CN209526512U - A kind of solid combination switch device - Google Patents
A kind of solid combination switch device Download PDFInfo
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- CN209526512U CN209526512U CN201821635414.1U CN201821635414U CN209526512U CN 209526512 U CN209526512 U CN 209526512U CN 201821635414 U CN201821635414 U CN 201821635414U CN 209526512 U CN209526512 U CN 209526512U
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- power supply
- extinguishing arc
- thyristor
- combination switch
- switch device
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Abstract
A kind of solid combination switch device, the combination switch device include: mechanical switch QF, thyristor controlled series compensation, arc suppression transformer and extinguishing arc power supply；The mechanical switch QF is in parallel with the thyristor controlled series compensation again after connecting with the arc suppression transformer high-pressure side；The arc suppression transformer low-pressure side and the extinguishing arc power sources in parallel；The thyristor controlled series compensation is connect with valve base electronic device；The switching command action that the thyristor controlled series compensation, mechanical switch QF and extinguishing arc power supply are issued according to the valve base electronic device respectively；Combination switch device provided by the utility model is suitable for middle press-fitting electricity system, electric arc and overvoltage are not present under arbitrary operational state, and energy loss is small, the needs that frequent operation is switched in electricity consumption are press-fitted in satisfaction, mechanical switch service life is improved, this is of great significance in the industrial production.
Description
Technical field
The utility model relates to the switching devices of middle press-fitting electricity system, and in particular to a kind of solid combination switch device.
Background technique
With the development of the social economy, the electrified extensiveness and intensiveness of social production is increasingly promoted, electricity consumption form presents more
Sample, power quality demand are also increasingly harsh.In big industrial production industry, such as: metallurgy, electric railway, oil exploitation, chemical industry
Production etc. often directly uses the medium voltage distribution network of 10kV, 27.5kV, 35kV voltage class to meet high-power power requirement
Directly it is powered.Therefore, frequent operation inevitably can be carried out to the breaker in medium voltage distribution network under certain operating conditions.
But in high pressure, the operating condition of high current, ablation of the electric arc generated during circuit-breaker switching on-off to contact of breaker can be right
The electrical endurance of breaker causes strong influence.Such as the ground mistake used in heavily loaded electric railway traction power supply system
Split-phase switch, breaker used in the beam pumping unit in oil exploitation device, high-pressure reactive compensation device switching electricity
Container etc., divide-shut brake period are minute grade even second grade, it means that can carry out up to a hundred switch behaviour to breaker daily
Make, and the service life of general breaker is only 10,000 times or so, so as to cause it is above-mentioned using operating condition under the breaker replacement cycle
It is 1~3 month.Breaker replacement so frequent causes great goods and materials loss, while also reducing production efficiency.
For this purpose, mostly using combination switch to substitute traditional switch in above-mentioned application, to extend switch life.Existing 10kV
And the solid-state switch topological form of following voltage class mostly uses thyristor parallel manipulator to switch, which may be implemented no-voltage
It closes a floodgate, reaches Arc-free purpose of closing a floodgate；But in separating brake process, the movement of mechanical switch elder generation separating brake generates electric arc, thyristor according to
The pressure drop generated by electric arc could be connected, and could extinguish shutdown electric arc after realizing electric current transfer.10kV above is answered
Combination switch, to guarantee that thyristor is reliably connected during the opening process, needs to open in machinery since the thyristor number of plies in parallel is more
Close current-limiting reactor in branch.But combination switch it is in the conductive state when, current-limiting reactor accesses always circuit, reactor
Continuing working one side, there are power losses, and on the other hand, pressure drop caused by current-limiting reactor can also cause a fixing to load
It rings.Furthermore combination switch is when off, and the electromagnetic energy stored in current-limiting reactor need to discharge in the loop, and the form of expression is
Overvoltage between reactor end, the frequent switching overvoltage that turns off can damage mechanical switch and thyristor controlled series compensation.
Utility model content
In order to solve the above-mentioned deficiency in the presence of the prior art, the utility model provides a kind of solid combination switch dress
It sets.
Technical solution provided by the utility model is: a kind of solid combination switch device, the combination switch device include:
Mechanical switch QF, thyristor controlled series compensation (1), arc suppression transformer and extinguishing arc power supply；
The mechanical switch QF is in parallel with the thyristor controlled series compensation (1) again after connecting with the arc suppression transformer high-pressure side；
The arc suppression transformer low-pressure side and the extinguishing arc power sources in parallel；
The thyristor controlled series compensation (1) connect with valve base electronic device；
What the thyristor controlled series compensation (1), mechanical switch QF and extinguishing arc power supply were issued according to the valve base electronic device respectively
Switching command action.
Preferably, the thyristor controlled series compensation (1) includes: multiple concatenated thyristor valve TY and high potential control panel；
The multiple concatenated thyristor valve TY is connect by the high potential control panel with the valve base electronic device.It is excellent
Choosing, the input terminal of the extinguishing arc power supply accesses 380V AC power source, works in rectification state；
The output end of the extinguishing arc power supply is connect with the arc suppression transformer low-pressure side, works in inverter mode, according to institute
That states combination switch needs inversion to go out corresponding power frequency ac voltage；
Extinguishing arc power supply uses SVPWM modulation system, and control strategy uses instantaneous power algorithm, right respectively under DQ coordinate system
Control is adjusted in watt current, reactive current.
Preferably, the extinguishing arc power supply includes: two groups of three-phase half-bridge PWM converters being arranged back-to-back and two groups of semiconductors
Switching device；
Two groups of semiconductor switch devices wherein one are mounted on the three-phase half-bridge PWM converter and extinguishing arc electricity
It is another to be mounted between the three-phase half-bridge PWM converter and the output end of the extinguishing arc power supply between the input terminal in source.
Preferably, the semiconductor switch device is IGBT.
Preferably, the number of the thyristor valve TY is at least 20.
Preferably, the high potential control panel is connect with the valve base electronic device by optical fiber.
Compared with the immediate prior art, technical solution provided by the utility model is had the advantages that
(1) a kind of solid combination switch device provided by the utility model, the combination switch device include: mechanical switch
QF, thyristor controlled series compensation, arc suppression transformer and extinguishing arc power supply；After the mechanical switch QF connects with the arc suppression transformer high-pressure side
It is in parallel with the thyristor controlled series compensation again；The arc suppression transformer low-pressure side and the extinguishing arc power sources in parallel；The thyristor controlled series compensation
It is connect with valve base electronic device；The thyristor controlled series compensation, mechanical switch QF and extinguishing arc power supply are set according to the valve-based electronics respectively
The standby switching command action issued；Combination switch device provided by the utility model is suitable for middle press-fitting electricity system, in office
Electric arc and overvoltage are not present under working condition of anticipating, and energy loss is small, are press-fitted in electricity consumption in satisfaction and switch frequent operation
It needs, improves mechanical switch service life, this is of great significance in the industrial production.
(2) combination switch device provided by the utility model all generates without electric arc under any working condition, solves machine
Tool switchs the short problem of the service life as caused by electric arc.
(3) combination switch device provided by the utility model, no overvoltage, over-current shock, protect itself and route its
His element is not damaged.
(4) combination switch device provided by the utility model, wherein without energy-storage travelling wave tubes such as capacity reactances, own switch process
It is not in overvoltage, over-current shock.
(5) combination switch device provided by the utility model, working loss is small, on loaded work piece without influence, opened compound
It closes under device combined floodgate on state, only mechanical switch flows through electric current, and working loss is negligible, and will not cause to load
It influences.
(6) combination switch device provided by the utility model, control mode is flexible, and switch can be adjusted according to load characteristic and be opened
Phase is opened and turned off in pass, makes to load smoothly to throw and move back.
Detailed description of the invention
Fig. 1 is the main circuit topology of the combination switch device of the utility model；
Fig. 2 is the extinguishing arc electric power main circuit topology of the utility model；
Wherein, 1- thyristor controlled series compensation；QF- mechanical switch；TY- thyristor valve；T- arc suppression transformer.
Specific embodiment
The utility model in order to better understand with reference to the accompanying drawing does further in detail the technical solution of the utility model
It describes in detail bright.
As shown in Figure 1 to Figure 2, a kind of solid combination switch device provided in this embodiment, the combination switch device packet
It includes: mechanical switch QF, thyristor controlled series compensation 1, arc suppression transformer T and extinguishing arc power supply；
The mechanical switch QF is in parallel with the thyristor controlled series compensation 1 again after connecting with the high-pressure side the arc suppression transformer T；
The arc suppression transformer T low-pressure side and the extinguishing arc power sources in parallel；
The thyristor controlled series compensation 1 is connect with valve base electronic device；
The thyristor controlled series compensation 1, mechanical switch QF and extinguishing arc power supply are opened according to what the valve base electronic device issued respectively
Combined floodgate command action.
The thyristor controlled series compensation (1) includes: multiple concatenated thyristor valve TY and high potential control panel, high potential control panel
For TE plate；
The multiple concatenated thyristor valve TY is connect by the high potential control panel with the valve base electronic device.It is excellent
Choosing, the input terminal of the extinguishing arc power supply accesses 380V AC power source, works in rectification state；
The output end of the extinguishing arc power supply is connect with the arc suppression transformer low-pressure side, works in inverter mode, according to institute
That states combination switch needs inversion to go out corresponding power frequency ac voltage；
Extinguishing arc power supply uses SVPWM modulation system, and control strategy uses instantaneous power algorithm, right respectively under DQ coordinate system
Control is adjusted in watt current, reactive current.
Preferably, the extinguishing arc power supply includes: two groups of three-phase half-bridge PWM converters being arranged back-to-back and two groups of semiconductors
Switching device；
Two groups of semiconductor switch devices wherein one are mounted on the three-phase half-bridge PWM converter and extinguishing arc electricity
It is another to be mounted between the three-phase half-bridge PWM converter and the output end of the extinguishing arc power supply between the input terminal in source.
Preferably, the semiconductor switch device is IGBT.
Preferably, the number of the thyristor valve TY is at least 20.
Preferably, the high potential control panel is connect with the valve base electronic device by optical fiber.
Based on same purpose of utility model, the utility model also provides a kind of control method of solid combination switch device,
It include: valve base electronic device respectively to sending instructions under thyristor valve TY, mechanical switch QF and extinguishing arc power supply；
Based on the instruction that the valve base electronic device issues, the thyristor valve TY and the extinguishing arc power supply execute the finger
It enables；The mechanical switch QF executes described instruction, completes divide-shut brake movement；
After the mechanical switch QF completes divide-shut brake movement, the valve base electronic device cancel the thyristor valve TY and
The instruction of the extinguishing arc power supply；
Described instruction includes: divide-shut brake instruction/signal.
Preferably, the instruction issued based on the valve base electronic device, the thyristor valve TY and extinguishing arc electricity
Source executes described instruction；The mechanical switch QF executes described instruction, completes divide-shut brake movement, comprising:
When the instruction that the valve base electronic device issues is separating brake instruction/signal:
The thyristor valve TY and the extinguishing arc power supply execute the separating brake instruction/signal, and the pilot thyristor is logical, electricity
Stream passes through thyristor powering load；
After reaching the actuation time of the mechanical switch QF, the mechanical switch QF executes the separating brake instruction/letter
Number, complete separating brake movement.
Preferably, the instruction issued based on the valve base electronic device, the thyristor valve TY and extinguishing arc electricity
Source executes described instruction；The mechanical switch QF executes described instruction, completes divide-shut brake movement, comprising:
When the instruction that the valve base electronic device issues is reclosing command/signal:
The thyristor valve TY and the extinguishing arc power supply execute the reclosing command/signal；
When extinguishing arc power supply is started to work, arc suppression transformer both ends generate voltage, and IGBT group succeeds and begins to flow through
Electric current, while extinguishing arc power detecting load current size, and within a certain period of time by changing output voltage phase and amplitude, it will
The electric current for flowing through mechanical switch is gradually transferred to the branch of thyristor valve side；
When mechanical switch electric current is 0, it is based on the reclosing command/signal, mechanical switch is turned off without electric arc.
Specifically, as shown in Figure 1, combination switch device provided in this embodiment is mainly by mechanical switch QF, thyristor valve
Group TY, arc suppression transformer T, extinguishing arc power supply composition；Thyristor valve TY series connection access circuit, with thyristor controlled series compensation 1, mechanical switch QF
In parallel with thyristor valve TY after connecting with the high-pressure side arc suppression transformer T, extinguishing arc power supply is then in parallel to access arc suppression transformer T low pressure
Side.
As shown in Fig. 2, extinguishing arc power input accesses 380V AC power source, output end accesses arc suppression transformer T low pressure
Side.Extinguishing arc power supply is made of the three-phase half-bridge PWM converter of two groups of back to back structure, and semiconductor switch device uses IGBT, preceding
The current transformer of grade access 380V works in rectification state, by 380V AC rectification at 700V direct current, rear class to arc extinction variable-voltage
The current transformer of device works in inverter mode, needs inversion to go out corresponding power frequency ac voltage according to combination switch.Extinguishing arc power supply
Two-stage current transformer is all made of SVPWM modulation system, and control strategy uses instantaneous power algorithm, respectively to active under DQ coordinate system
Control is adjusted in electric current, reactive current.
Valve base electronic device and high potential control panel are connected between the two by optical fiber and carry out serial communication, realize response triggering
Order, reports the function of thyristor state.
The working principle of combination switch device:
1, making process；It is brilliant lock by switching signal/command analysis after valve base electronic device receives switching signal/order
Pipe trigger signal/order and mechanical switch switching signal/order, and issue simultaneously.Due to IGBT group turn-on time (microsecond
Rank) it is significantly shorter than mechanical switch closing time (millisecond up to a hundred), therefore pilot thyristor is logical, electric current is by thyristor to load
Power supply.Mechanical switch both end voltage is only turn on thyristors pressure drop (tens volts) at this time, be can be neglected, so mechanical switch
It can be considered that no-voltage is closed a floodgate in making process.IGBT group order is withdrawn from after mechanical switch completes feed motion, is completed
Feed motion.
2. separating brake process；After valve base electronic device receives sub-gate signal/order, sub-gate signal is resolved into IGBT group
Signal/order, mechanical switch sub-gate signal/order, extinguishing arc power work signal/order.IGBT group signal is issued first
With extinguishing arc power work signal, thyristor valve is bypassed by mechanical switch at this time, and thyristor valve both end voltage is zero, is unsatisfactory for being connected
Condition.After the start-up operation of extinguishing arc power supply, voltage is generated at arc suppression transformer both ends, this voltage directly acts on thyristor valve two
End, makes it have turn-on condition, IGBT group succeeds and begins to flow through electric current.Extinguishing arc power detecting load current is big simultaneously
It is small, and the electric current for flowing through mechanical switch is gradually transferred to thyristor by changing output voltage phase and amplitude in 10ms
The branch of valve side realizes that electric current shifts completely.After electric current shifts completely, mechanical switch separating brake order is issued, machinery is opened at this time
It closes no current to flow through, voltage also can be considered zero, to realize that mechanical switch is turned off without electric arc.After mechanical switch is fully disconnected,
After revocation IGBT group signal/order and after extinguishing arc power work signal/order, thyristor turns off naturally when electric current is zero
Complete separating brake process.
Conceived based on same utility model, the present embodiment also provides a kind of control method of solid combination switch device, valve
Base electronic equipment issues divide-shut brake order to thyristor valve TY, mechanical switch QF and extinguishing arc power supply respectively；
The mechanical switch QF receives valve base electronic device and issues divide-shut brake order, completes divide-shut brake movement；
After the mechanical switch QF completes divide-shut brake movement, the valve base electronic device cancel the thyristor valve TY and
The order of the extinguishing arc power supply.
The mechanical switch QF receives valve base electronic device and issues divide-shut brake order, completes divide-shut brake movement, comprising:
Received combined floodgate command analysis is that thyristor valve trigger order and mechanical switch QF close a floodgate and order by valve base electronic device
It enables, and is issued to thyristor valve TY and mechanical switch QF simultaneously；After mechanical switch QF completes feed motion, thyristor valve is cancelled
Trigger command completes the feed motion of combination switch device；
Received separating brake command analysis is thyristor valve trigger order, mechanical switch QF combined floodgate order by valve base electronic device
With extinguishing arc power work order, and first by thyristor valve trigger order and extinguishing arc power work order be issued to thyristor valve TY and
Extinguishing arc power supply；After electric current shifts completely, then mechanical switch QF is closed a floodgate to order and is issued to mechanical switch QF；To mechanical switch QF
After completing separating brake movement, thyristor valve trigger order and extinguishing arc power work order are cancelled, the separating brake of combination switch device is completed
Movement.
The above is only the embodiments of the present invention, are not intended to limit the utility model, all in the utility model
Spirit and principle within, any modification, equivalent substitution, improvement and etc. done are all contained in and apply for pending the utility model
Scope of the claims within.
Claims (7)
1. a kind of solid combination switch device, which is characterized in that the combination switch device includes: mechanical switch QF, thyristor
Valve group (1), arc suppression transformer T and extinguishing arc power supply；
The mechanical switch QF is in parallel with the thyristor controlled series compensation (1) again after connecting with the arc suppression transformer high-pressure side；
The arc suppression transformer low-pressure side and the extinguishing arc power sources in parallel；
The thyristor controlled series compensation (1) connect with valve base electronic device；
The folding that the thyristor controlled series compensation (1), mechanical switch QF and extinguishing arc power supply are issued according to the valve base electronic device respectively
Lock command action.
2. combination switch device as described in claim 1, which is characterized in that the thyristor controlled series compensation (1) includes: multiple series connection
Thyristor valve TY and high potential control panel；
The multiple concatenated thyristor valve TY is connect by the high potential control panel with the valve base electronic device.
3. combination switch device as described in claim 1, which is characterized in that
The input terminal of the extinguishing arc power supply accesses 380V AC power source, works in rectification state；
The output end of the extinguishing arc power supply is connect with the arc suppression transformer low-pressure side, works in inverter mode, according to described multiple
Combination switch needs inversion to go out corresponding power frequency ac voltage；
Extinguishing arc power supply uses SVPWM modulation system, and control strategy uses instantaneous power algorithm, respectively to active under DQ coordinate system
Control is adjusted in electric current, reactive current.
4. combination switch device as claimed in claim 3, which is characterized in that
The extinguishing arc power supply includes: two groups of three-phase half-bridge PWM converters being arranged back-to-back and two groups of semiconductor switch devices；
Two groups of semiconductor switch devices wherein one are mounted on the three-phase half-bridge PWM converter and the extinguishing arc power supply
It is another to be mounted between the three-phase half-bridge PWM converter and the output end of the extinguishing arc power supply between input terminal.
5. combination switch device as claimed in claim 4, which is characterized in that
The semiconductor switch device is IGBT.
6. combination switch device as claimed in claim 2, which is characterized in that
The number of the thyristor valve TY is at least 20.
7. combination switch device as claimed in claim 2, which is characterized in that the high potential control panel and the valve-based electronics
Equipment is connected by optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821635414.1U CN209526512U (en) | 2018-10-09 | 2018-10-09 | A kind of solid combination switch device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821635414.1U CN209526512U (en) | 2018-10-09 | 2018-10-09 | A kind of solid combination switch device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209526512U true CN209526512U (en) | 2019-10-22 |
Family
ID=68213190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821635414.1U Expired - Fee Related CN209526512U (en) | 2018-10-09 | 2018-10-09 | A kind of solid combination switch device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209526512U (en) |
-
2018
- 2018-10-09 CN CN201821635414.1U patent/CN209526512U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191022 Termination date: 20211009 |
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| CF01 | Termination of patent right due to non-payment of annual fee |