CN206195343U - Harmonic elimination device and system - Google Patents
Harmonic elimination device and system Download PDFInfo
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- CN206195343U CN206195343U CN201621252928.XU CN201621252928U CN206195343U CN 206195343 U CN206195343 U CN 206195343U CN 201621252928 U CN201621252928 U CN 201621252928U CN 206195343 U CN206195343 U CN 206195343U
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- reactor
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- harmonic elimination
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Abstract
The utility model relates to a harmonic elimination device and system, harmonic elimination device include three -phase pentastyle reactor and damping resistance, and three -phase pentastyle reactor includes reactor primary winding and reactor secondary, reactor primary winding's the parallelly connected ground connection of one end, and the other end is used for connecting three phase current, and reactor secondary establishes ties into the opening triangle, and the triangular one end ground connection of opening, the other end are connected with damping resistance's one end, damping resistance's other end ground connection. The harmonic elimination system includes electromagnetic type voltage transformer, three phase current and above -mentioned harmonic elimination device. The harmonic elimination device and system that this embodiment provided, when electric power system took place phase to earth fault, the low impedance that the provides grounding capacitance and current passageway of releasing had prevented effectively that electromagnetic type voltage transformer from burning out, the fusing of electromagnetic type voltage transformer fuse, has strengthened stability, security and the reliability of electric power system operation.
Description
Technical field
The utility model is related to technical field of power systems, more particularly to a kind of harmonic elimination apparatus and system.
Background technology
When the electric current that power system occurs in singlephase earth fault or power system has larger fluctuation, it will iron occurs
Magnetic resonance phenomenon, makes power system produce resonance overvoltage, and resonance overvoltage can cause the voltage in power system mutual higher
Sensor blast, the fuse of voltage transformer burn, and directly threaten the safe operation of power system.
In correlation technique, for the ferromagnetic resonance produced in power system, carrying out harmonic elimination using preset arc suppression coil is
A kind of effective settling mode.Refer to when power system is in normal operating conditions, in advance using preset arc suppression coil harmonic elimination
Arc suppression coil is first adjusted to correct position, the electric current phase approximate with capacitance current size in power system of arc suppression coil is flowed through
Deng after earth fault occurs in power system, the neutral point voltage of power system (is carried in the electricity on preset arc suppression coil
Pressure) will raise, preset arc suppression coil is produced inductive current over the ground, so as to be mended to the capacitance current in power system
Repay, and then avoid the generation of ferromagnetic resonance.
But, preset arc suppression coil is only applicable to the power system of neutral ground, for the electricity of isolated neutral
The low current power system of Force system, such as capacitance current less than 10A, lacks a kind of efficiently and effectively harmonic elimination apparatus at present.
Utility model content
To overcome problem present in correlation technique, the utility model provides a kind of harmonic elimination apparatus and system.
According to the first aspect of the utility model embodiment, there is provided a kind of harmonic elimination apparatus, including three-phase five-limb reactor
And damping resistance, wherein：
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 the 3rd reactor primary winding, first electricity
One end earth of anti-device armature winding, the second reactor primary winding and the 3rd reactor primary winding, first electricity
The other end of anti-device armature winding, the second reactor primary winding and the 3rd reactor primary winding is used to connect three phase mains；
The reactor secondary windings includes the first reactor secondary windings, the second reactor secondary windings and the 3rd reactance
Device secondary windings, the first reactor secondary windings, the second reactor secondary windings and the 3rd reactor secondary windings are successively
Open delta is connected into, one end ground connection of the open delta, the other end are connected with one end of the damping resistance, the damping
The other end ground connection of resistance.
Preferably, the return yoke of the three-phase five-limb reactor is provided with air gap, and the size of gaps is 5~15mm.
According to the second aspect of the utility model embodiment, there is provided a kind of harmonic elimination system, including electromagnetic potential transformer,
Harmonic elimination apparatus in three phase mains and such scheme, wherein：
First reactor primary winding of the harmonic elimination apparatus, the second reactor primary winding and the 3rd reactor primary around
The other end of group is connected with the A phases power supply in the three phase mains, B phases power supply and C phase power supplys respectively；
The electromagnetic potential 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 the 3rd transformer primary winding, and described first is mutual
One end earth of sensor armature winding, the second transformer primary winding and the 3rd transformer primary winding, described first is mutual
The other end of sensor armature winding, the second transformer primary winding and the 3rd transformer primary winding respectively with the A phases power supply,
B phases power supply and C phases power supply are connected.
Preferably, when the harmonic elimination system is used for 10kV system harmonic eliminations, the rated voltage of the open delta is 500V,
The damping resistance is 20 Ω~45 Ω.
Preferably, the reactance value of the three-phase five-limb reactor is less than or equal to the electromagnetic potential transformer reactance
/ 10th of value.
Preferably, when the harmonic elimination system is used for 10kV system harmonic eliminations, the resistance of the harmonic elimination apparatus is 1k Ω~10k
Ω, induction reactance are 3k Ω~6k Ω.
Preferably, when the harmonic elimination system is used for 35kV system harmonic eliminations, the resistance of the harmonic elimination apparatus is 5k Ω~30k
Ω, induction reactance are 11k Ω~22k Ω.
The technical scheme that embodiment of the present utility model is provided can include the following benefits：
The harmonic elimination apparatus that the present embodiment is provided, including three-phase five-limb reactor and damping resistance.What the present embodiment was provided
Harmonic elimination system includes electromagnetic potential transformer, three phase mains and above-mentioned harmonic elimination apparatus, is applied to capacitance current less than in 10A
Property point isolated neutral system.It is when isolated neutral system carries out harmonic elimination, harmonic elimination apparatus are in parallel with electromagnetic potential transformer,
Harmonic elimination apparatus are made to turn into the Low ESR leakage path of isolated neutral system capacitive earth current, so as to avoid direct-to-ground capacitance
Impact of the electric current to electromagnetic potential transformer and electromagnetic potential transformer fuse, effectively prevent electromagnetic potential mutual inductance
Device burns, electromagnetic potential transformer fuse blows；Harmonic elimination apparatus are in parallel with electromagnetic potential transformer, i.e., can be right in time
Isolated neutral system capacitive earth current is released, and makes isolated neutral system avoid increasing current detecting and control
Circuit, enhances stability, the safety and reliability of isolated neutral system operation.
It should be appreciated that the general description of the above and detailed description hereinafter are only exemplary and explanatory, not
The utility model can be limited.
Brief description of the drawings
Accompanying drawing herein is merged in specification and constitutes the part of this specification, shows and meets of the present utility model
Embodiment, and be used to explain principle of the present utility model together with specification.
In order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the accompanying drawing to be used needed for description of the prior art is briefly described, it should be apparent that, for ordinary skill people
For member, without having to pay creative labor, other accompanying drawings can also be obtained according to these accompanying drawings.
A kind of structural representation of harmonic elimination apparatus that Fig. 1 is provided for the utility model embodiment；
The structure of reactor primary winding in a kind of three-phase five-limb reactor that Fig. 2 is provided for the utility model embodiment
Schematic diagram；
A kind of structural representation of harmonic elimination system that Fig. 3 is provided for the utility model embodiment；
A kind of equivalent circuit of harmonic elimination system access isolated neutral system that Fig. 4 is provided for the utility model embodiment
Schematic diagram；
In Fig. 1-4, symbol is expressed as：
11- the first reactor primary windings, 12- the second reactor primary windings, the reactor primary windings of 13- the 3rd, 21-
First reactor secondary windings, 22- the second reactor secondary windings, the reactor secondary windings of 23- the 3rd, 3- damping resistances, 4-
Air gap, 51- the first transformer primary windings, 52- the second transformer primary windings, the transformer primary windings of 53- the 3rd.
Specific embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Following description is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in implementation method do not represent all implementation methods consistent with the utility model.Conversely, they be only with such as
The example of the consistent apparatus and method of some aspects being described in detail in appended claims, of the present utility model.
The harmonic elimination apparatus that this implementation is provided, are applied to isolated neutral system of the capacitance current less than 10A, for neutrality
Point isolated neutral system, due to that can not realize eliminating ferromagnetic humorous by way of property point in systems connects harmonic elimination apparatus and is grounded
Shake, the safe operation of system is seriously threatened.
It is a kind of structural representation of the harmonic elimination apparatus according to an exemplary embodiment referring to Fig. 1, as shown in figure 1,
The harmonic elimination apparatus that the present embodiment is provided, including three-phase five-limb reactor and damping resistance 3.
Specifically, three-phase five-limb reactor includes reactor primary winding and reactor secondary windings.Reactor primary
Winding includes the first reactor primary winding 11, the second reactor primary winding 12 and the 3rd reactor primary winding 13.First
Reactor primary winding 11, a Same Name of Ends of the second reactor primary winding 12 and the 3rd reactor primary winding 13 simultaneously couple
Ground, another of the first reactor primary winding 11, the second reactor primary winding 12 and the 3rd reactor primary winding 13 is same
Name end is used to connect three phase mains.In the present embodiment, three phase mains is the A phases power supply of isolated neutral system, B phases power supply and
C phase power supplys.
Reactor secondary windings includes the first reactor secondary windings 21, the second reactor secondary windings 22 and the 3rd reactance
Device secondary windings 23, the first reactor secondary windings 21, the second reactor secondary windings 22 and the 3rd reactor secondary windings 23
Open delta is sequentially connected in series into, one end of the Same Name of Ends ground connection, another Same Name of Ends and damping resistance 3 of open delta connects
Connect, the other end ground connection of damping resistance 3.
Further, the side of the three-phase five-limb reactor in the harmonic elimination apparatus that the present embodiment is provided is gripped and is additionally provided with air gap 4,
Referring to Fig. 2, the structure of reactor primary winding is shown in a kind of three-phase five-limb reactor provided for the utility model embodiment
It is intended to.As shown in Fig. 2 reactor primary winding is also gripped including 2 sides, side is gripped and is provided with air gap 4.Three-phase five-limb reactor
Side is gripped can be by zero sequence fluxes, and the air gap 4 gripped by side forms zero sequence fluxes loop, makes three-phase five-limb reactor
Equivalent to zero-sequence reactor, so that after isolated neutral system occurs singlephase earth fault, in three-phase five-limb reactor
Three-phase reactor armature winding can be by zero-sequence current.
In the present embodiment, the 5~15mm that is preferably sized to of air gap 4 is gripped on side, and the number of air gap 4 is 2.By on side
Setting air gap 4 is gripped, makes the zero-sequence current by three-phase five-limb reactor more than 1A, so as to play a part of leakage current,
And make the zero-sequence current for passing through still within the scope of the rated current of three-phase five-limb reactor.Certainly, using the present embodiment
When the harmonic elimination apparatus of offer carry out harmonic elimination, the length that the number of air gap 4 can be gripped according to side makes appropriate adjustment, all should belong to this reality
With new protection domain.
The harmonic elimination system that the present embodiment is provided, is applied to isolated neutral system of the capacitance current less than 10A, for right
The resonance overvoltage that ferromagnetic resonance is produced is eliminated.Referring to Fig. 3, for a kind of harmonic elimination system that the utility model embodiment is provided
Structural representation.As shown in figure 3, harmonic elimination system includes electromagnetic potential transformer, three phase mains and above-mentioned harmonic elimination apparatus.
Specifically, the first reactor primary winding 11 of harmonic elimination apparatus, the second reactor primary winding 12 and the 3rd reactance
Another Same Name of Ends of device armature winding 13 is connected with the A phases power supply in three phase mains, B phases power supply and C phase power supplys respectively.
Electromagnetic potential transformer includes transformer primary winding and transformer secondary winding, and transformer primary winding includes
At the beginning of first transformer primary winding 51, the second transformer primary winding 52 and the 3rd transformer primary winding 53, the first transformer
One Same Name of Ends earth of level winding 51, the second transformer primary winding 52 and the 3rd transformer primary winding 53, first
Another Same Name of Ends difference of transformer primary winding 51, the second transformer primary winding 52 and the 3rd transformer primary winding 53
It is connected with A phases power supply, B phases power supply and C phase power supplys.
Further, ten of the reactance value of three-phase five-limb reactor less than or equal to electromagnetic potential transformer reactance value
/ mono-.
When harmonic elimination system is used for 10kV system harmonic eliminations, the rated voltage of open delta is 500V, and damping resistance 3 is 20 Ω
~45 Ω.The resistance of harmonic elimination apparatus is 1k Ω~10k Ω, induction reactance is 3k Ω~6k Ω.
When harmonic elimination system is used for 35kV system harmonic eliminations, the resistance of harmonic elimination apparatus is 5k Ω~30k Ω, induction reactance is 11k Ω
~22k Ω.
Referring to Fig. 4, a kind of harmonic elimination system access isolated neutral system provided for the utility model embodiment etc.
Effect circuit diagram.As shown in figure 4, ground connection transition resistances of the Rd for isolated neutral system, K is equivalent earthed switch, Ua
It is ground connection phase voltage, i.e. A phase voltages, Rz is equivalent damping resistance 3, and Lwb is three-phase five-limb reactor, and FU is electromagnetic type electricity
Pressure transformer fuse, Lpt is the inductance of electromagnetic potential transformer, and Lpt/3 is an equivalent of electromagnetic potential transformer
Inductance, 3C0 is the equivalent zero sequence electric capacity of isolated neutral system, and R0 is the equivalent resistance to earth of isolated neutral system,
R0/3 is an equivalent resistance to earth of R0, and U00 is three-phase imbalance voltage.In the utility model embodiment, three-phase five-limb
The rated voltage of reactor split shed triangle takes 500V, and the Ω of 3 value of damping resistance 40, the current in resistance property that harmonic elimination apparatus are provided is about
1A, inductance current 1A~2A, corresponding harmonic elimination apparatus total impedance Rz are about 6k Ω, and total reactance XLwb is about 3k Ω~6k Ω.And
Substantially in more than 1M Ω, the inductance Lpt/3 of electromagnetic potential transformer is about 300k Ω for the impedance of electromagnetic potential transformer.
As can be seen here, harmonic elimination system the releasing there is provided impedance path for direct-to-ground capacitance that the utility model is provided, so as to avoid letting out
Impact of the discharge stream to electromagnetic potential transformer and electromagnetic potential transformer fuse.
As seen from the above-described embodiment, this implementation is provided harmonic elimination apparatus and system, are applied to capacitance current less than in 10A
Property point isolated neutral system.It is when isolated neutral system carries out harmonic elimination, harmonic elimination apparatus are in parallel with electromagnetic potential transformer,
Harmonic elimination apparatus are made to turn into the Low ESR leakage path of isolated neutral system capacitive earth current, so as to avoid direct-to-ground capacitance
Impact of the electric current to electromagnetic potential transformer and electromagnetic potential transformer fuse, effectively prevent electromagnetic potential mutual inductance
Device burns, electromagnetic potential transformer fuse blows；Harmonic elimination apparatus are in parallel with electromagnetic potential transformer, i.e., can be right in time
Isolated neutral system capacitive earth current is released, and makes isolated neutral system avoid increasing current detecting and control
Circuit, enhances stability, the safety and reliability of isolated neutral system operation.
Those skilled in the art will readily occur to this practicality after considering specification and putting into practice the disclosure of utility model here
Other new embodiments.The application is intended to any modification of the present utility model, purposes or adaptations, these
Modification, purposes or adaptations follow general principle of the present utility model and including undocumented skill of the utility model
Common knowledge or conventional techniques in art field.Description and embodiments be considered only as it is exemplary, it is of the present utility model
True scope and spirit are pointed out by following claim.
It should be appreciated that the utility model is not limited to the accurate knot for being described above and being shown in the drawings
Structure, and can without departing from the scope carry out various modifications and changes.Scope of the present utility model only will by appended right
Ask to limit.
Claims (6)
1. a kind of harmonic elimination apparatus, it is characterised in that including three-phase five-limb reactor and damping resistance (3), wherein：
The three-phase five-limb reactor includes reactor primary winding and reactor secondary windings, the reactor primary winding
Including the first reactor primary winding (11), the second reactor primary winding (12) and the 3rd reactor primary winding (13), institute
State one end of the first reactor primary winding (11), the second reactor primary winding (12) and the 3rd reactor primary winding (13)
Earth, the first reactor primary winding (11), the second reactor primary winding (12) and the 3rd reactor primary around
The other end of group (13) is used to connect three phase mains；
The reactor secondary windings includes the first reactor secondary windings (21), the second reactor secondary windings (22) and the 3rd
Reactor secondary windings (23), the first reactor secondary windings (21), the second reactor secondary windings (22) and the 3rd electricity
Anti- device secondary windings (23) is sequentially connected in series into open delta, one end ground connection of the open delta, the other end and the damping electricity
Hinder one end connection of (3), the other end ground connection of the damping resistance (3).
2. harmonic elimination apparatus according to claim 1, it is characterised in that the return yoke of the three-phase five-limb reactor is provided with gas
Gap (4), air gap (4) size is 5~15mm.
3. a kind of harmonic elimination system, it is characterised in that appoint including electromagnetic potential transformer, three phase mains and claim 1-2
Harmonic elimination apparatus described in one, wherein：
At the beginning of first reactor primary winding (11) of the harmonic elimination apparatus, the second reactor primary winding (12) and the 3rd reactor
The other end of level winding (13) is connected with the A phases power supply in the three phase mains, B phases power supply and C phase power supplys respectively；
The electromagnetic potential transformer includes transformer primary winding and transformer secondary winding, the transformer primary winding
Including the first transformer primary winding (51), the second transformer primary winding (52) and the 3rd transformer primary winding (53), institute
State one end of the first transformer primary winding (51), the second transformer primary winding (52) and the 3rd transformer primary winding (53)
Earth, the first transformer primary winding (51), the second transformer primary winding (52) and the 3rd transformer primary around
The other end of group (53) is connected with the A phases power supply, B phases power supply and C phase power supplys respectively.
4. harmonic elimination system according to claim 3, it is characterised in that the reactance value of the three-phase five-limb reactor is less than
Or equal to 1/10th of the electromagnetic potential transformer reactance value.
5. harmonic elimination system according to claim 3, it is characterised in that when the harmonic elimination system is used for 10kV system harmonic eliminations
When, the resistance of the harmonic elimination apparatus is 1k Ω~10k Ω, induction reactance is 3k Ω~6k Ω.
6. harmonic elimination system according to claim 3, it is characterised in that when the harmonic elimination system is used for 35kV system harmonic eliminations
When, the resistance of the harmonic elimination apparatus is 5k Ω~30k Ω, induction reactance is 11k Ω~22k Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621252928.XU CN206195343U (en) | 2016-11-18 | 2016-11-18 | Harmonic elimination device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621252928.XU CN206195343U (en) | 2016-11-18 | 2016-11-18 | Harmonic elimination device and system |
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| Publication Number | Publication Date |
|---|---|
| CN206195343U true CN206195343U (en) | 2017-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621252928.XU Withdrawn - After Issue CN206195343U (en) | 2016-11-18 | 2016-11-18 | Harmonic elimination device and system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106532675A (en) * | 2016-11-18 | 2017-03-22 | 云南电网有限责任公司电力科学研究院 | Resonance elimination apparatus and resonance elimination system |
| CN108767815A (en) * | 2018-07-17 | 2018-11-06 | 云南电网有限责任公司红河供电局 | Electromagnetic potential transformer auto by pass harmonic elimination apparatus |
-
2016
- 2016-11-18 CN CN201621252928.XU patent/CN206195343U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106532675A (en) * | 2016-11-18 | 2017-03-22 | 云南电网有限责任公司电力科学研究院 | Resonance elimination apparatus and resonance elimination system |
| CN106532675B (en) * | 2016-11-18 | 2018-07-20 | 云南电网有限责任公司电力科学研究院 | A kind of harmonic elimination apparatus and harmonic elimination system |
| CN108767815A (en) * | 2018-07-17 | 2018-11-06 | 云南电网有限责任公司红河供电局 | Electromagnetic potential transformer auto by pass harmonic elimination apparatus |
| 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 |
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| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170524 Effective date of abandoning: 20180720 |
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| AV01 | Patent right actively abandoned |