CN105281287A - Thyristor-based direct current breaker topology with bidirectional blocking function - Google Patents
Thyristor-based direct current breaker topology with bidirectional blocking function Download PDFInfo
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- CN105281287A CN105281287A CN201510690563.2A CN201510690563A CN105281287A CN 105281287 A CN105281287 A CN 105281287A CN 201510690563 A CN201510690563 A CN 201510690563A CN 105281287 A CN105281287 A CN 105281287A
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Abstract
A thyristor-based direct current breaker topology with a bidirectional blocking function is disclosed. The thyristor-based direct current breaker topology comprises a main branch module (1), a thyristor capacitance branch module (2), a first diode group (3) and a second diode group (4); the first leading-out terminal of the main branch module (1) is connected with the positive electrode of the first diode group (3), and the connecting point between the first leading-out terminal of the main branch module and the positive electrode of the first diode group is used as the first leading-out terminal (5) of the direct current breaker topology; the second leading-out terminal of the main branch module (1) is connected with the positive electrode of the second diode group (4), and the connecting point between the second leading-out terminal of the main branch module and the positive electrode of the second diode group is used as the second leading-out terminal (6) of the direct current breaker topology; the negative electrode of the first diode group (3) is connected with the negative electrode of the second diode group (4); and the second leading-out terminal of the thyristor capacitance branch module (2) is used as the third leading-out terminal (8) of the direct current breaker topology.
Description
Technical field
The present invention relates to a kind of direct-current breaker topology.
Background technology
Fast DC Circuit Breaker is one of key equipment ensureing direct current transmission and distribution system and direct current network system stability safe and reliable operation.Be that the electric current of direct current system does not exist natural zero-crossing point with AC system difference, the natural zero-crossing point of electric current therefore cannot be utilized in direct current system as AC system to turn off, therefore the problem of cut-offfing of direct current is a problem being worth research always.
Current breaking direct current has two kinds of modes usually, and the first is pure power electronics circuit breaker, as the patent CN102870181A of ABB AB's application, utilizes and high-powerly turns off power electronic device, direct disjunction direct current.Utilize the solid circuit breaker that this principle manufactures, although can meet the requirement of multiterminal flexible direct current system in time, the loss when normally is excessive, and economy is poor.
The second is mixing Circuit breaker technology, namely on the basis of traditional interchange mechanical chopper, by increasing auxiliary Power Electronic Circuit, dropping into current-limiting resistance to reduce short circuit current or superimposed oscillation electric current on the direct current cut-offfing arc gap, utilizing during current over-zero and cut-off circuit.Utilize the hybrid circuit breaker that this principle manufactures, it has particular/special requirement to mechanical switch, the more difficult requirement meeting DC transmission system on break-time.
Summary of the invention
The object of the invention is shortcoming too high based on the DC circuit breaker cost of IGBT technology at present, propose a kind of hybrid DC circuit breaker possessing two-way blocking-up function based on thyristor.When the present invention has a steady operation, loss is little, without arc cutting when there is short trouble, responds the features such as rapid.
The described bidirectional, dc circuit breaker topology possessing two-way blocking-up function is by main branch road module, thyristor capacitive branch module, and the first diode group and the second diode group form.First leading-out terminal of main branch road module is connected with the anode of the first diode group, and its tie point is as the first leading-out terminal of described direct-current breaker topology; Second leading-out terminal of main branch road module is connected with the anode of the second diode group, and its tie point is as the second leading-out terminal of described direct-current breaker topology; The negative electrode of the first diode group is connected with the negative electrode of the second diode group, and is connected to tie point with the first leading-out terminal of thyristor capacitive branch module; Second leading-out terminal of thyristor capacitive branch module is sub as the three terminal of described direct-current breaker topology.
Described main branch road module is made up of mechanical switch and semiconductor device group.One end of mechanical switch is as the first leading-out terminal of main branch road module, and the other end of mechanical switch is connected with the first leading-out terminal of semiconductor device group, and the second leading-out terminal of semiconductor device group is as the second leading-out terminal of main branch road module.The semiconductor device group of described main branch road module is made up of thyristor inverse parallel.
Described thyristor capacitive branch module is by the first capacitance group, and the second capacitance group, the first thyristor groups, the second thyristor groups, the first lightning arrester and the second lightning arrester form.One end of first capacitance group is as the first leading-out terminal of thyristor capacitive branch module, and the other end of the first capacitance group and the anode of the first thyristor groups are connected to the first tie point.One end of second capacitance group is connected with the first tie point, and the other end of the second capacitance group is connected with the anode of the second thyristor groups, and the negative electrode of the second thyristor groups is connected with the negative electrode of the first thyristor groups, and as the second leading-out terminal of thyristor capacitive branch module; First lightning arrester is connected in parallel on the first electric capacity two ends, and the second lightning arrester is connected in parallel on the second electric capacity two ends.
The first described capacitance group and the second capacitance group are all equipped with pre-charge circuit, carry out precharge to it.
When not having direct-current short circuit fault, electric current flows through from main branch road.When direct-current short circuit fault occurs, described thyristor capacitive branch module first thyristor groups conducting, first capacitance group electric discharge, current transfer is to described thyristor capacitive branch, described main branch road semiconductor device group current over-zero turns off, mechanical switch starts to cut-off subsequently, after mechanical switch cut-offs completely, the second described thyristor groups conducting, second capacitance group electric discharge, fault current flows through the first capacitance group, the second capacitance group, second thyristor groups, goes out from the three terminal subflow of direct-current breaker topology.When the first capacitance group both end voltage is more than the first lightning arrester group operation voltage, or the second capacitance group both end voltage more than the second lightning arrester group operation voltage time, lightning arrestor movement, electric current is dissipated by lightning arrester, and direct fault current is reduced to zero.
Described thyristor capacitive branch module also has another kind of building form: by the first thyristor groups, the second thyristor groups, capacitance group and lightning arrester group composition.The anode of the first thyristor groups is as the first leading-out terminal of thyristor capacitive branch module, and the negative electrode of the first thyristor groups is as the second leading-out terminal of thyristor capacitive branch module; One end of capacitance group is connected with the first leading-out terminal of thyristor capacitive branch module, and the other end of capacitance group is connected with the anode of the second thyristor groups, and the negative electrode of the second thyristor groups is connected with the negative electrode of the first thyristor groups.Lightning arrester is connected in parallel on the first thyristor groups two ends.
When thyristor capacitive branch adopts this topological structure, the semiconductor device group of described main branch road module is made up of two IGBT differential concatenations.When not having direct-current short circuit fault, electric current flows through from main branch road.When direct-current short circuit fault occurs, described thyristor capacitive branch module first thyristor groups conducting, current transfer is to described thyristor capacitive branch, and described main branch road semiconductor device group turns off, and mechanical switch starts to cut-off subsequently, after mechanical switch cut-offs completely, the second described thyristor groups conducting, capacitance group is discharged, and fault current flows through capacitance group, second thyristor groups, goes out from the three terminal subflow of direct-current breaker topology.When capacitance group both end voltage exceedes lightning arrester group operation voltage, lightning arrestor movement, electric current is dissipated by lightning arrester, and direct fault current is reduced to zero.
Advantage of the present invention:
A. used semiconductor device quantity is few, and withstand voltage demand is low;
B. whole device passive device demand is few, and volume is little, lightweight;
C. adopt thyristor technology, reduce costs.
Accompanying drawing explanation
Fig. 1 is electrical block diagram of the present invention;
Fig. 2 is the circuit theory diagrams of embodiments of the invention 1;
Fig. 3 is the circuit theory diagrams of the another kind of implementation of DC circuit breaker of the present invention.
Embodiment
Below in conjunction with the drawings and the specific embodiments, the invention will be further described.
Described direct-current breaker topology is made up of main branch road module 1, thyristor capacitive branch module 2, first diode group 3 and the second diode group 4; First leading-out terminal of main branch road module 1 is connected with the anode of the first diode group 3, and its tie point is as the first leading-out terminal 5 of described direct-current breaker topology; Second leading-out terminal of main branch road module 1 is connected with the anode of the second diode group 4, and its tie point is as the second leading-out terminal 6 of described direct-current breaker topology; The negative electrode of the first diode group 3 is connected with the negative electrode of the second diode group 4, and is connected to tie point 7 with the first leading-out terminal of thyristor capacitive branch module 2; Second leading-out terminal of thyristor capacitive branch module 2 is as three terminal 8 of described direct-current breaker topology.
Described main branch road module is made up of mechanical switch 11 and semiconductor device group 14; One end of mechanical switch 11 is as the first leading-out terminal of main branch road module, and the other end of mechanical switch 11 is connected with the first leading-out terminal of semiconductor device group 14, and the second leading-out terminal of semiconductor device group 14 is as the second leading-out terminal of main branch road module 1.The semiconductor device group 14 of described main branch road module is made up of two thyristor inverse parallels.
Described thyristor capacitive branch module 2 is made up of the first capacitance group 21, second capacitance group 23, first thyristor groups 22, second thyristor groups 24, first lightning arrester 25 and the second lightning arrester 26.One end of first capacitance group is connected to the first tie point 29 as the other end of the first leading-out terminal 27, first capacitance group of thyristor capacitive branch module 2 and the anode of the first thyristor groups 22.One end of second capacitance group 23 is connected with the first tie point 29, the other end of the second capacitance group 23 is connected with the anode of the second thyristor groups 22, the negative electrode of the second thyristor groups 22 is connected with the negative electrode of the first thyristor groups, and as the second leading-out terminal 28 of thyristor capacitive branch module 2; First lightning arrester 25 is connected in parallel on the first electric capacity 23 two ends, and the second lightning arrester 26 is connected in parallel on the second electric capacity 23 two ends.
As shown in Figure 3, described thyristor capacitive branch module 2 also has another kind of building form: by the first thyristor groups 31, second thyristor groups 33, capacitance group 32 and lightning arrester group 34 form.The anode of the first thyristor groups 31 as the negative electrode of the first leading-out terminal 27, first thyristor groups 31 of thyristor capacitive branch module 2 as the second leading-out terminal 28 of thyristor capacitive branch module 2; One end of capacitance group is connected with the first leading-out terminal 27 of thyristor capacitive branch module 2, and the other end of capacitance group is connected with the anode of the second thyristor groups 33, and the negative electrode of the second thyristor groups 33 is connected with the negative electrode of the first thyristor groups 31.Lightning arrester is connected in parallel on the first thyristor groups two ends.
When thyristor capacitive branch adopts this topological structure shown in Fig. 3, the semiconductor device group 14 of described main branch road module 2 is made up of thyristor inverse parallel.The semiconductor device group 14 of described main branch road module 2 is made up of two IGBT differential concatenations.
Figure 2 shows that the specific embodiment in DC circuit breaker of the present invention access AC line, wherein DC circuit breaker the first leading-out terminal 5 be connected with one end of the inductance 32 in DC line, the other end of inductance 32 is connected with the positive pole of current conversion station 33, second leading-out terminal 6 of DC circuit breaker is connected with short dot 31, and three terminal 8 of DC circuit breaker is connected with negative DC bus.Semiconductor device group 14 in main branch road module is made up of two thyristor inverse parallels.
Claims (6)
1. the direct-current breaker topology possessing two-way blocking-up function based on thyristor, it is characterized in that: described direct-current breaker topology is by main branch road module (1), thyristor capacitive branch module (2), and the first diode group (3) and the second diode group (4) form; First leading-out terminal of main branch road module (1) is connected with the anode of the first diode group (3), and its tie point is as first leading-out terminal (5) of described direct-current breaker topology; Second leading-out terminal of main branch road module (1) is connected with the anode of the second diode group (4), and its tie point is as second leading-out terminal (6) of described direct-current breaker topology; The negative electrode of the first diode group (3) is connected with the negative electrode of the second diode group (4), and is connected to tie point (7) with the first leading-out terminal of thyristor capacitive branch module (2); Second leading-out terminal of thyristor capacitive branch module (2) is as three terminal (8) of described direct-current breaker topology.
2. according to direct-current breaker topology according to claim 1, it is characterized in that: described main branch road module is made up of mechanical switch (11) and semiconductor device group (14); One end of mechanical switch (11) is as the first leading-out terminal of main branch road module, the other end of mechanical switch (11) is connected with the first leading-out terminal of semiconductor device group (14), and the second leading-out terminal of semiconductor device group (14) is as the second leading-out terminal of main branch road module (1).
3. according to direct-current breaker topology according to claim 1, it is characterized in that: described thyristor capacitive branch module (2) is by the first capacitance group (21), second capacitance group (23), first thyristor groups (22), second thyristor groups (24), first lightning arrester (25) and the second lightning arrester (26) composition, one end of first capacitance group is as first leading-out terminal (27) of thyristor capacitive branch module (2), and the anode of the other end and the first thyristor groups (22) is connected to the first tie point (29); Second capacitance group (23) one end is connected with the first tie point (29), the other end is connected with the anode of the second thyristor groups (22), the negative electrode of the second thyristor groups (22) is connected with the negative electrode of the first thyristor groups, and as second leading-out terminal (28) of thyristor capacitive branch module (2); First lightning arrester (25) is connected in parallel on the first electric capacity (23) two ends, and the second lightning arrester (26) is connected in parallel on the second electric capacity (23) two ends.
4. according to direct-current breaker topology according to claim 1, it is characterized in that: described thyristor capacitive branch module (2) is by the first thyristor groups (31), second thyristor groups (33), capacitance group (32), lightning arrester group (34) forms; The anode of the first thyristor groups (31) is as first leading-out terminal (27) of thyristor capacitive branch module (2), and the negative electrode of the first thyristor groups (31) is as second leading-out terminal (28) of thyristor capacitive branch module (2); One end of capacitance group is connected with first leading-out terminal (27) of thyristor capacitive branch module (2), the other end is connected with the anode of the second thyristor groups (33), and the negative electrode of the second thyristor groups (33) is connected with the negative electrode of the first thyristor groups (31); Lightning arrester is connected in parallel on the first thyristor groups two ends.
5. according to direct-current breaker topology according to claim 1, it is characterized in that: the semiconductor device group (14) of described main branch road module (2) is made up of thyristor inverse parallel.
6. according to direct-current breaker topology according to claim 1, it is characterized in that: the semiconductor device group (14) of described main branch road module (2) is made up of two IGBT differential concatenations.
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| CN201510690563.2A CN105281287B (en) | 2015-10-22 | 2015-10-22 | A kind of direct-current breaker topology for having two-way blocking-up function based on thyristor |
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| CN201510690563.2A CN105281287B (en) | 2015-10-22 | 2015-10-22 | A kind of direct-current breaker topology for having two-way blocking-up function based on thyristor |
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| CN107947131A (en) * | 2017-11-30 | 2018-04-20 | 天津大学 | Fault insulation and resume method based on micro- loss combined machine formula dc circuit breaker |
| CN108683158A (en) * | 2018-04-26 | 2018-10-19 | 中国科学院电工研究所 | A kind of dc circuit breaker |
| CN109659911A (en) * | 2018-12-13 | 2019-04-19 | 华北电力大学 | A kind of failure self-cleaning MMC topology suitable for multiterminal element and DC grid |
| CN112968420A (en) * | 2021-02-18 | 2021-06-15 | 天津大学 | Thyristor type hybrid direct current circuit breaker and control method thereof |
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| CN109659911A (en) * | 2018-12-13 | 2019-04-19 | 华北电力大学 | A kind of failure self-cleaning MMC topology suitable for multiterminal element and DC grid |
| CN112968420A (en) * | 2021-02-18 | 2021-06-15 | 天津大学 | Thyristor type hybrid direct current circuit breaker and control method thereof |
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| CN105281287B (en) | 2018-08-07 |
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