CN-121997033-A - State monitoring method for offshore wind power foundation structure

CN121997033ACN 121997033 ACN121997033 ACN 121997033ACN-121997033-A

Abstract

The invention relates to the technical field of offshore wind power foundation structure monitoring, in particular to a state monitoring method of an offshore wind power foundation structure, which comprises the steps of collecting health characteristic information of a target offshore wind power foundation structure in a historical period; the method comprises the steps of analyzing a health characteristic representation value based on health characteristic information, judging whether stability of a target offshore wind power basic structure meets a standard or not based on a comparison result of the health characteristic representation value and a preset health characteristic representation threshold value, acquiring interference characteristic information of a target sea area environment in a history period when the stability meets the standard, analyzing the interference characteristic representation value based on the interference characteristic information, judging whether reliability of monitoring equipment is abnormal based on a comparison result of the interference characteristic representation value and the preset interference characteristic representation threshold value, calculating an interference index when the reliability is abnormal, and determining reasons of the reliability abnormality based on the interference index and matching corresponding processing strategies. The invention improves the monitoring reliability of the state of the offshore wind power foundation structure.

Inventors

LI YAN
LIU LIJIE
LIN BIN
CHEN YOUWEI
FU GUOQING
FENG JINGFEI

Assignees

深圳国能宸泰科技有限公司

Dates

Publication Date: 20260508
Application Date: 20260409

Claims (10)

1. A method for monitoring the condition of an offshore wind power infrastructure, comprising: Collecting health characteristic information of a target offshore wind power foundation structure in a historical period; Analyzing a health feature characterization value based on the health feature information; Judging whether the stability of the target offshore wind power foundation structure meets the standard or not based on the comparison result of the health characteristic representation value and a preset health characteristic representation threshold value; acquiring interference characteristic information of the target sea area environment in the historical period when the stability meets the standard; Analyzing an interference characteristic characterization value based on the interference characteristic information; judging whether the reliability of the monitoring equipment is abnormal or not based on the comparison result of the interference characteristic characterization value and a preset interference characteristic characterization threshold value; Calculating an interference index in response to the reliability anomaly; Determining a cause of the reliability anomaly based on the interference index and matching a corresponding processing strategy based on the cause, the processing strategy comprising determining an adjustment amplitude of a weight ratio of the first health factor to the second health factor and determining an adjustment amplitude of a predetermined health feature characterization threshold; The health characteristic information comprises ultrasonic wave propagation time and eddy current induced voltage, and the interference characteristic information comprises salinity of seawater and turbidity of the seawater.
2. The method of state monitoring of an offshore wind farm infrastructure according to claim 1, wherein the process of analyzing the health characterization value based on the health characterization information comprises: Extracting ultrasonic wave propagation time length and eddy current induction voltage of a target offshore wind power foundation structure in a history period; calculating the ratio of a preset ultrasonic wave propagation time threshold value to the ultrasonic wave propagation time length to determine a first health factor; Calculating a ratio of a preset eddy current induced voltage threshold value to the eddy current induced voltage to determine a second health factor; And summing the first health factor and the second health factor according to a preset first weight ratio to obtain a health characteristic representation value.
3. The method for monitoring the state of an offshore wind power infrastructure according to claim 1, wherein the process of analyzing the interference characteristic characterization value based on the interference characteristic information comprises: extracting the salinity of the seawater and the turbidity of the seawater in the target sea area environment in the history period; calculating a ratio of a predetermined salinity threshold to salinity to determine a first interference factor; calculating a ratio of a predetermined turbidity threshold to turbidity to determine a second interference factor; and summing the first interference factor and the second interference factor according to a preset second weight ratio to obtain an interference characteristic representation value.
4. The method of claim 1, wherein determining whether the stability of the target offshore wind turbine foundation structure meets a criterion based on the comparison of the health characterization value to a predetermined health characterization threshold comprises: If the health characteristic representation value is smaller than or equal to a preset health characteristic representation threshold value, determining that the stability does not accord with the standard; And if the health characteristic representation value is larger than a preset health characteristic representation threshold value, determining that the stability meets the standard.
5. The method for monitoring the state of a wind power infrastructure at sea according to claim 1, wherein the process of determining whether the reliability of the monitoring device is abnormal based on the comparison result of the interference characteristic characterization value and a predetermined interference characteristic characterization threshold value comprises: If the disturbance characteristic characterization values are smaller than or equal to a preset disturbance characteristic characterization threshold value, determining that the reliability is abnormal; And if the disturbance characteristic characterization values are larger than the preset disturbance characteristic characterization threshold value, determining that the reliability is normal.
6. The method for condition monitoring of an offshore wind farm infrastructure according to claim 1, wherein the process of calculating the interference index comprises: Extracting an interference characteristic characterization value and a preset interference characteristic characterization threshold value; Calculating a difference value between a preset interference characteristic characterization threshold value and an interference characteristic characterization value; The difference is determined as an interference index.
7. The method for condition monitoring of an offshore wind farm infrastructure according to claim 1, wherein the process of determining the cause of the reliability anomaly based on the disturbance index comprises: if the interference index is less than or equal to a predetermined interference index threshold, determining that the quarternary water change and the offshore sediment accumulation cause the monitoring equipment to monitor slight fluctuation; if the disturbance indexes are larger than the preset disturbance index threshold value, the condition that seawater pollution and large stormy waves cause billows of sediment on the sea bottom is determined, and a large amount of suspended particles are attached to the surface of the probe.
8. The method of state monitoring of an offshore wind farm infrastructure according to claim 7, wherein the process of matching the corresponding processing strategy based on the cause of the reliability anomaly comprises: if the reason is that the monitoring equipment monitors slight fluctuation due to the change of the quaternary water area and the sediment accumulation on the coast, determining the adjustment amplitude of the weight ratio of the first health factor to the second health factor; If the cause is sea water pollution, large stormy waves cause sediment billows on the sea bottom and a large amount of suspended particles are attached to the surface of the probe, determining the height adjustment amplitude of the predetermined health characteristic representation threshold value.
9. The method of claim 8, wherein the determining the predetermined health characterization threshold is performed by determining a rise magnitude of the predetermined health characterization threshold, wherein the rise magnitude of the predetermined health characterization threshold is positively correlated with the interference index.
10. The method of claim 8, wherein the determining the adjustment magnitude of the weight ratio of the first health factor to the second health factor is related to an interference index.

Description

State monitoring method for offshore wind power foundation structure Technical Field The invention relates to the technical field of offshore wind power foundation structure monitoring, in particular to a state monitoring method of an offshore wind power foundation structure. Background The offshore wind power foundation structure is long-term in a complex marine environment with high salt fog, strong corrosion and multiple suspended matters, and the structural integrity of the offshore wind power foundation structure is directly related to the safe operation and the service life of the wind turbine generator. The existing monitoring system is generally focused on parameter acquisition and fusion evaluation of a structure, and lacks a recognition and correction mechanism for the influence of the marine environment where the monitoring equipment is located on the measurement precision, so that the system has the remarkable defects in practical application that on one hand, ultrasonic propagation time is influenced by sound velocity deviation caused by sea water salinity change, eddy current induced voltage is interfered by probe attachment caused by sea water turbidity rise, environmental factors and structural damage signals are mutually coupled, and the distortion of a monitoring result is caused, on the other hand, the existing method lacks a mechanism for recognizing and correcting the measurement deviation caused by environmental disturbance, whether the structure is abnormal or the monitoring equipment is subjected to misjudgment caused by the environmental influence is not distinguished, and the urgent requirements of accurate sensing and long-term stable monitoring of the structural state of offshore wind power engineering are difficult to meet due to high misinformation rate and leakage rate. Chinese patent publication No. CN119825653A discloses a safety monitoring system of an offshore wind power foundation structure, which comprises a base monitoring module, a cable monitoring module, an environment monitoring module, a data transmission module, a summarizing module and a data preprocessing module, wherein the base monitoring module comprises a level meter, a stress sensor, a pressure sensor, a monitoring base inclination, stress change, water pressure change and the like, the cable monitoring module is used for monitoring the state of a cable, the environment monitoring module comprises sea wave frequency monitoring, water surface foreign matter monitoring and climate monitoring, the data transmission module comprises a cloud unit, a submarine optical fiber unit and a data storage unit, supports microwave communication, satellite communication and optical fiber communication, data can be transmitted timely or abnormally triggered and instantly, the summarizing module is used for preprocessing data, the data cleaning and the data integration are carried out, the parameter prediction comprises the construction of a judging system based on national standards and expert scoring, the operation state prediction of the scoring model is constructed by using an entropy weight method, and the life prediction of a three-dimensional prediction model is constructed by combining corrosion degradation, fatigue degradation and impact load data. Disclosure of Invention Therefore, the invention provides a state monitoring method of an offshore wind power foundation structure, which is used for solving the problems that in the prior art, when an initial stage of forming a scouring pit of the offshore wind power foundation structure is not considered, the salinity layering and turbidity sudden rise of a water body are caused by local scouring, a monitoring signal is interfered by the environment and drifts, but the offshore wind power foundation structure is not really damaged, the water area environment change caused by scouring is judged as the abnormal state of the offshore wind power foundation structure by mistake, the false alarm rate is increased, the maintenance decision is distorted according to the distortion, the engineering intervention window period of the initial stage of scouring is missed, the emptying instability of the offshore wind power foundation structure is caused, and the safety state of the offshore wind power foundation structure in the scouring stage is difficult to be accurately perceived, and the monitoring reliability is low. In order to achieve the above object, the present invention provides a method for monitoring the state of an offshore wind power infrastructure, comprising: Collecting health characteristic information of a target offshore wind power foundation structure in a historical period; Analyzing a health feature characterization value based on the health feature information; Judging whether the stability of the target offshore wind power foundation structure meets the standard or not based on the comparison result of the health characteristic representation value and a pre