CN116501099A - Intelligent regulation and control system for vertical relation between photovoltaic and solar light rays - Google Patents
Intelligent regulation and control system for vertical relation between photovoltaic and solar light rays Download PDFInfo
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Abstract
The invention relates to the technical field of photovoltaic power generation, and particularly discloses an intelligent regulation and control system for the vertical relation between photovoltaic and solar light rays. The control system has a simple structure, and the control method is quick and efficient and has low implementation difficulty.
Description
Technical Field
The invention relates to the technical field of photovoltaic power generation, and particularly discloses an intelligent regulation and control system for the vertical relationship between photovoltaic and solar light rays.
Background
In the related art, the photovoltaic power generation control technology is either too simple or too complex and impractical, the structure of the existing light collection technology is complex, the control algorithm operation is complex, for example, patent document CN103715980B discloses a symmetrical two-stage plane reflection collection method applied to a space solar power station, and the technology aims to solve the problems of uneven distribution of collected energy flow, mismatching of the shape of light spots and the shape of a solar cell and high tracking difficulty in the existing solar energy collection system scheme. Establishing a reflection system: one first-stage off-axis parabolic reflecting surfaces are respectively arranged on two sides of the solar cell panel, the two first-stage off-axis parabolic reflecting surfaces are symmetrically arranged by taking an optical axis perpendicular to the solar cell panel as an axis, and two second-stage inclined plane reflecting mirrors are respectively and symmetrically arranged on two sides of a focus of the two first-stage off-axis parabolic reflecting surfaces; the method comprises the steps of enabling two elliptical light spots presented on the surface of a solar panel to be completely overlapped, solving the optimal structural parameters of a reflecting system, and regulating and controlling the tracking error of the reflecting system; the solar cell array realizes energy flow collection by regulating and controlling the reflection system running on the orbit in two dimensions. It is used for concentrating energy flow of a space solar power station. The structure of the technical arrangement is relatively complex.
Also, for example, patent document CN107947687a discloses a solar photovoltaic power generation device based on a wind-solar complementary system, which includes: a base in which a generator is installed; the vertical shaft is arranged on the base, sequentially penetrates through the lower connecting frame and the upper connecting frame, is rotationally connected with the upper connecting frame and the lower connecting frame, and is fixedly provided with a supporting seat at the top end; a blade fixedly installed between the upper and lower connection frames and parallel to the vertical shaft; the supporting shaft is arranged at the top end of the vertical shaft through a circular through hole on the supporting seat; the solar photovoltaic panel is fixedly spliced into a parabolic shape and is fixedly connected with the support shaft through a bracket on the support shaft; a drive motor electrically coupled to the support shaft, the drive motor being configured to rotate the support shaft; the angle sensor is electrically connected with the support shaft and can be used for monitoring the rotation angle of the support shaft; a photovoltaic panel controller that simultaneously electrically connects the angle sensor and the driving motor; the wind power complementary controller is used for simultaneously electrically connecting the generator and the solar photovoltaic panel, and the technology is relatively simple in structural arrangement, but is relatively complex in control algorithm, for example, the technology adopts a fuzzy control output rotation angle to regulate and control a support shaft so as to regulate the rotation angle of the solar photovoltaic panel, and comprises the following steps: respectively converting the illumination incidence angle, the illumination incidence angle change rate and the rotation angle into quantization levels in the fuzzy theory domain;
inputting the illumination incidence angle into a fuzzy control model, dividing the illumination incidence angle into 5 grades, and inputting the illumination incidence angle change rate into the fuzzy control model, dividing the illumination incidence angle change rate into 7 grades; the fuzzy control model is output as the rotation angle and is divided into 7 grades; the range of the illumination incidence angle is [0, 45], the range of the illumination incidence angle change rate is [ -1,1], the range of the rotation angle is [ -30, 30], the quantization factors are set to be 1, the fuzzy set of the illumination incidence angle is { S, SM, M, MB, B }, the fuzzy set of the illumination incidence angle change rate is { NB, NM, NS, ZO, PS, PM, PB }, and the fuzzy set of the rotation angle is { NB, NM, NS, ZO, PS, PM, PB }; the membership functions are trigonometric functions. The adjustment key of the vertical relation between the visible light and the solar light is the adjustment key of the rotating shaft of the photovoltaic panel, but the adjustment key is difficult in the realization of the fuzzy control regulation in the prior art, and the problems of a plurality of standards and the like are required to be solved.
Disclosure of Invention
The invention aims to provide an intelligent regulation and control system for the vertical relation between photovoltaic and solar light rays, so as to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme:
the invention discloses an intelligent regulation and control system for the vertical relation between photovoltaic and solar light rays, which comprises a photovoltaic panel rotating shaft stepping motor, a stepping motor controller, a photovoltaic output power measuring circuit, a singlechip and an upper computer, wherein the singlechip is used for transmitting a measuring signal of the photovoltaic output power measuring circuit to the upper computer, the upper computer is used for calculating the equivalent output electromotive force of the current photovoltaic power generation based on the measuring signal of the photovoltaic output power measuring circuit, the upper computer is also used for calculating the equivalent current by the equivalent output electromotive force of the photovoltaic power generation and outputting a control parameter for regulating the stepping motor according to a change parameter of the equivalent current, and the singlechip is also used for converting the control parameter for regulating the stepping motor into a corresponding electric signal to be loaded to the stepping motor controller and then regulating and controlling the photovoltaic panel rotating shaft stepping motor by the stepping motor controller.
Optionally, the step motor for the rotating shaft of the photovoltaic panel specifically refers to a step motor linked with the rotating shaft of the photovoltaic panel, and the step motor is used for controlling the rotating angle of the photovoltaic panel so as to control the relation between the photovoltaic panel and solar light rays.
Optionally, the photovoltaic output power measurement circuit refers to a grid-connected output power measurement circuit.
Optionally, the upper computer calculates the current equivalent output electromotive force y of photovoltaic power generation based on the measurement signal of the photovoltaic output power measurement circuit, where y=y m * sin (wt), wherein w is constant, t is time, y m Is constant.
The equivalent current i (t), i (t) =e is calculated by the equivalent output electromotive force of the photovoltaic power generation (-B*t/p) wpy m /(B 2 +w 2 p 2 )+(B*sin(wt)-wp*cos(wt))y m /(B 2 +w 2 p 2 ) Wherein B is an output equivalent resistance value, and p is an output equivalent inductance value.
Optionally, the variable parameter of the equivalent current specifically refers to a first derivative of the equivalent current with respect to the amount of time, i (t) =e (-B*t/p) wpy m /(B 2 +w 2 p 2 )+(B*sin(wt)-wp*cos(wt))y m /(B 2 +w 2 p 2 ) The first derivative of the amount of time t.
Optionally, the upper computer outputs the control parameter for adjusting the stepper motor based on the change parameter according to the equivalent current, and the specific upper computer obtains the change parameter V1 of the equivalent current in the first time period, then modifies the weighting coefficient based on the change parameter V1 of the equivalent current, and predicts the control parameter for adjusting the stepper motor by adopting an exponential smoothing method.
Optionally, the upper computer further obtains a variable parameter V1 of the equivalent current in the first time period, and then modifies the weighting coefficient based on the variable parameter V1 of the equivalent current, and predicts the control parameter for adjusting the stepper motor by using an exponential smoothing method, specifically:
the method comprises the steps of establishing a mapping relation between a change parameter V of equivalent current and a weighting coefficient alpha for predicting the adjustment of a stepping motor in an exponential smoothing method in advance, calculating the control parameter of the adjustment of a certain stepping motor by the exponential smoothing method, determining the corresponding weighting coefficient alpha by looking up a mapping table for the change parameter V of the equivalent current in the previous time period before calculation, and then carrying out different weighted distribution on the actual value and the predicted value of the control parameter of the adjustment of the stepping motor by the exponential smoothing method by using the actual value and the predicted value of the control parameter of the adjustment of the stepping motor in the previous period to obtain an exponential smoothing value which is used as the predicted value of the control parameter of the adjustment of the stepping motor in the next period, wherein the prediction formula is as follows: xt=αs t-1 +(1-α)X t-1 ，(0<α<1) Wherein Xt is the predicted value of the control parameter for regulating the stepping motor in the t-th period, S t-1 The actual value of the control parameter which is adjusted for the stepping motor in the last period; x is X t-1 A control parameter predicted value which is adjusted for the stepping motor in the previous period; alpha is a weighting coefficient, and the exponential smoothing method has the advantages of a moving average method, can reduce the data storage capacity in the operation process, also considers different roles of data in different periods, and has high prediction accuracy.
The invention further discloses an intelligent regulation and control method for the vertical relation between photovoltaic and solar light rays, which comprises the following steps: the single chip microcomputer transmits a measurement signal of the photovoltaic output power measurement circuit to the upper computer, the upper computer calculates the current equivalent output electromotive force of photovoltaic power generation based on the measurement signal of the photovoltaic output power measurement circuit, the upper computer calculates equivalent current from the equivalent output electromotive force of the photovoltaic power generation and outputs control parameters for adjusting the stepping motor according to the change parameters of the equivalent current, the single chip microcomputer also converts the control parameters for adjusting the stepping motor into corresponding electric signals to be loaded to the stepping motor controller, and then the stepping motor controller regulates and controls the stepping motor of the rotating shaft of the photovoltaic panel; the relation between the photovoltaic and the solar light is adjusted by rotating the photovoltaic panel rotating shaft stepping motor.
Compared with the prior art, the invention has the beneficial effects that:
the singlechip transmits a measurement signal of the photovoltaic output power measurement circuit to the upper computer, the upper computer calculates the equivalent output electromotive force of the current photovoltaic power generation based on the measurement signal of the photovoltaic output power measurement circuit, the upper computer calculates the equivalent current from the equivalent output electromotive force of the photovoltaic power generation and outputs control parameters for adjusting the stepping motor according to the change parameters of the equivalent current, the singlechip also converts the control parameters for adjusting the stepping motor into corresponding electric signals to be loaded to the stepping motor controller, and then the stepping motor controller regulates and controls the stepping motor of the photovoltaic panel rotating shaft; the photovoltaic panel rotating shaft stepping motor rotates to adjust the relation between the photovoltaic and the solar light rays, and the control system is simple in structure, rapid and efficient in control method and low in implementation difficulty.
Drawings
FIG. 1 is a block diagram of an intelligent regulation system for vertical relationship between photovoltaic and solar light rays.
FIG. 2 is a flow chart of an embodiment of the intelligent regulation method for the vertical relationship between photovoltaic and solar light rays.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings and the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In specific implementation, the invention discloses an intelligent regulation and control system for the vertical relation between photovoltaic and solar light rays, as shown in fig. 1, which comprises a photovoltaic panel rotating shaft stepping motor, a stepping motor controller, a photovoltaic output power measuring circuit, a singlechip and an upper computer, wherein the stepping motor controller and the photovoltaic output power measuring circuit are electrically connected with the singlechip, the singlechip is electrically connected with the upper computer, and the stepping motor controller is also electrically connected with the photovoltaic panel rotating shaft stepping motor; the stepping motor of the rotating shaft of the photovoltaic panel is specifically used for controlling the stepping motor linked with the rotating shaft of the photovoltaic panel, the stepping motor is used for controlling the rotating angle of the photovoltaic panel so as to control the vertical relation between the photovoltaic panel and solar light rays, generally, when the solar light rays vertically irradiate the photovoltaic panel in a certain area, the power generation of the photovoltaic panel is maximum, and the stepping motor controller is used for controlling the rotating angle of the stepping motor and further used for controlling the rotating angle of the stepping motor of the rotating shaft of the photovoltaic panel; the photovoltaic output power measuring circuit is used for measuring the power of the photovoltaic power generation output circuit, and the photovoltaic power generation needs to be output through the grid connection of the inverter, so that the photovoltaic output power measuring circuit generally refers to the grid connection output power measuring circuit, the singlechip is used for transmitting a measuring signal of the photovoltaic output power measuring circuit to the upper computer, the upper computer is used for calculating the equivalent output electromotive force of the current photovoltaic power generation based on the measuring signal of the photovoltaic output power measuring circuit, the upper computer is also used for calculating the equivalent current by the equivalent output electromotive force of the photovoltaic power generation and outputting a control parameter for adjusting the stepping motor according to the change parameter of the equivalent current, and the singlechip is also used for converting the control parameter for adjusting the stepping motor into a corresponding electric signal to be loaded to the stepping motor controller and then regulating and controlling the stepping motor of the rotating shaft of the photovoltaic panel by the stepping motor controller.
In the implementation, the singlechip transmits a measurement signal of the photovoltaic output power measurement circuit to the upper computer, the upper computer calculates the equivalent output electromotive force of the current photovoltaic power generation based on the measurement signal of the photovoltaic output power measurement circuit, the upper computer calculates the equivalent current by the equivalent output electromotive force of the photovoltaic power generation and outputs a control parameter for adjusting the stepping motor according to the change parameter of the equivalent current, the singlechip also converts the control parameter for adjusting the stepping motor into a corresponding electric signal to be loaded to the stepping motor controller, and then the stepping motor controller regulates and controls the stepping motor of the rotating shaft of the photovoltaic panel; the photovoltaic panel rotating shaft stepping motor rotates to adjust the relation between the photovoltaic and the solar light rays, and the control system is simple in structure, rapid and efficient in control method and low in implementation difficulty.
The upper computer is configured on the computer system, and the upper computer comprises: one or more processors; one or more input devices, one or more output devices, and memory. The processor, the input device, the output device and the memory are connected through a bus. The memory is for storing a computer program comprising program instructions and the processor is for executing the program instructions stored by the memory. Wherein the processor is configured to invoke the program instructions to execute:
calculating the current equivalent output electromotive force of the photovoltaic power generation based on the measurement signal of the photovoltaic output power measurement circuit, calculating the equivalent current of the equivalent output electromotive force of the photovoltaic power generation, and outputting control parameters for adjusting the stepping motor according to the change parameters of the equivalent current; it should be appreciated that in embodiments of the present invention, the processor may be a central processing unit (CentralProcessing Unit, CPU), which may also be other general purpose processors, digital signal processors (DigitalSignal Processor, DSPs), application specific integrated circuits (Application Specific Integrated Circuit, ASICs), off-the-shelf programmable gate arrays (Field-Programmable Gate Array, FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The input devices may include a touch pad, a microphone, etc., and the output devices may include a display (LCD, etc.), speakers, etc.
The memory may include read only memory and random access memory and provide instructions and data to the processor. A portion of the memory may also include non-volatile random access memory. For example, the memory may also store information of the device type.
In a specific implementation, the processor, the input device and the output device described in the embodiments of the present invention may execute the implementation described in the method embodiments provided in the embodiments of the present invention.
There is also provided in an embodiment of the present invention a computer-readable storage medium storing a computer program which, when executed by a processor, implements the method of the present invention.
The computer readable storage medium may be an internal storage unit of the upper computer according to any one of the foregoing embodiments, for example, a hard disk or a memory of the upper computer. The computer readable storage medium may be an external storage device of the host computer, for example, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) or the like. Further, the computer readable storage medium may further include both an internal storage unit and an external storage device of the upper computer. The computer readable storage medium is used for storing the computer program and other programs and data required by the upper computer.
Optionally, the invention discloses an intelligent regulation and control system for the vertical relation between photovoltaic and solar light rays, as shown in fig. 1, which comprises a photovoltaic panel rotating shaft stepping motor, a stepping motor controller, a photovoltaic output power measuring circuit, a singlechip and an upper computer, wherein the stepping motor controller and the photovoltaic output power measuring circuit are electrically connected with the singlechip, the singlechip is electrically connected with the upper computer, and the stepping motor controller is also electrically connected with the photovoltaic panel rotating shaft stepping motor; the stepping motor of the rotating shaft of the photovoltaic panel is specifically used for controlling the stepping motor linked with the rotating shaft of the photovoltaic panel, the stepping motor is used for controlling the rotating angle of the photovoltaic panel so as to control the vertical relation between the photovoltaic panel and solar light rays, generally, when the solar light rays vertically irradiate the photovoltaic panel in a certain area, the power generation of the photovoltaic panel is maximum, and the stepping motor controller is used for controlling the rotating angle of the stepping motor and further used for controlling the rotating angle of the stepping motor of the rotating shaft of the photovoltaic panel; the photovoltaic output power measuring circuit is used for measuring the power of the photovoltaic power generation output circuit, and the common photovoltaic power generation needs to be output through the grid connection of the inverter, so the photovoltaic output power measuring circuit is generally referred to as the grid connection output power measuring circuit, the singlechip is used for transmitting the measuring signal of the photovoltaic output power measuring circuit to the upper computer, the upper computer calculates the equivalent output electromotive force of the current photovoltaic power generation based on the measuring signal of the photovoltaic output power measuring circuit, and the upper computer is also used for calculating the equivalent current from the equivalent output electromotive force of the photovoltaic power generation and according to the equivalent currentThe single chip microcomputer is also used for converting the control parameters for adjusting the stepping motor into corresponding electric signals to be loaded to a stepping motor controller, and then the stepping motor controller regulates and controls the stepping motor of the rotating shaft of the photovoltaic panel; the upper computer calculates the equivalent output electromotive force y of the current photovoltaic power generation based on the measurement signal of the photovoltaic output power measurement circuit, wherein y=y m * sin (wt), wherein w is constant, t is time, y m Is constant.
Optionally, the invention discloses an intelligent regulation and control system for the vertical relation between photovoltaic and solar light rays, as shown in fig. 1, which comprises a photovoltaic panel rotating shaft stepping motor, a stepping motor controller, a photovoltaic output power measuring circuit, a singlechip and an upper computer, wherein the stepping motor controller and the photovoltaic output power measuring circuit are electrically connected with the singlechip, the singlechip is electrically connected with the upper computer, and the stepping motor controller is also electrically connected with the photovoltaic panel rotating shaft stepping motor; the stepping motor of the rotating shaft of the photovoltaic panel is specifically used for controlling the stepping motor linked with the rotating shaft of the photovoltaic panel, the stepping motor is used for controlling the rotating angle of the photovoltaic panel so as to control the vertical relation between the photovoltaic panel and solar light rays, generally, when the solar light rays vertically irradiate the photovoltaic panel in a certain area, the power generation of the photovoltaic panel is maximum, and the stepping motor controller is used for controlling the rotating angle of the stepping motor and further used for controlling the rotating angle of the stepping motor of the rotating shaft of the photovoltaic panel; the photovoltaic output power measuring circuit is used for measuring the power of the photovoltaic power generation output circuit, and the common photovoltaic power generation needs to be output through the grid-connected inverter, so that the photovoltaic output power measuring circuit is commonly referred to as the grid-connected output power measuring circuit, the single chip microcomputer is used for transmitting the measuring signal of the photovoltaic output power measuring circuit to the upper computer, the upper computer is used for calculating the equivalent output electromotive force of the current photovoltaic power generation based on the measuring signal of the photovoltaic output power measuring circuit, the upper computer is also used for calculating the equivalent current by the equivalent output electromotive force of the photovoltaic power generation and outputting the control parameter for adjusting the stepping motor according to the change parameter of the equivalent current, and the single chip microcomputer is also used for adjusting the stepping motorThe control parameters adjusted by the stepping motor are converted into corresponding electric signals, the corresponding electric signals are loaded to the stepping motor controller, and then the stepping motor controller regulates and controls the stepping motor of the rotating shaft of the photovoltaic panel; the upper computer calculates the equivalent output electromotive force y of the current photovoltaic power generation based on the measurement signal of the photovoltaic output power measurement circuit, wherein y=y m * sin (wt), wherein w is constant, t is time, y m Calculating an equivalent current i (t), i (t) =e from an equivalent output electromotive force of photovoltaic power generation as a constant (-B*t/p) wpy m /(B 2 +w 2 p 2 )+(B*sin(wt)-wp*cos(wt))y m /(B 2 +w 2 p 2 ) Wherein B is an output equivalent resistance value, and p is an output equivalent inductance value.
Optionally, the invention discloses an intelligent regulation and control system for the vertical relation between photovoltaic and solar light rays, as shown in fig. 1, which comprises a photovoltaic panel rotating shaft stepping motor, a stepping motor controller, a photovoltaic output power measuring circuit, a singlechip and an upper computer, wherein the stepping motor controller and the photovoltaic output power measuring circuit are electrically connected with the singlechip, the singlechip is electrically connected with the upper computer, and the stepping motor controller is also electrically connected with the photovoltaic panel rotating shaft stepping motor; the stepping motor of the rotating shaft of the photovoltaic panel is specifically used for controlling the stepping motor linked with the rotating shaft of the photovoltaic panel, the stepping motor is used for controlling the rotating angle of the photovoltaic panel so as to control the vertical relation between the photovoltaic panel and solar light rays, generally, when the solar light rays vertically irradiate the photovoltaic panel in a certain area, the power generation of the photovoltaic panel is maximum, and the stepping motor controller is used for controlling the rotating angle of the stepping motor and further used for controlling the rotating angle of the stepping motor of the rotating shaft of the photovoltaic panel; the photovoltaic output power measuring circuit is used for measuring the power of the photovoltaic power generation output circuit, and the common photovoltaic power generation needs to be output through the grid connection of the inverter, so that the photovoltaic output power measuring circuit is commonly referred to as the grid connection output power measuring circuit, the singlechip is used for transmitting the measuring signal of the photovoltaic output power measuring circuit to the upper computer, and the upper computer calculates the equivalent output electric power of the current photovoltaic power generation based on the measuring signal of the photovoltaic output power measuring circuitThe upper computer is also used for calculating equivalent current from equivalent output electromotive force of photovoltaic power generation and outputting control parameters for adjusting the stepping motor according to variation parameters of the equivalent current, and the singlechip is also used for converting the control parameters for adjusting the stepping motor into corresponding electric signals to be loaded to a stepping motor controller and then regulating and controlling the stepping motor of the rotating shaft of the photovoltaic panel by the stepping motor controller; the upper computer calculates the equivalent output electromotive force y of the current photovoltaic power generation based on the measurement signal of the photovoltaic output power measurement circuit, wherein y=y m * sin (wt), wherein w is constant, t is time, y m Calculating an equivalent current i (t), i (t) =e from an equivalent output electromotive force of photovoltaic power generation as a constant (-B*t/p) wpy m /(B 2 +w 2 p 2 )+(B*sin(wt)-wp*cos(wt))y m /(B 2 +w 2 p 2 ) Wherein B is an output equivalent resistance value, p is an output equivalent inductance value, and the variation parameter of the equivalent current specifically refers to a first derivative of the equivalent current with time, i.e. i (t) =e (-B*t/p) wpy m /(B 2 +w 2 p 2 )+(B*sin(wt)-wp*cos(wt))y m /(B 2 +w 2 p 2 ) The first derivative of the amount of time t.
Optionally, the invention discloses an intelligent regulation and control system for the vertical relation between photovoltaic and solar light rays, as shown in fig. 1, which comprises a photovoltaic panel rotating shaft stepping motor, a stepping motor controller, a photovoltaic output power measuring circuit, a singlechip and an upper computer, wherein the stepping motor controller and the photovoltaic output power measuring circuit are electrically connected with the singlechip, the singlechip is electrically connected with the upper computer, and the stepping motor controller is also electrically connected with the photovoltaic panel rotating shaft stepping motor; the stepping motor of the rotating shaft of the photovoltaic panel specifically refers to a stepping motor linked with the rotating shaft of the photovoltaic panel, the stepping motor is used for controlling the rotating angle of the photovoltaic panel so as to control the vertical relation between the photovoltaic panel and solar light rays, generally, when the solar light rays vertically irradiate the photovoltaic panel in a certain area, the power generation of the photovoltaic panel is maximum, the stepping motor controller is used for controlling the rotating angle of the stepping motor and further used for controlling the photovoltaic panelThe rotation angle of the stepping motor with the plate rotating shaft; the photovoltaic output power measuring circuit is used for measuring the power of the photovoltaic power generation output circuit, and the common photovoltaic power generation needs to be output through the grid connection of the inverter, so the photovoltaic output power measuring circuit is commonly referred to as a grid connection output power measuring circuit, the singlechip is used for transmitting a measuring signal of the photovoltaic output power measuring circuit to the upper computer, the upper computer is used for calculating the equivalent output electromotive force of the current photovoltaic power generation based on the measuring signal of the photovoltaic output power measuring circuit, the upper computer is also used for calculating the equivalent current by the equivalent output electromotive force of the photovoltaic power generation and outputting a control parameter adjusted to the stepper motor according to the change parameter of the equivalent current, and the singlechip is also used for converting the control parameter adjusted to the stepper motor into a corresponding electric signal to be loaded to the stepper motor controller and then regulating and controlling the stepper motor of the photovoltaic panel rotating shaft by the stepper motor controller; the upper computer calculates the equivalent output electromotive force y of the current photovoltaic power generation based on the measurement signal of the photovoltaic output power measurement circuit, wherein y=y m * sin (wt), wherein w is constant, t is time, y m Calculating an equivalent current i (t), i (t) =e from an equivalent output electromotive force of photovoltaic power generation as a constant (-B*t/p) wpy m /(B 2 +w 2 p 2 )+(B*sin(wt)-wp*cos(wt))y m /(B 2 +w 2 p 2 ) Wherein B is an output equivalent resistance value, p is an output equivalent inductance value, and the variation parameter of the equivalent current specifically refers to a first derivative of the equivalent current with time, i.e. i (t) =e (-B*t/p) wpy m /(B 2 +w 2 p 2 )+(B*sin(wt)-wp*cos(wt))y m /(B 2 +w 2 p 2 ) The method comprises the steps that a first derivative of time t is obtained, an upper computer outputs control parameters for adjusting a stepping motor based on change parameters according to equivalent current, the upper computer obtains change parameters V1 of the equivalent current in a first time period, then a weighting coefficient is modified based on the change parameters V1 of the equivalent current, and the control parameters for adjusting the stepping motor are predicted by an exponential smoothing method.
Further the upper computer obtains the data fromThe method comprises the steps of modifying a weighting coefficient based on a change parameter V1 of equivalent current in a first time period, predicting a control parameter adjusted by a stepping motor by an exponential smoothing method, specifically pre-establishing a mapping relation between the change parameter V of the equivalent current and the weighting coefficient alpha adjusted by the stepping motor in the exponential smoothing method, calculating the control parameter adjusted by a certain stepping motor by the exponential smoothing method, determining a corresponding weighting coefficient alpha by looking up a mapping table according to the change parameter V of the equivalent current in a last time period before calculating, and then carrying out different weighted distribution on the actual value and the predicted value of the control parameter adjusted by the stepping motor by the exponential smoothing method to obtain an exponential smoothing value serving as a predicted value of the control parameter adjusted by the stepping motor in a next period, wherein the prediction formula is as follows: xt=αs t-1 +(1-α)X t-1 ，(0<α<1) Wherein Xt is the predicted value of the control parameter for regulating the stepping motor in the t-th period, S t-1 The actual value of the control parameter which is adjusted for the stepping motor in the last period; x is X t-1 A control parameter predicted value which is adjusted for the stepping motor in the previous period; alpha is a weighting coefficient, and the exponential smoothing method has the advantages of a moving average method, can reduce the data storage capacity in the operation process, also considers different roles of data in different periods, and has high prediction accuracy.
The invention also discloses an intelligent regulation and control method for the vertical relation between the photovoltaic and solar light rays, which comprises the following steps of:
the single chip microcomputer transmits a measurement signal of the photovoltaic output power measurement circuit to the upper computer, the upper computer calculates the current equivalent output electromotive force of photovoltaic power generation based on the measurement signal of the photovoltaic output power measurement circuit, the upper computer calculates equivalent current from the equivalent output electromotive force of the photovoltaic power generation and outputs control parameters for adjusting the stepping motor according to the change parameters of the equivalent current, the single chip microcomputer also converts the control parameters for adjusting the stepping motor into corresponding electric signals to be loaded to the stepping motor controller, and then the stepping motor controller regulates and controls the stepping motor of the rotating shaft of the photovoltaic panel; the relation between the photovoltaic and the solar light is adjusted by rotating the photovoltaic panel rotating shaft stepping motor. It will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The intelligent regulation and control system for the vertical relation between the photovoltaic and the solar light rays is characterized by comprising a photovoltaic panel rotating shaft stepping motor, a stepping motor controller, a photovoltaic output power measuring circuit, a singlechip and an upper computer, wherein the singlechip is used for transmitting a measuring signal of the photovoltaic output power measuring circuit to the upper computer, the upper computer is used for calculating the equivalent output electromotive force of the current photovoltaic power generation based on the measuring signal of the photovoltaic output power measuring circuit, the upper computer is also used for calculating equivalent current by the equivalent output electromotive force of the photovoltaic power generation and outputting a control parameter for regulating the stepping motor according to a change parameter of the equivalent current, and the singlechip is also used for converting the control parameter for regulating the stepping motor into a corresponding electric signal to be loaded to the stepping motor controller and then regulating and controlling the photovoltaic panel rotating shaft stepping motor by the stepping motor controller.
2. The intelligent regulation and control system for the vertical relationship between the photovoltaic and the solar light rays according to claim 1, wherein the photovoltaic panel rotating shaft stepper motor specifically refers to a stepper motor linked with a photovoltaic panel rotating shaft, and the stepper motor is used for controlling the rotating angle of the photovoltaic panel so as to control the relationship between the photovoltaic and the solar light rays.
3. The intelligent regulation and control system for the vertical relationship between photovoltaic and solar light rays according to claim 1, wherein the photovoltaic output power measurement circuit refers to a grid-connected output power measurement circuit.
4. The intelligent regulation and control system for vertical relationship between photovoltaic and solar light rays according to claim 1, wherein the upper computer calculates based on measurement signals of the photovoltaic output power measurement circuitThe equivalent output electromotive force y of the current photovoltaic power generation is obtained, and y=y m * sin (wt), wherein w is constant, t is time, y m Is constant.
5. The intelligent regulation system for the vertical relationship between photovoltaic and solar light rays according to claim 1, wherein the equivalent current i (t), i (t) =e is calculated by the equivalent output electromotive force of photovoltaic power generation (-B*t/p) wpy m /(B 2 +w 2 p 2 )+(B*sin(wt)-wp*cos(wt))y m /(B 2 +w 2 p 2 ) Wherein B is an output equivalent resistance value, and p is an output equivalent inductance value.
6. The intelligent regulation system for the vertical relationship between photovoltaic and solar light rays according to claim 1, wherein the variation parameter of the equivalent current specifically refers to the first derivative of the variation of the equivalent current with the amount of time, i (t) =e (-B*t/p) wpy m /(B 2 +w 2 p 2 )+(B*sin(wt)-wp*cos(wt))y m /(B 2 +w 2 p 2 ) The first derivative of the amount of time t.
7. The intelligent regulation and control system for the vertical relationship between photovoltaic and solar light rays according to claim 1, wherein the upper computer outputs control parameters for regulating the stepping motor based on the change parameters according to the equivalent current, the upper computer obtains the change parameters V1 of the equivalent current in a first time period, and then modifies the weighting coefficient based on the change parameters V1 of the equivalent current, and predicts the control parameters for regulating the stepping motor by adopting an exponential smoothing method.
8. The intelligent regulation and control system for the vertical relationship between photovoltaic and solar light according to claim 7, wherein the upper computer obtains a variation parameter V1 of the equivalent current in a first time period, then modifies a weighting coefficient based on the variation parameter V1 of the equivalent current, and predicts a control parameter for adjusting the stepper motor by an exponential smoothing method, specifically:
the method comprises the steps of establishing a mapping relation between a change parameter V of equivalent current and a weighting coefficient alpha for predicting the adjustment of a stepping motor in an exponential smoothing method in advance, calculating the control parameter of the adjustment of a certain stepping motor by the exponential smoothing method, determining the corresponding weighting coefficient alpha by looking up a mapping table for the change parameter V of the equivalent current in the previous time period before calculation, and then carrying out different weighted distribution on the actual value and the predicted value of the control parameter of the adjustment of the stepping motor by the exponential smoothing method by using the actual value and the predicted value of the control parameter of the adjustment of the stepping motor in the previous period to obtain an exponential smoothing value which is used as the predicted value of the control parameter of the adjustment of the stepping motor in the next period, wherein the prediction formula is as follows: xt=αs t-1 +(1-α)X t-1 ，(0<α<1) Wherein Xt is the predicted value of the control parameter for regulating the stepping motor in the t-th period, S t-1 The actual value of the control parameter which is adjusted for the stepping motor in the last period; x is X t-1 A control parameter predicted value which is adjusted for the stepping motor in the previous period; alpha is a weighting coefficient, and the exponential smoothing method has the advantages of a moving average method, can reduce the data storage capacity in the operation process, also considers different roles of data in different periods, and has high prediction accuracy.
9. The intelligent regulation and control system for vertical relation between photovoltaic and solar light rays according to claim 1, wherein the intelligent regulation and control method of the system comprises the following steps: the single chip microcomputer transmits a measurement signal of the photovoltaic output power measurement circuit to the upper computer, the upper computer calculates the current equivalent output electromotive force of photovoltaic power generation based on the measurement signal of the photovoltaic output power measurement circuit, the upper computer calculates equivalent current from the equivalent output electromotive force of the photovoltaic power generation and outputs control parameters for adjusting the stepping motor according to the change parameters of the equivalent current, the single chip microcomputer also converts the control parameters for adjusting the stepping motor into corresponding electric signals to be loaded to the stepping motor controller, and then the stepping motor controller regulates and controls the stepping motor of the rotating shaft of the photovoltaic panel; the relation between the photovoltaic and the solar light is adjusted by rotating the photovoltaic panel rotating shaft stepping motor.
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