CN103558545A - Device and method for detecting on-off prebreakdown time of breaker - Google Patents

Device and method for detecting on-off prebreakdown time of breaker Download PDF

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CN103558545A
CN103558545A CN201310579139.1A CN201310579139A CN103558545A CN 103558545 A CN103558545 A CN 103558545A CN 201310579139 A CN201310579139 A CN 201310579139A CN 103558545 A CN103558545 A CN 103558545A
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voltage
data
breaker closing
modulate circuit
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CN103558545B (en
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林莘
王亮
王飞鸣
吴冠男
曹辰
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Shenyang University of Technology
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Abstract

The invention provides a device and method for detecting on-off prebreakdown time of a breaker, and belongs to the technical field of breakers. According to the method, simple devices are used, and online detection of the prebreakdown time can be achieved through the modern signal processing technology only according to recording data of voltages obtained before and after the breaker is turned off. The device and the method have the advantages of being high in reliability, high in accuracy, high in speed, low in cost, good in economical efficiency and the like.

Description

A kind of isolating switch closes pre arcing time pick-up unit and method
Technical field
The invention belongs to breaker technical field, be specifically related to a kind of isolating switch and close pre arcing time pick-up unit and method.
Background technology
Primary cut-out is cut-offfing, is closing in process, can cause arcing contact, the wearing and tearing of spout ablated surface under arc energy and mechanical motion effect, even produces deformation, directly affects isolating switch break performance and closes and estimate to wear characteristic.Special switch especially for reactive-load compensation equipment in electric system, not only to guarantee the success that Short-Circuit High Current is cut-off, also to meet the requirement that 3000 to 5000 times specified little electric current cut-offs, close and shove very greatly on the impact of isolating switch life-span on contact ablation greatly in process, so the rational pre arcing time detection method of isolating switch is the key link that guarantees electrical endurance Accurate Prediction.The at present online detection to the important parameter-pre arcing time of isolating switch, exists that reliability is not high, complicated operation and the shortcoming such as be easily disturbed.
Summary of the invention
For the deficiencies in the prior art, the present invention proposes a kind of isolating switch and closes pre arcing time pick-up unit and method, to reach the object that improves detection speed, improves reliability, reduces costs.
Close a pre arcing time pick-up unit, this device comprises the first voltage transformer (VT), second voltage mutual inductor, data collector, central processing unit, industrial computer, the first voltage modulate circuit and second voltage modulate circuit, wherein,
The first voltage transformer (VT): for gathering the charged front voltage waveform of breaker closing coil, and collection signal is sent to the first voltage modulate circuit;
Second voltage mutual inductor: for gathering breaker closing process virtual voltage waveform, and collection signal is sent to second voltage modulate circuit;
The first voltage modulate circuit and second voltage modulate circuit: for the signal gathering is carried out to filtering;
Data collector: carry out analog to digital conversion for the voltage signal that the first voltage transformer (VT) and second voltage mutual inductor are gathered, and signal is sent to central processing unit;
Central processing unit:
For determining the sudden change moment of breaker closing process virtual voltage, this time point is prebreakdown starting point;
For breaker closing process virtual voltage data and the charged front voltage data of breaker closing coil are uniformly-spaced gathered, obtain virtual voltage data, single frequency interference wave data in the charged front voltage data of breaker closing coil and the charged front voltage of breaker closing coil, above-mentioned image data is divided into groups respectively, and adopt least square method respectively to the virtual voltage data after grouping, in the charged front voltage data of breaker closing coil and the charged front voltage of breaker closing coil, single frequency interference wave data are carried out matching, in virtual voltage data after matching, delete single frequency interference wave data, obtain filtered virtual voltage data,
Poor for the charged front voltage data of the breaker closing coil after matching and filtered virtual voltage data are done, obtain difference, if certain time point afterwards difference be all less than setting threshold, this time point is prebreakdown end point;
Industrial computer: for recording and showing testing result.
The first described voltage transformer (VT) and second voltage mutual inductor are arranged at respectively on the contact of isolating switch, the output terminal of the first voltage transformer (VT) connects the input end of the first voltage modulate circuit, the output terminal of second voltage mutual inductor connects the input end of second voltage modulate circuit, the output terminal of the output terminal of the first voltage modulate circuit and second voltage modulate circuit is the two-way input end of connection data harvester respectively, the input end of the output terminal central processing unit of data collector, the output terminal of central processing unit connects the input end of industrial computer.
The first described voltage modulate circuit is identical with second voltage modulate circuit structure, and be also connected a resistance and an electric capacity at the input end of the first voltage modulate circuit and the input end of second voltage modulate circuit, one end of this resistance connects the input end of voltage modulate circuit, the resistance other end connects one end of electric capacity, the other end ground connection of electric capacity.
Adopt isolating switch to close the method that pre arcing time pick-up unit detects, comprise the following steps:
Step 1, adopt the first voltage transformer (VT) to gather the charged front voltage waveform of breaker closing coil, adopt second voltage mutual inductor to gather breaker closing process virtual voltage waveform;
Step 2, the voltage signal that the first voltage transformer (VT) and second voltage mutual inductor are gathered carry out filtering and analog to digital conversion;
Step 3, according to virtual voltage data in the breaker closing process gathering, determine the sudden change of virtual voltage data constantly, this time point is prebreakdown starting point;
Step 4, virtual voltage data in breaker closing process and the charged front voltage data of breaker closing coil are uniformly-spaced gathered, obtain single frequency interference wave data in virtual voltage data, the charged front voltage data of breaker closing coil and the charged front voltage of breaker closing coil;
Step 5, above-mentioned image data is divided into groups respectively, specific as follows:
Step 5-1, according to the frequency of single frequency interference wave and sampling interval, determine the group number of grouping;
Step 5-2, according to the sampling location of this sampled point and group number, affiliated group of determining this sampled point; According to affiliated group, the sampling location of this sampled point and group number, determine that this sample is in the position of this group again;
Step 6, employing least square method are carried out matching to virtual voltage data and single frequency interference wave data after grouping respectively, in the virtual voltage data after matching, delete single frequency interference wave data, obtain filtered virtual voltage data;
Step 7, repeatedly perform step 1 to step 6, until all single frequency interference wave data are all removed;
Step 8, the charged front voltage data of the breaker closing coil after matching and filtered virtual voltage data are done poor, obtained difference, if difference is all less than setting threshold after certain time point, this time point is prebreakdown end point;
The isolating switch that time period between step 9, prebreakdown starting point and prebreakdown end point is detection acquisition closes pre arcing time;
Step 10, the isolating switch that detection is obtained close pre arcing time and are sent to industrial computer, if this pre arcing time is greater than setting value, the serious ablation of contact of breaker, needs to change or maintenance isolating switch.
Described in step 5-1, according to the frequency of single frequency interference wave and sampling interval, determine the group number of grouping, formula is as follows:
T N=ceil(1000/f×d t) (1)
Wherein, T nfor packet count; F is the frequency values that single-frequency is disturbed; d tfor sampling interval; Ceil is lower bracket function.
Determining affiliated group of this sampled point and determining that this sample is in the position of this group described in step 5-2, formula is as follows:
k=ceil(i/T N) (2)
j=i-(k-1)T N (3)
Wherein, k represents k group; J represents that after this sampled point grouping be j sampled point of this group; I represents i sampled point.
Advantage of the present invention:
A kind of isolating switch of the present invention closes pre arcing time pick-up unit and method, utilize simple device, only need to utilize the recorder data of voltage before and after isolating switch is closed, use modern signal processing technology, can realize the online detection to pre arcing time, there is higher reliability, accuracy, the advantage such as speed is fast, cost is low, good economy performance.
Accompanying drawing explanation
The single unit system structured flowchart of Fig. 1 an embodiment of the present invention;
The data acquisition module of Fig. 2 an embodiment of the present invention and central processing unit connecting circuit schematic diagram;
The isolating switch pre arcing time of Fig. 3 an embodiment of the present invention detects general flow chart online;
The isolating switch of Fig. 4 an embodiment of the present invention closes each pre arcing time schematic diagram of process;
The voltage waveform of the circuit non-fault standard of Fig. 5 an embodiment of the present invention;
The phase angle that cut-offs of Fig. 6 an embodiment of the present invention is 60 ° of electric currents and matching waveform comparison diagram;
The phase angle that cut-offs of Fig. 7 an embodiment of the present invention is 80 ° of electric currents and matching waveform comparison diagram;
The phase angle that cut-offs of Fig. 8 an embodiment of the present invention is 30 ° of electric currents and matching waveform comparison diagram.
Embodiment
Below in conjunction with accompanying drawing, an embodiment of the present invention is described further.
As shown in Figure 1, a kind of isolating switch closes pre arcing time pick-up unit, and this device comprises the first voltage transformer (VT), second voltage mutual inductor, data collector, central processing unit, industrial computer, the first voltage modulate circuit and second voltage modulate circuit, wherein, the first voltage transformer (VT) is used for gathering the charged front voltage waveform of breaker closing coil, and collection signal is sent to the first voltage modulate circuit, second voltage mutual inductor is used for gathering breaker closing process virtual voltage waveform, and collection signal is sent to second voltage modulate circuit, the first voltage modulate circuit and second voltage modulate circuit are for carrying out filtering to the signal gathering, data collector carries out analog to digital conversion for the voltage signal that the first voltage transformer (VT) and second voltage mutual inductor are gathered, and signal is sent to central processing unit, central processing unit is for determining the sudden change moment of breaker closing process virtual voltage, and this time point is prebreakdown starting point, central processing unit is in addition for uniformly-spaced gathering breaker closing process virtual voltage data and the charged front voltage data of breaker closing coil, obtain virtual voltage data, single frequency interference wave data in the charged front voltage data of breaker closing coil and the charged front voltage of breaker closing coil, above-mentioned image data is divided into groups respectively, and adopt least square method respectively to the virtual voltage data after grouping, in the charged front voltage data of breaker closing coil and the charged front voltage of breaker closing coil, single frequency interference wave data are carried out matching, in virtual voltage data after matching, delete single frequency interference wave data, obtain filtered virtual voltage data, central processing unit is also poor for the charged front voltage data of the breaker closing coil after matching and filtered virtual voltage data are done, and obtains difference, if difference is all less than setting threshold after certain time point, this time point is prebreakdown end point, industrial computer is used for recording and showing testing result.
As shown in Figure 2, in the embodiment of the present invention, the ZW27-17 model of Selection of Circuit Breakers vacuum 10kV; The first voltage transformer (VT) and second voltage mutual inductor are all selected JDG4-0.5100000/100 model; The first voltage modulate circuit and second voltage modulate circuit connected mode provide in Fig. 2; Data collector is selected TLC254312 bits serial A/D converter of TI company; Central processing unit adopts 51 single-chip microcomputers, and selecting model is STC89C51, and industrial computer adopts UNO-3072 Series P entium M/Celeron M built-in industrial control machine; In the present embodiment, adopt translation circuit to carry out level and logical relation conversion, translation circuit is selected the chip MAX232 of a compatible RS232 standard of being released by Texas Instruments (TI); Wherein, the first voltage transformer (VT) and second voltage mutual inductor are arranged at respectively on the contact of isolating switch, the output terminal of the output terminal of the first voltage transformer (VT) and second voltage mutual inductor is connected respectively input end IN1, the IN2 of voltage modulate circuit, the embodiment of the present invention is improved voltage modulate circuit, at voltage modulate circuit input end, 100 Ω resistance and 0.22 μ F capacitance series device are set separately, mainly will gather the filtering of voltage signal HFS, this device is the key that subsequent conditioning circuit is realized single frequency interference wave filtering.In addition, in voltage modulate circuit inside, add Q1 silicon-controlled device, make modulate circuit output voltage more stable, more reliable to subsequent conditioning circuit protection.Voltage modulate circuit output terminal is input end AIN0, the AIN1 of connection data harvester TLC2543 respectively, output terminal EOC, the CLK of data collector TLC2543, DIN, DOUT connect respectively the P10 of 51 single-chip microcomputers, P11, P12, P13, P14 pin, 10 pins (RXD), 11 pins (TXD) of single-chip microcomputer STC89C51 be connected with 10 pins (T2in) with 9 pins (R2out) of translation circuit MAX232, the input end of industrial computer is connected with single-chip microcomputer output terminal.The voltage signal acquisition device of isolating switch carries out synchronized sampling, maintenance, A/D and converts digital signal to, sends into calculating and data processing that single-chip microcomputer is classified, and data are delivered to host computer.
Adopt isolating switch to close the method that pre arcing time pick-up unit detects, method flow diagram as shown in Figure 3, comprises the following steps:
Step 1, adopt the first voltage transformer (VT) to gather the charged front voltage waveform of breaker closing coil, adopt second voltage mutual inductor to gather breaker closing process virtual voltage waveform;
In the embodiment of the present invention, Fig. 4 is that isolating switch closes time diagram, as shown in the figure, gathers the charged three-phase voltage waveform of breaker closing coil, and for the prediction of making process voltage waveform, voltage waveform is that the 50Hz that contains single frequency interference wave is sinusoidal wave.Gather breaker coil charged rear to the three-phase voltage measured waveform that closed a floodgate, as shown in Figure 5, measured waveform is used for and prediction comparison of wave shape;
Step 2, the voltage signal that the first voltage transformer (VT) and second voltage mutual inductor are gathered carry out filtering and analog to digital conversion;
Step 3, according to virtual voltage data in the breaker closing process gathering, determine the sudden change of virtual voltage data constantly, this time point is prebreakdown starting point;
Step 4, virtual voltage data in breaker closing process and the charged front voltage data of breaker closing coil are uniformly-spaced gathered, obtain single frequency interference wave data in virtual voltage data, the charged front voltage data of breaker closing coil and the charged front voltage of breaker closing coil;
Individual in the embodiment of the present invention, in time domain, the cycle interval of the single frequency interference wave comprising according to voltage data, resamples to it;
Step 5, above-mentioned image data is divided into groups respectively, specific as follows:
Step 5-1, according to the frequency of single frequency interference wave and sampling interval, determine the group number of grouping;
In the embodiment of the present invention, described grouping is according to containing single frequency interference wave voltage data (f=50Hz, d t=4ms), cycle interval resamples, and primary voltage data are divided into T ngroup, formula is as follows:
T N=ceil(1000/f×d t) (1)
Wherein, T nfor packet count; The frequency values that f (Hz) disturbs for single-frequency; d t(ms) be sampling interval; Ceil is lower bracket function, gets the integer that descends most that is not less than this value;
Step 5-2, according to the sampling location of this sampled point and group number, affiliated group of determining this sampled point; According to affiliated group, the sampling location of this sampled point and group number, determine that this sample is in the position of this group again;
Formula is as follows:
k=ceil(i/T N) (2)
j=i-(k-1)T N (3)
Wherein, k represents k group; J represents that after this sampled point grouping be j sampled point of this group; I represents i sampled point;
In the embodiment of the present invention, a voltage wave cycle 20ms is carried out to data sampling grouping, sampling interval is 4ms, obtains 5 groups of integrated datas:
When sampled point is the 1st during to the 5th sampled point, i=1～5 o'clock, are divided into the 1st to the 5th sampled point in the 1st group, i.e. k=1, j=1～5; First group of data 0ms rises and starts sampling; When sampled point is the 6th during to the 10th sampled point, i=6～10, are divided into the 1st to the 5th sampled point in the 2nd group, i.e. k=2, j=1～5; Second group of data 4ms rises and starts sampling; When sampled point is the 11st during to the 15th sampled point, i=11～15, are divided into the 1st to the 5th sampled point in the 3rd group, i.e. k=3, j=1～5; The 3rd group of data 8ms rises and starts sampling; When sampled point is the 16th during to the 20th sampled point, i=16～20, are divided into the 1st to the 5th sampled point in the 4th group, i.e. k=4, j=1～5; The 4th group of data 12ms rises and starts sampling; When sampled point is the 21st during to the 25th sampled point, i=21～25, are divided into the 1st to the 5th sampled point in the 5th group, i.e. k=5, j=1～5; The 5th group of data 16ms rises and starts sampling;
Step 6, employing least square method are carried out matching to virtual voltage data and single frequency interference wave data after grouping respectively, in the virtual voltage data after matching, delete single frequency interference wave data, obtain filtered virtual voltage data;
In the embodiment of the present invention, adopt straight line formula to carry out least square fitting, formula is as follows:
n i(t)=at+b (4)
Wherein: n i(t) single frequency interference wave for simulating, (i=1,2 ..., T n), a and b are coefficient to be asked;
By following objective function, ask for:
g i ( t ) = Σ t = 1 [ x i ( t ) - n i ( t ) ] 2 = Σ t = 1 [ x i ( t ) - ( at + b ) ] 2 - - - ( 5 )
Wherein, g i(t) represent " the optimization criterion " of the quadratic sum minimum of each sampled point deviation; x i(t) be the virtual voltage data waveform after matching, (i=0,1,2 ..., T n);
Meanwhile, formula (5) requirement that meets the following conditions:
∂ g i ( t ) ∂ a = 0 - - - ( 6 )
∂ g i ( t ) ∂ b = 0 - - - ( 7 )
Formula (5), (6), (7) simultaneous are become to system of equations, and solve this system of equations:
g ( t ) = Σ t = 1 [ x i ( t ) - n i ( t ) ] 2 = Σ t = 1 [ x i ( t ) - ( at + b ) ] 2 ∂ g i ( t ) ∂ a = 0 ∂ g i ( t ) ∂ b = 0 - - - ( 8 )
Solve and obtain coefficient a and b, bringing formula (4) into can be in the hope of the single frequency interference wave n simulating i(t);
x i ( t ) ‾ = x i ( t ) - n i ( t ) = x i ( t ) - ( at + b ) - - - ( 9 )
Wherein,
Figure BDA0000415776660000073
after removing single frequency interference wave, obtain filtered virtual voltage data, (i=1,2 ..., T n);
Removal data method is: in i=1～5, and k=1, j=1～5; I=6～10, k=2, j=1～5; I=11～15, k=3, j=1～5; I=16～20, k=4, j=1～5; I=21～25, k=5, j=1～5; In grouping, corresponding 25 sampled point virtual voltage data deduct the single frequency interference wave data of corresponding point matching successively.
Step 7, repeatedly perform step 1 to step 6, until all single frequency interference wave data are all removed;
Step 8, by the charged front voltage data of the breaker closing coil after matching and filtered virtual voltage data
Figure BDA0000415776660000074
it is poor to do, and obtains difference, if difference is all less than setting threshold after certain time point, this time point is prebreakdown end point;
Threshold value is got 10% of voltage peak size.Record this time data return data, solid line waveform in Fig. 6～Fig. 8 be respectively a phase wherein close phase angle be 60 °, 80 °, 30 ° close virtual voltage waveform, dotted line is that closing coil simulates voltage waveform before charged, in figure, virtual voltage rises suddenly and is constantly pre arcing time starting point, virtual voltage approaches and is prebreakdown end point when consistent with simulating voltage waveform, and criterion is less than voltage peak 10% for its voltage difference.
The isolating switch that time period between step 9, prebreakdown starting point and prebreakdown end point is detection acquisition closes pre arcing time;
Step 10, the isolating switch that detection is obtained close pre arcing time and are sent to industrial computer, if this pre arcing time is greater than setting value, the serious ablation of contact of breaker, needs to change or maintenance isolating switch.
In the embodiment of the present invention, result of calculation is passed to industrial computer by RS232 serial line interface, carry out real-time online detection, when detection pre arcing time is greater than 3ms, can judge that contact of breaker ablation is serious, need to safeguard that even changing isolating switch avoids failure of interruption accident to occur to isolating switch.

Claims (6)

1. an isolating switch closes pre arcing time pick-up unit, it is characterized in that, this device comprises the first voltage transformer (VT), second voltage mutual inductor, data collector, central processing unit, industrial computer, the first voltage modulate circuit and second voltage modulate circuit, wherein
The first voltage transformer (VT): for gathering the charged front voltage waveform of breaker closing coil, and collection signal is sent to the first voltage modulate circuit;
Second voltage mutual inductor: for gathering breaker closing process virtual voltage waveform, and collection signal is sent to second voltage modulate circuit;
The first voltage modulate circuit and second voltage modulate circuit: for the signal gathering is carried out to filtering;
Data collector: carry out analog to digital conversion for the voltage signal that the first voltage transformer (VT) and second voltage mutual inductor are gathered, and signal is sent to central processing unit;
Central processing unit:
For determining the sudden change moment of breaker closing process virtual voltage, this time point is prebreakdown starting point;
For breaker closing process virtual voltage data and the charged front voltage data of breaker closing coil are uniformly-spaced gathered, obtain virtual voltage data, single frequency interference wave data in the charged front voltage data of breaker closing coil and the charged front voltage of breaker closing coil, above-mentioned image data is divided into groups respectively, and adopt least square method respectively to the virtual voltage data after grouping, in the charged front voltage data of breaker closing coil and the charged front voltage of breaker closing coil, single frequency interference wave data are carried out matching, in virtual voltage data after matching, delete single frequency interference wave data, obtain filtered virtual voltage data,
Poor for the charged front voltage data of the breaker closing coil after matching and filtered virtual voltage data are done, obtain difference, if certain time point afterwards difference be all less than setting threshold, this time point is prebreakdown end point;
Industrial computer: for recording and showing testing result.
2. isolating switch according to claim 1 closes pre arcing time pick-up unit, it is characterized in that, the first described voltage transformer (VT) and second voltage mutual inductor are arranged at respectively on the contact of isolating switch, the output terminal of the first voltage transformer (VT) connects the input end of the first voltage modulate circuit, the output terminal of second voltage mutual inductor connects the input end of second voltage modulate circuit, the output terminal of the output terminal of the first voltage modulate circuit and second voltage modulate circuit is the two-way input end of connection data harvester respectively, the input end of the output terminal central processing unit of data collector, the output terminal of central processing unit connects the input end of industrial computer.
3. isolating switch according to claim 1 closes pre arcing time pick-up unit, it is characterized in that, the first described voltage modulate circuit is identical with second voltage modulate circuit structure, and be also connected a resistance and an electric capacity at the input end of the first voltage modulate circuit and the input end of second voltage modulate circuit, one end of this resistance connects the input end of voltage modulate circuit, the resistance other end connects one end of electric capacity, the other end ground connection of electric capacity.
4. adopt isolating switch claimed in claim 1 to close the method that pre arcing time pick-up unit detects, it is characterized in that, comprise the following steps:
Step 1, adopt the first voltage transformer (VT) to gather the charged front voltage waveform of breaker closing coil, adopt second voltage mutual inductor to gather breaker closing process virtual voltage waveform;
Step 2, the voltage signal that the first voltage transformer (VT) and second voltage mutual inductor are gathered carry out filtering and analog to digital conversion;
Step 3, according to virtual voltage data in the breaker closing process gathering, determine the sudden change of virtual voltage data constantly, this time point is prebreakdown starting point;
Step 4, virtual voltage data in breaker closing process and the charged front voltage data of breaker closing coil are uniformly-spaced gathered, obtain single frequency interference wave data in virtual voltage data, the charged front voltage data of breaker closing coil and the charged front voltage of breaker closing coil;
Step 5, above-mentioned image data is divided into groups respectively, specific as follows:
Step 5-1, according to the frequency of single frequency interference wave and sampling interval, determine the group number of grouping;
Step 5-2, according to the sampling location of this sampled point and group number, affiliated group of determining this sampled point; According to affiliated group, the sampling location of this sampled point and group number, determine that this sample is in the position of this group again;
Step 6, employing least square method are carried out matching to virtual voltage data and single frequency interference wave data after grouping respectively, in the virtual voltage data after matching, delete single frequency interference wave data, obtain filtered virtual voltage data;
Step 7, repeatedly perform step 1 to step 6, until all single frequency interference wave data are all removed;
Step 8, the charged front voltage data of the breaker closing coil after matching and filtered virtual voltage data are done poor, obtained difference, if difference is all less than setting threshold after certain time point, this time point is prebreakdown end point;
The isolating switch that time period between step 9, prebreakdown starting point and prebreakdown end point is detection acquisition closes pre arcing time;
Step 10, the isolating switch that detection is obtained close pre arcing time and are sent to industrial computer, if this pre arcing time is greater than setting value, the serious ablation of contact of breaker, needs to change or maintenance isolating switch.
5. isolating switch according to claim 4 closes the method that pre arcing time pick-up unit detects, it is characterized in that,
Described in step 5-1, according to the frequency of single frequency interference wave and sampling interval, determine the group number of grouping, formula is as follows:
T N=ceil(1000/f×d t) (1)
Wherein, T nfor packet count; F is the frequency values that single-frequency is disturbed; d tfor sampling interval; Ceil is lower bracket function.
6. isolating switch according to claim 4 closes the method that pre arcing time pick-up unit detects, it is characterized in that, and determining affiliated group of this sampled point and determining that this sample is in the position of this group described in step 5-2, formula is as follows:
k=ceil(i/T N) (2)
j=i-(k-1)T N (3)
Wherein, k represents k group; J represents that after this sampled point grouping be j sampled point of this group; I represents i sampled point.
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* Cited by examiner, † Cited by third party
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CN104198928B (en) * 2014-07-11 2017-02-15 清华大学 Circuit breaker contact ablation degree measuring method
CN110736922A (en) * 2019-09-10 2020-01-31 平高集团有限公司 Device and method for measuring closing pre-breakdown time of switches
CN113376515A (en) * 2020-03-09 2021-09-10 西门子股份公司 Method and device for determining closing time of circuit breaker and computer readable medium
CN114252765A (en) * 2021-12-14 2022-03-29 广西电网有限责任公司桂林供电局 SF based on switching-on pre-breakdown6Method for evaluating ablation state of breaker contact

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201477189U (en) * 2009-04-23 2010-05-19 南京因泰莱配电自动化设备有限公司 Device for online detecting mechanical characteristics of 24 kV high-voltage vacuum circuit breaker
CN101825672A (en) * 2010-05-13 2010-09-08 四川电力试验研究院 Phase selection switching-in tester with breaker pre-breakdown model
CN102288905A (en) * 2011-06-27 2011-12-21 中国西电电气股份有限公司 Synthetic closing and opening test circuit used for high-voltage AC (alternating current) circuit breaker
CN102288906A (en) * 2011-07-06 2011-12-21 天津市电力公司 Circuit breaker switching on and off speed precise measurement system
CN202166722U (en) * 2011-07-09 2012-03-14 上海市电力公司 Online monitoring and fault diagnosing system of circuit breaker
CN102411124A (en) * 2011-08-02 2012-04-11 广东威恒输变电工程有限公司 Mechanical property test device for special breaker
CN102565686A (en) * 2011-12-07 2012-07-11 上海工程技术大学 Embedded type intelligent vacuum circuit breaker for real-time monitoring
KR20130003531A (en) * 2011-06-30 2013-01-09 한국전기안전공사 The detection device mounted to circuit breaker and the detection system of the auxiliary power outlet information using it
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
CN102928069A (en) * 2012-10-08 2013-02-13 西安交通大学 System and method for detecting vibration of high-voltage circuit breaker
CN103018664A (en) * 2012-11-23 2013-04-03 安徽省电力公司阜阳供电公司 Equipment for monitoring switching-off and on time of high-voltage circuit breaker on line
CN103068215A (en) * 2013-01-07 2013-04-24 重庆市电力公司市区供电局 Design method for electromagnetic shielding box body of vacuum circuit breaker control circuit board
CN103207369A (en) * 2013-03-20 2013-07-17 中国西电电气股份有限公司 Method for improving accuracy of breaking test data analysis of circuit breaker

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201477189U (en) * 2009-04-23 2010-05-19 南京因泰莱配电自动化设备有限公司 Device for online detecting mechanical characteristics of 24 kV high-voltage vacuum circuit breaker
CN101825672A (en) * 2010-05-13 2010-09-08 四川电力试验研究院 Phase selection switching-in tester with breaker pre-breakdown model
CN102288905A (en) * 2011-06-27 2011-12-21 中国西电电气股份有限公司 Synthetic closing and opening test circuit used for high-voltage AC (alternating current) circuit breaker
KR20130003531A (en) * 2011-06-30 2013-01-09 한국전기안전공사 The detection device mounted to circuit breaker and the detection system of the auxiliary power outlet information using it
CN102288906A (en) * 2011-07-06 2011-12-21 天津市电力公司 Circuit breaker switching on and off speed precise measurement system
CN202166722U (en) * 2011-07-09 2012-03-14 上海市电力公司 Online monitoring and fault diagnosing system of circuit breaker
CN102411124A (en) * 2011-08-02 2012-04-11 广东威恒输变电工程有限公司 Mechanical property test device for special breaker
CN102565686A (en) * 2011-12-07 2012-07-11 上海工程技术大学 Embedded type intelligent vacuum circuit breaker for real-time monitoring
CN102928069A (en) * 2012-10-08 2013-02-13 西安交通大学 System and method for detecting vibration of high-voltage circuit breaker
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
CN103018664A (en) * 2012-11-23 2013-04-03 安徽省电力公司阜阳供电公司 Equipment for monitoring switching-off and on time of high-voltage circuit breaker on line
CN103068215A (en) * 2013-01-07 2013-04-24 重庆市电力公司市区供电局 Design method for electromagnetic shielding box body of vacuum circuit breaker control circuit board
CN103207369A (en) * 2013-03-20 2013-07-17 中国西电电气股份有限公司 Method for improving accuracy of breaking test data analysis of circuit breaker

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
张永斌等: "基于DSP及永磁机构真空断路器的同步分合闸控制装置", 《高压电器》, vol. 45, no. 1, 28 February 2009 (2009-02-28) *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104091056A (en) * 2014-06-27 2014-10-08 上海网正信息科技有限公司 System and method for predicting service life of laboratory equipment
CN104091056B (en) * 2014-06-27 2018-04-17 上海网正信息科技有限公司 A kind of laboratory equipment life forecast system and method
CN104198928B (en) * 2014-07-11 2017-02-15 清华大学 Circuit breaker contact ablation degree measuring method
CN105676118A (en) * 2016-01-08 2016-06-15 镇江华东电力设备制造厂有限公司 Measuring system and measuring method for measuring actuation time of high-voltage circuit breaker of non-load transformer loop
CN105676118B (en) * 2016-01-08 2018-08-28 镇江华东电力设备制造厂有限公司 No-load transformer loop high-voltage breaker actuation time measurement system and measurement method
CN110736922A (en) * 2019-09-10 2020-01-31 平高集团有限公司 Device and method for measuring closing pre-breakdown time of switches
CN110736922B (en) * 2019-09-10 2022-03-29 平高集团有限公司 Device and method for measuring switch-on pre-breakdown time
CN113376515A (en) * 2020-03-09 2021-09-10 西门子股份公司 Method and device for determining closing time of circuit breaker and computer readable medium
CN114252765A (en) * 2021-12-14 2022-03-29 广西电网有限责任公司桂林供电局 SF based on switching-on pre-breakdown6Method for evaluating ablation state of breaker contact

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