CN103995203A - Capacitor steady state online detection system suitable for suppressing collection noise and working method - Google Patents
Capacitor steady state online detection system suitable for suppressing collection noise and working method Download PDFInfo
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- CN103995203A CN103995203A CN201410233873.7A CN201410233873A CN103995203A CN 103995203 A CN103995203 A CN 103995203A CN 201410233873 A CN201410233873 A CN 201410233873A CN 103995203 A CN103995203 A CN 103995203A
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Abstract
The invention relates to a capacitor steady state online detection system suitable for suppressing collection noise and a working method. The system comprises an ultrasonic sensor, a high-frequency current sensor and a data processing control unit, wherein the data processing control unit comprises a noise suppressor, a capacitance calculation module, a capacitance and voltage superposition calculation module and a detected capacitor service life calculation module, noise of sound signals collected by the ultrasonic sensor is suppressed, the data collection accuracy of the ultrasonic sensor is improved, and a capacitor is detected online. The capacitance sound pressure level of the detected capacitor is collected through the ultrasonic sensor, the voltage values of the two ends of the capacitor are collected through the high-frequency current sensor, a capacitance estimation formula is established, the service life of the detected capacitor is predicted through the formula, and the working method is superior to the traditional method according to which the service life of the capacitor is judged simply by detecting the current actual capacitance of the capacitor.
Description
Technical field
The present invention relates to a kind of capacitive detection system, relate in particular to a kind of electric capacity stable state on-line detecting system and method for work that is suitable for suppressing acquisition noise.
Background technology
Power capacitor is of many uses in electric system is one of most important element in electric system, and traditional power capacitor detection is generally power-off off-line has affected production.Existing power capacitor online diagnosing technique of support shaft concentrates on that the measurement testing result of electric capacity dielectric loss angle is lagged behind to generation and the testing result of fault is unsatisfactory, and because to capacitor noise, collection exists a lot of undesired signals, so the judgement of electric capacity also be there will be to corresponding error.
Summary of the invention
The object of this invention is to provide a kind of electric capacity stable state on-line detecting system, first this system has solved the noise technical matters of the voice signal of ultrasonic sensor collection; Next has solved the online technical matters detecting of electric capacity.
In order to solve the problems of the technologies described above, the invention provides a kind of electric capacity stable state on-line detecting system that is suitable for suppressing acquisition noise, comprising:
Ultrasonic sensor, the voice signal producing for gathering measured capacitance, to obtain corresponding capacitance sound pressure level L
px.
High Frequency Current Sensor, for gathering the voltage vector at electric capacity two ends.
Described ultrasonic sensor, High Frequency Current Sensor are connected with data processing and control unit by corresponding data conditioning unit respectively.
Described data processing and control unit, comprising:
Noise suppressor, is suitable for the voice signal of described ultrasonic sensor collection to carry out squelch;
Electric capacity superimposed voltage computing module, is suitable for the voltage vector that gathers the measured capacitance two ends that obtain to decomposite fundamental voltage u
0and nth harmonic component of voltage u (t)
n(t), that is, and the superimposed voltage u (t) at described measured capacitance two ends, i.e. u (t)=u
0(t)+u
n(t), calculate the effective value U of this superimposed voltage, calculate the effective value U of fundamental voltage simultaneously
0.
Electric capacity computing module, sets up electric capacity sound pressure level database, and this database comprises: the electric capacity sound pressure level that all types of electric capacity is corresponding with the effective value that only has each first-harmonic; Default measured capacitance type, rated capacitance C
0, according to the effective value U of measured capacitance type and current fundamental voltage
0from described electric capacity sound pressure level database, obtain corresponding capacitance sound pressure level L
p0; The voice signal producing by measured capacitance, to obtain corresponding capacitance sound pressure level L
px, pass through formula
calculate the actual capacitance C of measured capacitance
x.
Measured capacitance life-span computing module, is suitable for the actual capacitance C according to measured capacitance
xset up electric capacity predictor formula, i.e. C=C with the effective value U of superimposed voltage
x-kUt; Wherein, limit capacitance when C is measured capacitance damage, t is capacitance damage expeced time, k is that interior measured capacitance of unit interval is at the effective value U of current fundamental voltage
0the electric capacitance change coefficient of lower correspondence, that is,
wherein, C
x1and C
x2electric capacity initial value and final value for measured capacitance in the unit interval; And by described electric capacity predictor formula, derive the computing formula of capacitance damage t expeced time,
set described limit capacitance C, the expeced time being damaged to calculate measured capacitance.
On the basis of technique scheme, the present invention also provides a kind of method of work that is suitable for suppressing the electric capacity stable state on-line detecting system of acquisition noise, and this method of work has solved the online technical matters detecting of electric capacity.
Described method of work comprises the steps:
Step 1: gather the voltage vector at measured capacitance two ends, and this voltage vector is decomposited to fundamental voltage u
0and nth harmonic component of voltage u (t)
n(t), that is, and the superimposed voltage u (t) at described measured capacitance two ends, i.e. u (t)=u
0(t)+u
n(t), calculate the effective value U of this superimposed voltage, the effective value U of fundamental voltage
0.
Step 2: set up electric capacity sound pressure level database, this database comprises: the electric capacity sound pressure level that all types of electric capacity is corresponding with the effective value difference that only has each first-harmonic.
Default measured capacitance type, rated capacitance C
0, according to the effective value U of measured capacitance type and current fundamental voltage
0from described electric capacity sound pressure level database, obtain corresponding capacitance sound pressure level L
p0.
Gather the voice signal that measured capacitance produces, to obtain corresponding capacitance sound pressure level L
px, pass through formula
calculate the actual capacitance C of measured capacitance
x.
Step 3: according to the actual capacitance C of measured capacitance
xset up electric capacity predictor formula, i.e. C=C with the effective value U of superimposed voltage
x-kUt; Wherein, limit capacitance when C is measured capacitance damage, t is capacitance damage expeced time, k is that interior measured capacitance of unit interval is at the effective value U of current fundamental voltage
0the electric capacitance change coefficient of lower correspondence, that is,
wherein, C
x1and C
x2electric capacity initial value and final value for measured capacitance in the unit interval.
Step 4: derive the computing formula of capacitance damage t expeced time by described electric capacity predictor formula,
set described limit capacitance C, the expeced time being damaged to calculate measured capacitance.
Further, the effective value U of described superimposed voltage is by fundamental voltage u
0and nth harmonic component of voltage u (t)
n(t) square root of effective value quadratic sum obtains.
Further, described nth harmonic component of voltage u
n(t) in, n gets 5.
Technique scheme of the present invention has the following advantages compared to existing technology: (1) the present invention realized the voice signal of described ultrasonic sensor collection is carried out to squelch by noise suppressor, has improved the precision of ultrasonic sensor image data; (2) the present invention combines ultrasonic sensor and High Frequency Current Sensor, has realized the online detection without powered-down; (3) the present invention gathers by ultrasonic sensor the electric capacity sound pressure level L that measured capacitance produces
px; High Frequency Current Sensor gathers the magnitude of voltage at electric capacity two ends, sets up electric capacity predictor formula, utilizes this formula to predict the life-span of measured capacitance, than the current electric capacity actual capacitance of traditional only detection, judges that the electric capacity life-span is more forward-looking.
Accompanying drawing explanation
For content of the present invention is more likely to be clearly understood, below the specific embodiment by reference to the accompanying drawings of basis, the present invention is further detailed explanation, wherein
Fig. 1 is suitable for suppressing the theory diagram of the electric capacity stable state on-line detecting system of acquisition noise;
Fig. 2 is the process flow diagram of method of work that is suitable for suppressing the electric capacity stable state on-line detecting system of acquisition noise.
Embodiment
For making the object, technical solutions and advantages of the present invention more cheer and bright, below in conjunction with embodiment and with reference to accompanying drawing, the present invention is described in more detail.Should be appreciated that, these descriptions are exemplary, and do not really want to limit the scope of the invention.In addition, in the following description, omitted the description to known configurations and technology, to avoid unnecessarily obscuring concept of the present invention.
Embodiment 1
As shown in Figure 1, a kind of electric capacity stable state on-line detecting system that is suitable for suppressing acquisition noise, comprising:
Ultrasonic sensor, the voice signal producing for gathering measured capacitance, to obtain corresponding capacitance sound pressure level L
px.
High Frequency Current Sensor, for gathering the voltage vector at electric capacity two ends.
Described ultrasonic sensor, High Frequency Current Sensor are connected with data processing and control unit by corresponding data conditioning unit respectively; That is, ultrasonic sensor, High Frequency Current Sensor are connected with numerical control processing and control element (PCE) by first, second data conditioning unit respectively, and first, second data conditioning unit can adopt a certain proportion of amplifier consisting of integrated operational amplifier.
Described data processing and control unit, comprising:
Noise suppressor, is suitable for the voice signal of described ultrasonic sensor collection to carry out squelch, and inputs to electric capacity computing module.
Described noise suppressor can adopt the technical scheme of Chinese patent literature CN10370126A disclosed " noise suppressing method and noise suppressor ".
Electric capacity superimposed voltage computing module, is suitable for the voltage vector of acquisition to decomposite fundamental voltage u
0and nth harmonic component of voltage u (t)
n(t), that is, and the superimposed voltage u (t) at described measured capacitance two ends, i.e. u (t)=u
0(t)+u
n(t), calculate the effective value U of this superimposed voltage, calculate the effective value U of fundamental voltage simultaneously
0; Wherein, the method that obtains harmonic wave and first-harmonic is to obtain by FFT computing; the method is existing a large amount of description in prior art document, for example: Li Jiasheng, bavin generation are published in periodical < < protecting electrical power system and control existing associated description in the paper " harmonic wave on-line quick detection method research between electric energy quality harmonic " on > > outstanding in September, 2009.
Electric capacity computing module, is suitable for according to default measured capacitance type, rated capacitance C
0, by described electric capacity sound pressure level database, obtain the measured capacitance electric capacity sound pressure level L corresponding with the effective value that only has each first-harmonic
p0; The voice signal producing by measured capacitance, to obtain corresponding capacitance sound pressure level L
px, pass through formula
calculate the actual capacitance C of measured capacitance
x; Wherein, described electric capacity sound pressure level L
p0by setting up the mode of electric capacity sound pressure level database, obtain, in this database, store the electric capacity sound pressure level that all types of electric capacity is corresponding with the effective value of each fundamental voltage, by the type of default input measured capacitance, and the effective value that calculates resulting current fundamental voltage, from electric capacity sound pressure level database lookup, obtain the electric capacity sound pressure level data that this electric capacity is corresponding.Calculate corresponding capacitance sound pressure level L
pxmethod at paper document: be published in June, 2010 in the capacitor noise level calculation method based on vibration signal of < < electronic technology journal > > and be disclosed.
Measured capacitance life-span computing module, is suitable for the actual capacitance C according to measured capacitance
xset up electric capacity predictor formula, i.e. C=C with the effective value U of superimposed voltage
x-kUt, wherein, limit capacitance when C is measured capacitance damage, t is capacitance damage expeced time, k is that interior measured capacitance of unit interval is at the effective value U of current fundamental voltage
0the electric capacitance change coefficient of lower correspondence, that is,
c wherein
x1and C
x2for the effective value U at current fundamental voltage
0under unit interval in electric capacity initial value and the final value of measured capacitance, the electric capacitance change coefficient data storehouse that electric capacitance change coefficient k can be set up through actual measurement according to all types of electric capacity under the effective value of each fundamental voltage obtains, this electric capacitance change coefficient data storehouse is searched and is obtained the electric capacitance change coefficient k that this electric capacity is corresponding according to the effective value of electric capacity model and corresponding fundamental voltage, its concrete acquisition methods: measured all types of electric capacity electric capacity initial value and the final value within a period of time under the effective value of various fundamental voltages, converse again electric capacity initial value and final value corresponding in the unit interval, according to the type of default measured capacitance, and the effective value that calculates resulting current fundamental voltage, that from electric capacitance change coefficient data storehouse, searches goes out the electric capacitance change coefficient k that this electric capacity is corresponding, for the ease of calculating, if the variable quantity of electric capacity within the unit interval is linear, and by described electric capacity predictor formula, derive the computing formula of capacitance damage t expeced time,
set described limit capacitance C, the expeced time being damaged to calculate measured capacitance.
The effective value U computing method of described superimposed voltage u (t) comprise: fundamental voltage u
0and nth harmonic component of voltage u (t)
n(t) square root of effective value quadratic sum.Described nth harmonic component of voltage u
n(t) in, n gets 5.
Described data processing and control unit is realized by FPGA module, that is, and and fpga chip XC6SLX9-TQG144.
Embodiment 2
As shown in Figure 2, the method for work of a kind of electric capacity stable state on-line detecting system on embodiment 1 basis, comprising:
Step S100, obtains the superimposed voltage at measured capacitance two ends, the effective value of fundamental voltage.
Gather the voltage vector at measured capacitance two ends, and this voltage vector is decomposited to fundamental voltage u
0and nth harmonic component of voltage u (t)
n(t), that is, and the superimposed voltage u (t) at described measured capacitance two ends, i.e. u (t)=u
0(t)+u
n(t), calculate the effective value U of this superimposed voltage, calculate the effective value U of fundamental voltage simultaneously
0; Wherein, the method that obtains harmonic wave and first-harmonic is to obtain by FFT computing; the method is existing a large amount of description in prior art document, for example: Li Jiasheng, bavin generation are published in periodical < < protecting electrical power system and control existing associated description in the paper " harmonic wave on-line quick detection method research between electric energy quality harmonic " on > > outstanding in September, 2009.
Step S200, the actual capacitance of acquisition measured capacitance.
Set up electric capacity sound pressure level database, this database comprises: all types of electric capacity is distinguished corresponding electric capacity sound pressure level at the effective value that only has each first-harmonic.
Default measured capacitance type, rated capacitance C
0, by described electric capacity sound pressure level database, obtain measured capacitance at the effective value U of current fundamental voltage
0the electric capacity sound pressure level L of lower correspondence
p0; Gather the voice signal that measured capacitance produces, to obtain corresponding capacitance sound pressure level L
px, pass through formula
calculate the actual capacitance C of measured capacitance
x; Wherein, described rated capacitance C
0can obtain by the mode setting in advance described electric capacity sound pressure level L
p0by setting up the mode of electric capacity sound pressure level database, obtain, in this database, store the electric capacity sound pressure level that all types of electric capacity is corresponding with the effective value that only has each fundamental voltage, by the type of default input measured capacitance, and the effective value that calculates resulting current fundamental voltage, from electric capacity sound pressure level database lookup, obtain the electric capacity sound pressure level data that this electric capacity is corresponding; Wherein, only there is each fundamental voltage to refer to without harmonic voltage; Calculate corresponding capacitance sound pressure level L
pxmethod at paper document: be published in June, 2010 in the capacitor noise level calculation method based on vibration signal of < < electronic technology journal > > and be disclosed.
Step S300, by setting up electric capacity predictor formula, calculates the expeced time that measured capacitance is damaged.
Step S310, sets up electric capacity predictor formula and electric capacitance change coefficient k computing formula.
According to the actual capacitance C of measured capacitance
xset up electric capacity predictor formula, i.e. C=C with the effective value U of superimposed voltage
x-kUt, wherein, limit capacitance when C is measured capacitance damage, t is capacitance damage expeced time, k is that interior measured capacitance of unit interval is at the effective value U of current fundamental voltage
0the electric capacitance change coefficient of lower correspondence, that is,
c
x1and C
x2for the effective value U at current fundamental voltage
0under unit interval in electric capacity initial value and the final value of measured capacitance, the electric capacitance change coefficient data storehouse that electric capacitance change coefficient k can be set up through actual measurement according to all types of electric capacity and the effective value that only has each fundamental voltage obtains, this electric capacitance change coefficient data storehouse is searched and is obtained the electric capacitance change coefficient k that this electric capacity is corresponding according to the effective value of electric capacity model and corresponding fundamental voltage, its concrete acquisition methods: measured all types of electric capacity electric capacity initial value and the final value within a period of time under the effective value of various fundamental voltages, converse again electric capacity initial value and final value corresponding in the unit interval, according to the type of default measured capacitance, and the effective value that calculates resulting current fundamental voltage, that from electric capacitance change coefficient data storehouse, searches goes out the electric capacitance change coefficient k that this electric capacity is corresponding, for the ease of calculating, if the variable quantity of electric capacity within the unit interval is linear.
Step S320, calculates the expeced time that measured capacitance is damaged.
By described electric capacity predictor formula, derive the computing formula of capacitance damage t expeced time,
set described limit capacitance C, the expeced time being damaged to calculate measured capacitance, the i.e. serviceable life of measured capacitance; Wherein, limit capacitance C is by artificially setting, and the threshold value also giving a warning for electric capacity, is convenient to electric capacity to carry out online evaluation.
Further, the effective value U of described superimposed voltage is by fundamental voltage u
0and nth harmonic component of voltage u (t)
n(t) square root of effective value quadratic sum obtains.
Further, consider that harmonic energy distributes, described nth harmonic component of voltage u
n(t) in, n gets 5.
Table 1 is experimental data and actual measurement comparing result one, and the electric capacitor of table 1 is selected huge magnificent electric capacitor BSMJ-0.415-15-315Kvar, and to set described limit capacitance C be former capacity 40%.
Table 1 experimental data and the actual measurement table of comparisons
Wherein, when calculating electric capacitance change coefficient k, the unit interval is 24 hours, and, under 525V first-harmonic effective value, the capacitance change of a day is 0.08uf through actual measurement.
Table 2 is experimental data and actual measurement comparing result two, and the electric capacitor of table 2 is selected Shanghai Wei Sikang electric capacitor BSMJ0.4-15-3 electric capacity BSMJ0.45-15-3, and to set described limit capacitance C be former capacity 40%.
Table 2 experimental data and the actual measurement table of comparisons
Wherein, when calculating electric capacitance change coefficient k, the unit interval is 24 hours, and, under 450V first-harmonic effective value, the capacitance change of a day is 0.12uf through actual measurement; Or under 415V first-harmonic effective value, the capacitance change of a day is 0.11uf through actual measurement.
Table 3 is experimental data and actual measurement comparing result three, and the electric capacitor of table 3 is selected De Lixi self-healing low-voltage Parallel-connected Capacitor power capacitor BSMJS0.420-3BSMJ, and to set described limit capacitance C be former capacity 40%.
Table 3 experimental data and the actual measurement table of comparisons
Wherein, when calculating electric capacitance change coefficient k, the unit interval is 24 hours, and, under 380V first-harmonic effective value, the capacitance change of a day is 0.063uf through actual measurement.
In the present invention, first-harmonic effective value also can be thought the voltage effective value under perfect condition.
From table 1 to table 3, can find out, electric capacity of the present invention is online detects that to estimate electric capacity excess time be effective, have the advantages that accuracy is high, during limit capacitance C when approaching electric capacity actual capacitance and approach capacitance damage, the result of settling accounts more approaches measured result.
Should be understood that, above-mentioned embodiment of the present invention is only for exemplary illustration or explain principle of the present invention, and is not construed as limiting the invention.Therefore any modification of, making, be equal to replacement, improvement etc., within protection scope of the present invention all should be included in without departing from the spirit and scope of the present invention in the situation that.In addition, claims of the present invention are intended to contain whole variations and the modification in the equivalents that falls into claims scope and border or this scope and border.
Claims (5)
1. an electric capacity stable state on-line detecting system that is suitable for suppressing acquisition noise, is characterized in that, comprising:
Ultrasonic sensor, the voice signal producing for gathering measured capacitance, to obtain corresponding capacitance sound pressure level L
px;
High Frequency Current Sensor, for gathering the voltage vector at electric capacity two ends;
Described ultrasonic sensor, High Frequency Current Sensor are connected with data processing and control unit by corresponding data conditioning unit respectively;
Described data processing and control unit, comprising:
Noise suppressor, is suitable for the voice signal of described ultrasonic sensor collection to carry out squelch;
Electric capacity superimposed voltage computing module, is suitable for the voltage vector that gathers the measured capacitance two ends that obtain to decomposite fundamental voltage u
0and nth harmonic component of voltage u (t)
n(t), that is, and the superimposed voltage u (t) at described measured capacitance two ends, i.e. u (t)=u
0(t)+u
n(t), calculate the effective value U of this superimposed voltage, calculate the effective value U of fundamental voltage simultaneously
0;
Electric capacity computing module, sets up electric capacity sound pressure level database, and this database comprises: the electric capacity sound pressure level that all types of electric capacity is corresponding with the effective value that only has each first-harmonic; Default measured capacitance type, rated capacitance C
0, according to the effective value U of measured capacitance type and current fundamental voltage
0from described electric capacity sound pressure level database, obtain corresponding capacitance sound pressure level L
p0; The voice signal producing by measured capacitance, to obtain corresponding capacitance sound pressure level L
px, pass through formula
calculate the actual capacitance C of measured capacitance
x;
Measured capacitance life-span computing module, is suitable for the actual capacitance C according to measured capacitance
xset up electric capacity predictor formula, i.e. C=C with the effective value U of superimposed voltage
x-kUt; Wherein, limit capacitance when C is measured capacitance damage, t is capacitance damage expeced time, k is that interior measured capacitance of unit interval is at the effective value U of current fundamental voltage
0the electric capacitance change coefficient of lower correspondence, that is,
wherein, C
x1and C
x2electric capacity initial value and final value for measured capacitance in the unit interval; And by described electric capacity predictor formula, derive the computing formula of capacitance damage t expeced time,
set described limit capacitance C, the expeced time being damaged to calculate measured capacitance.
2. the electric capacity stable state on-line detecting system that is suitable for suppressing acquisition noise according to claim 1, is characterized in that, described nth harmonic component of voltage u
n(t) in, n gets 5.
3. a method of work that is suitable for suppressing the electric capacity stable state on-line detecting system of acquisition noise according to claim 1, is characterized in that comprising the steps:
Step 1: gather the voltage vector at measured capacitance two ends, and this voltage vector is decomposited to fundamental voltage u
0and nth harmonic component of voltage u (t)
n(t), that is, and the superimposed voltage u (t) at described measured capacitance two ends, i.e. u (t)=u
0(t)+u
n(t), calculate the effective value U of this superimposed voltage, the effective value U of fundamental voltage
0;
Step 2: set up electric capacity sound pressure level database, this database comprises: the electric capacity sound pressure level that all types of electric capacity is corresponding with the effective value difference that only has each first-harmonic;
Default measured capacitance type, rated capacitance C
0, according to the effective value U of measured capacitance type and current fundamental voltage
0from described electric capacity sound pressure level database, obtain corresponding capacitance sound pressure level L
p0;
Gather the voice signal that measured capacitance produces, to obtain corresponding capacitance sound pressure level L
px, pass through formula
calculate the actual capacitance C of measured capacitance
x;
Step 3: according to the actual capacitance C of measured capacitance
xset up electric capacity predictor formula, i.e. C=C with the effective value U of superimposed voltage
x-kUt; Wherein, limit capacitance when C is measured capacitance damage, t is capacitance damage expeced time, k is that interior measured capacitance of unit interval is at the effective value U of current fundamental voltage
0the electric capacitance change coefficient of lower correspondence, that is,
wherein, C
x1and C
x2electric capacity initial value and final value for measured capacitance in the unit interval;
Step 4: derive the computing formula of capacitance damage t expeced time by described electric capacity predictor formula,
set described limit capacitance C, the expeced time being damaged to calculate measured capacitance.
4. the method for work that is suitable for suppressing the electric capacity stable state on-line detecting system of acquisition noise according to claim 3, is characterized in that, the effective value U of described superimposed voltage is by fundamental voltage u
0and nth harmonic component of voltage u (t)
n(t) square root of effective value quadratic sum obtains.
5. the method for work that is suitable for suppressing the electric capacity stable state on-line detecting system of acquisition noise according to claim 4, is characterized in that described nth harmonic component of voltage u
n(t) in, n gets 5.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0961408A (en) * | 1995-08-25 | 1997-03-07 | Ube Ind Ltd | Evaluation of ceramics material |
| US20080110242A1 (en) * | 2004-11-12 | 2008-05-15 | Fmc Foodtech Ab | Apparatus and Method for Determining Physical Parameters in an Object Using Acousto-Electric Interaction |
| CN101231847A (en) * | 2008-01-09 | 2008-07-30 | 南京航空航天大学 | Structural vibration noise initiative control method and apparatus |
| CN101793922A (en) * | 2010-03-25 | 2010-08-04 | 南方电网技术研究中心 | Audible noise measuring circuit and method of power capacitor |
-
2014
- 2014-05-29 CN CN201410233873.7A patent/CN103995203B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0961408A (en) * | 1995-08-25 | 1997-03-07 | Ube Ind Ltd | Evaluation of ceramics material |
| US20080110242A1 (en) * | 2004-11-12 | 2008-05-15 | Fmc Foodtech Ab | Apparatus and Method for Determining Physical Parameters in an Object Using Acousto-Electric Interaction |
| CN101231847A (en) * | 2008-01-09 | 2008-07-30 | 南京航空航天大学 | Structural vibration noise initiative control method and apparatus |
| CN101793922A (en) * | 2010-03-25 | 2010-08-04 | 南方电网技术研究中心 | Audible noise measuring circuit and method of power capacitor |
Non-Patent Citations (3)
| Title |
|---|
| 倪学锋 等: "特高压直流换流站滤波电容器噪声特性试验研究", 《高电压技术》 * |
| 尹克宁: "电力电容器噪声的产生机理及其特性分析", 《电力电容器》 * |
| 董修峰 等: "电力电容器单元噪声试验及降噪方法探讨", 《电力电容器与无功补偿》 * |
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