CN202601421U

CN202601421U - Chain-type capacitor

Info

Publication number: CN202601421U
Application number: CN 201220249569
Authority: CN
Inventors: 杨峰; 姚海明; 蔡强; 胥卫; 周莉萍; 张辉
Original assignee: JIANGSU KEXING ELECTRICAL APPLIANCES CO Ltd
Current assignee: JIANGSU KEXING ELECTRICAL APPLIANCES CO Ltd
Priority date: 2012-05-30
Filing date: 2012-05-30
Publication date: 2012-12-12
Anticipated expiration: 2022-05-30

Abstract

The utility model relates to a chain-type capacitor, the chain-type capacitor comprises a plurality of capacitor bodies, the capacitor bodies are connected in series and in sequence, the plurality of the capacitor bodies coil along the axial direction of an input high-voltage electrode from the inside out, an electrode plate of a first capacitor body on the inner layer coils on the input high-voltage electrode which is of a cylindrical shape and is connected with the input high-voltage electrode, an insulating medium coils around the electrode plate of the first capacitor body, an electrode plate of a second capacitor body coils on the insulating medium around the electrode plate of the first capacitor body, an insulating medium coils around the electrode plate of the second capacitor body, and the plurality of the capacitor bodies coil to form the chain-type capacitor by encapsulation of epoxy resin. The plurality of the capacitor bodies adopt a coaxial coiling mode to be connected in series to form the capacitor and the chain-type capacitor has the advantages of being simple in structure, small in size, low in production cost and high in reliability, and the like. The chain-type capacitor is applied to voltage measurement and relay protection and use in a digital substation.

Description

The chain type capacitor

Technical field

The utility model relates to a kind of chain type capacitor.

Background technology

Traditional capacitor low-pressure side electric capacity directly with the direct series coupled of on high-tension side electric capacity, the centre has no electrical isolation, is subject to Influence of Temperature, stability, reliability are not high, exist bigger potential safety hazard.When short circuit or open circuit fault occurring in the high-pressure side; The suitable path of energy neither one that is stored in the electric capacity supplies its rapid release; Common " the electric charge capture phenomenon " of indication just; The electric charge that gathers on the equivalent ground capacity of dividing potential drop electric capacity can not discharge when reclosing fully; Error component of stack has influence on the correctness of measurement result and the correct operation of protective relaying device on system works voltage, and long-term work time equivalence ground capacity also can Yin Wendu etc. factor influence and become stable inadequately.

Summary of the invention

The purpose of the utility model is to overcome deficiency such as grade of the prior art, and provides a kind of simple in structure, the novel coiling chain type capacitor that reliability is high.

The technical scheme that the utility model adopts is: a kind of chain type capacitor; It is characterized in that: said capacitor is composed in series by a plurality of electric capacity successively; A plurality of electric capacity are reeled along input high-field electrode axial direction from inside to outside; The pole plate of first electric capacity of internal layer is wound on the cylindric input high-field electrode and links to each other with the input high-field electrode, the peripheral coiling dielectric of first capacitor plate, the pole plate of second layer electric capacity on reeling on the peripheral dielectric of first capacitor plate; The peripheral coiling dielectric of second capacitor plate, a plurality of electric capacity form a chain type capacitor by above-mentioned coiling by epoxy encapsulation.

The pole plate radial centre lines of said many electric capacity is in same horizontal plane, and the pole plate height of many electric capacity is axially from inside to outside and successively decreases the capacitance equal and opposite in direction of every electric capacity successively.

Said dielectric is a composite polyester film.

Capacitor plate of outermost layer is drawn as earth potential in said a plurality of electric capacity.

Compared with prior art, the utlity model has following advantage: electric capacity adopts winding-structure, and manufacture craft is simple, compact conformation, and volume is little, and is in light weight, and cost is low, and oneself power consumption is less, and power savings is remarkable, adapts to national energy-saving and emission-reduction, environmental protection requirement; Adopt epoxy encapsulation simultaneously, increased the ability of the response environment variation of equipment; Capacitor does not have oiling, does not have the organization plan of gasification, and the insulation of equipment, structural strength are high, no leakage of oil, disappointing potential safety hazard, reliability height; At resistance of arbitrary electric capacity parallel connection; When making circuit short circuit or open circuit fault occur; The energy that is stored in the dividing potential drop electric capacity can come rapid release through this resistance; Thereby realized the quick response tracking of the change in voltage on the transmission line is measured, thoroughly solved " electric charge capture phenomenon ", further improved the precision and the reliability of voltage transformer.

The utility model adopts a plurality of capacitance series of coaxial coiling to become capacitor, have simple in structure, volume is little, low cost of manufacture, the reliability advantages of higher is applicable in the digital transformer substation that voltage measurement and relaying protection use.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is an A place partial enlarged drawing among Fig. 1.

Among the figure: input high-field electrode 1, capacitor 2, electric capacity 3, resistance 4.

Embodiment

Below in conjunction with accompanying drawing the utility model is described further.

Shown in Fig. 1-2, a kind of chain type capacitor comprises input high-field electrode 1, capacitor 2, electric capacity 3, resistance 4.1 input of input high-field electrode connects capacitor 2, and capacitor 2 is composed in series by a plurality of electric capacity 3 successively, and resistance 4 is parallel to arbitrary electric capacity; A plurality of electric capacity 3 are reeled along input high-field electrode 1 axial direction from inside to outside; The pole plate of first electric capacity of internal layer is wound on the cylindric input high-field electrode and links to each other with the input high-field electrode, the peripheral coiling dielectric of first capacitor plate, the pole plate of second layer electric capacity on reeling on the peripheral dielectric of first capacitor plate; The peripheral coiling dielectric of second capacitor plate; Dielectric is a composite polyester film, and a plurality of electric capacity form a chain type capacitor 2 by behind the above-mentioned coiling by epoxy encapsulation, and the pole plate radial centre lines of many electric capacity 3 is in same horizontal plane; The pole plate height of many electric capacity is axially from inside to outside and successively decreases successively; The capacitance equal and opposite in direction of every electric capacity, capacitor plate of outermost layer is drawn as earth potential in a plurality of electric capacity, and the pole plate of outer field penult electric capacity connects outside after the resistance parallel connection.

Claims

1. chain type capacitor; It is characterized in that: said capacitor is composed in series by a plurality of electric capacity successively; A plurality of electric capacity are reeled along input high-field electrode axial direction from inside to outside; The pole plate of first electric capacity of internal layer is wound on the cylindric input high-field electrode and links to each other with the input high-field electrode, the peripheral coiling dielectric of first capacitor plate, the pole plate of second layer electric capacity on reeling on the peripheral dielectric of first capacitor plate; The peripheral coiling dielectric of second capacitor plate, a plurality of electric capacity form a chain type capacitor by above-mentioned coiling by epoxy encapsulation.

2. chain type capacitor according to claim 1 is characterized in that: the pole plate radial centre lines of said many electric capacity is in same horizontal plane, and the pole plate height of many electric capacity is axially from inside to outside and successively decreases the capacitance equal and opposite in direction of every electric capacity successively.

3. chain type capacitor according to claim 1 is characterized in that: said dielectric is a composite polyester film.

4. chain type capacitor according to claim 1 and 2 is characterized in that: capacitor plate of outermost layer is drawn as earth potential in said a plurality of electric capacity.