CN106205306B - A kind of 35kV capacitance type potential transformer Simulation Model of Ferroresonance - Google Patents
A kind of 35kV capacitance type potential transformer Simulation Model of Ferroresonance Download PDFInfo
- Publication number
- CN106205306B CN106205306B CN201610508575.3A CN201610508575A CN106205306B CN 106205306 B CN106205306 B CN 106205306B CN 201610508575 A CN201610508575 A CN 201610508575A CN 106205306 B CN106205306 B CN 106205306B
- Authority
- CN
- China
- Prior art keywords
- bus
- capacitance type
- ferromagnetic resonance
- type potential
- potential transformer
- 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
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/18—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism
- G09B23/188—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism for motors; for generators; for power supplies; for power distribution
Landscapes
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Mathematical Analysis (AREA)
- Computational Mathematics (AREA)
- Algebra (AREA)
- Power Engineering (AREA)
- Mathematical Optimization (AREA)
- Mathematical Physics (AREA)
- Pure & Applied Mathematics (AREA)
- Business, Economics & Management (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- Theoretical Computer Science (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a kind of 35kV capacitance type potential transformer Simulation Model of Ferroresonance, it includes two group capacitors, 35kV ac bus, three-phase alternating current potential source, capacitance type potential transformer and ferromagnetic resonance judgment module and automatic harmonic elimination device, wherein: every group capacitor passes through corresponding breaker access 35kV ac bus, and the three-phase alternating current potential source accesses 35kV ac bus；The 35kV ac bus is three-phase alternating current bus, and each phase ac bus corresponds to one ferromagnetic resonance judgment module of access, capacitance type potential transformer and automatic harmonic elimination device；When ferromagnetic resonance occurs, while two impulse generators being made to generate positive pulse electric current, puts into damping resistance；After ferromagnetic resonance disappears, two impulse generators is made to generate negative pulse current, first backed off after random damping resistance at a certain time interval.The present invention can simulate the occurrence condition of ferromagnetic resonance in real power system, find the optimum controling strategy for inhibiting ferromagnetic resonance.
Description
Technical field
The present invention relates to a kind of 35kV electric power system model, especially a kind of capacitance type potential transformer ferromagnetic resonance is imitated
True mode.
Background technique
The 35kV bus of 500kV substation, China is widely used capacitance type potential transformer (abbreviation CVT) and carries out voltage survey
Amount.Since voltage transient characteristic is poor, the high-pressure side CVT still uses fuse as protection for 35kV and following voltage rating system.
In order to adjust system voltage in 500kV substation, compensating reactive power capacity needs frequent switching 35kV shunt capacitor group.It is throwing
After entering 35kV shunt capacitor group, the fusing even failure of explosion frequently occur for the high-pressure side CVT fuse in power grid, affect electricity
The economy of net stable operation and electricity consumption of standing.CVT itself ferromagnetic resonance caused by capacitor bank lock shoves is to lead to CVT
A kind of reason that primary side fuse fuses extremely.
When CVT works under rated voltage, intermediate transformer iron core is unsaturated, and excitation reactance is very big, is equivalent to open circuit.When
There is overvoltage in primary side, excites the core sataration of intermediate transformer, will lead to excitation reactance and strongly reduces, derided capacitors then hold
LC resonance circuit easily is constituted with compensation reactor, intermediate transformer, that is, so-called ferromagnetic resonance is formed, to easily cause CVT
There is over-current phenomenon avoidance in primary side.
Summary of the invention
To achieve the above object, the present invention proposes a kind of 35kV capacitance type potential transformer Simulation Model of Ferroresonance, leads to
The condition of capacitance type potential transformer ferromagnetic resonance is excited when crossing research shunt capacitor group investment, is damped in automatic harmonic elimination device
Different throw of resistance moves back strategy to the inhibitory effect of ferromagnetic resonance, obtains the best approach for inhibiting ferromagnetic resonance.
To achieve the above object, the technical solution adopted by the present invention is that:
A kind of 35kV capacitance type potential transformer Simulation Model of Ferroresonance comprising two group capacitors, 35kV exchange are female
Line, three-phase alternating current potential source, capacitance type potential transformer and ferromagnetic resonance judgment module and automatic harmonic elimination device, in which:
Every group capacitor passes through corresponding breaker access 35kV ac bus, the three-phase alternating current potential source access
35kV ac bus；The 35kV ac bus is three-phase alternating current bus, and the corresponding access one of each phase ac bus is ferromagnetic
Resonance judgment module, capacitance type potential transformer and automatic harmonic elimination device；
The ferromagnetic resonance judgment module for judge whether occur ferromagnetic resonance comprising ammeter, voltmeter and
Oscillograph, the ammeter are serially connected with capacitance type potential transformer primary side, and the voltmeter is connected to corresponding phase ac bus
On, the output end of the ammeter and voltmeter is connected to oscillograph；
The primary side of the capacitance type potential transformer is simultaneously connected on corresponding phase ac bus, and secondary side connection disappears automatically
Humorous device；
The automatic harmonic elimination device includes two gate level turn-off thyristors, two damping resistances and two pulse generations
Device, wherein the cathode of each gate level turn-off thyristor is connected respectively one end of a damping resistance, and each gate pole can close
The gate pole of disconnected thyristor is connected respectively the output end of an impulse generator, and the anode of two gate level turn-off thyristors is equal
It is connected to one end of capacitance type potential transformer secondary side, the other end of two damping resistances is connected to capacitor voltage mutual inductance
The other end of device secondary side；
When ferromagnetic resonance occurs, while two impulse generators being made to generate positive pulse electric current, puts into damping resistance；Work as iron
After magnetic resonance disappears, two impulse generators is made to generate negative pulse current, first backed off after random damping resistance at a certain time interval.
Every group capacitor is the three-phase dual star topology mode of connection.
The capacitance type potential transformer includes the first derided capacitors, the second derided capacitors, intermediate transformer, wherein institute
Corresponding phase ac bus is accessed in the one end for stating the first derided capacitors, and the other end is grounded by the second derided capacitors, the intermediate change
Depressor includes first winding and secondary winding, and the secondary winding includes remaining winding and main secondary winding, the first winding
It is connected on the second derided capacitors, the main secondary winding accesses secondary load, and the residue winding access is corresponding to disappear automatically
Humorous device.
A compensation reactor is also concatenated in the first winding.
The resistance value of described two damping resistances is 5-10 Ω, and the time interval is 0.1-0.3s.
Compared with prior art, the present invention having the advantage that
1, it can verify whether inrush current after shunt capacitor is put into can excite by closing for two breakers of setting
Ferromagnetic resonance occurs for capacitance type potential transformer.The closing moment that two breakers are arranged can be verified under different operating conditions, system
The condition of middle excitation ferromagnetic resonance；
2, by oscillograph voltage and current amplitude variation and wave distortion can intuitively judge be in system
It is no that ferromagnetic resonance has occurred；
3, Rm1, Rm2 resistance value are set as 5-10 Ω, Rm1, Rm2 are put into simultaneously when investment, and 0.2s is divided between exit time can
To reach best harmonic elimination effect, and ferromagnetic resonance will not be caused again when exiting.
Detailed description of the invention
Fig. 1 is a kind of circuit diagram of 35kV capacitance type potential transformer Simulation Model of Ferroresonance of the present invention；
Fig. 2 is the circuit of corresponding 35kV capacitance type potential transformer Simulation Model of Ferroresonance on single-phase bus in Fig. 1
Schematic diagram；
Fig. 3 is the circuit diagram of capacitor；
Fig. 4 is the circuit diagram of capacitance type potential transformer；
Fig. 5 is the circuit diagram of automatic harmonic elimination device；
Fig. 6 is the transient emulation waveform diagram of capacitance type potential transformer primary side (first winding side)；
Fig. 7 is the simulation waveform of capacitor switching current；
Fig. 8 is the simulation waveform of intermediate transformer voltage.
Specific embodiment
The contents of the present invention are described in further details with reference to the accompanying drawings and detailed description.
Embodiment
It please refers to shown in Fig. 1, a kind of 35kV capacitance type potential transformer Simulation Model of Ferroresonance comprising capacitor group
11, capacitor group 12, breaker 21, breaker 22,35kV ac bus 3, three-phase alternating current potential source 4 and capacitor voltage
Mutual inductor, ferromagnetic resonance judgment module and automatic harmonic elimination device.Wherein, 35kV ac bus 3 includes A phase ac bus 31, B phase
Ac bus 32 and C phase ac bus 33, capacitor group 11 and capacitor group 12 are two groups of back-to-back shunt capacitors.Three intersections
The voltage of galvanic electricity potential source 4 is set as 35kV, and A phase voltage initial phase angle is 0 °, and B, C phase voltage successively differ 120 °.Capacitor group 11
Pass through breaker 21 and the access 35kV ac bus 3 in parallel of breaker 22, three-phase alternating current potential source 4 respectively with capacitor group 12
Access 35kV ac bus 3.Every phase ac bus be correspondingly connected with a ferromagnetic resonance judgment module, capacitance type potential transformer and
Automatic harmonic elimination device, i.e. A phase ac bus 31 connect ferromagnetic resonance judgment module 51, capacitance type potential transformer 61 and disappear automatically
Humorous device 71；B phase ac bus 32 connects ferromagnetic resonance judgment module 52, capacitance type potential transformer 62 and automatic harmonic elimination device
72；C phase ac bus 33 connects ferromagnetic resonance judgment module 53, capacitance type potential transformer 63 and automatic harmonic elimination device 73.
The present invention is able to verify that can shunt capacitor swash using the combined floodgate dash current after back-to-back mode sequence investment
It sends out CVT (capacitance type potential transformer) and ferromagnetic resonance occurs, it, can be with by setting breaker 21, the closing moment of breaker 22
The voltage for inspiring CVT ferromagnetic resonance under different operating conditions, current waveform are simulated, is most preferably closed a floodgate to find out shunt capacitor group
Time.Different control strategies can also be verified in automatic harmonic elimination device simultaneously to the superiority and inferiority of ferromagnetic resonance inhibitory effect.The present invention
The occurrence condition of ferromagnetic resonance in real power system can be simulated, find the optimum controling strategy for inhibiting ferromagnetic resonance.
By taking the capacitance type potential transformer Simulation Model of Ferroresonance of A phase ac bus 31 as an example, other each phases are tied therewith
Structure is identical.Shown in referring to figure 2., for judging whether ferromagnetic resonance occurs for ferromagnetic resonance judgment module 51 comprising electricity
Flow table 511, voltmeter 512 and oscillograph 513, ammeter 511 are serially connected on A phase ac bus 31, and voltmeter 512 is connected to
On A phase ac bus 31, the output end of ammeter 511 and voltmeter 512 is connected to oscillograph 513；Specifically 511 He of ammeter
The positive input terminal of voltmeter 512 is connected on A phase ac bus 31, and the negative input end of ammeter 511 can be connected to capacitive battery
Press the primary side of mutual inductor 61, the negative input end ground connection of voltmeter 512.The secondary side access of capacitance type potential transformer 61 is automatic
Harmonic elimination apparatus 71.
Judge whether that ferromagnetic resonance occurs will put into when ferromagnetic resonance occurs by the amplitude and frequency of monitoring voltage
The damping resistance of automatic harmonic elimination device 71；After ferromagnetic resonance disappears, the damping resistance of automatic harmonic elimination device 71 will move out.By showing
The waveform of voltage and current can intuitively judge whether ferromagnetic resonance has occurred in model in wave device.By the way that breaker is arranged
21, breaker 22, which closes, can verify whether inrush current after shunt capacitor group 11,12 is put into can excite CVT (capacitive battery
Press mutual inductor 61) ferromagnetic resonance occurs.Setting breaker 21, breaker 22 can be verified under different operating conditions at the time of closing, mould
The condition of ferromagnetic resonance is excited in type.
The structure of capacitor group is as shown in figure 3, every group capacitor is all made of the three-phase dual star topology mode of connection, and neutral point is not
Ground connection, single branch capacitance are the string of 44.5uF, five and four, every phase capacitance (LCA, LCB or LCC) 111.25uF, current-limiting reactor
Resistance is 3.55 Ω, reactance 11mH, thirdly phase contact Conn1, Conn2, Conn3 pass through breaker 21 respectively accesses to A phase
Ac bus 31, B phase ac bus 32 and C phase ac bus 33.
The structure of capacitance type potential transformer 61 is as shown in Figure 4 comprising derided capacitors C1, derided capacitors C2, intermediate change
Depressor TV, wherein A phase ac bus 31 is accessed in one end (Conn4) of derided capacitors C1, and the other end of derided capacitors C1 is by dividing
Voltage capacitance C2 ground connection, intermediate transformer TV include first winding A1 and secondary winding, and secondary winding includes residue winding A2 and master
Secondary winding A3, first winding A1 are connected on derided capacitors C2, and main secondary winding A3 accesses secondary load R1, remaining winding A2
Both ends (Conn5 and Conn6) access corresponding automatic harmonic elimination device 71.A compensation reactor is also concatenated on first winding A1
L1。
The model of capacitance type potential transformer 61First winding A1 specified phase voltage
28.56kV, remaining winding A2 voltage rating are 100/3V, rated capacity 50VA；Main secondary winding A3 specified phase voltage
57.74V rated capacity 50VA.Derided capacitors C1, derided capacitors C2 capacitance are 0.04uF；Compensation reactor L1 resistance value
For 321.3 Ω, reactance value 114H.The capacitive reactances of compensation reactor L1 effect compensation derided capacitors, minimizes secondary electricity
Pressure is with load variations.
The model of intermediate transformer TV use Simulink in saturation transformer module, the module to transformer one
Secondary side directly hinders and leakage reactance, and secondary side directly hinders and leakage reactance, and excitation resistance and magnetic saturation characteristic have corresponding parameter setting, can be compared with
The characteristic of true simulation real transformer.
The structure of automatic harmonic elimination device 71 is as shown in Figure 5 comprising gate level turn-off thyristor GTO1, gate electrode capable of switching off are brilliant
Brake tube GTO2, damping resistance Rm1, damping resistance Rm2 and impulse generator P1 and impulse generator P2, wherein gate pole can close
One end of cathode (k) the connection damping resistance Rm1 of disconnected thyristor GTO1, cathode (k) connection of gate level turn-off thyristor GTO2
One end of damping resistance Rm2；The connection of the anode (a) of gate level turn-off thyristor GTO1 and gate level turn-off thyristor GTO2 is formed
Terminal Conn7 is connect with one end (Conn5) of remaining winding A2；Damping resistance Rm1 is connected with the other end of damping resistance Rm2
Terminal Conn8 is formed, is connect with the other end (Conn6) of remaining winding A2；Gate level turn-off thyristor GTO1 and gate pole can close
The gate pole (g) of disconnected thyristor GTO2 is separately connected the output end of impulse generator P1 and impulse generator P2.
Automatic harmonic elimination device 71 also can decide whether generation ferromagnetic resonance simultaneously, and principle is by acquiring capacitive battery
It presses the remaining winding A2 voltage of mutual inductor 61 to carry out FFT transform, the amplitude and phase angle of voltage is obtained, when voltage magnitude is more than
1.3Un and when the duration is more than 0.5s, is judged as generation ferromagnetic resonance.When ferromagnetic resonance occurs for judgement, by gate pole
The gate pole (g) of turn-off thyristor GTO1 and gate level turn-off thyristor GTO2 apply positive pulse electric current and turn it on, and will damp
Resistance Rm1, damping resistance Rm2 access；When judging that ferromagnetic resonance disappears, by gate level turn-off thyristor GTO1 and gate pole
The gate pole (g) of turn-off thyristor GTO2 applies negative pulse current and turns it off, and damping resistance Rm1, damping resistance Rm2 are moved back
Out.Damping resistance Rm1 in automatic harmonic elimination device 71, damping resistance Rm2 resistance value can set, GTO1,
The time that GTO2 is turned on and off is also that can set.For simulation model in the present invention, Rm1, Rm2 resistance value are set
For 5-10 Ω, Rm1, Rm2 are put into simultaneously when investment, and 0.2s is divided between exit time can achieve best harmonic elimination effect, and not
Ferromagnetic resonance can be caused again when exiting.
Analysis of simulation result
Fig. 6 is the imitative of CVT primary side voltage after t=0.02s shunt capacitor group is put into, electric current and capacitor inrush phenomenon
True waveform.Only there is transient overvoltage in a cycle in the waveform of CVT voltage, and maximum value is about the 1.75 of voltage rating
Times.There is the higher harmonic current of amplitude in first cycle in transient current when capacitor is put into, but decays quickly.?
In the transient process of capacitor investment, also there is the high-frequency current that peak value is up to 20A in CVT primary side current, and the electric current is at one
Substantially 0 is decayed in cycle.Illustrate that in the transient process that capacitor is put into, CVT primary side voltage waveform is distorted, and is generated
Overvoltage and high frequency transient current, may cause ferromagnetic resonance.
Fig. 7 and Fig. 8 is respectively the simulation waveform of capacitor switching current Yu intermediate transformer voltage, and A phase is in voltage first phase
Angle is closed a floodgate when being 0, and C phase is closed a floodgate at 120 ° of voltage initial angle, and transient overvoltage and the transient current of C phase are apparently higher than A phase.It says
It is bright to inspire bigger harmonic current in voltage peaks combined floodgate, it closes a floodgate near zero, is not easy to inspire transient state
Harmonic current.
According to simulation analysis result: in the transient process of capacitor group investment, will lead to CVT primary side voltage wave
Shape distortion, occurs ferromagnetic resonance, generates overvoltage and high-frequency current.The size of overvoltage and capacitor bank lock moment voltage
Initial phase angle is related, and when combined floodgate initial phase angle is 90 °, the transient overvoltage inspired is maximum, it is easier to cause ferromagnetic resonance.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (2)
1. a kind of 35kV capacitance type potential transformer Simulation Model of Ferroresonance, which is characterized in that it include two group capacitors,
35kV ac bus, three-phase alternating current potential source, capacitance type potential transformer and ferromagnetic resonance judgment module and automatic harmonic elimination dress
It sets, in which:
Every group capacitor passes through corresponding breaker access 35kV ac bus, and the three-phase alternating current potential source access 35kV is handed over
Flow bus；The 35kV ac bus is three-phase alternating current bus, and each phase ac bus one ferromagnetic resonance of corresponding access is sentenced
Disconnected module, capacitance type potential transformer and automatic harmonic elimination device；
For judging whether ferromagnetic resonance occurs for the ferromagnetic resonance judgment module comprising ammeter, voltmeter and oscillography
Device, the ammeter are serially connected with capacitance type potential transformer primary side, and the voltmeter is connected on corresponding phase ac bus, institute
The output end for stating ammeter and voltmeter is connected to oscillograph；
The primary side of the capacitance type potential transformer is simultaneously connected on corresponding phase ac bus, and secondary side connects automatic harmonic elimination dress
It sets；
The automatic harmonic elimination device includes two gate level turn-off thyristors, two damping resistances and two impulse generators,
Wherein, the cathode of each gate level turn-off thyristor is connected respectively one end of a damping resistance, each gate electrode capable of switching off
The gate pole of thyristor is connected respectively the output end of an impulse generator, and the anode of two gate level turn-off thyristors connects
It is connected to one end of capacitance type potential transformer secondary side, the other end of two damping resistances is connected to capacitance type potential transformer
The other end of secondary side；
When ferromagnetic resonance occurs, while two impulse generators being made to generate positive pulse electric current, puts into damping resistance；When ferromagnetic humorous
After vibration disappears, two impulse generators is made to generate negative pulse current, first backed off after random damping resistance at a certain time interval；
The capacitance type potential transformer includes the first derided capacitors, the second derided capacitors, intermediate transformer, wherein described the
Corresponding phase ac bus is accessed in one end of one derided capacitors, and the other end is grounded by the second derided capacitors, the intermediate transformer
Including first winding and secondary winding, the secondary winding includes that remaining winding and main secondary winding, the first winding simultaneously connect
In on the second derided capacitors, the main secondary winding accesses secondary load, and the residue winding accesses corresponding automatic harmonic elimination dress
It sets；
The resistance value of two damping resistances is 5-10 Ω, and the time interval is 0.1-0.3s；
Every group capacitor is the three-phase dual star topology mode of connection.
2. 35kV capacitance type potential transformer Simulation Model of Ferroresonance according to claim 1, which is characterized in that described
A compensation reactor is also concatenated in first winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610508575.3A CN106205306B (en) | 2016-06-29 | 2016-06-29 | A kind of 35kV capacitance type potential transformer Simulation Model of Ferroresonance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610508575.3A CN106205306B (en) | 2016-06-29 | 2016-06-29 | A kind of 35kV capacitance type potential transformer Simulation Model of Ferroresonance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106205306A CN106205306A (en) | 2016-12-07 |
| CN106205306B true CN106205306B (en) | 2019-06-14 |
Family
ID=57462640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610508575.3A Active CN106205306B (en) | 2016-06-29 | 2016-06-29 | A kind of 35kV capacitance type potential transformer Simulation Model of Ferroresonance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106205306B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108020805B (en) * | 2018-01-09 | 2020-02-07 | 广东电网有限责任公司电力科学研究院 | Ferromagnetic resonance judgment method and system for voltage transformer of power distribution network |
| CN108767815B (en) * | 2018-07-17 | 2024-02-02 | 云南电网有限责任公司红河供电局 | Automatic bypass resonance elimination device of electromagnetic voltage transformer |
| CN111813000B (en) * | 2020-06-11 | 2023-04-11 | 广西电网有限责任公司电力科学研究院 | Method and device for simulating ferromagnetic resonance of power distribution network real-time test platform |
| CN115994505B (en) * | 2023-03-24 | 2023-06-06 | 山东泰开互感器有限公司 | Defect simulation model system of capacitive voltage transformer and implementation method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104681261A (en) * | 2013-11-26 | 2015-06-03 | 国家电网公司 | Equipotential mask capacitor type voltage transformer |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006310692A (en) * | 2005-05-02 | 2006-11-09 | Kansai Electric Power Co Inc:The | Capacitance potential device |
| CN203014389U (en) * | 2012-12-30 | 2013-06-19 | 浙江紫光电器有限公司 | High-voltage reactive power automatic compensation device |
| CN105261268A (en) * | 2015-11-24 | 2016-01-20 | 国网重庆市电力公司电力科学研究院 | Simulation model for voltage transformer ferromagnetic resonance |
-
2016
- 2016-06-29 CN CN201610508575.3A patent/CN106205306B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104681261A (en) * | 2013-11-26 | 2015-06-03 | 国家电网公司 | Equipotential mask capacitor type voltage transformer |
Non-Patent Citations (3)
| Title |
|---|
| 应用MATLAB/SIMULINK仿真研究铁磁谐振;杜志叶等;《高电压技术》;20040930;第30卷(第9期);30-32页 |
| 投切10kV并联电容器的暂态过程研究;欧阳沙;《中国优秀硕士论文全文数据库》;20140401;文正文第38页 |
| 铁磁谐振仿真模型的改进;杜志叶等;《继电器》;20040416;第32卷(第8期);25-29页 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106205306A (en) | 2016-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106205306B (en) | A kind of 35kV capacitance type potential transformer Simulation Model of Ferroresonance | |
| CN102680861B (en) | System and method for testing short circuit withstanding capability of transformer or electric reactor | |
| CN103368167A (en) | Single-phase earth fault fundamental current full compensation device and method | |
| Wang et al. | Novel arc-suppression methods based on cascaded H-bridge converter | |
| CN110086161A (en) | A kind of magnetism-regulating type arc suppression coil earthing system | |
| CN103472393A (en) | Wind turbine power generation set high voltage ride through test system | |
| Corzine | Circuit breaker for DC micro grids | |
| CN110661241B (en) | Method, device and equipment for suppressing inrush current of transformer | |
| CN203117319U (en) | Combination waveform generator | |
| CN203774191U (en) | Power-saving type AC contactor with threshold voltage control | |
| CN112824911A (en) | Device for testing arc suppression coil | |
| CN203491701U (en) | Harmonic-resistant intelligent integrated power capacitor | |
| CN206960539U (en) | The harmonic elimination apparatus of capacitance type potential transformer | |
| CN205120872U (en) | Test platform suitable for an even number converter | |
| Zheng et al. | Protection schemes for turn-to-turn faults within control windings of TCT-CSR and impacts of power regulation | |
| CN208433915U (en) | A kind of high-voltage variable frequency power source | |
| CN203519775U (en) | Circuit for testing series capacitor overload tolerance capacity | |
| CN209878955U (en) | Medium-voltage load cabinet | |
| CN208224331U (en) | A kind of wideband resonance potential generator | |
| CN209591247U (en) | It is a kind of simulate ferromagnetic resonance electric power teaching and experimental provision | |
| Wang et al. | A new phase selection method for single-phase grounding faults in distribution networks with full compensation arc suppression technology | |
| CN201994682U (en) | Serial connection reactor for parallel connection capacitor group | |
| CN201945650U (en) | Performance test system for high-capacity reactive power dynamic compensating device | |
| CN103558537B (en) | The circuit of test series capacitor tolerance capability of overload and method of work thereof | |
| CN215005698U (en) | Device for detecting turn-to-turn insulation performance of three-phase iron core reactor |
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 |