CN202353205U - Arc extinguishing device of Y-connected reactor - Google Patents

Arc extinguishing device of Y-connected reactor Download PDF

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Publication number
CN202353205U
CN202353205U CN2011201171269U CN201120117126U CN202353205U CN 202353205 U CN202353205 U CN 202353205U CN 2011201171269 U CN2011201171269 U CN 2011201171269U CN 201120117126 U CN201120117126 U CN 201120117126U CN 202353205 U CN202353205 U CN 202353205U
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CN
China
Prior art keywords
reactor
phase
connects
arc extinguishing
extinguishing device
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2011201171269U
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Chinese (zh)
Inventor
黄留欣
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黄留欣
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Filing date
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Priority to CN2011201171269U priority Critical patent/CN202353205U/en
Application granted granted Critical
Publication of CN202353205U publication Critical patent/CN202353205U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses an arc extinguishing device of a Y-connected reactor, which is characterized by consisting of one three-phase dry-type Y-connected adjustable reactor, one regulating capacitor, one single-phase grounding voltage transformer and one microcomputer controller. The electric connection method is that: the arc extinguishing device of the Y-connected reactor is connected to a system by a breaker DL; and a neutral point of the three-phase Y-connected reactor in the arc extinguishing device is grounded by the regulating capacitor. The three-phase dry-type Y-connected adjustable reactor has 3-7 taps; the capacity thereof is adjustable; and the capacity of the regulating capacitor can be determined according to the grounding current and the overvoltage limitation capability of the system. The arc extinguishing device disclosed by the utility model belongs to the field of the small current grounding limitation and overvoltage limitation of the power system; the Y-connected reactor counteracts the ground capacitance current formed in a cable and limits the ground capacitance current in an allowed range (smaller than 5 A); and the overvoltage of the system is limited in the allowed range when single-phase grounding exists. The arc extinguishing device of the Y-connected reactor can be widely used in transformer substations and switching stations in cities using outgoing cables as power supply circuits.

Description

Y connects the reactor arc-control device
Technical field
The utility model discloses a kind of Y and connect the reactor arc-control device; Belong to electric power system restriction grounding surge technical field, be used for small current neutral grounding system restriction grounding surge, with the protection equipment safety operation; But capacitive character is idle in the part compensating cable simultaneously; To stablize 10KV (or 35KV) voltage, avoid capacitive reactive power to fall pushing electric network, can be widely used in city transformer station and switching station.
Background technology
The overvoltage that produces when the 10KV distribution system extensively adopts arc suppression coil to limit small current neutral grounding system generation single-phase earthing at present, extinguish arcs guarantees safe operation.Along with urban distribution network adopts cable as supply line, the 10KV of city transformer station bus direct-to-ground capacitance is more and more big, and the most 10KV of transformer station busbar grounding capacitance currents are more than the 100A, even reaches hundreds of amperes.The arc suppression coil capacity is more and more big, and reliability stability is more and more poor.The arc suppression coil systems technology is complicated, and investment is big, and floor space is big, and does not insert electrical network normal time, just when single-phase earthing takes place, just drops into automatically, can not limit the generation of grounding surge and the foundation of electric arc.Because the existence of cable capacitive reactive power, back burden with power at night reduces in addition, during also corresponding minimizings of perceptual load or burden without work, and the rising of urban distribution network voltage, capacitive reactive power send system, has increased loss, does not also have effective way solution at present.
Summary of the invention
The utility model increases to the capacitive earth current that urban distribution network occurs, and arc current is difficult for extinguishing, back night the capacitive reactive power surplus; Fall pushing electric network, line loss increase and the arc suppression coil capacity big, floor space is big; Move unreliable problem, invented a kind of Y and connect the reactor arc-control device.Utilize Y to connect reactor system capacitive current is limited in allowed band with interior (below the 5A); This Y connects the normal on-line operation of reactor; Rather than just drop into when single-phase earthing taking place as arc suppression coil; Can online restriction ground connection capacity current in service, the rising of normal phase voltage when single-phase earthing takes place in restriction protects little electric current to connect the electrical system safety operation.
The utility model mainly comprises following element:
Y connects reactor; Its capacity is selected by the system cable capacitive earth current; Earthing capacitance current after the counteracting is limited in below the 5A, and the reactor end is provided with 3~7 capacity regulating taps and can have adopted and carry (or a no load switch) and adjust, to adapt to bus charging capacitor change in current.
Adjustment capacitor C T and neutral point voltage instrument transformer, its effect are neutral point and normal phase variations can be according to ground connection the time, the adjustment capacitor volume.Connect by direct ground connection of CT and cable jacket ground connection, realize communicating of Y earthing reactor and cable grounding electric capacity.Ground connection YH moves inclined to one side value to measure neutral point voltage in service, and sends alarm signal.
Microcomputerized controller, connecting system voltage and current signal, Y connect the reactor current voltage signal and judge that through calculating sending instruction carries out earthing wire-selecting, and upload device running status and operational factor to power transformation comprehensive automation device.
Description of drawings
Fig. 1 is the key wiring diagram that Y connects the reactor arc-control device.
Among the figure: I is that Y connects adjustable shunt reactor
II is a regulating capacitor
III is a reactor neutral point voltage instrument transformer
IV is a microcomputerized controller
The element mode of interconnecting is: Y connects the reactor arc-control device and inserts the 10KV of transformer station bus through circuit breaker DL, and the three-phase reactor neutral point is through regulating capacitor ground connection, and the three-phase reactor neutral point also is connected to voltage transformer.
Fig. 2 is that Y connects the external wiring schematic diagram of reactor arc-control device microcomputerized controller.
Embodiment
Further the utility model structure and composition are described below in conjunction with accompanying drawing, like figure, bus and the outlet of 1-n bar are transformer station's existing equipment; Y connects the reactor arc-control device through circuit breaker DL connecting system bus; Y meets the adjustable Y of three-phase in the reactor arc-control device and connects reactor and be provided with 3~7 taps, and the capacity that utilizes K switch to select Y to connect reactor satisfies the system change requirement, and Y connects the reactor neutral point; Be connected to regulating capacitor (II), the direct ground connection of the other end of electric capacity.Y connects the reactor neutral point and also is connected to single-phase potential transformer (III); When ground connection, neutral point voltage is imported microcomputerized controller (IV); Microcomputerized controller carries out processing operations with input signal, when system's generation single-phase earthing, sends line selection signal automatically and uploads comprehensive automation system of transformer substation.

Claims (2)

1.Y connect the reactor arc-control device, its characteristic is that Y connects the reactor arc-control device through circuit breaker DL connecting system bus; The three-phase REgulatable reactor (I) of arc-control device is provided with 3~7 taps, utilizes K switch to select the capacity of reactor to satisfy system requirements; Y connects the reactor neutral point and is connected to regulating capacitor (II), the direct ground connection of the capacitor other end; Y connects the reactor neutral point and also is connected to single-phase potential transformer (III), when system earth, neutral point voltage is imported microcomputerized controller (IV), and microcomputerized controller is handled signal, sends signal automatically, and is uploaded to comprehensive automation system of transformer substation.
2. Y according to claim 1 connects the three-phase REgulatable reactor (I) in the reactor arc-control device, and it has 3~7 capacity regulating taps; By-pass cock K can be an on-load voltage regulating switch, also can be no excitatory switch; The reactor capacity is regulated with the cable length or the earthing capacitance current of transformer station; Reactor adopts iron core in the formula structure; The mode of connection is that Y connects; Neutral point is directly drawn through regulating capacitor ground connection.
CN2011201171269U 2011-04-20 2011-04-20 Arc extinguishing device of Y-connected reactor Expired - Fee Related CN202353205U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011201171269U CN202353205U (en) 2011-04-20 2011-04-20 Arc extinguishing device of Y-connected reactor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011201171269U CN202353205U (en) 2011-04-20 2011-04-20 Arc extinguishing device of Y-connected reactor

Publications (1)

Publication Number Publication Date
CN202353205U true CN202353205U (en) 2012-07-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011201171269U Expired - Fee Related CN202353205U (en) 2011-04-20 2011-04-20 Arc extinguishing device of Y-connected reactor

Country Status (1)

Country Link
CN (1) CN202353205U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3605768A4 (en) * 2017-07-06 2020-12-30 Changsha University of Science and Technology Safe processing method for active voltage reduction of ground fault phase of non-effective grounding system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3605768A4 (en) * 2017-07-06 2020-12-30 Changsha University of Science and Technology Safe processing method for active voltage reduction of ground fault phase of non-effective grounding system

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
EE01 Entry into force of recordation of patent licensing contract

Assignee: Zhuhai Lanruimeng Electric Co., Ltd.

Assignor: Huang Liuxin

Contract record no.: 2014440000396

Denomination of utility model: Arc extinguishing device of Y-connected reactor

Granted publication date: 20120725

License type: Exclusive License

Record date: 20140820

LICC Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model
EC01 Cancellation of recordation of patent licensing contract

Assignee: Zhuhai Lanruimeng Electric Co., Ltd.

Assignor: Huang Liuxin

Contract record no.: 2014440000396

Date of cancellation: 20150415

LICC Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120725

Termination date: 20150420

EXPY Termination of patent right or utility model