CN207082434U - A kind of protective relaying device of dry-type high-voltage self-healing type parallel condenser - Google Patents
A kind of protective relaying device of dry-type high-voltage self-healing type parallel condenser Download PDFInfo
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- CN207082434U CN207082434U CN201720962635.9U CN201720962635U CN207082434U CN 207082434 U CN207082434 U CN 207082434U CN 201720962635 U CN201720962635 U CN 201720962635U CN 207082434 U CN207082434 U CN 207082434U
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- transformer
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- voltage
- healing
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Abstract
The utility model discloses a kind of protective relaying device of dry-type high-voltage self-healing type parallel condenser; protection device is mainly made up of pressure sensor, compound transformer and Relay Protection Unit; pressure sensor is arranged on the top cover of each capacitor unit shell; compound transformer is arranged on the stand of capacitor unit; compound transformer is made up of the encapsulation of voltage transformer, current transformer, resistance, input terminal 1, input terminal 2, lead-out terminal and resin insulating barrier, and lead-out terminal is connected with Relay Protection Unit.The utility model solves the problems, such as high pressure self healing capacitor internal fault relay protection, is effectively prevented from the generation of accident.The utility model is simple, easy to install, can meet capacitor indoors long-term safety under external environment condition, stably, the requirement of reliably working.
Description
Technical field
The utility model belongs to power capacitor protection field, and in particular to one kind is based on high pressure self-healing type parallel condenser
The protective relaying device of the pressure protection of group.
Background technology
Up to the present, the high-voltage parallel capacitor for being successfully applied to power system is all oil immersion, and its solid dielectric is adopted
With polypropylene film, pole plate is aluminium foil, referred to as " oil immersion foil type capacitor ".Its feature is：Capacitor individual capacity is big, active damage
Consume small, caloric value is low, stable.Shortcoming is to be full of insulating oil in case shell, once internal generation catastrophe failure trigger box shell is quick-fried
Split, hold fire hazardous, cause a serious accident, this accident is not rarely seen, it is seen that safety in operation is always this capacitor
Existing hidden danger.The defect limits indoor change of this kind of capacitor in important events such as Urban Underground transformer station, heavy construction
Power station and the application in emphasis fire prevention place.
Oil-free in dry-type high-voltage self-healing type parallel condenser case shell, by its self-healing feature, can prevent medium weakness and
Harm that shelf depreciation is brought and reliably run, be adapted for mount to Urban Underground transformer station, the indoor substation of heavy construction
And emphasis fire prevention place.
Self-healing performance of this kind of capacitor due to that must take the dielectric breakdown point under high field intensity into account, pretends the metal-plated for pole plate
Layer is very thin.When this kind of capacitor because operating ambient temperature is higher, or often bear overvoltage and high current so that medium accelerates
Aging, can not self-healing when element may be punctured by large area, breakdown position medium under arcing, produce a large amount of gas
Body, capacitor internal pressure is increased dramatically, often result in shell bulge, or even cause explosion, other equipment may be caused
Harm.Therefore, the internal fault protection of dry-type high-voltage self-healing type parallel condenser is for ensureing that equipment safety operation has important meaning
Justice.
At present, high voltage oil immersion foil type capacitor group is commonly used error protection and had：Internal fuse or fuses for external protection protection plus after
Electric protection.Due to having multiple element connection in series-parallel inside dry-type high-voltage self-healing type parallel condenser, its distinctive self-healing performance causes
Component breakdown Dian Hu roads resistance is generally bigger, there is tens of Ohms or hundreds of ohms, so the electric capacity and electricity that reflect during failure
Rheologyization is not notable, and the conventional guard method of high voltage oil immersion foil type capacitor group is not all suitable for dry-type high-voltage self-healing electricity in parallel
Container group.
The method that low pressure self healing capacitor used in 1kV or following voltage class power systems often uses pressure protection.
Its operation principle produces gas when being capacitor internal failure, causes capacitor internal air pressure to increase so that capacitor case becomes
Shape breaks internal current connection sheet, so as to cut off the electricity supply, makes capacitor out of service.But high-voltage parallel capacitor is applied to
6kV, 10kV, 35kV voltage class, if internal by the way of electric current connection sheet is broken, the insulation distance and its fracture of fracture
Shape can not meet the requirement of isolated high voltage, between fracture can resume combustion, what caused high power overvoltage can be in harm system is electric
Equipment.Therefore, this tension fracture type protection device does not apply in high pressure self-healing type parallel condenser.
In summary, the particularity of dry-type high-voltage self-healing type parallel condenser material, structure and operation principle is limited by, its
In addition to the self-healing performance that itself has, the relay protection of current this kind of capacitor is safe operation needs for the protection of internal fault
The key technology of solution.
The content of the invention
For the requirement of power system shunt capacitor internal fault relay protection, the utility model proposes protected based on pressure
A kind of dry-type high-voltage self-healing type parallel condenser of shield（Hereinafter referred to as " capacitor "）Protective relaying device.
Technical scheme is as follows used by the utility model.
The utility model provides a kind of protective relaying device of capacitor, and protection device is mainly by pressure sensor, compound
Transformer and Relay Protection Unit composition, pressure sensor are arranged on the top cover of each capacitor unit shell, compound transformer
On the stand of capacitor unit, compound transformer is by voltage transformer (VT), current transformer (CT), resistance (R), defeated
Enter terminal 1, input terminal 2, lead-out terminal and resin insulating barrier encapsulation to form, input terminal 1 and voltage transformer first winding
It is connected, input terminal 1 and the first and last end of capacitor unit group are connected in parallel, and the pressure of input terminal 2 and each capacitor unit passes
Sensor is connected in parallel, and input terminal 2, resistance, secondary windings of PT are connected with current transformer first winding, output end
Son is connected with the secondary winding of current transformer, and lead-out terminal is connected with Relay Protection Unit.
Preferentially, protection device is to be based on pressure protection.
Preferentially, pressure sensor is by coupling part, pressure-operated mechanism, pressure regulating mechanism, output switch contact, guarantor
Shield, output switch contact are a pair of normally opened contacts.
Preferentially, Relay Protection Unit is mainly current protective relay or capacitor integrated protection instrument.
Preferentially, what the insulation of pressure sensor and compound transformer met power system and capacitor bank dielectric level will
Ask.
The beneficial effects of the utility model are：According to the material of dry-type high-voltage self-healing type parallel condenser, structure and characteristic,
Using the method for pressure sensor, compound transformer and Relay Protection Unit combination and its device of formation, can solve self-healing
Capacitor internal failure relay protection problem, is effectively prevented from the generation of accident.
The utility model is simple in construction, easy to install, can meet that capacitor is long-term under external environment condition indoors
Safe and stable, reliably working requirement.
Brief description of the drawings
Fig. 1 is the schematic diagram that the utility model implements dry-type high-voltage self-healing type parallel condenser group.
Fig. 2 is pressure sensor transformer structural representation of the present utility model.
Fig. 3 is compound transformer structural representation of the present utility model.
In figure, 1- capacitor units；2-pressure sensor；The compound transformers of 3-；4- stands；5- support insulators；6
- Relay Protection Unit.
21-coupling part；22- pressure-operateds mechanism；23-pressure regulating mechanism；24- output switchs contact；25- is protected
Shield；31-input terminal 1；32- input terminals 2；33-lead-out terminal；34- voltage transformers VT；35- current transformers
CT；36- resistance R；37- resin insulating barriers.
Embodiment
The utility model is further described below in conjunction with the drawings and specific embodiments.
It is visible in Fig. 1：The object of protection is dry-type high-voltage self-healing type parallel condenser unit (1), protective relaying device
Main body is made up of pressure sensor (2), compound transformer (3) and Relay Protection Unit (6).
Pressure sensor (2) is arranged on the top cover of each capacitor unit (1) shell.
Each capacitor unit (1) and compound transformer (3) are arranged on stand (4), and stand (4) is by support insulator (5)
Support, form insulation stand.Each capacitor unit (1) carries out wiring, the input terminal 1 of compound transformer (3) by service requirement
(31) both ends with capacitor (1) group are connected in parallel, and it is rated capacitor phase voltage to make its working voltage.Compound transformer (3)
Input terminal 2 (32) drive sensor (2) with pressure and be connected.
Relay Protection Unit (6) is connected with the lead-out terminal (33) of compound transformer (3).Relay Protection Unit (6) exports
Tripping operation, alarm signal.
Visible in fig. 2, pressure sensor (2) is by coupling part (21), pressure-operated mechanism (22), pressure regulating mechanism
(23), output switch contact (24), protective cover (25).Output switch contact (24) is a pair of normally opened contacts, with compound transformer
(3) input terminal 2 (32) is connected.
In figure 3 it can be seen that compound transformer (3) is by input terminal 1 (31), input terminal 2 (32)；Lead-out terminal
(33), voltage transformer VT (34), Current Transmit (35) and resistance R (36) and resin insulating barrier (37) encapsulation are formed.
Input terminal 1 (31) is connected with voltage transformer (34) first winding, input terminal 2 (32), resistance (36), voltage transformer
(34) secondary winding is connected with current transformer (35) first winding, lead-out terminal (33) and current transformer (35) it is secondary around
Group is connected.
Specifically, during capacitor internal failure, after pressure reaches certain setting value, pressure sensor (2), which acts, causes it
Middle output switch contact (24) is changed into closing from normally opened, while Current Transmit (35) sensing of compound transformer has electric current,
Lead-out terminal (33) has current signal output simultaneously, now, is broken down inside illustrated capacitor unit (1), by relay protection
Unit (6) sends alarm and trip signal, operating breaker disconnect the power supply of faulty capacitor group in time, avoids the hair of accident
It is raw.
It is described above, the only preferable embodiment of the utility model, but the scope of protection of the utility model is not
This is confined to, any one skilled in the art can readily occur in the technical scope that the utility model discloses
Change or replacement, should all cover within the scope of protection of the utility model.Therefore, the scope of protection of the utility model should
It is defined by scope of the claims.
Claims (3)
1. a kind of protective relaying device of dry-type high-voltage self-healing type parallel condenser, the protection device are characterised by：Protection
Device is mainly made up of pressure sensor, compound transformer and Relay Protection Unit, and pressure sensor is arranged on each capacitor list
On the top cover of first shell, compound transformer be arranged on capacitor unit stand on, compound transformer by voltage transformer (VT),
Current transformer (CT), resistance (R), input terminal 1, input terminal 2, lead-out terminal and resin insulating barrier encapsulation are formed, input
Terminal 1 is connected with voltage transformer first winding, and input terminal 1 and the first and last end of capacitor unit group are connected in parallel, input
The pressure sensor of son 2 and each capacitor unit is connected in parallel, input terminal 2, resistance, secondary windings of PT and electric current
Transformer first winding is connected, and lead-out terminal is connected with the secondary winding of current transformer, lead-out terminal and Relay Protection Unit
It is connected.
2. the protective relaying device of dry-type high-voltage self-healing type parallel condenser according to claim 1, it is characterised in that：Institute
Pressure sensor is stated by coupling part, pressure-operated mechanism, pressure regulating mechanism, output switch contact, protective cover, the output
Switch contact is a pair of normally opened contacts.
3. the protective relaying device of dry-type high-voltage self-healing type parallel condenser according to claim 1, it is characterised in that：Institute
It is current protection unit to state Relay Protection Unit, and main composition is that current protective relay and capacitor integrated protect instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720962635.9U CN207082434U (en) | 2017-08-03 | 2017-08-03 | A kind of protective relaying device of dry-type high-voltage self-healing type parallel condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720962635.9U CN207082434U (en) | 2017-08-03 | 2017-08-03 | A kind of protective relaying device of dry-type high-voltage self-healing type parallel condenser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207082434U true CN207082434U (en) | 2018-03-09 |
Family
ID=61424839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720962635.9U Withdrawn - After Issue CN207082434U (en) | 2017-08-03 | 2017-08-03 | A kind of protective relaying device of dry-type high-voltage self-healing type parallel condenser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207082434U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107464692A (en) * | 2017-08-03 | 2017-12-12 | 无锡市电力滤波有限公司 | A kind of protective relaying device and its method of dry-type high-voltage self-healing type parallel condenser |
-
2017
- 2017-08-03 CN CN201720962635.9U patent/CN207082434U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107464692A (en) * | 2017-08-03 | 2017-12-12 | 无锡市电力滤波有限公司 | A kind of protective relaying device and its method of dry-type high-voltage self-healing type parallel condenser |
| CN107464692B (en) * | 2017-08-03 | 2023-01-17 | 无锡市电力滤波有限公司 | Relay protection device and method for dry-type high-voltage self-healing parallel capacitor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180309 Effective date of abandoning: 20230117 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20180309 Effective date of abandoning: 20230117 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |