CN105629017A - High-voltage direct-current voltage divider standardized assembly - Google Patents
High-voltage direct-current voltage divider standardized assembly Download PDFInfo
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- CN105629017A CN105629017A CN201410609899.7A CN201410609899A CN105629017A CN 105629017 A CN105629017 A CN 105629017A CN 201410609899 A CN201410609899 A CN 201410609899A CN 105629017 A CN105629017 A CN 105629017A
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Abstract
The invention relates to a high-voltage direct-current voltage divider standardized assembly. The high-voltage direct-current voltage divider standardized assembly comprises a pair of insulating support skeletons which are coaxially sleeved, metal shielding cylinders are embedded in cylinder walls of the insulating support skeletons, a standard-cell voltage dividing resistor string is installed in cylinder bodies of the two insulating support skeletons, voltage dividing resistor connecting points are respectively arranged on two ends of the voltage dividing resistor string, the voltage dividing resistor string is externally sleeved by an internal voltage sharing/heat dissipation ring, a standard-cell voltage sharing resistor string is installed outside the cylinder bodies of the two insulating support skeletons, voltage sharing resistor connecting points are respectively arranged on two ends of the voltage sharing resistor string, and an external voltage sharing/heat dissipation ring is installed at the external side of the voltage sharing resistor string. According to the invention, the technical advantages, such as small signal sensing and local collection, of an electronic voltage transformer are fully developed, miniaturization and lower power of a direct-current voltage divider is realized, the direct-current voltage divider is simplified into a standard direct-current voltage dividing assembly which can be assembled in a building block form, and direct-current voltage dividers different in voltage level can be formed by means of simple serial assembling in the assembling process.
Description
Technical field
The invention belongs to the manufacturing technology field of High-Voltage Electrical Appliances, relate to inside a kind of high pressure, extra-high voltage direct-current voltage transformer all pressure, dividing potential drop, shielding, heat-radiating integrated standard package technology.
Background technology
Existing DC voltage transformer is commonly used a kind of resistance or resistive-capacitive voltage divider technology, when extra-high voltage, it is necessary to the technical barrier such as simultaneously solve electric field equilibrium, electromagnetic shielding, thermal power are dispersed. although existing many technical literatures discuss the counter-measure of an above difficult problem both at home and abroad at present, but the thermal power that still suffers from its actual application product designs the defects such as thermal buildup issue is serious of operation excessive, continuous, taking into account under the technology that insulation pressure, electromagnetic shielding, heat distribute requires at the same time, the certainty of measurement of DC voltage transformer is difficult to be guaranteed. such as " GB/T26217-2010 " (HVDC transmission system DC voltage measuring device, national standard) regulation in generality requires: DC voltage transformer is " to the response accuracy of 50Hz voltage less than or equal to 1.0%, phase error is less than or equal to 500us ", the manufacture of DC voltage transformer is still all also limited to this index both at home and abroad so far, but this index can not meet the transient response technology requirement less than 50us in the engineer applied of flexible DC power transmission, therefore this area is needed badly at present and is sought some new structure schemes that can fundamentally change Traditional DC voltage transformer, dividing potential drop can be taken into account in particular for one, all press, the modular unit scheme of shielding and cooling measure.
Summary of the invention
It is an object of the invention to the defect overcoming prior art to exist, a kind of HVDC potentiometer standard package is provided, can as needed on the structural design basis of this standard package in practical application, it is uniformly coordinated the technology requirement of all pressure, dividing potential drop, heat radiation and four aspects of shielding, by being assembled by the series connection linking of several standard packages, and then the DC voltage transformer of the different electric pressure of composition.
The technical solution adopted for achieving the above object is such that
A kind of HVDC potentiometer standard package, be embedded in the cylindrical shape little insulating supporting skeleton of little metallic shield cylinder including a barrel and one be coaxially nested in little insulating supporting skeleton lower end or upper end and barrel is embedded in the big insulating supporting skeleton of cylindrical shape of big metallic shield cylinder, at the cylinder by two insulating supporting skeletons suits built with the divider resistance string of a standard block, it is provided with divider resistance junction point at the two ends of divider resistance string, interior all pressure/heat dissipating rings it are set with outside divider resistance string, the outer equalizing resistance string equipped with a standard block of cylinder at two insulating supporting skeleton suits, it is provided with equalizing resistance junction point at the two ends of equalizing resistance string, equipped with outer all pressure/heat dissipating rings outside equalizing resistance string.
In above-mentioned HVDC potentiometer standard package, the divider resistance string of one standard block is made up of two or more sets the equivalent parallel resistances being serially connected up and down, often the equivalent parallel resistance of group forms by the resistor coupled in parallel that two or more resistances are identical, the two ends of divider resistance string are welded and fix on circuit boards, leaving the pad hole that in the standard package that can adjoin with two ends, divider resistance series winding connects on circuit boards, the interior all pressure/heat dissipating rings being located at outside divider resistance string are done conducting with the series connection contact of divider resistance string and are connected.
In above-mentioned HVDC potentiometer standard package, inside all pressure/heat dissipating ring is fixing on circuit boards, conducting can be done with each the series connection contact on divider resistance string to be connected, also can arrange by principle at equal intervals, some series connection contact corresponding with on divider resistance string is done conducting and is connected, and inside all pressure/heat dissipating ring plays dispersion electric field and derives the dual function of heat.
In above-mentioned HVDC potentiometer standard package, the equalizing resistance string of one standard block is made up of two or more sets the equivalent parallel resistances being serially connected up and down, often the equivalent parallel resistance of group forms by the resistor coupled in parallel that two or more resistances are identical, the lead-in wire of each resistance is connected and fixed on the outer extension metallic plate of adjacent insulation framework cylinder, in the standard package that the lead-in wire at equalizing resistance string two ends can adjoin with two ends, equalizing resistance string is corresponding connects, the outer all pressure/heat dissipating rings being located at outside equalizing resistance string are done conducting with the series connection contact of equalizing resistance string and are connected, outer all pressure/heat dissipating rings also do conducting connection with embedding at adjacent little insulating supporting skeleton or the big intraskeletal little metallic shield cylinder of insulating supporting or big metallic shield cylinder simultaneously, outer all pressure/heat dissipating rings play dispersion electric field, derive heat and shield the effect of outfield interference for divider resistance string.
In above-mentioned HVDC potentiometer standard package, little insulating supporting skeleton and big insulating supporting skeleton are by epoxide resin material compression molding, little metallic shield cylinder and big metallic shield cylinder are overall respectively to be nested in the barrel of little insulating supporting skeleton and big insulating supporting skeleton, keeps being dielectrically separated between insulating supporting skeleton and metallic shield cylinder.
HVDC potentiometer standard package of the present invention can independently bear the voltage of the regulation of 10kV, can bear pressure in short-term (no less than one minute) of more than 2 times simultaneously.
Compared with prior art, the present invention gives full play to the technical advantage of electronic type voltage transformer small-signal sensing, in-site collecting, by DC voltage divider miniaturization, low-power, and its structure is reduced to a kind of can the stacked wafer module (namely each dividing potential drop assembly is a general part) of standard DC partial voltage assembly of building block assembling, assembled in series simply need only be made during assembling, the divider of different electric pressure can be formed.
Accompanying drawing explanation
Fig. 1 is structure (axle center section) schematic diagram of one specific embodiment of the present invention.
Fig. 2 is the structural representation being assembled into a HVDC potentiometer by the combination of N number of HVDC potentiometer standard package.
In accompanying drawing, the title of each number designation is respectively: 1-divider resistance string, 2-equalizing resistance string, equal pressure/heat dissipating ring outside 3-, the little shielding cylinder of 4-, the big shielding cylinder of 5-, all pressure/heat dissipating ring, the little insulating supporting skeleton of 7A-, the big insulating supporting skeleton of 7B-in 6-, junction point on 8-divider resistance string, junction point under 9-divider resistance string, junction point on 10-equalizing resistance string, junction point under 11-equalizing resistance string, 12-HV Terminal, 13-low-voltage arm resistance, 14-potentiometer base, 15-voltage divider output; I-HVDC potentiometer standard package.
Detailed description of the invention
Below with reference to drawings and Examples, present invention is described further, but the practical application form of the present invention is not limited in the embodiment of diagram.
Referring to Fig. 1, HVDC potentiometer standard package of the present invention is made up of parts such as insulating supporting skeleton, divider resistance string 1, equalizing resistance string 2, metallic shield cylinder, outer all pressure/heat dissipating rings 3, interior all pressure/heat dissipating rings 6, each standard package can independently bear the voltage (such as 10kV) of a regulation, can bear pressure in short-term (no less than one minute) of more than 2 times simultaneously. Structure and the function of each parts are as described below.
Insulating supporting skeleton insulating supporting skeleton is formed by by the little insulating supporting skeleton 7A and big insulating supporting skeleton 7B of the coaxially nested assembling of upper bottom, the internal diameter of its medium and small insulating supporting skeleton 7A, external diameter, height respectively 50mm, 70mm, 70mm, the internal diameter of big insulating supporting skeleton 7B, external diameter, height respectively 70mm, 90mm, 70mm, both is hot-forming by the epoxide resin material of high-strength insulating effect, is respectively embedded into little shielding cylinder 4 and big shielding cylinder 5 in the ring wall of little insulating supporting skeleton 7A and big insulating supporting skeleton 7B. Insulating supporting skeleton is the assembling carrier of standard package of the present invention, and it had both had the supporting role bearing potentiometer gravity, simultaneously because the nested combination up and down of two support frames forms electromagnetism confined spaces, therefore also act as dividing potential drop inter-module be dielectrically separated from effect.
Metallic shield cylinder is constituted (after nested assembling by being respectively embedded into little insulating supporting skeleton 7A with the little shielding cylinder 4 in big insulating supporting skeleton 7B ring wall with big shielding cylinder 5, shielding cylinder and insulating supporting bone still keep good being dielectrically separated from each other), two shielding cylinders are connected with a junction point of outer equalizing resistance string respectively, are isoelectric level chambeies with this junctional potential. Longitudinal nested structure of two metallic cylinder forms relatively airtight shielding space, can effectively shield the external environment condition electromagnetic field electromagnetic interference to divider resistance in cylinder 1. After multiple standard packages sequentially assemble, shielding cylinder forms vertical channel, has " chimney " effect of heat conduction, bootable cross-ventilation, effectively distributes resistance heat.
The divider resistance string 1 of 1 one standard blocks of divider resistance string is serially connected up and down is formed by two groups of (often group two) substitutional resistance in parallel, is the resistance string for high-acruracy survey, it may be achieved accurately dividing potential drop. Two tip nodes of divider resistance string 1 are welded respectively and are fixed on circuit board (pcb board), leave pad hole on circuit boards, can be connected with the standard package being positioned at upper and lower. In the present invention, each circuit board is respectively inserted in the cylinder of adjacent insulating supporting skeleton, the current potential that the current potential of its position is contacted on contact with outer equalizing resistance is corresponding one by one, so the Potential distribution on each divider resistance central point is equal with the current potential of place shielding cylinder, namely each divider resistance is in an equipotential shielding environment, has and resists outfield interference performance.
Equalizing resistance string 2 equalizing resistance string 2 is serially connected up and down is formed by three groups of (often group two) substitutional resistance in parallel, each resistance lead is connected and fixed on the outer extension metallic plate of adjacent two insulation framework (in Fig. 1, the upper and lower side of the equalizing resistance on both sides is all connected with the outer all pressure/heat dissipating rings being connected on metallic shield cylinder, so every a pair resistance is all parallel relationship, it is again series relationship up and down), the metallic plate that upper and lower two ends resistance lead can be connected with the standard package being positioned at upper and lower continues series connection. Equalizing resistance string 2 provides the current potential of distribution gradient for dividing potential drop assembly, and the upper-lower position at assembly place is different, can obtain the electric potential gradient corresponding with position on the corresponding junction point of equalizing resistance string. After N number of assembly is connected, total voltage is divided into each decile of N by equalizing resistance string, each Along ent connects grading ring, hot-line electrical potential is extended to " face " by " line " by grading ring, the surface field making conductor weakens, can effectively eliminating shelf depreciation, and make in vertical direction, the potential gradient between each joint is uniformly distributed.
Inside all in pressure/heat dissipating ring 6 all pressure/heat dissipating ring 6 be aluminum, be fixed on bleeder circuit plate, do conducting with the series connection contact of resistance each on divider resistance string 1 and be connected, for distributing the heat on divider resistance body, the cross-ventilation in shielding cylinder flows up derivation.
The outer outer all pressure/heat dissipating rings 3 of all pressure/heat dissipating rings 3 are aluminum, it is fixed on the outer place of insulating support, it is done conducting with a series connection contact of outer equalizing resistance string 2 and is connected, and do conducting connection with an adjacent metallic shield cylinder, isoelectric level is kept with metallic shield cylinder, amass for extending charged external surface, play anti-flashing, dispel the heat for resistance string and shield the multiple actions such as outfield interference for divider resistance string.
Can by the simple cascade process that assembling process simplification is a kind of standard package building blocks assembling mode of DC voltage transformer by the HVDC potentiometer standard package of design above, namely be combined into the DC voltage transformer of different electric pressure with a kind of standard package, the overall performance of DC voltage transformer is also ensured by assembly accordingly. Fig. 2 show a DC voltage divider of N number of standard package stack combinations. HVDC potentiometer standard package I therein is designed to have certain all pressures, dividing potential drop, shielding and heat-sinking capability, after N number of assembly is connected, constitute the high-voltage arm of DC voltage transformer, there is all pressures of N times of rated voltage, dividing potential drop, shielding and heat sinking function.
Such as, when design is as the potentiometer application of 200kV DC voltage transformer, adopt 20 dividing potential drop assembly series connection, total divider resistance and equalizing resistance are set to 200M �� (assembly dividing potential drop, equalizing resistance are 10M ��), so, dividing potential drop, equalizing current respectively 1mmA, low-voltage arm resistance 9 is set as 5k ��, and specified dividing potential drop is output as: Ut=5V. The 200kV potentiometer entirety being connected into by 20 dividing potential drop component string is inserted in insulated sleeve and is sealed at two ends, fills the SF6 gas of 0.4MP pressure, namely becomes a 200kV divider after loading onto potentiometer base 10. The 200kV DC voltage transformer that scheme is made accordingly, its property measured error is up to 0.2 grade, and pressure, office puts, transient response index is superior to GB, and continuous operation temperature rise is less than 20 DEG C.
Claims (6)
1. a HVDC potentiometer standard package, it is characterized in that: include a barrel be embedded in the cylindrical shape little insulating supporting skeleton (7A) of little metallic shield cylinder (4) and one be coaxially nested in little insulating supporting skeleton (7A) lower end or upper end and barrel is embedded in the big insulating supporting skeleton (7B) of cylindrical shape of big metallic shield cylinder (5), at the cylinder by two insulating supporting skeletons suits built with the divider resistance string (1) of a standard block, it is provided with divider resistance junction point at the two ends of divider resistance string (1), interior all pressure/heat dissipating rings (6) it are set with outside divider resistance string (1), the outer equalizing resistance string (2) equipped with a standard block of cylinder at two insulating supporting skeleton suits, it is provided with equalizing resistance junction point at the two ends of equalizing resistance string (2), in equalizing resistance string (2) outside equipped with outer all pressure/heat dissipating rings (3).
2. HVDC potentiometer standard package according to claim 1, it is characterized in that: the divider resistance string (1) of a standard block is made up of two or more sets the equivalent parallel resistances being serially connected up and down, often the equivalent parallel resistance of group forms by the resistor coupled in parallel that two or more resistances are identical, the two ends of divider resistance string (1) are welded and fix on circuit boards, leave the pad hole that in the standard package that can adjoin with two ends, divider resistance series winding connects on circuit boards, it is located at divider resistance string (1) interior all pressure/heat dissipating rings (6) outward to be connected with the series connection contact do conducting of divider resistance string (1).
3. HVDC potentiometer standard package according to claim 2, it is characterized in that: inside all pressure/heat dissipating ring (6) is fixing on circuit boards, conducting can be done with each the series connection contact on divider resistance string (1) to be connected, also can arranging by principle at equal intervals, corresponding some series connection contact upper with divider resistance string (1) is done conducting and is connected.
4. HVDC potentiometer standard package according to claim 1, it is characterized in that: the equalizing resistance string (2) of a standard block is made up of two or more sets the equivalent parallel resistances being serially connected up and down, often the equivalent parallel resistance of group forms by the resistor coupled in parallel that two or more resistances are identical, the lead-in wire of each resistance is connected and fixed on the outer extension metallic plate of adjacent insulation framework cylinder, in the standard package that the lead-in wire at equalizing resistance string (2) two ends can adjoin with two ends, equalizing resistance string is corresponding connects, it is located at equalizing resistance string (2) outer all pressure/heat dissipating rings (3) outward to be connected with the series connection contact do conducting of equalizing resistance string (2), outer all pressure/heat dissipating rings (3) are also done conducting with the little metallic shield cylinder (4) embedded in adjacent little insulating supporting skeleton (7A) or big insulating supporting skeleton (7B) or big metallic shield cylinder (5) simultaneously and are connected.
5. HVDC potentiometer standard package according to claim 1, it is characterized in that: described little insulating supporting skeleton (7A) and big insulating supporting skeleton (7B) are by epoxide resin material compression molding, little metallic shield cylinder (4) and big metallic shield cylinder (5) entirety respectively are nested in the barrel of little insulating supporting skeleton (7A) and big insulating supporting skeleton (7B), keep being dielectrically separated between insulating supporting skeleton and metallic shield cylinder.
6. HVDC potentiometer standard package according to claim 1, it is characterised in that: this HVDC potentiometer standard package can independently bear the voltage of the regulation of 10kV.
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| CN201410609899.7A CN105629017B (en) | 2014-11-03 | 2014-11-03 | A kind of high voltage direct current divider standard package |
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| CN201410609899.7A CN105629017B (en) | 2014-11-03 | 2014-11-03 | A kind of high voltage direct current divider standard package |
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| CN105629017B CN105629017B (en) | 2018-04-13 |
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| CN106546791A (en) * | 2016-11-18 | 2017-03-29 | 国家电网公司 | A kind of telescopically adjustable divider standard package |
| CN108627683A (en) * | 2017-03-23 | 2018-10-09 | 国家电网公司 | One kind ± 1100kV dividers |
| CN110832330A (en) * | 2017-06-13 | 2020-02-21 | 3M创新有限公司 | High-voltage impedance component |
| CN114334319A (en) * | 2021-12-14 | 2022-04-12 | 广东福德电子有限公司 | High-resistance high-voltage column type resistor |
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