CN103441489B - A kind of MTDC transmission system DC circuit breaker and control method thereof - Google Patents
A kind of MTDC transmission system DC circuit breaker and control method thereof Download PDFInfo
- Publication number
- CN103441489B CN103441489B CN201310359263.7A CN201310359263A CN103441489B CN 103441489 B CN103441489 B CN 103441489B CN 201310359263 A CN201310359263 A CN 201310359263A CN 103441489 B CN103441489 B CN 103441489B
- Authority
- CN
- China
- Prior art keywords
- thyristor
- circuit breaker
- diode
- interruption units
- auxiliary switching
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000005540 biological transmission Effects 0.000 title claims abstract description 16
- 102100024841 Protein BRICK1 Human genes 0.000 claims description 18
- 101710084314 Protein BRICK1 Proteins 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 12
- 239000003990 capacitor Substances 0.000 claims description 8
- 230000000903 blocking effect Effects 0.000 claims description 5
- 238000012546 transfer Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The present invention discloses a kind of MTDC transmission system DC circuit breaker and control method thereof, and circuit breaker comprises lightning arrester, main switch branch road and auxiliary switching circuit; Lightning arrester and main switch branch circuit parallel connection; Main switch branch road comprises the interruption units of the identical series connection of two groups of structures, often organizes DC load switch and thyristor valve section that interruption units includes series connection.Often organize interruption units two ends, be arranged in parallel the auxiliary switching circuit that structure is identical.Often organize auxiliary switching circuit and include thyristor-reactance series arm, diode, electric capacity and resistance.Diodes in parallel is at interruption units two ends, and thyristor-reactance series arm and electric capacity are connected in diode two ends over the ground, and pass through grounding through resistance.The present invention makes main switch branch road direct current zero passage carry out disjunction by the method injecting reverse current, then uses the DC load switch in DC circuit breaker structure to carry out disjunction for load current.
Description
Technical field
The invention belongs to electric and electronic technical field, be specifically related to a kind of MTDC transmission system DC circuit breaker and control method thereof.
Background technology
Multi-terminal HVDC transmission technology can realize multiple feed, many drop points are powered, is a kind of flexible, quick, economic power transmission mode, meets the growth requirement of power industry.DC circuit breaker is a kind of very important equipment in multi-terminal HVDC transmission engineering, in MTDC transmission system, adopt DC circuit breaker just can give full play to the characteristics and advantages of MTDC transmission system, but DC circuit breaker breaking direct current process to bear voltage high, need the energy of absorption large especially, it is fast that speed is cut-off in requirement, reliability is high, and needs to cut-off bidirectional current.At present, some scholars are studying the DC circuit breaker of its correspondence.
Summary of the invention
For the deficiencies in the prior art, the present invention proposes a kind of MTDC transmission system DC circuit breaker and control method thereof, core is the mode disjunction direct current adopting superposition reverse current based on current commutation principle, achieve the two-way disjunction of electric current, the development for DC circuit breaker provides a fine technical strategies.
A kind of MTDC transmission system DC circuit breaker provided by the invention, its improvements are, comprise lightning arrester, main switch branch road and auxiliary switching circuit; Described lightning arrester and described main switch branch circuit parallel connection;
It is in series that described main switch props up route two groups of identical interruption units of structure, is respectively the first interruption units and the second interruption units; Described first interruption units comprises the first DC load switch and first thyristor valve section of series connection; Described first DC load switch comprises AC circuit breaker BRK1 in parallel and a LC series arm; Described second interruption units comprises the second DC load switch and second thyristor valve section of series connection; Described second DC load switch comprises AC circuit breaker BRK2 in parallel and the 2nd LC series arm;
At described first interruption units two ends the first auxiliary switching circuit in parallel; At described second interruption units two ends the second auxiliary switching circuit in parallel;
Described first auxiliary switching circuit comprises thyristor T12-reactance L2 series arm, diode D1, electric capacity C1 and resistance R1; Described diode D1 is connected in parallel on described first interruption units two ends; Described thyristor T12-reactance L2 series arm and described electric capacity C1 are connected in described diode D1 two ends over the ground, and by described resistance R1 ground connection;
Described second auxiliary switching circuit comprises thyristor T22-reactance L1 series arm, diode D2, electric capacity C2 and resistance R2; Described diode D2 is connected in parallel on described second interruption units two ends; Described thyristor T22-reactance L1 series arm and described electric capacity C2 are connected in described diode D2 two ends over the ground, and by described resistance R2 ground connection.
Wherein, a described LC series arm comprises electric capacity C3 and the reactance L3 of series connection; Described 2nd LC series arm comprises electric capacity C4 and the reactance L4 of series connection.
Wherein, described first thyristor valve section comprises thyristor T1, thyristor T11, diode D11 and resistance R3; Diode D11 is in parallel with described thyristor T1 and described thyristor T11 respectively after connecting with described resistance R3; Described thyristor T1 and thyristor T11 is inverse parallel structure; Described diode D11 is contrary with described diode D1 direction;
Described second thyristor valve section comprises thyristor T2, thyristor T21, diode D21 and resistance R4; Diode D21 is in parallel with described thyristor T2 and described thyristor T21 respectively after connecting with described resistance R4; Described thyristor T2 and thyristor T21 is inverse parallel structure; Described diode D21 is contrary with described diode D2 direction.
Wherein, in described first auxiliary switching circuit, the anode of described thyristor T12 is connected with the negative pole of described diode D1, and its negative electrode is connected with one end of described reactance L2; Described electric capacity C1 one end is connected with the positive pole of described diode D1; The described electric capacity C1 other end is connected with the other end of described reactance L2; Described reactance L2 is by described resistance R1 ground connection;
In described second auxiliary switching circuit, the anode of described thyristor T22 is connected with the negative pole of described diode D2, and its negative electrode is connected with one end of described reactance L1; Described electric capacity C2 one end is connected with the positive pole of described diode D2; The described electric capacity C2 other end is connected with the other end of described reactance L1; Described reactance L1 is by described resistance R2 ground connection.
Wherein, the described diode D1 in described first auxiliary switching circuit and the number of described thyristor T12 are two or more;
Described diode D2 in described second auxiliary switching circuit and the number of described thyristor T22 are two or more.
Wherein, the diode D2 negative pole in the diode D1 in described first auxiliary switching circuit and described second auxiliary switching circuit connects, and positive pole is connected with the current limiting reactor in circuit.
The present invention is based on the control method of a kind of MTDC transmission system DC circuit breaker that another object provides, its improvements are, described method comprises the steps:
(1) by DC circuit breaker line attachment, and keep thyristor T1, thyristor T2, thyristor T11, thyristor T21, thyristor T12 and thyristor T22 to be blocking, AC circuit breaker BRK1 and AC circuit breaker BRK2 is open mode, and capacitor charging is to rated voltage;
(2) DC circuit breaker is opened;
(3) when breaking down, judging the current type in circuit, is fault current or DC load electric current;
(4) according to different current type, DC circuit breaker turns off in different ways.
Wherein, step (2) opening process to DC circuit breaker comprises:
1) when opening, the AC circuit breaker BRK2 in closed second interruption units;
2) the thyristor T21 of the second interruption units described in triggering and conducting;
3) the AC circuit breaker BRK1 in closed first interruption units;
4) the thyristor T11 in the first interruption units described in conducting.
Wherein, step (4), according to current type, is carried out shutoff to DC circuit breaker and is controlled, comprising:
For fault current:
1. the thyristor T22 in triggering and conducting second auxiliary switching circuit;
2. the described AC circuit breaker BRK2 in described second interruption units is opened;
3. lightning arrestor movement absorb energy;
4. the AC circuit breaker BRK1 in described first interruption units is disconnected;
For DC load electric current:
I) the described AC circuit breaker BRK2 in described second interruption units is disconnected;
Ii) lightning arrestor movement absorb energy.
Wherein, step (2) opening process to DC circuit breaker comprises:
When 1> opens, the AC circuit breaker BRK1 in closed first interruption units;
The thyristor T1 of the second interruption units described in 2> triggering and conducting;
3> closes the AC circuit breaker BRK2 in the second interruption units;
Thyristor T2 in second interruption units described in 4> conducting.
Wherein, step (4), according to current type, is carried out shutoff to DC circuit breaker and is controlled, comprising:
For fault current:
A) the thyristor T12 in triggering and conducting first auxiliary switching circuit;
B) the described AC circuit breaker BRK1 in described first interruption units is opened;
C) lightning arrestor movement absorb energy;
D) the AC circuit breaker BRK2 in described second interruption units is disconnected;
For DC load electric current:
I) the described AC circuit breaker BRK1 in described first interruption units is disconnected;
II) lightning arrestor movement absorb energy.
Compared with the prior art, beneficial effect of the present invention is:
Present invention incorporates forced commutation thought and current transfer disjunction thought, achieve the disjunction of hicap direct current.
The present invention adopts half control type device thyristor to form direct-current breaker topology, and utilize half control type device to replace expensive wholly-controled device, on-state loss is low, manufacturing cost and cooling requirements lower, technology maturation.
The present invention can be applicable to high-voltage great-current occasion, and topological structure is simply compact, and control simple and easy, extensibility is high.
The present invention's application quick isolation switch, achieve the disjunction of multi-state bidirectional, dc electric current, breaking course is quick without arc.
The present invention utilizes auxiliary switching circuit to achieve the soft open-minded of DC circuit breaker, reduces the stress that power device opening process bears.
The present invention takes the lead in by DC load switch application in DC circuit breaker, and direct current when directly can complete load current operating mode cuts off and conversion, strengthens the useful life of DC circuit breaker, increases its reliability.
The invention belongs to mixed type high voltage DC breaker, combine mechanical type DC circuit breaker and the advantage both solid-state direct-current circuit breaker, research and development difficulty is relatively little, is applicable to various MTDC transmission system.
The present invention utilizes circuit for capacitor charging in auxiliary switching circuit, does not need additionally to increase charging device, thus reduces equipment room electrical isolation difficulty, reduce floor space and cost, be easy to through engineering approaches and realize.
Accompanying drawing explanation
Fig. 1 is DC circuit breaker structure chart provided by the invention.
Fig. 2 is the waveform schematic diagram of disjunction fault current provided by the invention.
Fig. 3 is the waveform schematic diagram of disjunction load current provided by the invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
A kind of MTDC transmission system DC circuit breaker that the present embodiment proposes, it is connected respectively after current limiting reactor by two ends and accesses electrical network, and its structure as shown in Figure 1, comprises lightning arrester and main switch branch road and auxiliary switching circuit; Wherein lightning arrester and main switch branch circuit parallel connection.
In figure, main switch prop up the first identical interruption units of route two groups of structures and the second interruption units in series.First interruption units comprises the first DC load switch and first thyristor valve section of series connection; First DC load switch comprises high pressure SF in parallel
6circuit breaker BRK1 and by an electric capacity C3 and reactance L3 LC series arm in series; First thyristor valve section comprises thyristor T1, thyristor T11, diode D11 and resistance R3; Diode D11 is in parallel with thyristor T1 and thyristor T11 respectively after connecting with resistance R3; Thyristor T1 and thyristor T11 is inverse parallel structure; Diode D11 is contrary with diode D1 direction.Second interruption units comprises the second DC load switch and second thyristor valve section of series connection; Second DC load switch comprises high pressure SF in parallel
6circuit breaker BRK2 and by electric capacity C4 and reactance L4 the 2nd LC series arm in series; Second thyristor valve section comprises thyristor T2, thyristor T21, diode D21 and resistance R4; Diode D21 is in parallel with thyristor T2 and thyristor T21 respectively after connecting with resistance R4; Thyristor T2 and thyristor T21 is inverse parallel structure; Diode D21 is contrary with diode D2 direction.
The present embodiment is the first auxiliary switching circuit in parallel at the first interruption units two ends, the second auxiliary switching circuit in parallel at the second interruption units two ends.
As shown in Figure 1, the first auxiliary switching circuit comprises thyristor T12-reactance L2 series arm, diode D1, electric capacity C1 and resistance R1; Diode D1 is connected in parallel on the first interruption units two ends; Thyristor T12-reactance L2 series arm and electric capacity C1 are connected in diode D1 two ends over the ground, and by resistance R1 ground connection.
Second auxiliary switching circuit comprises thyristor T22-reactance L1 series arm, diode D2, electric capacity C2 and resistance R2; Described diode D2 is connected in parallel on described second interruption units two ends; Described thyristor T22-reactance L1 series arm and described electric capacity C2 are connected in described diode D2 two ends over the ground, and by described resistance R2 ground connection.
In the first auxiliary switching circuit, diode D1 comprises the diode (only by a sign in figure) of at least two series aiding connections, and it is connected in parallel on the first interruption units two ends, and direction is contrary with the diode D11 direction in the first thyristor valve section.Thyristor T12 is also made up of the Thyristors in series of at least two, and its anode is connected with the thyristor T1 anode in the first interruption units, and the negative electrode of thyristor T12 is connected with reactance L2; The other end of reactance L2 is connected with one end of electric capacity C1, and the other end of electric capacity C1 is connected with the first direct current change over switch; By resistance R1 ground connection between reactance L2 and electric capacity C1, R1 plays metering function, and reactance L2 plays the effect of suppression short circuit current.
In the second auxiliary switching circuit, diode D2 comprises the diode (only by a sign in figure) of at least two series aiding connections, and it is connected in parallel on the second interruption units two ends, and direction is contrary with the diode D21 direction in the second thyristor valve section.Thyristor T22 is also made up of the Thyristors in series of at least two, and its anode is connected with the second direct current change over switch in the second interruption units, and the negative electrode of thyristor T22 is connected with reactance L1; The other end of reactance L1 is connected with one end of electric capacity C2, and the other end of electric capacity C2 is connected with the thyristor T2 anode in the second interruption units; By resistance R2 ground connection between reactance L1 and electric capacity C2, R2 plays metering function, and reactance L1 plays the effect of suppression short circuit current.
In the present embodiment, the diode D2 negative pole in the diode D1 in the first auxiliary switching circuit and described second auxiliary switching circuit connects, and positive pole is connected with the current limiting reactor in circuit.
Corresponding, the present embodiment proposes a kind of control method of MTDC transmission system DC circuit breaker, because this breaker structure is symmetrical, bidirectional flow alive disjunction mechanism is identical, only get forward and do principle analysis, in the other direction can analogy, sense of current I shown in accompanying drawing 1
dcfor the positive direction of electric current.To DC circuit breaker under different operating mode open and breaking course is described:
Operating mode 1: disjunction fault current
Opening process:
Electric capacity C1 and C2 utilizes circuit charged by auxiliary switching circuit C1-R and C2-R and keep normal electriferous state, and voltage stabilization is at system nominal voltage levvl.Closed SF6 circuit breaker BRK2, now system dc electric current flows through D1-BRK2-D21-R2 branch road then triggering and conducting T21, and because D21 is many Diode series, impedance is much larger than isolating valve branch road, therefore electric current transfers to rapidly T21 branch road; Then closed SF6 circuit breaker BRK1 conducting T11 due to D11 be also many Diode series, impedance is much larger than T11 branch road, then electric current transfers to rapidly BRK1-T11-BRK2-T21 branch road, stable and the electric capacity C1 of circuit breaker current to be passed through and C2 voltage all stable after, system enters steady operation, so far DC circuit breaker opening process terminates, and electric capacity C1 and C2 voltage direction are upper just lower negative, identical with direction as shown.
Breaking course:
When needs DC circuit breaker disjunction line fault electric current, triggering and conducting T22, due to the effect of capacitance voltage, capacitor C2 forms in T21-BRK2-T22-inductance L 2 pulse current that in loop, generation one is reverse with circuit forward current rapidly, make current over-zero in thyristor T21, because D2 conducting provides reverse voltage to T21, thyristor T21 turns off, separating brake SF6 circuit breaker BRK2 under no current state; When SF6 circuit breaker BRK2 recovers after blocking ability, electric current transfers to BRK1-T11-T22-L2-C2 branch road completely, charge to capacitor C2 simultaneously, makes capacitor C2 voltage negatively just to become under upper bearing just down from upper, contrary with direction as shown.When BRK1-T11-T22-L2-C2 branch voltage reaches lightning arrester MOV operation voltage, lightning arrester MOV action, electric current shifts to lightning arrester MOV place branch road, when capacitor C2 charging current is zero, electric current transfers to MOV branch road completely, by the energy stored in lightning arrester MOV absorption circuit and current-limiting inductance, thyristor T22 turns off, SF6 circuit breaker BRK1 separating brake, treat that in lightning arrester, electric current is decreased to 0 gradually, lightning arrester recovers blocking state, and the complete disjunction of current through line circuit breaker current, so far turn off process terminates.
Operating mode 2: disjunction steady-state DC load current
Opening process:
Electric capacity C1 and C2 utilizes circuit charged by auxiliary switching circuit C1-R and C2-R and keep normal electriferous state, and voltage stabilization is at system nominal voltage levvl.Closed SF6 circuit breaker BRK2, now system dc electric current flows through D1-BRK2-D21-R2 branch road then triggering and conducting T21, and because D21 is many Diode series, impedance is much larger than isolating valve branch road, therefore electric current transfers to rapidly T21 branch road; Then closed SF6 circuit breaker BRK1 conducting T11 due to D11 be also many Diode series, impedance is much larger than T11 branch road, then electric current transfers to rapidly BRK1-T11-BRK2-T21 branch road, stable and the electric capacity C1 of circuit breaker current to be passed through and C2 voltage all stable after, system enters steady operation, so far DC circuit breaker opening process terminates, and electric capacity C1 and C2 voltage direction are upper just lower negative, identical with direction as shown.
Breaking course:
When needs cutting system steady-state DC load current, can directly pass through the action of direct current change over switch to cut off load current.Separating brake SF6 circuit breaker BRK2, the LC branch road of its parallel connection can make SF6 circuit breaker BRK2 branch current occur zero crossing and separating brake to SF6 circuit breaker BRK2 branch road superposition self-oscillation electric current, system power starts the capacitor charging of the LC branch road to its parallel connection afterwards, when capacitance voltage reaches lightning arrester MOV operation voltage, MOV action, electric current all transfers to MOV place branch road, the energy stored in MOV absorption circuit and current-limiting inductance, treat that in lightning arrester, electric current is decreased to 0 gradually, lightning arrester recovers blocking state, so far current through line circuit breaker meet the complete disjunction of electric current, turn off process terminates.
As shown in Figure 2, be the waveform schematic diagram of disjunction fault current.By the manipulation of DC circuit breaker proposed the present embodiment, as can be seen from the figure, through the disjunction of 1.4ms main branch road direct current, ultimate current is transferred to lightning arrester and carries out energy dissipation.
As shown in Figure 3, be the waveform schematic diagram of disjunction load current.By the manipulation of DC circuit breaker proposed the present embodiment, as can be seen from the figure, through the disjunction of 1.3ms main branch road direct current, ultimate current is transferred to lightning arrester and carries out energy dissipation.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or equivalent replacement, and not departing from any amendment of spirit and scope of the invention or equivalent replacement, it all should be encompassed in the middle of right of the present invention.
Claims (10)
1. a MTDC transmission system DC circuit breaker, is characterized in that, comprises lightning arrester, main switch branch road and auxiliary switching circuit; Described lightning arrester and described main switch branch circuit parallel connection;
It is in series that described main switch props up route two groups of identical interruption units of structure, is respectively the first interruption units and the second interruption units; Described first interruption units comprises the first DC load switch and first thyristor valve section of series connection; Described first DC load switch comprises AC circuit breaker BRK1 in parallel and a LC series arm; Described second interruption units comprises the second DC load switch and second thyristor valve section of series connection; Described second DC load switch comprises AC circuit breaker BRK2 in parallel and the 2nd LC series arm;
At described first interruption units two ends the first auxiliary switching circuit in parallel; At described second interruption units two ends the second auxiliary switching circuit in parallel;
Described first auxiliary switching circuit comprises thyristor T12-reactance L2 series arm, diode D1, electric capacity C1 and resistance R1; Described diode D1 is connected in parallel on described first interruption units two ends; Described thyristor T12-reactance L2 series arm and described electric capacity C1 are connected in described diode D1 two ends over the ground, and by described resistance R1 ground connection;
Described second auxiliary switching circuit comprises thyristor T22-reactance L1 series arm, diode D2, electric capacity C2 and resistance R2; Described diode D2 is connected in parallel on described second interruption units two ends; Described thyristor T22-reactance L1 series arm and described electric capacity C2 are connected in described diode D2 two ends over the ground, and by described resistance R2 ground connection;
Described first thyristor valve section comprises thyristor T1, thyristor T11, diode D11 and resistance R3; Diode D11 is in parallel with described thyristor T1 and described thyristor T11 respectively after connecting with described resistance R3; Described thyristor T1 and thyristor T11 is inverse parallel structure; Described diode D11 is contrary with described diode D1 direction;
Described second thyristor valve section comprises thyristor T2, thyristor T21, diode D21 and resistance R4; Diode D21 is in parallel with described thyristor T2 and described thyristor T21 respectively after connecting with described resistance R4; Described thyristor T2 and thyristor T21 is inverse parallel structure; Described diode D21 is contrary with described diode D2 direction.
2. DC circuit breaker as claimed in claim 1, it is characterized in that, a described LC series arm comprises electric capacity C3 and the reactance L3 of series connection;
Described 2nd LC series arm comprises electric capacity C4 and the reactance L4 of series connection.
3. DC circuit breaker as claimed in claim 1, it is characterized in that, in described first auxiliary switching circuit, the anode of described thyristor T12 is connected with the negative pole of described diode D1, and its negative electrode is connected with one end of described reactance L2; Described electric capacity C1 one end is connected with the positive pole of described diode D1; The described electric capacity C1 other end is connected with the other end of described reactance L2; Described reactance L2 is by described resistance R1 ground connection;
In described second auxiliary switching circuit, the anode of described thyristor T22 is connected with the negative pole of described diode D2, and its negative electrode is connected with one end of described reactance L1; Described electric capacity C2 one end is connected with the positive pole of described diode D2; The described electric capacity C2 other end is connected with the other end of described reactance L1; Described reactance L1 is by described resistance R2 ground connection.
4. DC circuit breaker as claimed in claim 1, it is characterized in that, the described diode D1 in described first auxiliary switching circuit and the number of described thyristor T12 are two or more;
Described diode D2 in described second auxiliary switching circuit and the number of described thyristor T22 are two or more.
5. the DC circuit breaker as described in as arbitrary in claim 1-4, it is characterized in that, diode D2 negative pole in the negative pole of the diode D1 in described first auxiliary switching circuit and described second auxiliary switching circuit connects, and in the first auxiliary switching circuit, the positive pole of diode D1 is all connected with the current limiting reactor in circuit with the positive pole of the diode D2 in the second auxiliary switching circuit.
6. DC circuit breaker as claimed in claim 1, is characterized in that, logical following steps control described DC circuit breaker:
(1) by DC circuit breaker line attachment, and keep thyristor T1, thyristor T2, thyristor T11, thyristor T21, thyristor T12 and thyristor T22 to be blocking, AC circuit breaker BRK1 and AC circuit breaker BRK2 is open mode, and capacitor charging is to rated voltage;
(2) DC circuit breaker is opened;
(3) when breaking down, judging the current type in circuit, is fault current or DC load electric current;
(4) according to different current type, DC circuit breaker turns off in different ways.
7. DC circuit breaker as claimed in claim 6, it is characterized in that, step (2) opening process to DC circuit breaker comprises:
1) when opening, the AC circuit breaker BRK2 in closed second interruption units;
2) the thyristor T21 of the second interruption units described in triggering and conducting;
3) the AC circuit breaker BRK1 in closed first interruption units;
4) the thyristor T11 in the first interruption units described in conducting.
8. DC circuit breaker as claimed in claim 6, is characterized in that, step (4), according to current type, is carried out shutoff to DC circuit breaker and controlled, comprising:
For fault current:
1. the thyristor T22 in triggering and conducting second auxiliary switching circuit;
2. the described AC circuit breaker BRK2 in described second interruption units is opened;
3. lightning arrestor movement absorb energy;
4. the AC circuit breaker BRK1 in described first interruption units is disconnected;
For DC load electric current:
I) the described AC circuit breaker BRK2 in described second interruption units is disconnected;
Ii) lightning arrestor movement absorb energy.
9. DC circuit breaker as claimed in claim 6, it is characterized in that, step (2) opening process to DC circuit breaker comprises:
When 1> opens, the AC circuit breaker BRK1 in closed first interruption units;
The thyristor T1 of 2> triggering and conducting first interruption units;
3> closes the AC circuit breaker BRK2 in the second interruption units;
Thyristor T2 in 4> triggering and conducting second interruption units.
10. DC circuit breaker as claimed in claim 6, is characterized in that, step (4), according to current type, is carried out shutoff to DC circuit breaker and controlled, comprising:
For fault current:
A) the thyristor T12 in triggering and conducting first auxiliary switching circuit;
B) the described AC circuit breaker BRK1 in described first interruption units is opened;
C) lightning arrestor movement absorb energy;
D) the AC circuit breaker BRK2 in described second interruption units is disconnected;
For DC load electric current:
I) the described AC circuit breaker BRK1 in described first interruption units is disconnected;
II) lightning arrestor movement absorb energy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310359263.7A CN103441489B (en) | 2013-08-16 | 2013-08-16 | A kind of MTDC transmission system DC circuit breaker and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310359263.7A CN103441489B (en) | 2013-08-16 | 2013-08-16 | A kind of MTDC transmission system DC circuit breaker and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103441489A CN103441489A (en) | 2013-12-11 |
| CN103441489B true CN103441489B (en) | 2016-02-24 |
Family
ID=49695171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310359263.7A Active CN103441489B (en) | 2013-08-16 | 2013-08-16 | A kind of MTDC transmission system DC circuit breaker and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103441489B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104882877B (en) * | 2014-02-28 | 2017-12-01 | 西门子公司 | A kind of high voltage DC breaker |
| CN103928913B (en) * | 2014-03-31 | 2016-05-25 | 华中科技大学 | A kind of high voltage DC breaker based on rapid repulsion mechanism and insulating transformer |
| CN104242652B (en) * | 2014-09-17 | 2017-02-15 | 大连工业大学 | High-voltage direct current vacuum circuit breaker self-supplying power source topological structure based on modules connected in series |
| KR102021863B1 (en) * | 2015-05-13 | 2019-09-17 | 엘에스산전 주식회사 | Direct Current Circuit Breaker and Method Using The Same |
| CN105720552B (en) * | 2016-01-25 | 2019-05-31 | 华北电力大学 | A kind of current-limiting type high voltage DC breaker |
| CN107947535B (en) * | 2017-12-22 | 2024-02-20 | 清华四川能源互联网研究院 | Power electronic branch unit of ultrahigh voltage direct current circuit breaker |
| CN112383032B (en) * | 2020-09-30 | 2022-05-20 | 四川大学 | Thyristor-based active direct current breaker and control method thereof |
| CN114421420B (en) * | 2022-02-10 | 2023-05-30 | 华北电力大学（保定） | Resistance sensing type current-limiting multi-port direct current breaker suitable for flexible direct current distribution network |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101515710A (en) * | 2009-04-07 | 2009-08-26 | 东南大学 | Direct current limiting and breaking device based on countercurrent injection method |
| CN202276128U (en) * | 2011-09-15 | 2012-06-13 | 苏州微体电子科技有限公司 | Resonance type DC solid state breaker |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012100831A1 (en) * | 2011-01-27 | 2012-08-02 | Alstom Technology Ltd | Circuit breaker apparatus |
-
2013
- 2013-08-16 CN CN201310359263.7A patent/CN103441489B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101515710A (en) * | 2009-04-07 | 2009-08-26 | 东南大学 | Direct current limiting and breaking device based on countercurrent injection method |
| CN202276128U (en) * | 2011-09-15 | 2012-06-13 | 苏州微体电子科技有限公司 | Resonance type DC solid state breaker |
Non-Patent Citations (2)
| Title |
|---|
| EAST托卡马克大功率双向直流快速晶闸管开关可靠关断理论分析及参数优化设计;温家良等;《中国电机工程学报》;20050731;第25卷(第14期);第62页-第66页 * |
| 混合型限流断路器在高短路电流上升率时换流试验分析;王晨等;《电力***自动化》;20090825;第33卷(第16期);第65页-第69页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103441489A (en) | 2013-12-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103441489B (en) | A kind of MTDC transmission system DC circuit breaker and control method thereof | |
| CN103474983B (en) | High voltage and great current direct-current circuit breaker and control method thereof | |
| CN103457257B (en) | A kind of MTDC transmission system dc circuit breaker and control method thereof | |
| CN103457256B (en) | A kind of MTDC transmission system DC circuit breaker and control method thereof | |
| CN105870877B (en) | passive hybrid direct current breaker based on thyristor and application method thereof | |
| CN104979796B (en) | A kind of precharge type high speed d-c circuit breaker and its control method | |
| CN106300291A (en) | Hybrid high voltage DC breaker based on IGBT | |
| CN103618298A (en) | High-voltage direct-current breaker | |
| CN104753044A (en) | Topological structure of hybrid all-solid state high-voltage DC breaker | |
| CN108597926A (en) | A kind of hybrid direct-current breaker topology structure and its control method | |
| CN103681039B (en) | A kind of high-voltage direct-current breaker topology | |
| CN103646805B (en) | A kind of direct-current breaker topology | |
| CN104979795A (en) | Passive high-voltage direct-current circuit breaker and implementation method therefor | |
| CN104900444A (en) | Direct current (DC) breaker topology structure and DC breaker control method | |
| CN103441490B (en) | A kind of MTDC transmission system dc circuit breaker and control method thereof | |
| CN104638605A (en) | Capacitive buffer type mixed high-voltage direct current circuit breaker and control method thereof | |
| CN104980137B (en) | A kind of all solid state high speed d-c circuit breaker of forced commutation type and commutation switch | |
| CN103337829A (en) | Semi-controlled passive injection current high voltage direct current breaker and realization method thereof | |
| CN103647248A (en) | High-voltage DC rapid breaker | |
| CN106711930A (en) | DC circuit breaker and control method thereof | |
| CN203800578U (en) | High-voltage direct-current circuit breaker | |
| CN103457258B (en) | A kind of MTDC transmission system DC circuit breaker and control method thereof | |
| CN104009450A (en) | Module combination high-voltage direct-current breaker | |
| CN204391676U (en) | A kind of capacitive buffer formula mixed high-voltage DC circuit breaker | |
| CN103647263A (en) | DC circuit breaker based on half-control electric-power electronic devices |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |