CN208368418U - A kind of manifold type high voltage DC breaker - Google Patents
A kind of manifold type high voltage DC breaker Download PDFInfo
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- CN208368418U CN208368418U CN201821048543.0U CN201821048543U CN208368418U CN 208368418 U CN208368418 U CN 208368418U CN 201821048543 U CN201821048543 U CN 201821048543U CN 208368418 U CN208368418 U CN 208368418U
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Abstract
The utility model provides a kind of manifold type high voltage DC breaker, comprising: main loop unit, charging convertor unit, energy consumption unit, trigger unit and energy-absorbing compression limiter；Energy-absorbing compression limiter is connected in parallel with main loop unit, and charging convertor unit is connected in parallel with main loop unit；Trigger unit after system jam for triggering the charging convertor unit and triggering the energy consumption unit when reclosing；Convertor unit charge for generating the electric current of the higher-order of oscillation when a failure occurs it, reversely be superimposed to form zero crossing and cut-off fault current with fault current, and failure on-off after reclosing is used for recharged capacitance charging after cut-offfing for the first time；Energy-absorbing compression limiter absorbs the energy of energy storage in electric system inductive element, the voltage of limit mechanical switch ends after cut-offfing；Energy consumption unit is for consuming the energy of commutation capacitor when dc circuit breaker reclosing to make the switching current on mechanical switch rapidly decay to zero.
Description
Technical field
The utility model belongs to high voltage DC breaker field, more particularly, to a kind of with the novel of mutual reactor
Mechanical high-voltage dc circuit breaker.
Background technique
In recent years, with the continuous fast development increased with renewable energy to energy demand, D.C. high voltage transmission exists
It attracts wide attention both at home and abroad.Since direct current transportation has conveying energy big, conveying distance is remote, the advantages that small is lost, therefore
At home and abroad large-scale application has been obtained in power grid.Traditional DC transmission engineering is mostly two end systems, be only able to achieve two o'clock it
Between energy transmission, when using direct current transportation between multiple load center power transmissions or multiple AC systems use direct current interconnect when,
Need to build a plurality of DC power transmission line, this will greatly increase cost of investment and operating cost.And multi-terminal direct current transmission system
The economical advantage and technological merit for sufficiently developing high voltage dc transmission technology are a kind of technology of transmission of electricitys of more attractive, full
The development need of sufficient China's power industry.Other than having the advantages of two-terminal DC transmission system, there are also can be achieved for multi-terminal HVDC transmission
Multiple feed, more drop points are by electricity；It is reliable higher, it is more flexible；It can be with built by separate periods, the advantages that increasing investment returns.
Due to the DC side impedance very little of multi-terminal HVDC transmission net, when short trouble occurs for DC side, fault current meeting
Rapid increase will lead to change of current top-cross stream breaker actuation, change of current valve group is closed if not cutting off failure in time in a short time
Lock, influences the normal operation of whole system.And high voltage DC breaker can quickly cut off fault current and isolation in a short time
Fault point guarantees the normal operation of system.Therefore, the key that high voltage DC breaker constructs reliable multiterminal flexible direct current power grid is set
It is one of standby.
Currently, both at home and abroad main dc circuit breaker be classified as mechanical dc circuit breaker, hybrid dc circuit breaker and
All solid state formula dc circuit breaker.All solid state formula high voltage DC breaker is mainly made of power electronic devices, is applied to high straightening
When galvanic electricity net, Tandem devices number excessively leads to that control unit is complicated, involve great expense, on-state loss is big, therefore high straightening at present
The development emphasis of breaker is flowed based on mechanical high-voltage dc circuit breaker and hybrid high voltage DC breaker, and for mixing
Formula high voltage DC breaker, it is at high cost, on-state loss is big since its through-flow, pressure-resistant element is power electronics solid-state switch, to control
System requires also very stringent；And tradition machinery formula high voltage DC breaker, it is change of current branch way control switch according to smash gap,
Electric spark when conducting can constitute a threat to oil-insulation equipment around, according to thyristor as change of current branch way control switch,
Thyristor need to be resistant to higher recovery voltage in interrupting process, and cost also can be higher.
Utility model content
Aiming at the above defects or improvement requirements of the prior art, it is disconnected to provide a kind of manifold type high voltage direct current for the utility model
Road device is meeting direct current system and is being swift in motion to high voltage DC breaker itself, cut-offfing high current, low current and bear high voltage
On the basis of, solve the problems, such as that existing high voltage DC breaker is at high cost, thyristor withstanding voltage is high；For coupled mode height
Dc circuit breaker is pressed, line current will be transferred to change of current branch after cut-offfing, low current afterflow is led to the problem of, and this is practical
Manifold type high voltage DC breaker in novel can be good at solving the problems, such as this, while the manifold type high voltage direct current proposed is disconnected
Road device has the function of that two-way reclosing is cut-off, and can meet the needs of different direct current systems.
The utility model provides a kind of manifold type high voltage DC breaker, comprising: main loop unit, charging change of current list
Member, energy consumption unit, trigger unit and energy-absorbing compression limiter；Main loop unit accesses in direct current system for connecting, the energy-absorbing
Compression limiter is connected in parallel with main loop unit, and the charging convertor unit is connected in parallel with the main loop unit；The touching
First output end of bill member is connect with the charging convertor unit, and the second output terminal and energy consumption unit of the trigger unit connect
It connects, the trigger unit is used to trigger the charging convertor unit after system jam, and institute is triggered when reclosing
State energy consumption unit；The charging convertor unit is reversed with fault current for generating the electric current of the higher-order of oscillation when a failure occurs it
Superposition forms zero crossing and cut-offs fault current, and is opened for failure after reclosing after cut-offfing for the first time recharged capacitance charging
It is disconnected；The energy-absorbing compression limiter after cut-offfing for absorbing the energy of energy storage in electric system inductive element, limit mechanical
The voltage of switch ends；The energy consumption unit is also connect with the charging convertor unit, and the energy consumption unit is used for when direct current is disconnected
The energy of commutation capacitor is consumed when combined floodgate is thought highly of on road to make the switching current on mechanical switch rapidly decay to zero.
Further, the main loop unit be can arcing and in current over-zero can blow-out mechanical switch.
Further, the charging convertor unit include: recharged capacitance C11, thyristor SCR1, storage capacitor C12,
Charging resistor R1, mutual reactor, commutation capacitor C2, mechanical switch CB2 and arrester MOV2；The recharged capacitance C11's
One end is connect with one end of the mutual reactor primary side L1, the other end and the thyristor of the recharged capacitance C11
One end of SCR1 connects；The other end of the thyristor SCR1 is connect with the other end of the mutual reactor primary side L1, described
Storage capacitor C12 is in parallel with the recharged capacitance C11 after connecting with the charging resistor R1；One end of the commutation capacitor C2
It is connect with one end of mutual reactor pair side L2, the other end of the commutation capacitor C2 is connected to the mechanical switch CB2
One end, the arrester MOV2 is in parallel with the mechanical switch CB2, the other end of mutual reactor pair side L2 and described
The other end of mechanical switch CB2 is respectively connected to the both ends of the main loop unit.
Further, the energy consumption unit includes: the energy consumption resistor R2 and thyristor SCR2 of series connection, energy consumption resistor
The non-series connection end of R2 is grounded, the non-series connection end of thyristor SCR2 respectively with the charging convertor unit and the triggering
Unit connection.
Further, the energy-absorbing compression limiter includes: Zinc-Oxide Arrester, and both ends are connected to the master and return
The both ends of road unit.
Wherein, when the systems are operating normally, mechanical switch CB is closed, and system power is negative by mechanical switch CB flow direction
It carries, on-state loss is smaller；When short trouble occurs for system, due to it is used cut-off unit and only have current over-zero cut-off
Ability, therefore when cut-offfing fault current, the mechanical switch CB contact is opened and arcing, in the contact of the mechanical switch CB
It opens and opens away from after being resistant to the recovery voltage after cut-offfing, the trigger unit triggers the thyristor SCR1, leads away from reaching specified
Lead to the charging convertor unit, the recharged capacitance C11 and the mutual reactor primary inductor L 1 vibrate, and pass through the coupling
Closing reactor makes the mutual reactor secondary inductance L2 and commutation capacitor C2 generate reversing oscillating current, and oscillating current
Amplitude is more than system maximum fault current amplitude, to make the mechanical switch CB generation zero crossing blow-out, cut-offs fault current；
After the mechanical switch CB zero passage blow-out, line current is transferred to the mutual reactor secondary inductance L2 and change of current electricity
Hold C2 change of current branch in series, so that the voltage of the commutation capacitor C2 is gradually increasing, and is applied to the mechanical switch
The both ends CB, when voltage magnitude rises to the operation voltage of the energy-absorbing compression limiter, the lightning-arrest movement of the energy-absorbing compression limiter,
Perceptual energy in absorption circuit, to the mechanical switch voltage-limiting protection, while line current is begun to decline.
If line fault is ground fault, fault current amplitudes are larger, then line current passes through the coupling after cut-offfing
Reactor secondary inductance L2, commutation capacitor C2 oscillation, the rate of decay are slower；If line fault is high resistance grounding failure, failure
Current amplitude is smaller, then change of current branch is in overdamping state after cut-offfing, and has during line current decline one longer
Hangover, this will be difficult to meet system requirements.Therefore end is being cut-off, when line current is dropped near zero, the triggering is single
Member triggers the thyristor SCR1 again, so that change of current branch is generated oscillating current, so that the mechanical switch CB2 is in zero crossing
When disconnect change of current branch current, and the arrester MOV2 plays the role of the limitation mechanical switch CB2 both end voltage.
After cut-offfing for the first time, the voltage at the both ends the recharged capacitance C11 has more decaying, the energy storage electricity
Hold C12 to charge by the charging resistor R1 to the recharged capacitance, can meet and cut-off for the second time.
Since after cut-offfing for the first time, the commutation capacitor C2 voltage is consistent with system voltage, the change of current of when reclosing
Capacitor C2 and mutual reactor pair side L2 oscillation generates frequency and the higher oscillating current of amplitude, and event is cut-off in influence for the second time
Hinder electric current；Therefore, when carrying out reclosing operation, the thyristor SCR2 is first turned on, makes to generate on the mechanical switch
High frequency oscillating current is discharged by the energy consumption resistor R2, so that the mechanical switch electric current rapidly decays to zero.
The utility model has the advantage that
(1) IGBT group unit is used, no arc triggering does not constitute a threat to oil-insulation equipment around, ensured system
Operational safety；Thyristor is placed in low-pressure side simultaneously, significantly reduces the voltage class of trigger unit and the difficulty of drive control
Degree；Recharged capacitance C11 is located at low-pressure side, and pre-charge voltage grade is lower, over the ground naked requirement, thus to live part
The resistance to pressure request that insulate is lower, and solves the problems, such as high potential, the charging of more current potentials；High-pressure side commutation capacitor C2 is operating normally shape
It is not charged under state, the demand without long-term through-flow pressure resistance, therefore the cost of capacitor and volume is made to have larger reduction, it improves it and opens
Disconnected reliability, reduces the cost of dc circuit breaker.
(2) the utility model mesohigh dc circuit breaker change of current branch connect change of current branch mechanical switch, and its two
Hold lightning arrester connected in parallel.Traditional coupled mode machinery dc circuit breaker is compared, which can trigger brilliant lock after cut-offfing end again
Pipe makes change of current branch mechanical switch generate zero crossing makes line current rapidly decay to zero to cut-off change of current branch current.Together
When, by limiting its both end voltage, further decreasing its cost in change of current branch mechanical switch both ends lightning arrester connected in parallel.
(3) the manifold type high-voltage direct-current breaker topology can by mutual reactor primary side both ends parallel connection energy consumption resistor
To make the electric current on mechanical switch rapidly decay to zero in reclosing, avoid being overlapped brake current to cut-off for the second time cause it is negative
It influences.
(4) in recharged capacitance both ends parallel connection storage capacitor, and serial connection charge resistance controls the charging time.When the topology is answered
When occasion higher for voltage class, more energy can be lost by cut-offfing rear recharged capacitance for the first time, and in the desired time
Interior to charge according to transformer to recharged capacitance, then require the power of transformer very big when being cut-off for the second time, this is to setting
Standby safety proposes higher requirement.And by recharged capacitance both ends parallel connection storage capacitor, it is ensured that safe, fast
Required value is charged to fastly, and completion is cut-off for the second time.
Detailed description of the invention
Fig. 1 is a kind of functional block diagram of manifold type high voltage DC breaker provided by the utility model；
Fig. 2 is a kind of specific block diagram of manifold type high voltage DC breaker provided by the utility model；
Fig. 3 is waveform when manifold type high voltage DC breaker reclosing provided by the utility model cut-offs fault current
Figure；
Fig. 4 is waveform diagram when manifold type high voltage DC breaker provided by the utility model cut-offs low current；
Fig. 5 is recharged capacitance in manifold type high voltage DC breaker reclosing interrupting process provided by the utility model
Voltage oscillogram.
Wherein, 1 is main loop unit, and 2 be charging convertor unit, and 3 be energy consumption unit, and 4 be trigger unit, and 5 limit for energy-absorbing
Press unit；CB is mechanical switch, and C11 is recharged capacitance, and C12 is storage capacitor, and R1 is charging resistor, and SCR1, SCR2 are can
Thyristor is triggered, L1 is mutual reactor primary side, and L2 is mutual reactor pair side, and C2 is commutation circuit capacitor, and CB2 is change of current branch
Road mechanical switch, MOV1, MOV2 are arrester.X-axis is time t, unit s in Fig. 3, Fig. 4；Y-axis is current amplitude, unit kA；
Dotted line represents mechanical switch CB fracture electric current, and solid line represents line current.X-axis is time t, unit s in Fig. 5；Y-axis is voltage amplitude
Value, unit kV；Solid line represents the voltage of recharged capacitance C11, and dotted line represents the voltage of storage capacitor C12.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.In addition, institute in the various embodiments of the present invention described below
The technical characteristic being related to can be combined with each other as long as they do not conflict with each other.
The purpose of the utility model is to provide a kind of manifold type high voltage DC breakers, are meeting direct current system to high straightening
On the basis of stream breaker itself is swift in motion, cut-offs high current and bear high voltage, brilliant lock will be triggered by mutual reactor
Pipe, recharged capacitance are placed in low-pressure side, reduce equipment cost, improve the reliability cut-off.Meanwhile the utility model also has
The function of thering is two-way reclosing to cut-off, and after cut-offfing limit line current amplitude, meet the needs of not homologous ray.
Fig. 1 is a kind of functional block diagram of manifold type high voltage DC breaker provided by the utility model, and Fig. 2 is that this is practical new
A kind of specific block diagram for manifold type high voltage DC breaker that type provides.Manifold type high voltage direct current provided by the utility model
Breaker includes: main loop unit 1, charging convertor unit 2, energy consumption unit 3, trigger unit 4 and energy-absorbing compression limiter 5；Wherein,
In the series connection access direct current system of main loop unit 1, charging convertor unit 2 and energy-absorbing compression limiter 5 are in parallel with main loop unit 1,
Trigger unit 4 is in parallel with charging convertor unit 2 and energy consumption unit 3 respectively；Wherein, main loop unit 1 is mechanical switch CB, mechanical
Switch CB be can arcing and current zero-crossing point can blow-out cut-off.The convertor unit 2 that charges includes recharged capacitance C11, energy storage
Capacitor C12, it charging resistor R1, thyristor SCR1, mutual reactor, commutation capacitor C2, change of current branch mechanical switch CB2, takes shelter from the thunder
Device MOV2, wherein recharged capacitance C11, thyristor SCR1 and mutual reactor primary inductor L 1 are connected in series, storage capacitor C12
Connect with charging resistor R1, the two is connected in parallel on the both ends recharged capacitance C11, for after cut-offfing for the first time to recharged capacitance C11
Charging；Commutation capacitor C2 connects with mutual reactor pair side L2, change of current branch mechanical switch CB2, and arrester MOV2, which is connected in parallel on, to be changed
The both ends branch mechanical switch CB2 are flowed, its both end voltage is limited.The unit 3 that consumes energy includes thyristor SCR2 and energy consumption resistor R2, the two
It is connected in series with mutual reactor primary inductor L 1, the energy of commutation capacitor is consumed when for dc circuit breaker reclosing to make
Switching current on mechanical switch rapidly decays to zero.The output end and charging convertor unit 2 and energy consumption unit 3 of trigger unit 4
Control terminal connection, when electric system break down when, trigger unit 4 for generate trigger signal make charge convertor unit 2 touch
Hair turns on and generates oscillating current and is superimposed generation zero crossing with fault current；In reclosing, the triggering energy consumption unit of trigger unit 4
3 make energy consumption unit 3 absorb energy and accelerate the rate of decay of mechanical switch electric current.Energy-absorbing compression limiter 5 is Zinc-Oxide Arrester,
For limiting the voltage at the both ends main loop unit mechanical switch CB.
In the example of the utility model, the major function of main loop unit 1 is to be opened by mechanical switch CB in current zero-crossing point
Disconnected fault current；The major function of charging convertor unit 2 has at 3 points: 1. recharged capacitance C11 and mutual reactor L1 generates high
Frequency oscillating current generates oscillating current in change of current branch by mutual reactor, is superimposed upon on mechanical switch CB, manually manufactured
Zero point cut-offs mechanical switch CB；2. thyristor SCR1 is triggered again when cut-offfing end, line current dropping near zero,
Change of current branch is set to generate oscillating current, change of current branch mechanical switch CB2 is disconnected, to cut-off change of current branch current, makes line electricity
Stream drops quickly to zero；3. storage capacitor C12 is filled by charging resistor R1 to recharged capacitance C11 after cut-offfing for the first time
Electricity makes its voltage satisfaction cut-off demand for the second time；The effect of energy consumption unit 3 is, in reclosing operation, consumes commutation capacitor C2
In energy, so that switching current is rapidly decayed to zero, avoid the influence to second of interrupting process；The master of energy-absorbing compression limiter 5
Wanting function is realized to mechanical switch for absorbing the energy of inductive element storage in direct current system after fault current is cut off
The voltage-limiting protection of CB；The major function of trigger unit 4 is turned it on for triggering charging convertor unit after the system failure, in weight
Triggering energy consumption unit absorbs energy when combined floodgate.
For further description manifold type high voltage DC breaker provided by the embodiment of the utility model, it is now described in detail
The course of work is as follows:
When system worked well, mechanical switch CB is in "on" position, and system power is loaded by mechanical switch CB flow direction,
On-state loss is smaller.
When system jam, since the used unit that cut-offs is that unit is cut-off in mature exchange, only has electric current
Zero passage connecting-disconnecting function, therefore when cut-offfing fault current, the contact of mechanical switch CB separates and arcing.
Reach specified in the contact of mechanical switch CB to open away from rear, trigger unit issues signal, touches primary side thyristor SCR1
Hair conducting, recharged capacitance C11 and mutual reactor primary side L1 generate high frequency oscillating current, thus mutual reactor pair side L2 with
Commutation capacitor C2 can also generate the electric current of a higher-order of oscillation, and amplitude is more than system failure current amplitude.This electric current and failure
Electric current superposition, makes mechanical switch CB generate zero crossing, is mechanical switch CB blow-out and cut-offs fault current.It is put out in mechanical switch CB
After arc, line current is transferred to the change of current branch that mutual reactor pair side L2 and commutation capacitor C2 is constituted, and commutation capacitor C2's is extensive
Complex voltage is gradually increasing, when recovery voltage magnitude reaches the operation voltage of energy-absorbing compression limiter arrester, energy-absorbing compression limiter
Arrester MOV1 is acted, the energy of inductive element in absorption system, thus to mechanical switch CB voltage-limiting protection.
After the arrester MOV1 movement in energy-absorbing compression limiter 5, line current is begun to decline.Due to route middle impedance
It is smaller, therefore the rate of decay can be very slow when current attenuation is near zero.At this point, triggering thyristor SCR1 again, make change of current branch
Road generates lesser oscillating current, so that change of current branch mechanical switch CB2 generates zero crossing, cut-offs change of current branch current, route
Electric current rapidly decays to zero, completes the failure on-off of first time.Change of current branch arrester MOV2 is mechanical for limiting change of current branch
The voltage at the both ends switch CB2.
After cut-offfing for the first time, the energy of recharged capacitance C11 has biggish consumption, and storage capacitor C12 is by filling
Resistance R1 charges to recharged capacitance C11, its energy is made to can satisfy the demand cut-off for the second time.
Later, reclosing operation is carried out.Before cut-offfing end for the first time, direct current system can pass through commutation capacitor C2, coupling
Reactor secondary inductance L2 charges to commutation capacitor C2.In reclosing, the energy of commutation capacitor C2 can pass through coupling electricity
Anti- device pair side L2, mechanical switch CB release generate the higher-order of oscillation and slower electric current of decaying.Therefore, in mutual reactor primary side
Inductance L2 both ends parallel connection energy consumption resistor R2, the conducting thyristor SCR2 in reclosing consume commutation capacitor by energy consumption resistor R2
On energy, make be overlapped brake current rapidly decay to zero.
After reclosing, the interrupting process of second of fault current is not as previously mentioned, repeat.
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing, to this reality
It is further elaborated with novel.It should be appreciated that specific embodiment described herein is only to explain the utility model,
It is not used to limit the utility model.
The utility model relates to a kind of manifold type high voltage DC breaker, has and two-way cut-off specified low current and interpolar is short
The function of road high current and reclosing can make line current rapidly decay to zero after cut-offfing, and meet the needs of not homologous ray.
For further description manifold type high voltage DC breaker provided by the embodiment of the utility model, now in conjunction with attached drawing and specifically
Examples detail is as follows:
Fig. 3 is current waveform when manifold type high voltage DC breaker reclosing cut-offs 25kA high current, and Fig. 4 is that this is practical
The high voltage DC breaker of novel offer cut-offs current waveform figure when 100A low current, and wherein x-axis is time t, unit s；Y-axis
For current amplitude, unit kA；Solid line represents line current, and dotted line represents mechanical switch electric current.Fig. 5 is provided by the utility model
The waveform diagram of dc circuit breaker recharged capacitance in interrupting process, wherein x-axis is time t, unit s；Y-axis is voltage magnitude,
Unit kV；Solid line represents the voltage of recharged capacitance C11, and dotted line represents the voltage of storage capacitor C12.
When cut-offfing 25kA fault current for Fig. 3 reclosing, in t1, thyristor SCR1 is acted, and cut-offs fault current, machine
The electric current of tool switch CB is rapidly to zero；Electric current is transferred to change of current branch later, charges to commutation capacitor C2, the electricity of commutation capacitor C2
Pressure is added in the both ends mechanical switch CB, when the voltage of mechanical switch CB reaches the operation voltage of energy-absorbing compression limiter MOV, arrester
MOV acts the energy of inductive element in absorption system, and line current is slowly drop down to zero, and persistent oscillation；Again in t2
Conducting thyristor SCR1, change of current branch generate oscillating current, and change of current branch mechanical switch CB2 cut-offs change of current branch current, route
Electric current rapidly decays to zero；In t3, breaker carries out reclosing operation, and conducting thyristor SCR2, passes through energy consumption resistor at this time
R2 rapidly depletes the energy of commutation capacitor C2, and mechanical switch switching current rapidly decays to zero.It is cut-off later according to above-mentioned
Principle carries out reclosing and cut-offs for the second time.
Fig. 4 is the waveform diagram for cut-offfing 100A low current, and in t1, thyristor SCR1 is acted, and primary side oscillating current passes through coupling
Reactor makes change of current branch also generate oscillating current, and being superimposed upon generation zero crossing blow-out, line current on mechanical switch CB will lead to
It crosses smoothing reactor L0, commutation capacitor C2 and mutual reactor secondary inductance L2 is extremely loaded, since load equivalent impedance is larger,
Change of current branch is in the overdamping state of second-order circuit, line current exponentially slow-decay to zero, have one it is longer
Hangover process.Trigger thyristor SCR1 again in t2, change of current branch generates oscillating current, change of current branch mechanical switch CB2
Zero crossing is generated, cut-offs change of current branch current, line current declines rapidly, rapidly decays to zero.
Fig. 5 is the voltage waveform of the recharged capacitance C11 and storage capacitor C12 in interrupting process.As seen from the figure, first
It is secondary cut-off after, the voltage of recharged capacitance C11 is reduced to rapidly 65kV or so by the 150kV being pre-charged, this will be difficult to meet second
It is secondary to cut-off demand.Therefore, storage capacitor C12 is charged by charging resistor R2 to recharged capacitance C11, and both final voltage is equal
For 100kV, it can satisfy and cut-off demand for the second time.
As it will be easily appreciated by one skilled in the art that the above is only the preferred embodiment of the utility model only, not
To limit the utility model, any modification made within the spirit and principle of the present invention, equivalent replacement and change
Into etc., it should be included within the scope of protection of this utility model.
Claims (5)
1. a kind of manifold type high voltage DC breaker characterized by comprising main loop unit (1), charging convertor unit (2),
Energy consumption unit (3), trigger unit (4) and energy-absorbing compression limiter (5)；
The main loop unit (1) is accessed in direct current system for connecting, the energy-absorbing compression limiter (5) and the major loop list
First (1) is connected in parallel, and the charging convertor unit (2) is connected in parallel with the main loop unit (1)；
First output end of the trigger unit (4) is connect with the charging convertor unit (2), and the of the trigger unit (4)
Two output ends are connect with energy consumption unit (3), and the trigger unit (4) after system jam for triggering the charging change of current
Unit (2), and the energy consumption unit (3) is triggered when reclosing；
Charging convertor unit (2) is reversely superimposed for generating the electric current of the higher-order of oscillation when a failure occurs it with fault current
It forms zero crossing and cut-offs fault current, and charge recharged capacitance for failure on-off after reclosing after cut-offfing for the first time；
The energy-absorbing compression limiter (5) after cut-offfing for absorbing the energy of energy storage in electric system inductive element, limitation
The voltage at mechanical switch both ends；
The energy consumption unit (3) also connect with the charging convertor unit (2), and the energy consumption unit (3) is for working as direct current interruption
The energy of commutation capacitor is consumed when thinking highly of combined floodgate to make the switching current on mechanical switch rapidly decay to zero.
2. manifold type high voltage DC breaker as described in claim 1, which is characterized in that the main loop unit (1) is can
Arcing and in current over-zero can blow-out mechanical switch.
3. manifold type high voltage DC breaker as claimed in claim 1 or 2, which is characterized in that the charging convertor unit (2)
It include: recharged capacitance C11, thyristor SCR1, storage capacitor C12, charging resistor R1, mutual reactor, commutation capacitor C2, machine
Tool switch CB2 and arrester MOV2；
One end of the recharged capacitance C11 is connect with one end of the mutual reactor primary side L1, the recharged capacitance C11
The other end connect with one end of the thyristor SCR1；The other end of the thyristor SCR1 and the mutual reactor primary side
The other end of L1 connects, and the storage capacitor C12 is in parallel with the recharged capacitance C11 after connecting with the charging resistor R1；
One end of the commutation capacitor C2 is connect with one end of mutual reactor pair side L2, and the commutation capacitor C2's is another
End is connected to one end of the mechanical switch CB2, and the arrester MOV2 is in parallel with the mechanical switch CB2, the coupling electricity
The other end of the other end of anti-device pair side L2 and the mechanical switch CB2 are respectively connected to the both ends of the main loop unit (1).
4. manifold type high voltage DC breaker as described in claim 1, which is characterized in that the energy consumption unit (3) includes: string
Join the energy consumption resistor R2 and thyristor SCR2 of connection, the non-series connection end ground connection of energy consumption resistor R2, the non-string of thyristor SCR2
Connection connecting pin is connect with the charging convertor unit (2) and the trigger unit (4) respectively.
5. manifold type high voltage DC breaker as described in claim 1, which is characterized in that energy-absorbing compression limiter (5) packet
Include: Zinc-Oxide Arrester, both ends are connected to the both ends of the main loop unit (1).
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| CN201821048543.0U CN208368418U (en) | 2018-07-02 | 2018-07-02 | A kind of manifold type high voltage DC breaker |
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| CN201821048543.0U CN208368418U (en) | 2018-07-02 | 2018-07-02 | A kind of manifold type high voltage DC breaker |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112824918A (en) * | 2019-11-20 | 2021-05-21 | 西安高压电器研究院有限责任公司 | Device and method for detecting reclosing performance of direct-current circuit breaker |
| CN114123770A (en) * | 2021-11-03 | 2022-03-01 | 西安交通大学 | Stacked magnetic coupling current transfer module and current switching-on/off method |
| CN114362116A (en) * | 2022-01-17 | 2022-04-15 | 山东大学 | Coupling inductance type flexible direct current power grid fault current limiter and control method thereof |
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2018
- 2018-07-02 CN CN201821048543.0U patent/CN208368418U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112824918A (en) * | 2019-11-20 | 2021-05-21 | 西安高压电器研究院有限责任公司 | Device and method for detecting reclosing performance of direct-current circuit breaker |
| CN114123770A (en) * | 2021-11-03 | 2022-03-01 | 西安交通大学 | Stacked magnetic coupling current transfer module and current switching-on/off method |
| CN114123770B (en) * | 2021-11-03 | 2023-08-08 | 西安交通大学 | Superimposed magnetic coupling current transfer module and current switching-on and switching-off method |
| CN114362116A (en) * | 2022-01-17 | 2022-04-15 | 山东大学 | Coupling inductance type flexible direct current power grid fault current limiter and control method thereof |
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