CN-121984442-A - Real-time monitoring system and method for photovoltaic power generation equipment

CN121984442ACN 121984442 ACN121984442 ACN 121984442ACN-121984442-A

Abstract

The invention discloses a real-time monitoring system and a method for photovoltaic power generation equipment, which are characterized in that an attitude sensor is adopted to obtain each attitude pressure distribution map of a rotating center shaft of a tracking bracket in advance, then a plurality of real-time radial pressure values of the circumference of the rotating center shaft of the tracking bracket are obtained based on a pressure sensor array, the direct stress condition of the rotating center shaft of the tracking bracket is calculated, a photovoltaic panel assembly is protected and adjusted according to a calculation result, the dynamic load is monitored in real time in combination with the preset pressure distribution map, an early signal of instability of the rotating center shaft can be identified, catastrophic collapse is prevented, the traditional passive, integral and empirical maintenance is converted into active, accurate and data-driven predictive management, the safety and the power generation efficiency of a photovoltaic power station are improved, a maintenance personnel terminal remotely grasps the health state of all the tracking brackets through the terminal to carry out predictive maintenance, and the operation and maintenance cost can be reduced.

Inventors

GE WEI
CHEN BO

Assignees

国网河北省电力有限公司

Dates

Publication Date: 20260505
Application Date: 20260210

Claims (10)

1. The photovoltaic power generation equipment real-time monitoring system is characterized by comprising a sensor module, a communication module, a remote control center and an execution module; The sensor module comprises a pressure sensor array, an attitude sensor and a time service module, wherein the pressure sensor array is used for collecting a plurality of radial pressure values in the circumferential direction of a rotation center axis of a tracking bracket, the attitude sensor is used for collecting the tracking attitude of a photovoltaic panel, and the time service module is used for associating the collected radial pressure value data with the corresponding collecting time of the tracking attitude data; The communication module is used for sending the plurality of radial pressure values and the tracking gesture acquired by the sensor module and the corresponding acquisition time to a remote control center; the remote control center calculates the duration time of a plurality of radial pressure values according to the received tracking gesture, and judges whether the tracking bracket is abnormal according to the calculation result; And the execution module executes corresponding protection actions according to the received control instructions.
2. The photovoltaic power generation device real-time monitoring system according to claim 1, wherein the pressure sensor array is configured to collect a plurality of radial pressure values of a circumference of a rotation center axis of the tracking bracket, and specifically includes: The pressure sensor array is a gasket type pressure sensor array arranged between a tracking bracket bearing seat and a rotating center shaft connecting flange, N pressure sensors are uniformly arranged on the circumference of a circumferential gasket, radial pressure values of the corresponding connecting positions of the bearing seat and the rotating center shaft are collected, and N is an integer greater than or equal to 6.
3. The photovoltaic power generation device real-time monitoring system according to claim 1, wherein the remote control center comprises a pressure sensor array monitoring module, the pressure sensor array monitoring module is configured to determine whether the gasket-type pressure sensor is abnormal according to the collected radial pressure values before the remote control center calculates the duration of the radial pressure values according to the received tracking gesture, and if so, the remote control center pushes the early warning notification to the maintenance personnel terminal.
4. The photovoltaic power generation device real-time monitoring system according to claim 3, wherein the determining whether the gasket-type pressure sensor has an abnormality specifically comprises: The pressure sensor array monitoring module acquires a plurality of radial pressure values acquired at the same acquisition time, draws a real-time pressure distribution curve, and determines that an abnormal pressure sensor exists among a plurality of pressure sensors in the pressure sensor array if the pressure value in the real-time pressure distribution curve is suddenly changed or is asymmetric.
5. The photovoltaic power generation equipment real-time monitoring system according to claim 3, wherein the remote control center further comprises a calculation module and an abnormality judgment module, the calculation module extracts a pressure distribution diagram corresponding to the tracking gesture from a database according to the received tracking gesture after the pressure sensor array monitoring module judges that no abnormality exists, and then calculates a difference value and a pressure difference duration time between a plurality of received radial pressure values around the rotation center axis and pressure values at corresponding positions in the pressure distribution diagram respectively; the abnormality judging module is used for judging whether the rotation center shaft is abnormal according to the positive maximum value in the plurality of difference values, the duration time of the positive maximum value and the pressure distribution diagram, and if the rotation center shaft is abnormal, the remote control center is informed to send a corresponding control instruction to the executing module.
6. The photovoltaic power generation device real-time monitoring system according to claim 5, wherein the abnormality determination module is configured to determine whether there is an abnormality in the rotation center axis according to a positive maximum value of the plurality of difference values, a duration of the positive maximum value, and a pressure distribution map, and specifically comprises: the abnormality judging module judges whether the real-time pressure at the forward maximum value indicating position is the maximum value in the current pressure sensor array or not, if yes, judges whether the real-time pressure value at the forward maximum value indicating position exceeds a first preset threshold value or not, if yes, further judges whether the duration of the pressure difference value exceeds a first time threshold value or not, if yes, the remote control center sends a protection instruction to the executing module, and the executing module drives the photovoltaic module to rotate towards the position opposite to the forward maximum value indicating position; If the real-time pressure at the positive maximum value indication position is not the maximum value in the current pressure sensor array, the abnormality determination module also calculates an included angle between the positive maximum value indication position and the pressure maximum value indication position Judging whether the real-time pressure value at the position indicated by the forward maximum value exceeds a first preset threshold value, if so, further judging whether the duration of the pressure difference value exceeds a first time threshold value, and if so, sending a protection instruction to the execution module by the remote control center, wherein the execution module drives the photovoltaic module to face The angular indication rotates at a position opposite to the position.
7. The photovoltaic power generation device real-time monitoring system of claim 6, wherein the anomaly determination module is further configured to determine: if the forward maximum value indication position continuously changes within the second time threshold and the forward maximum value exceeds the second preset threshold, the remote control center sends a protection instruction to the execution module, and the execution module drives the photovoltaic module to rotate to the horizontal position and keep locked.
8. The photovoltaic power generation device real-time monitoring system according to claim 5, wherein the remote control center further comprises an extraction module, specifically comprising: And eliminating external factor interference in a closed environment of a laboratory, acquiring a circumferential pressure distribution map of a rotating center shaft of a tracking bracket under each tracking gesture of the photovoltaic panel through a test, and storing the circumferential pressure distribution map into a database, wherein the extraction module searches and acquires the pressure distribution map corresponding to the real-time tracking gesture from the database after acquiring the real-time tracking gesture of the photovoltaic panel.
9. The real-time monitoring method for the photovoltaic power generation equipment is characterized by comprising the following steps of: S1, acquiring a circumferential pressure distribution map of a rotation center shaft of a tracking bracket in a test state; S2, the sensor module acquires a plurality of radial pressure values in the circumferential direction of a rotating center shaft of the tracking bracket and tracking postures of the photovoltaic panel, and associates corresponding acquisition time for acquired radial pressure value data and tracking posture data; s3, calculating duration time of a plurality of radial pressure values according to the acquired tracking gesture, and comprehensively judging whether the tracking bracket is abnormal according to a calculation result and the pressure distribution diagram; s4, the execution module executes corresponding protection actions according to the received control instructions.
10. The method for real-time monitoring of a photovoltaic power generation device according to claim 9, wherein: the step S1 specifically comprises the steps of eliminating external factor interference in a closed environment of a laboratory, obtaining a circumferential pressure distribution map of a tracking bracket in rotation under each tracking gesture of a photovoltaic panel through a test, and storing the circumferential pressure distribution map in a database.

Description

Real-time monitoring system and method for photovoltaic power generation equipment Technical Field The invention relates to the field of real-time monitoring of photovoltaic power generation equipment, in particular to a real-time monitoring system and method for a tracking bracket in the photovoltaic power generation equipment. Background With the increasing emphasis of energy crisis and environmental pollution problems, research and utilization of new energy sources, such as wind, light, and hydroelectric power generation equipment, is increasingly important. In photovoltaic power plant applications, photovoltaic tracking brackets are increasingly being used as the number of photovoltaic power plants continues to increase, particularly in the construction of large ground-based photovoltaic power plants. Compared with the traditional fixed support, the tracking support enables the photovoltaic module to always keep the optimal tracking of the sun position by adjusting the orientation and the inclination angle of the photovoltaic module in real time, so that the energy output of the system is remarkably improved. The health degree of the photovoltaic tracking support directly influences the power generation efficiency, and because the large ground photovoltaic power station occupies a wide area, the photovoltaic power station generally builds a field unmanned area, the tracking support is huge in quantity and distributed and scattered, the traditional manual periodic inspection mode is low in efficiency and high in cost, and real-time fault discovery and early warning cannot be realized. In the absence of data support, fault localization and root cause analysis are difficult, potentially resulting in unnecessary large-scale component replacement or lengthy downtime. The existing photovoltaic power station tracking support monitoring system mainly adopts a sensor, such as wind speed and the like, to monitor and protect the tracking support, for example, the patent of the invention with publication number CN206481263U provides a double-shaft intelligent tracking photovoltaic support system capable of avoiding wind and snow, a wind speed and direction monitor and a rain and snow monitor are arranged to conduct intelligent protection control on the tracking support, but the tracking support is monitored only according to natural conditions, the stress condition of the tracking support is reflected from the side surface, the radial stress monitoring of the rotating center shaft of the tracking support cannot be directly realized, the monitoring precision is not high, abnormality cannot be timely found before the mechanical failure of the support occurs, and the tracking precision is reduced or even is completely out of alignment. Therefore, how to comprehensively and real-time monitor the state of the stress of the photovoltaic power station tracking bracket becomes a key for guaranteeing the efficient, stable and safe operation of the photovoltaic power station tracking bracket. Disclosure of Invention The invention aims to overcome the defects of the prior art, and provides a real-time monitoring system and method for photovoltaic power generation equipment, which adopt an attitude sensor to acquire an all-attitude pressure distribution map of a rotating center shaft of a tracking bracket in advance, then calculate the direct stress condition of the rotating center shaft of the tracking bracket based on a plurality of real-time radial pressure values of the circumference of the rotating center shaft acquired by a pressure sensor array, protect and adjust a photovoltaic panel assembly according to a calculation result, convert the traditional passive, integral and empirical maintenance into active, accurate and data-driven predictive management, and improve the safety and the power generation efficiency of a photovoltaic power station. The invention provides a photovoltaic power generation equipment real-time monitoring system, which comprises a sensor module, a communication module, a remote control center and an execution module, wherein the sensor module is connected with the communication module; The sensor module comprises a pressure sensor array, an attitude sensor and a time service module, wherein the pressure sensor array is used for collecting a plurality of radial pressure values in the circumferential direction of a rotation center axis of a tracking bracket, the attitude sensor is used for collecting the tracking attitude of a photovoltaic panel, and the time service module is used for associating the collected radial pressure value data with the corresponding collecting time of the tracking attitude data; The communication module is used for sending the plurality of radial pressure values and the tracking gesture acquired by the sensor module and the corresponding acquisition time to a remote control center; the remote control center calculates the duration time of a plurality of radial pressure v