CN108963997A - TXDH type PT direct current decouples harmonic elimination module - Google Patents
TXDH type PT direct current decouples harmonic elimination module Download PDFInfo
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- CN108963997A CN108963997A CN201811003365.4A CN201811003365A CN108963997A CN 108963997 A CN108963997 A CN 108963997A CN 201811003365 A CN201811003365 A CN 201811003365A CN 108963997 A CN108963997 A CN 108963997A
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- quick resistance
- harmonic elimination
- direct current
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- 230000008030 elimination Effects 0.000 title claims abstract description 47
- 238000003379 elimination reaction Methods 0.000 title claims abstract description 47
- 238000009413 insulation Methods 0.000 claims abstract description 33
- 238000004804 winding Methods 0.000 claims abstract description 27
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000003990 capacitor Substances 0.000 claims abstract description 20
- 238000005259 measurement Methods 0.000 claims abstract description 12
- 230000007935 neutral effect Effects 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims 1
- 229910045601 alloy Inorganic materials 0.000 claims 1
- 239000004411 aluminium Substances 0.000 claims 1
- 229910052782 aluminium Inorganic materials 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 1
- 230000005350 ferromagnetic resonance Effects 0.000 abstract description 8
- 230000005284 excitation Effects 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000000977 initiatory effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000005291 magnetic effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
-
- 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
- H02H9/005—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection avoiding undesired transient conditions
- H02H9/007—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection avoiding undesired transient conditions avoiding or damping oscillations, e.g. fenoresonance or travelling waves
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a kind of TXDH type PT direct currents to decouple harmonic elimination module, including leading core, the quick resistance of stream, bracket, tinfoil paper capacitor, it leads to be fixedly installed with outside core and leads core insulation set, it leads setting on the downside of core and flows quick resistance, it leads core and is connect with the quick resistance of stream by insulated cable electric signal, it flows and tinfoil paper capacitor is set on the right side of quick resistance, under alternating-current system normal running (operation) conditions, TXDH type PT direct current decouples harmonic elimination module and DC impedance high resistant is presented, greater than 2000 megaohms, ensure that the direct current measurement signal in alternating-current system is accurate；Low-resistance is presented in AC impedance, 40-50 kilo-ohms, the measurement accuracy of voltage transformer is not influenced, when PT ferromagnetic resonance occurs, TXDH type PT direct current decouples harmonic elimination module and realizes quick harmonic elimination because AC impedance high resistant is quickly presented, and resonance overvoltage amplitude is bigger, and the harmonic elimination time is shorter, the excitation current of limitation voltage transformer first winding is uprushed, and prevents from damaging due to voltage transformer once winding current is uprushed.
Description
Technical field
The present invention relates to PT direct current decoupling harmonic elimination technical fields more particularly to a kind of TXDH type PT direct current to decouple harmonic elimination mould
Block.
Background technique
Electromagnetic potential transformer is referred to as PT, is that a kind of high voltage in power grid is converted into low pressure, convenient for monitoring and
The high-tension apparatus of measurement, due to PT low pressure lateral load very little, close to light condition, seen over the ground from high-pressure side into equivalent excitation
Induction reactance is very big, and when bus-tie circuit breaker closing operation or system loading acute variation occur in route, generated transient state was impacted
Journey can excite ferromagnetic resonance circuit between electromagnetic potential transformer and three-phase conducting wire direct-to-ground capacitance, cause PT to be saturated, cause
PT fuse blows, PT scaling loss, busbar short-circuit threaten system and the safety of staff.It is quick resistive using capacitive circuit and stream
Circuit in series circuit realizes that direct current signal detection is accurate in AC system, while when ferromagnetic resonance for electromagnetic voltage transformer generation
Destroy condition of resonance.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, of the invention
One purpose is to propose that direct current is presented in a kind of TXDH type PT direct current decoupling harmonic elimination module, TXDH type PT direct current decoupling harmonic elimination module
Impedance high resistant is greater than 2000 megaohms, ensures that the direct current measurement signal in alternating-current system is accurate；Low-resistance is presented in AC impedance,
Less than 40 kilo-ohms, the measurement accuracy of voltage transformer is not influenced, and when PT ferromagnetic resonance occurs, TXDH type PT direct current decouples harmonic elimination mould
Block realizes quick harmonic elimination because AC impedance high resistant is quickly presented, and the harmonic elimination time of first-harmonic resonance is about 1.56s, Subharmonic Resonance
The harmonic elimination time is 2.1s, and under 3.5 times of overvoltage, PT excitation current can be limited in 200mA by PT direct current decoupling harmonic elimination module
Below.
TXDH type PT direct current according to an embodiment of the present invention decouples harmonic elimination module, including leads core, the quick resistance of stream, bracket, tin
Sheet capacitance, wherein it is described lead to be fixedly installed with outside core lead core insulation set, it is described to lead the quick resistance of stream of setting on the downside of core, institute
It states and is fixedly installed with the quick resistance insulation set of stream on the outside of the quick resistance of stream, it is embedding between the quick resistance of stream and the quick resistance insulation set of the stream
Set is equipped with insulating resin casing, described to lead core and connect with the quick resistance of stream by insulated cable electric signal, described to flow quick electricity
The tinfoil paper capacitor is arranged in resistance right side, and the tinfoil paper capacitor is connect with the quick resistance of stream by insulated cable electric signal, described
It is fixedly installed with capacitive insulation sheath on the outside of tinfoil paper capacitor, nested installation between the tinfoil paper capacitor and the capacitive insulation sheath
There is aluminum alloy sheath, the quick resistance insulation set of stream is fixedly mounted on the frame upper with the capacitive insulation sheath.
Preferably, the core top of leading is provided with circuit connecting unit, and the circuit connecting unit accesses voltage transformer circuit
In, the voltage transformer circuit includes power grid three-phase bus, three-phase first winding, three-phase secondary winding, open-triangular winding.
Preferably, it is described lead core and connector and flow quick resistance be composed in series for limiting the surge of PT primary current first
Circuit, the tinfoil paper capacitor loop ensure that direct current signal is accurate with first circuit DC impedance in series for improving module
The second circuit of measurement, circuit connecting unit access central point U of three-phase first winding by conducting wireNPlace, the tinfoil paper capacitor
Ground terminal passes through the backbone metal chassis ground.
Preferably, the stream quick resistance insulation set top is fixedly installed with the first full skirt, capacitive insulation sheath top
It is fixedly installed with the second full skirt.
In the present invention, under normal running (operation) conditions, TXDH type PT direct current decouples harmonic elimination module and low-resistance is presented, and it is mutual not change voltage
The operating condition of sensor will not have an impact the measurement accuracy of mutual inductor, when PT ferromagnetic resonance occurs, TXDH type PT DC solutions
Coupling harmonic elimination module realizes quick harmonic elimination because high resistant quickly is presented, and resonance overvoltage amplitude is bigger, and the harmonic elimination time is shorter, limitation electricity
The excitation current of pressure mutual inductor first winding is uprushed, and prevents from increasing because of voltage transformer once winding current, after fuse blows
Because energy deficiency is unable to the busbar short-circuit accident of arc extinguishing initiation.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram that TXDH type PT direct current proposed by the present invention decouples harmonic elimination module；
Fig. 2 is that TXDH type PT direct current proposed by the present invention decouples harmonic elimination modular circuit catenation principle figure；
Fig. 3 is that TXDH type PT direct current proposed by the present invention decouples harmonic elimination modular circuit connection equivalent circuit diagram；
Fig. 4 is PT neutral point proposed by the present invention through TXDH direct current decoupling lab diagram of harmonic elimination module ground；
Fig. 5 is PT neutral point proposed by the present invention through the TXDH direct current decoupling secondary lab diagram of harmonic elimination module ground；
Fig. 6 decouples harmonic elimination module ground lab diagram three times through TXDH direct current for PT neutral point proposed by the present invention.
In figure: 1- leads core, 2- leads core insulation set, the first full skirt of 3-, 4- flow quick resistance insulation set, 5- insulating resin casing,
6- flows quick resistance, 7- bracket, the second full skirt of 8-, 9- capacitive insulation sheath, 10- aluminum alloy sheath, 11- tinfoil paper capacitor, 12- insulation
Cable, 13- power grid three-phase bus, 14-TXDH type PT direct current decoupling harmonic elimination module, 15- three-phase first winding, 16- three-phase are secondary
Winding, 17- open-triangular winding, 18- circuit connecting unit.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
Examples of the embodiments are shown in the accompanying drawings, and in which the same or similar labels are throughly indicated identical or classes
As element or element with the same or similar functions.The embodiments described below with reference to the accompanying drawings are exemplary, purport
It is being used to explain the present invention, and is being not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
Referring to Fig.1, TXDH type PT direct current decouples harmonic elimination module, including leads core 1, the quick resistance 6 of stream, bracket 7, tinfoil paper capacitor
11, wherein lead to be fixedly installed with outside core 1 and lead core insulation set 2, lead setting on the downside of core 1 and flow quick resistance 6, flow solid on the outside of quick resistance 6
It flows equipped with quick resistance insulation set 4 is flowed and nested between quick resistance 6 and the quick resistance insulation set 4 of stream insulating resin casing is installed in Dingan County
5, it leads core 1 and is connect with the quick resistance 6 of stream by 12 electric signal of insulated cable, flow setting tinfoil paper capacitor 11 on the right side of quick resistance 6, tinfoil paper electricity
Hold 11 to connect with the quick resistance of stream by 12 electric signal of insulated cable, capacitive insulation sheath 9 be fixedly installed on the outside of tinfoil paper capacitor 11,
It is nested between tinfoil paper capacitor 11 and capacitive insulation sheath 9 that aluminum alloy sheath 10 is installed, flow quick resistance insulation set 4 and capacitive insulation
Sheath 9 is fixedly mounted on 7 top of bracket, flows 4 tops of quick resistance insulation set and is fixedly installed with the first full skirt 3, capacitive insulation sheath 9
Top is fixedly installed with the second full skirt 8.
Referring to Fig. 2, to lead 1 top of core and be provided with circuit connecting unit 18, circuit connecting unit 18 accesses in voltage transformer circuit,
Voltage transformer circuit includes power grid three-phase bus 13, three-phase first winding 15, three-phase secondary winding 16, open-triangular winding
17；Coil LA, coil LB, coil LC are provided in three-phase first winding 15, coil LA, coil LB, coil LC pass through conducting wire point
Jie Ru not be in power grid three-phase bus 13, circuit connecting unit 18 passes through conducting wire and accesses 15 central point U of three-phase first windingNPlace,
It leads core 1 and connector 18 and flows quick resistance 6 and be composed in series the first circuit to increase sharply for limiting PT primary current, tinfoil paper capacitor 11
Circuit and the first circuit DC impedance in series for improving module ensure that the second circuit of direct current signal precise measurement, circuit connect
Fitting 18 accesses 15 central point U of three-phase first winding by conducting wireNPlace, 11 ground terminal of tinfoil paper capacitor pass through the bracket 7
Metab ground connection.
It is the equivalent circuit diagram that TXDH type PT direct current decouples that harmonic elimination module accesses voltage transformer circuit referring to Fig. 3, Fig. 3,
Voltage transformer capacity is 15VA, and specified secondary impedance is 667 Ω, and an impedance is 6.67 megaohms, and the decoupling of TXDH10 direct current disappears
Humorous module equivalent impedance is 40 kilo-ohms, and phase voltage vector ratio column are only 1 percent (40/667000), is influenced on voltage measurement inclined
Difference is only that low-resistance is presented in 1 percent, TXDH type PT direct current decoupling harmonic elimination module, does not change the operating condition of voltage transformer, right
The measurement accuracy of mutual inductor will not have an impact；For being applied in 6kV intermediate distribution system, when single-phase earthing is run,
TXDH direct current decoupling harmonic elimination module and coil LC are in parallel ground connection (ignoring 6.67 megaohms of coil LC impedance)；
Coil LA electric current IA=U/R1=6/ (40+6670)=0.89mA；
Wherein U is voltage 6kV, R1Harmonic elimination module equivalent impedance is decoupled with TXDH10 direct current for 6.67 megaohms of LA coil impedance
The sum of 40 kilo-ohms.
Coil LB phase current IB=U/R2=6/ (40+6670)=0.89mA；
Wherein U is voltage 6kV, R2Harmonic elimination module equivalent impedance is decoupled with TXDH10 direct current for 6.67 megaohms of LB coil impedance
The sum of 40 kilo-ohms.
TXDH direct current decouples harmonic elimination module line current=0.89*1.732=1.55mA；
System ferro-resonance over-voltage, coil LA, coil LB impedance is zero, and coil saturation state dash current is I=U/
R3=6/40=150mA is less than 200mA；The excitation current of limitation voltage transformer first winding is uprushed, and is prevented because of mutual induction of voltage
Device once winding current increases, because energy deficiency is unable to the busbar short-circuit accident of arc extinguishing initiation after fuse blows.
Wherein U is voltage 6kV, R340 kilo-ohms of harmonic elimination module equivalent impedance is decoupled for TXDH10 direct current；
15 neutral point of PT three-phase first winding concatenates the mode of TXDH10 direct current decoupling harmonic elimination module 14, and ferromagnetic resonance occurs
Neutral resistor increases quickly afterwards, when being equivalent to normal operation PT neutral point through 40k Ω resistance eutral grounding, occur after ferromagnetic resonance
Neutral point puts into the very big resistance of resistance value immediately, the resistance that investment resistance value is 4000k Ω when t=0.1s being arranged in a model,
The waveform for obtaining each characteristic quantity is as Figure 4-Figure 6, and system busbar three-phase voltage is close normal after 50ms, open delta voltage and stream
The three-phase current for crossing PT gradually tends to normal operation, that is, illustrates that the thermistor resonance eliminator of neutral point concatenation is ferromagnetic to PT humorous
Vibration has good inhibitory effect, and the harmonic elimination time is short, can effectively prevent PT primary side fuse blows, while preventing PT iron
Magnetic resonance interferes the differentiation of singlephase earth fault.
One PT neutral point of table decouples harmonic elimination module ground experimental data table through TXDH direct current
As shown in Table 1, in conjunction with Fig. 4-6, actual value peak point current Ia=34mA in experiment for the first time；Ib=138mA；Ic
=131mA；In=143.956mA；Actual value peak point current Ia=41mA in second of experiment；Ib=110mA；Ic=151mA；
In=130.206mA；Actual value peak point current Ia=41mA in third time experiment；Ib=172mA；Ic=152mA；In=
171.247mA；Limit PT it is each mutually and neutral point over the ground resonance current In less than 200 milliamperes, limitation voltage transformer once around
The excitation current of group is uprushed, and prevents from damaging due to voltage transformer once winding current is uprushed.
In conclusion the TXDH type PT direct current decouples harmonic elimination module, under normal running (operation) conditions, the decoupling of TXDH type PT direct current disappears
Low-resistance is presented in humorous module, does not change the operating condition of voltage transformer, will not have an impact to the measurement accuracy of mutual inductor, occurs
When PT ferromagnetic resonance, TXDH type PT direct current decoupling harmonic elimination module realizes quick harmonic elimination, resonance overvoltage because high resistant quickly is presented
Amplitude is bigger, and the harmonic elimination time is shorter, and the excitation current of limitation voltage transformer first winding is uprushed, and prevents because of voltage transformer one
Secondary winding current increases, because energy deficiency is unable to the busbar short-circuit accident of arc extinguishing initiation after fuse blows.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiment or examples in can be combined in any suitable manner.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (4)
1. a kind of TXDH type PT direct current decouples harmonic elimination module, it is characterised in that: including leading core, the quick resistance of stream, bracket, tinfoil paper electricity
Hold, wherein it is described lead to be fixedly installed with outside core lead core insulation set, it is described to lead the quick resistance of stream of setting on the downside of core, the stream
The quick resistance insulation set of stream, nested peace between the quick resistance of stream and the quick resistance insulation set of the stream are fixedly installed on the outside of quick resistance
It is described to lead core and connect with the quick resistance of the stream by insulated cable electric signal equipped with insulating resin casing, the quick resistance right side of stream
The tinfoil paper capacitor is arranged in side, and the tinfoil paper capacitor is connect with the quick resistance of stream by insulated cable electric signal, the tinfoil paper
It is fixedly installed with capacitive insulation sheath on the outside of capacitor, it is nested between the tinfoil paper capacitor and the capacitive insulation sheath that aluminium is installed
Alloy sleeve, the quick resistance insulation set of stream are fixedly mounted on the frame upper with the capacitive insulation sheath.
2. TXDH type PT direct current according to claim 1 decouples harmonic elimination module, it is characterised in that: described to lead the setting of core top
There is circuit connecting unit, the circuit connecting unit accesses in voltage transformer primary coil circuit of neutral point, the voltage transformer
Circuit includes power grid three-phase bus, three-phase first winding, three-phase secondary winding, open-triangular winding.
3. TXDH type PT direct current according to claim 2 decouples harmonic elimination module, it is characterised in that: described to lead core and connector
The first circuit to increase sharply for limiting PT primary current, the tinfoil paper capacitor loop and described first are composed in series with quick resistance is flowed
The circuit DC impedance in series for improving module ensures the second circuit of direct current signal precise measurement, and circuit connecting unit is by leading
Line accesses at central point UN of three-phase first winding, and tinfoil paper capacity earth end passes through the backbone metal chassis ground.
4. TXDH type PT direct current according to claim 1 decouples harmonic elimination module, it is characterised in that: the quick resistance insulation of stream
Set top is fixedly installed with the first full skirt, increases creepage distance of insulation, capacitive insulation sheath top is fixedly installed with second
Full skirt.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811003365.4A CN108963997A (en) | 2018-08-30 | 2018-08-30 | TXDH type PT direct current decouples harmonic elimination module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811003365.4A CN108963997A (en) | 2018-08-30 | 2018-08-30 | TXDH type PT direct current decouples harmonic elimination module |
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| Publication Number | Publication Date |
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| CN108963997A true CN108963997A (en) | 2018-12-07 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201118225Y (en) * | 2007-11-16 | 2008-09-17 | 宁夏电力科技教育工程院 | Primary current limiting resonance eliminating device |
| CN201845648U (en) * | 2010-09-02 | 2011-05-25 | 安徽徽电科技股份有限公司 | Primary resonance eliminator |
| CN201985517U (en) * | 2011-04-14 | 2011-09-21 | 安徽凯民电力技术有限公司 | Current-limiting resonance eliminator |
| CN202363899U (en) * | 2011-12-15 | 2012-08-01 | 安徽泰瑞通达机电设备有限公司 | Primary harmonic eliminator |
| CN103824684A (en) * | 2014-02-12 | 2014-05-28 | 合肥多安自动化技术有限公司 | Comprehensive once current-limiting and voltage-limiting resonance eliminator |
| CN205141654U (en) * | 2015-11-30 | 2016-04-06 | 云南电网有限责任公司电力科学研究院 | Resonance elimilator |
| CN206442109U (en) * | 2017-02-24 | 2017-08-25 | 胡金海 | A kind of voltage transformer for electric power distribution network antiresonance device |
-
2018
- 2018-08-30 CN CN201811003365.4A patent/CN108963997A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201118225Y (en) * | 2007-11-16 | 2008-09-17 | 宁夏电力科技教育工程院 | Primary current limiting resonance eliminating device |
| CN201845648U (en) * | 2010-09-02 | 2011-05-25 | 安徽徽电科技股份有限公司 | Primary resonance eliminator |
| CN201985517U (en) * | 2011-04-14 | 2011-09-21 | 安徽凯民电力技术有限公司 | Current-limiting resonance eliminator |
| CN202363899U (en) * | 2011-12-15 | 2012-08-01 | 安徽泰瑞通达机电设备有限公司 | Primary harmonic eliminator |
| CN103824684A (en) * | 2014-02-12 | 2014-05-28 | 合肥多安自动化技术有限公司 | Comprehensive once current-limiting and voltage-limiting resonance eliminator |
| CN205141654U (en) * | 2015-11-30 | 2016-04-06 | 云南电网有限责任公司电力科学研究院 | Resonance elimilator |
| CN206442109U (en) * | 2017-02-24 | 2017-08-25 | 胡金海 | A kind of voltage transformer for electric power distribution network antiresonance device |
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Inventor after: Wang Wanzhang Inventor after: Zhang Shusheng Inventor before: Wang Wanzhang Inventor before: Zhang Shusheng |
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| CB03 | Change of inventor or designer information |