex fuse wire signal |
| CN101877545B (en) * | 2009-04-30 | 2012-07-18 | 鸿富锦精密工业（深圳）有限公司 | Power module |
| CN102496194A (en) * | 2011-11-25 | 2012-06-13 | 天津市翔晟远电力设备实业有限公司 | System and method used for near-field non-contact pole and tower identification |
| CN111405712A (en) * | 2020-03-03 | 2020-07-10 | 深圳市天视通电子科技有限公司 | Lamp control device and method |
| CN112255524B (en) * | 2020-12-06 | 2024-02-06 | 中车永济电机有限公司 | Protection method and detection device for electric transmission traction system |
| CN112965010B (en) * | 2021-02-07 | 2023-04-07 | 潍柴动力股份有限公司 | Fault detection method and device of electronic actuator, electronic control equipment and medium |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2706939Y (en) * | 2004-01-14 | 2005-06-29 | 南开大学 | Intelligent solar charging controller |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2706939Y (en) * | 2004-01-14 | 2005-06-29 | 南开大学 | Intelligent solar charging controller |
Non-Patent Citations (2)
| Title |
|---|
| 杨晓宇，王运涛.通信基站太阳能供电系统设计.电力系统通信28 176.2007,28(176),47-50,63. |
| 杨晓宇,王运涛.通信基站太阳能供电系统设计.电力系统通信28 176.2007,28(176),47-50,63. * |
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