CN109617095A - A new harmonic elimination device - Google Patents
A new harmonic elimination device Download PDFInfo
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- CN109617095A CN109617095A CN201811573700.4A CN201811573700A CN109617095A CN 109617095 A CN109617095 A CN 109617095A CN 201811573700 A CN201811573700 A CN 201811573700A CN 109617095 A CN109617095 A CN 109617095A
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- 230000008030 elimination Effects 0.000 title claims abstract description 24
- 238000003379 elimination reaction Methods 0.000 title claims abstract description 24
- 239000003990 capacitor Substances 0.000 claims abstract description 23
- 230000007935 neutral effect Effects 0.000 claims abstract description 11
- 238000004804 winding Methods 0.000 claims description 77
- 238000013016 damping Methods 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 3
- 230000005350 ferromagnetic resonance Effects 0.000 abstract description 5
- 230000000903 blocking effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000005764 inhibitory process Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000002401 inhibitory effect Effects 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 231100000749 chronicity Toxicity 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000005291 magnetic effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
本申请提供了一种新型消谐装置，包括电压互感器、一次消谐器、电容器及晶闸管控制开关K及控制器，在系统正常运行时，晶闸管控制开关K闭合，此时相当于电压互感器一次中性点直接接地，因此此时零序阻抗最小，从而起到抑制3次谐波电压的作用，避免3次谐波电压长期性超标；当控制器检测到系统单相接地故障时，此时控制器发出断开晶闸管控制开关K的指令，系统迅速断开晶闸管控制开关K，消谐器和电容器迅速传入电压互感器一次回路中，电容器起到隔直流分量作用，消谐器和电容器共同作用，起到抑制涌流和抑制铁磁谐振作用，并且可提高电压互感器抗饱和特性能力，从而预防电压互感器一次熔断器的频繁熔断。
The application provides a novel harmonic elimination device, including a voltage transformer, a primary harmonic elimination, a capacitor, a thyristor control switch K and a controller. When the system is in normal operation, the thyristor control switch K is closed, which is equivalent to a voltage transformer. The primary neutral point is directly grounded, so the zero-sequence impedance is the smallest at this time, so as to suppress the 3rd harmonic voltage and prevent the 3rd harmonic voltage from exceeding the standard for a long time; when the controller detects the single-phase grounding fault of the system, this When the controller sends an instruction to disconnect the thyristor control switch K, the system quickly disconnects the thyristor control switch K, and the harmonic eliminator and capacitor are quickly introduced into the primary circuit of the voltage transformer. The capacitor plays the role of blocking the DC component, and the harmonic eliminator and capacitor Working together, it can suppress inrush current and ferromagnetic resonance, and can improve the anti-saturation characteristics of the voltage transformer, thereby preventing the frequent fusing of the primary fuse of the voltage transformer.
Description
Technical field
This application involves technical field of power systems more particularly to a kind of novel harmonic elimination apparatus.
Background technique
When the electric current in singlephase earth fault or electric system, which occurs, for electric system larger fluctuation, it will iron occurs
Magnetic resonance phenomenon, makes electric system generate resonance overvoltage, and higher resonance overvoltage can cause the voltage in electric system mutual
Sensor explodes, the fuse of voltage transformer is burnt, and directly threatens the safe operation of electric system.
Currently, generalling use 2 kinds of methods to inhibit ferromagnetic resonance.First, harmonic elimination of connecting between PT neutral point and the earth
Device, impedance is usually in 400 Europe or so；Second, it installs small resistance additional at voltage transformer secondary open-delta, carries out secondary disappear
It is humorous, to inhibit high frequency ferromagnetic resonance.But the application of this mode also brings large effect, wherein most serious of all, when being
System is safely operated band to metering and protective device there are when 3 subharmonic current, causing 3 subharmonic voltage containing ratios to severely exceed
Carry out large effect.
In addition, capacity current is larger over the ground when there is longer cable or overhead transmission line in 10kV or 35kV system.Work as hair
When raw singlephase earth fault, fault current includes biggish low frequency component.If being grounded when in system without installing arc-extinction device additional
Failover procedure, ungrounded opposite voltage transformer first winding are discharged, and low frequency component discharges rapidly, and easily causes mutual induction of voltage
Device once insures frequent fusing.
In view of generality existing for problem above, need to existing harmonic elimination apparatus carry out technology upgrading transformation so that its simultaneously
Has the ability for inhibiting 3 subharmonic voltages and prevention fuse of voltage transformer frequently to fuse.
Summary of the invention
This application provides a kind of novel harmonic elimination apparatus, to solve the problems, such as the inhibition of 3 subharmonic and voltage transformer one simultaneously
The technical issues of secondary fuse frequently fuses.
In order to solve the above-mentioned technical problem, the embodiment of the present application discloses following technical solution:
This application provides a kind of novel harmonic elimination apparatus, including voltage transformer, a resonance eliminator, capacitor and thyristor
Control switch K and controller, in which:
The voltage transformer and a resonance eliminator are connected in series；
Resonance eliminator is connected in series and is grounded with the capacitor；
The neutral point D of the voltage transformer is connected in series and is grounded with the thyristor control switch K；
The harmonic elimination modules in parallel thyristor control switch K in series with a resonance eliminator and the capacitor
Connection；
The thyristor control switch K is electrically connected with one end of the controller.
Preferably, described device further includes three phase mains, and the three phase mains includes A phase power supply, B phase power supply and C phase electricity
Source.
Preferably, described device further includes secondary resonance eliminator, and the secondary resonance eliminator is in parallel with the voltage transformer, institute
Secondary resonance eliminator is stated to be electrically connected with the other end of the controller；
The secondary resonance eliminator includes three-phase five-limb reactor and damping resistance；
The three-phase five-limb reactor includes reactor primary winding and reactor secondary windings；
The reactor primary winding includes the first reactor primary winding, the second reactor primary winding and third reactance
Device armature winding；
The reactor secondary windings includes the first reactor secondary windings, the second reactor secondary windings and third reactance
Device secondary windings, the first reactor secondary windings, the second reactor secondary windings and third reactor secondary windings are successively
It is connected into open delta, one end ground connection of the open delta, the other end are connect with one end of the damping resistance, the damping
The other end of resistance is grounded.
Preferably, the voltage transformer is electromagnetic potential transformer, and the voltage transformer includes transformer primary
Winding and transformer secondary winding；
The transformer primary winding includes the first transformer primary winding, the second transformer primary winding and third mutual inductance
Device armature winding；
One end of first transformer primary winding, the second transformer primary winding and third transformer primary winding respectively with
The A phase power supply, B phase power supply are connected with C phase power supply.
Preferably, described device is suitable for 10KV or 35KV distribution network system.
Compared with prior art, the application has the beneficial effect that
This application provides a kind of novel harmonic elimination apparatus, including voltage transformer, a resonance eliminator, capacitor and thyristor
Control switch K and controller, in which: voltage transformer and a resonance eliminator are connected in series；One time resonance eliminator is connected with capacitor
Connect and ground；The neutral point D of voltage transformer is connected in series and is grounded with thyristor control switch K；Thyristor control switch K
The harmonic elimination modules in parallel in series with a resonance eliminator and capacitor is connect；Thyristor control switch K and the controller
One end electrical connection.When system operates normally, it is once neutral to be equivalent to voltage transformer at this time for thyristor control switch K closure
Point is directly grounded, therefore zero sequence impedance is minimum at this time, to play the role of inhibiting 3 subharmonic voltages, avoids 3 subharmonic voltages
Chronicity is exceeded；When controller detects system single-phase earth fault, controller, which issues, at this time disconnects thyristor control switch K
Instruction, system disconnects rapidly thyristor control switch K, and a resonance eliminator and capacitor are passed to rapidly voltage transformer and once return
Lu Zhong, capacitor play the role of blocking flow component, a resonance eliminator and capacitor collective effect, play inhibition and shove and inhibit iron
Magnetic resonance effect, and voltage transformer anti-saturation performance capabilities can be improved, to prevent fuse of voltage transformer
Frequently fusing.Therefore a kind of novel harmonic elimination apparatus provided by the present application, which is provided simultaneously with, inhibits 3 subharmonic voltages and prevention voltage mutual
The ability that fuse of sensor frequently fuses.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
The application can be limited.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without creative efforts, also
Other drawings may be obtained according to these drawings without any creative labor.
Fig. 1 is a kind of structural schematic diagram of novel harmonic elimination apparatus provided by the present application.
Description of symbols: 1- voltage transformer, resonance eliminator of 2-, 3- capacitor, 4- thyristor control switch K, 5-
Controller, bis- resonance eliminators of 6-, 7- three-phase five-limb reactor, 8- damping resistance, 71- reactor primary winding, 72- reactor
Secondary windings, 711- the first reactor primary winding, 712- the second reactor primary winding, 713- third reactor primary around
Group, 721- the first reactor secondary windings, 722- the second reactor secondary windings, 723- third reactor secondary windings, 11-
One transformer primary winding, 12- the first transformer primary winding, 13- the first transformer primary winding.
Specific embodiment
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described implementation
Example is only some embodiments of the present application, rather than whole embodiments.Based on the embodiment in the application, the common skill in this field
The application protection all should belong in art personnel every other embodiment obtained without making creative work
Range.
This application provides a kind of novel harmonic elimination apparatus, including 1, resonance eliminator 2 of voltage transformer, capacitor 3 and crystalline substance
Brake tube control switch K4 and controller 5, in which:
The voltage transformer 1 is connected in series with a resonance eliminator 2；Specifically, a resonance eliminator 2 in the application
For SiC resonance eliminator, the resistive element of a resonance eliminator is that base-material is formed through high-temperature roasting with SiC, and one time resonance eliminator 2 plays inhibition
The function of ferromagnetic resonance.
Resonance eliminator 2 is connected in series and is grounded with the capacitor 3；
The neutral point D of the voltage transformer 1 is connected in series and is grounded with the thyristor control switch K4；
The harmonic elimination component thyristor control switch K4 in series with a resonance eliminator 2 and the capacitor 3
It is connected in parallel；
The thyristor control switch K4 is electrically connected with one end of the controller 5.
Compared with other switches, thyristor control switch has many advantages, such as to be swift in motion, is contactless, in system normal operation
When, thyristor control switch K4 closure is equivalent to 1 neutral-point solid ground of voltage transformer, therefore zero sequence at this time at this time
Impedance is minimum, to play the role of inhibiting 3 subharmonic voltages, avoids 3 subharmonic voltage chronicity exceeded；When controller 5 is examined
When measuring system single-phase earth fault, controller 5 issues the instruction for disconnecting thyristor control switch K4 at this time, and system disconnects rapidly
Rapidly in the primary circuit of incoming voltage transformer 1, capacitor 3 is risen for thyristor control switch K, a resonance eliminator 2 and capacitor 3
It is acted on to blocking flow component, 3 collective effect of a resonance eliminator 2 and capacitor, plays the role of inhibition and shove and inhibit ferromagnetic resonance,
And 1 anti-saturation performance capabilities of voltage transformer can be improved, to prevent the frequent fusing of No. 1 fuses of voltage transformer.
Therefore a kind of novel harmonic elimination apparatus provided by the present application, which is provided simultaneously with, inhibits 3 subharmonic voltages and prevention voltage transformer 1 primary
The ability that fuse frequently fuses.
Further, described device further includes three phase mains, and the three phase mains includes A phase power supply, B phase power supply and C phase
Power supply.
Described device further includes secondary resonance eliminator 6, and the secondary resonance eliminator is in parallel with the voltage transformer, described secondary
Resonance eliminator 6 is electrically connected with the other end of the controller 5；The inside of controller 5 issues instruction control thyristor and realizes secondary disappear
The throwing of humorous device 6 is moved back；Secondary resonance eliminator 6 has demagnetizing effect in Ferroresonance Process, plays the role of harmonic elimination.
The secondary resonance eliminator 6 includes three-phase five-limb reactor 7 and damping resistance 8；
The three-phase five-limb reactor 7 includes reactor primary winding 71 and reactor secondary windings 72；
The reactor primary winding 71 includes the first reactor primary winding 711,712 and of the second reactor primary winding
Third reactor primary winding 713；
The reactor secondary windings 72 includes the first reactor secondary windings 721,722 and of the second reactor secondary windings
Third reactor secondary windings 723, the first reactor secondary windings 721, the second reactor secondary windings 722 and third electricity
Anti- device secondary windings 723 is sequentially connected in series into open delta, one end ground connection, the other end and the damping resistance of the open delta
8 one end connection, the other end ground connection of the damping resistance 8.
It is in the embodiment of the present invention that secondary resonance eliminator 6 is in parallel with voltage transformer 1, so that secondary resonance eliminator 6 is become neutral point
The Low ESR leakage path of isolated neutral system capacitive earth current, so as to avoid capacitive earth current to voltage transformer 1 and
The impact of voltage transformer fuse effectively prevents voltage transformer 1 to burn, voltage transformer fuse blows；It is secondary to disappear
Humorous device 6 is in parallel with voltage transformer 1, can release in time to isolated neutral system capacitive earth current, makes
Property point isolated neutral system increase current detecting and control circuit, increase stability, the safety and reliability of system operation.
Specifically, the voltage transformer 1 is electromagnetic potential transformer, at the beginning of the voltage transformer 1 includes mutual inductor
Grade winding and transformer secondary winding；
The transformer primary winding includes the first transformer primary winding 11, the second transformer primary winding 12 and third
Transformer primary winding 13；
One end of first transformer primary winding 11, the second transformer primary winding 12 and third transformer primary winding 13
It is connect respectively with the A phase power supply, B phase power supply and C phase power supply.
Described device is suitable for 10KV or 35KV distribution network system.
Since embodiment of above is that reference combination is illustrated on other modes, have between different embodiments
There is identical part, identical, similar part may refer to each other between each embodiment in this specification.Herein no longer in detail
It illustrates.
Those skilled in the art will readily occur to its of the application after considering specification and practicing the disclosure invented here
His embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows the general principle of the application and including the undocumented common knowledge in the art of the application
Or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the application are wanted by right
The content asked is pointed out.
Above-described the application embodiment does not constitute the restriction to the application protection scope.
Claims (5)
1. a kind of novel harmonic elimination apparatus, which is characterized in that including voltage transformer (1), a resonance eliminator (2), capacitor (3) and
Thyristor control switch K (4) and controller (5), in which:
The voltage transformer (1) and a resonance eliminator (2) are connected in series；
Resonance eliminator (2) is connected in series and is grounded with the capacitor (3)；
The neutral point D of the voltage transformer (1) is connected in series and is grounded with the thyristor control switch K (4)；
The thyristor control switch K (4) the harmonic elimination group in series with a resonance eliminator (2) and the capacitor (3)
Part is connected in parallel；
The thyristor control switch K (4) is electrically connected with one end of the controller (5).
2. novel harmonic elimination apparatus according to claim 1, which is characterized in that described device further includes three phase mains, described
Three phase mains includes A phase power supply, B phase power supply and C phase power supply.
3. novel harmonic elimination apparatus according to claim 1, which is characterized in that described device further includes secondary resonance eliminator (6),
The secondary resonance eliminator (6) is in parallel with the voltage transformer (1), and the secondary resonance eliminator (6) is another with the controller (5)
One end electrical connection；
The secondary resonance eliminator (6) includes three-phase five-limb reactor (7) and damping resistance (8)；
The three-phase five-limb reactor (7) includes reactor primary winding (71) and reactor secondary windings (72)；
The reactor primary winding (71) includes the first reactor primary winding (711), the second reactor primary winding (712)
With third reactor primary winding (713)；
The reactor secondary windings (72) includes the first reactor secondary windings (721), the second reactor secondary windings (722)
With third reactor secondary windings (723), the first reactor secondary windings (721), the second reactor secondary windings (722)
Open delta, one end ground connection, the other end and the institute of the open delta are sequentially connected in series into third reactor secondary windings (723)
State one end connection of damping resistance (8), the other end ground connection of the damping resistance (8).
4. novel harmonic elimination apparatus according to claim 1, which is characterized in that the voltage transformer (1) is electromagnetic type electricity
Mutual inductor is pressed, the voltage transformer (1) includes transformer primary winding and transformer secondary winding；
The transformer primary winding includes the first transformer primary winding (11), the second transformer primary winding (12) and third
Transformer primary winding (13)；
The one of first transformer primary winding (11), the second transformer primary winding (12) and third transformer primary winding (13)
End is connect with the A phase power supply, B phase power supply and C phase power supply respectively.
5. novel harmonic elimination apparatus according to claim 1, which is characterized in that described device is suitable for 10KV or 35KV distribution
Net system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811573700.4A CN109617095A (en) | 2018-12-21 | 2018-12-21 | A new harmonic elimination device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811573700.4A CN109617095A (en) | 2018-12-21 | 2018-12-21 | A new harmonic elimination device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109617095A true CN109617095A (en) | 2019-04-12 |
Family
ID=66010337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811573700.4A Pending CN109617095A (en) | 2018-12-21 | 2018-12-21 | A new harmonic elimination device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109617095A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110994578A (en) * | 2019-12-15 | 2020-04-10 | 云南电网有限责任公司文山供电局 | Refined primary harmonic elimination equipment based on temperature control and control method |
| CN119401363A (en) * | 2025-01-02 | 2025-02-07 | 西安工程大学 | High-voltage side surge suppression device and method for voltage transformer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994024751A1 (en) * | 1993-04-13 | 1994-10-27 | Electric Power Research Institute | Transient damping thyristor controlled series capacitor system |
| CN103855704A (en) * | 2014-03-28 | 2014-06-11 | 安徽巨森电器有限公司 | Primary and secondary combined resonance elimination device |
| CN107332219A (en) * | 2017-07-10 | 2017-11-07 | 合肥东玖电气有限公司 | A kind of harmonic elimination system for microcomputer |
-
2018
- 2018-12-21 CN CN201811573700.4A patent/CN109617095A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994024751A1 (en) * | 1993-04-13 | 1994-10-27 | Electric Power Research Institute | Transient damping thyristor controlled series capacitor system |
| CN103855704A (en) * | 2014-03-28 | 2014-06-11 | 安徽巨森电器有限公司 | Primary and secondary combined resonance elimination device |
| CN107332219A (en) * | 2017-07-10 | 2017-11-07 | 合肥东玖电气有限公司 | A kind of harmonic elimination system for microcomputer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110994578A (en) * | 2019-12-15 | 2020-04-10 | 云南电网有限责任公司文山供电局 | Refined primary harmonic elimination equipment based on temperature control and control method |
| CN110994578B (en) * | 2019-12-15 | 2021-09-21 | 云南电网有限责任公司文山供电局 | Refined primary harmonic elimination equipment based on temperature control and control method |
| CN119401363A (en) * | 2025-01-02 | 2025-02-07 | 西安工程大学 | High-voltage side surge suppression device and method for voltage transformer |
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Application publication date: 20190412 |