CN203456880U - Intelligent control apparatus for solving problem of frequent morning-evening starting of photovoltaic grid-connected inverter - Google Patents
Intelligent control apparatus for solving problem of frequent morning-evening starting of photovoltaic grid-connected inverter Download PDFInfo
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- CN203456880U CN203456880U CN201320212447.6U CN201320212447U CN203456880U CN 203456880 U CN203456880 U CN 203456880U CN 201320212447 U CN201320212447 U CN 201320212447U CN 203456880 U CN203456880 U CN 203456880U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model relates to an intelligent control apparatus for solving a problem of frequent morning-evening starting of a photovoltaic grid-connected inverter. The intelligent control apparatus comprises an auxiliary power supply unit, a control assembly and a starting-up delay starting unit; the starting-up delay starting unit and the auxiliary power supply unit are connected to the control assembly and a direct-current power supply unit; and the control assembly is connected to the direct-current power supply unit and a power grid. The starting-up delay starting unit determines the output voltage of the direct-current power supply unit; when the output voltage is lower than a predetermined first voltage value, the electric energy of the direct-current power supply unit is consumed to avoid the starting of the auxiliary power supply unit; and when the output voltage is higher than the predetermined first voltage value, the starting-up delay starting unit stops consuming of the electric energy of the direct-current power supply unit and the control assembly maintains the starting state of the auxiliary power supply unit. When the intelligent control apparatus is used by the control circuit, if the energy outputted by the direct-current power supply unit is low, the delay starting unit enables the misoperation of starting of the auxiliary power supply unit to be avoided, thereby improving stability of the system.
Description
Technical field
The utility model relates to the control technology field of electronic circuit, particularly relates to the power electronics control device in inverter apparatus.
Background technology
The device such as solar panel is converted into electric energy after collecting solar energy, and by power delivery to electrical network, this intermediate demand is converted into direct current the inverter of interchange, is generally referred to as photovoltaic combining inverter.Solar energy has the feature of timeliness fluctuation, and for example, when noon sun is strong, energy is sufficient, and the direct voltage virtual height that solar panel is exported when the sunlight energy starvation such as morning or evening, energy is but very low; The voltage virtual height that causes photovoltaic combining inverter, energy shortage after accessory power supply unit starting, cause accessory power supply unit to quit work, such repeated priming, the meeting that quits work continue a very long time, can produce negative impact to user like this, think that photovoltaic combining inverter exists defect.
Utility model content
Given this, the error starting of accessory power supply unit when the purpose of this utility model is to avoid sunlight energy starvation, and again stop because energy shortage causes accessory power supply unit.
In order to realize the object of above-mentioned utility model, the technical solution adopted in the utility model is:
A kind of delay start device that connects DC power source unit and electrical network, comprise accessory power supply unit, control assembly and starting-up delay start unit, starting-up delay start unit is connected to control assembly and DC power source unit, accessory power supply unit is connected to control assembly and DC power source unit, control assembly is also connected to DC power source unit and electrical network, the output voltage of starting-up delay start unit judgement DC power source unit, when output voltage consumes the electric energy of DC power source unit during lower than predetermined the first magnitude of voltage, avoid accessory power supply unit starting, when output voltage is during higher than predetermined the first magnitude of voltage, starting-up delay start unit stops consuming the electric energy of DC power source unit, control assembly keeps the starting state of accessory power supply unit.
According on the other hand of the present utility model, after accessory power supply unit starting, the output voltage of control assembly monitoring DC power source unit, when output voltage is during lower than predetermined second voltage value, control assembly is closed accessory power supply unit.
Wherein, described control assembly comprises central processor unit, rectification unit and relay unit, wherein central processor unit is connected to respectively starting-up delay start unit, accessory power supply unit, DC power source unit, rectification unit and relay unit, rectification unit and relay unit are connected between accessory power supply unit and electrical network, when DC power source unit output voltage is during higher than predetermined the first magnitude of voltage, starting-up delay start unit stops consuming the electric energy of DC power source unit, central processor unit avoids starting-up delay start unit again to consume the electric energy of DC power source unit, and turn-on relay unit, when DC power source unit output voltage reduces, electrical network provides electric energy by rectification unit to accessory power supply unit, the starting state that keeps thus accessory power supply unit.
Wherein said rectification unit is IGBT full-bridge.
Wherein, described starting-up delay start unit comprises the first triode, the 3rd switch element, the first voltage stabilizing didoe, the second voltage stabilizing didoe and load resistance, the cathode potential of the first voltage stabilizing didoe is a part for the output voltage of DC power source unit, the base stage of anodic bonding to the first triode, the collector electrode of the first triode is connected to the negative electrode of the 3rd switch element and the second voltage stabilizing didoe, the 3rd switch element connects DC power source unit and load resistance, when the output voltage of DC power source unit is during lower than predetermined the first magnitude of voltage, the voltage that the first transistor base obtains after the first voltage stabilizing didoe lower than its conducting voltage, the collector voltage of the first triode is high causes the 3rd switch element conducting, load resistance is connected to DC power source unit.
On the other hand, described starting-up delay start unit also comprises the second triode, the base stage of the second triode is connected to control assembly, the collector electrode of the second triode is connected to the negative electrode of the 3rd switch element and the second voltage stabilizing didoe, the base voltage of controlling the second triode when control assembly is during higher than its conducting voltage, the collector voltage reduction of the second triode causes the 3rd switch element to turn-off, and load resistance is disconnected from DC power source unit.
Wherein, described starting-up delay start unit also comprises the first component piezoresistance and second component piezoresistance, and the ratio between the first component piezoresistance and second component piezoresistance determines the part that the negative electrode of the first voltage stabilizing didoe obtains from DC power source unit output voltage.
According on the other hand of the present utility model, described delay start device also comprises anti-reverse current diode, and described anti-reverse current diode is connected between DC power source unit and electrical network, avoids electrical network electric energy reverse flow to DC power source unit.
Described delay start device also comprises storage capacitor, and described anti-storage capacitor is connected between DC power source unit and anti-reverse current diode.
Especially, described anti-reverse current diode adopts the diode of 600V/30A.
Owing to adopting above technical scheme, when the energy starvation of DC power source unit output, delay start device is avoided the error starting of accessory power supply unit, has improved the stability of system.
After accessory power supply unit is activated, delay start device keeps the starting state of accessory power supply unit, avoids accessory power supply unit to be again turned off.
This delay start device institute consumed power only comprises accessory power supply cell power and relay power, and loss is little, energy savings.
In addition, this delay start device is provided with diode between DC power source unit and electrical network, has effectively avoided grid power to reflux and has entered DC power source unit.
Accompanying drawing explanation
Fig. 1 is according to the structured flowchart of the delayed startup device of the utility model execution mode.
Fig. 2 is according to the circuit diagram of starting-up delay start unit in the delayed startup device of utility model execution mode.
Embodiment
For the ease of those skilled in the art will recognize that below in conjunction with specific embodiment and accompanying drawing, the technical solution of the utility model is described in further detail.
At this, detailed example embodiment is disclosed.Yet concrete structure disclosed herein and function detail are only used to describe the object of example embodiment.Yet, can in many replacement forms, realize example embodiment, and should not be regarded as the example embodiment that only limits to illustrate at this.
Yet, should be appreciated that, the utility model is not limited to disclosed concrete example embodiment, and on the contrary, the utility model falls into all modifications, equivalent and the alternative in the scope of the present disclosure by covering.In the description for accompanying drawing, similar label represents similar element.
Should be appreciated that, although first, second grade of term is used as and describes different elements at this, these elements can not limited by these terms.These terms are only for differentiating an element and another element.For example, the first element can be called as the second element, and similarly, the second element can be called as the first element, and does not deviate from the scope of example embodiment.As used in this, term "and/or" comprises one or more relevant any and all combinations of listing item.
Should be appreciated that, when element is called as " connection " or " coupling " to another element, it can be directly connected or coupled to other elements, or also can have intermediary element.On the contrary, when element is called as " directly connection " or " directly coupling " to another element, there is not intermediary element.Other words that are used for describing relation between element should understand according to identical mode (for example, " and between " to " directly between ", " adjacent " to " direct neighbor " etc.).
Figure l is according to the structured flowchart of the delayed startup device of execution mode.
As shown in Figure 1, in this execution mode, delay start device is connected between DC power source unit and electrical network, comprise accessory power supply unit, control assembly and starting-up delay start unit, starting-up delay start unit is connected to control assembly and DC power source unit, and accessory power supply unit is connected to control assembly and continuous-current plant, and control assembly is also connected to DC power source unit and electrical network.DC power source unit is solar panel in the present embodiment, but the utility model is not limited to this, can be also other electric energy output equipments that other output energy exist fluctuation, such as wind-driven generator etc.
Particularly, control assembly comprises central processor unit CPU, rectification unit and relay unit, wherein, central processor unit CPU is connected to respectively starting-up delay start unit, accessory power supply unit, DC power source unit (solar panel), rectification unit and relay unit, and rectification unit and relay unit are connected between accessory power supply unit and electrical network.Rectification unit is IGBT full-bridge in particular, but other circuit that can complete rectification function also can be replaced use.
Fig. 2 is according to the circuit diagram of starting-up delay start unit in the delayed startup device of utility model execution mode.
As shown in Figure 2, starting-up delay start unit comprises the first triode Ql, the 3rd switch element Q3, the first voltage stabilizing didoe D1, the second voltage stabilizing didoe D2 and load resistance R16-R18, the cathode potential of the first voltage stabilizing didoe D1 is a part for the output voltage of DC power source unit, the base stage of anodic bonding to the first triode Q1, the collector electrode of the first triode Q1 is connected to the negative electrode of the 3rd switch element Q3 and the second voltage stabilizing didoe D2, and the 3rd switch element Q3 connects DC power source unit and load resistance R16-R18.
Below in conjunction with Fig. 2, analyze the function that starting-up delay start unit completes.The negative electrode of the first voltage stabilizing didoe D1 is connected between first group of resistance R 1-R3 and second group of resistance R 4-R5, and it is Va=V that current potential closes according to the dividing potential drop of first group of resistance and second group of resistance
pV* (R4+R5)/(Rl+R2+R3+R4+R5), when Va is less than voltage stabilizing didoe voltage V
dl(the output voltage V of solar panel during+0.7V
pVbe less than (V
dl+ 0.7V) * (Rl+R2+R3+R4+R5)/(R4+R5), be below referred to as the first voltage V
0), the base voltage of the first triode Q1 is less than its conducting voltage, thus the first triode Q1 cut-off; The collector voltage Vb=V of the first triode Q1
d2(for example, 15V), when Vb reaches the 3rd switching tube Q3 cut-in voltage, the 3rd switching tube Q3 conducting, between load resistance R16-R18 access PV positive pole and negative pole, the energy that consumes solar panel with this, makes the V of virtual height
pVreduce, accessory power supply unit cannot start thus.
Otherwise, when the output voltage V of solar panel
pVbe greater than the first voltage V
0time, when Va is greater than V
dl+ 0.7V, the first triode Q1 conducting, the collector voltage Vb of the first triode declines, and causes switching tube Q3 cut-off, and load resistance R16-R18 disconnects between PV positive pole and negative pole, no longer consumes the energy of solar panel, and accessory power supply unit is started.
On the other hand, described starting-up delay start unit also comprises the second triode Q2, and the base stage of the second triode Q2 is connected to central processor unit CPU, and the collector electrode Q2 of the second triode is connected to the negative electrode of the 3rd switch element Q3 and the second voltage stabilizing didoe D2.
After accessory power supply unit starting, base stage from from central processor unit CPU to the second triode Q2 sends LOAD signal (high level), the second triode Q1 conducting thus, the collector voltage Vb of the second triode declines, cause switching tube Q3 to turn-off, load resistance R16-R18 disconnects between PV positive pole and negative pole, can keep thus the starting state of accessory power supply unit.
After accessory power supply unit starting, the unit adhesive of central processor unit CPU control relay, accessory power supply unit is connected to electrical network by IGBT full-bridge like this, even the situation of the output energy decreases of solar panel like this, the electric power of electrical network can be carried to accessory power supply unit by IGBT full-bridge, can guarantee the continuous firing of accessory power supply unit and can again not quit work.
The bearing power P of the delayed startup device consumption that the utility model adopts equals accessory power supply cell power and adds relay power, and its loss is all less relatively, generally, in 4W left and right, effectively reduces like this loss of solar panel.
On the other hand, solar panel energy is lower at night, and system is when holding state, and central processor unit CPU is by detecting V
pVvoltage, as the V detecting
pVvoltage is lower than predetermined second voltage V
minwhen following, relay unit is cut off, load resistance R16-R18 is cut in circuit simultaneously.Like this after photovoltaic combining inverter starts by not can because of morning or evening energy low and cause the problem of accessory power supply unit repeated priming, and also guarantee that delayed startup device can not consume electric energy at night.
On the other hand, as shown in Figure 1, between solar panel and IGBT full-bridge, BUS electric capacity and diode are set, wherein BUS electric capacity plays the effect of energy storage, filtering; Diode plays the effect of anti-reverse electric current.The electric power that prevents electrical network flows to solar panel by IGBT full-bridge, thus solar panel is caused to damage.Especially, diode is selected 600V/30A diode.
It should be noted that; above-mentioned execution mode is only preferably embodiment of the utility model; can not be understood as the restriction to the utility model protection range; do not departing under the utility model design prerequisite, any minor variations that the utility model is made all belongs to protection range of the present utility model with modification.
Claims (10)
1. one kind solves the photovoltaic combining inverter intelligent controlling device of frequent starting sooner or later, comprise accessory power supply unit, control assembly and starting-up delay start unit, starting-up delay start unit is connected to control assembly and DC power source unit, accessory power supply unit is connected to control assembly and DC power source unit, control assembly is also connected to DC power source unit and electrical network, the output voltage of starting-up delay start unit judgement DC power source unit, when output voltage consumes the electric energy of DC power source unit during lower than predetermined the first magnitude of voltage, avoid accessory power supply unit starting, when output voltage is during higher than predetermined the first magnitude of voltage, starting-up delay start unit stops consuming the electric energy of DC power source unit, and control assembly keeps the starting state of accessory power supply unit.
2. the intelligent controlling device described in claim l, it is characterized in that, after accessory power supply unit starting, the output voltage of control assembly monitoring DC power source unit, when output voltage is during lower than predetermined second voltage value, control assembly is closed accessory power supply unit.
3. intelligent controlling device claimed in claim 1, it is characterized in that, described control assembly comprises central processor unit, rectification unit and relay unit, wherein, central processor unit is connected to respectively starting-up delay start unit, accessory power supply unit, DC power source unit, rectification unit and relay unit, rectification unit and relay unit are connected between accessory power supply unit and electrical network, when DC power source unit output voltage is during higher than predetermined the first magnitude of voltage, starting-up delay start unit stops consuming the electric energy of DC power source unit, central processor unit avoids starting-up delay start unit again to consume the electric energy of DC power source unit, and turn-on relay unit, when DC power source unit output voltage reduces, electrical network provides electric energy by rectification unit to accessory power supply unit, the starting state that keeps thus accessory power supply unit.
4. intelligent controlling device claimed in claim 3, is characterized in that, described rectification unit is IGBT full-bridge.
5. intelligent controlling device claimed in claim 1, it is characterized in that, described starting-up delay start unit comprises the first triode, the 3rd switch element, the first voltage stabilizing didoe, the second voltage stabilizing didoe and load resistance, the cathode potential of the first voltage stabilizing didoe is a part for the output voltage of DC power source unit, the base stage of anodic bonding to the first triode, the collector electrode of the first triode is connected to the negative electrode of the 3rd switch element and the second voltage stabilizing didoe, the 3rd switch element connects DC power source unit and load resistance, when the output voltage of DC power source unit is during lower than predetermined the first magnitude of voltage, the voltage that the first transistor base obtains after the first voltage stabilizing didoe lower than its conducting voltage, the collector voltage of the first triode is high causes the 3rd switch element conducting, load resistance is connected to DC power source unit.
6. intelligent controlling device claimed in claim 5, it is characterized in that, described starting-up delay start unit also comprises the second triode, the base stage of the second triode is connected to control assembly, the collector electrode of the second triode is connected to the negative electrode of the 3rd switch element and the second voltage stabilizing didoe, the base voltage of controlling the second triode when control assembly is during higher than its conducting voltage, and the collector voltage of the second triode reduces and causes the 3rd switch element to turn-off, and load resistance is disconnected from DC power source unit.
7. intelligent controlling device claimed in claim 5, it is characterized in that, described starting-up delay start unit also comprises the first component piezoresistance and second component piezoresistance, and the ratio between the first component piezoresistance and second component piezoresistance determines the part that the negative electrode of the first voltage stabilizing didoe obtains from DC power source unit output voltage.
8. intelligent controlling device claimed in claim 1, it is characterized in that, described delay start device also comprises anti-reverse current diode, and described anti-reverse current diode is connected between DC power source unit and electrical network, avoids electrical network electric energy reverse flow to DC power source unit.
9. intelligent controlling device claimed in claim 8, is characterized in that, described delay start device also comprises anti-storage capacitor, and described anti-storage capacitor is connected between DC power source unit and anti-reverse current diode.
10. intelligent controlling device claimed in claim 8, is characterized in that, described anti-reverse current diode is 600V/30A diode.
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| CN201320212447.6U CN203456880U (en) | 2013-04-25 | 2013-04-25 | Intelligent control apparatus for solving problem of frequent morning-evening starting of photovoltaic grid-connected inverter |
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|---|---|---|---|
| CN201320212447.6U CN203456880U (en) | 2013-04-25 | 2013-04-25 | Intelligent control apparatus for solving problem of frequent morning-evening starting of photovoltaic grid-connected inverter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104124698A (en) * | 2013-04-25 | 2014-10-29 | 惠州天能源逆变技术有限公司 | Intelligent control scheme for solving morning-evening frequent starting of photovoltaic grid-connected inverter |
| CN104158218A (en) * | 2014-08-27 | 2014-11-19 | 阳光电源股份有限公司 | Photovoltaic inverter starting control method and system and photovoltaic power generation system |
| CN112510998A (en) * | 2020-11-26 | 2021-03-16 | 武汉美格科技股份有限公司 | Solar MPPT booster unit |
-
2013
- 2013-04-25 CN CN201320212447.6U patent/CN203456880U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104124698A (en) * | 2013-04-25 | 2014-10-29 | 惠州天能源逆变技术有限公司 | Intelligent control scheme for solving morning-evening frequent starting of photovoltaic grid-connected inverter |
| CN104158218A (en) * | 2014-08-27 | 2014-11-19 | 阳光电源股份有限公司 | Photovoltaic inverter starting control method and system and photovoltaic power generation system |
| US9553503B2 (en) | 2014-08-27 | 2017-01-24 | Sungrow Power Supply Co., Ltd. | Method for startup control of photovoltaic inverter, system thereof, and photovoltaic power generation system |
| CN104158218B (en) * | 2014-08-27 | 2017-03-01 | 阳光电源股份有限公司 | A kind of photovoltaic DC-to-AC converter starts control method, system and photovoltaic generating system |
| CN112510998A (en) * | 2020-11-26 | 2021-03-16 | 武汉美格科技股份有限公司 | Solar MPPT booster unit |
| CN112510998B (en) * | 2020-11-26 | 2022-03-11 | 武汉美格科技股份有限公司 | Solar MPPT booster unit |
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Free format text: FORMER OWNER: TIANBAO ELECTRONIC (HUIZHOU) CO., LTD. Effective date: 20150525 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 516005 Dongjiang Industrial Zone, Shuikou subdistrict, Huicheng District, Guangdong, Huizhou Patentee after: HUIZHOU TEN SOURCES SOLAR ELECTRICITY Ltd. Patentee after: TEN PAO ELECTRONICS (HUIZHOU) Co.,Ltd. Address before: 516005 Dongjiang Industrial Zone, Shuikou subdistrict, Huicheng District, Guangdong, Huizhou Patentee before: HUIZHOU TEN SOURCES SOLAR ELECTRICITY Ltd. Patentee before: TEN PAO ELECTRONICS (HUIZHOU) Co.,Ltd. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20150525 Address after: 516005 Dongjiang Industrial Zone, Shuikou subdistrict, Huicheng District, Guangdong, Huizhou Patentee after: HUIZHOU TEN SOURCES SOLAR ELECTRICITY Ltd. Address before: 516005 Dongjiang Industrial Zone, Shuikou subdistrict, Huicheng District, Guangdong, Huizhou Patentee before: HUIZHOU TEN SOURCES SOLAR ELECTRICITY Ltd. Patentee before: TEN PAO ELECTRONICS (HUIZHOU) Co.,Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20140226 |