CN-121979299-A - Flat unipolar tracking system of photovoltaic support

CN121979299ACN 121979299 ACN121979299 ACN 121979299ACN-121979299-A

Abstract

The invention discloses a flat single-axis tracking system of a photovoltaic bracket, which relates to the technical field of angle regulation and control systems of photovoltaic brackets and comprises a time sequence reference circuit, wherein the time sequence reference circuit comprises high-steady-state clock hardware with independent energy source maintenance topology, provides an irreversible global time stamp index for the system, outputs a current accurate time stamp, ensures that the time sequence error is less than or equal to +/-1 ms, provides accurate basis for time interval retrieval, and is provided with a standby clock signal to cope with an RTC fault scene and ensure continuous operation of the system. A photovoltaic bracket flat single-axis tracking system thoroughly eliminates tracking oscillation and misjudgment caused by random disturbance of ambient light by constructing a deterministic control model decoupled from the environment, and simultaneously realizes track robustness of all-weather dimension, so that the system can output rigid instructions according to a built-in space-time model without depending on feedback of an external light sensor, and ensures convergence and stability of tracking precision under any meteorological condition.

Inventors

ZHANG GUOLIANG
SUN FANG
ZHENG BOREN
WANG LINLIN

Assignees

苏州鲁南紧固系统有限公司

Dates

Publication Date: 20260505
Application Date: 20260205

Claims (9)

1. The flat single-axis tracking system of photovoltaic support is characterized in that, this flat single-axis tracking system of photovoltaic support includes: the time sequence reference circuit is provided with independent energy source maintenance topology high-steady-state clock hardware, provides irreversible global time stamp indexes for the system, outputs current accurate time stamps, ensures that time sequence errors are less than or equal to +/-1 ms, provides accurate basis for time interval retrieval, and is provided with standby clock signals so as to cope with RTC fault scenes and ensure continuous operation of the system; the data storage module is used for solidifying a nonvolatile storage medium with celestial body kinematics model parameters, completing hardware-level mapping from a time domain to a space angle domain, presetting a space-time track matrix based on local longitude and latitude, a seasonal solar altitude change rule and photovoltaic module photoelectric conversion efficiency optimization, supporting power failure reservation and annual update, storing a key value pair set of a discretization time node and a corresponding theoretical optimal inclination angle, and reducing operation pressure without real-time astronomical calculation; The edge operation control module is used for bearing core tasks such as track mapping operation, control deviation calculation, driving decision output and the like, adapting to a low-computational-force scene, and simultaneously being central processing hardware of an integrated kinematic solution engine and responsible for real-time throughput of multidimensional data flow and vector instruction generation; the closed-loop control module is used for collecting the actual physical angle of the photovoltaic bracket, providing feedback data for closed-loop control and corresponding to the collection requirement in the original control logic; The action execution control module is used for automatically receiving a driving instruction of the MCU, driving the photovoltaic bracket to rotate around the flat single shaft, realizing rigid fitting of the actual angle and the target angle, and corresponding to a motor driving and executing mechanism in the original control logic; the system stability guarantee module is used for providing auxiliary support for stable operation of the system, coping with various abnormal scenes and coping with abnormal processing and fault tolerance design in the original scheme.
2. The flat single-axis tracking system of the photovoltaic bracket according to claim 1, wherein the edge operation control module comprises an edge operation core unit, an algorithm operation unit, a data preprocessing unit and a data output unit, wherein the edge operation core unit adopts an edge operation core MCU for taking charge of real-time throughput and vector instructions of a multidimensional data stream, simultaneously reading actual angle feedback data, calculating control deviation, executing dead zone judgment and driving decision, and simultaneously taking less than or equal to 10ms for operation.
3. The flat single-axis tracking system of a photovoltaic bracket according to claim 2, wherein the algorithm operation unit is internally provided with a time sequence index and track mapping algorithm and a differential comparison and dead zone suppression compound control algorithm, and comprises auxiliary operation logic such as offset filtering, dynamic dead zone adaptation and the like, so as to ensure operation precision and control stability, the data preprocessing unit is used for automatically comparing calculated data, if the calculated data exceeds a set threshold value, the algorithm operation unit is controlled to recalculate, and if the calculated data is within the threshold value range, the data is transmitted to the data output unit and is sent to a subsequent module through the data output unit for subsequent operation.
4. The flat single-axis tracking system of the photovoltaic bracket according to claim 1, wherein the closed-loop control module is composed of a double-axis angle sensor and a standby angle calculating unit, wherein the double-axis angle sensor is a core detection component, the detection precision is required to be within +/-0.1 DEG, the current actual physical angle of the photovoltaic array is acquired in real time at the frequency of 10Hz, the data is fed back to the MCU in real time, and meanwhile, the closed-loop control module is required to have a signal anti-interference design so as to reduce the influence of environmental noise on the detection precision.
5. The flat single-axis tracking system of a photovoltaic bracket according to claim 4, wherein the standby angle calculation unit is configured to automatically switch to a time integral angle calculation mode when an abnormality occurs in feedback of the angle sensor, and to perform indirect integral calculation by recording an effective operation time of the motor and a rated angular speed of an output shaft of the speed reducer, so as to ensure that a feedback link is not interrupted.
6. The flat single-axis tracking system of the photovoltaic bracket according to claim 1, wherein the action execution control module comprises a power vector modulation unit, a driving motor control unit, an electromagnetic braking control unit and a flat single-axis mechanical bracket control unit, the power vector modulation unit is used for automatically converting logic level into a power level circuit of high-energy driving pulse, the direct coupling execution mechanism is used for receiving driving decision signals of the MCU, outputting driving signals with adjustable duty ratio, the duty ratio is positively correlated with absolute value of control deviation, dynamic adjustment of motor rotation speed is achieved, and angle adjustment efficiency is improved.
7. The flat single-axis tracking system of a photovoltaic bracket according to claim 6, wherein the driving motor control unit is used for driving the motor to run, forward and reverse rotation can be achieved, meanwhile, the angle adjustment instruction of the MCU is responded, the electromagnetic braking control unit is used for controlling braking to automatically trigger when the system enters a standby locking state so as to lock the current angle of the photovoltaic bracket, prevent angular deviation caused by external forces such as wind force and the like, protect a mechanical structure and the motor, and the flat single-axis mechanical bracket control unit is used for controlling the photovoltaic assembly to rotate around a horizontal axis.
8. The flat single-axis tracking system of a photovoltaic bracket according to claim 1, wherein the system stability guarantee module comprises an abnormality alarm unit, a dynamic adaptation unit and an upper computer interaction interface, and the abnormality alarm unit is used for immediately triggering an audible and visual alarm to remind a worker to process in time when the RTC fails, an angle sensor is abnormal or a motor drive fails and the like, and recording fault information.
9. The flat single-axis tracking system of the photovoltaic bracket according to claim 8, wherein the dynamic adapting unit is used for automatically adjusting the dead zone threshold range according to the ambient wind speed, expanding the threshold value when the wind speed is more than or equal to 5m/s to inhibit jitter, recovering the default threshold value when the wind speed is less than 5m/s to give consideration to precision and stability, and the upper computer interaction interface is used for supporting calibration and updating of parameters such as the dead zone threshold value, the track matrix and the like, so that the staff can optimize the system performance according to the actual application scene conveniently, and flexible adjustment of the parameters is realized.

Description

Flat unipolar tracking system of photovoltaic support Technical Field The invention relates to the technical field of photovoltaic support angle regulation and control systems, in particular to a photovoltaic support flat single-axis tracking system. Background As the physical limits of photovoltaic energy conversion efficiency are continuously approached, photovoltaic tracking technology based on kinematic gesture optimization has become a critical path for improving energy efficiency. The technology aims at maximizing luminous flux by adjusting the space normal vector of the photovoltaic array in real time so as to keep the minimum included angle with the solar incidence vector; However, the passive photoinduction of the existing system is highly dependent on the ambient luminous flux, under the nonlinear meteorological conditions of cloudiness, scattering, local shielding and the like, the system is extremely easy to fall into random oscillation and local optimizing failure, so that the energy efficiency conversion rate (ECE) is suddenly reduced, and meanwhile, the traditional discrete hardware architecture has the inherent defects of redundancy of a signal link and volatile space-time reference. Under the disturbance of a complex electromagnetic environment and a power supply, the system lacks the logic self-healing capability and absolute time sequence continuity of the bottom layer, and cannot realize industrial-grade unattended operation and maintenance. Disclosure of Invention The invention aims to provide a flat single-axis tracking system of a photovoltaic bracket, which aims to solve the problems in the background technology. In order to achieve the purpose, the invention provides the following technical scheme that the photovoltaic bracket flat single-axis tracking system comprises: the time sequence reference circuit is provided with independent energy source maintenance topology high-steady-state clock hardware, provides irreversible global time stamp indexes for the system, outputs current accurate time stamps, ensures that time sequence errors are less than or equal to +/-1 ms, provides accurate basis for time interval retrieval, and is provided with standby clock signals so as to cope with RTC fault scenes and ensure continuous operation of the system; the data storage module is used for solidifying a nonvolatile storage medium with celestial body kinematics model parameters, completing hardware-level mapping from a time domain to a space angle domain, presetting a space-time track matrix based on local longitude and latitude, a seasonal solar altitude change rule and photovoltaic module photoelectric conversion efficiency optimization, supporting power failure reservation and annual update, storing a key value pair set of a discretization time node and a corresponding theoretical optimal inclination angle, and reducing operation pressure without real-time astronomical calculation; The edge operation control module is used for bearing core tasks such as track mapping operation, control deviation calculation, driving decision output and the like, adapting to a low-computational-force scene, and simultaneously being central processing hardware of an integrated kinematic solution engine and responsible for real-time throughput of multidimensional data flow and vector instruction generation; the closed-loop control module is used for collecting the actual physical angle of the photovoltaic bracket, providing feedback data for closed-loop control and corresponding to the collection requirement in the original control logic; The action execution control module is used for automatically receiving a driving instruction of the MCU, driving the photovoltaic bracket to rotate around the flat single shaft, realizing rigid fitting of the actual angle and the target angle, and corresponding to a motor driving and executing mechanism in the original control logic; the system stability guarantee module is used for providing auxiliary support for stable operation of the system, coping with various abnormal scenes and coping with abnormal processing and fault tolerance design in the original scheme. Further, the edge operation control module comprises an edge operation core unit, an algorithm operation unit, a data preprocessing unit and a data output unit, wherein the edge operation core unit adopts an edge operation core MCU for taking charge of real-time throughput and vector instruction (target attitude vector generation) of multidimensional data streams (RTC time data and angle feedback data), reading RTC time stamps in real time through an I2C/SPI interface, performing track mapping operation (time interval retrieval and linear interpolation/direct mapping calculation), reading actual angle feedback data, calculating control deviation, performing dead zone judgment and driving decision, and simultaneously taking less than or equal to 10ms for operation. Furthermore, the algorithm operation unit is inte