CN106532675A - Resonance elimination apparatus and resonance elimination system - Google Patents
Resonance elimination apparatus and resonance elimination system Download PDFInfo
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- CN106532675A CN106532675A CN201611031581.0A CN201611031581A CN106532675A CN 106532675 A CN106532675 A CN 106532675A CN 201611031581 A CN201611031581 A CN 201611031581A CN 106532675 A CN106532675 A CN 106532675A
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- reactor
- primary winding
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- harmonic elimination
- transformer
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/08—Limitation or suppression of earth fault currents, e.g. Petersen coil
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- Emergency Protection Circuit Devices (AREA)
Abstract
The invention relates to a resonance elimination apparatus and a resonance elimination system. The resonance elimination apparatus comprises a three-phase five-column type reactor and a damping resistor, wherein the three-phase five-column type reactor comprises reactor primary windings and reactor secondary windings, one end of each reactor primary winding is grounded in parallel, the other end is used for connection with a three-phase power source, the reactor secondary windings are connected in series to form an opening triangle, one end of the opening triangle is grounded, the other end is connected with one end of the damping resistor, and the other end of the damping resistor is grounded. The resonance elimination system comprises an electromagnetic voltage transformer, a three-phase power source and the resonance elimination apparatus. According to the resonance elimination apparatus and the resonance elimination system provided by the embodiments of the invention, when a single-phase grounding fault takes place in a power system, a low-impedance discharge channel of grounding capacitive currents is provided, burning damage of an electromagnetic voltage transformer and fusion of an electromagnetic voltage transformer fuse are effectively prevented, and the operation stability, safety and reliability of the power system are enhanced.
Description
Technical field
The present invention relates to technical field of power systems, more particularly to a kind of harmonic elimination apparatus and harmonic elimination system.
Background technology
When there is the electric current in singlephase earth fault or power system in power system have 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.Referred to when power system is in normal operating conditions, in advance using preset arc suppression coil harmonic elimination
Arc suppression coil is adjusted to into correct position first, 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, make preset arc suppression coil produce inductive current over the ground, so as to mend 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 small 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.
The content of the invention
To overcome problem present in correlation technique, the present invention to provide a kind of harmonic elimination apparatus and harmonic elimination system.
A kind of first aspect according to embodiments of the present invention, there is provided harmonic elimination apparatus, including three-phase five-limb reactor and resistance
Buffer 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, and described first is electric
One end earth of anti-device armature winding, the second reactor primary winding and the 3rd reactor primary winding, described first is electric
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.
Second aspect according to embodiments of the present invention, there is provided a kind of harmonic elimination system, including electromagnetic potential transformer, three-phase
Harmonic elimination apparatus in power supply 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 phase power supplys 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 the connection of C phases power supply.
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 embodiments of the invention are provided can include following beneficial effect：
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 become 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 present invention can be limited.
Description of the drawings
During accompanying drawing herein is merged in specification and the part of this specification is constituted, show the enforcement for meeting the present invention
Example, and be used for explaining the principle of the present invention together with specification.
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, without having to pay creative labor, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is a kind of structural representation of harmonic elimination apparatus provided in an embodiment of the present invention；
Fig. 2 is the structural representation of reactor primary winding in a kind of three-phase five-limb reactor provided in an embodiment of the present invention
Figure；
Fig. 3 is a kind of structural representation of harmonic elimination system provided in an embodiment of the present invention；
Fig. 4 is that a kind of equivalent circuit of harmonic elimination system access isolated neutral system provided in an embodiment of the present invention is illustrated
Figure；
In Fig. 1-4, symbol is expressed as：
11- the first reactor primary windings, 12- the second reactor primary windings, the 3rd reactor primary windings of 13-, 21-
First reactor secondary windings, 22- the second reactor secondary windings, the 3rd reactor secondary windings of 23-, 3- damping resistances, 4-
Air gap, 51- the first transformer primary windings, 52- the second transformer primary windings, the 3rd transformer primary windings of 53-.
Specific embodiment
Here in detail exemplary embodiment will be illustrated, its example is illustrated in the accompanying drawings.Explained below 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 embodiment do not represent and the consistent all embodiments of the present invention.Conversely, they be only with as appended by
The example of consistent apparatus and method in terms of some described in detail in claims, the present invention.
The harmonic elimination apparatus that this enforcement is provided, are applied to isolated neutral system of the capacitance current less than 10A, for neutrality
Point isolated neutral system, due to realizing eliminating ferromagnetic humorous by way of property point in systems connects harmonic elimination apparatus ground connection
Shake, the safe operation of system is seriously threatened.
Referring to Fig. 1, it is a kind of structural representation of the harmonic elimination apparatus according to an exemplary embodiment, 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 are same
Name end is used to connect three phase mains.In the present embodiment, three phase mains is the A phase power supplys 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 Same Name of Ends ground connection, another Same Name of Ends and a 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, it is the structural representation of reactor primary winding in a kind of three-phase five-limb reactor provided in an embodiment of the present invention.
As shown in Fig. 2 reactor primary winding is also gripped including 2 sides, side is gripped and is provided with air gap 4.Grip on the side of three-phase five-limb reactor
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 suitable
In zero-sequence reactor, so that after isolated neutral system occurs singlephase earth fault, the three of three-phase five-limb reactor
Phase reactor primary winding can pass through 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, is made by the zero-sequence current of three-phase five-limb reactor more than 1A, so as to play a part of leakage current,
And the zero-sequence current for making to pass through is 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 number of air gap 4 can make appropriate adjustment according to the length that side is gripped, and all should belong to this
Bright 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, it is a kind of knot of harmonic elimination system provided in an embodiment of the present invention
Structure schematic diagram.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 phase power supplys 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 of transformer primary winding 51, the second transformer primary winding 52 and the 3rd transformer primary winding 53 is distinguished
It is connected with A phase power supplys, B phases power supply and C phase power supplys.
Further, the reactance value of three-phase five-limb reactor less than or equal to electromagnetic potential transformer reactance value ten
/ 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, it is 11k Ω that the resistance of harmonic elimination apparatus is 5k Ω～30k Ω, induction reactance
～22k Ω.
Referring to Fig. 4, it is a kind of equivalent electric of harmonic elimination system access isolated neutral system provided in an embodiment of the present invention
Road schematic diagram.As shown in figure 4, ground connection transition resistances of the Rd for isolated neutral system, K is equivalent earthed switch, and Ua is to connect
Ground phase voltage, i.e. A phase voltages, Rz are equivalent damping resistance 3, and Lwb is three-phase five-limb reactor, and FU is that electromagnetic potential is mutual
Sensor fuse, inductance of the Lpt for electromagnetic potential transformer, an equivalent inductance of the Lpt/3 for electromagnetic potential transformer,
Equivalent zero sequence electric capacity of the 3C0 for isolated neutral system, equivalent resistance to earth of the R0 for isolated neutral system, R0/3 is
The one equivalent resistance to earth of R0, U00 are three-phase imbalance voltage.In the embodiment of the present invention, open in three-phase five-limb reactor
The rated voltage of mouth triangle takes 500V, 3 value of damping resistance, 40 Ω, and the current in resistance property that harmonic elimination apparatus are provided is about 1A, perception electricity
Stream 1A～2A, corresponding harmonic elimination apparatus total impedance Rz are about 6k Ω, and total reactance XLwb is about 3k Ω～6k Ω.And electromagnetic potential
Substantially in more than 1M Ω, the inductance Lpt/3 of electromagnetic potential transformer is about 300k Ω for the impedance of transformer.As can be seen here,
The harmonic elimination system that the present invention is provided is released there is provided impedance path for direct-to-ground capacitance, so as to avoid leakage current to electromagnetic type
The impact of voltage transformer and electromagnetic potential transformer fuse.
As seen from the above-described embodiment, this enforcement is provided harmonic elimination apparatus and harmonic elimination system, are applied to capacitance current less than 10A
Isolated neutral system.When isolated neutral system carries out harmonic elimination, by harmonic elimination apparatus and electromagnetic potential transformer
Parallel connection, makes harmonic elimination apparatus become the Low ESR leakage path of isolated neutral system capacitive earth current, right so as to avoid
Ground impact of the capacitance current to electromagnetic potential transformer and electromagnetic potential transformer fuse, effectively prevent electromagnetic type electricity
Pressure transformer burns, electromagnetic potential transformer fuse blows；Harmonic elimination apparatus are in parallel with electromagnetic potential transformer, i.e., can
Centering point isolated neutral system capacitive earth current is released in time, makes isolated neutral system avoid increasing current detecting
And control circuit, enhance stability, the safety and reliability of isolated neutral system operation.
Those skilled in the art will readily occur to its of the present invention after considering specification and putting into practice disclosure of the invention here
Its embodiment.The application is intended to any modification of the present invention, purposes or adaptations, these modifications, purposes or
Person's adaptations follow the general principle of the present invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.Description and embodiments are considered only as exemplary, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be appreciated that the precision architecture for being described above and being shown in the drawings is the invention is not limited in, and
And various modifications and changes can be being carried out without departing from the scope.The scope of the present invention is limited only by appended claim.
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 are electric
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
One end connection of resistance (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 are 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 phase power supplys 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, it is 3k Ω～6k Ω that the resistance of the harmonic elimination apparatus is 1k Ω～10k Ω, induction reactance.
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, it is 11k Ω～22k Ω that the resistance of the harmonic elimination apparatus is 5k Ω～30k Ω, induction reactance.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611031581.0A CN106532675B (en) | 2016-11-18 | 2016-11-18 | A kind of harmonic elimination apparatus and harmonic elimination system |
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| CN201611031581.0A CN106532675B (en) | 2016-11-18 | 2016-11-18 | A kind of harmonic elimination apparatus and harmonic elimination system |
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| CN106532675B CN106532675B (en) | 2018-07-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107171302A (en) * | 2017-07-10 | 2017-09-15 | 合肥东玖电气有限公司 | A kind of new microcomputer harmonic 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 |
| CN113410035A (en) * | 2021-06-25 | 2021-09-17 | 河北旭辉电气股份有限公司 | Anti-resonance voltage transformer with grounding compensation function based on Y-shaped wiring |
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| CN201146385Y (en) * | 2008-01-21 | 2008-11-05 | 孙嘉宁 | Apparatus for discrimination and protection of eliminating single phase ground fault of neutral point non-useful earthing electric network |
| CN103310953A (en) * | 2013-05-21 | 2013-09-18 | 江苏宏安变压器有限公司 | Three-phase five-column arc extinction electric reactor |
| US20150146336A1 (en) * | 2013-11-26 | 2015-05-28 | Thomson Licensing | Surge protector for a transmission line connector |
| CN206195343U (en) * | 2016-11-18 | 2017-05-24 | 云南电网有限责任公司电力科学研究院 | Harmonic elimination device and system |
-
2016
- 2016-11-18 CN CN201611031581.0A patent/CN106532675B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201146385Y (en) * | 2008-01-21 | 2008-11-05 | 孙嘉宁 | Apparatus for discrimination and protection of eliminating single phase ground fault of neutral point non-useful earthing electric network |
| CN103310953A (en) * | 2013-05-21 | 2013-09-18 | 江苏宏安变压器有限公司 | Three-phase five-column arc extinction electric reactor |
| US20150146336A1 (en) * | 2013-11-26 | 2015-05-28 | Thomson Licensing | Surge protector for a transmission line connector |
| CN206195343U (en) * | 2016-11-18 | 2017-05-24 | 云南电网有限责任公司电力科学研究院 | Harmonic elimination device and system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107171302A (en) * | 2017-07-10 | 2017-09-15 | 合肥东玖电气有限公司 | A kind of new microcomputer harmonic 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 |
| CN113410035A (en) * | 2021-06-25 | 2021-09-17 | 河北旭辉电气股份有限公司 | Anti-resonance voltage transformer with grounding compensation function based on Y-shaped wiring |
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| Publication number | Publication date |
|---|---|
| CN106532675B (en) | 2018-07-20 |
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