CN204424869U - A kind of hiccup protections circuit and apply the photovoltaic generating system of this circuit - Google Patents
A kind of hiccup protections circuit and apply the photovoltaic generating system of this circuit Download PDFInfo
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- CN204424869U CN204424869U CN201520101398.8U CN201520101398U CN204424869U CN 204424869 U CN204424869 U CN 204424869U CN 201520101398 U CN201520101398 U CN 201520101398U CN 204424869 U CN204424869 U CN 204424869U
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The utility model provides a kind of hiccup protections circuit being applied to photovoltaic generating system, comprises power conversion circuits, power-sensing circuit, the energy that the photovoltaic polar plate for detecting described photovoltaic generating system provides; Voltage stabilizing breaking circuit, whether work for controlling power conversion circuits according to described energy size, when described energy is greater than predetermined power, stable output voltage makes power conversion circuits normally work; When described energy is less than predetermined power, power conversion circuits does not work.A kind of photovoltaic generating system applying this protective circuit is also provided simultaneously.The power conversion circuits that foregoing circuit is photovoltaic generating system is adopted to provide enough power and circuit protection effect.
Description
Technical field
The application designs field of photovoltaic technology, particularly a kind of hiccup protections circuit and apply the photovoltaic generating system of this circuit.
Background technology
What is called is had the hiccups phenomenon, is namely that be constantly in work and idle state, intermittent shorts fault appears in such as circuit, or the higher-order of oscillation constantly failure of oscillation and starting of oscillation when Circuits System is for a certain reason as short circuit, overload or operating voltage change etc.Consider that phenomenon of having the hiccups can cause the damage even paralysis of system of components and parts, must carry out necessary hiccup protections design to Circuits System, circuit must have simply simultaneously, and protection dissipation power is little, the feature that reliability is high.The ability that in photovoltaic generating system, photovoltaic polar plate provides usually less stable can cause circuit to have phenomenon of having the hiccups.
Summary of the invention
In view of this, the utility model embodiment provides a kind of hiccup protections circuit being applied to photovoltaic generating system, and the power conversion circuits for photovoltaic generating system provides enough power and circuit protection effect.
The utility model embodiment provides a kind of hiccup protections circuit being applied to photovoltaic generating system, comprises power conversion circuits, also comprises:
Power-sensing circuit, the energy that the photovoltaic polar plate for detecting described photovoltaic generating system provides;
Voltage stabilizing breaking circuit, whether work for controlling power conversion circuits according to described energy size, when described energy is greater than predetermined power, stable output voltage makes power conversion circuits normally work; When described energy is less than predetermined power, power conversion circuits does not work.
Further, described power-sensing circuit comprises the first resistor group, the second resistor group, the first voltage-stabiliser tube, the first switching tube, after described first resistor group and the second resistor group are connected, the other end of the first resistor group is electrically connected with the drain electrode of described first switching tube, and the other end of the second resistor group is electrically connected with the negative level of described first voltage-stabiliser tube;
The power supply of described photovoltaic polar plate is connected between described first resistor group and the second resistor group.
Further, the resistance of described second resistor group is much larger than the resistance of described first resistor group.
Further, described voltage stabilizing breaking circuit comprises the 3rd resistor group and transistor seconds composition, described 3rd resistor group is made up of the first resistance, the second resistance and the 3rd resistance, described first resistance is serially connected between the grid of described first switching tube and the negative level of described first voltage-stabiliser tube, described second resistance and the 3rd resistant series, ground connection after one end of the 3rd resistance is connected with the positive pole of described first voltage-stabiliser tube, the emitter of transistor seconds, the source electrode of the first switching tube; The grid that the collector electrode of described transistor seconds is connected to described first switching tube is connected; The base stage of described transistor seconds is connected between described second resistance and the 3rd resistance; The other end of described second resistance is the voltage output end of power conversion circuits.
Further, described first resistor group comprises a resistance or is formed by several resistant series; Described second resistor group comprises a resistance or is formed by several resistant series.
Further, described predetermined power is 200 watts.
Further, the resistance of described first resistor group is 120*6 Ω, and the resistance of described second resistor group is 1M*5 Ω, and described first resistance is 510 ohm, and described second resistance is 39K Ω, and described 3rd resistance is 2K Ω.
According to another aspect of the present utility model, the utility model embodiment also provides a kind of photovoltaic generating system, comprises photovoltaic polar plate and power conversion circuits, also comprises any one hiccup protections circuit above-mentioned.
Adopt technique scheme; PV pole plate there is following beneficial effect: if can not reach enough power; power conversion circuit is not worked; avoid due to the instability of photovoltaic polar plate generating and make output not stop to be in the state of turning on and off, achieving the protective effect to power conversion circuits.
Accompanying drawing explanation
By reading the detailed description done non-limiting example done with reference to the following drawings, the other features, objects and advantages of the application will become more obvious:
Fig. 1 shows the circuit diagram of the hiccup protections circuit that the application provides.
Embodiment
Below in conjunction with drawings and Examples, the application is described in further detail.Be understandable that, specific embodiment described herein is only for explaining relevant utility model, but not the restriction to this utility model.It also should be noted that, for convenience of description, in accompanying drawing, illustrate only the part relevant with relevant utility model.
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the application in detail in conjunction with the embodiments.
This hiccup protections circuit application is in photovoltaic generating system; be mainly power conversion circuits and enough power and circuit protection effect are provided, as shown in Figure 1, the hiccup protections circuit of what the utility model provided be applied to photovoltaic generating system; comprise power conversion circuits, described hiccup protections circuit also comprises:
Power-sensing circuit, the energy that the photovoltaic polar plate for detecting described photovoltaic generating system provides;
Voltage stabilizing breaking circuit, whether work for controlling power conversion circuits according to described energy size, when described energy is greater than predetermined power, stable output voltage makes power conversion circuits normally work; When described energy is less than predetermined power, power conversion circuits does not work.Preferably, predetermined power is 200 watts.
Described power-sensing circuit comprises the first resistor group R1x, the second resistor group R2x, the first voltage-stabiliser tube Z1, the first switching tube Q1, after described first resistor group and the second resistor group parallel connection, the other end of the first resistor group is electrically connected with the drain electrode of described first switching tube, and the other end of the second resistor group is connected with the negative electrode of described first voltage-stabiliser tube;
The positive pole (PV+) of described photovoltaic polar plate is connected between described first resistor group and the second resistor group.
Described photovoltaic polar plate is connected between PV+ and PV-(GND), and the auxiliary electric power supply that in figure ,+18V is formed by power conversion circuits (flyback, forward converter etc.) from photovoltaic polar plate.
Described voltage stabilizing breaking circuit comprises the 3rd resistor group R3x and transistor seconds Q2 and forms, described 3rd resistor group is made up of the first resistance R31, the second resistance R32 and the 3rd resistance R33, described first resistance is serially connected between the grid of described first switching tube and the negative level of described first voltage-stabiliser tube, described second resistance and the 3rd resistant series, ground connection after one end of the 3rd resistance is connected with the positive pole of described first voltage-stabiliser tube, the emitter of transistor seconds, the source electrode of the first switching tube; The grid that the collector electrode of described transistor seconds is connected to described first switching tube is connected; The base stage of described transistor seconds is connected between described second resistance and the 3rd resistance; The other end of described second resistance is the voltage output end of power conversion circuits, exports the voltage of+18V.
According to preferred embodiment of the present utility model, general optional R31=510 Ω, R32=39K Ω, R33=2K Ω.
According to preferred embodiment of the present utility model, the resistance of described second resistor group is much larger than the resistance of described first resistor group, and R2x>>R1x, general R2x are 1M*6 Ω, R1x is 120 Ω/10W*6;
According to preferred embodiment of the present utility model, described first resistor group comprises a resistance or is formed by several resistant series; Described second resistor group comprises a resistance or is formed by several resistant series, such as the first resistor group R1x comprises R11, R12, R13, R14, R15, R16, R2x comprises R21, R22, R23, R24, R25, and the resistance of each resistance can be the same or different; Simultaneously in the occasion of high voltage high impedance, generally select multiple resistant series dividing potential drop, can prevent resistive-open, because select a large resistance used time, voltage high-temperature is high, not easy heat radiation.
Its basic functional principle of hiccup protections circuit that the utility model provides is as follows:
Assuming that the energy that photovoltaic polar plate PV+ provides is lower than 200W; make Q1 open-minded by the voltage that Z1 voltage-stabiliser tube is stable; therefore the voltage of PV+ drags down by the loop that PV+--R1x--Q1--GND is formed; make power conversion circuits can not reach enough operating voltages thus not work; avoid due to the instability of photovoltaic polar plate generating and make output not stop to be in the state of turning on and off, achieving the protective effect to power conversion circuits.Now energy is mainly consumed on the first resistor group R1x.
The energy provided as photovoltaic polar plate PV+ is higher than 200W, make Q1 open-minded by the voltage that Z1 voltage-stabiliser tube is stable equally, PV+--R1x--GND forms loop and is dragged down by the voltage of PV+, but now the voltage of PV+ has reached the magnitude of voltage needed for power conversion circuits, therefore power conversion circuits work the+18V voltage of stable output.Now in order to avoid PV+--R1x--GND loop power loss when system stability works, the voltage divided by R32, R33 makes Q2 conducting, thus Q1 gate pole ground connection turning off.
The utility model embodiment also provides a kind of photovoltaic generating system, comprises photovoltaic polar plate and power conversion circuits, also comprises any one hiccup protections circuit above-mentioned.
More than describe and be only the preferred embodiment of the application and the explanation to institute's application technology principle.Those skilled in the art are to be understood that, utility model scope involved in the application, be not limited to the technical scheme of the particular combination of above-mentioned technical characteristic, also should be encompassed in when not departing from the design of described utility model, other technical scheme of being carried out combination in any by above-mentioned technical characteristic or its equivalent feature and being formed simultaneously.Such as, disclosed in above-mentioned feature and the application but the technical characteristic being not limited to have similar functions replace mutually and the technical scheme formed.
Claims (8)
1. be applied to a hiccup protections circuit for photovoltaic generating system, comprise power conversion circuits, it is characterized in that, described hiccup protections circuit also comprises:
Power-sensing circuit, the energy that the photovoltaic polar plate for detecting described photovoltaic generating system provides;
Voltage stabilizing breaking circuit, whether work for controlling power conversion circuits according to described energy size, when described energy is greater than predetermined power, stable output voltage makes power conversion circuits normally work; When described energy is less than predetermined power, power conversion circuits does not work.
2. hiccup protections circuit according to claim 1, it is characterized in that, described power-sensing circuit comprises the first resistor group, the second resistor group, the first voltage-stabiliser tube, the first switching tube, after described first resistor group and the second resistor group parallel connection, the other end of the first resistor group is connected with the drain electrode of described first switching tube, and the other end of the second resistor group is connected with the negative electrode of described first voltage-stabiliser tube;
The positive pole of described photovoltaic polar plate is connected between described first resistor group and the second resistor group.
3. hiccup protections circuit according to claim 2, is characterized in that, the resistance of described second resistor group is much larger than the resistance of described first resistor group.
4. hiccup protections circuit according to claim 2, it is characterized in that, described voltage stabilizing breaking circuit comprises the 3rd resistor group and transistor seconds composition, described 3rd resistor group is made up of the first resistance, the second resistance and the 3rd resistance, described first resistance is serially connected between the grid of described first switching tube and the negative level of described first voltage-stabiliser tube, described second resistance and the 3rd resistant series, ground connection after one end of the 3rd resistance is connected with the positive pole of described first voltage-stabiliser tube, the emitter of transistor seconds, the source electrode of the first switching tube; The grid that the collector electrode of described transistor seconds is connected to described first switching tube is connected; The base stage of described transistor seconds is connected between described second resistance and the 3rd resistance; The other end of described second resistance is the voltage output end of power conversion circuits.
5., according to the arbitrary described hiccup protections circuit of claim 2 ~ 4, it is characterized in that, described first resistor group comprises a resistance or is formed by several resistant series; Described second resistor group comprises a resistance or is formed by several resistant series.
6., according to the arbitrary described hiccup protections circuit of claim 1 ~ 4, it is characterized in that, described predetermined power is 200 watts.
7., according to the arbitrary described hiccup protections circuit of claim 4, it is characterized in that, the resistance of described first resistor group is 120*6 Ω; the resistance of described second resistor group is 1M*5 Ω; described first resistance is 510 ohm, and described second resistance is 39K Ω, and described 3rd resistance is 2K Ω.
8. a photovoltaic generating system, comprises photovoltaic polar plate and power conversion circuits, it is characterized in that, also comprise as arbitrary in claim 1 ~ 7 as described in hiccup protections circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520101398.8U CN204424869U (en) | 2015-02-12 | 2015-02-12 | A kind of hiccup protections circuit and apply the photovoltaic generating system of this circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520101398.8U CN204424869U (en) | 2015-02-12 | 2015-02-12 | A kind of hiccup protections circuit and apply the photovoltaic generating system of this circuit |
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| Publication Number | Publication Date |
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| CN204424869U true CN204424869U (en) | 2015-06-24 |
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| CN201520101398.8U Expired - Fee Related CN204424869U (en) | 2015-02-12 | 2015-02-12 | A kind of hiccup protections circuit and apply the photovoltaic generating system of this circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018171613A1 (en) * | 2017-03-21 | 2018-09-27 | 赤多尼科两合股份有限公司 | Two-stage switch power supply |
-
2015
- 2015-02-12 CN CN201520101398.8U patent/CN204424869U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018171613A1 (en) * | 2017-03-21 | 2018-09-27 | 赤多尼科两合股份有限公司 | Two-stage switch power supply |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150624 Termination date: 20220212 |