CN102435839B - Method for calculating injected energy of tolerance blasting energy test on high-voltage power capacitor - Google Patents
Method for calculating injected energy of tolerance blasting energy test on high-voltage power capacitor Download PDFInfo
- Publication number
- CN102435839B CN102435839B CN 201110256276 CN201110256276A CN102435839B CN 102435839 B CN102435839 B CN 102435839B CN 201110256276 CN201110256276 CN 201110256276 CN 201110256276 A CN201110256276 A CN 201110256276A CN 102435839 B CN102435839 B CN 102435839B
- Authority
- CN
- China
- Prior art keywords
- energy
- test product
- test
- capacitor
- discharge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 92
- 239000003990 capacitor Substances 0.000 title claims abstract description 45
- 238000005422 blasting Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000004146 energy storage Methods 0.000 claims abstract description 13
- 238000004880 explosion Methods 0.000 claims description 6
- 239000012212 insulator Substances 0.000 claims description 6
- 238000007599 discharging Methods 0.000 abstract 7
- 238000010586 diagram Methods 0.000 description 6
- 239000003921 oil Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Landscapes
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to a method for calculating the injected energy of a tolerance blasting energy test on a high-voltage power capacitor. The method comprises the following steps: introducing an energy Joule integral I<2>t definition: I<2>t is equal to an integral value of the square of the instantaneous value of current flowing through the capacitor to time within a specific time range, wherein I is the instantaneous value of the current flowing through the capacitor, and t is the time; according to short-circuit discharging of a specimen, recording a standard discharge waveform and charging energy W0, and calculating the energy Joule integral I0<2>t of standard discharging current; discharging by the inserted specimen, recording the discharging waveform of the specimen, charging energy Wx, the equivalent capacity C0 and the residual voltage Ur of an energy-storage capacitor, and calculating the energy Joule integral Ix<2>t of the discharging current of the specimen; and working out a WRx value according to the formula as follows: the injected energy WRx of the specimen is equal to Wx-W0*Ix<2>t/I0<2>-1/2C0*Ur<2> so as to judge whether the injected energy passes the energy test or not. In the method, only the energy Joule integral values of the standard discharging current and the discharging current of the specimen need to be calculated, the injected energy of the specimen can be calculated. The method is extremely simple and convenient and efficient.
Description
Technical field
The present invention relates to the test of a kind of high-voltage power capacitor tolerance blasting energy and inject energy method computations, belong to the power capacitor technical field.
Background technology
High-voltage power capacitor such as shnt capacitor; filter capacitor; series capacitor etc.; be in operation interpolar penetrability puncture short fault takes place; usually puncture and appear near the voltage peak; and power current is in zero cross near; this moment, direct all intact capacitors in parallel discharged to the fault capacitor short-circuit with it; moment is injected big energy; at the strong electric arc of the inner formation of fault capacitor; insulating medium and the impregnant of fault capacitor inside decompose rapidly under the effect of internal arc; in the extremely short time, produce a large amount of gas and high temperature; impel the pressure in the tank of power capacitor to rise suddenly; case shell and insulator to capacitor produce powerful the impact; when this burst impulsive force during greater than the physical strength of case shell or insulator; explosion will take place in case shell or the insulator of capacitor; fault is further enlarged, produce serious consequence.So the test of power industry standard DL/T 840-2003 " high-voltage parallel capacitor operation technique condition " regulation capacitor tolerance blasting energy is the type approval test project, requires to inject energy and is not less than the full film of 15kW.s() or 10kW.s(film paper).In process of the test, how the actual injection energy of calculable capacitor is technological difficulties of capacitor manufacturing enterprise and testing agency always.At present, existent method all adopts the RLC cyclic current method basically, according to preceding several electric current half-wave peak values and the time of discharge current waveform, calculates discharge current second-order equation RLC parameter, obtains the discharge current function, injects energy thereby calculate.This method calculation of complex, loaded down with trivial details, when discharge current can use during for typical decay Sasser, when being non-decay Sasser, discharge current just can not be suitable for, generally adopt the sectional curve fitting method, draw approximate mathematic(al) representation, calculate more complicated and error is big.
Summary of the invention
The invention provides the test of a kind of high-voltage power capacitor tolerance blasting energy and inject energy method computations, to overcome the deficiency of prior art, in order to achieve the above object, technical scheme of the present invention is:
Energy method computations is injected in the test of a kind of high-voltage power capacitor tolerance blasting energy, introduces the energy Joule integral
I 2 tDefinition:
I 2 t=
, in specific time range, flow through square integrated value to the time of the current instantaneous value of capacitor; Wherein i is the current instantaneous value that flows through capacitor; T is the time; According to the discharge of test product short circuit, record benchmark discharge waveform, rechargeable energy W
0, the energy Joule integral of calculating benchmark discharge current
I 0 2 tThe discharge of access test product, record test product discharge waveform, rechargeable energy W
x, energy-storage capacitor group equivalent capacity C
0, residual voltage Ur, the energy Joule integral of calculating the test product discharge current is
I x 2 t, then test product injects energy W
Rx: W
Rx=W
x-W
0*
-
Calculate W
RxValue.Inject energy W by the test product that calculates
RxJudge that test product injects energy W
RxWhether reach specified blasting energy requirement, and whether test product shell and insulator explosion or leakage of oil appear; Work as W
RxThe specified blasting energy value of 〉=test product itself shows that test product injects energy and meets the requirements, and explosion or leakage of oil do not appear in test product, thinks that then this test product is by test; Work as W
RxDuring the specified blasting energy value of＜test product itself, show that test product injects energy and do not reach requirement, then change test product, adjust loop parameter and test again.
Beneficial effect of the present invention is: the present invention only need calculate the energy Joule integral value of benchmark discharge current and test product discharge current, need not to calculate RLC parameter and the discharge current function of discharge current second-order equation, can calculate test product and inject energy, very easy, efficient.
Description of drawings
Fig. 1 is embodiment of the invention test principle wiring diagram;
Fig. 2 is embodiment of the invention benchmark discharge test equivalent circuit diagram;
Fig. 3 is embodiment of the invention test product discharge test equivalent circuit diagram;
Fig. 4 is embodiment of the invention benchmark sparking voltage current waveform figure;
Fig. 5 is embodiment of the invention test product sparking voltage current waveform figure.
Embodiment
Energy method computations is injected in a kind of high-voltage power capacitor tolerance blasting energy test of present embodiment, and its capacitor tolerance blasting energy test adopts high direct voltage to concentrate energy storage, and the pulsed discharge mode is carried out.Fig. 1 is the test principle wiring diagram, T1-----pressure regulator wherein, T2-----transformer; R-----protective resistance, D-----rectification silicon stack, V-----high pressure gauge; C-----energy-storage capacitor group, K-----discharge switch, Cx-----test product; J-----short circuit sheet; Fr-----RC divider, U-----charging voltage, M-----Luo-coil; I-----discharge current, L-----transient data registering instrument.Test product adopts the electric breakdown mode for presetting the fault capacitor.Measure energy-storage capacitor group voltage with RC divider, Luo-coil is measured impulse discharge current, transient data registering instrument recording voltage current waveform data.
Test method; The test of capacitor tolerance blasting energy comprises benchmark discharge test and test product discharge test, and the former is used for verification and adjusts loop parameter, after the latter detects test product injection energy, and shell and insulator distortion situation.At first determine rechargeable energy W according to the specified blasting energy of test product
0, energy-storage capacitor group equivalent capacity C
0, calculate charging voltage U
0
1, benchmark discharge test; Can ignore with a short circuit sheet J(resistance) be connected on test product the two poles of the earth, by charge circuit (the T1 pressure regulator, T2 transformer, R protective resistance, D rectification silicon stack, the V high pressure gauge that comprise Fig. 1) energy-storage capacitor group C is charged, when charging voltage equals U
0, make its rechargeable energy
Equal W
0The time, stopping charging, the K that closes a switch carries out pulsed discharge, record benchmark sparking voltage current waveform, Fig. 4 is benchmark sparking voltage current waveform figure.
2, test product discharge test; Remove short circuit sheet J and insert test product, equally to energy-storage capacitor group C charging, when charging voltage equals U
x, make its rechargeable energy
Equal W
xThe time (U generally speaking
xEqual U
0, W
xEqual W
0), stopping charging, the K that closes a switch carries out pulsed discharge, record test product sparking voltage current waveform, Fig. 5 is test product sparking voltage current waveform figure.
Two, injecting energy calculates; Fig. 2 is benchmark discharge test equivalent circuit diagram; C wherein
0-----energy-storage capacitor group equivalent capacity, K-----discharge switch, R
0-----loop equivalent resistance, L
0-----loop equivalent inductance, U
0-----charging voltage, i
0(t)-----impulse discharge current.Adopt making software to analyze the benchmark discharge current waveform, utilize formula
Calculate the energy Joule integral value of benchmark discharge current
I 0 2 t=
According to law of conservation of energy, during the discharge of test product short circuit, the final full consumption of rechargeable energy is in resistance R
0On, namely
W
0=R
0*
I 0 2 t, formula;
Counter circuit equivalent resistance R
0=
, formula two;
Fig. 3 is test product discharge test equivalent circuit diagram; C wherein
0-----energy-storage capacitor group equivalent capacity, K-----discharge switch, R
0-----loop equivalent resistance, L
0-----loop equivalent inductance, Rx-----test product equivalent resistance, L
x-----test product equivalent inductance, U
x-----charging voltage, i
x(t)-----impulse discharge current.Adopt making software to analyze the benchmark discharge current waveform, utilize formula
Calculate the energy Joule integral value of benchmark discharge current
I x 2 t=
When test product inserts discharge, resistance R
0Consumed energy W
R0=R
0*
I x 2 t, formula three;
Formula two substitutions are got W
R0=W
0*
, formula four;
Energy-storage capacitor group equivalent capacity C
0, residual voltage is Ur, residual charge energy W
r=
, formula five;
Test product injects energy W
Rx=W
x-W
R0– W
r, formula six;
Formula four, formula five substitutions are got, and test product injects energy
W
Rx=W
x-W
0*
-
, formula seven.
Rechargeable energy W
xAnd W
0, energy-storage capacitor group equivalent capacity C
0Ur is known with residual voltage, therefore according to formula seven, only needs to calculate the energy Joule integral value of benchmark discharge current and test product discharge current, can calculate test product and inject energy, and is very easy, efficient.
The test findings criterion.Work as W
RxThe specified blasting energy value of 〉=test product itself shows that test product injects energy and meets the requirements, and explosion or leakage of oil do not appear in test product, thinks that then this test product is by test; Work as W
RxDuring the specified blasting energy value of＜test product itself, show that test product injects energy and do not reach requirement, then change test product, adjust loop parameter and test again.
Claims (1)
1. energy method computations is injected in high-voltage power capacitor tolerance blasting energy test, it is characterized in that: introduce the energy Joule integral
I 2 tDefinition:
I 2 t=
, in specific time range, flow through square integrated value to the time of the current instantaneous value of capacitor; Wherein i is the current instantaneous value that flows through capacitor; T is the time; According to the discharge of test product short circuit, record benchmark discharge waveform, rechargeable energy W
0, the energy Joule integral of calculating benchmark discharge current
I 0 2 tThe discharge of access test product, record test product discharge waveform, rechargeable energy W
x, energy-storage capacitor group equivalent capacity C
0, residual voltage Ur, the energy Joule integral of calculating the test product discharge current is
I x 2 t, then test product injects energy W
Rx: W
Rx=W
x-W
0*
-
Calculate W
RxValue; Inject energy W by the test product that calculates
RxJudge that test product injects energy W
RxWhether reach specified blasting energy requirement, and whether test product shell and insulator explosion or leakage of oil appear; Work as W
RxThe specified blasting energy value of 〉=test product itself shows that test product injects energy and meets the requirements, and explosion or leakage of oil do not appear in test product, thinks that then this test product is by test; Work as W
RxDuring the specified blasting energy value of＜test product itself, show that test product injects energy and do not reach requirement, then change test product, adjust loop parameter and test again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110256276 CN102435839B (en) | 2011-09-01 | 2011-09-01 | Method for calculating injected energy of tolerance blasting energy test on high-voltage power capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110256276 CN102435839B (en) | 2011-09-01 | 2011-09-01 | Method for calculating injected energy of tolerance blasting energy test on high-voltage power capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102435839A CN102435839A (en) | 2012-05-02 |
| CN102435839B true CN102435839B (en) | 2013-07-03 |
Family
ID=45983996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110256276 Active CN102435839B (en) | 2011-09-01 | 2011-09-01 | Method for calculating injected energy of tolerance blasting energy test on high-voltage power capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102435839B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879683B (en) * | 2012-09-29 | 2014-12-24 | 中国西电电气股份有限公司 | Withstand explosion detection device and method for power capacitor |
| CN106885974A (en) * | 2017-01-16 | 2017-06-23 | 国家电网公司 | A kind of high-voltage parallel capacitor short circuit dischange experimental rig |
| CN108806984A (en) * | 2018-04-27 | 2018-11-13 | 中国电力科学研究院有限公司 | The anti-blasting method of compact type shunt capacitor for extra-high voltage |
-
2011
- 2011-09-01 CN CN 201110256276 patent/CN102435839B/en active Active
Non-Patent Citations (10)
| Title |
|---|
| 孙进科 等.电容器单元***能量与电容器组接线结构方式之关系.《电力电容器》.2007,第28卷(第5期),44-46. |
| 并联电容器外壳***能量试验;李肇绎;《电力电容器》;19821231(第3期);第10-15页 * |
| 张国明 等.电力电容器外壳爆裂试验研究.《电力电容器外壳爆裂试验研究》.1988,第5-9页. |
| 徐为纲 等.电力电容器外壳耐爆试验及注入能量计算方法的探讨.《电力电容器》.1991,(第1期),53-58. |
| 李肇绎.并联电容器外壳***能量试验.《电力电容器》.1982,(第3期),第10-15页. |
| 电力电容器外壳爆裂试验研究;张国明 等;《电力电容器外壳爆裂试验研究》;19881231;第5-9页 * |
| 电力电容器外壳耐爆试验及注入能量计算方法的探讨;徐为纲 等;《电力电容器》;19911231(第1期);53-58 * |
| 电容器单元***能量与电容器组接线结构方式之关系;孙进科 等;《电力电容器》;20071030;第28卷(第5期);44-46 * |
| 陈温良 等.高压并联电容器壳体耐爆能力试验研究的新进展及相关问题的探讨.《电力电容器与无功补偿》.2009,第30卷(第1期),第34-39页. |
| 高压并联电容器壳体耐爆能力试验研究的新进展及相关问题的探讨;陈温良 等;《电力电容器与无功补偿》;20090220;第30卷(第1期);第34-39页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102435839A (en) | 2012-05-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202221465U (en) | Power capacitor tolerance blasting energy testing apparatus | |
| Omar et al. | Assessment of lithium-ion capacitor for using in battery electric vehicle and hybrid electric vehicle applications | |
| CN202676815U (en) | Follow current interrupting test circuit for externally gapped line arrester | |
| CN101598757A (en) | A kind of controllable metal oxide arrester residual voltage test loop and method | |
| CN104167727B (en) | The system and method for the identification of medium voltage distribution network ferro resonance and suppression | |
| CN104375025B (en) | Diagnostic method for ferromagnetic resonance in neutral non-grounding 10kV system | |
| CN107290668A (en) | The screening method for group matching that a kind of batteries of electric automobile echelon is utilized | |
| CN107703449A (en) | The quick determination method of service life of lead accumulator | |
| CN103346542A (en) | High-voltage direct-current transmission line high-resistance grounding fault identification method based on distributed parameters | |
| CN101339214A (en) | Accumulator internal resistance measurement method | |
| CN102435839B (en) | Method for calculating injected energy of tolerance blasting energy test on high-voltage power capacitor | |
| CN108614218A (en) | A kind of continuous method for measuring lithium ion battery dynamic internal resistance | |
| CN106443195A (en) | Insulation resistance measuring method and insulation resistance measuring equipment | |
| CN104330662A (en) | Testing device and testing method for direct-current magnetic bias of converter transformer | |
| CN106226661A (en) | Use detection structure and the method for succusion detection reactor turn-to-turn insulation fault | |
| CN109557478A (en) | A kind of lithium ion battery safety performance appraisal procedure | |
| CN1776986A (en) | Controllable damp device of ferromagnetic resonance for electromagnetic voltage transformer for distribution network | |
| CN102998529A (en) | Insulation resistance testing method | |
| CN105911373A (en) | Method for measuring electrostatic capacity of supercapacitor and device thereof | |
| CN205317867U (en) | Power capacitor tolerance blasting energy testing apparatus | |
| CN203117319U (en) | Combination waveform generator | |
| CN201188539Y (en) | Resonance damping device for power distribution network PT | |
| CN106712213B (en) | A kind of movable type charger baby battery management system | |
| CN103312001A (en) | Battery-charging method and system with super capacitor for energy storage system | |
| CN101286634A (en) | Protection method of parellel reactor based on parameter identification |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID CORPORATION OF CHINA Effective date: 20130104 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20130104 Address after: 312000 Shaoxing Shengli Road, Zhejiang, No. 58 Applicant after: Shaoxing Power Bureau Applicant after: State Grid Corporation of China Address before: 312000 Shaoxing Shengli Road, Zhejiang, No. 58 Applicant before: Shaoxing Power Bureau |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |