CN116961525A - Multi-aspect intelligent power supply system for islands - Google Patents
Multi-aspect intelligent power supply system for islands Download PDFInfo
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- 238000001816 cooling Methods 0.000 claims abstract description 290
- 238000004146 energy storage Methods 0.000 claims abstract description 95
- 238000010248 power generation Methods 0.000 claims abstract description 76
- 238000012512 characterization method Methods 0.000 claims abstract description 29
- 238000009423 ventilation Methods 0.000 claims description 31
- 238000001514 detection method Methods 0.000 claims description 23
- 238000012546 transfer Methods 0.000 claims description 4
- 230000004913 activation Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 description 10
- 239000002826 coolant Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
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- 230000002159 abnormal effect Effects 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20127—Natural convection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
- H02S10/10—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power including a supplementary source of electric power, e.g. hybrid diesel-PV energy systems
- H02S10/12—Hybrid wind-PV energy systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
- H02S10/20—Systems characterised by their energy storage means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/40—Thermal components
- H02S40/42—Cooling means
- H02S40/425—Cooling means using a gaseous or a liquid coolant, e.g. air flow ventilation, water circulation
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
- H05K7/20281—Thermal management, e.g. liquid flow control
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Abstract
The invention relates to the field of power supply, in particular to a multi-aspect intelligent power supply system for islands, which is provided with a wind power generation module, a photovoltaic power generation module, an energy storage module, a cooling module and an upper computer, wherein the upper computer judges the starting mode of each circulating pipeline of the cooling module based on the temperature of the output end of a first cooling unit and the average temperature of each energy storage unit, calculates a cooling characterization value based on the temperature of the photovoltaic power generation unit and the wind speed, and controls each cooling pipeline to be started, and controls the operation parameters of each cooling pipeline when the cooling pipeline is started, and comprises the steps of adjusting the circulating rate of the first cooling pipeline based on the cooling characterization value; adjusting the circulation rate of the second cooling pipeline based on the difference between the temperature of the input end of the second cooling unit and the average temperature of each energy storage unit; the invention can effectively improve the energy conversion efficiency, effectively utilize the energy generated by photovoltaic power generation, and improve the working efficiency and the practicability of the intelligent power supply system.
Description
Technical Field
The invention relates to the field of power supply, in particular to a multi-aspect intelligent power supply system for islands.
Background
The island is located in the south China sea, is far away from land, is difficult to send by public power grid, and is difficult to use electricity in daily life and equipment of a certain unit. If a remote cross-sea power transmission network is adopted or submarine cables are laid, the cost is huge no matter the front-stage investment or the rear-stage maintenance is carried out, and the economic benefit is not met.
The island is provided with sufficient solar radiation resources and wind power resources, a solar wind power generation system is arranged on the island, natural clean energy is comprehensively utilized, the electricity consumption requirements of loads such as illumination, living electrical appliances, electronic equipment, sea water desalination treatment arrangement and the like of a standing island unit can be met, and the ecological environment of the island can be effectively protected.
Chinese patent publication No.: CN115800311a discloses a sea island wind-solar-diesel storage power supply system and a control method thereof. The island power supply system comprises an energy management unit, a coordination controller, a distributed energy storage wind power generation unit, a distributed energy storage photovoltaic power generation unit, a centralized energy storage unit and a diesel power generation unit. In order to improve primary frequency modulation and capacity and response rate of stabilizing fan/photovoltaic output power fluctuation of an island power supply system, a stepped power output control method is provided aiming at different amplitude power deviation amounts. According to the characteristics of different components of energy difference existing in the distributed energy storage system, a plurality of charge and discharge mode switching modes of the energy storage battery are provided. According to the technical scheme, the fluctuation of the output power of the fan/photovoltaic and the fluctuation of the voltage frequency of the alternating current bus can be effectively stabilized, the transient stress of primary frequency modulation current of the alternating current side centralized energy storage unit, the probability of overcurrent faults and the charge-discharge conversion times of the energy storage battery are reduced, and the stability, the renewable energy utilization rate and the service life of the energy storage battery of the whole power supply system are improved.
However, the prior art has the problem that the utilization of heat generated in the photovoltaic power generation and energy storage processes is not considered, and the energy utilization efficiency is low.
Disclosure of Invention
In order to solve the problem that the utilization of heat generated in the photovoltaic power generation and energy storage processes is not considered in the prior art and the energy utilization efficiency is low, the invention provides a multi-aspect intelligent power supply system for islands, which comprises:
the wind energy generation module is used for converting wind energy into electric energy;
the photovoltaic power generation module comprises a photovoltaic power generation unit for converting light energy into electric energy and a first cooling unit arranged on one side of the photovoltaic power generation unit for cooling the photovoltaic power generation unit;
the energy storage module is connected with the wind power generation module and comprises a plurality of energy storage units used for storing electric energy generated by the wind power generation module and the photovoltaic power generation module and a second cooling unit used for cooling each energy storage unit;
the cooling module comprises a first cooling pipeline, a second cooling pipeline and a third cooling pipeline, wherein the first cooling pipeline is sequentially connected with the output end of the first cooling unit, the input end of the heat exchange module, the output end of the heat exchange module and the input end of the first cooling unit;
the second cooling pipeline is sequentially connected with the output end of the first cooling unit, the input end of the second cooling unit, the output end of the second cooling unit and the output end of the heat exchange module;
the third cooling pipeline is sequentially connected with the output end and the input end of the first cooling unit;
the heat exchange module is connected with the user end and is used for exchanging heat of a medium in the first cooling pipeline or the second cooling pipeline into the medium input by the user end;
the upper computer is connected with the cooling module and comprises an operation unit and a control unit,
the operation unit is used for judging the starting mode of each circulating pipeline based on the temperature of the output end of the first cooling unit and the average temperature of each energy storage unit, wherein,
under a first preset condition, starting a first cooling pipeline;
under a second preset condition, starting a second cooling pipeline;
under a third preset condition, starting a third cooling pipeline;
the control unit is configured to control an operating parameter of each of the cooling circuits when each of the cooling circuits is activated, including,
calculating a cooling characterization value based on the temperature and the wind speed of the photovoltaic power generation unit, and adjusting the circulation rate of the first cooling pipeline based on the cooling characterization value;
or, adjusting the circulation rate of the second cooling pipeline based on the difference between the temperature of the input end of the second cooling unit and the average temperature of each energy storage unit.
Further, the control unit stores a determination condition for determining the activation mode of each circulation line, wherein,
the first preset condition is that the detection module detects that the temperature of the output end of the first cooling unit is higher than a preset first temperature value;
the second preset condition is that the detection module detects that the temperature of the output end of the first cooling unit is lower than or equal to a preset first temperature value and the detection module detects that the average temperature of the energy storage unit is higher than a preset second temperature value;
the third preset condition is that the detection module detects that the temperature of the output end of the first cooling unit is lower than a preset first temperature value and the detection module detects that the average temperature of the energy storage unit is lower than a preset second temperature value.
Further, the control unit calculates a cooling characterization value based on the temperature of the photovoltaic power generation unit and the wind speed, the cooling characterization value is calculated according to formula (1),
B＝T/T 0 +V 0 /V(1)
in the formula (1), B represents a cooling characteristic value, T represents a temperature of the photovoltaic power generation unit, T0 represents a temperature of the preset photovoltaic power generation unit, V represents a current wind speed, and V0 represents a preset wind speed.
Further, the control unit adjusts the circulation rate of the first cooling pipeline based on the cooling characterization value, wherein the control unit is provided with a plurality of adjustment modes for adjusting the circulation rate of the first cooling pipeline based on the cooling characterization value,
wherein, the adjustment amount of the circulation rate of the first cooling pipeline is different for each adjustment mode.
Further, the control unit adjusts the circulation rate of the second cooling pipeline based on the difference between the temperature of the input end of the second cooling unit and the average temperature of each energy storage unit, wherein the control unit is provided with a plurality of adjustment modes for adjusting the circulation rate of the second cooling pipeline based on the difference between the temperature of the input end of the second cooling unit and the average temperature of each energy storage unit,
wherein, the adjustment amount of the circulation rate of the second cooling pipeline is different for each adjustment mode.
Further, the air conditioner further comprises an air ventilation unit, wherein the air ventilation unit is used for cooling the energy storage unit through natural wind, and comprises a ventilation hole and a ventilation channel connected with the ventilation hole, so that wind is introduced into the ventilation channel and blown to the energy storage unit after the ventilation hole is opened.
Further, the control unit is further configured to open the ventilation hole of the ventilation unit under a preset condition, wherein,
the preset condition is that the control unit controls the second cooling pipeline to be opened, and the detection module detects that the average temperature of the energy storage unit is higher than a preset third temperature value after the second cooling pipeline is opened for a preset first time period.
Further, the first cooling unit includes an input end, an output end, and a cooling pipe connected to the input end and the output end, and a heat transfer medium is disposed around the cooling pipe.
Further, the second cooling unit comprises an input end, an output end and a radiating pipe, wherein the radiating pipe surrounds the energy storage unit in a spiral shape so as to transfer heat in the energy storage unit into the cooling pipe.
Further, the wind power generation system further comprises a detection module, wherein the detection module comprises a temperature sensor arranged at the output end of the first cooling unit, each energy storage unit and the output end of the photovoltaic power generation unit, and a wind speed sensor arranged at the wind power generation module.
Compared with the prior art, the wind power generation system comprises the wind power generation module, the photovoltaic power generation module, the energy storage module, the cooling module and the upper computer, wherein the upper computer judges the starting mode of each circulating pipeline of the cooling module based on the temperature of the output end of the first cooling unit and the average temperature of each energy storage unit, calculates a cooling characterization value based on the temperature of the photovoltaic power generation unit and the wind speed, and controls each cooling pipeline to start and control the operation parameters of each cooling pipeline when the cooling pipeline is started, and comprises the steps of adjusting the circulating rate of the first cooling pipeline based on the cooling characterization value; adjusting the circulation rate of the second cooling pipeline based on the difference between the temperature of the input end of the second cooling unit and the average temperature of each energy storage unit; the invention can effectively improve the energy conversion efficiency, effectively utilize the energy generated by photovoltaic power generation, and improve the working efficiency and the practicability of the intelligent power supply system.
Particularly, the starting mode of each circulating pipeline is judged based on the temperature of the output end of the first cooling unit and the average temperature of each energy storage unit, three cooling pipelines are started under three preset conditions respectively, when the temperature of the output end of the first cooling unit is high, the first cooling pipeline is started and can directly transmit heat to the heat exchange module, and the first cooling pipeline is difficult to continuously pass through the energy storage unit to achieve the effect of reducing the temperature of the energy storage unit; when the temperature of the output end of the first cooling unit is lower, but the average temperature of the energy storage unit is higher, a cooling pipeline capable of passing through the energy storage unit can be started to reduce the temperature of the energy storage unit; when the temperature of the output end of the first cooling unit is lower and the average temperature of the energy storage unit is also lower, enabling a third cooling pipeline which does not pass through the conversion module and the energy storage unit to continue to be led into the photovoltaic power generation module, and cooling the photovoltaic power generation module; according to the starting of different cooling pipelines, the working efficiency of the cooling pipelines can be improved, and the practicability of the intelligent power supply system is improved.
In particular, the circulation rate of the first cooling pipeline is adjusted based on the cooling characterization value, the cooling characterization value considers the temperature of the photovoltaic power generation unit and the cooling effect or trend of the wind speed on the photovoltaic power generation unit, when the wind speed is higher, the temperature of the photovoltaic power generation unit can be quickly reduced by superposing the cooling effect of the first cooling unit, and further the heat exchange efficiency of the first cooling unit and the photovoltaic power generation unit can be reduced due to the quick temperature reduction trend on the microcosmic heat exchange layer, so that the circulation rate of the circulation pipeline is adaptively adjusted based on the cooling characterization value, and the energy conversion efficiency is improved.
In particular, the circulation rate of the second cooling pipeline is adjusted through the difference value between the temperature of the input end of the second cooling unit and the average temperature of each energy storage unit, and when the difference value is large, the second cooling unit has a remarkable effect of reducing the temperature of the energy storage units, and at the moment, the circulation rate of the second cooling pipeline is reduced, so that heat exchange can be ensured, and heat loss caused by circulation can be reduced; when the difference value is smaller, the effect of the second cooling unit on reducing the temperature of the energy storage unit is less obvious, and at the moment, the circulation rate of the second cooling pipeline can be properly increased, so that the circulation rate is improved, and the working efficiency of the intelligent power supply system is improved.
Particularly, the ventilation unit is arranged on the energy storage unit, and is started when the temperature of the energy storage unit is high, so that the second cooling pipeline can be assisted to reduce the temperature of the energy storage unit, the situation that the energy storage unit is at a high temperature for a long time and the intelligent power supply system is abnormal is prevented, and the stability and the working efficiency of the intelligent power supply system are improved.
Drawings
FIG. 1 is a schematic diagram of the connection of various pipelines of a cooling module of a multi-aspect intelligent power supply system for islands in an embodiment of the invention
FIG. 2 is a block diagram of a system architecture of an intelligent power supply system for islands in the sea in accordance with an embodiment of the invention.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1 and 2, fig. 1 is a schematic diagram illustrating connection of pipelines of a cooling module of a multi-aspect intelligent power supply system for islands according to an embodiment of the present invention, and fig. 2 is a block diagram illustrating a structure of a multi-aspect intelligent power supply system for islands according to an embodiment of the present invention, where the multi-aspect intelligent power supply system for islands includes:
the wind energy generation module is used for converting wind energy into electric energy;
the photovoltaic power generation module comprises a photovoltaic power generation unit for converting light energy into electric energy and a first cooling unit arranged on one side of the photovoltaic power generation unit for cooling the photovoltaic power generation unit;
the energy storage module is connected with the wind power generation module and comprises a plurality of energy storage units used for storing electric energy generated by the wind power generation module and the photovoltaic power generation module and a second cooling unit used for cooling each energy storage unit;
the cooling module comprises a first cooling pipeline, a second cooling pipeline and a third cooling pipeline, wherein the first cooling pipeline is sequentially connected with the output end of the first cooling unit, the input end of the heat exchange module, the output end of the heat exchange module and the input end of the first cooling unit;
the second cooling pipeline is sequentially connected with the output end of the first cooling unit, the input end of the second cooling unit, the output end of the second cooling unit and the output end of the heat exchange module;
the third cooling pipeline is sequentially connected with the output end and the input end of the first cooling unit;
the heat exchange module is connected with the user end and is used for exchanging heat of a medium in the first cooling pipeline or the second cooling pipeline into the medium input by the user end;
the upper computer is connected with the cooling module and comprises an operation unit and a control unit,
the operation unit is used for judging the starting mode of each circulating pipeline based on the temperature of the output end of the first cooling unit and the average temperature of each energy storage unit, wherein,
under a first preset condition, starting a first cooling pipeline;
under a second preset condition, starting a second cooling pipeline;
under a third preset condition, starting a third cooling pipeline;
the control unit is configured to control an operating parameter of each of the cooling circuits when each of the cooling circuits is activated, including,
calculating a cooling characterization value based on the temperature and the wind speed of the photovoltaic power generation unit, and adjusting the circulation rate of the first cooling pipeline based on the cooling characterization value;
or, adjusting the circulation rate of the second cooling pipeline based on the difference between the temperature of the input end of the second cooling unit and the average temperature of each energy storage unit.
Specifically, the specific structure of the photovoltaic power generation module and the wind power generation module is not limited, the wind power generation module can be a wind driven generator, the photovoltaic power generation unit in the photovoltaic power generation module is a photovoltaic plate, the cooling unit is attached to the photovoltaic plate and used for radiating the photovoltaic plate, and the photovoltaic plate and the wind driven generator are all of the prior art and are not described repeatedly.
Specifically, the specific structure of the upper computer is not limited, and the upper computer may be formed by a logic component, where the logic component includes a microcontroller, a processor, or a field programmable component, which is in the prior art and is not described herein again.
Specifically, the switching manner of the pipelines is not limited, in this embodiment, a three-way valve may be provided at the output end of the first cooling unit, so that the medium flowing out of the first cooling pipeline flows into different cooling pipelines by controlling the opening and closing of the valve, and for other connection parts, a person skilled in the art can select the corresponding valve according to the number of pipelines, which is not repeated here.
Specifically, the power for medium circulation in the pipeline can be provided by various power pumps, and the circulation rate can be adjusted by adjusting the power of the pump body so as to adjust the circulation rate.
Specifically, the wind power generation system further comprises a detection module, wherein the detection module comprises a temperature sensor arranged at the output end of the first cooling unit, each energy storage unit and the output end of the photovoltaic power generation unit, and a wind speed sensor arranged at the wind power generation module.
Specifically, the specific structure of the heat exchange module is not limited, the heat exchange module can be one medium heat exchanger, the existing medium heat exchangers are multiple, and only the requirement of converting the heat of an input medium into another medium is met, for example, part of the medium heat exchangers in the prior art are provided with two winding pipelines, the input end of one pipeline is connected with a medium with higher temperature, and the input end of the other pipeline is connected with a medium with lower temperature so as to realize heat exchange of the medium.
Specifically, the control unit stores a determination condition for determining the activation mode of each circulation line, wherein,
the first preset condition is that the detection module detects that the temperature of the output end of the first cooling unit is higher than a preset first temperature value;
the second preset condition is that the detection module detects that the temperature of the output end of the first cooling unit is lower than or equal to a preset first temperature value and the detection module detects that the average temperature of the energy storage unit is higher than a preset second temperature value;
the third preset condition is that the detection module detects that the temperature of the output end of the first cooling unit is lower than a preset first temperature value and the detection module detects that the average temperature of the energy storage unit is lower than a preset second temperature value.
In this embodiment, a preset first temperature value is set based on a heat exchange requirement, where the first temperature value is a temperature value that can meet the heat exchange requirement of the heat exchange module and provides a required temperature for a user terminal;
the preset second temperature value is lower than the preset first temperature value, which is determined based on the first temperature value, and is set in this embodiment with t2=t1×α, α representing a temperature reduction coefficient, which is set within the interval [0.4,0.6 ].
Specifically, the starting mode of each circulating pipeline is judged based on the temperature of the output end of the first cooling unit and the average temperature of each energy storage unit, three cooling pipelines are started under three preset conditions respectively, when the temperature of the output end of the first cooling unit is high, the first cooling pipeline is started and can directly transmit heat to the heat exchange module, and the first cooling pipeline is difficult to continuously pass through the energy storage unit to achieve the effect of reducing the temperature of the energy storage unit; when the temperature of the output end of the first cooling unit is lower, but the average temperature of the energy storage unit is higher, a cooling pipeline capable of passing through the energy storage unit can be started to reduce the temperature of the energy storage unit; when the temperature of the output end of the first cooling unit is lower and the average temperature of the energy storage unit is also lower, enabling a third cooling pipeline which does not pass through the conversion module and the energy storage unit to continue to be led into the photovoltaic power generation module, and cooling the photovoltaic power generation module; the working efficiency of the cooling pipeline can be improved according to the starting of different cooling pipelines.
Specifically, the first cooling unit includes an input end, an output end, and a cooling pipe connected to the input end and the output end, and a heat-conducting medium is disposed around the cooling pipe, and in this embodiment, the first cooling unit may be disposed on the photovoltaic power generation unit to carry away heat of the photovoltaic power generation unit through a medium having a lower temperature flowing through the cooling pipe.
Specifically, the second cooling unit includes an input end, an output end, and a heat dissipating tube surrounding the energy storage unit in a spiral shape to transfer heat in the energy storage unit into the cooling tube.
Specifically, the control unit calculates a cooling characteristic value based on the temperature of the photovoltaic power generation unit and the wind speed, the cooling characteristic value is calculated according to formula (1),
B＝T/T 0 +V 0 /V(1)
in the formula (1), B represents a cooling characteristic value, T represents a temperature of the photovoltaic power generation unit, T0 represents a temperature of the preset photovoltaic power generation unit, V represents a current wind speed, and V0 represents a preset wind speed.
Specifically, T0 is set based on an optimal temperature interval for normal operation of the photovoltaic power generation unit, where T0 is 40 degrees celsius in this embodiment, and V0 is 8m/s in this embodiment.
In particular to a control unit which adjusts the circulation rate of the first cooling pipeline based on the cooling characterization value, wherein the control unit is provided with a plurality of adjustment modes which adjust the circulation rate of the first cooling pipeline based on the cooling characterization value,
wherein, the adjustment amount of the circulation rate of the first cooling pipeline is different for each adjustment mode.
In this embodiment, at least three circulation rate adjustment modes are set, wherein the control unit compares the cooling characterization value B with a preset first cooling characterization reference value B1 and a preset second cooling characterization reference value B2, B2 > B1,
if B is less than or equal to B1, the control unit adopts a first circulation rate adjustment mode of the first cooling pipeline, wherein the first circulation rate adjustment mode of the first cooling pipeline is to adjust the circulation rate of the cooling medium in the first cooling pipeline to a first circulation rate value S1 of the first cooling pipeline, and s1=s0+Δs1 is set;
if B1 is smaller than B2, the control unit adopts a first cooling pipeline second circulation rate adjustment mode, wherein the first cooling pipeline second circulation rate adjustment mode is to adjust the circulation rate of the cooling medium in the first cooling pipeline to a first cooling pipeline second circulation rate value S2, and s2=s0+Δs2 is set;
if B is more than or equal to B2, the control unit adopts a first cooling pipeline third circulation rate adjustment mode, wherein the first cooling pipeline third circulation rate adjustment mode is to adjust the circulation rate of a cooling medium in a first cooling pipeline to a first cooling pipeline third circulation rate value S3, and S3=S0+ΔS3 is set;
wherein S0 represents an initial circulation rate of the cooling medium in the first cooling line, deltaS 1 represents a first circulation rate adjustment parameter of the first cooling line, deltaS 2 represents a second circulation rate adjustment parameter of the first cooling line, deltaS 3 represents a third circulation rate adjustment parameter of the first cooling line, in this embodiment, 1.5 < B1 < B2 < 2.5, and likewise, in order to make the adjustment effective and to avoid an excessive adjustment amount, 0.1S0 < DeltaS 3 < DeltaS 2 < DeltaS 1 < 0.3S0.
Specifically, the circulation rate of the first cooling pipeline is adjusted based on the cooling characterization value, the cooling characterization value considers the temperature of the photovoltaic power generation unit and the cooling effect or trend of the wind speed on the photovoltaic power generation unit, when the wind speed is higher, the temperature of the photovoltaic power generation unit can be quickly reduced by superposing the cooling effect of the first cooling unit, and further the heat exchange efficiency of the first cooling unit and the photovoltaic power generation unit can be reduced due to the quick temperature reduction trend on the microcosmic heat exchange layer, so that the circulation rate of the circulation pipeline is adaptively adjusted based on the cooling characterization value, and the energy conversion efficiency is improved.
Specifically, the control unit adjusts the circulation rate of the second cooling pipeline based on the difference between the temperature of the input end of the second cooling unit and the average temperature of each energy storage unit, wherein the control unit is provided with a plurality of adjustment modes for adjusting the circulation rate of the second cooling pipeline based on the difference between the temperature of the input end of the second cooling unit and the average temperature of each energy storage unit,
wherein, the adjustment amount of the circulation rate of the second cooling pipeline is different for each adjustment mode.
In this embodiment, at least three circulation rate adjustment modes are set, wherein the control unit compares a difference Δt between the temperature of the input end of the second cooling unit and the average temperature of each of the energy storage units with a preset first difference reference value Δt1 and a preset second difference reference value Δt2, Δt2 > Δt1,
if Δt is less than or equal to Δt1, the control unit adopts a second cooling pipeline first circulation rate adjustment manner, where the second cooling pipeline first circulation rate adjustment manner is to adjust a circulation rate of a cooling medium in the second cooling pipeline to a second cooling pipeline first circulation rate value X1, and x1=x0+Δx1 is set;
if Δt1 is less than Δt2 and Δt1 is less than Δt2, the control unit adopts a second cooling pipeline second circulation rate adjustment mode, and the second cooling pipeline second circulation rate adjustment mode is to adjust the circulation rate of the cooling medium in the second cooling pipeline to a second cooling pipeline second circulation rate value X2, and x2=x0- Δx2 is set;
if delta T is more than or equal to delta T2, the control unit adopts a second cooling pipeline third circulation rate adjustment mode, wherein the second cooling pipeline third circulation rate adjustment mode is to adjust the circulation rate of a cooling medium in a second cooling pipeline to a second cooling pipeline third circulation rate value X3, and X3 = X0-delta X3 is set;
wherein X0 represents the initial circulation rate of the cooling medium in the second cooling circuit, deltaX 1 represents the first circulation rate adjustment parameter of the second cooling circuit, deltaX 2 represents the second circulation rate adjustment parameter of the second cooling circuit, deltaX 3 represents the third circulation rate adjustment parameter of the second cooling circuit, in this embodiment 0.3X120 < DeltaT 1 < 0.5X120 < DeltaT 2 < 0.7X120, T20 represents the temperature at the input end of the second circulation circuit, and likewise, in order to make the adjustment efficient and avoid excessive adjustment, 0.2X0 < DeltaX 1 < 0.4X0,0.2X0 < DeltaX 2 < DeltaX 3 < 0.4X0.
Specifically, the circulation rate of the second cooling pipeline is adjusted through the difference value between the temperature of the input end of the second cooling unit and the average temperature of each energy storage unit, when the difference value is large, the effect of the second cooling unit on reducing the temperature of the energy storage units is remarkable, and at the moment, the circulation rate of the second cooling pipeline is reduced, so that heat exchange can be guaranteed, and heat loss caused by circulation can be reduced; when the difference value is smaller, the effect of the second cooling unit on reducing the temperature of the energy storage unit is less obvious, and at the moment, the circulation rate of the second cooling pipeline can be properly increased, so that the circulation rate is improved, and the working efficiency of the intelligent power supply system is improved.
Specifically, still include ventilation unit, ventilation unit is used for cooling down energy storage unit through the natural wind, ventilation unit include the ventilation hole and with the ventilation passageway that the ventilation hole is connected to make the ventilation hole open the back with wind is introduced in the ventilation passageway and is blown to energy storage unit, in this embodiment, the ventilation hole can set up at the lateral wall or the factory building top of placing energy storage unit, and then can introduce external natural wind through the ventilation hole and assist the cooling to energy storage unit.
In particular, the control unit is also configured to open the ventilation holes of the ventilation unit under preset conditions, wherein,
the preset condition is that the control unit controls the second cooling pipeline to be opened, and the detection module detects that the average temperature of the energy storage unit is higher than a preset third temperature value after the second cooling pipeline is opened for a preset first time period.
Specifically, in the present embodiment, the preset third temperature value T3 is set based on the safe temperature zone of the energy storage unit, and t3=0.8te is set in the present embodiment, where te represents the upper limit of the safe temperature zone.
Specifically, the ventilation unit is arranged on the energy storage unit, and is started when the temperature of the energy storage unit is high, so that the second cooling pipeline can be assisted to reduce the temperature of the energy storage unit at the same time, the situation that the energy storage unit is at a high temperature for a long time and the intelligent power supply system is abnormal is prevented, and the stability and the working efficiency of the intelligent power supply system are improved.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
Claims (10)
1. A multi-aspect intelligent power supply system for islands, comprising:
the wind energy generation module is used for converting wind energy into electric energy;
the photovoltaic power generation module comprises a photovoltaic power generation unit for converting light energy into electric energy and a first cooling unit arranged on one side of the photovoltaic power generation unit for cooling the photovoltaic power generation unit;
the energy storage module is connected with the wind power generation module and comprises a plurality of energy storage units used for storing electric energy generated by the wind power generation module and the photovoltaic power generation module and a second cooling unit used for cooling each energy storage unit;
the cooling module comprises a first cooling pipeline, a second cooling pipeline and a third cooling pipeline, wherein the first cooling pipeline is sequentially connected with the output end of the first cooling unit, the input end of the heat exchange module, the output end of the heat exchange module and the input end of the first cooling unit;
the second cooling pipeline is sequentially connected with the output end of the first cooling unit, the input end of the second cooling unit, the output end of the second cooling unit and the output end of the heat exchange module;
the third cooling pipeline is sequentially connected with the output end and the input end of the first cooling unit;
the heat exchange module is connected with the user end and is used for exchanging heat of a medium in the first cooling pipeline or the second cooling pipeline into the medium input by the user end;
the upper computer is connected with the cooling module and comprises an operation unit and a control unit,
the operation unit is used for judging the starting mode of each circulating pipeline based on the temperature of the output end of the first cooling unit and the average temperature of each energy storage unit, wherein,
under a first preset condition, starting a first cooling pipeline;
under a second preset condition, starting a second cooling pipeline;
under a third preset condition, starting a third cooling pipeline;
the control unit is configured to control an operating parameter of each of the cooling circuits when each of the cooling circuits is activated, including,
calculating a cooling characterization value based on the temperature and the wind speed of the photovoltaic power generation unit, and adjusting the circulation rate of the first cooling pipeline based on the cooling characterization value;
or, adjusting the circulation rate of the second cooling pipeline based on the difference between the temperature of the input end of the second cooling unit and the average temperature of each energy storage unit.
2. The multi-aspect intelligent power supply system for islands according to claim 1, wherein the control unit stores therein a determination condition for determining the activation mode of each circulation line, wherein,
the first preset condition is that the detection module detects that the temperature of the output end of the first cooling unit is higher than a preset first temperature value;
the second preset condition is that the detection module detects that the temperature of the output end of the first cooling unit is lower than or equal to a preset first temperature value and the detection module detects that the average temperature of the energy storage unit is higher than a preset second temperature value;
the third preset condition is that the detection module detects that the temperature of the output end of the first cooling unit is lower than a preset first temperature value and the detection module detects that the average temperature of the energy storage unit is lower than a preset second temperature value.
3. The multi-aspect intelligent power supply system for islands in the sea according to claim 1, wherein the control unit calculates a cooling characterization value based on the temperature of the photovoltaic power generation unit and the wind speed, the cooling characterization value is calculated according to formula (1),
B＝T/T 0 +V 0 /V(1)
in the formula (1), B represents a cooling characteristic value, T represents the temperature of the photovoltaic power generation unit, and T 0 Representing the temperature of a preset photovoltaic power generation unit, V representing the current wind speed, V 0 Indicating a preset wind speed.
4. The multi-aspect intelligent power supply system for islands in claim 1, wherein the control unit adjusts the circulation rate of the first cooling circuit based on the cooling characterization value, wherein the control unit is provided with a number of adjustment means for adjusting the circulation rate of the first cooling circuit based on the cooling characterization value,
wherein, the adjustment amount of the circulation rate of the first cooling pipeline is different for each adjustment mode.
5. The multi-aspect intelligent power supply system for islands in claim 1 wherein the control unit adjusts the circulation rate of the second cooling circuit based on the difference between the temperature of the second cooling unit input and the average temperature of each of the energy storage units, wherein the control unit is provided with a plurality of adjustment means for adjusting the circulation rate of the second cooling circuit based on the difference between the temperature of the second cooling unit input and the average temperature of each of the energy storage units,
wherein, the adjustment amount of the circulation rate of the second cooling pipeline is different for each adjustment mode.
6. The multi-aspect intelligent power supply system for islands in the sea of claim 1 further comprising a ventilation unit for cooling the energy storage unit by natural wind, the ventilation unit comprising a ventilation hole and a ventilation channel connected to the ventilation hole such that after the ventilation hole is opened, wind is introduced into the ventilation channel and blown toward the energy storage unit.
7. The multi-aspect intelligent power supply system for islands in claim 6, wherein the control unit is further configured to open the vent of the ventilation unit under preset conditions, wherein,
the preset condition is that the control unit controls the second cooling pipeline to be opened, and the detection module detects that the average temperature of the energy storage unit is higher than a preset third temperature value after the second cooling pipeline is opened for a preset first time period.
8. The multi-aspect intelligent power supply system for islands in accordance with claim 1 wherein the first cooling unit includes an input, an output, and a cooling tube connected to the input and output, the cooling tube having a thermally conductive medium disposed therearound.
9. The multi-aspect intelligent power supply system for islands of claim 1 wherein the second cooling unit includes an input, an output, and a cooling tube that surrounds the energy storage unit in a spiral to transfer heat from the energy storage unit into the cooling tube.
10. The multi-aspect intelligent power supply system for islands of claim 1 further comprising a detection module including temperature sensors disposed on the output of the first cooling unit, each energy storage unit, and the output of the photovoltaic power generation unit, and a wind speed sensor disposed at the wind power generation module.
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| CN202310944730.6A CN116961525A (en) | 2023-07-31 | 2023-07-31 | Multi-aspect intelligent power supply system for islands |
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| CN202310944730.6A CN116961525A (en) | 2023-07-31 | 2023-07-31 | Multi-aspect intelligent power supply system for islands |
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