CN114329955A - Comprehensive-sensing switch cabinet service life assessment method - Google Patents
Comprehensive-sensing switch cabinet service life assessment method Download PDFInfo
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- CN114329955A CN114329955A CN202111613344.6A CN202111613344A CN114329955A CN 114329955 A CN114329955 A CN 114329955A CN 202111613344 A CN202111613344 A CN 202111613344A CN 114329955 A CN114329955 A CN 114329955A
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Abstract
The invention discloses a method for evaluating the service life of a switch cabinet by comprehensive perception, which relates to the technical field of methods for evaluating the service life of switch cabinets and aims to solve the problems that the number of power accidents of the switch cabinets rises year by year, the safety operation of a power system is seriously threatened, the aging of a flow guide system is influenced by overhigh environmental temperature, the insulating capability is damaged by the combination of conductive dust and moisture in the atmosphere, and the service life is influenced by the abrasion of a mechanical structure, and the method comprises the following steps of 1: collecting mechanical characteristic parameters through a mechanical characteristic monitoring device, and calculating a switch health degree score M according to the mechanical characteristic parameters; step 2: collecting partial discharge parameters through a partial discharge monitoring device, and calculating a switch health degree score P according to the partial discharge parameters; and step 3: monitoring environmental parameters through a temperature and humidity sensor device, and calculating a switch health degree score T according to the environmental parameters; and 4, step 4: obtaining the comprehensive health degree H of the switch cabinet based on the steps 1-3; and 5: and (4) obtaining the service life L of the switch cabinet based on the step 4.
Description
Technical Field
The invention relates to the technical field of switch cabinet service life assessment methods, in particular to a comprehensive sensing switch cabinet service life assessment method.
Background
The 10kV switch cabinet is used as very important equipment in a Chinese distribution network system, the operation reliability of the switch cabinet is directly related to the power supply reliability, insulation defects or deterioration in the switch cabinet can become hidden troubles of safe operation of the switch cabinet, the hidden troubles are difficult to find under the condition of normal operation of the equipment, in recent years, the number of power accidents caused by the shortage of a switch cabinet field test method and the deterioration of insulation characteristics of an operating switch cabinet is increased year by year, the safe operation of the power system is seriously threatened, the power supply quality and the power supply reliability are finally influenced, the temperature and the humidity in external environment conditions influencing the state of the switch cabinet are high, the ambient environment temperature is overhigh, a certain influence is caused on the aging of a diversion system under the operation condition, the air humidity is overhigh, the surface insulation capability of an insulation material is damaged by the combination of conductive dust and moisture in the atmosphere, and the mechanical stability of a switch body are achieved, the wear and aging of the mechanical structure also affect the service life of the switch cabinet, so that the service life evaluation of the switch cabinet is urgently needed to replace equipment in time, and huge economic loss is avoided.
Disclosure of Invention
The invention aims to provide a comprehensive-sensing switch cabinet service life assessment method, and aims to solve the problems that the number of power accidents of a switch cabinet rises year by year, the safety operation of a power system is seriously threatened, the aging of a diversion system is influenced by overhigh environmental temperature, the insulating capability is damaged by the combination of conductive dust and moisture in the atmosphere, and the service life is influenced by the abrasion of a mechanical structure in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a service life evaluation method of a comprehensive sensing switch cabinet comprises the following steps:
step 1: the mechanical characteristic monitoring device collects mechanical characteristic parameters and calculates switch health degree score M, switching-on and switching-off times n, switching-on and switching-off duration t, switching-on and switching-off speed s and switching-on and switching-off coil peak current i according to the mechanical characteristic parameters;
step 2: the partial discharge monitoring device collects partial discharge parameters and calculates a switch health degree score P, a transient voltage-to-ground voltage fixed value E and an ultrasonic fixed value F according to the partial discharge parameters;
and step 3: monitoring environmental parameters through a temperature and humidity sensor device, and calculating a switch health degree score T, a temperature w and a humidity s according to the environmental parameters;
and 4, step 4: from steps 1 to 3, the overall health H of the switchgear is 0.4 × M +0.4 × P +0.2 × T;
and 5: the service design life of the switch cabinet is 25 years, the switch cabinet is generally replaced in 18 years in the actual use process, and the service life of the switch cabinet after commissioning is calculated according to 20 years in consideration of the period from factory shipment to commissioning. And (4) obtaining the service life L of the switch cabinet as 20 × H/100 according to the step 4.
Further, based on the step 1, where M is 0.3 × M1+0.3 × M2+0.2 × M3+0.2 × M4, after the switch cabinet leaves the factory, a total opening and closing time is set to N according to experience, the standard opening and closing time length is T, the maximum opening and closing time length is Mt, the standard opening and closing speed S is the maximum opening and closing speed Ms, the peak current I of the standard opening and closing coil is Mi, and the peak current of the maximum opening and closing coil is Mi.
Furthermore, the opening and closing parameter score m1 is (1-N/N) × 100 according to the opening and closing times, the opening and closing time length parameter score m2 is (100 points if T < T, and (2- (T/T)) (100 points if T < Mt), and the opening and closing speed parameter score m3 is 100 points if S < S; and (2- (S/S)). times.100) when S < Ms, and the score m4 is 100 when I < I, and (2- (I/I)). times.100 when I < Mi, according to the monitored switching coil peak current parameter.
Further, based on step 2 the healthiness score P0.5P 1+ 0.5P 2;
p1 (100 points if E is 0, 90 points if 0< e.ltoreq.25 dB, 70 points if 25< e.ltoreq.40 dB, 50 points if 40< e.ltoreq.55 dB, 30 points if E >55 dB);
p2 (100 points if F is 0, 90 points if F is not more than 8, 70 points if 8< F is not more than 20, 50 points if 20< F is not more than 30, and 30 points if F > 30).
Further, based on the switch health score T of step 3, 0.5T 1+ 0.5T 2, T1 (100 points if w is less than or equal to 35 ℃, and 90 points if w is less than or equal to 40 ℃;
at 40 ℃ and w is less than or equal to 45 ℃, the temperature is 80 minutes; if the temperature is 45 ℃ and w is less than or equal to 50 ℃, the temperature is 70 minutes; if the temperature is 50 ℃ and w is less than or equal to 55 ℃, the temperature is 60 minutes; if the temperature is 60 ℃ and w is less than or equal to 65 ℃, the temperature is 50 minutes; if the temperature is 65 ℃ and w is less than or equal to 70 ℃, the temperature is 40 minutes); t2 (100 min if s is 60% or less, 80 min if 60% < s is 65% or less, 60 min if 65% < s is 70% or less, and 40 min if 75% < s is 80% or less).
Compared with the prior art, the invention has the beneficial effects that:
1. according to the switch cabinet service life assessment method based on comprehensive perception, the total health degree is calculated through the sum of the mechanical characteristic health score, the partial discharge monitoring device health score and the temperature and humidity sensing monitoring health score, so that various data of the switch cabinet can be known more clearly, performance assessment can be carried out on the data, the service life of the switch cabinet can be calculated, the calculated data are more accurate and clear, the equipment can be predicted to be maintained in advance, and unnecessary loss is reduced.
Drawings
Fig. 1 is a life evaluation algorithm for a switchgear of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a method for evaluating the service life of a switch cabinet by comprehensive perception, which adopts the following technical scheme:
step 1: the mechanical characteristic monitoring device collects mechanical characteristic parameters and calculates switch health degree score M, switching-on and switching-off times n, switching-on and switching-off duration t, switching-on and switching-off speed s and switching-on and switching-off coil peak current i according to the mechanical characteristic parameters;
step 2: the partial discharge monitoring device collects partial discharge parameters and calculates a switch health degree score P, a transient voltage-to-ground voltage fixed value E and an ultrasonic fixed value F according to the partial discharge parameters;
and step 3: monitoring environmental parameters through a temperature and humidity sensor device, and calculating a switch health degree score T, a temperature w and a humidity s according to the environmental parameters;
and 4, step 4: from steps 1 to 3, the overall health H of the switchgear is 0.4 × M +0.4 × P +0.2 × T;
and 5: the service design life of the switch cabinet is 25 years, the switch cabinet is generally replaced in 18 years in the actual use process, and the service life of the switch cabinet after commissioning is calculated according to 20 years in consideration of the period from factory shipment to commissioning. And (4) obtaining the service life L of the switch cabinet as 20 × H/100 according to the step 4.
The health score of mechanical characteristic, the health score of partial discharge monitoring device, the health score sum of temperature and humidity sensing monitoring respectively calculate the total health degree, thereby each item data of understanding cubical switchboard that more clear from this, and can carry out the performance evaluation to it and calculate life, and the data that calculate from this are more accurate clear, can foresee in advance to carry out maintenance to equipment from this, reduce unnecessary loss.
Based on the step 1M being 0.3M 1+ 0.3M 2+ 0.2M 3+ 0.2M 4, after the switch cabinet leaves a factory, one total opening and closing time is set to be N according to experience, the standard opening and closing time length is T, the maximum opening and closing time length is Mt, the standard opening and closing speed S, the maximum opening and closing speed is Ms, the peak current I of the standard opening and closing coil is Mi.
And calculating a formula according to the switch health score.
Obtaining a switching-on and switching-off parameter score m1 which is (1-N/N) × 100 according to the switching-on and switching-off times, obtaining a switching-on and switching-off parameter score m2 which is (100 points if T is T, and (2- (T/T)) × 100 if T is Mt) according to the monitored switching-on and switching-off time length, obtaining a switching-on and switching-off speed parameter score m3 which is 100 points if S is S; if S < Ms, it is (2- (S/S)). times.100), and based on the monitored switching coil peak current parameter score m4, if I < I, it is 100, and if I < Mi, it is (2- (I/I)). times.100.
Based on step 2 healthiness score P0.5P 1+ 0.5P 2;
p1 (100 points if E is 0, 90 points if 0< e.ltoreq.25 dB, 70 points if 25< e.ltoreq.40 dB, 50 points if 40< e.ltoreq.55 dB, 30 points if E >55 dB);
p2 (100 points if F is 0, 90 points if F is not more than 8, 70 points if 8< F is not more than 20, 50 points if 20< F is not more than 30, and 30 points if F > 30).
Based on the switch health score T of step 3 of 0.5T 1+ 0.5T 2, T1 (100 points if w is less than or equal to 35 ℃, and 90 points if w is less than or equal to 40 ℃;
at 40 ℃ and w is less than or equal to 45 ℃, the temperature is 80 minutes; if the temperature is 45 ℃ and w is less than or equal to 50 ℃, the temperature is 70 minutes; if the temperature is 50 ℃ and w is less than or equal to 55 ℃, the temperature is 60 minutes; if the temperature is 60 ℃ and w is less than or equal to 65 ℃, the temperature is 50 minutes; if the temperature is 65 ℃ and w is less than or equal to 70 ℃, the temperature is 40 minutes); t2 (100 min if s is 60% or less, 80 min if 60% < s is 65% or less, 60 min if 65% < s is 70% or less, and 40 min if 75% < s is 80% or less).
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (7)
1. A service life evaluation method of a comprehensive sensing switch cabinet comprises the following steps:
step 1: collecting mechanical characteristic parameters through a mechanical characteristic monitoring device, and calculating a switch health degree score M according to the mechanical characteristic parameters;
step 2: collecting partial discharge parameters through a partial discharge monitoring device, and calculating a switch health degree score P according to the partial discharge parameters;
and step 3: monitoring environmental parameters through a temperature and humidity sensor device, and calculating a switch health degree score T according to the environmental parameters;
and 4, step 4: obtaining the comprehensive health degree H of the switch cabinet based on the steps 1-3;
and 5: and (4) obtaining the service life L of the switch cabinet based on the step 4.
2. The method for estimating the service life of the fully-sensing switch cabinet as claimed in claim 1, wherein: the overall health H ═ 0.4 xm +0.4 × P +0.2 × T.
3. The method for estimating the service life of the fully-sensing switch cabinet as claimed in claim 1, wherein: the service life L of the switch cabinet is 20 × H/100.
4. The method for estimating the service life of the fully-sensing switch cabinet as claimed in claim 1, wherein: based on the step 1, that is, M is 0.3 × M1+0.3 × M2+0.2 × M3+0.2 × M4, after the switch cabinet leaves a factory, a total opening and closing time is set to be N, the maximum opening and closing speed is Ms, the peak current I of the standard opening and closing coil is set to be Mi, and the peak current of the maximum opening and closing coil is set to be Mi.
5. The method for estimating the service life of the fully-sensing switch cabinet as claimed in claim 4, wherein the method comprises the following steps: the switching-on and switching-off parameter score m1 is (1-N/N) × 100 according to the switching-on and switching-off times, the switching-on and switching-off time length parameter score m2 is (if T is less than T, the score is 100, if T is less than Mt, the score is (2- (T/T)) × 100), the switching-on and switching-off speed parameter score m3 is greater according to the monitoring, and the score is 100 if S is less than S; and (2- (S/S)). times.100) when S < Ms, and the score m4 is 100 when I < I, and (2- (I/I)). times.100 when I < Mi, according to the monitored switching coil peak current parameter.
6. The method for estimating the service life of the fully-sensing switch cabinet as claimed in claim 1, wherein: based on step 2 the healthiness score P0.5P 1+ 0.5P 2;
p1 (100 points if E is 0, 90 points if 0< e.ltoreq.25 dB, 70 points if 25< e.ltoreq.40 dB, 50 points if 40< e.ltoreq.55 dB, 30 points if E >55 dB);
p2 (100 points if F is 0, 90 points if F is less than or equal to 8, 70 points if 8< F is less than or equal to 20;
if F is more than 20 and less than or equal to 30, the score is 50; if F >30, 30 points).
7. The method for estimating the service life of the fully-sensing switch cabinet as claimed in claim 1, wherein: based on the switch health score T of step 3, 0.5T 1+ 0.5T 2, T1 (100 points if w is less than or equal to 35 ℃, and 90 points if w is less than or equal to 40 ℃;
at 40 ℃ and w is less than or equal to 45 ℃, the temperature is 80 minutes; if the temperature is 45 ℃ and w is less than or equal to 50 ℃, the temperature is 70 minutes; if the temperature is 50 ℃ and w is less than or equal to 55 ℃, the temperature is 60 minutes; if the temperature is 60 ℃ and w is less than or equal to 65 ℃, the temperature is 50 minutes; if the temperature is 65 ℃ and w is less than or equal to 70 ℃, the temperature is 40 minutes); t2 (100 min if s is 60% or less, 80 min if 60% < s is 65% or less, 60 min if 65% < s is 70% or less, and 40 min if 75% < s is 80% or less).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117782363A (en) * | 2024-02-27 | 2024-03-29 | 山东蓝孚高能物理技术股份有限公司 | Nondestructive measurement method and system for internal temperature of traveling wave electron accelerator |
| CN117782363B (en) * | 2024-02-27 | 2024-05-28 | 山东蓝孚高能物理技术股份有限公司 | Nondestructive measurement method and system for internal temperature of traveling wave electron accelerator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117782363A (en) * | 2024-02-27 | 2024-03-29 | 山东蓝孚高能物理技术股份有限公司 | Nondestructive measurement method and system for internal temperature of traveling wave electron accelerator |
| CN117782363B (en) * | 2024-02-27 | 2024-05-28 | 山东蓝孚高能物理技术股份有限公司 | Nondestructive measurement method and system for internal temperature of traveling wave electron accelerator |
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