CN105842556B - A kind of parallel single-phase capacitor-discharge coil discharge process calculation method - Google Patents
A kind of parallel single-phase capacitor-discharge coil discharge process calculation method Download PDFInfo
- Publication number
- CN105842556B CN105842556B CN201610120707.5A CN201610120707A CN105842556B CN 105842556 B CN105842556 B CN 105842556B CN 201610120707 A CN201610120707 A CN 201610120707A CN 105842556 B CN105842556 B CN 105842556B
- Authority
- CN
- China
- Prior art keywords
- discharge coil
- discharge
- voltage
- stable state
- power frequency
- 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
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000004364 calculation method Methods 0.000 title claims abstract description 12
- 238000004804 winding Methods 0.000 claims abstract description 26
- 239000003990 capacitor Substances 0.000 claims abstract description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 20
- 230000005284 excitation Effects 0.000 claims abstract description 20
- 230000005291 magnetic effect Effects 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000012512 characterization method Methods 0.000 claims description 3
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 2
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
Abstract
The invention discloses a kind of parallel single-phase capacitor-discharge coil discharge process calculation methods.Current method, which is used, is considered as inductance elements of the inductance value with electric current in several sections of jumps for discharge coil, is solved with capacitor composition R-L-C circuit, the accuracy in computation, speed of this method are all not ideal enough.The present invention is by obtaining discharge coil winding D.C. resistance, iron core excitation characteristic, core loss equivalent resistance, parallel single-phase capacitor-discharge coil discharge loop equivalent circuit is established, and establishes corresponding computation model using EMTP, realize the solution of parallel single-phase capacitor-discharge coil circuit discharge process.The present invention considers the influence of discharge coil non-linear exciter characteristic, core loss equivalent resistance, more accurate, rapidly can carry out parallel single-phase capacitor-discharge coil discharge process and solve.
Description
Technical field
The present invention relates to parallel single-phase capacitor-discharge coil discharge process calculation method, specifically a kind of considerations
Calculating parallel single-phase capacitor-discharge coil circuit charge discharging resisting process method of discharge coil iron core nonlinear characteristic.
Background technique
The shunt capacitor of isolated neutral system realizes the release of residual charge after its separating brake by discharge coil, obtains
Parallel single-phase capacitor-discharge coil discharge process is taken, judges whether discharge coil meets condenser charge rate of release requirement,
To reasonable setting parallel capacitor device parameter, guarantee that electric reactive compensating equipment safety operation is significant.
Discharge coil is parallel to capacitor both ends, and when capacitor access system, high-impedance behavior, capacitor is presented in discharge coil
After system disconnection, discharge coil is saturated rapidly device, and impedance value reduces, capacitor both ends charge of effectively releasing.Discharge coil iron
The nonlinear characteristic of the heart, winding directly hinder and core loss is the key that realize condenser charge release, energy consumption.
Currently, realizing that calculating the most accurate way of parallel single-phase capacitor-discharge coil discharge process is by discharge coil
Being considered as inductance value with electric current is in several sections of inductance elements jumped, forms R-L-C circuit with capacitor group, utilizes R-L-C circuit solution
Calculating formula is analysed, artificial calculate is carried out and solves.However, this method has certain limitation, discharge coil iron core is not considered first
Loss characteristic, it is secondly limited using the artificial solution computing capability that calculates, inductance value can only be reduced to a limited number of section of broken line, no
The nonlinear characteristic of discharge coil iron core can be fully demonstrated, therefore the accuracy in computation of the above method, speed are all not ideal enough.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the problems of the above-mentioned prior art, provide a kind of using EMTP
Parallel single-phase capacitor-discharge coil discharge process method is calculated, by obtaining discharge coil excitation property, core loss
Equivalent resistance, winding D.C. resistance establish parallel single-phase capacitor-discharge coil discharge loop equivalent circuit, and utilize EMTP
It establishes corresponding computation model and realizes and calculate, can be used for the selection of shunt capacitor and discharge coil parameter.
For this purpose, The technical solution adopted by the invention is as follows: a kind of parallel single-phase capacitor-discharge coil discharge process calculates
Method comprising following steps:
A) collecting device data obtains condenser capacity and discharge coil voltage rating；
B) test obtains discharge coil high-voltage winding D.C. resistance；
C) a series of test voltages are set, the test voltage is chosen in the 0.1-2 times of range of nominal tension；
D) under a certain test voltage, discharge coil high-voltage winding both end voltage and electric current power frequency stable state real-time waveform are obtained
Data, secondary winding open circuit；
E) discharge coil exciting current peak value is obtained using MATLAB software；
F) integral analysis is carried out to voltage waveform data using MATLAB software, obtains discharge coil high-voltage winding magnetic linkage number
Value；
G) repeat the above steps d)-f) test, complete all voltage testers, obtain discharge coil current peak-magnetic linkage
Numerical relation, i.e. excitation property；
H) discharge coil high-voltage winding both end voltage and electric current under voltage in 0.8-1.2 times of range of nominal tension one are utilized
Waveform obtains core loss equivalent resistance；
I) integrated capacitor capacitance, discharge coil winding D.C. resistance and its excitation property and the equivalent electricity of core loss
Resistance, establishes parallel single-phase capacitor-discharge coil discharge loop equivalent circuit；
J) based on the equivalent circuit, parallel single-phase capacitor-discharge coil discharge loop is established using EMTP software
Computation model；
K it) is solved using EMTP software realization parallel single-phase capacitor-discharge coil discharge process.
The present invention is straight by obtaining condenser capacity, discharge coil excitation property, core loss equivalent resistance and winding
Leakage resistance establishes parallel single-phase capacitor-discharge coil discharge loop equivalent circuit and realizes calculating.
Further, in step e), point-by-point peak value search is carried out to current waveform data using MATLAB software, obtains electric current
Peak value imax。
Further, in step f), the discharge coil iron core magnetic linkage numerical value ψmaxWith voltage, current wave under the test voltage
Shape relational expression are as follows:
In formula, u (t) is voltage waveform obtained by the characteristic test of discharge coil iron core excitation；I (t) is that discharge coil iron core is encouraged
Magnetic characteristic test gained current waveform；r1For discharge coil high-voltage winding D.C. resistance；t0When for voltage waveform u (t)=0 when
It carves, T is a power frequency period time, is 0.02s.
Further, in step g), the core loss equivalent resistance R0It is closed with voltage, current waveform under the test voltage
It is formula are as follows:
In formula, each meaning of parameters is identical as a upper formula.
Further, step I) in, using nonlinear inductance characterization discharge coil iron core nonlinear characteristic, inductance value with
Electric current increases and reduces.
Further, step J) in, discharge coil iron-core inductance is characterized using type93 element in EMTP software, in type93
Discharge coil excitation property is inputted in element to characterize its nonlinear characteristic.
Compared with the conventional method, the present invention has fully considered the nonlinear characteristic of discharge coil iron core, core loss to electricity
The influence of container-discharge coil discharge process, can it is more accurate, rapidly carry out capacitor-discharge coil discharge process meter
It calculates.
Detailed description of the invention
Fig. 1 is the principle of the present invention figure.
Fig. 2 is equivalent circuit diagram of the present invention.
Fig. 3 is that the present invention is based on shunt capacitor-discharge coil discharge loop computation models that EMTP is established.
Fig. 4 is that excitation property is arranged for discharge coil ferromagnetic element in the computation model established the present invention is based on EMTP.
Fig. 5 is that calculation method of the present invention calculates gained, capacitor voltage at both ends wave after parallel single-phase capacitor separating brake
Shape.
Fig. 6 is that calculation method of the present invention calculates gained, the current wave of discharge coil after parallel single-phase capacitor separating brake
Shape.
Specific embodiment
The invention will be further described with specific embodiment with reference to the accompanying drawings of the specification.
By taking certain 50HZ power grid 10kV parallel single-phase capacitor and its both ends parallel discharge coil as an example, below with the present invention
Shunt capacitor-discharge coil circuit discharge process is calculated, the specific steps are as follows:
1. collecting device data, acquisition condenser capacity is 180 μ F, and discharge coil voltage rating is 11kV.
2. carrying out D.C. resistance test to discharge coil, its high-voltage winding D.C. resistance R=109 Ω is obtained.
3. setting a series of test voltages.Test voltage includes 0.3,0.6,0.9,1.15,1.3,1.6 times of voltage rating.
4. obtaining discharge coil high-voltage winding both end voltage, current waveform data under each voltage.
5. peak value search is carried out to current waveform using MATLAB software, by taking 1.15 times of voltage ratings are tested as an example, electric current
Waveform peak is 0.135A.
6. carrying out integral analysis to voltage waveform using MATLAB software, winding magnetic linkage numerical value is obtained, it is specified with 1.15 times
For voltage tester, magnetic linkage numerical value is obtained by formula (1), as a result are as follows: 36.44Wb.
In formula, u (t) is voltage waveform obtained by the characteristic test of discharge coil iron core excitation；I (t) is that discharge coil iron core is encouraged
Magnetic characteristic test gained current waveform；r1For discharge coil high-voltage winding D.C. resistance；t0When for voltage waveform u (t)=0 when
It carves, T is a power frequency period time, is 0.02s.
7. repeat step 4.-step 6., to step 3. in test waveform under all voltages seek current peak imaxAnd magnetic
Chain numerical value ψmax, the results are shown in Table 1.
1 excitation curve test result of table
8. being obtained by formula (2) using voltage, current waveform under 1.15 times of voltage ratings and picking and placing electric coil core loss etc.
Imitate resistance R0=6 × 104Ω。
In formula, u (t) is voltage waveform obtained by the characteristic test of discharge coil iron core excitation；I (t) is that discharge coil iron core is encouraged
Magnetic characteristic test gained current waveform；r1For discharge coil high-voltage winding D.C. resistance；T is a power frequency period time, is
0.02s。
9. integrated capacitor capacitance, discharge coil winding D.C. resistance and its excitation property and the equivalent electricity of core loss
Resistance, establishes single-phase electricity container-discharge coil discharge loop equivalent circuit, as shown in Figure 2.Wherein nonlinear inductance LiCharacterization electric discharge
Iron-core inductance during coil discharge, the inductance value under discharge coil iron core difference electric current are determined by excitation property.
10. being based on equivalent circuit, parallel single-phase capacitor-discharge coil discharge loop computation model is established such as using EMTP
Shown in Fig. 3.
Wherein discharge coil iron-core inductance LiIt is characterized with the type93 element of EMTP, it is right that table 1 is inputted in type93 element
Excitation property is answered, as shown in Figure 4.
Solved using EMTP, obtain single-phase electricity container separating brake after capacitor voltage at both ends, flow through discharge coil current waveform
It is as shown in Figure 5, Figure 6 respectively.
Claims (6)
1. a kind of parallel single-phase capacitor-discharge coil discharge process calculation method comprising following steps:
A) collecting device data obtains condenser capacity and discharge coil voltage rating；
B) test obtains discharge coil high-voltage winding D.C. resistance；
C) a series of test voltages are set, the test voltage is chosen in the 0.1-2 times of discharge coil range of nominal tension；
D) under a certain test voltage, discharge coil high-voltage winding both end voltage power frequency stable state real-time waveform data and electric current are obtained
Power frequency stable state real-time waveform data, secondary winding open circuit；
E) discharge coil exciting current peak value is obtained using MATLAB software；
F) integral analysis is carried out to voltage power frequency stable state real-time waveform data using MATLAB software, obtains discharge coil high voltage winding
Group magnetic linkage numerical value；
G) repeat the above steps d)-f) test, complete all voltage testers, obtain discharge coil exciting current peak value-magnetic linkage
Numerical relation, i.e. excitation property；
H) discharge coil high-voltage winding both end voltage work under voltage in 0.8-1.2 times of discharge coil range of nominal tension one is utilized
Frequency stable state real-time waveform data and electric current power frequency stable state real-time waveform data obtain core loss equivalent resistance；
I) integrated capacitor capacitance, discharge coil high-voltage winding D.C. resistance and its excitation property and the equivalent electricity of core loss
Resistance, establishes parallel single-phase capacitor-discharge coil discharge loop equivalent circuit；
J) based on the equivalent circuit, parallel single-phase capacitor-discharge coil discharge loop is established using EMTP software and is calculated
Model；
K it) is solved using EMTP software realization parallel single-phase capacitor-discharge coil discharge process.
2. parallel single-phase capacitor according to claim 1-discharge coil discharge process calculation method, which is characterized in that
In step e), point-by-point peak value search is carried out to electric current power frequency stable state real-time waveform data using MATLAB software, obtains current peak
Value imax。
3. parallel single-phase capacitor according to claim 1-discharge coil discharge process calculation method, which is characterized in that
In step f), the discharge coil high-voltage winding magnetic linkage numerical value ψmaxWith voltage power frequency stable state real-time waveform number under the test voltage
According to, electric current power frequency stable state real-time waveform data relationship are as follows:
In formula, u (t) is voltage power frequency stable state real-time waveform data obtained by the characteristic test of discharge coil iron core excitation；I (t) is to put
Electric current power frequency stable state real-time waveform data obtained by the characteristic test of electric coil iron core excitation；r1For discharge coil high-voltage winding direct current
Resistance；t0To correspond to the moment when voltage power frequency stable state real-time waveform data u (t)=0, it is 0.02s that T, which is a power frequency period time,.
4. parallel single-phase capacitor according to claim 1-discharge coil discharge process calculation method, it is characterised in that step
It is rapid h) in, the core loss equivalent resistance R0With voltage power frequency stable state real-time waveform data, electric current work under the test voltage
Frequency stable state real-time waveform data relationship are as follows:
In formula, u (t) is voltage power frequency stable state real-time waveform data obtained by the characteristic test of discharge coil iron core excitation；I (t) is to put
Electric current power frequency stable state real-time waveform data obtained by the characteristic test of electric coil iron core excitation；r1For discharge coil high-voltage winding direct current
Resistance；T is a power frequency period time, is 0.02s.
5. parallel single-phase capacitor according to claim 1-discharge coil discharge process calculation method, it is characterised in that step
Rapid I) in, using the nonlinear characteristic of nonlinear inductance characterization discharge coil iron-core inductance, inductance value increases with electric current and is subtracted
It is small.
6. parallel single-phase capacitor according to claim 1-discharge coil discharge process calculation method, it is characterised in that step
Rapid J) in, discharge coil iron-core inductance is characterized using type93 element in EMTP, discharge coil is inputted in type93 element and is encouraged
Magnetic characteristic is to characterize its nonlinear characteristic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610120707.5A CN105842556B (en) | 2016-03-03 | 2016-03-03 | A kind of parallel single-phase capacitor-discharge coil discharge process calculation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610120707.5A CN105842556B (en) | 2016-03-03 | 2016-03-03 | A kind of parallel single-phase capacitor-discharge coil discharge process calculation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105842556A CN105842556A (en) | 2016-08-10 |
| CN105842556B true CN105842556B (en) | 2019-01-11 |
Family
ID=56586869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610120707.5A Active CN105842556B (en) | 2016-03-03 | 2016-03-03 | A kind of parallel single-phase capacitor-discharge coil discharge process calculation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105842556B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110474311A (en) * | 2018-05-09 | 2019-11-19 | 丹东德元电力电器有限公司 | Electronic type discharge coil |
| CN109599263A (en) * | 2018-10-17 | 2019-04-09 | 国网浙江省电力有限公司绍兴供电公司 | A kind of design method of amorphous core repid discharge coil |
| CN111366787B (en) * | 2020-03-22 | 2022-07-12 | 广西电网有限责任公司电力科学研究院 | Method and equipment for testing direct current resistance of capacitor discharge coil |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5986360A (en) * | 1997-08-12 | 1999-11-16 | Siemens Aktiengesellschaft | Device and method for controlling at least one capacitive actuator |
| CN101650398A (en) * | 2009-06-03 | 2010-02-17 | 云南电力试验研究院（集团）有限公司电力研究院 | Test method and compensation calculation method for measuring voltage-current characteristic of ferromagnetic element by low-frequency variable-frequency power source |
| CN103487705A (en) * | 2013-10-12 | 2014-01-01 | 江苏思源赫兹互感器有限公司 | Quality control method for excitation characteristics of C-type iron core voltage transformer |
| CN203551707U (en) * | 2013-09-23 | 2014-04-16 | 国家电网公司 | A 35 kV capacitor discharge coil monitoring device for a substation |
| CN204030610U (en) * | 2014-08-05 | 2014-12-17 | 国家电网公司 | The other digital discharge coil in parallel of capacitor group in a kind of power transmission and transformation system |
-
2016
- 2016-03-03 CN CN201610120707.5A patent/CN105842556B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5986360A (en) * | 1997-08-12 | 1999-11-16 | Siemens Aktiengesellschaft | Device and method for controlling at least one capacitive actuator |
| CN101650398A (en) * | 2009-06-03 | 2010-02-17 | 云南电力试验研究院（集团）有限公司电力研究院 | Test method and compensation calculation method for measuring voltage-current characteristic of ferromagnetic element by low-frequency variable-frequency power source |
| CN203551707U (en) * | 2013-09-23 | 2014-04-16 | 国家电网公司 | A 35 kV capacitor discharge coil monitoring device for a substation |
| CN103487705A (en) * | 2013-10-12 | 2014-01-01 | 江苏思源赫兹互感器有限公司 | Quality control method for excitation characteristics of C-type iron core voltage transformer |
| CN204030610U (en) * | 2014-08-05 | 2014-12-17 | 国家电网公司 | The other digital discharge coil in parallel of capacitor group in a kind of power transmission and transformation system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105842556A (en) | 2016-08-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Taylor et al. | Single-phase transformer inrush current reduction using prefluxing | |
| CN103986385B (en) | Method for restraining no-load closing magnetizing inrush current of transformer | |
| CN103558573B (en) | A kind of performance test methods of voltage transformer (VT) | |
| CN105842556B (en) | A kind of parallel single-phase capacitor-discharge coil discharge process calculation method | |
| CN106054036B (en) | A kind of main time constant computational methods of paper oil insulation based on extension debye equivalent circuit | |
| CN105425175A (en) | Iron core remanent magnetism elimination and measurement method based on polarity-reversal DC voltage source | |
| CN101105517A (en) | Gamma/ transformer triangle winding circumfluence algorithm method and device | |
| CN108256196B (en) | Improved pi model obtaining method of single-phase double-winding transformer considering deep saturation characteristic of iron core | |
| CN110008645A (en) | A kind of transformer loss calculation method | |
| CN107703368B (en) | Method for measuring inductance of transformer in deep saturation state | |
| CN102540128A (en) | Method for automatically calibrating error of combined three-phase current transformer | |
| CN107832488B (en) | Parameter extraction method and device for equivalent model of saturable reactor | |
| CN108957307B (en) | DC change-over switch oscillation parameter measurement method based on multiple parameters | |
| CN102901925A (en) | Method for testing characteristic parameter of conversion loop of direct current circuit breaker with extra and ultra-high voltage | |
| CN110828101A (en) | Power transformer demagnetization and remanence measurement device | |
| CN110161435A (en) | A kind of power transformer remanent magnetism magnitude estimation method based on winding deformation measurement | |
| CN202189115U (en) | Portable frequency conversion induction high-voltage tester | |
| CN104035039A (en) | Device and method for rapidly estimating storage battery capacity | |
| CN108061872B (en) | Method and device for testing residual magnetism in current transformer, storage medium and processor | |
| CN103777171B (en) | A kind of method of testing of current transformer exciting characteristic curve | |
| CN104483639B (en) | Residual magnetism estimation method for non-fault tripping of YNd11 type three-phase combined transformer | |
| CN111766545B (en) | Connector testing device | |
| CN203561743U (en) | Performance testing device for voltage transformer | |
| CN108089118A (en) | High voltage direct current converter valve thyristor component presses loop parameter Simple measurement device | |
| Zhou et al. | A model considering deep saturation of the iron core for 10 kV potential transformers |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |