CN106779098A - It is applied to the lightning rod security performance comprehensive estimation method in wind area - Google Patents

It is applied to the lightning rod security performance comprehensive estimation method in wind area Download PDF

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Publication number
CN106779098A
CN106779098A CN201611045770.3A CN201611045770A CN106779098A CN 106779098 A CN106779098 A CN 106779098A CN 201611045770 A CN201611045770 A CN 201611045770A CN 106779098 A CN106779098 A CN 106779098A
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points
lightning rod
state
deduction
bolt
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Inventor
董新胜
张东
张小军
王建
杨洋
依力扎提·吐尔汗
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Xinjiang Electric Power Co Ltd
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Xinjiang Electric Power Co Ltd
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Priority to CN201611045770.3A priority Critical patent/CN106779098A/en
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    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06QDATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTING PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTING PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q10/00Administration; Management
    • G06Q10/20Product repair or maintenance administration
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06QDATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTING PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTING PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q10/00Administration; Management
    • G06Q10/06Resources, workflows, human or project management, e.g. organising, planning, scheduling or allocating time, human or machine resources; Enterprise planning; Organisational models
    • G06Q10/063Operations research or analysis
    • G06Q10/0639Performance analysis
    • G06Q10/06393Score-carding, benchmarking or key performance indicator [KPI] analysis
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06QDATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTING PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTING PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
    • G06Q50/06Electricity, gas or water supply
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications

Abstract

It is a kind of lightning rod security performance comprehensive estimation method the present invention relates to the operation of wind area power transmission and transforming equipment and administrative skill field, the first step determines lightning rod safety evaluation state component;Second step, crosses to measure and calculate and lightning rod safety evaluation is classified;3rd step, degradation level is set according to the degradation of state component;4th step, according to the corresponding basic deduction of points value of degradation level setting;5th step, state evaluation is carried out according to the weighted value and basic deduction of points value of second step and the 4th step to lightning rod;6th step, deducts points and adds up to according to the individual event of lightning rod quantity of state deduction of points to form state evaluation and report.The present invention is by the periodical evaluation to wind area Lightning-Rod Protection Disign In Substations safe running performance, the state quantity data gathered about influence lightning rod safe operation carries out periodic evaluation, lightning rod working condition can effectively be understood, ensure the structure safety of framework lightning rod, scent a hidden danger defect in time, accident prevention can effectively ensure the normal operation of transformer station in possible trouble.

Description

It is applied to the lightning rod security performance comprehensive estimation method in wind area
Technical field
It is a kind of lightning rod security for being applied to wind area the present invention relates to Lightning-Rod Protection Disign In Substations safety assessment technique field Can comprehensive estimation method.
Background technology
At present, tubular type framework lightning rod is widely used in high voltage substation, and it belongs to towering cantilever member, with long thin , shell smaller than big, rigidity be thin, from heavy and light the characteristics of, be typical wind sensitive structure, easily there is charming appearance and behaviour under wind action Vibration, the probability that the transformer substation framework lightning rod generation wind under this specific harsh weather ruins accident will be greatly increased.Closely Phase, certain 750 kilovolts become No. 1 two wires portal frame of lightning rod in 330 kilovolts of battery limits and, because high wind dust and sand weather falls, cause 330 II section of A phases pipe of kilovolt is female impaired, 330 kilovolt of II female decompression;Become 750 kilovolts of inlet wire side portal frame west sides of No. 2 main transformers in certain 750kV Framework top lightning rod drops to portal frame horizontal gird middle part under wind-force effect, causes and framework top junction flange Connecting bolt is broken.According to foregoing lightning rod accident, the framework lightning rod toppled over is the steel pipe type structure of rigid flange connection, bottom Seat 36 bolt complete ruptures of connection come off, through onsite lookup, collect after find, at least 11 bolt sections exist and exceed 80% corrosion vestige, illustrates that this part bolt fails substantially before failure generation.Above accident causes large-area power-cuts, Cause serious financial consequences.Transformer station can normal work be related to Regional Energy input, directly affect the normal of landing pit Production, causes transmission line of electricity to interrupt once lightning rod occur and collapsing, and will bring serious social negative effect and economic loss.
The content of the invention
The invention provides the lightning rod security performance comprehensive estimation method that a kind of basis is applied to wind area, overcome existing Technology cannot be effectively assessed lightning rod running status, there is lightning rod and easily appearance is continued to run with hidden danger defect seriously The problem of accident.
The technical scheme is that realized by following measures:A kind of lightning rod security performance for being applied to wind area Comprehensive estimation method is comprised the following steps:
The first step:Determine lightning rod safety evaluation state component according to the abnormal conditions that existing lightning rod is present, including Lightning rod gradient, lightning-arrest shank top maximum defluxion, bolt missing and loosening, bolt corrosion, bolt performance detection and lightning rod The body of rod resonates, afterwards into second step;
Second step:According to state component to the influence degree of lightning rod safe operation and by measurement and calculating to lightning rod Safety evaluation is classified, including important state component and general state component, the corresponding weight difference of general state component It is weight 1, weight 2, its coefficient is 1,2, the corresponding weight of important state component is respectively weight 3, weight 4, its coefficient is 3, 4, afterwards into the 3rd step;
3rd step:Degradation setting degradation level according to state component, degradation level includes I grades, II grade, III level With IV grades, afterwards into the 4th step;
4th step:According to the corresponding basic deduction of points value of degradation level setting, described degradation level I grades, II grade, III level and IV grades of corresponding deduction of points value is respectively 2 points, 4 points, 8 points and 10 points, afterwards into the 5th step;
5th step:Weighted value and basic deduction of points value according to second step and the 4th step carry out state evaluation, root to lightning rod The security performance of lightning rod is classified according to the value that should deduct points of state evaluation result:Normal condition, attention state, abnormality And severe conditions, afterwards into the 6th step;
6th step:Deducted points and added up to deduction of points to form state evaluation according to the individual event of lightning rod quantity of state to report, and list each shape The deduction of points reason of state component, when lightning rod is determined as attention state, is directly entered defect processing program, for being determined as abnormal shape The lightning rod of state and severe conditions takes corresponding Strategies of Maintenance or changes lightning rod.
Here is the further optimization and/or improvements to foregoing invention technical scheme:
It is above-mentioned in second step, to lightning rod gradient, lightning-arrest shank top maximum defluxion, bolt missing and loosen, bolt The measurement of corrosion, bolt performance detection and the lightning rod body of rod resonance includes following methods:
(1) measurement lightning rod gradient using measuring apparatus to the gradient of more than lightning rod 50m and inclining for below 50m Gradient is measured;
(2) lightning-arrest shank top maximum defluxion is measured, according to deflection deformation index using equipment to lattice and steel-tube construction Measure;
(3) bolt of lightning rod flange connections is checked using manual observation method, the bolt scope of examination includes spiral shell The corrosion of bolt, the loosening situation of bolt;
(4) bolt of lightning rod flange connections is detected using equipment, the detection content of bolt includes ultrasonic wave Detection and hardness sampling observation;
(5) measurement of lightning rod body of rod resonance includes counting the resonance number of times under lightning rod intrinsic frequency.
It is it is determined that under wind speed, according to the annual wind for occurring that resonance number of times under above-mentioned lightning rod intrinsic frequency carries out statistics Slowdown monitoring data, carry out the statistics of the wind speed frequency, for the calculating side that the resonance number of times of lightning rod intrinsic frequency is counted Method is as follows:
For circular section hollow cylinder, vibration critical wind speed is expressed as:
In formula, constant λnIt is natural frequency of vibration parameter, according to vibration order and end restraint condition value, E is Young's modulus, ρ is density, and L is length, the radius of gyrationD is cylinder diameter;
For circular section hollow steel pipe, Young's modulus and density are usually taken to be 2.06 × 1011N/m2With 7.85 × 103kg/ m3, thus, above formula can be further simplified as again:
λ=L/r represents the slenderness ratio of steel tube member bar in formula.
It is above-mentioned in the 5th step, it is 4 to set the lightning rod gradient weight coefficient, when below 50m gradients are less than 10 ‰, more than 50m gradient are less than 5 ‰, belong to normal dip state, and multiply I grades of state degree according to weight coefficient 4 deducts points substantially Value 2, this should deduct points 8 points, be judged as " normal condition ", can continue to run with;If below 50m gradients be 10 ‰ to 15 ‰, More than 50m gradients are 5 ‰ to 10 ‰, are deterioration beginning state, and state degree deduction of points value 4 substantially is multiplied by weight coefficient 4, this Deduction of points value is 16 points, is judged as " attention state ", should strengthen monitoring;If below 50m gradients be 15 ‰ to 20 ‰, 50m with Upper gradient is 10 ‰ to 15 ‰, shows that lightning rod heeling condition continues to deteriorate, according to weight and basic deduction of points value product, this 32 points of deduction of points, is judged as " abnormality ", should be processed in proper moment;When below 50m gradients >=20 ‰, 50m with During upper gradient >=15 ‰, 40 points of this deduction of points value is judged as " severe conditions ", shows that lightning rod has occurred to incline than more serious Tiltedly, should the treatment of arrangement in time;
It is 4 to set lightning rod amount of deflection weight coefficient, as amount of deflection lattice >=H/200;Steel-tube construction >=H/35, for deterioration is opened Beginning state, basic deduction of points value 4 is multiplied by weight coefficient 4, and this deduction of points value is 16 points, is judged as " attention state ";Lattice >=4H/ 125;Steel-tube construction >=2H/125, shows that lightning rod amount of deflection state continues to deteriorate, according to weight and basic deduction of points value product, this 32 points of deduction of points, is judged as " abnormality ";Lattice >=H/100;Steel-tube construction >=H/70,40 points of this deduction of points value, is judged as " severe conditions ", show that lightning rod has occurred, than more serious deformation, to process in time, and wherein H is that truss column calculates point height;
The quantity of state weight coefficient for setting lightning rod bolt missing or loosening is 4, when lacking a small amount of bolt, bolt looseness 2% to 10%, it is deterioration beginning state, multiply basic deduction of points value 4 by weight coefficient 4, this deduction of points value is 16 points, is judged as " note Meaning state ";Lack more bolt, bolt looseness 10% to 15% shows that lightning rod state continues to deteriorate, according to weight and state Degree deduction of points value product substantially, this deducts points 32 points, is judged as " abnormality ";Lack a large amount of bolts, bolt looseness 15% with On, 40 points of this deduction of points value is judged as " severe conditions ", shows that lightning rod has occurred than more serious state deteriorating, should be timely Treatment;
It is 4 to set lightning rod bolt corrosion quantity of state weight coefficient, if zinc coat fails, there is slight corrosion, then be deterioration Beginning state, basic deduction of points value 4 is multiplied by weight coefficient 4, and this deduction of points value is 16 points, is judged as " attention state ";If corrosion compared with Seriously, more bolt and gusset plate are peeled off, and show that lightning rod state continues to deteriorate, according to weight and state degree deduction of points value substantially Product, this deducts points 32 points, is judged as " abnormality ";If lacking a large amount of bolts, during bolt looseness more than 15%, this deduction of points 40 points of value, is judged as " severe conditions ", shows that lightning rod bolt has occurred, than more serious state deteriorating, to process in time;
It is 4 to set lightning rod bolt performance detection quantity of state weight coefficient, if hardness declines 10% to 20%, for deterioration is opened Beginning state, basic deduction of points value 4 is multiplied by weight coefficient 4, and this deduction of points value is 16 points, is judged as " attention state ";If hardness declines 20% to 40%, show that lightning rod state continues to deteriorate, according to weight and state degree deduction of points value product substantially, this deduction of points 32 Point, it is judged as " abnormality ";If hardness declines more than 40%, 40 points of this deduction of points value is judged as " severe conditions ", shows Lightning rod bolt has occurred, than more serious state deteriorating, to process in time;
It is 4 to set lightning rod bolt ultrasound examination quantity of state weight coefficient, if bolt occur crack defect account for 10% with Under, it is deterioration beginning state, multiply basic deduction of points value 4 by weight coefficient 4, this deduction of points value is 16 points, is judged as " attention state "; If crack defect occurs in bolt accounts for 10% to 15%, show that lightning rod state continues to deteriorate, it is basic with state degree according to weight Deduction of points value product, this deducts points 32 points, is judged as " abnormality ";If there is crack defect in bolt when accounting for more than 15%, this 40 points of deduction of points value, is judged as " severe conditions ", shows that lightning rod bolt has occurred, than more serious state deteriorating, to locate in time Reason;
It is 3 to set lightning rod body of rod resonance weight coefficient, if resonance number of times statistics occurs is less than 2%, belongs to normal condition, According to weight coefficient 3 and the basic deduction of points value 2 of I grades of state degree, this should deduct points 6 points, be judged as " normal condition ", can continue Operation;It is deterioration beginning state if generation resonance number of times statistics is accounted for more than 2% to 5%, state degree base is multiplied by weight coefficient 3 This deduction of points value 4, this deduction of points value is 12 points, by table 3, is judged as " attention state ", should strengthen monitoring;The number of times if generation is resonated Statistics is accounted for when more than 5% to 10%, shows that lightning rod state continues to deteriorate, according to weight and basic deduction of points value product, this button Divide 24 points, be judged as " abnormality ", should be processed in proper moment;If generation resonance number of times statistics accounts for more than 10% When, 40 points of this deduction of points value is judged as " severe conditions ", shows that lightning rod has occurred more resonance number of times, to lightning rod Serious harm will be produced, should the treatment of arrangement in time.
By the periodical evaluation to wind area Lightning-Rod Protection Disign In Substations safe running performance, collection is relevant to influence lightning rod to the present invention The state quantity data of safe operation carries out periodic evaluation, can effectively understand lightning rod working condition, it is ensured that framework lightning rod Structure safety, scent a hidden danger defect in time, and accident prevention can effectively ensure the normal operation of transformer station in possible trouble.
Brief description of the drawings
Accompanying drawing 1 is flow chart of the invention.
Specific embodiment
The present invention is not limited by following embodiments, can technology according to the present invention scheme and actual conditions determine specifically Implementation method.
As shown in accompanying drawing 1, table 1, table 2, table 3 and table 4, the lightning rod security performance comprehensive estimation method bag in wind area is applied to Include following steps:
The first step:Determine lightning rod safety evaluation state component according to the abnormal conditions that existing lightning rod is present, including Lightning rod gradient, lightning-arrest shank top maximum defluxion, bolt missing and loosening, bolt corrosion, bolt performance detection and lightning rod The body of rod resonates, afterwards into second step;
Second step:According to state component to the influence degree of lightning rod safe operation and by measurement and calculating to lightning rod Safety evaluation is classified, including important state component and general state component, the corresponding weight difference of general state component It is weight 1, weight 2, its coefficient is 1,2, the corresponding weight of important state component is respectively weight 3, weight 4, its coefficient is 3, 4, afterwards into the 3rd step;
3rd step:Degradation setting degradation level according to state component, degradation level includes I grades, II grade, III level With IV grades, afterwards into the 4th step;
4th step:According to the corresponding basic deduction of points value of degradation level setting, described degradation level I grades, II grade, III level and IV grades of corresponding deduction of points value is respectively 2 points, 4 points, 8 points and 10 points, afterwards into the 5th step;
5th step:Weighted value and basic deduction of points value according to second step and the 4th step carry out state evaluation, root to lightning rod The security performance of lightning rod is classified according to the value that should deduct points of state evaluation result:Normal condition, attention state, abnormality And severe conditions, afterwards into the 6th step;
6th step:Deducted points and added up to deduction of points to form state evaluation according to the individual event of lightning rod quantity of state to report, and list each shape The deduction of points reason of state component, when lightning rod is determined as attention state, is directly entered defect processing program, for being determined as abnormal shape The lightning rod of state and severe conditions takes corresponding Strategies of Maintenance or changes lightning rod.
Further excellent can be made to the above-mentioned lightning rod security performance comprehensive estimation method for being applied to wind area according to actual needs Change or/and improve:
It is maximum to lightning rod gradient, lightning-arrest shank top in second step as shown in accompanying drawing 1, table 1, table 2, table 3 and table 4 The measurement of amount of deflection, bolt missing and the resonance of loosening, bolt corrosion, bolt performance detection and the lightning rod body of rod includes following methods:
(1) measurement lightning rod gradient using measuring apparatus to the gradient of more than lightning rod 50m and inclining for below 50m Gradient is measured;
(2) lightning-arrest shank top maximum defluxion is measured, according to deflection deformation index using equipment to lattice and steel-tube construction Measure;
(3) bolt of lightning rod flange connections is checked using manual observation method, the bolt scope of examination includes spiral shell The corrosion of bolt, the loosening situation of bolt;
(4) bolt of lightning rod flange connections is detected using equipment, the detection content of bolt includes ultrasonic wave Detection and hardness sampling observation;
(5) measurement of lightning rod body of rod resonance includes counting the resonance number of times under lightning rod intrinsic frequency.
As shown in accompanying drawing 1, table 1, table 2, table 3 and table 4, it is true that the resonance number of times under lightning rod intrinsic frequency carries out statistics Determine under wind speed, according to the annual air monitoring data for occurring, the statistics of the wind speed frequency is carried out, for the intrinsic frequency of lightning rod The computational methods of the resonance number of times statistics of rate are as follows:
For circular section hollow cylinder, vibration critical wind speed is expressed as:
In formula, constant λnIt is natural frequency of vibration parameter, according to vibration order and end restraint condition value, E is Young's modulus, ρ is density, and L is length, the radius of gyrationD is cylinder diameter;
For circular section hollow steel pipe, Young's modulus and density are usually taken to be 2.06 × 1011N/m2With 7.85 × 103kg/ m3, thus, above formula can be further simplified as again:
λ=L/r represents the slenderness ratio of steel tube member bar in formula.
Table 1 is single order, the second order vibration critical wind speed of structures difference end restraint, and cantilever is taken for tubular type lightning rod Shape parameter, other structures form presses actual conditions value.According to lightning rod end restraint actual conditions, one, second order is calculated Vibration critical wind speed, the transformer station's air monitoring instrument as residing for lightning rod carries out counting the number of times for actually occurring critical wind velocity, In evaluation cycle with ten minutes statistics once, the number of times that statistics resonates.Under field conditions (factors), when resonance occurs, more with knot The take place frequently single order of raw locking, i.e. whirlpool vibration frequency and structure, second order fundamental frequency of the single order and divalent radical of structure is consistent, estimates that whirlpool shakes accumulation The frequency, first to structure one, second order fundamental frequency carry out calculating and obtain test, cannot be obtained accurately using general reduced mechanical model Frequency, therefore set up FEM model, carry out model analysis and obtained the one of steel pipe lightning rod, second order frequency.Risen for single order The wind speed of vibration frequency, if calculated value is less than 5m/s, will not typically cause lightning rod to vibrate, therefore need to only consider Second Vibration Mode of Natural Frequencies The wind speed statistics of lower generation.
As shown in accompanying drawing 1, table 1, table 2, table 3 and table 4, in the 5th step, due to inclining, it is subject in lightning rod working condition The influence of alternation wind load and low temperature, can deteriorate lightning rod heeling condition, ultimately result in down bar, cause the great thing of transformer station Therefore, it is 4 to set the lightning rod gradient weight coefficient, if below 50m gradients are less than 10 ‰, more than 50m gradients are less than 5 ‰, belong to normal dip state, the basic deduction of points value 2 of I grades of state degree is multiplied according to weight coefficient 4, this should deduct points 8 points, judge It is " normal condition " to continue to run with;If below 50m gradients be 10 ‰ to 15 ‰, more than 50m gradients be 5 ‰ to 10 ‰, it is deterioration beginning state, multiply state degree deduction of points value 4 substantially by weight coefficient 4, this deduction of points value is 16 points, is judged as " attention state ", should strengthen monitoring;If below 50m gradients be 15 ‰ to 20 ‰, more than 50m gradients be 10 ‰ to 15 ‰, show that lightning rod heeling condition continues to deteriorate, according to weight and basic deduction of points value product, this deducts points 32 points, is judged as " abnormality ", should be processed in proper moment;If below 50m gradients >=20 ‰, more than 50m gradients >=15 ‰, 40 points of this deduction of points value, is judged as " severe conditions ", shows that lightning rod has occurred than more serious inclination, should be at arrangement in time Reason;
Steel construction damage in itself deforms what index judged not with crack as standard with amount of deflection etc., therefore, setting keeps away Thunder pin amount of deflection weight coefficient is 4, as amount of deflection lattice >=H/200;Steel-tube construction >=H/35, is deterioration beginning state, by weight Coefficient 4 multiplies basic deduction of points value 4, and this deduction of points value is 16 points, is judged as " attention state ";Lattice >=4H/125;Steel-tube construction >=2H/125, shows that lightning rod amount of deflection state continues to deteriorate, and according to weight and basic deduction of points value product, this deducts points 32 points, sentence Break is " abnormality ";Lattice >=H/100;Steel-tube construction >=H/70,40 points of this deduction of points value, is judged as " severe conditions ", Show that lightning rod has occurred, than more serious deformation, to process in time, wherein H is that truss column calculates point height;
Bolt is lacked or loosening shows that lightning rod has different degrees of defect, therefore, lightning rod bolt missing or pine are set Dynamic quantity of state weight coefficient is 4, and when a small amount of bolt is lacked, bolt looseness 2% to 10% is deterioration beginning state, by weight Coefficient 4 multiplies basic deduction of points value 4, and this deduction of points value is 16 points, is judged as " attention state ";Lack more bolt, bolt looseness 10% to 15%, show that lightning rod state continues to deteriorate, according to weight and state degree deduction of points value product substantially, this deduction of points 32 Point, it is judged as " abnormality ";Lack a large amount of bolts, bolt looseness more than 15%, 40 points of this deduction of points value is judged as " serious State ", shows that lightning rod has occurred, than more serious state deteriorating, to process in time;
Bolt corrosion shows bolt hydraulic performance decline, will endanger lightning rod safe operation, therefore, lightning rod bolt corrosion is set Quantity of state weight coefficient is 4, if zinc coat fails, there is slight corrosion, then be deterioration beginning state, is multiplied substantially by weight coefficient 4 Deduction of points value 4, this deduction of points value is 16 points, is judged as " attention state ";If corrosion is more serious, more bolt and gusset plate are peeled off, Show that lightning rod state continues to deteriorate, according to weight and state degree deduction of points value product substantially, this deducts points 32 points, be judged as " abnormality ";If lacking a large amount of bolts, during bolt looseness more than 15%, 40 points of this deduction of points value is judged as " severe conditions ", Show that lightning rod bolt has occurred, than more serious state deteriorating, to process in time;
Bolt performance detection, is sampling observation project, extracts some of lightning rod flange bolt, carries out hardness determination, bolt Can decline and show that lightning rod consolidates hydraulic performance decline, therefore, it is 4 to set lightning rod bolt performance detection quantity of state weight coefficient, if Hardness declines 10% to 20%, is deterioration beginning state, and basic deduction of points value 4 is multiplied by weight coefficient 4, and this deduction of points value is 16 points, It is judged as " attention state ";If hardness declines 20% to 40%, show that lightning rod state continues to deteriorate, according to weight and state journey Basic deduction of points value product is spent, this deducts points 32 points, be judged as " abnormality ";If hardness declines more than 40%, this deduction of points 40 points of value, is judged as " severe conditions ", shows that lightning rod bolt has occurred, than more serious state deteriorating, to process in time;
Bolt ultrasound examination, is on-line checking project, and detection content is with the presence or absence of crack defect, if crackle lacks Fall into, show that bolt performance declines, lightning rod consolidates performance degradation, therefore, lightning rod bolt ultrasound examination state is set Amount weight coefficient is 4, is deterioration beginning state if bolt crack defect occurs and accounts for less than 10%, and basic button is multiplied by weight coefficient 4 Score value 4, this deduction of points value is 16 points, is judged as " attention state ";If crack defect occurs in bolt accounts for 10% to 15%, show to keep away Thunder needle-like state continues to deteriorate, and according to weight and state degree deduction of points value product substantially, this deducts points 32 points, is judged as " abnormal shape State ";If crack defect occurs in bolt when accounting for more than 15%, 40 points of this deduction of points value is judged as " severe conditions ", shows lightning rod Bolt has occurred, than more serious state deteriorating, to process in time;
The lightning rod body of rod resonate under wind action, it will usually produce down wind, torsional direction and beam wind to wind shake Response, long-term wind shake can cause lightning rod bolt hydraulic performance decline, jeopardize lightning rod safe operation, and current structural dynamic was tested Journey is cumbersome, is difficult to implement, therefore, counted using the wind speed resonated under intrinsic frequency, it is the method for being easier to implement, take shelter from the thunder Shank resonance body causes lightning rod performance degradation to be a long process, therefore, it is 3 to set lightning rod body of rod resonance weight coefficient, If generation resonance number of times statistics is less than 2%, belong to normal condition, according to weight coefficient 3 and the basic deduction of points value 2 of I grades of state degree, This should deduct points 6 points, be judged as " normal condition ", can continue to run with;If generation resonance number of times statistics is accounted for more than 2% to 5%, It is deterioration beginning state, state degree deduction of points value 4 substantially is multiplied by weight coefficient 3, this deduction of points value is 12 points, by table 3, is judged as " attention state ", should strengthen monitoring;If generation resonance number of times statistics account for when more than 5% to 10%, show lightning rod state after Continuous to deteriorate, according to weight and basic deduction of points value product, this deducts points 24 points, is judged as " abnormality ", should in proper moment, Processed;If generation resonance number of times statistics accounts for more than 10%, 40 points of this deduction of points value is judged as " severe conditions ", shows There are more resonance number of times in lightning rod, serious harm will be produced to lightning rod, should the treatment of arrangement in time.
Above technical characteristic constitutes highly preferred embodiment of the present invention, and it has stronger adaptability and optimal implementation effect Really, can according to actual needs increase and decrease non-essential technical characteristic to meet the demand of different situations.
The different end restraint steel tube member bar vibration critical wind speed calculating formulas of table 1
The evaluation table of the lightning rod quantity of state of table 2
The lightning rod evaluation criterion of table 3
The lightning rod quantity of state of table 4 and its state degree standard of deducting point

Claims (4)

1. a kind of lightning rod security performance comprehensive estimation method for being applied to wind area, it is characterised in that comprise the following steps:
The first step:The abnormal conditions existed according to existing lightning rod determine lightning rod safety evaluation state component, including lightning-arrest Pin gradient, lightning-arrest shank top maximum defluxion, bolt missing and loosening, bolt corrosion, bolt performance detection and the lightning rod body of rod Resonance, afterwards into second step;
Second step:According to state component to the influence degree of lightning rod safe operation and by measurement and calculating to lightning rod safety Property assessment classified, including important state component and general state component, the corresponding weight of general state component are respectively power 1, weight 2 is weighed, its coefficient is 1,2, the corresponding weight of important state component is respectively weight 3, weight 4, its coefficient is 3,4, it Enter the 3rd step afterwards;
3rd step:Degradation setting degradation level according to state component, degradation level includes I grades, II grade, III level and IV Level, afterwards into the 4th step;
4th step:According to the corresponding basic deduction of points value of degradation level setting, described degradation level I grades, II grade, III level and IV grades Corresponding deduction of points value is respectively 2 points, 4 points, 8 points and 10 points, afterwards into the 5th step;
5th step:Weighted value and basic deduction of points value according to second step and the 4th step carry out state evaluation to lightning rod, according to shape The value that should deduct points of state evaluation result is classified to the security performance of lightning rod:Normal condition, attention state, abnormality and tight Weight state, afterwards into the 6th step;
6th step:Deducted points and added up to deduction of points to form state evaluation according to the individual event of lightning rod quantity of state to report, and list each state point The deduction of points reason of amount, when lightning rod is determined as attention state, is directly entered defect processing program, for be determined as abnormality and The lightning rod of severe conditions takes corresponding Strategies of Maintenance or changes lightning rod.
2. the lightning rod security performance comprehensive estimation method for being applied to wind area according to claim 1, it is characterised in that: In second step, to lightning rod gradient, lightning-arrest shank top maximum defluxion, bolt missing and loosening, bolt corrosion, the inspection of bolt performance Survey and the measurement of lightning rod body of rod resonance includes following methods:
(1) gradient of measurement lightning rod using measuring apparatus to the gradient and the gradient of below 50m of more than lightning rod 50m Measure;
(2) lightning-arrest shank top maximum defluxion is measured, lattice and steel-tube construction is carried out using equipment according to deflection deformation index Measurement;
(3) bolt of lightning rod flange connections is checked using manual observation method, the bolt scope of examination includes bolt Corrosion, the loosening situation of bolt;
(4) bolt of lightning rod flange connections is detected using equipment, the detection content of bolt includes ultrasound examination Inspected by random samples with hardness;
(5) measurement of lightning rod body of rod resonance includes counting the resonance number of times under lightning rod intrinsic frequency.
3. the lightning rod security performance comprehensive estimation method for being applied to wind area according to claim 2, it is characterised in that:Keep away It is it is determined that under wind speed, according to the annual air monitoring data for occurring, entering that resonance number of times under thunder pin intrinsic frequency carries out statistics The statistics of the capable wind speed frequency, the computational methods for the resonance number of times statistics of lightning rod intrinsic frequency are as follows:
For circular section hollow cylinder, vibration critical wind speed is expressed as:
V c r = 5 2 π · λ n 2 · E ρ ( r L ) 2 ( n = 1 , 2 , 3... ) - - - ( 1 )
In formula, constant λnIt is natural frequency of vibration parameter, according to vibration order and end restraint condition value, E is Young's modulus, and ρ is close Degree, L is length, the radius of gyrationD is cylinder diameter;
For circular section hollow steel pipe, Young's modulus and density are usually taken to be 2.06 × 1011N/m2With 7.85 × 103kg/m3, because And, above formula can be further simplified as again:
V c r = 11530 λ n 2 λ 2 ( n = 1 , 2 , 3... ) - - - ( 2 )
λ=L/r represents the slenderness ratio of steel tube member bar in formula.
4. the lightning rod security performance comprehensive estimation method for being applied to wind area according to Claims 2 or 3, its feature exists In:In the 5th step, it is 4 to set the lightning rod gradient weight coefficient, when below 50m gradients are less than 10 ‰, more than 50m Gradient is less than 5 ‰, belongs to normal dip state, and the basic deduction of points value 2 of I grades of state degree is multiplied according to weight coefficient 4, and this should detain Divide 8 points, be judged as " normal condition ", can continue to run with;If below 50m gradients are 10 ‰ to 15 ‰, more than 50m gradients It is 5 ‰ to 10 ‰, is deterioration beginning state, state degree deduction of points value 4 substantially is multiplied by weight coefficient 4, this deduction of points value is 16 points, It is judged as " attention state ", monitoring should be strengthened;If below 50m gradients are 15 ‰ to 20 ‰, more than 50m gradients are 10 ‰ To 15 ‰, show that lightning rod heeling condition continues to deteriorate, according to weight and basic deduction of points value product, this deducts points 32 points, judges It is " abnormality " that should be processed in proper moment;When below 50m gradients >=20 ‰, more than 50m gradients >= When 15 ‰, 40 points of this deduction of points value is judged as " severe conditions ", shows that lightning rod has occurred than more serious inclination, should be timely Arrangement is processed;
It is 4 to set lightning rod amount of deflection weight coefficient, as amount of deflection lattice >=H/200;Steel-tube construction >=H/35, for deterioration starts shape State, basic deduction of points value 4 is multiplied by weight coefficient 4, and this deduction of points value is 16 points, is judged as " attention state ";Lattice >=4H/125; Steel-tube construction >=2H/125, shows that lightning rod amount of deflection state continues to deteriorate, according to weight and basic deduction of points value product, this deduction of points 32 points, it is judged as " abnormality ";Lattice >=H/100;Steel-tube construction >=H/70,40 points of this deduction of points value is judged as " serious State ", shows that lightning rod has occurred, than more serious deformation, to process in time, and wherein H is that truss column calculates point height;
The quantity of state weight coefficient for setting lightning rod bolt missing or loosening is 4, when lacking a small amount of bolt, bolt looseness 2% to 10%, it is deterioration beginning state, multiply basic deduction of points value 4 by weight coefficient 4, this deduction of points value is 16 points, is judged as " noting shape State ";Lack more bolt, bolt looseness 10% to 15% shows that lightning rod state continues to deteriorate, according to weight and state degree Basic deduction of points value product, this deducts points 32 points, is judged as " abnormality ";Lack a large amount of bolts, bolt looseness more than 15% should 40 points of item deduction of points value, is judged as " severe conditions ", shows that lightning rod has occurred, than more serious state deteriorating, to process in time;
It is 4 to set lightning rod bolt corrosion quantity of state weight coefficient, if zinc coat fails, there is slight corrosion, then for deterioration starts State, basic deduction of points value 4 is multiplied by weight coefficient 4, and this deduction of points value is 16 points, is judged as " attention state ";If corrosion is more serious, More bolt and gusset plate are peeled off, and show that lightning rod state continues to deteriorate, according to weight and state degree deduction of points value product substantially, This deducts points 32 points, is judged as " abnormality ";If lacking a large amount of bolts, during bolt looseness more than 15%, this deduction of points value 40 Point, it is judged as " severe conditions ", show that lightning rod bolt has occurred, than more serious state deteriorating, to process in time;
It is 4 to set lightning rod bolt performance detection quantity of state weight coefficient, if hardness declines 10% to 20%, for deterioration starts shape State, basic deduction of points value 4 is multiplied by weight coefficient 4, and this deduction of points value is 16 points, is judged as " attention state ";If hardness declines 20% To 40%, show that lightning rod state continues to deteriorate, according to weight and state degree deduction of points value product substantially, this deducts points 32 points, It is judged as " abnormality ";If hardness declines more than 40%, 40 points of this deduction of points value is judged as " severe conditions ", shows to keep away Thunder pin bolt has occurred, than more serious state deteriorating, to process in time;
It is 4 to set lightning rod bolt ultrasound examination quantity of state weight coefficient, if bolt crack defect occurs and accounts for less than 10%, is Deterioration beginning state, basic deduction of points value 4 is multiplied by weight coefficient 4, and this deduction of points value is 16 points, is judged as " attention state ";If spiral shell There is crack defect and accounts for 10% to 15% in bolt, shows that lightning rod state continues to deteriorate, and is deducted points substantially with state degree according to weight Value product, this deducts points 32 points, is judged as " abnormality ";If there is crack defect in bolt when accounting for more than 15%, this deduction of points 40 points of value, is judged as " severe conditions ", shows that lightning rod bolt has occurred, than more serious state deteriorating, to process in time;
It is 3 to set lightning rod body of rod resonance weight coefficient, if resonance number of times statistics occurs is less than 2%, belongs to normal condition, according to Weight coefficient 3 multiplies the basic deduction of points value 2 of I grades of state degree, and this should deduct points 6 points, be judged as " normal condition ", can continue fortune OK;It is deterioration beginning state if generation resonance number of times statistics is accounted for more than 2% to 5%, multiplies state degree by weight coefficient 3 basic Deduction of points value 4, this deduction of points value is 12 points, by table 3, is judged as " attention state ", should strengthen monitoring;If generation resonance number of times system Meter is accounted for when more than 5% to 10%, shows that lightning rod state continues to deteriorate, according to weight and basic deduction of points value product, this deduction of points 24 points, it is judged as " abnormality ", should be processed in proper moment;If generation resonance number of times statistics accounts for more than 10%, 40 points of this deduction of points value, is judged as " severe conditions ", shows that lightning rod has occurred more resonance number of times, and lightning rod will be produced Raw serious harm, should the treatment of arrangement in time.
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