CN112421741A - Wind-solar complementary power generation and storage power supply device system - Google Patents
Wind-solar complementary power generation and storage power supply device system Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
- H02J7/1423—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle with multiple batteries
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/007—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations the wind motor being combined with means for converting solar radiation into useful energy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/10—Combinations of wind motors with apparatus storing energy
- F03D9/11—Combinations of wind motors with apparatus storing energy storing electrical energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00304—Overcurrent protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00308—Overvoltage protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0034—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using reverse polarity correcting or protecting circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
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- F05B2270/30—Control parameters, e.g. input parameters
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- 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
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- Y02E10/50—Photovoltaic [PV] energy
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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
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- Y02E10/72—Wind turbines with rotation axis in wind direction
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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
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
The invention provides a wind-solar complementary power generation and storage power supply device system, which comprises a power generation module, a power storage module, a monitoring module and a control module, wherein the power generation module is used for generating power and storing power; the power generation module is used for generating current in a wind power generation and solar power generation mode and transmitting the current to the power storage module; the electric storage module is used for storing the current generated by the power generation module; the monitoring module is used for monitoring the running condition and running environment of the power generation module to obtain monitoring data and transmitting the monitoring data to the control module; and the control module is used for adjusting the running state of the power generation module according to the monitoring data. The running condition and the running environment of the power generation module are monitored to obtain monitoring data, the running state of the power generation module is adjusted based on the monitoring data, the power generation module is shut down when the wind speed is too high, and the protection of a generator is facilitated when the wind speed is too high.
Description
Technical Field
The invention relates to the field of power generation, in particular to a wind-solar complementary power generation and storage power supply device system.
Background
Wind-solar hybrid is a power generation system that combines wind power generation and solar power generation and stores generated electricity in a storage battery. When electricity is needed, the electricity in the storage battery is converted into alternating current through the inverter and then is connected with a load for use. In the prior art, a plurality of wind-solar hybrid power generation systems are arranged at seaside, but because the seaside wind power condition is complex, if the wind speed is too high, the wind driven generator is easy to damage.
Disclosure of Invention
In view of the above problems, it is an object of the present invention to provide a wind-solar hybrid power generation and storage power supply device system, which includes a power generation module, a storage module, a monitoring module and a control module;
the power generation module is used for generating current in a wind power generation and solar power generation mode and transmitting the current to the power storage module; the electric storage module is used for storing the current generated by the power generation module; the monitoring module is used for monitoring the running condition and running environment of the power generation module to obtain monitoring data and transmitting the monitoring data to the control module; and the control module is used for adjusting the running state of the power generation module according to the monitoring data.
Preferably, the power generation module comprises a wind power generation unit, a solar power generation unit and a wind-solar hybrid control unit; the wind-solar hybrid control unit comprises an input end and an output end; the wind power generation unit and the solar power generation unit are respectively connected with the input end of the wind-solar hybrid control unit; and the output end of the wind-solar hybrid control unit is connected with the power storage module.
Preferably, the wind power generation unit comprises a tower, a wind power generator and a brake device; the wind driven generator is arranged at the top end of the tower; and the brake device is used for stopping the rotation of the rotating shaft of the wind driven generator.
Preferably, the monitoring module comprises a vibration monitoring submodule and a wind speed monitoring submodule; the monitoring data comprises vibration data and wind speed data; the vibration monitoring submodule is used for acquiring vibration data of the tower; and the wind speed monitoring submodule is used for acquiring wind speed data of the environment where the wind power generation unit is located.
Preferably, the wind-solar hybrid control unit comprises a wind-solar hybrid controller.
Preferably, the adjusting the operation state of the power generation module according to the monitoring data includes:
judging whether the vibration data exceed a preset normal numerical range, if so, reducing the rotating speed of the generator; if not, the rotating speed of the engine is not adjusted;
and judging whether the wind speed data exceeds a preset normal numerical range, if so, controlling the brake device to brake the transmission shaft by the control module, and stopping the rotation of the transmission shaft.
Compared with the prior art, the invention has the advantages that:
the running condition and the running environment of the power generation module are monitored to obtain monitoring data, the running state of the power generation module is adjusted based on the monitoring data, the power generation module is shut down when the wind speed is too high, and the protection of a generator is facilitated when the wind speed is too high.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.
FIG. 1 is a diagram of an exemplary embodiment of a wind-solar hybrid power generation and storage power supply system according to the present invention.
Fig. 2 is a charging diagram of a battery according to an exemplary embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
The invention provides a wind-solar complementary power generation and storage power supply device system, which comprises a power generation module, a power storage module, a monitoring module and a control module, wherein the power generation module is used for generating power and storing power;
the power generation module is used for generating current in a wind power generation and solar power generation mode and transmitting the current to the power storage module; the electric storage module is used for storing the current generated by the power generation module; the monitoring module is used for monitoring the running condition and running environment of the power generation module to obtain monitoring data and transmitting the monitoring data to the control module; and the control module is used for adjusting the running state of the power generation module according to the monitoring data.
In one embodiment, the power generation module comprises a wind power generation unit, a solar power generation unit and a wind-solar hybrid control unit; the wind-solar hybrid control unit comprises an input end and an output end; the wind power generation unit and the solar power generation unit are respectively connected with the input end of the wind-solar hybrid control unit; and the output end of the wind-solar hybrid control unit is connected with the power storage module.
In one embodiment, the wind power generation unit comprises a tower, a wind power generator and a brake device;
the wind driven generator is arranged at the top end of the tower;
and the brake device is used for stopping the rotation of the rotating shaft of the wind driven generator.
In one embodiment, the monitoring module comprises a vibration monitoring submodule and a wind speed monitoring submodule; the monitoring data comprises vibration data and wind speed data; the vibration monitoring submodule is used for acquiring vibration data of the tower; and the wind speed monitoring submodule is used for acquiring wind speed data of the environment where the wind power generation unit is located.
In one embodiment, the vibration monitoring submodule includes a sensor node and a collection node; the sensor nodes are distributed at each position of the tower and used for acquiring vibration data of the tower and sending the vibration data to the collection nodes;
the collection node is used for receiving vibration data from the sensor node and sending the vibration data to the monitoring module.
In one embodiment, the monitoring module further includes a notification sub-module, and the notification sub-module is configured to send a notification message to a maintenance worker when the abnormal working state of the sensor node is found.
In one embodiment, the notification submodule includes a determination unit and a notification unit, the determination unit is configured to determine whether the working state of the sensor node is abnormal, the notification unit is configured to send a notification message to a cloud server when the working state of the sensor node is found to be abnormal, and the cloud server is configured to push the notification message to a maintenance worker.
In one embodiment, the notification message includes the number and the location of the sensor node with abnormal operating state.
In one embodiment, whether the working state of the sensor node is abnormal is judged by the following method:
recording the sensor node as s, and sampling the vibration data acquired by the sensor node s by the collecting node to acquire sampling data;
comparing the sampled data with a comparison value, and judging whether the error between the sampled data and the comparison value is larger than a set error threshold value or not, if so, judging that the working state of the sensor node s is abnormal, otherwise, judging that the working state of the sensor node s is normal;
the control value was calculated as follows:
where csvl represents the comparison value, U represents the set of neighborhood nodes for sensor node s, sdat and sdatrRespectively representing the vibration data acquired by the sensor node r in the sensor nodes s and U,wzprrepresents the linear distance, spd, between sensor nodes r in sensor nodes s and UrRepresenting the mean of vibration data acquired by all sensor nodes in a circular area with a radius of 0.1Rma centered on sensor node r in U, Rma representing the maximum communication radius of sensor node s, spd representing the mean of vibration data acquired by all sensor nodes in a circular area with a radius of 0.1Rma centered on sensor node s, cadsd representing the standard deviation of vibration data acquired by sensor nodes in U, cadwz representing the standard deviation of the linear distance between a sensor node in U and a sensor node s,
where numU represents the total number of sensor nodes in U.
In the embodiment of the invention, when the comparison value is calculated, the difference between the neighborhood node of s and the average value of the vibration data acquired by s in the aspects of the collected vibration data, the linear distance, the vibration data acquired by the neighborhood node and the like is considered, the different reference values of the sensor nodes at different positions in U are comprehensively reflected, and the reference value is smaller for the sensor nodes at the farther distance from s in U, so that the weight is smaller in the process of weighted summation. Compared with the traditional mean value taking mode, the mode for calculating the reference value has more adaptivity and the reference value result is more accurate. The sensor node with abnormal working state can be found in time, and the influence of false detection on the wind power generation unit is avoided.
In one embodiment, the time interval for the sensor node s to acquire vibration data is determined by:
the sensor node s estimates its vibration data acquired k-th time using the following model:
csdatak＝c1×zsdatak-1+c2×(csdatak-1+bck-1)
bck-1＝d1(zsdatak-1-zsdatak-2)+d2×bck-2
in the formula csdatakVibration data representing the k-th acquisition of the sensor node s estimate, c1And c2Representing a weight parameter, c1+c2＝1，zsdatak-1Represents the vibration data, csdata, acquired at the k-1 th time of the sensor node sk-1Representing the vibration data, bc, of its k-1 th acquisition of the sensor node s estimatek-1Is csdatakCorrection parameter of d1And d2Representing a weight parameter, d1+d2＝1，zsdatak-2Representing the vibration data acquired from the k-2 th time of the sensor node s, k is more than or equal to 3, bck-2Is csdatak-1The correction parameter of (1);
calculating the time interval of two adjacent times of acquiring the vibration data by the following method:
in the formula, tkRepresenting the time interval between the k-1 th and k-th acquisition of vibration data, zsdata, of the sensor node skRepresenting the vibration data acquired the kth time at sensor node s,
wherein Thre is a preset comparison threshold value, tk-1Representing the time interval, sp, between the k-2 th and k-1 st acquisition of vibration data by the sensor node sk-1Representing the wind speed measured when the sensor node s acquires vibration data the k-1 st time.
In the above embodiment of the present invention, the time interval between two adjacent times of acquiring the vibration data of the sensor node s is not fixed, and the fixed time interval is not beneficial to saving the electric quantity of the sensor node, for example, when there is no wind or the wind is small, the tower has almost no vibration, and if the fixed time interval is still adopted, it is obviously not suitable, because the vibration of the tower is small and has almost no change. And calculating parameters such as an estimated value, a true value, the wind speed during acquisition and the like to obtain the time interval between two adjacent times of acquiring the vibration data through the estimation of the vibration data. When the wind speed changes greatly, the time interval is shortened, the vibration data are acquired more frequently, and when the wind speed changes less, the time interval is enlarged, so that the electric quantity of the sensor node can be saved, and the self-adaptive adjustment between the time interval and the wind speed is realized. The electricity is consumed in the more useful phase, i.e. the phase where the wind speed changes more. The service life of the sensor node is prolonged, and meanwhile, the vibration of the tower can be effectively monitored. The vibration data is acquired for the first time and the second time, the invention is not particularly limited, and the time interval can be set by a person skilled in the art according to actual needs.
In one embodiment, the sensor nodes are divided into member nodes and cluster head nodes in a clustering manner; the member nodes are used for acquiring vibration data of the tower and sending cluster head nodes; the cluster head node is used for forwarding the vibration data to a collection node.
In one embodiment, the cluster head node selects a communication mode with the collection node by:
if the straight-line distance between the cluster head node and the collection node is smaller than the selection threshold, the cluster head node sends the vibration data to the collection node in a single-hop transmission mode;
and if the straight-line distance between the cluster head node and the collection node is larger than or equal to the selection threshold, the cluster head node sends the vibration data to the collection node in a multi-hop transmission mode.
In one embodiment, the selection threshold is generated by:
the collection node calculates the state index change rate of the sensor node at fixed time intervals, and if the state index change rate is larger than a set change rate threshold value, the selection threshold value is recalculated;
the state index change rate is calculated as follows:
in the formula, bhiiIndicating the state index change rate, a, obtained by the i-th calculation1Denotes a weight parameter, numlowav,iAnd numlowav,i-1Respectively representing the number num of the sensor nodes with the residual capacity lower than the average residual capacity of all the sensor nodes when the state index change rate is calculated for the ith time and the (i-1) th timetotalIndicates the total number of sensor nodes, numdead,iAnd numdead,i-1Respectively representing the total number of the sensor nodes with the electric quantity consumption completed in all the sensor nodes of which the linear distance between the sensor nodes and the collection node is less than di when the state index change rate is calculated for the ith time and the (i-1) th time; bhi1＝0；
The selection threshold is calculated as follows:
in the formula, xidxjAnd xidxj-1Respectively representing the selection thresholds, dmi, calculated for the j-th and j-1-th recalculationsnodeAnd dmanodeRespectively representing the minimum value and the maximum value of the communication signal strength between the neighborhood nodes of the sensor node and the node, b representing a preset adjusting coefficient, wherein the node belongs to sneiU which represents the set of all the sensor nodes within the maximum communication radius of the collection node, fmi represents the minimum value in brackets, and fma represents the maximum value in brackets; xidx1＝0；
And if the selection threshold reaches the preset maximum value, recalculating the selection threshold.
With the increase of time, the selection threshold is continuously reduced, the sensor nodes within the maximum communication radius range of the collection nodes are gradually switched from a multi-hop transmission mode to a single-hop transmission mode to communicate with the collection nodes, so that the forwarding data volume of the sensor nodes closer to the collection is reduced, the phenomenon that the sensor nodes closer to the collection lose monitoring capability and forwarding capability due to the fact that the sensor nodes consume electric quantity too fast is avoided, and the coverage range of the vibration monitoring submodule is favorably ensured. The state index change rate is obtained from the data such as the number of the sensor nodes, the total number of the sensor nodes, the linear distance and the like, of which the residual electric quantity of the adjacent two states is lower than the average residual electric quantity of all the sensor nodes, and the electric quantity consumption conditions of all the sensor nodes and the extinction conditions of the sensor nodes are comprehensively reflected. When the electricity consumption is too fast and the increasing speed of the number of sensor nodes losing the working capacity is too fast, the collecting nodes can timely find the situation through comparison with the change rate threshold value, and start recalculation of the selection threshold value, change the transmission routes of the sensor nodes, balance the energy consumption of all the sensor nodes and prolong the storage time of the sensor nodes. The vibration data can be timely and comprehensively acquired.
In one embodiment, the wind-solar hybrid control unit comprises a wind-solar hybrid controller.
In one embodiment, the adjusting the operation state of the power generation module according to the monitoring data includes:
judging whether the vibration data exceed a preset normal numerical range, if so, reducing the rotating speed of the generator; if not, the rotating speed of the engine is not adjusted;
and judging whether the wind speed data exceeds a preset normal numerical range, if so, controlling the brake device to brake the transmission shaft by the control module, and stopping the rotation of the transmission shaft.
In one embodiment, the power storage module includes a battery.
In one embodiment, the solar power unit comprises a solar panel.
In one embodiment, the wind-solar hybrid control unit comprises a charge unloading subunit, a voltage limiting and current limiting subunit, a liquid crystal display subunit, an input subunit, a protection subunit and a communication subunit;
the charge unloading subunit is used for unloading and releasing redundant electric energy when the electric energy generated by the power generation module exceeds the requirement of the storage battery;
when the electric energy generated by the solar panel and the wind driven generator exceeds the requirement of the storage battery, the control system must release the redundant electric energy through unloading. The common control mode is that the whole unloading is connected completely, at the moment, the storage battery is not fully charged, but the electric energy is completely consumed on the unloading, so that the waste of the electric energy is caused. And in some cases, unloading is connected in stages, the more stages are, the better the control effect is, but only about five and six stages can be achieved, so the effect is still not ideal. The invention adopts PWM (pulse width modulation) control mode to carry out stepless unloading, and can achieve 256-level unloading. Under the normal unloading condition, the redundant electric energy is only released to the unloading, and the voltage of the storage battery can be ensured to be always stabilized at a floating charge voltage point. Thereby ensuring the best charging characteristic of the storage battery, fully utilizing the electric energy and ensuring the service life of the storage battery.
The voltage-limiting current-limiting subunit is used for controlling the charging current and the charging voltage input into the storage battery, so that the storage battery is prevented from being seriously damaged due to overlarge charging current and charging voltage;
since the secondary battery can only withstand a certain range of charging current and charging voltage, the secondary battery is seriously damaged by both overcharge current and overvoltage charging. The invention limits the charging voltage and the charging current of the storage battery by detecting the charging voltage and the charging current of the storage battery in real time and controlling the generating current of the wind power generating unit and the solar power generating unit, thereby ensuring the service life of the storage battery.
The display subunit is used for displaying the state parameters of the power generation and storage power supply device system through an LCD screen;
the state parameters comprise storage battery voltage, wind driven generator voltage, solar panel voltage, wind driven generator current, solar panel current, load current, output control mode, time control time, light-operated on/off voltage point, daytime or night state indication, load state indication, storage battery overvoltage indication, storage battery undervoltage indication, overload indication and short circuit indication.
The input subunit is used for controlling a connecting circuit of the storage battery and the solar panel and a connecting circuit of the storage battery and the wind driven generator, and the control modes comprise normally open, normally closed, a light-operated switch and a time-operated switch.
The protection subunit is used for protecting the power generation and storage power supply device system, and the protection comprises solar anti-reverse charging protection, lightning protection and storage battery reverse connection protection;
the reverse charging prevention protection means that the voltage of the storage battery may be higher than the terminal voltage of the solar cell panel under the condition of poor light at night and the like. The protection subunit is provided with an anti-reverse charging circuit to prevent the storage battery from generating reverse charging on the solar cell panel;
the lightning protection refers to that instantaneous strong voltage and current generated by thunder and lightning can damage the power generation and storage power supply device system, and the protection subunit is provided with a high-voltage unloading device which can release the instantaneous strong voltage and current generated by thunder and lightning and protect the power generation and storage power supply device system;
the protection subunit of the invention also comprises a fuse arranged in the charging loop of the storage battery, wherein the fuse is used for fusing automatically when the circuit of the storage battery is reversely connected, thereby disconnecting the charging loop of the storage battery and protecting the storage battery.
The communication sub-unit comprises an RS232 data communication interface used for the wind-solar hybrid control unit to communicate with other equipment.
In one embodiment, the functions that the wind-solar hybrid control unit can realize further include:
low wind speed boost charging is used for improving the charging function under low voltage;
optimizing solar power, and realizing maximum utilization of a solar panel by MPPT maximum power tracking;
and the storage battery management is used for activating the vulcanized battery by using negative pulses for the storage battery which is used for a long time, so that the capacity of the battery is effectively increased, and the service life of the battery is prolonged.
Further describing the embodiment of the present invention by taking a 400w standby power supply as an example, the wind-solar hybrid power supply system is designed as a 24V power supply system. It should be noted that this is only an exemplary embodiment, and it is not intended to limit the specific size and model specification of the various components of the system, and those skilled in the art can set the various components of other sizes and model specifications to meet the actual needs.
The single-node voltage of the storage battery is 12V, and the number of the series-connected nodes of the storage battery group is 24V/12V or 2.
The capacity of the storage battery is calculated according to the 12h discharge depth 70% with weak wind and no light of the used electric quantity:
the total capacity of the storage battery is (400Wh 12/0.70)/24V is 285.71 Ah.
Since the capacity of the battery is 150Ah per unit, the number of parallel battery banks is 285.71Ah/150Ah is 1.9 banks, and since the number of banks is an integer, the number of parallel banks is 2 banks.
The actual total number of the storage batteries is the number of parallel groups, the number of series sections is 2, 2 and 4 sections.
The model specification of the storage battery is as follows:
the wind power generation unit comprises one of an NE-300M type wind power generator, an NE-500M2 type wind power generator and an H530plus type wind power generator.
The charging curve of the battery is shown in fig. 2. The charging process of the storage battery comprises three stages: a constant current charging stage, a constant voltage charging stage and a trickle charging stage. In the constant current charging stage, charging is carried out by a constant charging current between 0.1CA and 0.12CA, and the charging voltage is transferred to the constant voltage charging stage after rising to 14.2V. In the constant-voltage charging stage, the charging voltage adopted is 14.2V, and after the charging current is reduced to 0.03CA, the trickle charging stage is entered. In the trickle charging stage, constant voltage is adopted for charging, and the value range of the constant voltage is 13.5V-13.7V.
The electric quantity is charged from 0% to 100%, and the charging time is about 10.5 hours.
The NE-300M type wind driven generator and the NE-500M2 type wind driven generator have the following characteristics:
1) the wind power generation system uses natural green energy and does not need external power such as commercial power and the like, so that a power supply cable does not need to be buried or erected.
2) The wind generating set blade is made of nylon fiber and has good toughness. High wind energy utilization rate and low running noise. The impeller is subjected to dynamic balance treatment, so that the quiet and stable operation is ensured.
3) The generator adopts a high-efficiency permanent magnet and an optimized magnetic circuit design, selects high-permeability and high-temperature-resistant materials, and the stator assembly is treated by a vacuum paint dipping process, so that the insulating property and the service life are greatly improved.
4) The wind driven generator shell is made of high-strength aluminum alloy through a precision die-casting advanced process, and has the advantages of light weight, high strength, no rustiness, plastic spraying treatment on the surface and better corrosion resistance.
5) The wind driven generator adopts an automatic wind aligning device, so that the wind driven generator is automatically adjusted and aligned to the windward direction, and meanwhile, the direction adjusting sensitivity and the direction adjusting stability are considered.
Technical parameters of the NE-300M type wind driven generator are as follows:
| model number | NE-300M |
| Rated Voltage (VDC) | 24 |
| Rated power (W) | 300 |
| Maximum power (W) | 350 |
| Wind wheel diameter (m) | 1.35m |
| Number of blades | 3 |
| Safe wind speed (m/s) | 50 |
| Start wind speed (m/s) | 2.3 |
| Cut-in wind speed (m/s) | 3.5 |
| Rated wind speed (m/s) | 10.5 |
| Brake wind speed (m/s) | 16 |
| Overall weight (kg) | 8 |
| Control system | Electromagnetic/windwheel yaw |
| Speed regulation mode | Automatic adjusting windward angle |
| Maximum temperature rise (DEG C) of motor | 62 |
| Ambient temperature (. degree. C.) | -40～80 |
The technical parameters of the NE-500M2 type wind driven generator are as follows:
| model number | NE-500M2 |
| Rated Voltage (VDC) | 24 |
| Rated power (W) | 500 |
| Maximum power (W) | 600 |
| Wind wheel diameter (m) | 1.65m |
| Number of blades | 3 |
| Safe wind speed (m/s) | 50 |
| Start wind speed (m/s) | 2.3 |
| Cut-in wind speed (m/s) | 3.0 |
| Rated wind speed (m/s) | 10.5 |
| Brake wind speed (m/s) | 18 |
| Overall weight (kg) | 11 |
| Control system | Electromagnetic/windwheel yaw |
| Speed regulation mode | Automatic adjusting windward angle |
| Maximum temperature rise (DEG C) of motor | 62 |
| Ambient temperature (. degree. C.) | -40～80 |
The H530plus type wind driven generator has the following characteristics:
1) the wind power generation system uses natural green energy and does not need external power such as commercial power and the like, so that a power supply cable does not need to be buried or erected.
2) The starting wind speed is low, and the wind energy utilization rate is high; the appearance is beautiful, and the operation vibration is low;
3) the installation and use are humanized in design, and the installation and the maintenance are convenient;
4) the wind wheel blades are made of aluminum alloy materials, and are matched with optimized pneumatic appearance design and structural design, so that the wind energy utilization coefficient is high, and the annual energy production is increased.
5) The generator adopts the permanent magnet rotor alternating-current generator of the patent technology, is matched with a special stator design, effectively reduces the resistance torque of the generator, and simultaneously enables the wind wheel and the generator to have better matching characteristics and the running reliability of the unit.
6) The rated rotating speed is low, so that the wind noise is low and the failure rate is low.
The technical parameters of the H530plus type wind driven generator are as follows:
| model number | NE-500H 530plus |
| Rated power | 500W |
| Starting wind speed | 2.5m/s |
| Rated wind speed | 13m/s |
| Safe wind speed | 45m/s |
| Output voltage | 24V |
| Net weight of main unit | 71kg |
| Diameter of wind wheel | 1.16m |
| Height of wind wheel | 1.8m |
| Number of blades | 5 |
| Vane material | Aluminium alloy |
| Generator | Three-phase ac rare-earth permanent-magnet generator |
| Control system | Electromagnetic brake |
| Speed regulation mode | Electromagnetic field |
| Operating temperature | -40℃--80℃ |
| Tower type | Independent tower |
The model of the solar cell panel is NES-M130 type solar cell panel, and the specification is as follows:
| model number | NES-M130 |
| Peak Power wp (W) | 130W |
| Open circuit voltage (V) | 23.4V |
| Optimum operating voltage (V) | 18.9V |
| Short-circuit current (A) | 7.43A |
| Optimum working current (A) | 6.88A |
| Open circuit voltage temperature coefficient | -0.38％ |
| Temperature coefficient of short circuit current | +0.1％ |
| Maximum power temperature coefficient | -0.47％ |
| Wind resistance | 60m/s |
| Maximum system voltage | 1000V |
| Size of the assembly mm | 1000*665*30 |
| Weight kg of the assembly | 7.5 |
While embodiments of the invention have been shown and described, it will be understood by those skilled in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (6)
1. A wind-solar complementary power generation and storage power supply device system is characterized by comprising a power generation module, a power storage module, a monitoring module and a control module;
the power generation module is used for generating current in a wind power generation and solar power generation mode and transmitting the current to the power storage module;
the electric storage module is used for storing the current generated by the power generation module;
the monitoring module is used for monitoring the running condition and running environment of the power generation module to obtain monitoring data and transmitting the monitoring data to the control module;
and the control module is used for adjusting the running state of the power generation module according to the monitoring data.
2. The wind-solar hybrid power generation and storage power supply device system according to claim 1, wherein the power generation module comprises a wind power generation unit, a solar power generation unit and a wind-solar hybrid control unit;
the wind-solar hybrid control unit comprises an input end and an output end;
the wind power generation unit and the solar power generation unit are respectively connected with the input end of the wind-solar hybrid control unit;
and the output end of the wind-solar hybrid control unit is connected with the power storage module.
3. The wind-solar hybrid power generation and storage power supply device system according to claim 2, wherein the wind power generation unit comprises a tower, a wind power generator and a brake device;
the wind driven generator is arranged at the top end of the tower;
and the brake device is used for stopping the rotation of the rotating shaft of the wind driven generator.
4. The wind-solar hybrid power generation and storage power supply device system according to claim 3, wherein the monitoring module comprises a vibration monitoring submodule and a wind speed monitoring submodule; the monitoring data comprises vibration data and wind speed data;
the vibration monitoring submodule is used for acquiring vibration data of the tower;
and the wind speed monitoring submodule is used for acquiring wind speed data of the environment where the wind power generation unit is located.
5. The wind-solar hybrid power generation and storage power supply system according to claim 4, wherein the wind-solar hybrid control unit comprises a wind-solar hybrid controller.
6. The wind-solar hybrid power generation and storage power supply system according to claim 5, wherein the adjusting the operation state of the power generation module according to the monitoring data comprises:
judging whether the vibration data exceed a preset normal numerical range, if so, reducing the rotating speed of the generator; if not, the rotating speed of the engine is not adjusted;
and judging whether the wind speed data exceeds a preset normal numerical range, if so, controlling the brake device to brake the transmission shaft by the control module, and stopping the rotation of the transmission shaft.
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| CN113206525A (en) * | 2021-05-06 | 2021-08-03 | 秦佳电气有限公司 | Electric power energy storage control assembly |
| CN113511153A (en) * | 2021-05-31 | 2021-10-19 | 江苏银燕房车科技有限公司 | Numerical control generator system suitable for car as a house |
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| CN103343728A (en) * | 2013-06-09 | 2013-10-09 | 上海乾祺电子科技有限公司 | Wind generating set remote on-line multi-mode health state monitoring and fault diagnosis system |
| CN107131099A (en) * | 2017-05-27 | 2017-09-05 | 中国大唐集团科学技术研究院有限公司 | A kind of wind energy conversion system self-adaptation control method, device and wind energy conversion system |
| CN107508378A (en) * | 2017-09-06 | 2017-12-22 | 合肥凌山新能源科技有限公司 | A kind of wind light mutual complementing power generation monitoring control system |
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| CN103343728A (en) * | 2013-06-09 | 2013-10-09 | 上海乾祺电子科技有限公司 | Wind generating set remote on-line multi-mode health state monitoring and fault diagnosis system |
| CN107131099A (en) * | 2017-05-27 | 2017-09-05 | 中国大唐集团科学技术研究院有限公司 | A kind of wind energy conversion system self-adaptation control method, device and wind energy conversion system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113206525A (en) * | 2021-05-06 | 2021-08-03 | 秦佳电气有限公司 | Electric power energy storage control assembly |
| CN113511153A (en) * | 2021-05-31 | 2021-10-19 | 江苏银燕房车科技有限公司 | Numerical control generator system suitable for car as a house |
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