CN106405390B - A Quantitative Judgment Method for Operational Reliability and Operational Life of Distribution Switchgear - Google Patents
A Quantitative Judgment Method for Operational Reliability and Operational Life of Distribution Switchgear Download PDFInfo
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- CN106405390B CN106405390B CN201510451972.7A CN201510451972A CN106405390B CN 106405390 B CN106405390 B CN 106405390B CN 201510451972 A CN201510451972 A CN 201510451972A CN 106405390 B CN106405390 B CN 106405390B
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Abstract
The present invention provides the quantization determination method of a kind of distribution switchgear operational reliability and service life, comprising the following steps: determines the characteristic parameter of distribution switchgear；Distribution switchgear is tested under the same terms, and judges whether test result has convergence, if test result has convergence, performs the next step, otherwise shows that distribution switchgear does not have operational reliability；Quantization judgement is carried out to distribution switchgear operational reliability and service life.The present invention scientific, efficiently, accurately can carry out quantization judgement to distribution switchgear operational reliability and service life, under the premise of guaranteeing to determine that result is accurate and reliable, have to the trackability for determining result and repeatable verifying, can be according to different distribution switchgears the characteristics of, operational reliability and the service life quantization carried out between different manufacturers same category of device determines, reach superseded low-level manufacturing enterprise, the purpose for promoting distribution switchgear to change to high reliability and high service life.
Description
Technical field
The present invention relates to a kind of determination methods, and in particular to a kind of distribution switchgear operational reliability and service life
Quantify determination method.
Background technique
Distribution switchgear is the important component in electric system, is to ensure that the core of distrbution network operational safety is set
Standby, the superiority and inferiority of distribution switchgear performance directly influences the operational safety of power distribution network or even entire electric system.Due to distribution
Switchgear has the characteristics that kind is miscellaneous, quantity is big, involving a wide range of knowledge and having a power failure influences big, the operational reliability of equipment and operation longevity
Life is to determine the basis of power distribution network safety in operation and reliability.The operational reliability of distribution switchgear is not always for a long time
Due attention is obtained, lacks basic basic data data collection, more lacks scientific and effective determination method, rest on always
It is leading qualitative evaluation level with experience, has been unable to meet the demand of smart grid development.This qualitative evaluation mode exists
Following drawback:
It (1) is leading qualitative evaluation with experience due to using, it is not only very high to the skill requirement of evaluator, but also want
Ask evaluator that there is good fairness, otherwise human factor and external environment can generate significant impact to assessment result, even
It will lead to deviating from for assessment result；
(2) since evaluator needs to have enough experiences, evaluator needs to be familiar with various distribution switchgears
Principle, structure, processing method, process flow and test method etc., and it also requires having quite long work experience and reality
Experience is trampled, can not be matched with present smart grid with the high speed development of intelligent equipment manufacture；
(3) due to not having repeatability using qualitative evaluation, lack scientific theory support, assessed once replacing
Person, assessment result will will appear biggish variation and irregular, insufficient to the convincingness of evaluated person；
(4) since qualitative evaluation mode does not have trackability, deviation is big, low efficiency, is not able to satisfy to high-volume distribution
The assessment of switchgear.
Summary of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a kind of distribution switchgear operational reliability and operation
The quantization determination method in service life, this method can science, efficiently, accurately to distribution switchgear operational reliability and operation the longevity
Life is quantitatively judged.
In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical scheme that:
The present invention provides the quantization determination method of a kind of distribution switchgear operational reliability and service life, the quantization
Determination method specifically includes the following steps:
Step 1: determining the characteristic parameter of distribution switchgear；
Step 2: distribution switchgear is tested under the same terms, and judges whether test result has convergence,
If test result has convergence, performs the next step, otherwise show that distribution switchgear does not have operational reliability；
Step 3: quantization judgement is carried out to distribution switchgear operational reliability and service life.
In the step 1, the characteristic parameter of distribution switchgear includes the major loop feature ginseng of distribution switchgear
Amount, mechanical property characteristic parameter, operating mechanism characteristic parameter, secondary protector characteristic parameter and auxiliary and safety equipment are special
Levy parameter.
Major loop characteristic parameter of distribution switchgear includes the contact resistance of a major loop, tolerance overcurrent energy
Power and tolerance overvoltage ability；
The auxiliary and safety equipment characteristic parameter of distribution switchgear include electrical five anti-signals, acoustic warning signal and view
Frequency monitoring signal.
The mechanical property characteristic parameter of distribution switchgear includes closing time, average closing speed, has just closed speed, closed a floodgate
Spring, contact pressure, opening time, average opening velocity, just-off speed and separating brake overshoot.
The operating mechanism characteristic parameter of distribution switchgear includes spring operating mechanism characteristic parameter and permanent-magnet operating mechanism
Characteristic parameter.
The spring operating mechanism characteristic parameter includes that the first closing coil characteristic parameter and the first opening coil feature are joined
Amount；
First closing coil characteristic parameter includes the initial actuating electric current of the first closing coil, initial actuating voltage, stable state
Current duration, magnetic bobbin core stroke, magnetic bobbin core movement velocity and reset spring decrement；
First opening coil characteristic parameter includes the initial actuating electric current of the first opening coil, initial actuating voltage, stable state
Current duration, magnetic bobbin core stroke, magnetic bobbin core movement velocity and reset spring resetting time.
The permanent-magnet operating mechanism characteristic parameter includes storage capacitor characteristic parameter, the second closing coil characteristic parameter and
Two opening coil characteristic parameters；
Storage capacitor characteristic parameter includes voltage, capacitance, continuous discharging time and the discharge current of storage capacitor；
Second closing coil characteristic parameter includes the initial actuating electric current of the second closing coil, initial actuating voltage, stable state
Current duration, magnetic bobbin core stroke and magnetic bobbin core movement velocity；
Second opening coil characteristic parameter includes the initial actuating electric current of the second opening coil, initial actuating voltage, stable state
Current duration, magnetic bobbin core stroke and magnetic bobbin core movement velocity.
The secondary protector characteristic parameter of distribution switchgear includes the action response time of secondary protector, protection
Actuation time, protection act value, tolerance EMC ability and communication accuracy.
In the step 2, distribution switchgear is tested under the same terms, testing time N is not more than panel switches
The 1/10 of equipment life expectancy, for any feature parameter, if the corresponding test result of any 4N/5 test is all larger than distribution
Switchgear life standard lower limit and be less than the distribution switchgear life standard upper limit, then show test result have convergence,
Execute step 3；Otherwise show that test result does not have convergence, and then distribution switchgear does not have operational reliability.
The step 3 specifically includes the following steps:
Step 3-1: being fitted test result, after obtaining matched curve, derives panel switches according to matched curve
The expection derivation result of equipment compares expected derivation result with test result, if the two is inconsistent, to matched curve
It is modified, and iterates, until the two is consistent；
Step 3-2: on the basis of test result and consistent expected derivation result, carrying out the iteration in 2 or more periods, if
Expected derivation result is consistent with test result after iteration, then shows that the corresponding fitting consistent with test result of expected derivation result is bent
Line is the service life change curve of distribution switchgear individual features parameter；
Step 3-3: it can be derived and be matched by the service life change curve of the distribution switchgear individual features parameter
The characteristic parameter of following each point in the life expectancy of electric switching system, when the characteristic parameter of certain point reaches the distribution switchgear longevity
When ordering standard max, then the point is inflection point, and the corresponding testing time of the point is the distribution switchgear character pair
The maximum service life of parameter；
Step 3-4: and so on, the maximum service life of all characteristic parameters of the distribution switchgear is acquired, with wood
Bucket be filled with water short slab theory, the final service life of the distribution switchgear can be acquired.
The distribution switchgear includes breaker, vacuum contactor, on-load switch and disconnecting switch；The breaker packet
Vacuum circuit breaker and SF6 breaker are included, the on-load switch includes vacuum load switch, SF6 on-load switch and air type load
Switch.
Compared with prior art, the beneficial effects of the present invention are:
1, the present invention is effective improves the accuracy and effect determined distribution switchgear operational reliability and service life
Rate has reached control equipment networking operation inferior, and can achieve the purpose that power distribution network operational safety；
2, principle of the invention science, it is easy to operate, there is very strong innovation and practical value；
3, the degree of convergence in the present invention determines and the wooden barrel short slab that is filled with water is theoretical, it can be achieved that different manufacturing enterprise, same
Different batches in enterprise, the horizontal and vertical judgement in same batch between distinct device determine that result is accurate, quick；
4, the synthesis to operator is determined the invention enables the operational reliability of entire distribution switchgear and service life
Competency profiling is substantially reduced, and the operational safety that can effectively improve controller switching equipment and power distribution network is horizontal, and social benefit is very significant；
5, the characteristic parameter in the present invention can be determined according to the characteristics of different classes of distribution switchgear, specific number
Amount can be also increased and decreased according to judgement demand, and the flexibility of operation is very strong；
6, determination method in the present invention, it is expansible and extend to other voltage class or other industries, have to these
The operational reliability and service life of the equipment of dynamic action characteristic determine.
Detailed description of the invention
Fig. 1 is that distribution switchgear characteristic parameter test result is in dispersed schematic diagram in the embodiment of the present invention；
Fig. 2 is that distribution switchgear characteristic parameter test result has convergence schematic diagram in the embodiment of the present invention；
Fig. 3 is the same characteristic parameter test result contrast schematic diagram of 2 station power distribution switchgears in the embodiment of the present invention；
Fig. 4 is characteristic parameter fit procedure schematic diagram in the embodiment of the present invention.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
The quantization determination method of distribution switchgear operational reliability and service life provided by the invention being capable of science, height
Effect accurately carries out quantization judgement to distribution switchgear operational reliability and service life, is guaranteeing to determine that result accurately may be used
Under the premise of leaning on, have to the trackability for determining result and repeatable verifying, it can be according to the spy of different distribution switchgears
Point, operational reliability and the service life quantization carried out between different manufacturers same category of device determine, reach superseded low-level manufacture enterprise
Industry, the purpose for promoting distribution switchgear to change to high reliability and high service life.
The present invention provides the quantization determination method of a kind of distribution switchgear operational reliability and service life, the quantization
Determination method specifically includes the following steps:
Step 1: determining the characteristic parameter of distribution switchgear；
Step 2: distribution switchgear is tested under the same terms, and judges whether test result has convergence,
If test result has convergence, perform the next step, otherwise shows that distribution switchgear does not have operational reliability (test
As a result not having convergence is to disperse)；
Step 3: quantization judgement is carried out to distribution switchgear operational reliability and service life.
In the step 1, the characteristic parameter of distribution switchgear includes the major loop feature ginseng of distribution switchgear
Amount, mechanical property characteristic parameter, operating mechanism characteristic parameter, secondary protector characteristic parameter and auxiliary and safety equipment are special
Levy parameter.
Major loop characteristic parameter of distribution switchgear includes the contact resistance of a major loop, tolerance overcurrent energy
Power and tolerance overvoltage ability；
The auxiliary and safety equipment characteristic parameter of distribution switchgear include electrical five anti-signals, acoustic warning signal and view
Frequency monitoring signal.
The mechanical property characteristic parameter of distribution switchgear includes closing time, average closing speed, has just closed speed, closed a floodgate
Spring, contact pressure, opening time, average opening velocity, just-off speed and separating brake overshoot.
The operating mechanism characteristic parameter of distribution switchgear includes spring operating mechanism characteristic parameter and permanent-magnet operating mechanism
Characteristic parameter.
The spring operating mechanism characteristic parameter includes that the first closing coil characteristic parameter and the first opening coil feature are joined
Amount；
First closing coil characteristic parameter includes the initial actuating electric current of the first closing coil, initial actuating voltage, stable state
Current duration, magnetic bobbin core stroke, magnetic bobbin core movement velocity and reset spring decrement；
First opening coil characteristic parameter includes the initial actuating electric current of the first opening coil, initial actuating voltage, stable state
Current duration, magnetic bobbin core stroke, magnetic bobbin core movement velocity and reset spring resetting time.
The permanent-magnet operating mechanism characteristic parameter includes storage capacitor characteristic parameter, the second closing coil characteristic parameter and
Two opening coil characteristic parameters；
Storage capacitor characteristic parameter includes voltage, capacitance, continuous discharging time and the discharge current of storage capacitor；
Second closing coil characteristic parameter includes the initial actuating electric current of the second closing coil, initial actuating voltage, stable state
Current duration, magnetic bobbin core stroke and magnetic bobbin core movement velocity；
Second opening coil characteristic parameter includes the initial actuating electric current of the second opening coil, initial actuating voltage, stable state
Current duration, magnetic bobbin core stroke and magnetic bobbin core movement velocity.
The secondary protector characteristic parameter of distribution switchgear includes the action response time of secondary protector, protection
Actuation time, protection act value, tolerance EMC ability and communication accuracy.
In the step 2, distribution switchgear is tested under the same terms, testing time N, which is less than or equal to match, to be established by cable
The 1/10 of equipment life expectancy is closed, for any feature parameter, is matched if the corresponding test result of any 4N/5 test is all larger than
Electric switching system life standard lower limit and be less than the distribution switchgear life standard upper limit, then show test result have convergence
Property, execute step 3；Otherwise show that test result does not have convergence, and then distribution switchgear does not have operational reliability.
The step 3 specifically includes the following steps:
Step 3-1: being fitted test result, after obtaining matched curve, derives panel switches according to matched curve
The expection derivation result of equipment compares expected derivation result with test result, if the two is inconsistent, to matched curve
It is modified, and iterates, until the two is consistent；
Step 3-2: on the basis of test result and consistent expected derivation result, carrying out the iteration in 2 or more periods, if
Expected derivation result is consistent with test result after iteration, then shows that the corresponding fitting consistent with test result of expected derivation result is bent
Line is the service life change curve of distribution switchgear individual features parameter；
Step 3-3: it can be derived and be matched by the service life change curve of the distribution switchgear individual features parameter
The characteristic parameter of following each point in the life expectancy of electric switching system, when the characteristic parameter of certain point reaches the distribution switchgear longevity
When ordering standard max, then the point is inflection point, and the corresponding testing time of the point is the distribution switchgear character pair
The maximum service life of parameter；
Step 3-4: and so on, the maximum service life of all characteristic parameters of the distribution switchgear is acquired, with wood
Bucket be filled with water short slab theory, the final service life of the distribution switchgear can be acquired.
The distribution switchgear includes breaker, vacuum contactor, on-load switch and disconnecting switch；The breaker packet
Vacuum circuit breaker and SF6 breaker are included, the on-load switch includes vacuum load switch, SF6 on-load switch and air type load
Switch.
Fig. 1 is that distribution switchgear characteristic parameter test result is in dispersed schematic diagram, and by Fig. 1, it is not difficult to find out that, this is matched
This characteristic parameter of electric switching system is in the upper lower limit value range for surmounting standard value always, and variation tendency is not advised
Rule, therefore can be determined that the distribution switchgear does not have stable operation ability, expected service life is not achieved.
Fig. 2 is that distribution switchgear characteristic parameter test result has convergence schematic diagram, it is not difficult to find out that, is somebody's turn to do by Fig. 2
This characteristic parameter of distribution switchgear has the case where upper lower limit value range for surmounting design value in early period, but then gradually becomes
Change fluctuation to reduce, and all within the scope of the upper lower limit value of standard value, convergence state is presented, therefore can be determined that this is matched and establish by cable
It closes equipment and has stable operation ability, it is possible to reach design service life.
Fig. 3 be 2 station power distribution switchgears same characteristic parameter test result contrast schematic diagram, by Fig. 3 it is not difficult to find out that, 2
This characteristic parameter of station power distribution switchgear has the case where upper lower limit value range for surmounting standard value in early period, but then by
Gradual changeization fluctuation is reduced, and all within the scope of the upper lower limit value of standard value, convergence state is presented, while can be seen that dotted line
Curve representated by the test result fluctuation of distribution switchgear be higher than another distribution switchgear, therefore can be determined that
This 2 station power distribution switchgear is provided with stable operation ability, it is possible to reach design service life, but distribution representated by dotted line
The operational reliability of switchgear will be lower than another distribution switchgear.
Fig. 4 be distribution switchgear characteristic parameter fit procedure schematic diagram, by Fig. 4 it is not difficult to find out that, the distribution switchgear
This characteristic parameter convergence state is presented, while can be seen that subsequent matched curve and test result fit like a glove,
Mathematic(al) representation corresponding to this section of curve can accurately derive that the institute of each point in the distribution switchgear future life period is right
The characteristic parameter numerical value answered, and service life inflection point can be found.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, institute
The those of ordinary skill in category field can still modify to a specific embodiment of the invention referring to above-described embodiment or
Equivalent replacement, these are applying for this pending hair without departing from any modification of spirit and scope of the invention or equivalent replacement
Within bright claims.
Claims (8)
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| CN107192941B (en) * | 2017-05-03 | 2021-02-05 | 广州供电局有限公司 | Analysis method and management method for dynamic load capacity of circuit breaker |
| CN111273169A (en) * | 2020-01-20 | 2020-06-12 | 中国电力科学研究院有限公司 | A kind of distribution switch quantitative evaluation test device and method |
| CN111582661A (en) * | 2020-04-17 | 2020-08-25 | 岭东核电有限公司 | Comprehensive evaluation method and device for replacement of filter for nuclear power station and terminal equipment |
| CN112698129A (en) * | 2020-12-11 | 2021-04-23 | 深圳供电局有限公司 | Power distribution network equipment reliability analysis method and system based on multi-system information fusion |
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| CN102879735A (en) * | 2012-10-11 | 2013-01-16 | 桂林电子科技大学 | Online electric abrasion detecting method and system of vacuum circuit breaker |
| CN103592595A (en) * | 2013-09-16 | 2014-02-19 | 中机国能电力工程有限公司 | Fault diagnosis method of switching current circuit |
| CN103616635A (en) * | 2013-12-05 | 2014-03-05 | 国家电网公司 | Method and device for diagnosing mechanical characteristic failures of high-voltage circuit-breaker |
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| US7602265B2 (en) * | 2005-10-20 | 2009-10-13 | International Business Machines Corporation | Apparatus for accurate and efficient quality and reliability evaluation of micro electromechanical systems |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879735A (en) * | 2012-10-11 | 2013-01-16 | 桂林电子科技大学 | Online electric abrasion detecting method and system of vacuum circuit breaker |
| CN103592595A (en) * | 2013-09-16 | 2014-02-19 | 中机国能电力工程有限公司 | Fault diagnosis method of switching current circuit |
| CN103616635A (en) * | 2013-12-05 | 2014-03-05 | 国家电网公司 | Method and device for diagnosing mechanical characteristic failures of high-voltage circuit-breaker |
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