CN208672702U - The capacitive voltage transformer of high pressure dry - Google Patents
The capacitive voltage transformer of high pressure dry Download PDFInfo
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- CN208672702U CN208672702U CN201820498375.9U CN201820498375U CN208672702U CN 208672702 U CN208672702 U CN 208672702U CN 201820498375 U CN201820498375 U CN 201820498375U CN 208672702 U CN208672702 U CN 208672702U
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Abstract
A kind of capacitive voltage transformer of high pressure dry, including capacitive divider and the electromagnetic unit being connect with capacitive divider, capacitive divider includes the interior capacitor C1 that constitutes of the capacitance plate that is arranged alternately of multiple and insulating layer in insulation mandrel outer wrap, and it is circumferentially positioned at the outer capacitor C2 outside interior capacitor C1, interior capacitor C1 and outer capacitor C2 capacitive divider in series, the tight enclosing insulating outer protective cover outside capacitive divider, interior capacitor C1 is connect with the tie point of outer capacitor C2 with electromagnetic unit, without insulator or organic insulation casing, without filling the dielectrics such as liquid or gas or liquid, it is easy to maintain, reduce many maintenances, maintenance workload.
Description
Technical field
The present invention relates to high-voltage electrical appliances fields, more particularly to a kind of capacitive voltage transformer of high pressure dry.
Background technique
Voltage transformer currently used for high pressure has electromagnetic type and two kinds of condenser type, capacitance type potential transformer abbreviation CVT,
There is many advantages, such as ferromagnetic resonance occurs for anti-locking system compared with electromagnetic potential transformer, is had increasingly been used for electric power
In system, capacitance type potential transformer is mainly made of capacitive divider and electromagnetic unit, and capacitive divider is concatenated by two
Capacitor composition, electromagnetic unit are mainly made of reactor, intermediate transformer etc., and the core of capacitance type potential transformer is electricity
Hold divider.Existing capacitance type potential transformer, capacitive divider is by being mounted on insulator or organic insulation set along axially stacked
Several series capacitors composition in pipe, insulator domestic demand vacuum technology are filled with insulating liquid or gas impregnated dose or liquid insulation Jie
Matter is to avoid shelf depreciation, but insulating liquid or gas are easy leakage in operation, insulate in longtime running and is easy dampness,
Dielectric dissipation factor increases, and ultimately causes dielectric breakdown, constitutes larger security risk to power grid.In addition, existing electromagnetic unit
It is made of intermediate transformer, reactor, arrester and the damping unit etc. in leakproof fuel cell, the space of top of oil-tank is filled
The technical issues of nitrogen, equally exists easy leakage, Maintenance Difficulty.
Summary of the invention
It is an object of the invention to overcome the deficiencies of existing technologies, provide a kind of without insulator or organic insulation casing, nothing
The capacitive voltage transformer of high pressure dry of the dielectrics such as liquid or gas or liquid need to be filled.
To achieve the above object, present invention employs following technical solutions:
A kind of capacitive voltage transformer of high pressure dry, including capacitive divider and the electromagnetism list being connect with capacitive divider
Member, capacitive divider include the interior capacitor that constitutes of the capacitance plate that is arranged alternately of multiple and insulating layer in 3 outer wrap of insulation mandrel
C1, and the outer capacitor C2 being circumferentially positioned at outside interior capacitor C1, interior capacitor C1 and outer capacitor C2 capacitive divider in series,
The outer tight enclosing insulating outer protective cover 6 of capacitive divider, interior capacitor C1 is connect with the tie point of outer capacitor C2 with electromagnetic unit, described
Electromagnetic unit is dry-type electromagnetic unit, including cabinet and setting in the intracorporal middle pressure dry-type voltage inductor 8 of case and dry type reactance
Device 9.
Preferably, upper flange is respectively equipped at the both ends of the interior capacitor C1 and outer capacitor C2 cylindrical capacitive divider constituted
1 and lower flange 2.
Preferably, interior capacitor C1 is connect with the tie point of outer capacitor C2 with middle pressure dry-type voltage inductor 8, in press dry formula electricity
Pressure mutual inductor 8 is connect with 9 one end of dry reactor, 9 other end of dry reactor ground connection；Alternatively, interior capacitor C1 and outer capacitor C2
Tie point connect with dry reactor 9, dry reactor 9 is connect with middle pressure dry-type voltage inductor 8, and middle pressure dry-type voltage is mutual
8 other end of sensor ground connection.
Preferably, upper flange is respectively equipped at the both ends of the interior capacitor C1 and outer capacitor C2 cylindrical capacitive divider constituted
1 and lower flange 2, cylindrical capacitive divider be assemblied on the cabinet 10 of dry-type electromagnetic unit, one end of interior capacitor C1 and upper method
Orchid 1 is electrically connected, and the other end is connected with outer capacitor C2, and the outer capacitor C2 other end passes through the earthing of casing of cabinet 10；Interior capacitor C1 with
The tie point of outer capacitor C2 is electrically connected by connector 7 with electromagnetic unit in box house.
Preferably, the interior capacitor C1 and the tie point of outer capacitor C2 box house by small insulation sleeve 12 with connect
Part 7 connects, and small insulation sleeve 12 is embedded in lower flange 2；The cabinet 10 is equipped with window 11, passes through window 11 when maintenance
The tie point that interior capacitor C1 and outer capacitor C2 can be connected is detected.
Preferably, the interior capacitor C1 include it is multiple surround the capacitance plate that insulation mandrel 3 is outer and insulating layer is arranged alternately,
The be included lower surface of capacitor C1 of the outer capacitor C2 continues the capacitance plate that is arranged alternately of multiple and insulating layer of coiling,
The interior outermost capacitance plate of capacitor C1 is connect with the outer innermost capacitance plate of capacitor C2.
Preferably, the interior capacitor C1 include it is multiple surround the capacitance plate that insulation mandrel 3 is outer and insulating layer is arranged alternately,
The outer capacitor C2 is the annular capacitor of independent coiling, is set in the lower outside of interior capacitor C1, the head end electricity of outer capacitor C2
Pole is connect with the end electrodes of interior capacitor C1.
Preferably, the interior capacitor C1 is made of interior capacitance component, and interior capacitance component is included in 3 outer wrap of insulation mandrel
Multiple capacitance plates being arranged alternately with insulating layer；The interior capacitor C1 is made of an interior capacitance component, in an interior capacitor
The outer lower portion of component is arranged with outer capacitor C2, and the head end electrode of outer capacitor C2 is connect with the end electrodes of interior capacitance component；Or
Person, the interior capacitor C1 be made of multiple interior capacitance components, and lower layer is stacked to a column to multiple interior capacitance components vertically
Shape component is connected in series between the interior capacitance component of cylindrical member upper and lower level, the interior capacitance component lower part of cylindrical member bottom
Outer sheath is equipped with an outer capacitor C2, the end electricity of the interior capacitance component of the head end electrode and cylindrical member bottom of outer capacitor C2
Pole connection.
Preferably, the interior capacitor C1 is made of interior capacitance component, and interior capacitance component is included in 3 outer wrap of insulation mandrel
Multiple capacitance plates being arranged alternately with insulating layer；The interior capacitor C1 is made of multiple interior capacitance components, multiple interior capacitance groups
Part is axially stacked at multiple cylindrical members, and each cylindrical member includes the interior capacitance component of multiple series connections, each column group
The interior capacitance component of same layer is connected in parallel between part, and the interior capacitance component lower outside of each cylindrical member bottom is arranged with one
A outer capacitor C2, the head end electrode of outer capacitor C2 are connected with the end electrodes of the interior capacitance component of corresponding shape component bottom.
Preferably, the interior capacitor C1 is made of two interior capacitance components in parallel, and interior capacitance component is included in insulating core
The capacitance plate that the multiple and insulating layer of 3 outer wrap of stick is arranged alternately, the lower outside of two interior capacitance components are arranged with dispatch from foreign news agency
Hold C2, two interior capacitance components are mounted on the cabinet of electromagnetic unit at V-type.
Preferably, medium pressure dry-type voltage inductor 8 and dry reactor 9 be fixed in the cabinet of electromagnetic unit and
Every setting, the shell of middle pressure dry-type voltage inductor 8 and dry reactor 9 uses insulating resin or silicon rubber moulding by casting.
Preferably, interior capacitor C1 surround multiple capacitance plates outside insulation mandrel 3 by the positive capacitance plate group that is arranged alternately and
Stiffness screen group is constituted, and wherein most inner side and outermost are positive capacitance plate group；The positive capacitance plate group include it is multiple with it is exhausted
The capacitance plate that edge layer is arranged alternately, the positive innermost capacitance plate of capacitance plate group connect high potential, and outermost capacitance plate connects low potential；
The stiffness screen group includes multiple capacitance plates being arranged alternately with insulating layer, and the innermost capacitance plate of stiffness screen group connects low
Current potential, outermost capacitance plate connect high potential.
The capacitive voltage transformer of high pressure dry of the invention, capacitive divider include surround it is interior on insulation mandrel 3
The radial direction of capacitor C1 and the outer capacitor C2 being circumferentially positioned at outside interior capacitor C1, interior capacitor C1 and outer capacitor C2 along voltage transformer
It is arranged, the multiple capacitance plates and insulating layer for constituting interior capacitor C1 and outer capacitor C2 are arranged alternately to surround and be formed closely on insulation mandrel
Prismoid structure, the tight enclosing insulating outer protective cover 6 outside capacitive divider, compared to along the existing of axially stacked setting capacitor
Capacitive voltage transformer, no setting is required accommodates insulator or organic insulation casing, there are no need to capacitor and insulator or it is organic absolutely
Gas leak of the oil leakage problem is not present in the dielectric that liquid or gas or liquid are filled between edge casing, easy to maintain, reduces very
Multidimensional shield, maintenance workload.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the capacitive voltage transformer embodiment one of high pressure dry of the present invention；
Fig. 2 is the structural schematic diagram of the capacitive voltage transformer embodiment two of high pressure dry of the present invention；
Fig. 3 is the structural schematic diagram of the capacitive voltage transformer embodiment three of high pressure dry of the present invention.
Specific embodiment
Below in conjunction with the embodiment that attached drawing 1 to 3 provides, the capacitive mutual induction of voltage of high pressure dry of the invention is further illustrated
The specific embodiment of device.The capacitive voltage transformer of high pressure dry of the invention is not limited to the following description.
The capacitive voltage transformer of high pressure dry of the invention, including capacitive divider and the electricity being connect with capacitive divider
Magnetic cell, capacitive divider include in the capacitance plate that is arranged alternately of multiple and insulating layer of 3 outer wrap of insulation mandrel is constituted
Capacitor C1, and the outer capacitor C2 being circumferentially positioned at outside interior capacitor C1, interior capacitor C1 and outer capacitor C2 capacitance partial pressure in series
The tie point and electromagnetic unit of device, the tight enclosing insulating outer protective cover 6 outside capacitive divider, interior capacitor C1 and outer capacitor C2 connect
It connects.
The capacitive voltage transformer of high pressure dry of the invention, capacitive divider include surround it is interior on insulation mandrel 3
The radial direction of capacitor C1 and the outer capacitor C2 being circumferentially positioned at outside interior capacitor C1, interior capacitor C1 and outer capacitor C2 along voltage transformer
Setting, peripheral hardware are closely coated on outer insulating outer protective cover, and the multiple capacitance plates and insulating layer for constituting interior capacitor C1 are arranged alternately packet
It is wound on insulation mandrel 3 and forms approximate column structure, compared to the existing capacitive mutual induction of voltage along axially stacked setting capacitor
Device, no setting is required accommodates insulator or organic insulation casing, and there are no need to fill between capacitor and insulator or organic insulation casing
Gas leak of the oil leakage problem is not present in the dielectric of liquid or gas or liquid, easy to maintain, reduces many maintenances, check man
It measures.
Embodiment one
As shown in Figure 1, the high pressure dry capacitance type potential transformer of the present embodiment includes capacitive divider and divides with capacitor
The electromagnetic unit of depressor connection.Capacitive divider includes insulation mandrel 3, is replaced with insulating layer 3 outer wrap of insulation mandrel is multiple
The capacitance plate of setting constitutes the interior capacitor C1 of approximate column construction, and outer capacitor C2 is circumferentially positioned at the lower part interior capacitor C1, interior capacitor
The capacitive divider of C1 and outer capacitor C2 dry type in series, the both ends of column construction are respectively equipped with upper flange 1 and lower flange 2,
Insulating outer protective cover 6 is externally provided in interior capacitor C1 and outer capacitor C2.The head end electrode (most inner side capacitance plate) of interior capacitor C1 and upper method
Orchid 1 is electrically connected, the end electrodes (outermost capacitance plate) of interior capacitor C1 and the head end electrode (most inner side capacitance plate) of outer capacitor C2
Electrical connection, interior capacitor C1 are electrically connected with the tie point A (middle pressure point) of outer capacitor C2 with electromagnetic unit, the end electrodes of outer capacitor C2
(outermost capacitance plate) ground connection, the capacitive divider of approximate column construction are vertically fixedly mounted on the cabinet 10 of electromagnetic unit,
Its outer capacitor C2 partial insertion cabinet 10, the end electrodes (outermost capacitance plate) of outer capacitor C2 can be passed through electromagnetic unit
Cabinet 10 is grounded.
The electromagnetic unit mainly includes middle medium-voltage potential transformers and reactor, can also include damper etc. other members
Part.Preferably, the electromagnetic unit is dry-type electromagnetic unit, and formula electricity is pressed dry including cabinet 10 and in being arranged in cabinet 10
Pressure mutual inductor 8 and dry reactor 9, middle pressure dry-type voltage inductor 8 are connect with dry reactor 9, the capacitor of near cylindrical
Divider is vertically-mounted on cabinet 10 or will be in its outer capacitor C2 partial insertion cabinet 10.The interior capacitor C1 and outer capacitor
The tie point A (middle pressure point) of C2 is connect with the head end of middle pressure dry-type voltage inductor 8, the tail end of middle pressure dry-type voltage inductor 8
It connects with 9 head end of dry reactor, 9 tail end of dry reactor ground connection, alternatively, the tie point A of interior capacitor C1 and outer capacitor C2
(middle pressure point) is connect with dry reactor 9, and dry reactor 9 is connect with middle pressure dry-type voltage inductor 8, and middle pressure dry-type voltage is mutual
8 other end of sensor ground connection.
Preferably, connector 7 is equipped in the cabinet of electromagnetic unit, connector 7 can be connection conductor or conducting wire, interior
Capacitor C1 is connect by small insulation sleeve 12 with connector 7 with the tie point A (middle pressure point) of outer capacitor C2 in box house, and is led to
It crosses connector to connect with middle 8 head end of pressure dry-type voltage inductor, without being arranged outside the cabinet of electromagnetic unit for the company of connection
The additional sleeve and conducting wire of contact A (middle pressure point) and electromagnetic unit, the tail end and dry reactor 9 of middle pressure dry-type voltage inductor
Head end series connection, dry reactor tail end ground connection.It is of course also possible to which portion is arranged for connecting tie point A (middle pressure point) outside the enclosure
With the additional sleeve of electromagnetic unit, it be easy to cause the short circuit of middle pressure point in this way, also will increase corresponding cost；In addition, interior capacitor
The tie point A (middle pressure point) of C1 and outer capacitor C2 can also be connected to first dry reactor by connector 7, then concatenate again in press
Dry-type voltage inductor.
Preferably, the cabinet 10 is equipped with window 11, when maintenance by window 11 can to capacitor C1 in connecting with
The tie point of outer capacitor C2 is detected.It such as when a failure occurs, can individually internal capacitor C1 or outer capacitor C2 power-up inspection
It looks into, convenient for the exclusion of wiring and failure.
Specific embodiment as shown in Figure 1, cabinet 10 at inverted " convex " word (being also possible to other shapes), in press dry formula
Voltage transformer 8 (PT) and dry reactor 9 are fixed in cabinet and interval setting, is equipped in the one or both sides of cabinet 10
Window 11, middle pressure dry-type voltage inductor 8 be arranged dry reactor 9 above and with the setting of the interval of dry reactor 9, in press dry
The shell of formula voltage transformer 8 (PT) and dry reactor 9 can use insulating resin or silicon rubber moulding by casting, electromagnetic unit
Dry type cast-type insulating device is made in interior device, and filling dielectric is not required in cabinet, prevents oil leak, kindling, explosion, pollution
Environment decreases many maintenances, maintenance workload.
The narrow wide trapezoidal connector 7 in the case where the top of middle pressure dry-type voltage inductor 8 is equipped with, interior capacitor C1 and outer
The capacitive divider for the dry type that capacitor C2 is constituted vertically is fixedly mounted on cabinet 10, and the lower flange 2 of capacitive divider is embedded in case
In body 10, lower flange 2 is fixedly connected with the shell of cabinet 10, and lower flange 2 can pass through the frame ground of cabinet 10, outer capacitor
C2 can not be embedded or partially embedded in cabinet 10, and small insulation sleeve 12 is embedded in lower flange 2, interior capacitor C1 and outer capacitor C2's
Tie point A (middle pressure point) passes through small insulation sleeve 12 in box house and connect with connector 7, and outer capacitor C2 can pass through lower flange 2
Ground connection.
The interior capacitor C1 includes multiple surrounding the capacitance plate that insulation mandrel 3 is outer and insulating layer is arranged alternately, interior capacitor
Multiple capacitance plates of C1 are that the coaxial circles cylindrical metallic that is gradually increased of multiple diameters or semicoductor capacitor screen are constituted, and insulating layer can be with
Using organic film insulation or epoxy glass fiber, insulation mandrel 3 can be using nylon or epoxy resin or other insulating materials
Stick.As one embodiment, the outer capacitor C2 be interior capacitor C1 lower surface continue the multiple of coiling or laying with
The capacitance plate that insulating layer is arranged alternately, the interior outermost capacitance plate of capacitor C1 is connect with the outer innermost capacitance plate of capacitor C2, interior
Capacitor C1 and outer capacitor C2 are made into integration.Further, anti-tampering capacitor C3 can also be set outside interior capacitor C1 and outer capacitor C2, with
Prevent the external interference to capacitive divider, anti-tampering capacitor C3 is multiple upper flange one end from capacitive divider to lower flange
Other end mutually insulated mutually nestable capacitance plate again.It is externally provided with absolutely in interior capacitor C1, outer capacitor C2 and anti-tampering capacitor C3
Edge oversheath 6, insulating outer protective cover 6 are flexible insulation of the tight enclosing outside interior capacitor C1, outer capacitor C2 and anti-tampering capacitor C3
There is no gap between structure, with capacitor insulation structure, insulating outer protective cover 6 can use heat-shrink tube or silicone rubber tube, preferably adopt
With the insulating outer protective cover 6 with full skirt.
As another embodiment of outer capacitor C2, the outer capacitor C2 is the annular capacitor of independent coiling, is set in
The lower outside of interior capacitor C1, the head end electrode of outer capacitor C2 are connect with the end electrodes of interior capacitor C1, the end of outer capacitor C2
Electrode ground connection.It is externally provided with the insulating outer protective cover 6 with full skirt in interior capacitor C1, insulating outer protective cover 6 is tightly attached to outside interior capacitor C1, insulation
Oversheath 6 can not be wrapped in outside outer capacitor C2, can also be partly or entirely wrapped on the outside of outer capacitor C2, insulating outer protective cover 6
Heat-shrink tube or silicone rubber tube can be used.
Embodiment two
As shown in Fig. 2, the high pressure dry capacitance type potential transformer of the present embodiment includes capacitive divider and divides with capacitor
The electromagnetic unit of depressor connection.Capacitive divider includes the interior capacitor C1 and outer capacitor C2 being connected in series；The interior capacitor C1
It is made of an interior capacitance component or multiple interior capacitance components, each interior capacitance component includes in the more of 3 outer wrap of insulation mandrel
The both ends of a capacitance plate being arranged alternately with insulating layer, each interior capacitance component are respectively equipped with upper flange 1 and lower flange 2, interior electricity
Hold component and is externally provided with insulating outer protective cover 6.
, capacitance lesser high pressure CVT, interior capacitor C1 lower for voltage class can be made of an interior capacitance component
(such as shown in Fig. 1) is arranged with outer capacitor C2 in the outer lower portion of an interior capacitance component, the head end electrode of outer capacitor C2 with it is interior
The end electrodes of capacitance component connect, the end electrodes ground connection of outer capacitor C2；Alternatively, and capacitance lower for voltage class compared with
Big CVT, interior capacitor C1 can be made of two or more interior capacitance component parallel connections, and multiple interior capacitance components pass through laxative remedy
Orchid is installed on cabinet (or in cabinet), and the outer cover of multiple interior capacitance components is equipped with outer capacitor C2, multiple interior capacitance groups
It is connected between the upper flange of part by crossing connecting bridge 13；, capacitance lesser high pressure CVT higher for voltage class, interior capacitor C1 can
To be made of multiple interior capacitance components, lower layer is stacked to a cylindrical member, column group to multiple interior capacitance components vertically
It is connected in series, is arranged in the interior capacitance component lower outside of cylindrical member bottom outer between the interior capacitance component of part upper and lower level
Capacitor C2, cylindrical member are vertically installed on the cabinet of dry-type electromagnetic unit, the head end electrode of outer capacitor C2 and bottom it is interior
The end electrodes of capacitance component connect, the end electrodes ground connection of outer capacitor C2, and the tie point of interior capacitor C1 and outer capacitor C2 are in case
Internal portion is electrically connected with electromagnetic unit by connector 7 through connector 7 and dry-type voltage inductor 8 (PT) or dry reactor
9 connections.
, capacitance biggish high pressure CVT higher for voltage class, interior capacitor C1 is made of multiple interior capacitance components, more
A interior capacitance component is axially stacked at multiple cylindrical members, and each cylindrical member includes multiple interior capacitance components, each column
The interior capacitance component lower outside of component bottom is arranged with an outer capacitor C2, the interior capacitance group of each cylindrical member bottom
Part is connected with the head end electrode of corresponding outer capacitor C2, the end electrodes ground connection of outer capacitor C2, the interior electricity in each cylindrical member
Hold upper and lower level between component to be connected in series, the interior capacitance component of same layer is connected in parallel by connecting bridge 13 between each cylindrical member.
Multiple cylindrical members are vertically installed on the cabinet of dry-type electromagnetic unit, the interior capacitance component lower part of each cylindrical member bottom
The interior capacitance component of head end electrode and corresponding bottom of outer capacitor C2 connect, tail end electrode ground connection, outer capacitor C2 with it is interior
The tie point of capacitor C1 is connect by connector 7 with dry-type voltage inductor 8 (PT) or dry reactor 9.
Specifically, embodiment as shown in Figure 2, is provided with two cylindrical members, Mei Gezhu on the cabinet of electromagnetic unit
Shape component respectively includes stack 3 interior capacitance components, is connected in series between 3 interior capacitance components on each interior capacitance component
To bear higher voltage, the upper flange of the capacitance component of two cylindrical member same layers is connected in parallel by connecting bridge 13 to increase
Capacitance；1 outer capacitor C2 is arranged with outside the lower part of the undermost interior capacitance component of two cylindrical members respectively, outer capacitor C2 divides
It does not connect with the undermost interior capacitance component of corresponding cylindrical member, and tie point A (the middle pressure of interior capacitor C1 and outer capacitor C2
Point) it is connect respectively by connector 7 with middle pressure dry-type voltage inductor 8 (PT) in cabinet.
Embodiment three
As shown in figure 3, the capacitive voltage transformer of the high pressure dry of the embodiment of the present invention three, identical with embodiment two
It is that capacitive divider includes the interior capacitor C1 and outer capacitor C2 being connected in series；The interior capacitor C1 is by multiple interior capacitance components
It constitutes, unlike, the interior capacitance component is mounted on the cabinet 10 of electromagnetic unit at V-type.It is specific as described in Figure 3, institute
It states interior capacitor C1 to be made of two interior capacitance components in parallel, can be adapted for that voltage class is lower, the biggish high pressure of capacitance
CVT, it is each in capacitance component include the capacitance plate that is arranged alternately of multiple and insulating layer in 3 outer wrap of insulation mandrel, in two
The both ends of capacitance component are equipped with upper flange 1 and lower flange 2, and two interior capacitance components are connected in parallel by connecting bridge 13, dispatch from foreign news agency
The head end electrode for holding C2 is connect with the end electrodes of interior capacitance component, the end electrodes ground connection of outer capacitor C2, two interior capacitance groups
Part and outer capacitor C2 are mounted on the cabinet 10 of electromagnetic unit at V-shaped, the connection of interior capacitance component and corresponding outer capacitor C2
Point (middle pressure point) is connect by connector 7 with middle pressure dry-type voltage inductor 8 (PT) respectively in cabinet.
Example IV
The high pressure dry capacitance type potential transformer of the present embodiment includes capacitive divider and connect with capacitive divider
Electromagnetic unit.Capacitive divider includes the interior capacitor C1 and outer capacitor C2 being connected in series, and the interior capacitor C1 is included in insulation
The capacitance plate that the multiple and insulating layer of 3 outer wrap of plug is arranged alternately.In order to make interior capacitor C1 be able to bear the same of high voltage
When, additionally it is possible to there is bigger capacitance, such as capacitance can reach 10000pf in 110KV, can reach in 220KV
To 5000pf, so that the tie point A (middle pressure point) of interior capacitor C1 and outer capacitor C2 goes out voltage and can reach 20KV or so, this hair
Bright interior capacitor C1 is arranged by the way of the positive capacitance plate group and stiffness screen group being arranged alternately.
Specifically, the interior capacitor C1 surrounds multiple capacitance plates outside insulation mandrel 3 by the positive capacitor that is arranged alternately
Screen group and stiffness screen group are constituted, and wherein most inner side and outermost are positive capacitance plate group；The positive capacitance plate group includes more
A capacitance plate being arranged alternately with insulating layer, the positive innermost capacitance plate of capacitance plate group connect high potential, and outermost capacitance plate connects
Low potential；The stiffness screen group includes multiple capacitance plates being arranged alternately with insulating layer, the innermost electricity of stiffness screen group
Rong Ping connects low potential, and outermost capacitance plate connects high potential.The capacitance plate of positive capacitance plate group and stiffness screen group be diameter gradually
The coaxial circles cylindrical metallic or semicoductor capacitor screen of increasing are constituted, and insulating layer can use organic insulation film, and insulation mandrel 3 can
To use nylon rod or epoxy resin stick.Preferably, the capacitance plate of positive capacitance plate group and stiffness screen group is coaxially to be arranged concentrically.
The outer capacitor C2 can be made of the multiple capacitance plates for continuing coiling outside the capacitance plate of interior capacitor C1, be also possible to independence
The annular capacitor of coiling is set in the lower outside of interior capacitor C1.Certainly, the structure of the interior capacitor C1 of the present embodiment can also be used
Interior capacitance component in embodiment two and three.
The high-voltage mutual inductor of the embodiment of the present invention is dry-type capacitance type, and interior capacitor C1 and outer capacitor C2 are along voltage transformer
Be arranged radially, be not necessarily to insulator and fill insulant, and be suitable for hyperbaric environment, high pressure here be often referred to 10KV and with
On voltage, major advantage includes:
1, oil-free: the interior insulation of capacitive divider be organic film insulation, external insulation is silicon rubber insulation, without insulator,
Without being filled with filling liquid or the insulating materials such as gas or liquid；Electromagnetic unit part may be made as dry type cast-type insulator
Part；It solves the problems, such as the oil leak, kindling, explosion, pollution environment of oily formula voltage transformer, decreases many maintenances, maintenance
Workload.
2, the outermost layer of capacitive divider China and foreign countries capacitor C2 is ground connection, can be inserted in shell, is not exposed in air,
Interior capacitor C1 is connect in box house with electromagnetic unit with the tie point A (middle pressure point) of outer capacitor C2, prevents from pressing in foreign matter short circuit
Point presses insulator, stability good because polluting in short circuit.
3, single arm type or multi-arm type standard component, which can be made, can directly stack when voltage class improves, be conducive to mark
Quasi- metaplasia produces.
4, high pressure CVT lower for voltage class, can be connected in parallel capacitive divider with V-shaped.
5, connector is that pressure point and middle medium-voltage potential transformers (can also first connect reactance in pressure point or multi-arm in connection single armed
Device) device, constitute good electrical connection.
6, the cabinet shell windowing of electromagnetic unit.C1, C2 numerical value, also convenient to overhaul, installation can be measured respectively.
7, being formed by the way of positive capacitance plate group and stiffness screen group can be adapted in the high capacitance under high voltage
Capacitor, such as in 110KV, capacitance can reach 10000pf, and 5000pf can be reached in 220KV, so that interior capacitor C1
20KV or so can be reached by going out voltage with the tie point A (middle pressure point) of outer capacitor C2.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (12)
1. a kind of capacitive voltage transformer of high pressure dry, including capacitive divider and the electromagnetism list being connect with capacitive divider
Member, it is characterised in that: capacitive divider is included in the capacitance plate that the multiple and insulating layer of insulation mandrel (3) outer wrap is arranged alternately
Constitute interior capacitor C1, and the outer capacitor C2 being circumferentially positioned at outside interior capacitor C1, interior capacitor C1 and outer capacitor C2 it is in series
The tie point and electricity of capacitive divider, tight enclosing insulating outer protective cover (6) outside capacitive divider, interior capacitor C1 and outer capacitor C2
Magnetic cell connection, the electromagnetic unit be dry-type electromagnetic unit, including cabinet and be arranged it is mutual in the intracorporal middle pressure dry-type voltage of case
Sensor (8) and dry reactor (9).
2. the capacitive voltage transformer of high pressure dry according to claim 1, it is characterised in that: in interior capacitor C1 and dispatch from foreign news agency
The both ends for holding the cylindrical capacitive divider that C2 is constituted are respectively equipped with upper flange (1) and lower flange (2).
3. the capacitive voltage transformer of high pressure dry according to claim 1, it is characterised in that: interior capacitor C1 and outer capacitor
The tie point of C2 is connect with middle pressure dry-type voltage inductor (8), middle pressure dry-type voltage inductor (8) and dry reactor (9) one
End connection, dry reactor (9) other end ground connection；Alternatively, tie point and dry reactor (9) of interior capacitor C1 and outer capacitor C2
Connection, dry reactor (9) are connect with middle pressure dry-type voltage inductor (8), another termination of middle pressure dry-type voltage inductor (8)
Ground.
4. the capacitive voltage transformer of high pressure dry according to claim 3, it is characterised in that: in interior capacitor C1 and dispatch from foreign news agency
The both ends for holding the cylindrical capacitive divider that C2 is constituted are respectively equipped with upper flange (1) and lower flange (2), cylindrical capacitive divider
It is assemblied on the cabinet (10) of dry-type electromagnetic unit, one end of interior capacitor C1 is electrically connected with upper flange (1), the other end and outer capacitor
C2 series connection, the outer capacitor C2 other end pass through the earthing of casing of cabinet (10)；The tie point of interior capacitor C1 and outer capacitor C2 is in cabinet
Inside is electrically connected by connector (7) with electromagnetic unit.
5. the capacitive voltage transformer of high pressure dry according to claim 4, it is characterised in that: the interior capacitor C1 and outer
The tie point of capacitor C2 is connect by small insulation sleeve (12) with connector (7) in box house, and small insulation sleeve (12) is embedded in down
In flange (2)；The cabinet (10) is equipped with window (11), can connect interior capacitor C1 and outer by window (11) when maintenance
The tie point of capacitor C2 is detected.
6. the capacitive voltage transformer of high pressure dry according to claim 1, it is characterised in that: the interior capacitor C1 includes
Multiple capacitance plates for surrounding insulation mandrel (3) and being arranged alternately outside with insulating layer, the outer capacitor C2 are included capacitor C1
Lower surface continue the capacitance plate that is arranged alternately of multiple and insulating layer of coiling, the outermost capacitance plate of interior capacitor C1 and dispatch from foreign news agency
Hold the innermost capacitance plate connection of C2.
7. the capacitive voltage transformer of high pressure dry according to claim 1, it is characterised in that: the interior capacitor C1 includes
Multiple capacitance plates for surrounding insulation mandrel (3) and being arranged alternately outside with insulating layer, the outer capacitor C2 are the ring of independent coiling
Shape capacitor, is set in the lower outside of interior capacitor C1, and the head end electrode of outer capacitor C2 is connect with the end electrodes of interior capacitor C1.
8. the capacitive voltage transformer of high pressure dry according to claim 1, it is characterised in that: the interior capacitor C1 is by interior
Capacitance component is constituted, and interior capacitance component is included in the capacitance plate that the multiple and insulating layer of insulation mandrel (3) outer wrap is arranged alternately；
The interior capacitor C1 is made of an interior capacitance component, is arranged with outer capacitor in the outer lower portion of an interior capacitance component
The head end electrode of C2, outer capacitor C2 are connect with the end electrodes of interior capacitance component；
Alternatively, the interior capacitor C1 is made of multiple interior capacitance components, lower layer is stacked to multiple interior capacitance components vertically
One cylindrical member is connected in series between the interior capacitance component of cylindrical member upper and lower level, the interior capacitance group of cylindrical member bottom
Part lower outside is arranged with an outer capacitor C2, the interior capacitance component of the head end electrode and cylindrical member bottom of outer capacitor C2
End electrodes connection.
9. the capacitive voltage transformer of high pressure dry according to claim 1, it is characterised in that: the interior capacitor C1 is by interior
Capacitance component is constituted, and interior capacitance component is included in the capacitance plate that the multiple and insulating layer of insulation mandrel (3) outer wrap is arranged alternately；
The interior capacitor C1 is made of multiple interior capacitance components, and multiple interior capacitance components are axially stacked at multiple cylindrical members,
Each cylindrical member includes the interior capacitance component of an interior capacitance component or multiple series connections, same layer between each cylindrical member
Interior capacitance component is connected in parallel, and the interior capacitance component lower outside of each cylindrical member bottom is arranged with an outer capacitor C2,
The head end electrode of outer capacitor C2 is connected with the end electrodes of the interior capacitance component of corresponding cylindrical member bottom.
10. the capacitive voltage transformer of high pressure dry according to claim 1, it is characterised in that: the interior capacitor C1 by
Two interior capacitance components in parallel are constituted, and interior capacitance component is included in multiple the replacing with insulating layer of insulation mandrel (3) outer wrap
The capacitance plate of setting, the lower outside of two interior capacitance components are arranged with outer capacitor C2, and two interior capacitance components are installed at V-type
On the cabinet of electromagnetic unit.
11. the capacitive voltage transformer of high pressure dry according to claim 3, it is characterised in that: medium pressure dry type electricity
Pressure mutual inductor (8) and dry reactor (9) are fixed in the cabinet of electromagnetic unit and interval setting, middle pressure dry-type voltage inductor
(8) and the shell of dry reactor (9) uses insulating resin or silicon rubber moulding by casting.
12. the capacitive voltage transformer of high pressure dry according to claim 1, it is characterised in that: interior capacitor C1 surrounds
The multiple capacitance plates of insulation mandrel (3) outside are made of the positive capacitance plate group and stiffness screen group being arranged alternately, wherein most inner side and
Outermost is positive capacitance plate group；
The positive capacitance plate group includes multiple capacitance plates being arranged alternately with insulating layer, the positive innermost capacitance plate of capacitance plate group
High potential is connect, outermost capacitance plate connects low potential；The stiffness screen group includes multiple electricity being arranged alternately with insulating layer
Rong Ping, the innermost capacitance plate of stiffness screen group connect low potential, and outermost capacitance plate connects high potential.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820498375.9U CN208672702U (en) | 2018-04-09 | 2018-04-09 | The capacitive voltage transformer of high pressure dry |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820498375.9U CN208672702U (en) | 2018-04-09 | 2018-04-09 | The capacitive voltage transformer of high pressure dry |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112362951A (en) * | 2020-11-23 | 2021-02-12 | 云南电网有限责任公司临沧供电局 | Buckle formula is based on embedded capacitive screen's overvoltage monitoring devices |
| US20220223337A1 (en) * | 2020-06-10 | 2022-07-14 | Suzhou Apparatus Science Academy Co., Ltd. | Capacitive voltage transformer |
-
2018
- 2018-04-09 CN CN201820498375.9U patent/CN208672702U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220223337A1 (en) * | 2020-06-10 | 2022-07-14 | Suzhou Apparatus Science Academy Co., Ltd. | Capacitive voltage transformer |
| US11894180B2 (en) * | 2020-06-10 | 2024-02-06 | Suzhou Apparatus Science Academy Co., Ltd. | Capacitive voltage transformer |
| CN112362951A (en) * | 2020-11-23 | 2021-02-12 | 云南电网有限责任公司临沧供电局 | Buckle formula is based on embedded capacitive screen's overvoltage monitoring devices |
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