CN108766830A - A kind of manifold type high voltage DC breaker - Google Patents
A kind of manifold type high voltage DC breaker Download PDFInfo
- Publication number
- CN108766830A CN108766830A CN201810709084.4A CN201810709084A CN108766830A CN 108766830 A CN108766830 A CN 108766830A CN 201810709084 A CN201810709084 A CN 201810709084A CN 108766830 A CN108766830 A CN 108766830A
- Authority
- CN
- China
- Prior art keywords
- current
- unit
- energy
- mechanical switch
- cut
- Prior art date
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/59—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle
- H01H33/596—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle for interrupting dc
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/541—Contacts shunted by semiconductor devices
- H01H9/542—Contacts shunted by static switch means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/547—Combinations of mechanical switches and static switches, the latter being controlled by the former
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The present invention provides a kind of mechanical high voltage DC breaker with mutual reactor, including：Main loop unit, charging convertor unit, energy consumption unit, trigger element 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 element after system jam for triggering the charging convertor unit and triggering the energy consumption unit when reclosing；Charge electric current of the convertor unit for generating 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 is used for failure on-off after reclosing to 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；Unit consume energy 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 invention belongs to high voltage DC breaker fields, more particularly, to a kind of novel mechanical with mutual reactor
Formula high voltage DC breaker.
Background technology
In recent years, with the continuous fast development increased with regenerative resource 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, fed 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 capable of realize 2 points it
Between energy transmission, when using direct current transportation between multiple load center power transmissions or multiple AC systems use direct current interconnect when,
It needs 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 fully 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, multi-terminal HVDC transmission, which also has, can be achieved
Multiple feed, more drop points are by electricity；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 can cause change of current top-cross stream breaker actuation, change of current valve group to close 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 ensures the normal operation of system.Therefore, high voltage DC breaker builds the key of reliable multiterminal flexible direct current power grid and sets
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 of 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.
Invention content
For the disadvantages described above or Improvement requirement of the prior art, the present invention provides a kind of open circuits of manifold type high voltage direct current
Device is swift in motion to high voltage DC breaker itself, cut-offs high current, low current and bear high voltage meeting straight-flow system
On the basis of, solve the problems, such as that existing high voltage DC breaker is of high cost, thyristor withstanding voltage is high；For coupled type high voltage
Dc circuit breaker, line current will be transferred to change of current branch after cut-offfing, and lead to the problem of low current afterflow, and in the present invention
Manifold type high voltage DC breaker can be good at solving the problems, such as this, while proposed manifold type high voltage DC breaker tool
There is the function that two-way reclosing is cut-off, can meet the needs of different straight-flow systems.
The present invention provides a kind of manifold type high voltage DC breakers, including：Main loop unit, charging convertor unit, consumption
It can unit, trigger element and energy-absorbing compression limiter；Main loop unit is accessed for connecting in straight-flow system, the energy-absorbing pressure limiting list
Member is connected in parallel with main loop unit, and the charging convertor unit is connected in parallel with the main loop unit；The trigger element
The first output end connect with the charging convertor unit, the second output terminal of the trigger element is connect with energy consumption unit, institute
It states trigger element to be used to trigger the charging convertor unit after system jam, and triggers the energy consumption when reclosing
Unit；Electric current of the charging convertor unit for generating the higher-order of oscillation when a failure occurs it, shape is reversely superimposed with fault current
Fault current is cut-off at zero crossing, and charges recharged capacitance for failure on-off after reclosing after cut-offfing for the first time；Institute
State energy of the energy-absorbing compression limiter for absorbing energy storage in electric system inductive element after cut-offfing, limit mechanical switch two
The voltage at end；The energy consumption unit is also connect with the charging convertor unit, and the energy consumption unit is used to think highly of when direct current interruption
The energy of commutation capacitor is consumed when combined floodgate 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 includes：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 being connected in series with, energy consumption resistor
R2 it is non-be connected in series with end ground connection, thyristor SCR2 it is non-be connected in series with end respectively with the charging convertor unit and the triggering
Unit connects.
Further, the energy-absorbing compression limiter includes：Zinc-Oxide Arrester, 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 flowed to negative by the mechanical switch CB
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 contacts are 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 element triggers the thyristor SCR1, leads away from reaching specified
Lead to the charging convertor unit, the recharged capacitance C11 is vibrated with the mutual reactor primary inductor L 1, passes 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 that system maximum fault current amplitude cut-offs fault current to make the mechanical switch CB generate zero crossing blow-out；
After the mechanical switch CB zero passage blow-outs, line current is transferred to the mutual reactor secondary inductance L2 and change of current electricity
Hold C2 change of current branches in series, is gradually increasing to the voltage of the commutation capacitor C2, and be 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 action 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 earth fault, fault current amplitudes are larger, then line current passes through the coupling after cut-offfing
Reactor secondary inductance L2, commutation capacitor C2 oscillations, 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 line current can there are one longer during declining
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, and change of current branch is made to generate oscillating current, to which 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 voltages.
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 to the recharged capacitance by the charging resistor R1, can meet and cut-off for the second time.
Since after cut-offfing for the first time, the commutation capacitor C2 voltages are consistent with system voltage, the change of current of when reclosing
Capacitance C2 generates frequency and the higher oscillating current of amplitude with mutual reactor pair side L2 oscillations, 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, to which the mechanical switch electric current rapidly decays to zero.
The present invention has the following advantages：
(1) IGBT group unit, no arc triggering is used not to 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 element and the difficulty of drive control
Degree；Recharged capacitance C11 is located at low-pressure side, and pre-charge voltage grade is relatively low, over the ground naked requirement, to live part
The resistance to pressure request that insulate is relatively low, and solves the problems, such as high potential, the charging of more current potentials；High-pressure side commutation capacitor C2 is in normal operation 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) mesohigh dc circuit breaker of the present invention change of current branch connect change of current branch mechanical switch, and its both ends simultaneously
Join arrester.The traditional coupled mode machinery dc circuit breaker of comparison, which can trigger thyristor again after cut-offfing end makes
Change of current branch mechanical switch generates zero crossing makes line current rapidly decay to zero to cut-off change of current branch current.Meanwhile
By in change of current branch mechanical switch both ends lightning arrester connected in parallel, limiting its both end voltage, further decreasing its cost.
(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, coincidence brake current is avoided to be caused negatively to cut-offfing for the second time
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
It is interior when being cut-off for the second time, it charges to recharged capacitance according to transformer, then requires the power of transformer very big, this pair is set
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.
Description of the drawings
Fig. 1 is a kind of functional block diagram of manifold type high voltage DC breaker provided by the invention；
Fig. 2 is a kind of concrete structure block diagram of manifold type high voltage DC breaker provided by the invention；
Fig. 3 is oscillogram when manifold type high voltage DC breaker reclosing provided by the invention cut-offs fault current；
Fig. 4 is oscillogram when manifold type high voltage DC breaker provided by the invention cut-offs low current；
Fig. 5 is the voltage of recharged capacitance in manifold type high voltage DC breaker reclosing interrupting process provided by the invention
Oscillogram.
Wherein, 1 is main loop unit, and 2 be charging convertor unit, and 3 be energy consumption unit, and 4 be trigger element, 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 capacitance, 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 currents, 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 implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
It does not constitute a conflict with each other and can be combined with each other.
The object of the present invention is to provide a kind of manifold type high voltage DC breakers, disconnected to high voltage direct current meeting straight-flow system
Road device itself is swift in motion, cut-off high current and bear high voltage on the basis of, thyristor, pre- will be triggered by mutual reactor
Charging capacitor is placed in low-pressure side, reduces equipment cost, improves the reliability cut-off.Meanwhile the present invention is also with two-way heavy
It closes a floodgate the function cut-off, and limits the amplitude of line current after cut-offfing, meet the needs of different system.
Fig. 1 is a kind of functional block diagram of manifold type high voltage DC breaker provided by the invention, and Fig. 2 is provided by the invention
A kind of concrete structure block diagram of manifold type high voltage DC breaker.Manifold type high voltage DC breaker provided by the invention includes：
Main loop unit 1, charging convertor unit 2, energy consumption unit 3, trigger element 4 and energy-absorbing compression limiter 5；Wherein, main loop unit 1
In series connection access straight-flow system, charging convertor unit 2 and energy-absorbing compression limiter 5 are in parallel with main loop unit 1, and trigger element 4 divides
It is not in parallel with charging convertor unit 2 and energy consumption unit 3；Wherein, main loop unit 1 is mechanical switch CB, and mechanical switch CB is can
Arcing and current zero-crossing point can blow-out cut-off.Charging convertor unit 2 includes recharged capacitance C11, storage capacitor C12, fills
Resistance R1, thyristor SCR1, mutual reactor, commutation capacitor C2, change of current branch mechanical switch CB2, arrester MOV2, wherein
Recharged capacitance C11, thyristor SCR1 and mutual reactor primary inductor L 1 are connected in series with, storage capacitor C12 and charging resistor
R1 connects, and the two is connected in parallel on the both ends recharged capacitance C11, for charging to recharged capacitance C11 after cut-offfing for the first time；Change of current electricity
Hold C2 to connect with mutual reactor pair side L2, change of current branch mechanical switch CB2, arrester MOV2 is connected in parallel on change of current branch machinery and opens
The both ends CB2 are closed, its both end voltage is limited.The unit 3 that consumes energy includes thyristor SCR2 and energy consumption resistor R2, the two and mutual reactor
Primary inductor L 1 is connected in series with, and the energy of commutation capacitor is consumed when for dc circuit breaker reclosing to make on mechanical switch
Switching current rapidly decays to zero.The output end of trigger element 4 is connect with the control terminal of charging convertor unit 2 and the unit 3 that consumes energy,
When electric system is broken down, trigger element 4 makes 2 triggering and conducting of charging convertor unit and generates to shake for generating trigger signal
It swings electric current and is superimposed generation zero crossing with fault current；In reclosing, the triggering energy consumption unit 3 of trigger element 4 makes energy consumption unit 3 inhale
It receives energy and accelerates the rate of decay of mechanical switch electric current.Energy-absorbing compression limiter 5 is Zinc-Oxide Arrester, for limiting major loop
The voltage at the both ends unit mechanical switch CB.
In present example, the major function of main loop unit 1 is to cut-off event in current zero-crossing point by mechanical switch CB
Hinder electric current；The major function of charging convertor unit 2 has at 3 points：1. recharged capacitance C11 generates high frequency vibrating with mutual reactor L1
Electric current is swung, oscillating current is generated in change of current branch by mutual reactor, is superimposed upon on mechanical switch CB, manually manufactures zero crossing
Mechanical switch CB is set to cut-off；2. when cut-offfing end, line current dropping near zero, thyristor SCR1 is triggered again, makes to change
It flows branch and generates oscillating current, change of current branch mechanical switch CB2 is disconnected, and to cut-off change of current branch current, keeps line current fast
Speed drops to zero；3. after cut-offfing for the first time, storage capacitor C12 is charged by charging resistor R1 to recharged capacitance C11, is made
Its voltage satisfaction cut-offs demand for the second time；Energy consumption unit 3 is act as, and in reclosing operation, is consumed in commutation capacitor C2
Energy makes switching current rapidly decay to zero, avoids the influence to second of interrupting process；The main work(of energy-absorbing compression limiter 5
Can be realized to mechanical switch CB for absorbing the energy that inductive element stores in straight-flow system after fault current is cut off
Voltage-limiting protection；The major function of trigger element 4 is turned it on for triggering charging convertor unit after the system failure, in reclosing
When triggering energy consumption unit absorb energy.
For further description manifold type high voltage DC breaker provided in an embodiment of the present invention, its work is now described in detail
Process is as follows：
When system worked well, mechanical switch CB is in "on" position, and system power is loaded by mechanical switch CB flow directions,
On-state loss is smaller.
When system jam, since the used unit that cut-offs is that unit is cut-off in ripe 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 element sends out signal, and primary side thyristor SCR1 is made to touch
Hair conducting, recharged capacitance C11 and mutual reactor primary side L1 generate high frequency oscillating current, to mutual reactor pair side L2 with
Commutation capacitor C2 also will produce 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 is superimposed, and so that mechanical switch CB is generated zero crossing, is mechanical switch CB blow-outs 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 is constituted with commutation capacitor C2, 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, to mechanical switch CB voltage-limiting protections.
After arrester MOV1 actions in energy-absorbing compression limiter 5, line current is begun to decline.Due to circuit 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 smaller oscillating current, to which change of current branch mechanical switch CB2 generates zero crossing, cut-offs change of current branch current, circuit
Electric current rapidly decays to zero, completes the failure on-off of first time.Change of current branch arrester MOV2 is for limiting change of current branch machinery
The voltage at the both ends switch CB2.
After cut-offfing for the first time, the energy of recharged capacitance C11 has larger consumption, and storage capacitor C12 is by filling
Resistance R1 charges to recharged capacitance C11, its energy is made to disclosure satisfy that the demand cut-off for the second time.
Later, reclosing operation is carried out.Before cut-offfing end for the first time, straight-flow 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 be by coupling electricity
Anti- device pair side L2, mechanical switch CB releases, 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, so that coincidence brake current is rapidly decayed to zero.
After reclosing, the interrupting process of second of fault current is not as previously mentioned, repeat.
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with attached drawing, to the present invention into
Row is further described.It should be appreciated that described herein, specific examples are only used to explain the present invention, is not used to limit
The present invention.
The present invention relates to a kind of manifold type high voltage DC breaker, has and two-way cut-off specified low current and intereelectrode short-circuit is big
The function of electric current and reclosing can make line current rapidly decay to zero, meet the needs of different system after cut-offfing.In order to
Further description manifold type high voltage DC breaker provided in an embodiment of the present invention is described in detail in conjunction with attached drawing and specific example
It is as follows：
Fig. 3 is current waveform when manifold type high voltage DC breaker reclosing cut-offs 25kA high currents,
Fig. 4 is current waveform figure when high voltage DC breaker provided by the invention cut-offs 100A low currents, and wherein x-axis is
Time t, unit s；Y-axis is current amplitude, unit kA；Solid line represents line current, and dotted line represents mechanical switch electric current.Fig. 5 is
The oscillogram of dc circuit breaker provided by the invention recharged capacitance in interrupting process, wherein x-axis are time t, unit s；Y-axis
For 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 currents for Fig. 3 reclosings, 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, circuit
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 makes the energy of commutation capacitor C2 quickly consume, 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 oscillogram for cut-offfing 100A low currents, 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, and exponentially for slow-decay to zero, there are one longer for line current
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 meet and cut-off demand for the second time.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, all within the spirits and principles of the present invention made by all any modification, equivalent and improvement etc., should all include
Within protection scope of the present invention.
Claims (9)
1. a kind of manifold type high voltage DC breaker, which is characterized in that including：Main loop unit (1), charging convertor unit (2),
Consume energy unit (3), trigger element (4) and energy-absorbing compression limiter (5)；
The main loop unit (1) is accessed for connecting in straight-flow system, 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 element (4) is connect with the charging convertor unit (2), and the of the trigger element (4)
Two output ends are connect with energy consumption unit (3), and the trigger element (4) after system jam for triggering the charging change of current
Unit (2), and the energy consumption unit (3) is triggered when reclosing；
Electric current of the charging convertor unit (2) for generating the higher-order of oscillation when a failure occurs it, is reversely superimposed 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；
Energy of the energy-absorbing compression limiter (5) for absorbing energy storage in electric system inductive element after cut-offfing, 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)
Including：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 any one of claims 1-3, which is characterized in that the energy consumption unit
(3) include：The non-of the energy consumption resistor R2 and thyristor SCR2 being connected in series with, energy consumption resistor R2 is connected in series with end ground connection, thyristor
The non-end that is connected in series with of SCR2 is connect with the charging convertor unit (2) and the trigger element (4) respectively.
5. manifold type high voltage DC breaker according to any one of claims 1-4, which is characterized in that the energy-absorbing pressure limiting list
First (5) include：Zinc-Oxide Arrester, both ends are connected to the both ends of the main loop unit (1).
6. manifold type high voltage DC breaker as described in any one in claim 1-5, which is characterized in that work as system worked well
When, mechanical switch CB is closed, and system power is flowed to by the mechanical switch CB and loaded, and on-state loss is smaller；
When short trouble occurs for system, mechanical switch CB contacts are opened and arcing, in the clearance between open contacts of the mechanical switch CB
Reach specified to open away from after being resistant to the recovery voltage after cut-offfing, the trigger element triggers the thyristor SCR1, and institute is connected
Charging convertor unit is stated, the recharged capacitance C11 is vibrated with the mutual reactor primary inductor L 1, passes through coupling electricity
Anti- device makes the mutual reactor secondary inductance L2 and commutation capacitor C2 generate reversing oscillating current, and oscillating current amplitude
More than system maximum fault current amplitude fault current is cut-off to make the mechanical switch CB generate zero crossing blow-out；
After the mechanical switch CB zero passage blow-outs, line current is transferred to the mutual reactor secondary inductance L2 and is changed with described
Galvanic electricity holds C2 change of current branches in series, is gradually increasing to the voltage of the commutation capacitor C2, and be applied to the machinery
The both ends switch CB, when voltage magnitude rises to the operation voltage of the energy-absorbing compression limiter, the energy-absorbing compression limiter is lightning-arrest
It acts, the perceptual energy in absorption circuit, to the mechanical switch voltage-limiting protection, while line current is begun to decline.
7. manifold type high voltage DC breaker as claimed in any one of claims 1 to 6, which is characterized in that when line fault is to connect
When earth fault, cut-off rear line current by the mutual reactor secondary inductance L2, commutation capacitor C2 oscillation, the rate of decay compared with
Slowly；
When line fault is high resistance grounding failure, cut-offs rear change of current branch and be in overdamping state, line current declined
There are one longer hangovers by Cheng Zhonghui, and when line current drops near zero, the trigger element triggers the crystalline substance again
Brake tube SCR1 makes change of current branch generate oscillating current so that the mechanical switch CB2 disconnects change of current branch electricity in zero crossing
Stream.
8. such as claim 1-7 any one of them manifold type high voltage DC breakers, which is characterized in that cut-offfing knot for the first time
The voltage at the both ends Shu Hou, the recharged capacitance C11 can decay, and the storage capacitor C12 is by the charging resistor R1 to institute
It states recharged capacitance and charges to meet and cut-off for the second time.
9. such as claim 1-8 any one of them manifold type high voltage DC breakers, which is characterized in that carrying out reclosing behaviour
When making, the thyristor SCR2 is connected, the high frequency oscillating current generated on the mechanical switch is made to pass through the energy consumption resistor R2
Release, so that the mechanical switch electric current rapidly decays to zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810709084.4A CN108766830B (en) | 2018-07-02 | 2018-07-02 | Coupling type high-voltage direct-current breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810709084.4A CN108766830B (en) | 2018-07-02 | 2018-07-02 | Coupling type high-voltage direct-current breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108766830A true CN108766830A (en) | 2018-11-06 |
| CN108766830B CN108766830B (en) | 2023-09-29 |
Family
ID=63975322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810709084.4A Active CN108766830B (en) | 2018-07-02 | 2018-07-02 | Coupling type high-voltage direct-current breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108766830B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109687386A (en) * | 2019-02-02 | 2019-04-26 | 四川大学 | Hybrid dc circuit breaker with reclosing ability buffers branch |
| CN111355213A (en) * | 2018-12-21 | 2020-06-30 | 平高集团有限公司 | Direct current breaker |
| CN111786355A (en) * | 2020-06-23 | 2020-10-16 | 上海电器科学研究所（集团）有限公司 | Protection device and protection method for restraining short circuit of direct current bus support capacitor |
| CN113725831A (en) * | 2021-08-18 | 2021-11-30 | 华中科技大学 | Economical mechanical high-voltage direct-current circuit breaker |
| CN113824083A (en) * | 2021-07-09 | 2021-12-21 | 天津大学 | Hybrid direct current breaker with self-adaptive reclosing |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117528A (en) * | 2013-01-17 | 2013-05-22 | 国网智能电网研究院 | Series capacitor type high-voltage direct current breaker and control method thereof |
| CN203165824U (en) * | 2013-01-17 | 2013-08-28 | 国网智能电网研究院 | Series coupling inductance high voltage direct current circuit breaker |
| CN105186443A (en) * | 2015-10-21 | 2015-12-23 | 华中科技大学 | Automatic-charging forced zero-crossing high-voltage direct-current breaker |
| CN205429693U (en) * | 2015-11-20 | 2016-08-03 | 中国船舶重工集团公司第七一二研究所 | Two -way composite direct current breaker |
| CN106981858A (en) * | 2016-12-29 | 2017-07-25 | 全球能源互联网研究院 | Dc circuit breaker and its control method |
| CN107863761A (en) * | 2017-11-29 | 2018-03-30 | 中国南方电网有限责任公司电网技术研究中心 | A kind of high voltage DC breaker with saturable reactor |
-
2018
- 2018-07-02 CN CN201810709084.4A patent/CN108766830B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117528A (en) * | 2013-01-17 | 2013-05-22 | 国网智能电网研究院 | Series capacitor type high-voltage direct current breaker and control method thereof |
| CN203165824U (en) * | 2013-01-17 | 2013-08-28 | 国网智能电网研究院 | Series coupling inductance high voltage direct current circuit breaker |
| CN105186443A (en) * | 2015-10-21 | 2015-12-23 | 华中科技大学 | Automatic-charging forced zero-crossing high-voltage direct-current breaker |
| CN205429693U (en) * | 2015-11-20 | 2016-08-03 | 中国船舶重工集团公司第七一二研究所 | Two -way composite direct current breaker |
| CN106981858A (en) * | 2016-12-29 | 2017-07-25 | 全球能源互联网研究院 | Dc circuit breaker and its control method |
| CN107863761A (en) * | 2017-11-29 | 2018-03-30 | 中国南方电网有限责任公司电网技术研究中心 | A kind of high voltage DC breaker with saturable reactor |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111355213A (en) * | 2018-12-21 | 2020-06-30 | 平高集团有限公司 | Direct current breaker |
| CN111355213B (en) * | 2018-12-21 | 2023-09-01 | 平高集团有限公司 | Direct current breaker |
| CN109687386A (en) * | 2019-02-02 | 2019-04-26 | 四川大学 | Hybrid dc circuit breaker with reclosing ability buffers branch |
| CN111786355A (en) * | 2020-06-23 | 2020-10-16 | 上海电器科学研究所（集团）有限公司 | Protection device and protection method for restraining short circuit of direct current bus support capacitor |
| CN113824083A (en) * | 2021-07-09 | 2021-12-21 | 天津大学 | Hybrid direct current breaker with self-adaptive reclosing |
| CN113725831A (en) * | 2021-08-18 | 2021-11-30 | 华中科技大学 | Economical mechanical high-voltage direct-current circuit breaker |
| CN113725831B (en) * | 2021-08-18 | 2022-05-20 | 华中科技大学 | Economical mechanical high-voltage direct-current circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108766830B (en) | 2023-09-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108766830A (en) | A kind of manifold type high voltage DC breaker | |
| CN104638605B (en) | A kind of capacitive buffer formula mixed high-voltage dc circuit breaker and its control method | |
| CN107863761A (en) | A kind of high voltage DC breaker with saturable reactor | |
| EP3288132B1 (en) | High voltage dc circuit breaker having coupled inductor | |
| CN104242229A (en) | Multi-break hybrid direct current breaker | |
| CN107276045B (en) | A kind of mixed DC current limiting circuit breaker | |
| CN106300291A (en) | Hybrid high voltage DC breaker based on IGBT | |
| CN108597926A (en) | A kind of hybrid direct-current breaker topology structure and its control method | |
| CN103337851A (en) | Semi-controlled active injection current high voltage direct current breaker and realization method thereof | |
| CN105186443B (en) | A kind of automatic charging type forces zero passage high voltage DC breaker | |
| CN105720552B (en) | A kind of current-limiting type high voltage DC breaker | |
| CN103441489B (en) | A kind of MTDC transmission system DC circuit breaker and control method thereof | |
| CN110224379A (en) | Based on vacuum and the concatenated novel high-pressure dc circuit breaker of SF6 arc-chutes | |
| CN107275145A (en) | A kind of Quick mechanical formula switch and the high-voltage electric power system switched using the Quick mechanical formula | |
| CN101515710A (en) | Direct current limiting and breaking device based on countercurrent injection method | |
| CN107565524A (en) | A kind of new Quick mechanical formula high voltage DC breaker | |
| CN103681039A (en) | High-voltage direct-current breaker topology | |
| CN103646805A (en) | Direct-current breaker topology | |
| CN111224383A (en) | Direct current breaker with rapid reclosing function | |
| CN208368418U (en) | A kind of manifold type high voltage DC breaker | |
| CN107332440B (en) | A kind of Pulsed Laser pump supply source circuit based on mutual reactor | |
| CN210430911U (en) | Direct current breaker | |
| CN103647263B (en) | Dc circuit breaker based on half control type power electronic devices | |
| CN207251194U (en) | A kind of new Quick mechanical formula high voltage DC breaker | |
| CN106786434A (en) | A kind of superconductive failure current limiter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |