CN108322205B - A kind of bridge-type solid-state direct-current breaker and its control method - Google Patents
A kind of bridge-type solid-state direct-current breaker and its control method Download PDFInfo
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- CN108322205B CN108322205B CN201810122692.5A CN201810122692A CN108322205B CN 108322205 B CN108322205 B CN 108322205B CN 201810122692 A CN201810122692 A CN 201810122692A CN 108322205 B CN108322205 B CN 108322205B
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- bridge
- full
- branch
- controlled device
- control device
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/567—Circuits characterised by the use of more than one type of semiconductor device, e.g. BIMOS, composite devices such as IGBT
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/081—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit
- H03K17/08116—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit in composite switches
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses a kind of bridge-type solid-state direct-current breaker and its control methods, including energy absorption branch, four bridge arms and bridge；Bridge arm two or three is in parallel by full-controlled device and arrester；Bridge arm one or four is connected by uncontrollable device and capacitor；Bridge is by two branch reverse parallel connections, and branch one is positive series connection half control device, and branch two is by resistance and uncontrollable devices in series；On state current flows through the half control device of bridge arm two or three and branch one, and full-controlled device turns off when DC side failure, and electric current flows through branch two and form voltage on its resistance to one or four capacitor charging of bridge arm；The voltage shows as backward voltage on branch one, closes its half control device；After the shutdown of half control device, capacitance voltage is increased to direct current system voltage rating, and electric current is blocked, and the remaining energy of system is absorbed by energy absorption branch.The present invention can quickly turn off DC current, and with bridge half control undertaken mains voltage, reduce the usage amount of full-controlled device, reduce investment and the loss of on-state.
Description
Technical field
It is specially a kind of based on half control device and full control the present invention relates to D.C. high voltage transmission dc circuit breaker technical field
The bridge-type solid-state direct-current breaker and its control method of device.
Background technique
The development of flexible direct current was very rapid in recent years, and dc circuit breaker needed for flexible DC transmission protection also becomes
The hot spot of research.The IGBT that dc circuit breaker needs very fast cutting DC current to prevent electric current from increasing to converter station is closed
Lock.But due to the inductance very little of flexible direct current network, electric current increases quickly when failure, and dc circuit breaker is needed very
Very big DC current is cut off inside the short time.
There are many topology of the dc circuit breaker proposed, are broadly divided into 3 classes: it is mechanical, it is all solid state, and it is hybrid.1) machine
Mechanical switch when cut-offfing is created in tool formula dc circuit breaker, the parallel connection circuit LC on the basis of conventional mechanical switch using LC
Zero crossing, so that arc extinction when mechanical switch is cut-off.2) the main branch road full-controlled device of all solid state dc circuit breaker
It is connected in series, failure when turns off full-controlled device.Such breaker can quickly cut off short circuit current but full-controlled device
It is larger that internal resistance is connected, it is very big to result in on-state loss.3) hybrid dc circuit breaker on state current branch routes mechanical switch and lacks
Amount full-controlled device is formed in parallel, and cut-offs branch routing full-controlled device and is connected in series.On state current branch full-controlled device is closed when failure
Disconnected, drop-out current branch full-controlled device is opened, and electric current is transferred to drop-out current branch, and mechanical switch is opened after electric current transfer is completed
Begin to open, mechanical switch opening procedure continues 2-3ms.After mechanical switch is cut-off, cut-offs branch solid-state switch and cut-off direct current
Stream.Breaker interrupting process is complicated, switch off time is longer, it is a large amount of cause to invest using full-controlled device it is huge.
Summary of the invention
In view of the above-mentioned problems, the purpose of the present invention is to provide a kind of bridge-type solid-state based on half control device and full-controlled device
Dc circuit breaker and its control method are capable of the dc circuit breaker of quick-speed turning on-off high current, while on-state loss is smaller, significant to drop
Low investment cost.Technical solution is as follows:
A kind of bridge-type solid-state direct-current breaker based on half control device and full-controlled device, including energy absorption branch and therewith
Bridge circuit in parallel；Energy absorption branch routes arrester and constitutes, for the energy after absorption system shutdown；Bridge circuit packet
Include four bridges between bridge arm and bridge arm；
First bridge arm and four bridge legs are formed by capacitor and uncontrollable devices in series, are cut-off for buffering full-controlled device
Journey；Second bridge arm and third bridge arm are formed in parallel by full-controlled device module and arrester, and the full-controlled device is for cutting off electricity
Stream, arrester in parallel is for limiting full-controlled device both ends overvoltage；
Bridge between bridge arm is formed by two branch reverse parallel connections；The first branch is made of half control device string, for leading
The electric current that logical full-controlled device flows through；Second branch is connected in series by uncontrollable device and small resistance, provides electricity reversed when cut-offfing
Distribution channel is flowed, while reversed shutdown voltage being provided to half control device.
Further, the full-controlled device includes that a full-controlled device or multiple full-controlled devices are series-parallel.
A kind of control method of the bridge-type solid-state direct-current breaker based on half control device and full-controlled device, comprising:
When normal work: control electric current flows through the full-controlled device and the bridge first branch of the second bridge arm and third bridge arm
In half control device formed access；
When DC system fault:
A) open signal of full-controlled device and half control device is turned off, electric current is shifted to the first bridge arm, four bridge legs and centre
The access that bridge second branch is formed；
B) electric current is flowed through in the second branch of bridge, and voltage is formed on resistance, thus with its antiparallel first
Backward voltage is formed above the half control device of branch, half control device is promoted to turn off；
C) after half control device and full-controlled device are turned off, as electric current is to the first bridge arm and four bridge legs capacitor charging,
Capacitance voltage rises to DC transmission system voltage rating, and electric current is blocked；
D) after breaker shutdown, direct current system dump energy is absorbed by energy absorption branch.
The beneficial effects of the present invention are: the present invention cuts off electric current using all solid state element, it is swift in motion, can quickly cuts off
DC current；Have and cut off electric current using a small amount of full-controlled device, with the high voltage after the cutting of half control undertaken, can subtract significantly
The use of few full-controlled device, not only reduces on-state loss, but also reduce the investment of dc circuit breaker.
Detailed description of the invention
Fig. 1 is that the present invention is based on the circuit diagrams of half control device and the bridge-type solid-state direct-current breaker of full-controlled device.
Specific embodiment
The present invention is described in further details in the following with reference to the drawings and specific embodiments.As shown in Figure 1, a kind of based on half
The bridge-type solid-state direct-current breaker of device and full-controlled device is controlled, including energy absorption branch and therewith the bridge circuit of parallel connection；Energy
Amount absorbs branch routing arrester and constitutes, for the energy after absorption system shutdown；Bridge circuit includes four bridge arms and bridge arm
Between bridge.
First bridge arm and four bridge legs are formed by capacitor and uncontrollable devices in series, are cut-off for buffering full-controlled device
Journey.Second bridge arm and third bridge arm are formed in parallel by full-controlled device module and arrester, and the full-controlled device is for cutting off electricity
Stream, arrester in parallel shield for limiting full-controlled device both ends overvoltage.Wherein the full-controlled device includes one
Full-controlled device or multiple full-controlled devices are series-parallel.
Full-controlled device on second bridge arm and third bridge arm cuts off electric current, and the half control device string in bridge undertakes cutting electric current
Most voltage landings later, can greatly reduce the usage amount of full-controlled device.On state current flows through the second bridge arm and
A small amount of full-controlled device of three bridge arms and the half control device string of bridge, on-state loss are smaller.Full-controlled device wired in parallel has lightning-arrest
Device prevents full-controlled device overtension to be damaged.
Bridge between bridge arm is formed by two branch reverse parallel connections；The first branch is made of half control device string, for leading
The electric current that logical full-controlled device flows through；Second branch is connected in series by uncontrollable device and small resistance, provides electricity reversed when cut-offfing
Distribution channel is flowed, while reversed shutdown voltage being provided to half control device.
The entire breaker actuation of the present embodiment does not have mechanical part, is swift in motion, can rapid breaking direct current.Its
Control process is as follows:
When normal work: control electric current flows through the full-controlled device and the bridge first branch of the second bridge arm and third bridge arm
In half control device formed access；
When DC system fault:
A) full-controlled device of the second bridge arm and third bridge arm and the open signal of half control device are turned off, electric current is shifted to first
The access that bridge arm, the capacitor of four bridge legs and intermediate bridge second branch are formed；Protection of arrester full-controlled device two in parallel
The voltage at end is not too large, so that breakdown full-controlled device.
B) current channel when second branch offer failure removal of bridge, small resistance are formed in current flowing
Voltage.The voltage shows as backward voltage on the half control device with its antiparallel first branch, promotes the first branch
The shutdown of half control device.
The first branch of bridge provides on state current when normal operation, and cut-off complete after bear it is main
Voltage landing.Such design can greatly reduce the use of full-controlled device, not only reduce the loss of on-state, but also reduce direct current
The investment of breaker.
C) after the half control device of the full-controlled device and the bridge first branch of the second bridge arm and third bridge arm is turned off, with
For electric current to the first bridge arm and four bridge legs capacitor charging, capacitance voltage rises to DC transmission system voltage rating, and electric current is hindered
It is disconnected.
D) after breaker shutdown, direct current system dump energy is absorbed by energy absorption branch.
Claims (3)
1. a kind of bridge-type solid-state direct-current breaker based on half control device and full-controlled device, which is characterized in that including energy absorption
Branch and bridge circuit in parallel therewith；Energy absorption branch routes arrester and constitutes, for the energy after absorption system shutdown；
Bridge circuit includes four bridges between bridge arm and bridge arm；
First bridge arm and four bridge legs are formed by capacitor and uncontrollable devices in series, for buffering full-controlled device interrupting process；
Second bridge arm and third bridge arm are formed in parallel by full-controlled device module and arrester, and the full-controlled device is used to cut off electric current,
Arrester in parallel is for limiting full-controlled device both ends overvoltage；
Bridge between bridge arm is formed by two branch reverse parallel connections；The first branch is made of half control device string, complete for being connected
The electric current that control device flows through；Second branch is connected in series by uncontrollable device and small resistance, provides electric current stream reversed when cut-offfing
Road all, while reversed shutdown voltage being provided to half control device.
2. the bridge-type solid-state direct-current breaker according to claim 1 based on half control device and full-controlled device, feature exist
In the full-controlled device includes that a full-controlled device or multiple full-controlled devices are series-parallel.
3. a kind of controlling party of the bridge-type solid-state direct-current breaker described in claim 1 based on half control device and full-controlled device
Method characterized by comprising
When normal work: control electric current flows through in the full-controlled device and the bridge first branch of the second bridge arm and third bridge arm
Half control device formed access；
When DC system fault:
A) open signal of full-controlled device and half control device is turned off, electric current is shifted to the first bridge arm, four bridge legs and intermediate bridge
The access that second branch is formed；
B) electric current is flowed through in the second branch of bridge, and voltage is formed on resistance, thus with its antiparallel first branch
Half control device above form backward voltage, promote half control device turn off；
C) after half control device and full-controlled device are turned off, as electric current is to the first bridge arm and four bridge legs capacitor charging, capacitor
Voltage rises to DC transmission system voltage rating, and electric current is blocked；
D) after breaker shutdown, direct current system dump energy is absorbed by energy absorption branch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810122692.5A CN108322205B (en) | 2018-02-07 | 2018-02-07 | A kind of bridge-type solid-state direct-current breaker and its control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810122692.5A CN108322205B (en) | 2018-02-07 | 2018-02-07 | A kind of bridge-type solid-state direct-current breaker and its control method |
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| CN108322205A CN108322205A (en) | 2018-07-24 |
| CN108322205B true CN108322205B (en) | 2019-10-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111404113A (en) * | 2020-04-24 | 2020-07-10 | 四川大学 | T-shaped direct current breaker and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110518545B (en) * | 2019-08-30 | 2021-03-16 | 西南交通大学 | Hybrid high-voltage direct-current circuit breaker based on bidirectional current limiting module |
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| US7466185B2 (en) * | 2006-10-23 | 2008-12-16 | Infineon Technologies Ag | IGBT-Driver circuit for desaturated turn-off with high desaturation level |
| CN104767171B (en) * | 2014-01-06 | 2018-01-19 | 国家电网公司 | A kind of high voltage DC breaker and its implementation |
| US10840699B2 (en) * | 2015-08-11 | 2020-11-17 | Efacec Energia, Máquinas E Equipamentos Eléctricos, S.A. | Fault current managing branch for surge-less current interruption in DC system |
| CN106549357A (en) * | 2016-11-11 | 2017-03-29 | 西安交通大学 | A kind of magnetic field impulse sensing transfer type dc circuit breaker and its using method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111404113A (en) * | 2020-04-24 | 2020-07-10 | 四川大学 | T-shaped direct current breaker and control method thereof |
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