CN103001545A - Solar system - Google Patents
Solar system Download PDFInfo
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- CN103001545A CN103001545A CN2012105182469A CN201210518246A CN103001545A CN 103001545 A CN103001545 A CN 103001545A CN 2012105182469 A CN2012105182469 A CN 2012105182469A CN 201210518246 A CN201210518246 A CN 201210518246A CN 103001545 A CN103001545 A CN 103001545A
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- power
- photovoltaic module
- solar energy
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- line voltage
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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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a solar system which comprises a photovoltaic assembly for receiving solar energy and converting the solar energy into electric energy, a mains supply connector for being connected with mains supply and a composite distribution invertion device respectively connected with the photovoltaic assembly and the mains supply connector and used for controlling the photovoltaic assembly and the mains supply to directly supply power to a load. By means of the solar system, the photovoltaic assembly of the solar system can directly supply power to the load instead of pre-storing the electrical power into a storage battery and enabling the storage battery to supply power to the load. Simultaneously when output power is smaller than load power, the mains supply is not totally switched for supplying power, but the mains supply and the photovoltaic assembly supply power together, and the effect of saving energy can be achieved.
Description
Technical field
The present invention relates to field of solar energy, in particular to a kind of solar energy system.
Background technology
In the prior art, solar energy system all contains storage battery, because the storage battery cost is higher, therefore, solar energy system involves great expense, and simultaneously, the accumulator cell charging and discharging number of times is limited, needs to safeguard to change, and deals with improperly if storage battery is scrapped, also can be to environment.Because general solar energy system can't satisfy long-time relatively high power load need for electricity, therefore, introduce the mains hybrid mode, this mode needs storage battery as energy storage device equally, if the storage battery quantity not sufficient switches to then that civil power charges the battery or the direct powering load of civil power.Such system effectiveness is also lower, has the portion of energy loss in system's charging, discharge process, and capacity usage ratio is not high, and the system cost maintenance cost is higher.
For the not high problem of solar energy system capacity usage ratio in the prior art, effective solution is proposed not yet at present.
Summary of the invention
The invention provides a kind of solar energy system, to solve at least the not high problem of solar energy system capacity usage ratio in the prior art.
To achieve these goals, according to an aspect of the present invention, provide a kind of solar energy system.
Solar energy system according to the present invention comprises: photovoltaic module is used for receiving solar energy and converts solar energy to electric energy; Commercial power interface is used for connecting civil power; Compound distribution inverter is connected with commercial power interface with photovoltaic module respectively, is used for control photovoltaic module and civil power and directly powers to the load.
Further, compound distribution inverter also is used for: when the power output of photovoltaic module during more than or equal to bearing power, the control photovoltaic module powers to the load; And when the power output of photovoltaic module during less than bearing power, control photovoltaic module and civil power power to the load jointly.
Further, compound distribution inverter comprises: processor is used for judging the power output of photovoltaic module and the magnitude relationship of bearing power; Power supply circuits are connected with commercial power interface with photovoltaic module respectively, when the power output of photovoltaic module during more than or equal to bearing power, conducting photovoltaic module, and when the power output of photovoltaic module during less than bearing power, conducting photovoltaic module and commercial power interface.
Further, compound distribution inverter also comprises: rectification circuit is used for converting civil power to direct current.
Further, compound distribution inverter also comprises: inverter is used for the direct current of photovoltaic module output and the converting direct-current power into alternating-current power of rectification circuit output.
Further, compound distribution inverter also comprises: collector, be connected with commercial power interface, be used for gathering the line voltage signal, wherein, the line voltage signal comprises line voltage amplitude signal and line voltage phase signal, comprises the size of line voltage amplitude in the line voltage amplitude signal, comprises the size of line voltage phase place in the line voltage phase signal; Comparator is connected to collector, is used for reverse frequency and phase place according to the output voltage of the compound distribution inverter of line voltage signal correction.
Further, comparator comprises: the first controller, for the output voltage amplitude of controlling compound distribution inverter, wherein, the difference of output voltage amplitude and line voltage amplitude is directly proportional with the reactive power of compound distribution inverter output.
Further, comparator also comprises: second controller, for the output voltage phase place of controlling compound distribution inverter, wherein, the difference of output voltage phase place and line voltage phase place is directly proportional with the active power of compound distribution inverter output.
By the present invention, the photovoltaic module of solar energy system does not need to deposit electric energy in storage battery first, powered to the load by storage battery again, but directly power to the load, simultaneously, in power output during less than bearing power, not to switch fully by mains-supplied, but jointly powered by civil power and photovoltaic module, therefore solve the not high problem of solar energy system capacity usage ratio in the prior art, and then reached the effect of energy savings.
Description of drawings
The accompanying drawing that consists of the application's a part is used to provide a further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the structured flowchart according to the solar energy system of the embodiment of the invention;
Fig. 2 is the schematic diagram according to the solar energy system of the embodiment of the invention.
Embodiment
Need to prove that in the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
The embodiment of the invention provides a kind of solar energy system, below solar energy system that the embodiment of the invention is provided be introduced.
Fig. 1 is the structured flowchart according to the solar energy system of the embodiment of the invention.
As shown in Figure 1, this solar energy system comprises photovoltaic module 11, commercial power interface 12 and compound distribution inverter 13.
Photovoltaic module 11 is used for receiving solar energy and converts solar energy to electric energy.
Commercial power interface 12 is used for connecting civil power.
Compound distribution inverter 13 is used for being connected with commercial power interface with photovoltaic module 11 being connected, is used for controlling photovoltaic module 11 and civil power directly powers to the load.
Of the prior artly also comprise a kind of miniature grid-connected inverter, the direct current of directly photovoltaic module 11 being exported is converted to alternating current to be incorporated in the utility grid, namely, electrical network as an energy storage device, when the quantity of photovoltaic module acquires a certain degree, can be affected the stability of electrical network, compound distribution inverter 13 in the present embodiment is with behind the commercial power rectification, with the compound common powering load of electric energy of photovoltaic module 12 outputs, to the utility grid power supply, do not satisfy energy-conservation and stable demand.
In order to reduce the use of civil power, the energy that present embodiment preferentially uses photovoltaic module 11 to provide, preferably, when compound distribution inverter 13 also is used for power output when photovoltaic module 11 more than or equal to bearing power, controls photovoltaic module 11 and directly power to the load.For example, when the power of photovoltaic module 11 output during greater than bearing power, the DC interface that can directly have by solar energy system is externally exported, to the DC load power supply, such as the drive ventilation fan etc.When civil power cut off the power supply, photovoltaic module 11 also can be separately the low-power load power supply.
When the power output of photovoltaic module 11 during less than bearing power, control photovoltaic module 11 and civil power power to the load jointly.
The below is a kind of way of realization of above-mentioned functions, and compound distribution inverter 13 comprises: processor is used for judging the power output of photovoltaic module and the magnitude relationship of bearing power; Power supply circuits are connected with commercial power interface with photovoltaic module respectively, when the power output of photovoltaic module during more than or equal to bearing power, conducting photovoltaic module, and when the power output of photovoltaic module during less than bearing power, conducting photovoltaic module and commercial power interface.
When civil power cuts off the power supply; grid side is equivalent to short-circuit condition; this moment, solar energy system was because automatic overload protection; cut off and grid contact; processor is by detecting inverter output voltage and reference voltage relatively; then by control PWM output duty cycle, realize the stable operation of solar energy system independence, the prerequisite of independent stable operation is that photovoltaic module 11 can provide enough power.If load is too large or sunshine condition is relatively poor, then solar energy system can't be exported enough power, and the terminal voltage of photovoltaic module 11 can descend; thereby output AC voltage is reduced, enter the low-voltage variation state, the direct current component normal operation; when power system restoration is powered, will automatically switch to normal mode.
In the present embodiment, the photovoltaic module of solar energy system does not need to deposit electric energy in storage battery first, powered to the load by storage battery again, but directly power to the load, simultaneously, in power output during less than bearing power, not to switch fully by mains-supplied, but jointly powered by civil power and photovoltaic module, therefore solve the not high problem of solar energy system capacity usage ratio in the prior art, and then reached the effect of energy savings.
The solar energy system that present embodiment provides has saved fraud costliness and not long storage battery of life-span, has reduced the solar energy system cost, and has reduced the environmental pollution that brings after storage battery is scrapped, and improved the bulk life time of solar energy system.
Fig. 2 is the schematic diagram according to the solar energy system of the embodiment of the invention, such as Fig. 2, enter compound distribution inverter from the alternating current of commercial power interface and the direct current of photovoltaic module generation, compound distribution inverter is given respectively the power supply of DC load and AC load according to the actual demand of load.
In order to satisfy the demand of high power DC electrical appliance, need to when can't providing enough electric energy, use photovoltaic module civil power, and preferably, compound distribution inverter also comprises: rectification circuit is used for converting civil power to direct current.
For the electric energy feedback electrical network that prevents solar energy system electrical network is impacted, can make the direct current after the rectification again convert alternating current to, preferably, compound distribution inverter also comprises: inverter is used for the direct current of photovoltaic module output and the converting direct-current power into alternating-current power of rectification circuit output.Be direct current with the commercial power rectification first, power to DC load, become alternating current to power to AC load with the dc inverter of photovoltaic module direct current again, because rectifying part is irreversible, thereby thereby guarantee that the alternating current after the inversion can not affect electrical network as the electrical network transmission of electric energy.System has the detection control circuit, and the electric energy that photovoltaic battery panel sends is not transported to electrical network, can not impact electrical network.
In order to guarantee that the solar energy system inverter output voltage is identical with civil power, and phase place is identical with civil power, can feedback element be set in solar energy system, and preferably, compound distribution inverter also comprises collector and comparator.
Collector is connected with commercial power interface, be used for gathering the line voltage signal, wherein, the line voltage signal comprises line voltage amplitude signal and line voltage phase signal, the size that comprises the line voltage amplitude in the line voltage amplitude signal comprises the size of line voltage phase place in the line voltage phase signal.
Comparator is connected to collector, is used for reverse frequency and phase place according to the output voltage of the compound distribution inverter of line voltage signal correction.
Solar energy system will be from city's signal of telecommunication of electrical network as reference signal u0, Converting Unit receives this reference signal in the solar energy system, output voltage u1 follows the tracks of synchronizing signal u0 and forms phase-locked loop circuit, because the frequency of oscillation precision of crystal oscillator is very high, good stability is arranged, and Acquisition Circuit gathers mains voltage signal constantly, by comparison circuit correction reverse frequency and phase place, thereby the voltage that has guaranteed inversion output is identical with public civil power with frequency, and guarantees that u1 is consistent with the phase place of u0.
In a kind of preferred implementation, comparator comprises: the first controller, be used for controlling the output voltage amplitude of compound distribution inverter, wherein, the difference of output voltage amplitude and line voltage amplitude is directly proportional with the reactive power of compound distribution inverter output.By the adjusting to output voltage amplitude, can change the distribution of the reactive power of photovoltaic module and civil power.
In the preferred implementation of another kind, comparator also comprises: second controller, be used for controlling the output voltage phase place of compound distribution inverter, wherein, the difference of output voltage phase place and line voltage phase place is directly proportional with the active power of compound distribution inverter output.By the adjusting to the output voltage phase place, can change the distribution of the active power of photovoltaic module and civil power.
The active-power P 1 of photovoltaic power saving apparatus output is determined by phase place α that mainly reactive power Q 1 mainly determines that by difference in magnitude (U1-U0) namely, the width of cloth of output voltage is poor to be directly proportional with reactive power, and phase difference is directly proportional with active power.By reconciling photovoltaic inverting system and amplitude and phase place the civil power reference voltage signal, can realize that the active power reactive power with civil power output of photovoltaic system is distributed.
In the present embodiment, solar energy system inside has shunt capacitance, but shunt capacitance Effective Raise power factor (PF).Photovoltaic module in the solar energy system can provide a part of electric energy, reduces the electric current that utility grid provides, thereby reduces line loss.
Solar energy system also has the maximal power tracing function, according to photovoltaic module power generation characteristics curve, at load not simultaneously, output power of photovoltaic module is different, constantly adjust load by internal circuit, make the photovoltaic module power stage maintain maximum outgoing position.The power that provided by photovoltaic module is provided the size of adjusting load herein, adjusts civil power and photovoltaic module for the load supplying ratio.Because it is non-linear that the output current-voltage curve of photovoltaic module and voltage-power have, at each constantly, therefore the corresponding different current values of different voltages, exist a maximum power point, affect the maximum power of photovoltaic module for the fine setting on the load supplying ratio.By with adjusted, can realize the photovoltaic module power stage is maintained maximum outgoing position, therefore, but the energy output of Effective Raise photovoltaic module.
As can be seen from the above description, the embodiment of the invention has improved the utilance of solar energy.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a solar energy system is characterized in that, comprising:
Photovoltaic module is used for receiving solar energy and converts described solar energy to electric energy;
Commercial power interface is used for connecting civil power;
Compound distribution inverter, respectively with described photovoltaic module be connected commercial power interface and be connected, be used for controlling described photovoltaic module and described civil power directly powers to the load.
2. solar energy system according to claim 1 is characterized in that, described compound distribution inverter also is used for:
When the power output of described photovoltaic module during more than or equal to bearing power, control described photovoltaic module to described load supplying; And when the power output of described photovoltaic module during less than described bearing power, control described photovoltaic module and described civil power jointly to described load supplying.
3. solar energy system according to claim 2 is characterized in that, described compound distribution inverter comprises:
Processor is used for judging the power output of described photovoltaic module and the magnitude relationship of described bearing power;
Power supply circuits, respectively with described photovoltaic module be connected commercial power interface and be connected, when the power output of described photovoltaic module during more than or equal to described bearing power, the described photovoltaic module of conducting, when the power output of described photovoltaic module during less than described bearing power, the described photovoltaic module of conducting and described commercial power interface.
4. solar energy system according to claim 2 is characterized in that, described compound distribution inverter also comprises:
Rectification circuit is used for converting civil power to direct current.
5. solar energy system according to claim 4 is characterized in that, described compound distribution inverter also comprises:
Inverter is used for the direct current of described photovoltaic module output and the converting direct-current power into alternating-current power of described rectification circuit output.
6. solar energy system according to claim 5 is characterized in that, described compound distribution inverter also comprises:
Collector, be connected with described commercial power interface, be used for gathering the line voltage signal, wherein, described line voltage signal comprises line voltage amplitude signal and line voltage phase signal, the size that comprises the line voltage amplitude in the described line voltage amplitude signal comprises the size of line voltage phase place in the described line voltage phase signal;
Comparator is connected to described collector, is used for reverse frequency and phase place according to the output voltage of the described compound distribution inverter of described line voltage signal correction.
7. solar energy system according to claim 6 is characterized in that, described comparator comprises:
The first controller, for the output voltage amplitude of controlling described compound distribution inverter, wherein, the difference of described output voltage amplitude and described line voltage amplitude is directly proportional with the reactive power of described compound distribution inverter output.
8. solar energy system according to claim 6 is characterized in that, described comparator also comprises:
Second controller, for the output voltage phase place of controlling described compound distribution inverter, wherein, the difference of described output voltage phase place and described line voltage phase place is directly proportional with the active power of described compound distribution inverter output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210518246.9A CN103001545B (en) | 2012-12-04 | 2012-12-04 | Solar energy system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210518246.9A CN103001545B (en) | 2012-12-04 | 2012-12-04 | Solar energy system |
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| CN103001545A true CN103001545A (en) | 2013-03-27 |
| CN103001545B CN103001545B (en) | 2015-09-23 |
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| CN201210518246.9A Active CN103001545B (en) | 2012-12-04 | 2012-12-04 | Solar energy system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107591876A (en) * | 2016-07-07 | 2018-01-16 | 上海博恩世通光电股份有限公司 | The electric supply installation and method of supplying power to of solar energy mains hybrid |
| CN108616162A (en) * | 2018-04-24 | 2018-10-02 | 习嘉睿 | A kind of solar photovoltaic water pump alternating current-direct current intelligent power supply circuit system |
| CN112600262A (en) * | 2019-10-01 | 2021-04-02 | 阿里巴巴集团控股有限公司 | System and method for adjusting cabinet power budget to facilitate increased server deployment density |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1091259A (en) * | 1996-09-10 | 1998-04-10 | Daikin Ind Ltd | Output power control method for solar battery |
| CN1972061A (en) * | 2005-11-21 | 2007-05-30 | 中国科学院电工研究所 | Apparatus and method of recovering voltage amplitude and phase in drooping method of outer characteristic |
| CN102122833A (en) * | 2011-03-25 | 2011-07-13 | 清华大学 | Non-master/slave self-current-sharing grid-connected parallel uninterrupted power supply system and power supply method thereof |
| CN102307037A (en) * | 2011-03-15 | 2012-01-04 | 隆鑫通用动力股份有限公司 | Control method and device for parallel running of internal combustion engine-driven generating sets |
| CN102522810A (en) * | 2012-01-06 | 2012-06-27 | 宋京伟 | Solar energy and utility power complementary power supply control system |
| CN102705944A (en) * | 2012-06-28 | 2012-10-03 | 南车株洲电力机车研究所有限公司 | Solar frequency-conversion air-conditioning system |
-
2012
- 2012-12-04 CN CN201210518246.9A patent/CN103001545B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1091259A (en) * | 1996-09-10 | 1998-04-10 | Daikin Ind Ltd | Output power control method for solar battery |
| CN1972061A (en) * | 2005-11-21 | 2007-05-30 | 中国科学院电工研究所 | Apparatus and method of recovering voltage amplitude and phase in drooping method of outer characteristic |
| CN102307037A (en) * | 2011-03-15 | 2012-01-04 | 隆鑫通用动力股份有限公司 | Control method and device for parallel running of internal combustion engine-driven generating sets |
| CN102122833A (en) * | 2011-03-25 | 2011-07-13 | 清华大学 | Non-master/slave self-current-sharing grid-connected parallel uninterrupted power supply system and power supply method thereof |
| CN102522810A (en) * | 2012-01-06 | 2012-06-27 | 宋京伟 | Solar energy and utility power complementary power supply control system |
| CN102705944A (en) * | 2012-06-28 | 2012-10-03 | 南车株洲电力机车研究所有限公司 | Solar frequency-conversion air-conditioning system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107591876A (en) * | 2016-07-07 | 2018-01-16 | 上海博恩世通光电股份有限公司 | The electric supply installation and method of supplying power to of solar energy mains hybrid |
| CN108616162A (en) * | 2018-04-24 | 2018-10-02 | 习嘉睿 | A kind of solar photovoltaic water pump alternating current-direct current intelligent power supply circuit system |
| CN112600262A (en) * | 2019-10-01 | 2021-04-02 | 阿里巴巴集团控股有限公司 | System and method for adjusting cabinet power budget to facilitate increased server deployment density |
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| CN103001545B (en) | 2015-09-23 |
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