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CN-122022446-A - Safety risk assessment system and method for newly-increased photovoltaic module of dam slope of hydropower station

CN122022446ACN 122022446 ACN122022446 ACN 122022446ACN-122022446-A

Abstract

The invention relates to the technical field of safety evaluation of hydropower station dam face photovoltaic engineering, in particular to a safety risk evaluation system and method for a newly added photovoltaic module of a dam slope of a hydropower station dam and a computer storage medium, and aims to solve the potential safety hazard problem of additional installation of the photovoltaic module on the dam slope. The system comprises a control unit, a three-level detection unit, a trigger control unit and a risk judging unit which are connected with the control unit, wherein each unit transmits data in real time through an industrial Ethernet. The primary detection unit is used for movably detecting the compliance of the dam slope foundation, the secondary detection unit is used for verifying the suitability of the support and the dam face, the tertiary detection unit is used for monitoring the safety of the operation period, the trigger control unit is used for determining whether to start secondary detection according to the result of the previous stage, and the risk judging unit is used for outputting the risk level and generating a report. The method adopts grading detection, wherein the first grade reaches the standard and starts the second grade, the second grade reaches the standard and starts the third grade, and if any grade does not reach the standard, the corresponding risk is terminated and reported. The storage medium stores a computer program to perform the evaluation method. The dam slope photovoltaic module safety evaluation system realizes automation and accuracy of dam slope photovoltaic module safety evaluation, and ensures safe operation of a dam and a photovoltaic system.

Inventors

  • DENG YAOXI
  • KE JIAN
  • LU YULIN
  • Fu Fuquan

Assignees

  • 国能大渡河新能源投资有限公司

Dates

Publication Date
20260512
Application Date
20251212

Claims (10)

  1. 1. The system is characterized by comprising a control unit, a primary detection unit, a secondary detection unit, a tertiary detection unit, a trigger control unit and a risk judgment unit, wherein the primary detection unit, the secondary detection unit, the tertiary detection unit, the trigger control unit and the risk judgment unit are connected with the control unit; the first-level detection unit is a field mobile detection unit and is used for detecting compliance of dam slope foundation conditions; The secondary detection unit is started after receiving the primary qualified signal sent by the trigger control unit and is used for detecting the suitability of the photovoltaic module bracket and the dam surface; The three-level detection unit is started after receiving the second-level qualified signal sent by the trigger control unit and is used for comprehensive safety detection of the photovoltaic module in the operation period; the triggering control unit is a PLC for presetting a three-level detection threshold value and is used for receiving the data of the previous-level detection unit and judging whether the next-level detection unit is triggered to start, and if the data does not meet the threshold value, a risk grade signal is sent to the risk judging unit; The risk judging unit is used for outputting the risk grade, generating an evaluation report and inquiring historical detection data.
  2. 2. The system for evaluating the safety risk of the newly-increased photovoltaic module of the dam slope of the hydropower station according to claim 1, wherein the primary detection unit comprises a structure type identification module, an anti-skid stable detection module, a surface state detection module and a data output interface; the structure type identification module comprises a high-definition industrial camera and a laser range finder, and is used for shooting the surface texture of the dam slope, measuring the slope and matching the structure type of the dam slope; the anti-skidding stability detection module comprises an industrial control computer and slope stability analysis software, supports the input of self-defined soil strip dividing quantity and physical parameters of a rock-soil body, and calculates the original anti-skidding stability coefficient of the dam body; the surface state detection module comprises a camera unmanned plane, a handheld ultrasonic thickness gauge, a water seepage flow gauge and a laser level gauge and is used for identifying dam face cracks, rechecking crack depths, collecting water seepage data and detecting dam face flatness.
  3. 3. The system for evaluating the safety risk of the newly added photovoltaic module of the dam slope of the hydropower station according to claim 2, wherein the secondary detection unit consists of a field acquisition subunit and a remote calculation subunit and comprises a load calculation module, a fixed mode detection module, a drainage influence simulation module and an extreme load resisting module; the load calculation module is arranged at the top of the support connecting rod through a tension sensor, measures the single-point load of the support dead weight and the photovoltaic module dead weight, substitutes load data acquired on site into a dam face rock-soil body mechanical model through a cloud server, and calculates the ratio of the load to the allowable bearing capacity of the dam face; The fixed mode detection module detects the aperture of the connecting rod after insertion through a drilling calliper, and scans the internal structure of the dam body through a geological radar to judge whether the connecting rod touches the impermeable layer and the stressed bar; The drainage influence simulation module acquires natural rainfall and drainage flow rate data of the dam slope through a rain gauge and a flow rate meter, establishes a hydraulic model and simulates the rainwater passing rate after the bracket array is arranged; And the extreme load resisting module is used for acquiring the displacement of the support connecting node through a displacement sensor under the condition of simulating a load of 2.5kN/m < 2 >.
  4. 4. The system for evaluating the safety risk of a newly added photovoltaic module of a dam slope of a hydropower station according to claim 3, wherein the three-level detection unit comprises a stress-strain monitoring module, a temperature influence detection module, a connection state monitoring module and a data storage module; the stress strain monitoring module is used for distributing vibrating wire type stress sensors in the range of 1m at the fixed point and the periphery of the bracket, uploading data to the cloud end through the data acquisition instrument, and monitoring the maximum stress value in real time through software; the temperature influence detection module synchronously collects temperature data on the surface layer of the back plate and the dam surface of the photovoltaic module to calculate the temperature difference; The connecting state monitoring module detects the looseness of the connecting rod through a torque wrench, monitors the corrosion, fracture and new crack condition of a dam surface contact point of the connecting rod in real time through a high-definition camera, and automatically alarms if abnormal image recognition software is adopted; and the storage module stores local data through the SD card and the Arin cloud OSS.
  5. 5. The system for evaluating the safety risk of the newly-increased photovoltaic module of the dam slope of the hydropower station according to claim 4, wherein the trigger control unit comprises a PLC, a buzzer and LED indicator lamp and a power switch; After receiving the data of the previous stage detection unit, the PLC judges whether a threshold value is met or not through an internal logic circuit, if yes, a next stage detection unit power switch is triggered, if not, a risk grade signal is sent to a risk judging unit through an RS485 bus, and meanwhile, a subsequent detection unit power switch is cut off; the trigger control unit also has the functions of power failure and communication interruption alarm, and prompts the failure through the buzzer and the LED indicator lamp.
  6. 6. The system for evaluating the safety risk of the newly added photovoltaic module of the dam slope of the hydropower station according to claim 5, wherein an industrial touch screen of the risk judging unit is shared with the trigger control unit and is used for displaying the risk level in real time, wherein the risk level is displayed in a red font when the primary detection is not met, an orange font is displayed along with the alarm of the buzzer, the secondary risk is displayed when the secondary detection is not met, the tertiary risk is displayed when the tertiary detection is not met, the yellow font is displayed, and the risk is displayed in a green font when the tertiary detection is met; and the risk judging unit automatically generates an evaluation report containing detection parameters, a threshold value, a judging result and detection original data of each module according to the judging result.
  7. 7. The method for evaluating the safety risk of a newly added photovoltaic module of a dam slope of a hydroelectric power station according to claim 1, wherein the system operation according to any one of claims 1 to 6 comprises: the method comprises the steps of S1, starting a primary detection unit to detect compliance of dam slope foundation conditions, if a detection result meets the requirements that the dam slope structure type is matched with a preset support type, the original anti-slip stability coefficient of a dam body is more than or equal to 1.25, the length of a single crack of the dam face is less than 5m, the depth is less than 0.3m, the water seepage flow is less than 0.1L/min, the surface layer peeling area is less than 1m & lt 2 & gt, and the flatness error is less than or equal to 5cm, sending a primary qualified signal to a trigger control unit, and entering a step S2; S2, starting a secondary detection unit after receiving a 'primary qualified' signal by a trigger control unit, and detecting suitability of a photovoltaic bracket and a dam surface, wherein if a detection result meets 80% of allowable bearing capacity of the single-point load of the bracket is less than or equal to the dam surface, the aperture of a connecting rod after insertion is less than or equal to 50mm, the insertion depth is less than or equal to 300mm, the connecting rod is not contacted with a dam body impermeable layer/stressed rib, the rainwater passing rate is more than or equal to 90%, and the displacement of a bracket connecting node under the conditions of 0.2g earthquake acceleration and 2.5kN/m < 2 > of high wind load is less than or equal to 5mm, then sending a 'secondary qualified' signal to the trigger control unit, and entering a step S3; And S3, triggering a control unit to receive a second-grade qualified signal, then starting a third-grade detection unit to perform comprehensive safety detection in the operation period, outputting a 'no risk' and generating a quaternary evaluation report by a risk judging unit if the detection result meets 70% of the maximum stress of the dam surface which is less than or equal to the design strength of dam materials, the temperature of a back plate of the assembly is less than or equal to 65 ℃, the temperature rise value of the dam surface is less than or equal to 3 ℃, the corresponding displacement of the looseness of a connecting rod is less than or equal to 2mm, no rust is broken, no new crack with the length of more than or equal to 0.5m is generated, and otherwise outputting a 'third-grade risk' and prompting rectification by the risk judging unit.
  8. 8. The method for evaluating the safety risk of a newly added photovoltaic module on a dam slope of a hydropower station according to claim 7, wherein in step S1, the specific detection process of the primary detection unit comprises: S1a, moving a detection vehicle to a dam slope detection area, starting a structure type identification module, shooting the dam slope surface by a high-definition industrial camera, wherein the shooting number is more than or equal to 5 so as to cover the detection area, measuring 1 slope gradient point every 50m by a laser range finder, comparing a dam body completion drawing database in a local SSD hard disk by software, outputting the dam slope structure type and judging whether the dam slope structure type is matched with a preset bracket type; s1b, starting an anti-slip stability detection module, inputting parameters of a rock-soil body of a dam body, dividing 20 soil strips by software by default, and calculating an original anti-slip stability coefficient of the dam body; S1c, starting a surface state detection module, wherein an unmanned aerial vehicle patrols and examines according to a preset route with a route distance of 10m along the longitudinal direction of a dam slope and automatically identifies dam surface cracks, measuring 3 points at each crack by using an ultrasonic thickness gauge manually to recheck depth, continuously collecting each water seepage point of a water seepage flow meter for 5min to obtain an average value, and recording maximum error of the flatness of the dam surface by using a laser level meter for 3 detection points every 10m <2 >; And S1d, if the detection results of the S1a-S1c all meet the threshold value, the detection vehicle sends a first-grade qualified signal to the trigger control unit through an RJ45 network port, and otherwise, the first-grade risk is triggered.
  9. 9. The method for evaluating the safety risk level of a dam slope of a photovoltaic module according to claim 8, wherein in step S2, the specific detection process of the secondary detection unit comprises: S2a, triggering a control unit to send a starting instruction to a field acquisition subunit, continuously acquiring 3 single-point loads for taking an average value by arranging a tension sensor at the top of a bracket connecting rod, uploading data to a remote calculation subunit, and calculating the ratio of the load to the allowable bearing capacity of a dam face by ANSYSMECHANICAL2023R2 software; S2b, measuring 2 points by each connecting rod of the drilling calliper to detect the aperture after insertion, scanning the dam body by using the geological radar to generate a section view, and judging the insertion depth of the connecting rod and whether the connecting rod touches an impermeable layer/a stressed rib; S2c, collecting rainfall intensity of 50 years in the local area by using a rain gauge, measuring natural drainage FLOW rate of a dam slope by using a FLOW meter, calling FLOW-3D software by using a remote calculation subunit, inputting arrangement parameters of a bracket of 3180mm transversely and 2200mm longitudinally to simulate the passing rate of rainwater, wherein the roughness of the slope is 0.025; S2d, loading 0.2g of earthquake acceleration on the vibrating table for 30 seconds, recording the displacement of a connecting node of the support scale model by the displacement sensor, and substituting 2.5kN/m < 2 > of high wind load data obtained by a wind tunnel test to verify whether the displacement meets a threshold value; and S2e, if the detection results of the S2a-S2d all meet the threshold value, the remote computing subunit sends a secondary qualified signal to the trigger control unit, and otherwise, the secondary risk is triggered.
  10. 10. The method for evaluating the safety risk level of a dam slope of a photovoltaic module according to claim 9, wherein in step S3, the specific detection process of the three-stage detection unit comprises: s3a, uploading data per hour by a vibrating wire type stress sensor of the stress-strain monitoring module through a data acquisition instrument, and monitoring whether the maximum stress value of the dam surface is less than or equal to 70% of the designed strength of the dam material in real time by software; S3b, synchronously collecting the temperatures of the back plate and the surface layer of the dam face of the assembly by a PT100 sensor of the temperature influence detection module, and calculating the temperature rise value of the dam face when the temperature of the back plate of the assembly is less than or equal to 65 ℃; s3c, detecting the looseness of the connecting rod by using a torque wrench, and comparing with 50N during installation M initial torque, looseness= (initial torque-actual measurement torque)/initial torque multiplied by 100%, a high-definition camera monitors corrosion and fracture conditions of a connecting rod in real time, and image recognition software automatically recognizes new cracks and alarms when the length is more than or equal to 0.5 m; and S3d, outputting 'no risk' and generating a quarter report containing a sensor curve and the unmanned aerial vehicle photo by the risk judging unit if the detection results of the S3a-S3c all meet the threshold value, and triggering 'three-level risk' if not.

Description

Safety risk assessment system and method for newly-increased photovoltaic module of dam slope of hydropower station Technical Field The invention relates to the technical field of safety evaluation of hydropower station dam face photovoltaic engineering, in particular to a safety risk evaluation system and a safety risk evaluation method for a newly-increased photovoltaic module of a hydropower station dam slope based on progressive detection, which are suitable for safety risk identification and grade judgment in installation and operation stages of various hydropower station dam downstream slope photovoltaic modules such as a slurry stone dam, a dry stone dam and a concrete stone dam. Background The traditional photovoltaic project has the problems of wide occupation range, complex land type, harsh administrative approval process (such as strict limitation of photovoltaic land for photovoltaic power station engineering project land index (report draft)) and the like. Therefore, the dam surface photovoltaic project of the hydropower station is generated, the existing land resource of the downstream sunny slope surface (such as a south dam surface, refer to fig. 3) of the dam is utilized, the water-light complementation is realized by depending on the existing transmission line of the hydropower station, the additional land occupation is not needed, and the dam surface photovoltaic project becomes an important demonstration direction of distributed photovoltaic. However, on the premise that the original safety performance of the dam is guaranteed in the dam face photovoltaic project, the existing dam face photovoltaic safety evaluation technology has the remarkable defects that: 1. The evaluation logic is not systematic, and the prior art is mostly aimed at a single link (such as only detecting the anti-slip stability of a dam slope foundation or only verifying the operation load of a photovoltaic module), and lacks a full-flow layered evaluation system from 'basic conditions before installation, bracket adaptation in installation and long-term influence of operation period', which is easy to cause risk missed judgment (such as neglecting the damage of a bracket fixing mode to a dam structure) or excessive detection (such as that basic conditions are not up to standard and operation period monitoring is still carried out); 2. The repeated redundancy of detection parameters is that parameter crossing exists in different evaluation links (such as repeated detection of the anti-slip stability coefficient of a dam slope but no distinction is made between the original dam body and the post-superimposed photovoltaic load), so that the evaluation efficiency is low and the cost is high; 3. The risk positioning is inaccurate, the existing evaluation can only judge safety/unsafe, the risk source (such as basic defect, bracket adaptation problem or running abrasion) can not be positioned, and the targeted establishment of the correction measures is inconvenient. Although researches are carried out on the photovoltaic safety identification of the dam face (such as calculating the stability of the anti-skidding of the dam slope by adopting a Spencer method) aiming at single hydropower stations such as monkey rocks and waterfall ditches, a generalized standardized and graded evaluation system and method are not formed, and the safety evaluation requirement of large-scale development of the dam face of the river basin-level power station is difficult to meet. Therefore, a scheme for evaluating the safety risk level of the dam slope of the photovoltaic module, which is hierarchical, unique in parameter and accurate in risk positioning, is needed to fill the blank of the prior art. Disclosure of Invention Aiming at the problems of lack of system layering logic, repeated parameters and fuzzy risk positioning in the existing dam surface photovoltaic safety evaluation, the invention aims to provide a system and a method for evaluating the safety risk level of a hydropower station dam slope installation photovoltaic module, and the system and the method realize full-flow safety evaluation from dam slope foundation conditions to photovoltaic operation period by three-level progressive detection with non-adjustable time sequence and non-repeated parameters, accurately identify risk level and source, reduce evaluation cost and improve evaluation efficiency on the premise of ensuring dam safety, and support the compliance and landing of dam surface photovoltaic projects. The technical scheme adopted by the invention is as follows: The safety risk assessment system for the newly-added photovoltaic module of the dam slope of the hydropower station comprises a control unit, a primary detection unit, a secondary detection unit, a tertiary detection unit, a trigger control unit and a risk judgment unit, wherein the primary detection unit, the secondary detection unit, the tertiary detection unit, the trigger control unit and the risk ju