CN104949363A - Photovoltaic direct drive compressor unit and control method thereof - Google Patents
Photovoltaic direct drive compressor unit and control method thereof Download PDFInfo
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- CN104949363A CN104949363A CN201410112200.6A CN201410112200A CN104949363A CN 104949363 A CN104949363 A CN 104949363A CN 201410112200 A CN201410112200 A CN 201410112200A CN 104949363 A CN104949363 A CN 104949363A
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- compressor
- power
- photovoltaic
- air
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
- F24F2005/0064—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground using solar energy
- F24F2005/0067—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground using solar energy with photovoltaic panels
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a photovoltaic direct drive compressor unit and a control method thereof. The photovoltaic direct drive compressor unit comprises a compressor, inverter units and a power monitoring device, wherein the compressor is electrically connected with a photovoltaic cell and an alternating current power supply; the inverter units are arranged between the compressor and the photovoltaic cell and between the compressor and the alternating current power supply respectively; the power monitoring device is used for controlling the output power of the compressor based on the generation power and tendency of the photovoltaic cell and current load and tendency of the compressor. According to the photovoltaic direct drive compressor unit and the control method thereof, the output power of the compressor unit of an air conditioner is controlled through the power monitoring device, the purpose of reducing power consumption of the compressor unit is achieved, and the photovoltaic direct drive utilization rate of a photovoltaic cell direct drive variable frequency centrifugal machine unit is improved.
Description
Technical field
The present invention relates to field of air conditioning, especially, relate to a kind of photovoltaic direct-drive compressor group and control method thereof.
Background technology
Photovoltaic directly drives the centrifugal compressor system that frequency conversion centrifugal compressor system uses photovoltaic DC electricity Direct driver frequency conversion centrifugal compressor.Take the lead in have developed a set of photovoltaic for this system and directly drive the electrical integrated management platform of centrifugal compressor system hair, started the new model sending out the management of power use of photovoltaic generation and the electricity consumption of HVAC system.But, the deficiency of scheme before:
Although conventional photovoltaic power generation monitoring system and group control system have developed quite ripe, also there is many limitations:
Traditional photovoltaic generating system only provides the solution of photo-voltaic power generation station, although scheme is quite ripe, it has lacked the concentrated controling management to electrical equipment, does not more control the electrical equipment of HVAC system.
Traditional HVAC group control system normally by detecting the parameters such as the freezing temperature differential pressure for return main, being carried out Load Regulation to HVAC system, substantially not being considered the change of outdoor environment;
The traditional control of HVAC group control system to handpiece Water Chilling Units is only limitted on off control and freezing leaving water temperature controls, the control mode of this degree can only realize unit fast-refrigerating or standby fast, can not the current load of coupling system and variation tendency thereof, the load controlling handpiece Water Chilling Units exports, and utilization rate is low.Except DC frequency-changing centrifugal compressor and photovoltaic directly drive frequency conversion centrifugal compressor, fixed handpiece Water Chilling Units frequently, when adjusting coolant-temperature gage, can cause high frequent start and stop owing to reaching temperature spot rapidly, be unfavorable for stable operation of unit.
Summary of the invention
The object of the invention is to provide a kind of photovoltaic direct-drive compressor group and control method thereof, directly can drive the low technical problem of utilization rate to solve photovoltaic.
For achieving the above object, the invention provides a kind of photovoltaic direct-drive compressor group, comprising: compressor, be electrically connected with photovoltaic cell and AC power respectively; Inversion unit, is arranged between compressor and photovoltaic cell and between compressor and AC power; Also comprise power monitor device, control the power output of compressor based on the generated output of photovoltaic cell and trend and compressor current loads and trend.
Further, joining unit is provided with between photovoltaic cell and inversion unit.
Further, power supply unit is provided with between joining unit and inversion unit.
Further, convertor unit is provided with between AC power and inversion unit.
Further, transformer is provided with between convertor unit and AC power.
The control method power monitor device that present invention also offers a kind of photovoltaic direct-drive compressor group detects the load variations trend of compressor; According to testing result, output power is carried out to compressor.
Further, according to testing result, output power is carried out to compressor and comprise: the power output of limit compression machine, reduce the power consumption of unit, make the power consumption of compressor equal with the value of photovoltaic cell capable of generating power amount.
Further, according to testing result, output power is carried out to compressor and comprise: when the power consumption of air-conditioning is greater than photovoltaic generation power: when the load of air-conditioning system is in the trend risen, the output power limit value of air-conditioning remains unchanged.
Further, carry out output power and comprise: according to testing result to compressor when the power consumption of air-conditioning is greater than photovoltaic generation power: when the load of air-conditioning system is downward trend, the output power limit value of air-conditioning reduces 5%.
Further, carry out output power and comprise: when the power consumption of air-conditioning is less than photovoltaic generation power according to testing result to compressor: when the load of air-conditioning system is in the trend risen, the output power limit value of air-conditioning increases 5%.
Further, it is characterized in that, carry out output power according to testing result to compressor and comprise: when the power consumption of air-conditioning is less than photovoltaic generation power: when the load of air-conditioning system is downward trend, the output power limit value of air-conditioning remains unchanged.
The present invention has following beneficial effect:
The present invention controls the power output of compressor bank of air-conditioner by power monitor device, reaches the object of the power consumption reducing unit, improves the photovoltaic that photovoltaic cell directly drives variable frequency centrifuge group and directly drives utilization rate.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to figure, the present invention is further detailed explanation.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram according to photovoltaic direct-drive compressor group of the present invention; And
Fig. 2 is the schematic diagram according to photovoltaic direct-drive compressor group control method of the present invention.
Reference numeral in accompanying drawing is as follows: 10, compressor; 20, photovoltaic cell; 30, AC power; 40, inversion unit; 50, joining unit; 60, power supply unit; 70, convertor unit; 80, transformer; 90, power monitor device.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
See Fig. 1, according to photovoltaic direct-drive compressor group of the present invention, comprising: compressor 10, be electrically connected with photovoltaic cell 20 and AC power 30 respectively; Compressor 10 and all arrange inversion unit 40 between photovoltaic cell 20 and AC power 30 and also comprise power monitor device, detects the generated output of photovoltaic cell 20 and trend and compressor current loads and trend.The present invention controls the power output of compressor bank of air-conditioner by power monitor device, reaches the object of the power consumption reducing unit, improves the photovoltaic that photovoltaic cell directly drives variable frequency centrifuge group and directly drives utilization rate.
See Fig. 1, between photovoltaic cell 20 and inversion unit 40, be provided with joining unit 50.Power supply unit 60 is provided with between joining unit 50 and inversion unit 40.Convertor unit 70 is provided with between AC power 30 and inversion unit 40.Transformer 80 is provided with between convertor unit 70 and AC power 30.Power monitor device 90 controls the power output of compressor by compressor control mainboard.
Photovoltaic directly drives the electrical integrated management platform of air-conditioner set system hair and is suitable for air conditioner type and has: centrifuge, water-cooling screw rod machine, air-cooled screw machine, module machine, water source heat pump units, multi-joint unit.
Photovoltaic energy utilization rate refers to the efficiency of the compressor of photovoltaic energy DC powered frequency conversion centrifugation systems.
See Fig. 2, according to the real-time generated output of photovoltaic and the parameter such as trend, air conditioner load variation tendency, power output adjustment is carried out to air-conditioner set.The object of this control method, by the power output of restriction unit, reaches the object of the power consumption reducing unit, ensures that freezing leaving water temperature is stabilized in settings within one period allowed, makes the power consumption of air-conditioner set equal with the value of photovoltaic power generation quantity simultaneously.Control principle is as follows:
See Fig. 2, according to the control method of photovoltaic direct-drive compressor group of the present invention, power monitor device carries out power output adjustment according to the load variations trend of photovoltaic cell 20 in real time generated output and trend, compressor 10 to compressor 10, the power output of limit compression machine 10, reduce the power consumption of unit, make the power consumption of compressor 10 equal with the value of photovoltaic cell 20 generated energy.
The object of this control method, by the power output of restriction unit, reaches the object of the power consumption reducing unit, ensures that freezing leaving water temperature is stabilized in settings within one period allowed, makes the power consumption of air-conditioner set slightly larger than photovoltaic generation power simultaneously.Control method is as follows:
During compressor 10 unit starting, the initial power limit setting P1 of unit, acquiescence 50%, setting range is 50% ~ 100%.Output power limit value regulating cycle is that t1(gives tacit consent to 60 seconds).
(1) when the power consumption of compressor 10 is greater than photovoltaic generation power:
If photovoltaic generation power is in the trend risen, when the load of compressor 10 system is in the trend risen, the output power limit value of compressor 10 remains unchanged;
If photovoltaic generation power is in the trend risen, when the load of compressor 10 system is downward trend, the output power limit value of compressor 10 reduces 5%;
If photovoltaic generation power is downward trend, when the load of compressor 10 system is in the trend risen, the output power limit value of compressor 10 remains unchanged;
If photovoltaic generation power is downward trend, when the load of compressor 10 system is downward trend, the output power limit value of compressor 10 reduces 5%;
(2) when the power consumption of compressor 10 is less than photovoltaic generation power:
If photovoltaic generation power is in the trend risen, when the load of compressor 10 system is in the trend risen, the output power limit value of compressor 10 increases 5%;
If photovoltaic generation power is in the trend risen, when the load of compressor 10 system is downward trend, the output power limit value of compressor 10 remains unchanged;
If photovoltaic generation power is downward trend, when the load of compressor 10 system is in the trend risen, the output power limit value of compressor 10 increases 5%;
If photovoltaic generation power is downward trend, when the load of compressor 10 system is downward trend, the output power limit value of compressor 10 remains unchanged.
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect:
The present invention controls the power output of compressor bank of air-conditioner by power monitor device, reaches the object of the power consumption reducing unit, improves the photovoltaic that photovoltaic cell directly drives variable frequency centrifuge group and directly drives utilization rate; The present invention makes the generated energy of photovoltaic equal in the power consumption of unit as much as possible, and namely photovoltaic electricity uses directly to compressor bank, without convertor unit to mains supply, reduces the loss brought to mains supply.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, 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 amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. a photovoltaic direct-drive compressor group, is characterized in that, comprising:
Compressor (10), is electrically connected with photovoltaic cell (20) and AC power (30) respectively;
Inversion unit (40), is arranged between described compressor (10) and described photovoltaic cell (20) and between described compressor (10) and described AC power (30);
Also comprise power monitor device (90), control the power output of described compressor (10) based on the generated output of described photovoltaic cell (20) and trend and compressor current loads and trend.
2. photovoltaic direct-drive compressor group according to claim 1, is characterized in that,
Joining unit (50) is provided with between described photovoltaic cell (20) and described inversion unit (40).
3. photovoltaic direct-drive compressor group according to claim 2, is characterized in that,
Power supply unit (60) is provided with between described joining unit (50) and described inversion unit (40).
4. photovoltaic direct-drive compressor group according to claim 1, is characterized in that,
Convertor unit (70) is provided with between described AC power (30) and described inversion unit (40).
5. photovoltaic direct-drive compressor group according to claim 4, is characterized in that,
Transformer (80) is provided with between described convertor unit (70) and described AC power (30).
6. a control method for photovoltaic direct-drive compressor group, is characterized in that,
Power monitor device (90) detects the load variations trend of compressor (10);
According to testing result, output power is carried out to described compressor (10).
7. the control method of photovoltaic direct-drive compressor group according to claim 6, is characterized in that,
Describedly according to testing result, output power is carried out to described compressor (10) and comprising: the power output limiting described compressor (10), reduce the power consumption of unit, make the power consumption of described compressor (10) equal with the value of described photovoltaic cell (20) generated energy.
8. the control method of photovoltaic direct-drive compressor group according to claim 6, is characterized in that, describedly carries out output power according to testing result to described compressor (10) and comprises:
When the power consumption of air-conditioning is greater than photovoltaic generation power: when the load of air-conditioning system is in the trend risen, the output power limit value of air-conditioning remains unchanged.
9. the control method of photovoltaic direct-drive compressor group according to claim 6, is characterized in that, describedly carries out output power according to testing result to described compressor (10) and comprises:
When the power consumption of air-conditioning is greater than photovoltaic generation power: when the load of air-conditioning system is downward trend, the output power limit value of air-conditioning reduces 5%.
10. the control method of photovoltaic direct-drive compressor group according to claim 6, is characterized in that, describedly carries out output power according to testing result to described compressor (10) and comprises:
When the power consumption of air-conditioning is less than photovoltaic generation power: when the load of air-conditioning system is in the trend risen, the output power limit value of air-conditioning increases 5%.
The control method of 11. photovoltaic direct-drive compressor groups according to claim 6, is characterized in that, describedly carries out output power according to testing result to described compressor (10) and comprises:
When the power consumption of air-conditioning is less than photovoltaic generation power: when the load of air-conditioning system is downward trend, the output power limit value of air-conditioning remains unchanged.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410112200.6A CN104949363B (en) | 2014-03-24 | 2014-03-24 | Photovoltaic direct-drive compressor group and its control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410112200.6A CN104949363B (en) | 2014-03-24 | 2014-03-24 | Photovoltaic direct-drive compressor group and its control method |
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| CN104949363A true CN104949363A (en) | 2015-09-30 |
| CN104949363B CN104949363B (en) | 2017-10-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108076616A (en) * | 2017-12-27 | 2018-05-25 | 珠海格力电器股份有限公司 | Photovoltaic cooling device and photovoltaic centrifuge system |
| CN114413322A (en) * | 2021-12-25 | 2022-04-29 | 万江新能源集团有限公司 | Utilize geothermal heating system of photoelectric coupling hydrothermal type |
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| CN203798002U (en) * | 2014-03-24 | 2014-08-27 | 珠海格力电器股份有限公司 | Photovoltaic direct-drive compressor unit |
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| CN1106523A (en) * | 1993-10-19 | 1995-08-09 | 三星电子株式会社 | A control apparatus and method for an air conditioner |
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| CN114413322A (en) * | 2021-12-25 | 2022-04-29 | 万江新能源集团有限公司 | Utilize geothermal heating system of photoelectric coupling hydrothermal type |
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| CN104949363B (en) | 2017-10-27 |
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