CN108566123B - Multi-mode operation method and system of motor set - Google Patents
Multi-mode operation method and system of motor set Download PDFInfo
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- CN108566123B CN108566123B CN201810502105.5A CN201810502105A CN108566123B CN 108566123 B CN108566123 B CN 108566123B CN 201810502105 A CN201810502105 A CN 201810502105A CN 108566123 B CN108566123 B CN 108566123B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
- H02P5/46—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another
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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
- H02S20/00—Supporting structures for PV modules
- H02S20/30—Supporting structures being movable or adjustable, e.g. for angle adjustment
- H02S20/32—Supporting structures being movable or adjustable, e.g. for angle adjustment specially adapted for solar tracking
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The invention discloses a multi-mode operation method and a multi-mode operation system for a motor set, wherein the method comprises the steps of setting a plurality of motors in the motor set, and acquiring the current working mode of the motor set; judging whether the current operating conditions of the motor set are met or not according to the current operating mode of the motor set; and if the current running conditions of the motor set are not met, switching the working mode of the motor set to meet the current running conditions of the motor set. In the invention, weather state parameters are collected, the self-taking state of the tracking system is monitored, and a multi-mode peak shifting operation mode is adopted, so that the power of a power supply system is reduced; on the other hand, the power supply system is kept running continuously, so that the power device works orderly, and the working efficiency of the motor set is further improved.
Description
Technical Field
The invention relates to the field of information tracking, in particular to a multi-mode operation method and a multi-mode operation system of a motor set.
Background
In the prior art, in order to improve the conversion rate of solar energy, a photovoltaic tracking system is provided for tracking the incident angle of sunlight and improving the conversion rate of solar energy. The existing solar photovoltaic tracking system is distinguished according to a transmission mode, has tracking modes such as independent tracking and linkage tracking, is distinguished according to a control mode, and has modes such as independent power supply and external power supply. Because the current photovoltaic project construction area gradually changes from the original flat terrain area to the variable terrain area, the technology of the solar photovoltaic tracking system also gradually changes into the mode transition of independent tracking, independent power supply and the like with stronger terrain adaptability. However, the existing independent tracking technology adopts a mode of driving a single set of system motor independently, if so, the technical scheme of driving the motor independently adopts a mode of driving a single motor by an independent control box or simultaneously driving a plurality of motors by the same control box, and the two driving modes all have the problem of higher cost. And a plurality of motors are driven simultaneously by the same control box, the requirement on the power of a starting power supply is higher, so that the instantaneous starting current of the motors is very high, and certain potential safety hazards exist.
The existing photovoltaic tracking system control box often drives a plurality of direct current motors at the same time, the power of each direct current motor is fixed, and a direct current power supply with larger power needs to be equipped to ensure the normal operation of the system.
Therefore, in the power supply system, if the motors are driven simultaneously, the required starting power supply power is too large, and electric energy waste is caused; and the instantaneous current of motor start-up is too high, has the potential safety hazard.
Based on the technical problems, the application provides a technical scheme for solving the technical problems.
Disclosure of Invention
The invention aims to provide a multi-mode operation method and a multi-mode operation system for a motor set, which are used for collecting weather state parameters, monitoring the self-power-taking state of a tracking system and reducing the power of a power supply system by adopting a multi-mode off-peak operation mode; on the other hand, the power supply system is kept running continuously, so that the power device works orderly, and the working efficiency of the motor set is further improved.
The technical scheme provided by the invention is as follows:
a multi-mode operation method of a motor set comprises the steps that a plurality of motors are arranged in the motor set, and the current working mode of the motor set is obtained; judging whether the current operating conditions of the motor set are met or not according to the current operating mode of the motor set; and if the current running conditions of the motor set are not met, switching the working mode of the motor set to meet the current running conditions of the motor set.
Further preferably, the method further comprises the following steps: acquiring current weather state parameters and current power supply parameters of a motor set; the current operation condition of the motor set comprises current weather state parameters and current power supply parameters of the motor set.
In the invention, weather state parameters are collected, the self-taking state of the tracking system is monitored, and a multi-mode peak shifting operation mode is adopted, so that the power of a power supply system is reduced; on the other hand, the power supply system is kept running continuously, so that the power device works orderly, and the working efficiency of the motor set is further improved.
Further preferably, the operation mode of the motor set comprises: when the power supply parameter of the motor set is a first power supply parameter and the current weather state parameter is a first weather parameter, switching the motor set to be in a first working mode; when the power supply parameter of the motor set is a first power supply parameter and the current weather state parameter is a second weather parameter, switching the motor set to be in a second working mode; and when the power supply parameter of the motor set is a second power supply parameter or the current weather state parameter does not meet the first weather parameter and the second weather parameter, switching the motor set to be in a third working mode.
Further preferably, the operation of the electric machine set in the first operation mode includes: acquiring whether the azimuth angle of a load driven by a current motor in a working state in a motor set reaches a preset angle or not, and if the azimuth angle does not reach the preset angle and the running time of the current motor does not reach the set running time, controlling the current motor to run within the set running time; and if the preset angle is reached, sequentially sending a starting command to control the next motor to enter a working state according to the working sequence of the motors set in the motor group.
Further preferably, the operation of the motor set in the second operation mode includes: acquiring whether the azimuth angle of a load driven by a current motor in a working state in a motor set reaches a first preset angle or not; if the current load does not reach the first preset angle, controlling the current load driven by the motor to operate to the first preset angle; and if the first preset angle is reached, sequentially sending a starting command to control the next motor to enter a working state according to the working sequence of the motors set in the motor group, and driving the azimuth angle of the load to reach the first preset angle.
Further preferably, the operation of the electric machine set in the third operating mode includes: acquiring a current sun position angle; if the current sun position angle is larger than the preset target angle, acquiring whether the azimuth angle of the load driven by the current motor in the working state in the motor set reaches a second preset angle, and if the azimuth angle does not reach the second preset angle, controlling the load driven by the current motor to operate to the second preset angle; if the second preset angle is reached, sequentially sending a starting command to control the next motor to enter a working state according to the working sequence of the motors set in the motor group, and driving the azimuth angle of the load to reach the second preset angle; and if the current sun position angle is not larger than the set target angle, sending stop command information to each motor of the motor group to enable each motor to be in a stop running state.
In the invention, the motor in the motor set drives the photovoltaic tracking control system to operate to a target angle or operate in a time-sharing mode in the automatic operation mode, the photovoltaic tracking control system utilizes the wide-input direct-current switching power supply to automatically take power from the array end of the photovoltaic module, and the storage battery is used as a standby storage battery, so that the problem of taking power from a power grid by the control system is solved, the cable cost is greatly saved, and the construction cost and time are reduced.
According to the invention, multiple operation modes of the photovoltaic module of the tracking system driven by the motor set are provided, so that the normal operation of the tracking system is ensured, the high power of the whole power supply system is reduced, and the power of the direct-current switch power supply is reduced. Meanwhile, a certain off-peak operation strategy is adopted, so that the waiting time is reduced on the premise of not operating simultaneously, and the operation channel of each motor is ensured to operate in place in time.
Further preferred, comprising: starting any motor in the motor set within the set starting time, and if the starting fails within the set starting time, sequentially sending a starting command to start the next motor to enter a working state according to the working sequence of the motors set in the motor set; and recording and identifying the motor which fails to be started, and updating the working sequence of the motors in the motor set.
The multi-mode operation system of the motor set can execute the multi-mode operation method of the motor set; the method comprises the following steps: the photovoltaic module comprises a motor set, a control module, a power supply module and a photovoltaic module; a plurality of motors are arranged in the motor set; the motor group is used for driving the photovoltaic module to operate; the power supply module is used for supplying power to the motor set so as to enable the motor set to operate normally; the control module is used for acquiring the current working mode of the motor set and the current operating parameters of the motor set; the working mode switching module is used for switching the working mode of the motor set to meet the current operating condition of the motor set; the working mode switching module is arranged in the control module; the current operation condition of the motor set comprises current weather state parameters and current power supply parameters of the motor set.
In the invention, weather state parameters are collected, the self-taking state of the tracking system is monitored, and a multi-mode peak shifting operation mode is adopted, so that the power of a power supply system is reduced; on the other hand, the power supply system is kept running continuously, so that the power device runs orderly, and the working efficiency of the motor set is further improved.
Further preferably, the operation mode of the motor set comprises: the control module acquires power supply parameters of a motor set as first power supply parameters, and switches the motor set to a first working mode when the current weather state parameters are first weather parameters; when the control module collects that the power supply parameters of the motor set are first power supply parameters and the current weather state parameters are second weather parameters, switching the motor set to be in a second working mode; and the control module acquires the power supply parameter of the motor set as a second power supply parameter, or switches the motor set to a third working mode when the current weather state parameter does not meet the first weather parameter and the second weather parameter.
The multi-mode operation method and the multi-mode operation system of the motor set provided by the invention can bring at least one of the following beneficial effects:
in the invention, when the system enters a strong wind mode, a photovoltaic module in the system needs to be operated to a protection position in one step in order to avoid irreversible damage of a photovoltaic tracking bracket and a solar module caused by the photovoltaic system being in a strong wind load state for a long time; the problem that hardware equipment of the photovoltaic system is prevented from being damaged is solved; the photovoltaic tracking system selects to enter different operation modes due to different operation conditions, when the energy of the solar component is insufficient to support the operation of the system and approaches sunset, the system needs to be operated to a protection position by using the electric quantity of a lithium storage battery, at the moment, in order to reduce the energy consumption of the lithium storage battery, each channel is operated to the protection position once, and each motor is obtained to sequentially operate to the protection position; thus ensuring the normal operation of the photovoltaic system. In the invention, the switching operation mode of a plurality of motor channels effectively reduces the power supply allocation, avoids invalid waiting and realizes the utilization of the maximum time.
In the invention, any motor in the motor set is started within the set starting time, and if the starting fails within the set starting time, the next motor is started to enter a working state by sequentially sending starting commands according to the working sequence of the motors set in the motor set; and recording and identifying the motor which fails to be started, and updating the working sequence of the motors in the motor set. Therefore, the normal operation of the tracking system is ensured, and the tracking system can timely and accurately know the working condition of each motor and carry out emergency treatment. The convenience is brought to the work maintenance.
Drawings
The above features, technical features, advantages and implementations of a method and system for multi-mode operation of an electrical machine will be further described in the following detailed description of preferred embodiments in a clearly understandable manner, in conjunction with the accompanying drawings.
FIG. 1 is a flow chart of one embodiment of a method of multi-mode operation of a dynamoelectric machine set of the present invention;
FIG. 2 is a flow chart of another embodiment of a method of multi-mode operation of a dynamoelectric machine set of the present invention;
FIG. 3 is a flow chart of another embodiment of a method of multi-mode operation of a dynamoelectric machine set of the present invention;
FIG. 4 is a flow chart of another embodiment of a method of multi-mode operation of a dynamoelectric machine set of the present invention;
FIG. 5 is a flow chart of another embodiment of a method of multi-mode operation of a motor assembly of the present invention;
FIG. 6 is a block diagram of one embodiment of a multi-mode operating system for a motor assembly of the present invention;
FIG. 7 is a block diagram of another embodiment of a multi-mode operating system for a dynamoelectric machine of the present invention;
fig. 8 is a circuit diagram of another embodiment of a multiple mode operating system for an electrical machine set in accordance with the present invention.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
The invention provides one embodiment of a multi-mode operation method of a motor set, as shown in fig. 1, the method comprises the steps of setting a plurality of motors in the motor set, and S100, acquiring current weather state parameters and current power supply parameters of the motor set; step S200, acquiring the current working mode of the motor set; step S300, judging whether the current operation condition of the motor set is met according to the current working mode of the motor set; if the operation modes do not meet the requirement of the step S400, switching the working modes of the motor set to meet the current operation conditions of the motor set; the current operation condition of the motor set comprises current weather state parameters and current power supply parameters of the motor set. And continuing to operate in the operating mode if it is true.
Specifically, in the embodiment of the present application, the multi-mode operation method of the motor set is applied to the photovoltaic power generation station, the operation of the photovoltaic tracking system is driven and tracked by the power provided by the motor, and in the operation process, the tracking system is used for tracking the angle of the sun, so that the photovoltaic module 400 efficiently obtains the solar energy. A plurality of motors are arranged in a tracking system, and in order to improve the effective utilization rate of the motors, all motor groups are operated in a mode division mode in the application; because weather changes are unusual and the power supply amount is different, a plurality of working modes are set for the motor set in the application; the parameters mainly considered by the operating conditions in the application comprise weather parameters and power supply parameters of all motors in the power supply unit; the weather parameters comprise whether the tracking system has the influence of wind speed in the running process, whether the tracking system rains or snows on a cloudy day or not; and whether the power supply parameters affect the normal operation of the tracking system; and adjusting the operation mode of the motor set according to the acquired real-time parameters, and further adjusting the operation parameters of each motor.
In the invention, weather state parameters are collected, the self-taking state of the tracking system is monitored, and a multi-mode peak shifting operation mode is adopted, so that the power of a power supply system is reduced; on the other hand, the power supply system is kept running continuously, so that the power device runs orderly, and the working efficiency of the motor set is further improved.
The invention also provides an embodiment; as shown in fig. 2; the working mode of the motor set comprises the following steps: when the power supply parameter of the motor set is a first power supply parameter and the current weather state parameter is a first weather parameter, switching the motor set to be in a first working mode; when the power supply parameter of the motor set is a first power supply parameter and the current weather state parameter is a second weather parameter, switching the motor set to be in a second working mode; and when the power supply parameter of the motor set is the second power supply parameter or the current weather state parameter does not meet the first weather parameter and the second weather parameter, switching the motor set to be in a third working mode.
Specifically, in this embodiment, according to the current weather state parameter and the power supply parameter, which working mode the motor assembly conforms to is determined; testing the current wind speed through a wind speed tester, and measuring the weather condition through a weather sensor and a photosensitive sensor; if the weather is clear and the wind speed is not higher than the wind speed set by the tracking system, the tracking system can automatically take power to meet the normal power supply of the motor set, and the motor set operates in an automatic tracking mode based on the condition; namely a first working mode; if the weather is clear and the wind speed is higher than the set speed of the tracking system, the tracking system can obtain power automatically to meet the normal power supply of the motor set, and under the condition, the motor set operates in a strong wind mode, namely a second working mode; further comprising: if the tracking system cannot meet the normal power supply of the motor set by self power supply, no matter the weather condition, the tracking system needs to be switched to a power supply energy shortage protection mode, namely a third working mode; and adjusting the working mode of the motor in time according to the weather state and the self-power-taking condition of the tracking system.
An embodiment is also provided herein, and with reference to fig. 3-5, including the motor assembly operating in a first mode of operation includes: acquiring whether the azimuth angle of a load driven by a current motor in a working state in a motor set reaches a preset angle or not, and if the azimuth angle does not reach the preset angle and the running time of the current motor does not reach the set running time, controlling the current motor to run within the set running time; and if the preset angle is reached, sequentially sending a starting command to control the next motor to enter a working state according to the working sequence of the motors set in the motor group.
The motor group runs in the second working mode and comprises the following steps: acquiring whether the azimuth angle of a load driven by a current motor in a working state in a motor set reaches a first preset angle or not, and controlling the load driven by the current motor to operate to the first preset angle if the azimuth angle of the load does not reach the first preset angle; and if the first preset angle is reached, sequentially sending a starting command to control the next motor to enter a working state according to the working sequence of the motors set in the motor group, and driving the azimuth angle of the load to reach the first preset angle.
The motor group running in the third working mode comprises the following steps: acquiring a current sun position angle; if the current sun position angle is larger than the preset target angle, acquiring whether the azimuth angle of the load driven by the current motor in the working state in the motor set reaches a second preset angle, and if the azimuth angle does not reach the second preset angle, controlling the load driven by the current motor to operate to the second preset angle; if the second preset angle is reached, sequentially sending a starting command to control the next motor to enter a working state according to the working sequence of the motors set in the motor group, and driving the azimuth angle of the load to reach the second preset angle;
and if the current sun position angle is not larger than the set target angle, sending stop command information to each motor of the motor group to enable each motor to be in a stop running state.
Specifically, in this embodiment, different working modes in 3 are provided according to the obtained weather state parameters and the difference of the self-powered parameters of the tracking system;
1. an automatic tracking mode, a first operating mode; as shown with reference to FIG. 3;
in the automatic tracking mode, the working process of the motor set is that 3 motors are assumed to be arranged in the motor set; numbering No. 1, No. 2 and No. 3 respectively; in the automatic tracking mode, the photovoltaic tracking control system utilizes a wide-input direct-current switching power supply to automatically obtain electricity from the array end of the photovoltaic module; firstly, judging which motor of 3 motors in a motor group is in a running state, and if the No. 1 motor is in a working state, other two motors are in a stopping state, and only one motor is allowed to run in any period of time; judging whether the motor 1 drives the photovoltaic module to reach a set angle range, if so, stopping the operation of the motor 1, starting the motor 2 in sequence, judging whether the photovoltaic module driven by the motor 2 reaches the same set angle range as the motor 1 before starting the motor 2, and if not, starting the operation and operating according to set time; if the angle of the motor group reaches the set angle range, starting the No. 3 motors in sequence, and if the No. 3 motors also reach the set angle range, enabling 3 motors in the motor group to reach the corresponding set positions; testing again to obtain the angular orientation of the sun, calculating the angular difference between the current position of the motor and the current actual operating angular orientation of the sun again, and starting the No. 1 motor to start to operate to the corresponding position again; before starting the motor each time, judging whether the photovoltaic module driven by the motor reaches a set angle; if the angle is not reached, the operation is carried out according to the set time; assume a run of 5 minutes or 10 minutes, etc. The next motor is started.
Meanwhile, if the motor runs within the set time, the motor is supposed to run for 5 minutes at every time, and when the motor runs to the 3 rd minute, the photovoltaic module reaches the set angle range, and at the moment, the motor also stops running, and the next motor is started.
2. A strong wind protection mode and a second working mode; as shown with reference to FIG. 4;
if the wind speed collected by the control box is greater than 8.0-10.7 (m/s), the wind speed at the moment influences the rotation of the photovoltaic module, and if the photovoltaic module runs according to the set time, the wind resistance exists due to upwind and the downwind possibly exceeds the set angle range; therefore, in the working mode of the embodiment, each motor is adjusted to a set angle, namely, is operated to a protection position; the motor is not operated according to the set time, and is adjusted to be operated to a protection position according to the serial number in sequence according to the different serial numbers of the motors; such as 30 °, or 25 °, etc.; adjusting the protection position of the photovoltaic module according to the running wind speed and the rotation position of the sun;
3. a solar module power generation energy shortage protection mode, namely a third working mode; as shown with reference to FIG. 5;
in the working mode, firstly, the azimuth angle of the sun at the moment is judged, and according to the azimuth angle of the sun, whether the current is in the morning or in the afternoon, namely the specific time can be judged, if the current is judged to be close to the sunset of the sun according to the actual problem of the sun, all motors in the motor set are powered by the storage battery at the moment, and the motors are sequentially operated to the specified positions; the method comprises the steps of adjusting the electric load of the motor to a certain angle, wherein the angle can comprise a horizontal position; if the solar photovoltaic system is in the morning, the solar photovoltaic system is in a non-clear weather, and is in a heavy fog, rainy and snowy day, so that the solar photovoltaic system cannot realize self-power-taking, and the power supply is realized by the storage battery at the moment; setting each motor in the motor set to be in a stop running state, waiting for weather change, and continuing to track the running of the sun; if the person is close to the sun and falls on the mountain, the motors of the motor set are adjusted to operate at a specific protection position.
Still another embodiment mode is included: the system directly adopts the solar energy component to supply power, the lithium storage battery is standby, when the energy of the solar energy component is not enough to support the system to operate and approach to sunset, the electric quantity of the lithium storage battery is needed to operate the system to a protection position, and each motor in the motor set operates to the protection position once.
In the invention, the motor in the motor set drives the photovoltaic tracking control system to operate to a target angle or operate in a time-sharing mode in the automatic operation mode, the photovoltaic tracking control system utilizes the wide-input direct-current switching power supply to automatically take power from the array end of the photovoltaic module, and the storage battery is used as a standby storage battery, so that the problem of taking power from a power grid by the control system is solved, the cable cost is greatly saved, and the construction cost and time are reduced.
According to the invention, multiple operation modes of the photovoltaic module of the tracking system driven by the motor set are provided, so that the normal operation of the tracking system is ensured, the high power of the whole power supply system is reduced, and the power of the direct-current switch power supply is reduced. Meanwhile, a certain off-peak operation strategy is adopted, so that the waiting time is reduced on the premise of not operating simultaneously, and the operation channel of each motor is ensured to operate in place in time.
In the invention, when the photovoltaic system enters a strong wind mode, in order to avoid irreversible damage to the photovoltaic tracking bracket and the solar module caused by the photovoltaic system being in a strong wind load state for a long time, a strategy of operating the photovoltaic module to a protection position in one step is adopted; the problem that hardware equipment of the photovoltaic system is prevented from being damaged is solved; the photovoltaic tracking system selects to enter different operation modes due to different operation conditions, when the energy of the solar component is insufficient to support the operation of the system and approaches sunset, the system needs to be operated to a protection position by using the electric quantity of a lithium storage battery, at the moment, in order to reduce the energy consumption of the lithium storage battery, each channel is operated to the protection position once, and each motor is obtained to sequentially operate to the protection position; thus ensuring the normal operation of the photovoltaic system. In the invention, the switching operation mode of a plurality of motor channels effectively reduces the power supply allocation, avoids invalid waiting and realizes the utilization of the maximum time.
In the invention, any motor in the motor set is started within the set starting time, and if the starting fails within the set starting time, the next motor is started to enter a working state by sequentially sending starting commands according to the working sequence of the motors set in the motor set; and recording and identifying the motor which fails to be started, and updating the working sequence of the motors in the motor set. Therefore, the normal operation of the tracking system is ensured, and the tracking system can timely and accurately know the working condition of each motor and carry out emergency treatment. The convenience is brought to the work maintenance.
The present invention also provides a multi-mode operation system of the motor unit 100, which is shown with reference to fig. 6 and 7; various embodiments of the multi-mode operation method of the above motor unit 100 may be implemented; in the multi-mode operation system of the electric machine set 100, the following are included: the photovoltaic power generation system comprises a motor set 100, a control module 200, a power supply module 300 and a photovoltaic module 400; a plurality of motors are arranged in the motor group 100; the motor group 100 is used for driving the photovoltaic module 400 to operate; the power supply module 300 is used for supplying power to the motor group 100 so as to enable the motor group to operate normally; the control module 200 is configured to acquire a current working mode of the motor group 100 and a current operating parameter of the motor group 100; the working mode switching module is used for switching the working mode of the motor set 100 to meet the current operating condition of the motor set 100; the working mode switching module is arranged in the control module; the current operating conditions of the electric machine set 100 include current weather state parameters and current power supply parameters of the electric machine set 100.
Specifically, in the present embodiment, the motor set 100 provides power to the photovoltaic module 400, so that the photovoltaic module 400 operates along with the sun; meanwhile, the specific position where each motor in the motor group 100 drives the load to operate, the light sensation intensity of the sun, the wind speed and the related power supply parameters of the power supply module 300, which are acquired by the control module 200, can be acquired by the control module 200; switching and adjusting the working mode of the motor set 100 according to the collected specific relevant parameters; further controlling the operation mode of each motor, including angle operation or time strategy operation; the power supply module 300 comprises a power management module in the power supply module 300, which detects the electric quantity when the direct current switch power supply normally takes electricity from the photovoltaic module 400 array, and the monitored electric quantity state is sent to the control module 200; when the power supply of the tracking control system is supplied by a direct-current switching power supply, the storage battery is in a floating charge state. When the direct-current switching power supply has no power output (namely, the photovoltaic module 400 array has no power input), the storage battery is in a power supply state, and the storage battery supplies power to the control system at the moment. When the battery capacity decreases to a certain value (which may be set to 50%), the power management module will signal the tracking control system and the photovoltaic tracking system will enter the protection mode. And only when the power supply of the direct-current power supply is normal and the electric quantity of the storage battery reaches a safety set value, the photovoltaic tracking system starts the automatic tracking mode.
The power management module has the following functions: as shown with reference to fig. 7-8;
1) charging current limiting function
The on-off frequency of the MOS tube in the software control charging circuit is used for controlling the magnitude of the charging current, and the function prevents the overload protection of the switching power supply due to a large load. The MCU provides a high-frequency PWM waveform for the FB end of the chip, so that XL4015 enters a high-frequency turn-off state, and the output current of the XL4015 is controlled. The magnitude of the output current may be varied according to the duty cycle variation of the PWM.
2) Communication between battery and control module 200
The storage battery module is communicated with the control module 200 through an MODBUS protocol, and the main control chip can monitor and control the charging and discharging of the storage battery in real time.
3) Charge and discharge management of storage battery
1. When the system supplies power normally, the MCU detects that the voltage of the switching power supply is normal, and the voltage of the switching power supply is greater than or equal to the voltage at the two ends of the storage battery at the moment.
a. When the motor does not operate, the main control MCU informs the storage battery to open the charging MOS tube, and the storage battery is charged at the moment.
b. When the motor needs to operate, the main control MCU informs the storage battery to close the charging MOS tube, and at the moment, the storage battery is charged and shut down.
2. When the system is not normally powered or the power supply voltage is insufficient, the MCU detects that the voltage of the switch power supply is in a click protection state (namely the switch power supply tries to start first, but the energy available for the system cannot meet the output requirement, the switch power supply is turned off and outputs. And every 10Min an attempt is made to detect the voltage across the switching power supply. The discharging port of the storage battery is always in a default opening state, when the switch power supply does not output, because the switch power supply and the discharging end of the storage battery are connected in parallel at the power supply port of the system (anti-reverse design is made between the switch power supply and the discharging end of the storage battery), the voltage of the storage battery automatically replaces the switch power supply to supply power to the system (when the switch power supply works normally, the voltage of the output end of the switch power supply is higher than the voltage of the discharging port of the storage. At this time, the storage battery is only used for the standby power supply of the system, and the tracking operation is not performed.
In the invention, weather state parameters are collected, the self-taking state of the tracking system is monitored, and a multi-mode peak shifting operation mode is adopted, so that the power of a power supply system is reduced; on the other hand, the power supply system is kept running continuously, so that the power device runs orderly, and the working efficiency of the motor set 100 is further improved.
In the invention, the battery management module is arranged in the power supply mode, so that the power supply state of the tracking system can be known in time, and meanwhile, a plurality of power supply modes are provided through the standby battery.
The present invention also provides an embodiment, with reference to fig. 1-5; the operation modes of the electric machine set 100 include: the control box acquires power supply parameters of the motor set 100 as first power supply parameters, and switches the motor set 100 to a first working mode when the current weather state parameters are first weather parameters; when the control box collects that the power supply parameters of the motor set 100 are first power supply parameters and the current weather state parameters are second weather parameters, switching the motor set 100 to be in a second working mode; and when the control box acquires that the power supply parameter of the motor set 100 is the second power supply parameter or the current weather state parameter does not satisfy the first weather parameter and the second weather parameter, switching the motor set 100 to be in a third working mode.
Specifically, in this embodiment, according to the current weather state parameter and the power supply parameter, which working mode the motor assembly 100 conforms to is determined; testing the current wind speed through a wind speed tester, and measuring the weather condition through a weather sensor and a photosensitive sensor; if the weather is clear and the wind speed is not higher than the wind speed set by the tracking system, the tracking system can obtain power automatically to meet the normal power supply of the motor set 100, and based on the condition, the motor set 100 operates in an automatic tracking mode; namely a first working mode; if the weather is clear and the wind speed is higher than the set speed of the tracking system, the tracking system can obtain power automatically to meet the normal power supply of the motor set 100, and under the condition, the motor set 100 operates in a strong wind mode, namely a second working mode; further comprising: if the tracking system cannot meet the normal power supply of the motor set 100 due to self power supply, no matter the weather condition, the tracking system needs to be switched to a power supply energy shortage protection mode, namely a third working mode; and adjusting the working mode of the motor in time according to the weather state and the self-power-taking condition of the tracking system.
In each operating mode, the operation of each motor has already been explained in detail in the above embodiment of the method, and is not described here again.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. A multi-mode operation method of a motor set is applied to a photovoltaic power station, comprises the steps of arranging a plurality of motors in the motor set, and is characterized in that:
acquiring current weather state parameters and current power supply parameters of a motor set;
acquiring a current working mode of a motor set;
judging whether the current operating conditions of the motor set are met or not according to the current operating mode of the motor set; the current operating conditions of the motor set comprise current weather state parameters and current power supply parameters of the motor set;
if the current running conditions of the motor set are not met, switching the working mode of the motor set to meet the current running conditions of the motor set;
if the working modes are not accordant, the switching of the working modes of the motor group comprises the following steps:
when the power supply parameter of the motor set is a first power supply parameter and the current weather state parameter is a first weather parameter, switching the motor set to be in a first working mode by adopting a peak shifting operation mode according to a motor working sequence set in the motor set, and automatically taking power to supply power to the motor set in the first working mode;
when the power supply parameter of the motor set is a first power supply parameter and the current weather state parameter is a second weather parameter, switching the motor set to be in a second working mode by adopting a peak shifting operation mode according to a motor working sequence set in the motor set, and automatically taking power to supply power to the motor set in the second working mode;
when the power supply parameter of the motor set is a second power supply parameter or the current weather state parameter does not meet the first weather parameter and the second weather parameter, switching the motor set to a third working mode in a peak shifting operation mode according to a set working sequence of the motor set, and supplying power to the motor set through a storage battery in the third working mode;
wherein, only one motor is allowed to operate to switch the working mode in any period; the first power supply parameter is that the tracking system automatically takes power to meet normal power supply of the motor set, the second power supply parameter is that the tracking system automatically takes power to not meet normal power supply of the motor set, the first weather parameter is that the wind speed is not higher than the set wind speed while the weather is clear, and the second weather parameter is that the wind speed is higher than the set wind speed while the weather is clear;
if the starting fails within the set starting time, according to the working sequence of the motors set in the motor set, the starting command is sequentially sent to start the next motor to enter a working state, the motor which fails to start is recorded and identified, and the working sequence of the motors in the motor set is updated.
2. The method of operating a motor unit in multiple modes of claim 1, wherein operating a motor unit in the first operating mode comprises:
acquiring whether the azimuth angle of a load driven by a current motor in a working state in a motor set reaches a preset angle or not, and if the azimuth angle does not reach the preset angle and the running time of the current motor does not reach the set running time, controlling the current motor to run within the set running time;
and if the preset angle is reached, sequentially sending a starting command to control the next motor to enter a working state according to the working sequence of the motors set in the motor group.
3. The method of operating a motor unit in multiple modes of claim 1, wherein operating a motor unit in the second operating mode comprises:
acquiring whether the azimuth angle of a load driven by a current motor in a working state in a motor set reaches a first preset angle or not;
if the current load does not reach the first preset angle, controlling the current load driven by the motor to operate to the first preset angle;
and if the first preset angle is reached, sequentially sending a starting command to control the next motor to enter a working state according to the working sequence of the motors set in the motor group, and driving the azimuth angle of the load to reach the first preset angle.
4. The method of operating a motor pack in multiple modes according to claim 1, wherein operating a motor pack in the third operating mode comprises:
acquiring a current sun position angle;
if the current sun position angle is larger than the preset target angle, whether the azimuth angle of the load driven by the current motor in the working state in the motor set reaches a second preset angle or not is acquired,
if the current load does not reach the second preset angle, controlling the current load driven by the motor to operate to the second preset angle;
if the second preset angle is reached, sequentially sending a starting command to control the next motor to enter a working state according to the working sequence of the motors set in the motor group, and driving the azimuth angle of the load to reach the second preset angle;
and if the current sun position angle is not larger than the set target angle, sending stop command information to each motor of the motor group to enable each motor to be in a stop running state.
5. A multi-mode operation system of an electric machine set, which is applied to a photovoltaic power station and can execute the multi-mode operation method of the electric machine set according to any one of claims 1 to 4; it is characterized by comprising: the photovoltaic module comprises a motor set, a control module, a power supply module and a photovoltaic module; a plurality of motors are arranged in the motor set;
the motor group is used for driving the photovoltaic module to operate;
the power supply module is used for supplying power to the motor set so as to enable the motor set to operate normally;
the control module is used for acquiring the current working mode of the motor set and the current operating parameters of the motor set;
the working mode switching module is used for switching the working mode of the motor set to meet the current operating condition of the motor set; the working mode switching module is arranged in the control module;
the current operation condition of the motor set comprises current weather state parameters and current power supply parameters of the motor set;
the working mode of the motor set comprises the following steps:
the control module acquires power supply parameters of a motor set as first power supply parameters, the current weather state parameters are first weather parameters, the motor set is switched into a first working mode in a peak shifting operation mode according to a set motor working sequence in the motor set, and the motor set is supplied with power by self-power-taking in the first working mode;
when the control module collects power supply parameters of the motor set as first power supply parameters and current weather state parameters are second weather parameters, the motor set is switched into a second working mode in a peak shifting operation mode according to a set motor working sequence in the motor set, and power is automatically taken out to supply power to the motor set in the second working mode;
the control module acquires power supply parameters of the motor set as second power supply parameters, or switches the motor set to a third working mode in a peak shifting operation mode according to a set motor working sequence in the motor set when current weather state parameters do not meet the first weather parameters and the second weather parameters, and supplies power to the motor set through a storage battery in the third working mode;
wherein, only one motor is allowed to operate to switch the working mode in any period; the first power supply parameter is that the tracking system automatically takes power to meet normal power supply of the motor set, the second power supply parameter is that the tracking system automatically takes power to not meet normal power supply of the motor set, the first weather parameter is that the wind speed is not higher than the set wind speed while the weather is clear, and the second weather parameter is that the wind speed is higher than the set wind speed while the weather is clear;
if the starting fails within the set starting time, according to the working sequence of the motors set in the motor set, the starting command is sequentially sent to start the next motor to enter a working state, the motor which fails to start is recorded and identified, and the working sequence of the motors in the motor set is updated.
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| CN104932560A (en) * | 2015-06-26 | 2015-09-23 | 南昌大学 | Solar dual-axis tracking system based on multi-source information fusion |
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| EP0924849A3 (en) * | 1997-12-22 | 2000-04-05 | Canon Kabushiki Kaisha | Motor control apparatus |
| CN201540488U (en) * | 2009-11-24 | 2010-08-04 | 中环光伏系统有限公司 | All-weather adaptive single-shaft solar tracking system |
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