CN-117536796-B - Tower drum, tower drum foundation monitoring system and monitoring method

CN117536796BCN 117536796 BCN117536796 BCN 117536796BCN-117536796-B

Abstract

The invention provides a tower and a tower foundation monitoring system and a monitoring method, wherein the monitoring system comprises a sensor monitoring module, an acquisition module and an edge calculation module which are sequentially connected, the sensor monitoring module comprises a load sensor arranged at a concrete tower section, a biaxial inclination sensor arranged on a connecting flange at the bottom of the tower or on the foundation surface of the tower bottom, and a stay wire sensor arranged at a transverse joint and a longitudinal joint of the concrete tower and at the top of the foundation of the tower, the edge calculation module is connected with a fan main control, the data analysis result is fed back to the fan main control, and the fan main control carries out remote alarm on dangerous information. The monitoring system monitors the tower load, the tower bottom settlement, the tower foundation cracking and the transverse and longitudinal joints of the concrete tower, establishes the rechecking relation among all monitoring data, has high accuracy of monitoring results, can early warn in time and intervene manually in advance, and ensures the safe operation of the unit.

Inventors

LI JI
WANG YANG
ZHANG LEI
YOU LIZHI
WANG SHUAI
ZHANG XUEFENG

Assignees

金湖县海新能源有限公司

Dates

Publication Date: 20260508
Application Date: 20231020

Claims (6)

1. The utility model provides a monitoring system for monitor tower section of thick bamboo and tower section of thick bamboo basis, the tower section of thick bamboo is a slice type concrete tower section of thick bamboo, and monitoring system installs on a slice type concrete tower section of thick bamboo and tower section of thick bamboo basis, including sensor monitoring module, collection module and the edge calculation module that connects gradually, its characterized in that, sensor monitoring module includes: the load sensors are distributed on the side wall of each section of concrete tower barrel section along the circumferential direction, and one of the load sensors at each section of concrete tower barrel section is installed at the azimuth position with the greatest annual wind direction distribution; The system comprises a tower cylinder, a double-axial dip angle sensor, a3, a double-axial dip angle sensor, a same-direction absolute value extraction and comparison, wherein the two double-axial dip angle sensors are arranged on a connecting flange at the bottom of the tower cylinder or a foundation surface at the bottom of the tower cylinder, and the arrangement positions of the two double-axial dip angle sensors meet the following conditions that a1, the two double-axial dip angle sensors are all positioned on a circumference taking the center of the tower cylinder as the center of a circle, and the included angle between the two double-axial dip angle sensors is 90 degrees; the pull wire sensor comprises a conductive sensing wire and an on-off monitoring unit, wherein the conductive sensing wire is arranged at a transverse joint and a longitudinal joint of the concrete tower and is embedded at the top in a tower foundation, the on-off monitoring unit is connected with the conductive sensing wire and monitors on-off of the conductive sensing wire, and the on-off monitoring module is connected with the acquisition module; the edge calculation module is connected with the fan main control, and feeds back the data analysis result to the fan main control, and the fan main control carries out remote alarm on dangerous information; The monitoring method of the monitoring system comprises the following steps: s1, arranging a load sensor, a biaxial inclination angle sensor and a stay wire sensor on a concrete tower drum and a tower drum foundation, connecting the sensors into an acquisition module, and connecting the acquisition module with an edge calculation module; S2, load sensors monitor load data in all directions in the running process of the unit, biaxial inclination sensors monitor inclination data of horizontal directions and vertical directions, and stay wire sensors monitor on-off signals of conductive sensing wires at transverse joints, longitudinal joints and in tower foundation; S3, the acquisition module acquires the monitoring data of each sensor and transmits the monitoring data to the edge calculation module, the edge calculation module analyzes and processes the monitoring data to generate feedback of whether the related unit runs safely or not, and the specific steps are as follows: s31, analyzing and processing load data by an edge calculation module, judging whether the load data exceeds a load threshold value and feeding back, and if the load data exceeds the threshold value, taking load reduction measures by a fan main control to reduce the load to be below the threshold value; S32, analyzing and processing inclination angle data by an edge computing module, computing the inclination angle and the settlement condition of the tower, judging whether the settlement and inclination value threshold value is exceeded or not, feeding back the settlement and inclination value threshold value, if the settlement and inclination value threshold value is exceeded, remotely alarming by a fan main control, rechecking the inclination angle data and the load data, further remotely determining the safety of the unit, and manually intervening in advance; the concrete method for calculating the inclination angle and settlement of the tower cylinder comprises the steps of averaging two homodromous absolute values of two biaxial inclination angle sensors, taking an arithmetic square root, and combining the diameter value of the tower bottom to obtain a corresponding settlement value; The specific step of rechecking the inclination angle data and the load data comprises the following steps of alarming again if the load threshold value is not more than the load threshold value of which the load maximum value is not more than 1.1 times and the duration exceeds the set duration t1, and if the load maximum value is not more than 1.1 times and the duration exceeds the set duration t2, adopting load reducing measures by the fan main control to reduce the load maximum value to be below the threshold value; s33, the edge calculation module receives and feeds back on-off signals of the transverse joint and the longitudinal joint, if the breaking signals are fed back, the fan main control carries out remote alarm, and meanwhile, the on-off signals of the transverse joint and the longitudinal joint and the feedback condition of the load sensor are rechecked, whether the machine is stopped or not is judged, and human intervention is carried out in advance; checking the load value of the tower and the running parameters of the unit, if the breaking signals are fed back, the unit is synchronously in a load threshold value which is less than or equal to the load maximum value and less than or equal to 1.1 times of the load threshold value, and if the breaking signals are fed back, the feathering is stopped in time; S34, the edge calculation module receives and feeds back the on-off signal in the tower foundation, if the breaking signal is fed back, the fan main control carries out remote alarm, and meanwhile, the on-off signal in the tower foundation and the feedback condition of the double-axial inclination sensor are rechecked, so that whether the machine is stopped or not is judged, and human intervention is carried out in advance; Checking the inclination angle monitoring value of the biaxial inclination angle sensor, and stopping in time if the inclination angle monitoring value is obviously improved or the inclination angle monitoring value is more than or equal to the inclination angle threshold value.
2. The monitoring system of claim 1, wherein the conductive sensing lines at the transverse joint and the longitudinal joint are distributed in a serpentine manner along two sides of the joint, the conductive sensing lines embedded in the tower foundation comprise circumferential sensing lines and radial sensing lines, the circumferential sensing lines are distributed and embedded in a plurality of pieces by taking the center of the tower foundation as the center of a circle, and the radial sensing lines are routed along the radial winding of the tower foundation.
3. The monitoring system of claim 2, wherein the conductive sensing wire is an enameled wire or a stainless steel wire.
4. The monitoring system according to claim 2, wherein the circumferential sensing line and the radial sensing line are pre-buried at the top in the concrete pouring process of the tower foundation, or the circumferential sensing line and the radial sensing line are pre-buried after the tower foundation is completed and are sealed by adopting the same-property concrete material.
5. The monitoring system of claim 1, wherein the acquisition module is a multi-serial acquisition instrument for realizing the access of each sensor, the edge calculation module is integrated in a tower bottom cabinet, and the tower bottom cabinet supplies power for the whole monitoring system.
6. The monitoring system of claim 1, wherein the edge calculation module obtains wind parameters and unit operation parameters collected by the unit in the main control of the fan, and performs combined analysis with the monitoring data.

Description

Tower drum, tower drum foundation monitoring system and monitoring method Technical Field The invention relates to the technical field of monitoring of concrete sections of mixed towers, in particular to a tower and a tower foundation monitoring system and a monitoring method. Background The wind generating set is used as an important part of new energy, and the development speed of the wind generating set is rapid. With the continuous deep development of wind resources and the development of III-class and VI-class wind areas, the height of the tower barrel of the wind turbine generator is continuously increased, and the mixed tower is increasingly widely applied due to the characteristics of stable generating capacity, no damper, low maintenance cost, good stability of the generator set and the like of the mixed tower barrel. The split type concrete tower barrel in the mixed tower can be produced in an on-site pouring or prefabricating mode, so that the transportation cost and the purchasing cost can be effectively reduced. The tower drum is continuously increased in height and the unit capacity is continuously increased, so that the dynamic load transmitted by the blades is continuously increased, the dynamic load is transmitted downwards along the tower drum of the wind power generator unit until the dynamic load is transmitted to a foundation, the tower bottom and the tower bear final loads in the process, and the change and abnormality of the unit load can be concentrated to show the change of the load of the tower drum. When the bearing load exceeds the design range, the phenomena of tower inclination, foundation settlement and the like are likely to occur, and great risks are brought to the safe operation of the unit. The split type concrete tower barrel is formed by splicing multiple sections of concrete tower barrels up and down, each section of concrete tower barrel is formed by splicing more than two sections of concrete tower barrels, the joint is more, the height of the mixed tower is more than 180m, and when the load of the unit exceeds the bearing capacity of the tower barrels or local defects occur, the unit is particularly obvious at the joint, so that the monitoring of the concrete section tower barrels and foundations of the mixed tower barrels is of great significance for the safe operation of the unit. The traditional monitoring means is to observe the condition of a sedimentation point of a fan foundation and a concrete section manually, and the condition is influenced by geographical weather, artificial quality and the like, so that the observation is not timely or inaccurate. The patent CN116517788A discloses an on-line monitoring system for the structural health of a concrete tower of a wind turbine generator, which comprises a data acquisition module, a data transmission module, a data processing module and a user interface, wherein the data acquisition module comprises an inclination sensor, an acceleration sensor, a strain sensor and a data arrangement module, the inclination sensor is used for acquiring inclination angle information of the top inclination angle and the bottom inclination angle of the concrete tower, the acceleration sensor is used for acquiring vibration information of the concrete tower, the strain sensor is used for acquiring deformation information of steel strands in the structure of the concrete tower, the data acquisition module is used for acquiring monitoring data of each part of the concrete tower, and the overall health state of the concrete tower is generated in real time through each part of health state. The abnormal condition of the structure can be found in time, serious accidents of the structure are avoided, and the safety of the structure is improved. The online monitoring system has the following problems that (1) the joint of the concrete sheet of the concrete tower can is not monitored, the abnormal condition of the joint can not be visually reflected, and (2) the change value of the inclination and strain data can be detected only after the tower is inclined and the steel stranded wires are deformed, and then the health state of the tower can be judged, so that the monitoring of the inclination and strain data has hysteresis and insensitivity, and the intervention protection can not be timely carried out. Disclosure of Invention The invention provides a tower and a tower foundation monitoring system and a monitoring method, wherein the monitoring system monitors the load of the tower, the sedimentation at the bottom of the tower, the cracking of the tower foundation and the transverse and longitudinal joints of a concrete tower, establishes the rechecking relation among all monitoring data, has high accuracy of monitoring results, can early warn in time and perform manual intervention in advance, and ensures the safe operation of a unit. The technical scheme adopted for achieving the purposes of the invention is as follows: the utility mode