CN109254242A - A kind of ablation test circuit and breaker arcing contact ablation state test method - Google Patents
A kind of ablation test circuit and breaker arcing contact ablation state test method Download PDFInfo
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- CN109254242A CN109254242A CN201811089503.5A CN201811089503A CN109254242A CN 109254242 A CN109254242 A CN 109254242A CN 201811089503 A CN201811089503 A CN 201811089503A CN 109254242 A CN109254242 A CN 109254242A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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Abstract
The invention discloses ablation test circuit and breaker arcing contact ablation state test method, which includes that the short circuit current being sequentially connected generates circuit, short circuit current introduces circuit and transient recovery voltage cut-offs circuit；Wherein, which generates circuit for generating short circuit current；The short circuit current introduces circuit and includes portable protective gaps, experimental prototype, transformer, first resistor, first capacitor, pressure measuring instrument, current measuring instrument and prolong arc circuit；This ablation test circuit provides short circuit current wave feature and the short-circuit current of electric system actual motion circuit appearance is close, equivalence with higher.It can provide the short circuit current of any amplitude, arcing time by this ablation test circuit, accelerate the electric life aging engineering of arc-chutes arcing contact, greatly reduce the development test period.
Description
Technical field
The present invention relates to field of circuit technology, and in particular to a kind of ablation test circuit and breaker arcing contact ablation state
Test method.
Background technique
As the trans-regional networking projects such as China's transferring electricity from the west to the east put into operation successively, high voltage power transmission and transforming network power transmission load increasingly increases
Add, power system capacity constantly increases, and power grid covers region continuous enlargement, continuous in main grid structure increasingly complexity and system impedance
In the case where reduction, once short trouble occurs in route, short circuit current will be more harsh to the examination of breaking capacity of breaker, right
The cumulative effect of breaker arc extinguishing chamber contact should not be underestimated.
According to the statistical result of international conference on large HV electric systems (CIGRE) and China Electric Power Research Institute, circuit breaker electrical endurance
It is the key factor for influencing its service life and operation stability, arcing contact ablation state is the key that determine the arc-chutes service life
One of factor.
Therefore, for repeatedly cut-off line fault electric current and frequently open and close capacitive, inductive load breaker, need to mention
A kind of effective test analysis method out detects in the case where not disintegrating arc-chutes and assesses the ablation shape of arc-chutes arcing contact
State.
Summary of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, a kind of ablation test circuit is provided, in favor of inspection
Survey and assess the ablation state of arc-chutes arcing contact.
To achieve the above object, the technical scheme is that
A kind of ablation test circuit, generate circuit including the short circuit current that is sequentially connected, short circuit current introduces circuit and
Transient recovery voltage cut-offs circuit；Wherein,
The short circuit current generates circuit for generating short circuit current；
It includes portable protective gaps, experimental prototype, transformer, first resistor, first capacitor, electricity that the short circuit current, which introduces circuit,
It presses measuring instrument, current measuring instrument and prolongs arc circuit；The primary side and short circuit current of the transformer generate the output end in circuit
It is connected, the both ends of secondary side are connected with first resistor with first capacitor respectively, and first resistor is mutually concatenated with first capacitor, protect
Shield gap is attempted by between secondary side and first resistor and first capacitor mutually concatenate；In one end of Circuit Fault on Secondary Transformer and the first electricity
Pressure measuring instrument is serially connected between resistance；Prolong arc circuit and is attempted by the both ends that first resistor is mutually concatenated with first capacitor；Experimental prototype
It is serially connected in short circuit current to be introduced into one end of loop output, the short circuit current of that one end introduces the defeated of circuit where experimental prototype
Pressure measuring instrument is also serially connected between outlet and experimental prototype；Current measuring instrument is serially connected in experimental prototype and prolongs between arc circuit；
It includes subject breaker, spark gap, second resistance, the second capacitor, that the transient recovery voltage, which cut-offs circuit,
Three capacitors and the second reactor；The both ends that the both ends for being tested breaker introduce loop output with short circuit current respectively are connected
It connects；The both ends of subject breaker are attempted by after second resistance and the second capacitance series；The both ends of second reactor and second resistance
It is connected with the both ends after the second capacitance series；It is gone here and there between that one end that one end of the second reactor and second resistance are connected
It is connected to third capacitor and spark gap.
It includes short-circuit power supply, Operation switch and the first reactor that the short circuit current, which generates circuit,；Operation switch connection
At the both ends of short-circuit power supply, the first reactor is serially connected in short circuit current and generates in one end of loop output.
The experimental prototype is auxiliary circuit breaker.
The short circuit power supply is short-circuit generator.
Correspondingly, the present invention also provides breaker arcing contact ablation state test method, this method uses above-mentioned burning
Corrosion test circuit carries out, and specifically comprises the following steps:
Dynamic electric resistor test is carried out, before experimental prototype carries out capacity switching test, in test and after test, is moved
State resistance measurement simultaneously records, while recording the energy of accumulation breaker folding；
Disassembly experiment model machine measures the port sizes and pts wt of dynamic and static arcing contact；
When the effective contact displacement L of arcing contact is in the section of 0~5mm, average contact resistance is with effective contact displacement
Increase and be in rapid decrease trend, contact displacement is greater than after 5mm, and average contact resistance variation gradually tends to be steady, their pass
It is that formula is
Before carrying out dynamic electric resistor test further include:
Breaker is divided slowly, slow closing operation, to confirm motion smoothing, without catching phenomenon；
It connects mechanic character tester and carries out testing mechanical characteristic.
Compared with prior art, the present invention the beneficial effect is that:
1, the short circuit that this ablation test circuit provides short circuit current wave feature and electric system actual motion circuit occurs
Fault current is close, equivalence with higher.
2, it can provide the short circuit current of any amplitude, arcing time by this ablation test circuit, accelerate the touching of arc-chutes arc
The electric life aging engineering of head greatly reduces the development test period.
Detailed description of the invention
Fig. 1 is the circuit diagram in ablation test circuit provided in an embodiment of the present invention；
Fig. 2 is that contact action stroke and dynamic contact resistance relational graph are schemed according to test order measurement.
Specific embodiment
The contents of the present invention are described in further details with reference to the accompanying drawings and detailed description.
In this application, 4 key feature parameters of arcing contact state are carried out defined below:
1) the effective contact condition of arcing contact: during the divide-shut brake of breaker, when arcing contact contact resistance is less than or waits
Think that arcing contact belongs to effective contact condition when a certain threshold values (measured value that the value can refer to dynamic contact resistance provides), when
Contact resistance thinks that arcing contact belongs to invalid contact when being greater than the value, be discrete state (not absolutely separation, but for convenience
Data analysis).Test current reaches 2000A or more when due to dynamic electric resistor test, when arcing contact metal absolutely separates, can go out
Existing of short duration phenomenon of arc discharge, absolutely separate when by means of testing using contact resistance infinity as contact the moment be it is inaccurate,
Therefore the application defines certain threshold value as arcing contact contact edge edge value, only for facilitating test data trend analysis.
2) effectively contact displacement L (mm): during the divide-shut brake of breaker, after main contact just separates, arcing contact contact
Resistance is less than or equal to contact displacement corresponding when threshold value (2000 μ Ω), referred to as effective contact displacement.
3) contact resistance Raccu (μ Ω * mm) is accumulated: the accumulation of sampling instant contact resistance corresponding to effective contact displacement
Value.Test apparatus sample rate is 20k, i.e., every 0.05ms obtains corresponding contact resistance value, to effective contact displacement curve ranges
Interior contact resistance is integrated, and contact resistance μ Ω * mm can must be accumulated.
4) average contact resistance Rave (μ Ω/mm): accumulation contact resistance can obtain mean exposure divided by effective contact displacement
Resistance μ Ω/mm can preferably embody the situation of change of contact resistance and effective contact displacement after contact ablation.
Embodiment:
As shown in fig.1, ablation test circuit provided in this embodiment, the short circuit current including being sequentially connected generates circuit
100, short circuit current introduces circuit 200 and transient recovery voltage cut-offs circuit 300.
Wherein, which generates circuit for generating short circuit current, including short-circuit power supply G, Operation switch MB and
First reactor L1；Operation switch MB is connected to the both ends of short-circuit power supply G, and when original state, Operation switch MB is in normally opened shape
State, Operation switch MB can generate short circuit current and be transmitted to short circuit current and be introduced into circuit 200 when being closed, simultaneously because first
Reactor L1 is to be serially connected in short circuit current to generate in one end of 100 output end of circuit, can be under the action of the first reactor L1
Effectively inhibit generated dash current (surge current) when Operation switch MB closes a floodgate.
And it then includes portable protective gaps GP, experimental prototype AB, transformer PT, first resistor that the short circuit current, which introduces circuit 200,
R1, first capacitor C1, pressure measuring instrument V, current measuring instrument I and prolong arc circuit APC.Wherein, the primary side of transformer PT
With short circuit current generate circuit 100 output end be connected, the both ends of secondary side respectively with first resistor R1 and first capacitor C1
It is connected, first resistor R1 and first capacitor phase C1 concatenation, portable protective gaps GP are attempted by secondary side and first resistor R1 and first
Between capacitor C1 phase concatenates；It is serially connected with pressure measuring instrument V between one end and first resistor R1 of transformer PT secondary side, to survey
Measure the voltage of end over the ground；Prolong arc circuit APC and is attempted by the both ends that first resistor R1 is concatenated with first capacitor C1 phase；Experimental prototype
AB is serially connected in short circuit current and is introduced into one end of 200 output end of circuit, and the short circuit current of that one end introduces where experimental prototype AB
Pressure measuring instrument V is also serially connected between the output end and experimental prototype AB in circuit 200；Current measuring instrument I is serially connected in experimental prototype
AB and prolong between the APC of arc circuit.
Electricity since arc-extinguishing chamber of circuit breaker arcing contact ablation degree is mainly determined by the current amplitude in circuit, with circuit offer
Pressure amplitude value size is unrelated, if tried for the effect of equivalent system short circuit current using the voltage rating and electric current of system
It tests, the place capacity in laboratory will be very big, and it is at high cost, therefore, in order to which low cost, high efficiency complete arc-chutes arcing contact difference
Electric current, voltage in test loop is introduced circuit and voltage introducing circuit reality by electric current respectively by the ablation test of degree
It is existing, in which:
1, short circuit current introduces circuit and obtains short circuit current from short circuit current generation circuit 100, shakes circuit by LC and obtains
To the current amplitude of target, the arcing time that arcing contact cut-offs short circuit current is controlled by prolonging arc circuit；
2, transient recovery voltage cut-offs circuit by time synchronization control device, introduces the short of circuit generation in short circuit current
It is before current over-zero that the transient recovery voltage time is disconnected in subject when road electric current flows through experimental prototype AB and subject breaker TB
The both ends of road device TB separate in TB arcing contact and complete after circuit breaker current cut-offs, while can examine TB arc-chutes insulation recovery
Ability.
3, by, by the separation in introducing circuit, can be realized simultaneously the arc touching of experimental prototype AB to test voltage, electric current
On the one hand head ablation test research and the short circuit current switching test for being tested breaker TB highly improve test efficiency,
In addition, also having apparent effect to the control of experimentation cost.
And it includes subject breaker TB, spark gap GP, second resistance R2, that the transient recovery voltage, which cut-offs circuit 300,
Two capacitor C2, third capacitor C3 and the second reactor L2；The both ends for being tested breaker TB introduce circuit with short circuit current respectively
The both ends of 200 output ends are connected；The both ends of subject breaker TB are attempted by after second resistance R2 and the second capacitor C2 concatenation；The
The both ends of two reactor L2 are connected with second resistance 42 with the both ends after the second capacitor C2 concatenation；The one of the second reactor L2
Third capacitor C3 and spark gap GP are serially connected between that one end that end and second resistance R2 are connected.
Before test, experimental prototype AB and subject breaker TB are all in closing position.Operation switch MB closure makes short-circuit electricity
The short circuit current i that source G is providedgFlow through two breakers (experimental prototype AB and subject breaker TB).In moment t0Experimental prototype AB
It is separated with subject breaker TB contact, this time delay arc circuit APC makes the arcing time of experimental prototype AB be fixed on tarcIt (can be in 5ms
Selected between~15ms), in moment t1, spark gap GP igniting, the preceding voltage source main capacitor group C for having charged electricity of test3It is logical
Cross reactor L2Electric discharge introduces high-frequency current iv, and with short circuit current igSuperposition.It is right since the driving voltage of current source is at a fairly low
It is only subjected to contact for experimental prototype AB and has just divided the ablation of rear power frequency short circuit current electric arc, and is tested breaker TB in t2When
Cut-off short circuit current (i quarterg+iv) after, fracture be also subjected to voltage circuit offer by parameter C2、R2、C3And L2What is controlled is temporary
The effect of state recovery voltage.Therefore, two breakers undergo the following two stage respectively:
(1)t0~t1Moment, experimental prototype AB cut-off short circuit current ig, arcing time tarc。
(2)t1~t2Moment, subject breaker TB cut-off short circuit current (ig+iv)。
In this testing program, experimental prototype cut-offs amplitude of short circuit and is mainly distributed within the scope of 20kA~63kA, arcing
Time keeps tarcIt is constant.
It follows that can be had the effect that by using ablation test circuit provided in this embodiment
1, the short circuit event that ablation test circuit provides short circuit current wave feature and electric system actual motion circuit occurs
It is close to hinder electric current, equivalence with higher.
2, it can provide the short circuit current of any amplitude, arcing time by test loop, accelerate the electricity of arc-chutes arcing contact
Service life aging engineering greatly reduces the development test period.
Specifically, it is short-circuit generator that above-mentioned short-circuit power supply, which is short-circuit generator,.
Correspondingly, the present embodiment additionally provides breaker arcing contact ablation state test method, and this method is adopted
It is carried out, is specifically comprised the following steps: with above-mentioned ablation test circuit
Dynamic electric resistor test is carried out, before experimental prototype carries out capacity switching test, in test and after test, is moved
State resistance measurement simultaneously records, while recording the energy of accumulation breaker folding:
| TestDate | For the first time | Second | For the third time | N-th | Accumulation |
| Model machine drop-out current kA | 0 | ||||
| Energy ∑ I is cut-off in accumulation2*tarc | 0 | ||||
| Drop-out current kA* open and close times | 0 |
Disassembly experiment model machine measures the port sizes and pts wt of dynamic and static arcing contact；
Test front and back weight change (unit: g)
Test front and back arcing contact change in size (unit: mm)
When the effective contact displacement L of arcing contact is in the section of 0~5mm, average contact resistance is with effective contact displacement
Increase and be in rapid decrease trend, contact displacement is greater than after 5mm, and average contact resistance variation gradually tends to be steady, their pass
It is that formula is
Preferably, before carrying out dynamic electric resistor test further include:
Breaker is divided slowly, slow closing operation, to confirm motion smoothing, without catching phenomenon；Breaker is connected mechanical
Characteristic tester carries out testing mechanical characteristic.
The test of dynamic electric resistor is during breaker open operation, has just divided separation at the time of main contact just separates to arcing contact
Among moment, the resistance of arcing contact contact is with actuating length and the dynamic changing curve of time, to the machine of breaker itself
Tool action stability and components contact reliability have higher requirement, firstly, by divide slowly, slow closing operation, avoid moving
There is bite phenomenon as process, cause breaker dynamic electric resistor conjunction divide in operating process can not normal separating brake, combined floodgate when long
Conducting will lead to supercapacitor overload burning, be tested by the branch wire time that mechanical property instrument carries out breaker, it is ensured that disconnected
The acting characteristic of road device avoids the reading data for influencing dynamic electric resistor and the analysis of subsequent data in acceptability limit.
Application case
By taking certain 500kV breaker as an example, survey as follows:
Test front and back weight change (unit: g)
Test front and back arcing contact change in size (unit: mm)
Model machine drop-out current kA
Respectively by the contact action stroke and dynamic contact resistance relational graph of testing process breaker A fracture according to test time
Sequence measurement as shown in Fig. 2, from Figure 2 it can be seen that with test accumulation drop-out current energy increase, the effective contacting travel of arcing contact by
Tapered short, contact resistance value stable time in certain threshold range is shorter, and per stroke is flat under same stroke
Equal contact resistance value is higher.
It follows that the effective contact displacement of arcing contact of breaker, arcing contact accumulation contact can be obtained by this method
Resistance and arcing contact average contact resistance can be the operation management of live line-breaker and the arc touching of non-dismount arc-extinguishing chamber
Head status assessment provides foundation.
Simply to illustrate that technical concepts and features of the invention, its purpose is allows in the art above-described embodiment
Those of ordinary skill cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all
It is the equivalent changes or modifications that the essence of content according to the present invention is made, should be covered by the scope of protection of the present invention.
Claims (6)
1. a kind of ablation test circuit, which is characterized in that the short circuit current including being sequentially connected generates circuit, short circuit current introduces
Circuit and transient recovery voltage cut-off circuit；Wherein,
The short circuit current generates circuit for generating short circuit current；
It includes portable protective gaps, experimental prototype, transformer, first resistor, first capacitor, voltage survey that the short circuit current, which introduces circuit,
It measures instrument, current measuring instrument and prolongs arc circuit；The primary side of the transformer is connected with the output end that short circuit current generates circuit
It connects, the both ends of secondary side are connected with first resistor with first capacitor respectively, and first resistor is mutually concatenated with first capacitor, between protection
Gap is attempted by between secondary side and first resistor and first capacitor mutually concatenate；One end of Circuit Fault on Secondary Transformer and first resistor it
Between be serially connected with pressure measuring instrument；Prolong arc circuit and is attempted by the both ends that first resistor is mutually concatenated with first capacitor；Experimental prototype concatenation
In one end that short circuit current is introduced into loop output, the short circuit current of that one end introduces the output end in circuit where experimental prototype
Pressure measuring instrument is also serially connected between experimental prototype；Current measuring instrument is serially connected in experimental prototype and prolongs between arc circuit；
It includes subject breaker, spark gap, second resistance, the second capacitor, third electricity that the transient recovery voltage, which cut-offs circuit,
Appearance and the second reactor；The both ends that the both ends for being tested breaker introduce loop output with short circuit current respectively are connected；The
The both ends of subject breaker are attempted by after two resistance and the second capacitance series；The both ends of second reactor and second resistance and second
Both ends after capacitance series are connected；Is serially connected between that one end that one end of the second reactor and second resistance are connected
Three capacitors and spark gap.
2. ablation test circuit as described in claim 1, which is characterized in that it includes short circuit electricity that the short circuit current, which generates circuit,
Source, Operation switch and the first reactor；Operation switch is connected to the both ends of short-circuit power supply, and the first reactor is serially connected in short-circuit electricity
In one end of the raw loop output of miscarriage.
3. ablation test circuit as claimed in claim 1 or 2, which is characterized in that the experimental prototype is auxiliary circuit breaker.
4. ablation test circuit as claimed in claim 2, which is characterized in that the short circuit power supply is short-circuit generator.
5. breaker arcing contact ablation state test method, the method using ablation test circuit described in claim 1 into
Row characterized by comprising
Dynamic electric resistor test is carried out, before experimental prototype carries out capacity switching test, in test and after test, carries out dynamic electric
Resistance measures and records, while recording the energy of accumulation breaker folding；
Disassembly experiment model machine measures the port sizes and pts wt of dynamic and static arcing contact；
When the effective contact displacement L of arcing contact is in the section of 0~5mm, average contact resistance with effective contact displacement increase
And it is in rapid decrease trend, effective contact displacement is greater than after 5mm, and average contact resistance variation gradually tends to be steady, their pass
It is that formula is
6. breaker arcing contact ablation state test method as claimed in claim 5, which is characterized in that carrying out dynamic electric resistor
Before test further include:
Breaker is divided slowly, slow closing operation, to confirm motion smoothing, without catching phenomenon；
Testing mechanical characteristic is carried out to breaker connection mechanic character tester.
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| CN201811089503.5A CN109254242B (en) | 2018-09-18 | 2018-09-18 | Ablation test loop and method for testing ablation state of arc contact of circuit breaker |
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|---|---|---|---|
| CN201811089503.5A CN109254242B (en) | 2018-09-18 | 2018-09-18 | Ablation test loop and method for testing ablation state of arc contact of circuit breaker |
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| CN109254242B CN109254242B (en) | 2023-09-26 |
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Cited By (6)
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| CN110376516A (en) * | 2019-07-10 | 2019-10-25 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of DC high-speed switch inside arcing resistance test method |
| CN110376514A (en) * | 2019-07-10 | 2019-10-25 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of DC high-speed switch synthetic performance evaluation method |
| CN110376513A (en) * | 2019-07-10 | 2019-10-25 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of DC high-speed switch inside arcing resistance test circuit |
| CN110933792A (en) * | 2019-12-04 | 2020-03-27 | 国网湖南省电力有限公司 | Transformer fire-extinguishing true test insulating oil heating system and method |
| CN114062909A (en) * | 2021-07-12 | 2022-02-18 | 中国电力科学研究院有限公司 | Direct-current large-current through-flow test loop for triggering gap switch |
| CN114895178A (en) * | 2022-05-17 | 2022-08-12 | 安徽一天电气技术股份有限公司 | Circuit breaker testing system and method |
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| CN110376516A (en) * | 2019-07-10 | 2019-10-25 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of DC high-speed switch inside arcing resistance test method |
| CN110376514A (en) * | 2019-07-10 | 2019-10-25 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of DC high-speed switch synthetic performance evaluation method |
| CN110376513A (en) * | 2019-07-10 | 2019-10-25 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of DC high-speed switch inside arcing resistance test circuit |
| WO2021003774A1 (en) * | 2019-07-10 | 2021-01-14 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Method for evaluating comprehensive performance of direct current high-speed switch |
| WO2021003775A1 (en) * | 2019-07-10 | 2021-01-14 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Method for testing internal-arcing-resistance capability of direct-current high-speed switch |
| CN110933792A (en) * | 2019-12-04 | 2020-03-27 | 国网湖南省电力有限公司 | Transformer fire-extinguishing true test insulating oil heating system and method |
| CN110933792B (en) * | 2019-12-04 | 2022-03-08 | 国网湖南省电力有限公司 | Transformer fire-extinguishing true test insulating oil heating system and method |
| CN114062909A (en) * | 2021-07-12 | 2022-02-18 | 中国电力科学研究院有限公司 | Direct-current large-current through-flow test loop for triggering gap switch |
| CN114062909B (en) * | 2021-07-12 | 2023-12-01 | 中国电力科学研究院有限公司 | Direct-current high-current through-current test loop for triggering gap switch |
| CN114895178A (en) * | 2022-05-17 | 2022-08-12 | 安徽一天电气技术股份有限公司 | Circuit breaker testing system and method |
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