CN205160029U - Automatic chargeable type forces zero passage high voltage direct current circuit breaker - Google Patents
Automatic chargeable type forces zero passage high voltage direct current circuit breaker Download PDFInfo
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- CN205160029U CN205160029U CN201520829707.3U CN201520829707U CN205160029U CN 205160029 U CN205160029 U CN 205160029U CN 201520829707 U CN201520829707 U CN 201520829707U CN 205160029 U CN205160029 U CN 205160029U
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Abstract
The utility model discloses an automatic chargeable type forces zero passage high voltage direct current circuit breaker, this circuit breaker include fast switch unit, energy -absorbing unit, coupling reactance ware unit, change of current electric capacity unit and major loop isolator unit. The fast switch unit comprises fast switch and fast switch energy supply module, system voltage after the fast switch is used for undertakeing the electric current and cut -offs, the energy -absorbing unit is used for carrying out the voltage limiting protection to the fast switch, coupling reactance ware unit is used for coupling fault line and change of current electric capacity branch road, change of current electric capacity unit is used for forming the vibration with coupling reactance ware unit, major loop isolator unit is used for cut -offfing successfully back disconnection at the circuit breaker to protection direct current breaker inner member. The utility model provides an automatic chargeable type forces zero passage high voltage direct current circuit breaker, precharge equipment is small, change of current branch road trigger switch speed requirement low, control is simple, can cut -off the fault current of arbitrary direction.
Description
Technical field
The utility model belongs to high voltage DC breaker field, more specifically, relates to a kind of automatic charging type and forces zero passage high voltage DC breaker.
Background technology
Compared with ac transmission, high voltage direct current transmission has track cost economy, two end systems without the need to the advantage such as stable operation, power adjustments be simple, is particularly suitable for superhigh pressure, Large Copacity, long distance power transmission.At present, the HVDC engineering put into operation in the world has more than 90, and total capacity is more than 70000MW.But the HVDC (High Voltage Direct Current) transmission system run in the world is point to point connect, AC circuit breaker can only be disconnected when breaking down, thus causing whole current conversion station to be stopped transport, the reliability of extreme influence DC transmission system, reason is just do not have operational high voltage DC breaker.This defect not only limit the performance of high voltage direct current transmission superiority, also governs foundation and the development of multiterminal element electrical network.
When be short-circuited fault time, the Low ESR of direct current system causes short circuit current to rise rapidly, therefore must ensure that DC circuit breaker reliably excises short trouble within the time short as far as possible.Meanwhile, because DC circuit breaker needs to bear higher transient recovery voltage during drop-out current, must ensure that main switch branch road meets insulating requirements.
One of scheme that high voltage DC breaker field receives much concern is exactly that zero passage high voltage DC breaker is forced in precharge, namely the feature of regular alternating current mechanical chopper current over-zero blow-out is utilized, the reverse high frequency oscillating current produced by recharged capacitance and inductance superposes to produce " artificial current zero " with direct fault current in high-speed switch, thus extinguish arcs, drop-out current.But this kind of scheme, requires very high to the fast and reliable conducting of change of current branch road trigger switch, be difficult to meet bi-directional failure electric current and cut-off and fault reclosing such as to cut-off at the function, and the precharge device needed is bulky, equipment is various, controls complicated.
Utility model content
For above defect or the Improvement requirement of prior art, the purpose of this utility model is to provide a kind of automatic charging type and forces zero passage high voltage DC breaker, is intended to solve the technical problem that precharge in prior art is forced that zero passage high voltage DC breaker precharge device is bulky, change of current branch road trigger switch rate request is high, it is complicated to control and only cut-off unidirectional fault electric current.
The utility model provides a kind of automatic charging type and forces zero passage high voltage DC breaker, comprises high-speed switch unit, energy-absorbing unit, mutual reactor unit, commutation capacitor unit, the first isolating switch and the second isolating switch; Mutual reactor unit comprises former limit winding and vice-side winding; First isolating switch, described high-speed switch unit, described former limit winding and described second isolating switch are sequentially connected in series; Described energy-absorbing unit and described high-speed switch unit are connected in parallel; Commutation capacitor unit is connected in parallel with described energy-absorbing unit after connecting with vice-side winding again.Energy-absorbing unit is cut off for absorbing fault current the voltage-limiting protection that energy that inductive element in rear electric power system stores realizes described high-speed switch; Coupling fault current flowing circuit and described commutation capacitor unit place branch road when mutual reactor unit is used for breaking down; First isolating switch and described second isolating switch are used for disconnecting protecting DC circuit breaker after electric current excises completely.The utility model fast and reliable can cut off the fault current of any direction.
Further, commutation capacitor unit comprises commutation capacitor, pre-charge module and charge switch; Charge switch and described commutation capacitor are connected in series, and the non-series connection link of commutation capacitor is used for being connected with described vice-side winding, and described commutation capacitor is used for vibrating with described vice-side winding; The non-series connection link of charge switch is used for being connected with the link of the first isolating switch and high-speed switch unit; Charge switch is used for when opening to cut off remaining oscillating current after described energy-absorbing unit dissipative system energy, and controls the charging process of described commutation capacitor before cutting off rated current; Pre-charge module is connected to the charging end of commutation capacitor, for giving described commutation capacitor precharge when cut-offfing rated current.
Further, the high-speed switch unit high-speed switch power module that comprises high-speed switch and be connected with the feeder ear of described high-speed switch; High-speed switch is for the system voltage after bearing electric current and cut-offfing, and high-speed switch power module is used for providing power supply to the operating mechanism in described high-speed switch.
Further, described high-speed switch is single high-speed switch or N number of high-speed switch be sequentially connected in series; N be greater than 1 positive integer.Each high-speed switch RC in parallel all presses branch road.
Further, when either direction is short-circuited fault, also there is arcing in the disjunction at once of described high-speed switch, fault current in the winding of described former limit rises and the magnetic field that changes gradually, induced current is produced in described vice-side winding, induced current and fault current equidirectional with the automatic charging realized described commutation capacitor, discharged by described vice-side winding after described commutation capacitor charging complete, discharging current and fault current are oppositely and superpose generation current zero point, described high-speed switch blow-out, electric current is all transferred to described commutation capacitor and described vice-side winding branch road, when described high-speed switch both end voltage reaches the operating value of described energy-absorbing unit, described energy-absorbing unit conducting dissipative system energy, open described charge switch to cut off remaining oscillating current.
Further, when cutting off rated current, disconnect described charge switch, described pre-charge module gives described commutation capacitor precharge, after closed described charge switch, described commutation capacitor and described vice-side winding form high frequency oscillating current and superpose with the rated current in described high-speed switch with generation current zero point, and current transfer is described commutation capacitor extremely, when the voltage rise of described commutation capacitor is to the operating value of described energy-absorbing unit, described energy-absorbing unit conducting dissipative system energy.
Further, without the need to described commutation capacitor precharge during disengagement failure electric current, the automatic charging of commutation capacitor is realized by described mutual reactor unit; Need precharge device when only cutting off rated current, reduce volume and the cost of precharge device.
Further, mutual reactor unit is the form that iron core mutual reactor, hollow coupling reactor or smoothing reactor add coupling coil.
Meanwhile, the utility model can carry out series connection and use with the modularization realizing high voltage DC breaker, meets the demand of different voltage levels direct current transmission system flexibly.
In sum, zero passage high voltage DC breaker forced by a kind of automatic charging type that the utility model provides, high voltage DC breaker itself is swift in motion meeting direct current system, cut-off big current and bear on high-tension basis, be coupled with commutation capacitor unit place branch road by mutual reactor unit fault current circulated circuit, make it possible to the fault current cut-offfing any direction, and without the need to precharge device, without the need to dropping into the high speed trigger switch of commutation capacitor place branch road fast, thus solve existing pressure zero-based high voltage DC breaker and be difficult to meet the functions such as bi-directional failure electric current cut-offs, precharge device volume is large, the trigger switch of change of current branch road requires high and controls the problems such as complicated.
Accompanying drawing explanation
The theory diagram of the automatic charging type pressure zero passage high voltage DC breaker that Fig. 1 provides for the utility model embodiment;
The physical circuit figure of the automatic charging type pressure zero passage high voltage DC breaker that Fig. 2 provides for the utility model embodiment;
The physical circuit figure of the multi-break series connection use of the automatic charging type pressure zero passage high voltage DC breaker that Fig. 3 provides for the utility model embodiment;
The physical circuit figure of the multimode series connection use of the automatic charging type pressure zero passage high voltage DC breaker that Fig. 4 provides for the utility model embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.In addition, if below in described each execution mode of the utility model involved technical characteristic do not form conflict each other and just can mutually combine.
The utility model is swift in motion to high voltage DC breaker itself, cut-offs big current and bears on high-tension basis meeting direct current system, solves that existing pressure zero-based high voltage DC breaker precharge device volume is large, the requirement of change of current branch switch is high, it is complicated to control and only cut-offs the technical problem of single direction fault current.
Zero passage high voltage DC breaker forced by a kind of automatic charging type that the utility model provides, and comprises high-speed switch unit, energy-absorbing unit, mutual reactor unit, commutation capacitor unit and major loop Disconnecting switch unit; Mutual reactor unit comprises former limit winding and vice-side winding; Major loop Disconnecting switch unit comprises the first isolating switch and the second isolating switch; First isolating switch and high-speed switch unit, former limit winding, described second isolating switch are sequentially connected in series, high-speed switch unit and described energy-absorbing unit are connected in parallel, one end of commutation capacitor unit is connected with the input of high-speed switch unit, and the other end is connected by the output of vice-side winding with described high-speed switch unit.The high-speed switch power module that high-speed switch unit comprises high-speed switch and is connected with the feeder ear of high-speed switch; High-speed switch is for the system voltage after bearing electric current and cut-offfing, and high-speed switch power module is used for providing power supply to the operating mechanism in high-speed switch; Energy-absorbing unit is cut off for absorbing fault current the voltage-limiting protection that energy that inductive element in rear electric power system stores realizes high-speed switch; Coupling fault current flowing circuit and commutation capacitor unit place branch road when mutual reactor unit is used for breaking down; Commutation capacitor unit comprises the charge switch and commutation capacitor that are sequentially connected in series, and the pre-charge module be connected with commutation capacitor charging end; Commutation capacitor is used for producing resonance with vice-side winding; To commutation capacitor precharge when pre-charge module is used for cut-offfing rated current; Charge switch disconnects when being used for cut-offfing rated current, and commutation capacitor is charged smoothly, and oscillating current remaining after cutting off energy absorbing component dissipative system energy; Major loop Disconnecting switch unit is used for disconnecting protecting DC circuit breaker after electric current excises completely.
Wherein, when a failure occurs it, also there is arcing in high-speed switch disjunction at once, fault current in the winding of former limit rises and the magnetic field that changes gradually, induced current is produced in vice-side winding, induced current and fault current equidirectional with the automatic charging realized commutation capacitor, discharged by described vice-side winding after commutation capacitor charging complete, discharging current and fault current are oppositely and superpose generation current zero point, high-speed switch blow-out, electric current is all transferred to described commutation capacitor and described vice-side winding branch road, when described high-speed switch both end voltage reaches the operating value of described energy-absorbing unit, energy-absorbing unit conducting dissipative system energy, finally open described charge switch to cut off remaining oscillating current.
Wherein, when cutting off rated current, disconnect described charge switch, described pre-charge module gives described commutation capacitor precharge, after closed described charge switch, described commutation capacitor and described vice-side winding form high frequency oscillating current and superpose with the rated current in described high-speed switch with generation current zero point, and current transfer is described commutation capacitor extremely, when the voltage rise of described commutation capacitor is to the operating value of described energy-absorbing unit, described energy-absorbing unit conducting dissipative system energy.
Wherein, by controlling the position of former limit winding and vice-side winding Same Name of Ends, when making to break down, the faradic direction of described vice-side winding is identical with fault current direction, realize the automatic charging to described commutation capacitor, thus can the fault current of quick-speed turning on-off any direction, simultaneously high without the need to insulating requirements, bulky precharge device.
In the utility model embodiment, charge switch is used for energy-absorbing unit conducting and opens after dissipative system energy to cut off remaining oscillating current, simultaneously for controlling the charging process of the described commutation capacitor cut off before rated current, the combined floodgate of charge switch and opening velocity are all without strict demand, therefore common AC circuit breaker can be used, without the need to high speed trigger switch reliably.
In the utility model embodiment, to commutation capacitor precharge when pre-charge module is only for cutting off rated current, relative to all needing when disengagement failure electric current and rated current commutation capacitor precharge, significantly reduce the insulating requirements of pre-charge module, volume and cost.
In the utility model embodiment, mutual reactor unit can be the iron core mutual reactor of similar transformer, also can be the form that hollow coupling reactor or smoothing reactor add coupling coil.
As an embodiment of the present utility model, high-speed switch can be single high-speed switch, also can be being sequentially connected in series of N number of identical described high-speed switch, N be more than or equal to 1 integer; When N is greater than 1, each high-speed switch RC in parallel all presses branch road.
In the utility model embodiment, automatic charging type high voltage DC breaker can carry out series connection and use, and to realize the modularization of high voltage DC breaker, meets the demand of different voltage levels direct current transmission system flexibly.
In the utility model embodiment, high-speed switch power module comprises m insulating transformer unit, and each insulating transformer unit comprises the iron core T of segmentation serial connection, is wrapped in the vice-side winding of a former limit winding on described iron core and multiple mutually insulated; Described former limit winding switching is in the high-frequency electrical energy end by civil power inversion, and described multiple vice-side winding is connected with the operating mechanism feeder ear in high-speed switch described in each respectively, m be more than or equal to 1 integer.
Zero passage high voltage DC breaker forced by the automatic charging type provided in order to further description the utility model embodiment, and existing details are as follows with specific embodiment by reference to the accompanying drawings:
As shown in Figure 1, the theory diagram of zero passage high voltage DC breaker forced by the automatic charging type that the utility model embodiment provides, and comprises high-speed switch unit 10, energy-absorbing unit 20, mutual reactor unit 30, commutation capacitor unit 40, first isolating switch 51 and the second isolating switch 52; Mutual reactor unit 30 comprises former limit winding 31 and vice-side winding 32; First isolating switch 51 is sequentially connected in series with high-speed switch unit 10, former limit winding 31, second isolating switch 52, high-speed switch unit 10 and energy-absorbing unit 20 are connected in parallel, one end of commutation capacitor unit 40 and a of high-speed switch unit 10 hold and to be connected and the other end is held with the f of vice-side winding 32 and is connected, and the e end of vice-side winding 32 is held with the b of high-speed switch unit 10 and is connected.
The high-speed switch power module 12 that high-speed switch unit 10 comprises high-speed switch 11 and is connected with the feeder ear of high-speed switch 11; High-speed switch 11 is for the system voltage after bearing electric current and cut-offfing, and high-speed switch power module 12 provides power supply for giving the operating mechanism in high-speed switch 11;
Energy-absorbing unit 20 is cut off for absorbing fault current the voltage-limiting protection that energy that inductive element in rear electric power system stores realizes high-speed switch 11;
Coupling fault current flowing circuit and commutation capacitor unit 40 place branch road when mutual reactor unit 30 is for breaking down; By the former limit winding of control mutual reactor unit 30 and the position of vice-side winding Same Name of Ends, when making to break down, the faradic direction of described mutual reactor unit secondary is identical with fault current direction, realize the automatic charging to commutation capacitor, thus can the fault current of quick-speed turning on-off any direction, simultaneously high without the need to insulating requirements, bulky precharge device.
Commutation capacitor unit 40 comprises the charge switch 43 and commutation capacitor 41 that are sequentially connected in series, and the pre-charge module 42 be connected with commutation capacitor 41 charging end; Commutation capacitor 41 is for vibrating with vice-side winding 32; To commutation capacitor 41 precharge when pre-charge module 42 is for cut-offfing rated current; Disconnect when charge switch 43 is for cut-offfing rated current, commutation capacitor 41 is charged smoothly, and oscillating current remaining after cutting off energy absorbing component dissipative system energy; First isolating switch 51 and the second isolating switch 52 protect DC circuit breaker for disconnecting after electric current excises completely.Giving described commutation capacitor precharge when wherein pre-charge module 42 is only for cutting off rated current, relative to all needing described commutation capacitor precharge when disengagement failure electric current and rated current, significantly reducing the insulating requirements of pre-charge module, volume and cost.
As shown in Figure 2, the physical circuit figure of zero passage high voltage DC breaker forced by the automatic charging type that the utility model embodiment provides, first isolating switch K1 connects successively with high-speed switch CB, former limit winding L 1, second isolating switch K2, energy-absorbing unit MOV is in parallel with high-speed switch CB, charge switch K3 connects successively with commutation capacitor C, vice-side winding L2, and one end is connected with high-speed switch CB input, the other end is connected with high-speed switch CB output.
High-speed switch CB is for the system voltage after bearing electric current and cut-offfing; Energy-absorbing unit MOV is cut off for absorbing fault current the voltage-limiting protection that energy that inductive element in rear electric power system stores realizes high-speed switch CB; Coupling fault current flowing circuit and commutation capacitor unit C place branch road when mutual reactor unit is used for breaking down; Commutation capacitor C is used for being formed with vice-side winding L2 vibrating; Major loop isolating switch K1 and K2 is used for disconnecting protecting DC circuit breaker after electric current excises completely.
Specific works mode is as follows: when normally working, and line current flows through the first isolating switch K1, high-speed switch CB, former limit winding L 1 and the second isolating switch K2, when either direction is short-circuited fault, also there is arcing in high-speed switch CB disjunction at once, fault current in former limit winding L 1 rises and the magnetic field that changes gradually, induced current is produced in vice-side winding L2, induced current and fault current equidirectional with the automatic charging realized commutation capacitor C, discharged by vice-side winding L2 after commutation capacitor C charging complete, discharging current and fault current are oppositely and superpose generation current zero point, high-speed switch CB blow-out, electric current is all transferred to commutation capacitor C and vice-side winding L2 branch road, when high-speed switch CB both end voltage reaches the operating value of energy-absorbing unit MOV, energy-absorbing unit MOV conducting dissipative system energy, finally open charge switch K3 to cut off remaining oscillating current, open the first isolating switch K1 and the second isolating switch K2, to protect DC circuit breaker.
When cutting off rated current; turn off charge switch K3; commutation capacitor C precharge; after closed charge switch K3; commutation capacitor C and vice-side winding L2 form high frequency oscillating current and superpose with the rated current in high-speed switch CB with generation current zero point; current transfer is to commutation capacitor C; when the voltage rise of commutation capacitor C is to the operating value of energy-absorbing unit MOV; energy-absorbing unit MOV conducting dissipative system energy; finally open charge switch K3 to cut off remaining oscillating current; open the first isolating switch K1 and the second isolating switch K2, to protect DC circuit breaker.
As shown in Figure 3, the physical circuit figure that the automatic charging type that the utility model embodiment provides forces the multi-break series connection of zero passage high voltage DC breaker to use, N number of high-speed switch CB is sequentially connected in series, and one end is connected with the first isolating switch K1, the other end is connected with the second isolating switch K2 by former limit winding L 1, each high-speed switch CB energy-absorbing unit MOV in parallel and all press branch road, all a pressure routing resistance R0 and electric capacity C0 is formed, charge switch K3 and commutation capacitor C, vice-side winding L2 connects successively, and one end is connected with N number of high-speed switch CB input of connecting successively, the other end is connected with N number of high-speed switch CB output of connecting successively, N be more than or equal to 1 integer.
Specific works mode is as follows: when normally working, and line current flows through the first isolating switch K1, N number of high-speed switch CB, former limit winding L 1 and the second isolating switch K2 connected successively, when either direction is short-circuited fault, also there is arcing in N number of high-speed switch CB connected successively disjunction simultaneously at once, fault current in former limit winding L 1 rises and the magnetic field that changes gradually, induced current is produced in vice-side winding L2, induced current and fault current equidirectional with the automatic charging realized commutation capacitor C, discharged by vice-side winding L2 after commutation capacitor C charging complete, discharging current and fault current are oppositely and superpose generation current zero point, high-speed switch CB blow-out, electric current is all transferred to commutation capacitor C and vice-side winding L2 branch road, when high-speed switch CB both end voltage reaches the operating value of energy-absorbing unit MOV, energy-absorbing unit MOV conducting dissipative system energy, finally open charge switch K3 to cut off remaining oscillating current, open the first isolating switch K1 and the second isolating switch K2, to protect DC circuit breaker, when cutting off rated current, turn off charge switch K3, commutation capacitor C precharge, after closed charge switch K3, commutation capacitor C and vice-side winding L2 form high frequency oscillating current and superpose with the rated current in high-speed switch CB with generation current zero point, current transfer is to commutation capacitor C, when the voltage rise of commutation capacitor C is to the operating value of energy-absorbing unit MOV, energy-absorbing unit MOV conducting dissipative system energy, finally open charge switch K3 to cut off remaining oscillating current, open the first isolating switch K1 and the second isolating switch K2, to protect DC circuit breaker.
As shown in Figure 4, the physical circuit figure that the automatic charging type that the utility model embodiment provides forces the multimode series connection of zero passage high voltage DC breaker to use, comprise the first isolating switch K1, second isolating switch K2 and N number of DC circuit breaker submodule, DC circuit breaker submodule comprises the high-speed switch CB be connected in parallel, RC all presses branch road and MOV energy-absorbing branch road, and commutation capacitor unit and mutual reactor, commutation capacitor unit comprises and is sequentially connected in series charge switch K3 and commutation capacitor C, charge switch K3 and commutation capacitor C, vice-side winding L2 connects successively, and one end is connected with high-speed switch CB input, the other end is connected with high-speed switch CB output, N be more than or equal to 1 integer.
Specific works mode is as follows: when normally working, and line current flows through high-speed switch CB in isolating switch K1, N number of DC circuit breaker submodule of connecting successively and former limit winding L 1, when either direction is short-circuited fault, also there is arcing in the disjunction simultaneously at once of the high-speed switch CB in N number of DC circuit breaker submodule of connecting successively, fault current in former limit winding L 1 rises and the magnetic field that changes gradually, induced current is produced in vice-side winding L2, induced current and fault current equidirectional with the automatic charging realized commutation capacitor C, discharged by vice-side winding L2 after commutation capacitor C charging complete, discharging current and fault current are oppositely and superpose generation current zero point, high-speed switch CB blow-out, electric current is all transferred to commutation capacitor C and vice-side winding L2 branch road, when high-speed switch CB both end voltage reaches the operating value of energy-absorbing unit MOV, energy-absorbing unit MOV conducting dissipative system energy, finally open charge switch K3 to cut off remaining oscillating current, open the first isolating switch K1 and the second isolating switch K2, to protect DC circuit breaker, when cutting off rated current, turn off charge switch K3, commutation capacitor C precharge, after closed charge switch K3, commutation capacitor C and vice-side winding L2 form high frequency oscillating current and superpose with the rated current in high-speed switch CB with generation current zero point, current transfer is to commutation capacitor C, when the voltage rise of commutation capacitor C is to the operating value of energy-absorbing unit MOV, energy-absorbing unit MOV conducting dissipative system energy, finally open charge switch K3 to cut off remaining oscillating current, open the first isolating switch K1 and the second isolating switch K2, to protect DC circuit breaker.
The utility model is swift in motion to high voltage DC breaker itself meeting direct current system, cut-off big current and bear on high-tension basis, be coupled with commutation capacitor unit place branch road by mutual reactor unit fault current circulated circuit, make it possible to the fault current cut-offfing any direction, and without the need to precharge device, without the need to dropping into the high speed trigger switch of commutation capacitor place branch road fast, thus solve existing pressure zero-based high voltage DC breaker and be difficult to meet the functions such as bi-directional failure electric current cut-offs, precharge device volume is large, the trigger switch of change of current branch road requires high and controls the problems such as complicated.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
Claims (8)
1. zero passage high voltage DC breaker forced by an automatic charging type, it is characterized in that, comprise high-speed switch unit (10), energy-absorbing unit (20), mutual reactor unit (30), commutation capacitor unit (40), the first isolating switch (51) and the second isolating switch (52);
Described mutual reactor unit (30) comprises former limit winding (31) and vice-side winding (32);
Described first isolating switch (51), described high-speed switch unit (10), described former limit winding (31) and described second isolating switch (52) are sequentially connected in series;
Described energy-absorbing unit (20) and described high-speed switch unit (10) are connected in parallel;
Described commutation capacitor unit (40) is connected in parallel with described energy-absorbing unit (20) after connecting with described vice-side winding (32) again.
2. zero passage high voltage DC breaker forced by automatic charging type as claimed in claim 1, it is characterized in that, described commutation capacitor unit (40) comprises commutation capacitor (41), pre-charge module (42) and charge switch (43);
Described charge switch (43) and described commutation capacitor (41) are connected in series, the non-series connection link of described commutation capacitor (41) is used for being connected with described vice-side winding (32), and described commutation capacitor (41) is for vibrating with described vice-side winding (32);
The non-series connection link of described charge switch (43) is used for being connected with the link of described first isolating switch (51) and described high-speed switch unit (10); Described charge switch (43) for when opening to cut off remaining oscillating current after described energy-absorbing unit (20) dissipative system energy, and controlled the charging process of described commutation capacitor (41) before cutting off rated current;
Described pre-charge module (42) is connected to the charging end of described commutation capacitor (41), for giving described commutation capacitor (41) precharge when cut-offfing rated current.
3. zero passage high voltage DC breaker forced by automatic charging type as claimed in claim 2, it is characterized in that, the high-speed switch power module (12) that described high-speed switch unit (10) comprises high-speed switch (11) and is connected with the feeder ear of described high-speed switch (11);
Described high-speed switch (11) is for the system voltage after bearing electric current and cut-offfing, and described high-speed switch power module (12) provides power supply for giving the operating mechanism in described high-speed switch (11).
4. zero passage high voltage DC breaker forced by automatic charging type as claimed in claim 3, and it is characterized in that, described high-speed switch (11) is single high-speed switch or N number of high-speed switch be sequentially connected in series; N be greater than 1 positive integer.
5. zero passage high voltage DC breaker forced by automatic charging type as claimed in claim 3, it is characterized in that, when the short trouble of either direction occurs, also there is arcing in described high-speed switch (11) disjunction at once, fault current in described former limit winding (31) rises and the magnetic field that changes gradually, induced current is produced in described vice-side winding (32), induced current and fault current equidirectional with the automatic charging realized described commutation capacitor (41), by described vice-side winding (32) electric discharge after described commutation capacitor (41) charging complete, discharging current and fault current are oppositely and superpose generation current zero point, described high-speed switch (11) blow-out, electric current is all transferred to described commutation capacitor (41) and described vice-side winding (32) branch road, when described high-speed switch (11) both end voltage reaches the operating value of described energy-absorbing unit (20), (20) conducting of described energy-absorbing unit dissipative system energy, open described charge switch (43) to cut off remaining oscillating current.
6. zero passage high voltage DC breaker forced by automatic charging type as claimed in claim 3, it is characterized in that, when cutting off rated current, disconnect described charge switch (43), described pre-charge module (42) is to described commutation capacitor (41) precharge, after closed described charge switch (43), described commutation capacitor (41) and described vice-side winding (32) form high frequency oscillating current and superpose with the rated current in described high-speed switch (11) with generation current zero point, current transfer is to described commutation capacitor (41), when the voltage rise of described commutation capacitor (41) is to the operating value of described energy-absorbing unit (20), (20) conducting of described energy-absorbing unit dissipative system energy.
7. zero passage high voltage DC breaker forced by automatic charging type as claimed in claim 3, it is characterized in that, without the need to described commutation capacitor (41) precharge during disengagement failure electric current, realized the automatic charging of described commutation capacitor (41) by described mutual reactor unit (30); Need precharge device when only cutting off rated current, reduce volume and the cost of precharge device.
8. zero passage high voltage DC breaker forced by automatic charging type as claimed in claim 1, it is characterized in that, described mutual reactor unit (30) adds the form of coupling coil for iron core mutual reactor, hollow coupling reactor or smoothing reactor.
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| CN201520829707.3U CN205160029U (en) | 2015-10-21 | 2015-10-21 | Automatic chargeable type forces zero passage high voltage direct current circuit breaker |
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| CN201520829707.3U CN205160029U (en) | 2015-10-21 | 2015-10-21 | Automatic chargeable type forces zero passage high voltage direct current circuit breaker |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186443A (en) * | 2015-10-21 | 2015-12-23 | 华中科技大学 | Automatic-charging forced zero-crossing high-voltage direct-current breaker |
| CN109768712A (en) * | 2018-11-30 | 2019-05-17 | 武汉华中数控股份有限公司 | Reactor branch and PWM energy feedback unit |
| CN110678951A (en) * | 2017-06-16 | 2020-01-10 | 东芝能源系统株式会社 | DC circuit breaker, mechanical breaking device for DC circuit breaker, and semiconductor breaking device for DC circuit breaker |
-
2015
- 2015-10-21 CN CN201520829707.3U patent/CN205160029U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186443A (en) * | 2015-10-21 | 2015-12-23 | 华中科技大学 | Automatic-charging forced zero-crossing high-voltage direct-current breaker |
| CN105186443B (en) * | 2015-10-21 | 2018-03-20 | 华中科技大学 | A kind of automatic charging type forces zero passage high voltage DC breaker |
| CN110678951A (en) * | 2017-06-16 | 2020-01-10 | 东芝能源系统株式会社 | DC circuit breaker, mechanical breaking device for DC circuit breaker, and semiconductor breaking device for DC circuit breaker |
| CN110678951B (en) * | 2017-06-16 | 2021-09-21 | 东芝能源系统株式会社 | DC circuit breaker, mechanical breaking device for DC circuit breaker, and semiconductor breaking device for DC circuit breaker |
| CN109768712A (en) * | 2018-11-30 | 2019-05-17 | 武汉华中数控股份有限公司 | Reactor branch and PWM energy feedback unit |
| CN109768712B (en) * | 2018-11-30 | 2021-02-02 | 武汉华中数控股份有限公司 | Reactor shunt circuit and PWM energy feedback unit |
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