CN110098598A - Inverse-impedance type mixing submodule and its failure blocking-up method with failure blocking ability - Google Patents
Inverse-impedance type mixing submodule and its failure blocking-up method with failure blocking ability Download PDFInfo
- Publication number
- CN110098598A CN110098598A CN201910403040.3A CN201910403040A CN110098598A CN 110098598 A CN110098598 A CN 110098598A CN 201910403040 A CN201910403040 A CN 201910403040A CN 110098598 A CN110098598 A CN 110098598A
- Authority
- CN
- China
- Prior art keywords
- switch unit
- capacitor
- fault current
- switch
- clamp diode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
- H02H7/1225—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters responsive to internal faults, e.g. shoot-through
Abstract
The invention discloses a kind of inverse-impedance type mixing submodule with failure blocking ability, the the second half-bridge submodule formed including the first half-bridge submodule that first switch unit, second switch unit and first capacitor are formed, third switch unit, the 4th switch unit, the 5th switch unit and the second capacitor；4th switch unit uses the structure type of two insulated gate bipolar transistor reverse parallel connections, to have the function of bidirectionally conductive-two-way blocking-up；Rest switch unit is all made of the structure type of insulated gate bipolar transistor reverse parallel connection freewheeling diode, to have the unidirectional block function of bidirectionally conductive-；0, U can be exported by the switching of operating modeC、2UCThree kinds of operating voltages are capable of providing 2U to positive and negative fault currentCCounter electromotive force blocked.One kind is also provided and adopts failure blocking-up method, turns off each switch unit, fault current generates counter electromotive force during the charging process and block to fault current to first capacitor and the second capacitor serial connection charge.
Description
Technical field
It is the present invention relates to modularization multi-level converter field, in particular to a kind of for having in multilevel converter
The inverse-impedance type mixing submodule of failure blocking ability.Further relate to a kind of blocking-up method of fault current.
Background technique
Modularization multi-level converter is developed rapidly after being proposed from 2002 by Marquardt R. et al..It is different
Have many advantages, such as that switching frequency is low, it is small to be lost, good to be widely used in compliance straight for waveform quality in two level VSC of tradition, MMC
It flows in power transmission engineering.When the bipolar short trouble of DC side occurs for system, afterflow effect due to diode is so as to cause being based on
The MMC of traditional HBSM can not block fault current, cause larger harm to system.Therefore, it realizes that MMC DC Line Fault blocks, mentions
The submodule topological structure for providing faulty blocking ability is the popular domain studied both at home and abroad.Wherein, full-bridge submodule topology
Although structure (FBSM) block can be realized fault current blocking ability, but switching device mistake required for its output unit level
It is more, cause loss serious.For solve the problems, such as switching device quantity it is excessive this, derailing switch can be reduced by having scholar to propose one kind
The clamper Shuangzi module topology structure (Clamped dual submodule, CDSM) of number of packages amount and to its failure block principle with
And the fault current characteristics in the case of the various faults of exchange side failure, but for how to block AC fault electric current and be
Blanket insurance maintaining method does not refer to.In addition, although CDSM can obviously block fault current, since it is during failure blocks
There are two kinds of different capacitance connection modes, and leading to current direction, simultaneous faults blocking ability is not different.In addition scholar proposes
Submodule quantity can be reduced to CDSM topology knot by a kind of submodule topological structure that can effectively block fault current, the structure
The half of structure submodule quantity, but number of devices needed for its unit output level is high, and exists always under normal operation
Two switching devices of conducting, loss are serious.
In conclusion the submodule topological structure with failure blocking ability exists, number of devices is more, loss is serious, electricity
Direction not simultaneous faults blocking ability not parity problem is flowed, how not to increase device required for unit output level in submodule
While number of packages amount, make submodule the failure blocking ability of different current directions it is identical at present there has been no it is feasible topology knot
Structure.
Summary of the invention
In view of the above shortcomings of the prior art, the present invention provides a kind of inverse-impedance type mixing submodule with failure blocking ability
Block topology improves failure blocking ability while not increasing number of devices required for unit output level in submodule, and
Keep submodule identical in the failure blocking ability of different current directions.
In order to solve the above technical problems, technical scheme is as follows: a kind of inverse-impedance type with failure blocking ability
Mix submodule, including the first half-bridge submodule, the second half-bridge submodule, the first clamp diode and the second clamp diode；
The first half-bridge submodule includes first switch unit, second switch unit and first capacitor；The second half-bridge submodule
Including third switch unit, the 4th switch unit, the 5th switch unit and the second capacitor；The parameter of first capacitor and the second capacitor
It is identical, and the voltage reference value of first capacitor and the second capacitor is UC；
First switch unit, second switch unit, third switch unit and the 5th switch unit are all made of insulated gate bipolar crystalline substance
The structure type of body pipe reverse parallel connection freewheeling diode, to have the unidirectional block function of bidirectionally conductive-, and with insulated gate bipolar
The conducting direction of transistor npn npn is forward conduction direction, using the conducting direction of freewheeling diode as reverse-conducting direction, and only
There is forward conduction direction that can be turned off；First switch unit, second switch unit, third switch unit and the 5th switch unit
Conducting refer to bidirectionally conductive, shutdown refers to that forward conduction direction is turned off；
4th switch unit uses the structure type of two insulated gate bipolar transistor reverse parallel connections, to have two-way lead
Logical-two-way blocking-up function；The conducting of 4th switch unit refers to bidirectionally conductive, and shutdown refers to two-way shutdown；
First switch unit is in parallel with first capacitor after connecting with second switch unit forward direction, i.e., first switch unit is opened with second
The forward conduction direction for closing unit is consistent, and first capacitor positive terminal is connect with first switch unit, first capacitor negative pole end and the
The connection of two switch units；The forward conduction direction of third switch unit and the forward conduction direction of first switch unit are consistent；The
Three switch units, first clamp diode in parallel after connecting with the 4th switch unit, and the anode of the first clamp diode and the
The connection of four switch units, the cathode of the first clamp diode are connect with third switch unit；Second capacitor negative pole end differential concatenation
5th switch unit, and the anode of the first clamp diode is connect with the 5th switch unit, the cathode of the first clamp diode
It is connect with the positive terminal of the second capacitor；Connect after first capacitor positive terminal the second clamp diode of series connection with the negative pole end of the second capacitor
It connects, and the anode of the second clamp diode is connect with the negative pole end of the second capacitor, the cathode of the second clamp diode and first
The positive terminal of capacitor connects, between the negative pole end access third switch unit of first capacitor and the 4th switch unit, thus by the
One half-bridge submodule is together in series with the second half-bridge submodule；
Indirect first feeder ear of first switch unit and second switch unit, the 4th switch unit, the 5th switch unit and
The tie point of one clamp diode connects the second feeder ear.
Further, 0, U can be exported by the switching of operating modeC、2UCThree kinds of operating voltages.
Further, there is following four operational module:
Operating mode 1: the shutdown of first switch unit, second switch unit and the 5th switch unit, second switch unit and
Four switching means conductives, so that first capacitor is bypassed with the second capacitor, external output voltage is 0；
Operating mode 2: second switch unit, third switch unit and the 5th switch unit turn off, first switch unit and the 4th
Switching means conductive, so that first capacitor is connected in series in circuit, the second capacitor is bypassed, and external output voltage is UC；
Operating mode 3: first switch unit and the 4th switch unit disconnect, second switch unit, third switch unit and the 5th
Switching means conductive, so that first capacitor is bypassed, the second capacitor is connected in series in circuit, and external output voltage is UC；
Operating mode 4: second switch unit and the 4th switch unit turn off, first switch unit, third switch unit and the 5th
Switching means conductive, so that first capacitor and the second capacitor are connected in series in circuit, external output voltage is 2UC。
Further, it is capable of providing 2UCCounter electromotive force fault current is blocked.
A kind of failure blocking side using the inverse-impedance type mixing submodule with failure blocking ability of the invention is also provided
Method, which comprises the following steps:
Step 1: when an error occurs, shutdown first switch unit, second switch unit, third switch unit, the 4th switch are single
Member and the 5th switch unit；
Step 2: judging fault current direction: if fault current is flowed into from the first feeder ear, for positive fault current, into step
Rapid 3；If fault current is flowed into from the second feeder ear, for reverse fault current, 4 are entered step；
Step 3: positive fault current pass sequentially through the freewheeling diode of first switch unit, first capacitor, third switch it is continuous
The freewheeling diode of diode, the second capacitor, the 5th switch unit is flowed, and is flowed out from the second feeder ear, so that positive event
Hinder electric current to concatenated first capacitor and the second capacitor charging, first capacitor generates anti-electronic during the charging process with the second capacitor
Gesture blocks fault current；
Step 4: reverse fault electric current passes sequentially through the first clamp diode, the second capacitor, the second clamp diode, the first electricity
Hold, the freewheeling diode of second switch unit, and flowed out from the first feeder ear, so that reverse fault current is to concatenated the
One capacitor and the second capacitor charging, first capacitor and the second capacitor generate counter electromotive force during the charging process and carry out to fault current
It blocks.
Compared with prior art, the invention has the following advantages:
1, all using the switch unit with the unidirectional block function of bidirectionally conductive-in traditional CDSM, the present invention changes it
In a switch unit structure, i.e. the 4th switch unit use two insulated gate bipolar transistor reverse parallel connections structure shape
Formula, being formed has bidirectionally conductive-two-way blocking-up function switch unit, and has adjusted circuit structure accordingly, to guarantee
Whether when positive fault current or reverse fault electric current occur, first capacitor and the second capacitor can be connected in series to charging simultaneously
To generate inverse electromotive force in circuit, to improve failure blocking ability under conditions of not increasing capacitor element, and right
Forward and reverse fault current provides identical blocking ability.
2, in the identical situation of the reference voltage of capacitor, traditional CDSM is to the blocking ability of positive fault current
2UC, the blocking ability to reverse fault electric current is 0.5 UC.However, blocking ability of the present invention to positive and negative direction fault current
It is 2UC, it can be seen that the present invention significantly promotes the failure blocking ability of reverse current.
Although 3, traditional CDSM can also export 3 kinds of operation levels, the output of every kind of operation level has been required to three
A switch unit simultaneously turns on, and operating mode 1 of the invention and operating mode 2 only require two switching means conductives, can
Reduce loss.
Detailed description of the invention
Fig. 1 is the topological structure schematic diagram of CDSM in the prior art；
Fig. 2 is the topological structure schematic diagram of the inverse-impedance type mixing submodule in present embodiment with failure blocking ability；
Fig. 3 is current flow paths schematic diagram when positive fault current flows into submodule in the failure blocking-up method of this hair；
Fig. 4 be in the failure blocking-up method of this hair reversely to fault current flow into submodule when current flow paths schematic diagram.
Specific embodiment
Refering to what is shown in Fig. 2, a kind of inverse-impedance type mixing submodule with failure blocking ability, including the first half-bridge submodule
Block, the second half-bridge submodule, the first clamp diode D1 and the second clamp diode D2；The first half-bridge submodule includes the
One switch unit, second switch unit and first capacitor C1；The second half-bridge submodule includes third switch unit, the 4th opens
Close unit, the 5th switch unit and the second capacitor C2；First capacitor C1 is identical with the parameter of the second capacitor C2, and first
The voltage reference value of capacitor C1 and the second capacitor C2 are UC。
First switch unit, second switch unit, third switch unit and the 5th switch unit are all made of insulated gate bipolar
The structure type of transistor npn npn reverse parallel connection freewheeling diode, to have the unidirectional block function of bidirectionally conductive-, and with insulated gate
The conducting direction of bipolar junction transistor is forward conduction direction, using the conducting direction of freewheeling diode as reverse-conducting direction, and
And only forward conduction direction can be turned off；First switch unit, second switch unit, third switch unit and the 5th switch
The conducting of unit refers to bidirectionally conductive, and shutdown refers to that forward conduction direction is turned off.
First switch unit includes insulated gate bipolar transistor VT1 and freewheeling diode VD1, insulated gate bipolar crystal
The grid of pipe VT1 is for receiving control signal, the transmitting of the anode and insulated gate bipolar transistor VT1 of freewheeling diode VD1
Collection connection, cathode is connect with the collector of insulated gate bipolar transistor VT1, to form reverse parallel connection.
Second switch unit includes insulated gate bipolar transistor VT2 and freewheeling diode VD2, insulated gate bipolar crystal
The grid of pipe VT2 is for receiving control signal, the transmitting of the anode and insulated gate bipolar transistor VT2 of freewheeling diode VD2
Collection connection, cathode is connect with the collector of insulated gate bipolar transistor VT2, to form reverse parallel connection.
Third switch unit includes insulated gate bipolar transistor VT3 and freewheeling diode VD3, insulated gate bipolar crystal
The grid of pipe VT3 is for receiving control signal, the transmitting of the anode and insulated gate bipolar transistor VT3 of freewheeling diode VD3
Collection connection, cathode is connect with the collector of insulated gate bipolar transistor VT3, to form reverse parallel connection.
5th switch unit includes insulated gate bipolar transistor VT6 and freewheeling diode VD4, freewheeling diode VD4's
Anode is connect with the transmitting collection of insulated gate bipolar transistor VT6, the collector of cathode and insulated gate bipolar transistor VT6
Connection, to form reverse parallel connection.
4th switch unit uses the structure type of two insulated gate bipolar transistor reverse parallel connections, to have two-way
Conducting-two-way blocking-up function；The conducting of 4th switch unit refers to bidirectionally conductive, and shutdown refers to two-way shutdown.
4th switch unit includes insulated gate bipolar transistor VT4 and insulated gate bipolar transistor VT5, and insulated gate is double
Collector, the transmitting collection of bipolar transistor VT4 is connect with transmitting collection, the collector of insulated gate bipolar transistor VT5 respectively, from
And form reverse parallel connection.
First switch unit is in parallel with first capacitor C1 after connecting with second switch unit forward direction, i.e., first switch unit with
The forward conduction direction of second switch unit is consistent, and the transmitting collection and insulated gate bipolar of insulated gate bipolar transistor VT1 is brilliant
The collector of body pipe VT2 connects so that first switch unit and second switch unit formed it is positive connect, first capacitor C1
Positive terminal is connect with first switch unit, and first capacitor C1 negative pole end is connect with second switch unit；Third switch unit is just
It is consistent with the forward conduction direction of first switch unit to conducting direction；Third switch unit connect with the 4th switch unit after simultaneously
Join the first clamp diode D1, and the anode of the first clamp diode D1 is connect with the 4th switch unit, two pole of the first clamper
The cathode of pipe D1 is connect with third switch unit；The 5th switch unit (i.e. the second capacitor of second capacitor C2 negative pole end differential concatenation
C2 negative pole end connect with the transmitting collection of insulated gate bipolar transistor VT6 and to form differential concatenation), and the first clamp diode D1
Anode connect with the 5th switch unit, the cathode of the first clamp diode D1 is connect with the positive terminal of the second capacitor C2；First
It is connect after the second clamp diode D2 of capacitor C1 positive terminal series connection with the negative pole end of the second capacitor C2, and the second clamp diode
The anode of D2 is connect with the negative pole end of the second capacitor C2, and the cathode of the second clamp diode D2 and the positive terminal of first capacitor C1 connect
It connects, between the negative pole end access third switch unit of first capacitor C1 and the 4th switch unit, thus by the first half-bridge submodule
It is together in series with the second half-bridge submodule.
Indirect first feeder ear of first switch unit and second switch unit, the 4th switch unit, the 5th switch unit
The second feeder ear is connect with the tie point of the first clamp diode D1.
Refering to what is shown in Fig. 2, the inverse-impedance type mixing submodule with failure blocking ability of the invention has following 4 kinds work
Mode can export 0, U by the switching of operating modeC、2UCThree kinds of operating voltages:
Operating mode 1: (i.e. VT1, VT2, VT6 are closed for the shutdown of first switch unit, second switch unit and the 5th switch unit
It is disconnected), second switch unit and the 4th switching means conductive, so that first capacitor C1 is bypassed with the second capacitor C2, it is externally defeated
Voltage is 0 out.
Operating mode 2: (i.e. VT2, VT3, VT6 are closed for second switch unit, third switch unit and the shutdown of the 5th switch unit
It is disconnected), first switch unit and the 4th switching means conductive, so that first capacitor C1 is connected in series in circuit, the second capacitor C2 is other
Road, external output voltage are UC。
Operating mode 3: first switch unit and the 4th switch unit disconnect (i.e. VT1, VT4, VT5 are turned off), second switch
Unit, third switch unit and the 5th switching means conductive, so that first capacitor C1 is bypassed, the second capacitor C2 is connected in series to circuit
In, external output voltage is UC。
Operating mode 4: second switch unit and the 4th switch unit shutdown (i.e. VT2, VT4, VT5 are turned off), first switch
Unit, third switch unit and the 5th switching means conductive, so that first capacitor C1 and the second capacitor C2 are connected in series in circuit,
External output voltage is 2UC。
Although can also export 3 kinds of operation levels for traditional CDSM, the output of every kind of operation level has been required to
Three switch units simultaneously turn on, with reference to shown in Fig. 1: 1) traditional CDSM exports 2UCOperation level require VT1, VT7 with
VT4 conducting；2) traditional CDSM exports UCOperation level require VT1, VT6, VT4 conducting；3) work of traditional CDSM output 0
Make level demand VT2, VT6, VT4 conducting.It can be seen that traditional CDSM necessarily requires VT4 constantly on, every kind of operation level
Output be required to simultaneously turn on there are three switch unit, operating mode 1 of the invention only requires that two are opened with operating mode 2
Unit conducting is closed, can reduce loss.
Refering to what is shown in Fig. 1, the failure blocking ability of traditional CDSM is analyzed:
When positive fault current occurs, VT1, VT2, VT4, VT6, VT7 are turned off, and positive fault current is successively from afterflow two
Pole pipe VD1, capacitor C1, freewheeling diode VD4, capacitor C2, freewheeling diode VD7 flow through, capacitor C1, C2 serial connection charge, maximum
2U can be generatedCCounter electromotive force.
When reverse fault electric current occurs, VT1, VT2, VT4, VT6, VT7 are turned off, and reverse fault electric current is from afterflow two
Grade pipe VD6 is divided into Liang Zhi branch: first, through diode VD3, capacitor C1, then is arrived freewheeling diode VD2；Second through capacitor
C2, diode VD5, then arrive freewheeling diode VD2；Capacitor C1, C2 charged in parallel, maximum can generate 0.5UCCounter electromotive force.
Inverse-impedance type mixing submodule with failure blocking ability of the invention, by the VT7 and VD7 composition in traditional CDSM
The switch unit replacement that bidirectionally conductive-unidirectionally blocks has been set up with bidirectionally conductive-two-way blocking-up function switch unit, and is adjusted
The position for 3 devices being represented by dashed line in whole Fig. 1, but increase number of devices there is no additional, do not increasing device count
Amount, especially under conditions of capacitor element, realizes the promotion to reverse fault current blocking ability, to positive and negative direction failure
The blocking maximum capacity of electric current is 2UC.
The failure blocking-up method of inverse-impedance type mixing submodule with failure blocking ability of the invention, including following step
It is rapid:
Step 1: when an error occurs, shutdown first switch unit, second switch unit, third switch unit, the 4th switch are single
Member and the 5th switch unit；Since first switch unit, second switch unit, third switch unit and the 5th switch unit have
The unidirectional block function of bidirectionally conductive-, prevents fault current from passing through from insulated gate bipolar transistor after shutdown, but can be from
Freewheeling diode passes through；Since four switch units have the function of bidirectionally conductive-two-way blocking-up, prevent after shutdown fault current from
Pass through the 4th switch unit.
Step 2: judge fault current direction: if fault current is flowed into from the first feeder ear, for positive fault current, into
Enter step 3；If fault current is flowed into from the second feeder ear, for reverse fault current, 4 are entered step.
Step 3: refering to what is shown in Fig. 3, positive fault current passes sequentially through the freewheeling diode of first switch unit, the first electricity
Hold, the freewheeling diode of the freewheeling diode of third switch, the second capacitor, the 5th switch unit, and flowed out from the second feeder ear,
So that positive fault current was charging to concatenated first capacitor and the second capacitor charging, first capacitor and the second capacitor
Counter electromotive force is generated in journey to block fault current.
Step 4: refering to what is shown in Fig. 4, reverse fault electric current passes sequentially through the first clamp diode, the second capacitor, second
Clamp diode, first capacitor, second switch unit freewheeling diode, and from the first feeder ear flow out so that inversely
Fault current generates anti-electricity to concatenated first capacitor and the second capacitor charging, first capacitor and the second capacitor during the charging process
Kinetic potential blocks fault current.
The practical size for generating counter electromotive force is related with system failure electric current initial value and equivalent capacity to be had, and equivalent electricity
Hold smaller, fault current initial value is bigger, and failure blocking voltage is bigger.Failure blocking ability in the present invention refers to that maximum can
The counter electromotive force of generation, the inverse-impedance type mixing submodule maximum with failure blocking ability of the invention are capable of providing 2UCIt is anti-
Electromotive force blocks fault current.
Claims (5)
1. a kind of inverse-impedance type mixing submodule with failure blocking ability, it is characterised in that: including the first half-bridge submodule,
Two half-bridge submodules, the first clamp diode and the second clamp diode；The first half-bridge submodule includes first switch list
Member, second switch unit and first capacitor；The second half-bridge submodule includes third switch unit, the 4th switch unit,
Five switch units and the second capacitor；First capacitor is identical with the parameter of the second capacitor, and first capacitor and the second capacitor
Voltage reference value be UC；
First switch unit, second switch unit, third switch unit and the 5th switch unit are all made of insulated gate bipolar crystalline substance
The structure type of body pipe reverse parallel connection freewheeling diode, to have the unidirectional block function of bidirectionally conductive-, and with insulated gate bipolar
The conducting direction of transistor npn npn is forward conduction direction, using the conducting direction of freewheeling diode as reverse-conducting direction, and only
There is forward conduction direction that can be turned off；First switch unit, second switch unit, third switch unit and the 5th switch unit
Conducting refer to bidirectionally conductive, shutdown refers to that forward conduction direction is turned off；
4th switch unit uses the structure type of two insulated gate bipolar transistor reverse parallel connections, to have two-way lead
Logical-two-way blocking-up function；The conducting of 4th switch unit refers to bidirectionally conductive, and shutdown refers to two-way shutdown；
First switch unit is in parallel with first capacitor after connecting with second switch unit forward direction, i.e., first switch unit is opened with second
The forward conduction direction for closing unit is consistent, and first capacitor positive terminal is connect with first switch unit, first capacitor negative pole end and the
The connection of two switch units；The forward conduction direction of third switch unit and the forward conduction direction of first switch unit are consistent；The
Three switch units, first clamp diode in parallel after connecting with the 4th switch unit, and the anode of the first clamp diode and the
The connection of four switch units, the cathode of the first clamp diode are connect with third switch unit；Second capacitor negative pole end differential concatenation
5th switch unit, and the anode of the first clamp diode is connect with the 5th switch unit, the cathode of the first clamp diode
It is connect with the positive terminal of the second capacitor；Connect after first capacitor positive terminal the second clamp diode of series connection with the negative pole end of the second capacitor
It connects, and the anode of the second clamp diode is connect with the negative pole end of the second capacitor, the cathode of the second clamp diode and first
The positive terminal of capacitor connects, between the negative pole end access third switch unit of first capacitor and the 4th switch unit, thus by the
One half-bridge submodule is together in series with the second half-bridge submodule；
Indirect first feeder ear of first switch unit and second switch unit, the 4th switch unit, the 5th switch unit and
The tie point of one clamp diode connects the second feeder ear.
2. the inverse-impedance type mixing submodule according to claim 1 with failure blocking ability, it is characterised in that: pass through work
The switching of operation mode can export 0, UC、2UCThree kinds of operating voltages.
3. the inverse-impedance type mixing submodule according to claim 2 with failure blocking ability, it is characterised in that: have with
Lower four kinds of operational modules:
Operating mode 1: first switch unit, second switch unit and the 5th switch unit turn off, second switch unit and the 4th
Switching means conductive, so that first capacitor is bypassed with the second capacitor, external output voltage is 0；
Operating mode 2: second switch unit, third switch unit and the 5th switch unit turn off, first switch unit and the 4th
Switching means conductive, so that first capacitor is connected in series in circuit, the second capacitor is bypassed, and external output voltage is UC；
Operating mode 3: first switch unit and the 4th switch unit disconnect, second switch unit, third switch unit and the 5th
Switching means conductive, so that first capacitor is bypassed, the second capacitor is connected in series in circuit, and external output voltage is UC；
Operating mode 4: second switch unit and the 4th switch unit turn off, first switch unit, third switch unit and the 5th
Switching means conductive, so that first capacitor and the second capacitor are connected in series in circuit, external output voltage is 2UC。
4. the inverse-impedance type mixing submodule according to claim 1 with failure blocking ability, it is characterised in that: Neng Gouti
For 2UCCounter electromotive force fault current is blocked.
5. a kind of failure blocking side using the inverse-impedance type mixing submodule as described in claim 1 with failure blocking ability
Method, which comprises the following steps:
Step 1: when an error occurs, shutdown first switch unit, second switch unit, third switch unit, the 4th switch are single
Member and the 5th switch unit；
Step 2: judging fault current direction: if fault current is flowed into from the first feeder ear, for positive fault current, into step
Rapid 3；If fault current is flowed into from the second feeder ear, for reverse fault current, 4 are entered step；
Step 3: positive fault current pass sequentially through the freewheeling diode of first switch unit, first capacitor, third switch it is continuous
The freewheeling diode of diode, the second capacitor, the 5th switch unit is flowed, and is flowed out from the second feeder ear, so that positive event
Hinder electric current to concatenated first capacitor and the second capacitor charging, first capacitor generates anti-electronic during the charging process with the second capacitor
Gesture blocks fault current；
Step 4: reverse fault electric current passes sequentially through the first clamp diode, the second capacitor, the second clamp diode, the first electricity
Hold, the freewheeling diode of second switch unit, and flowed out from the first feeder ear, so that reverse fault current is to concatenated the
One capacitor and the second capacitor charging, first capacitor and the second capacitor generate counter electromotive force during the charging process and carry out to fault current
It blocks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910403040.3A CN110098598B (en) | 2019-05-15 | 2019-05-15 | Reverse-blocking type hybrid submodule with fault blocking capability and fault blocking method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910403040.3A CN110098598B (en) | 2019-05-15 | 2019-05-15 | Reverse-blocking type hybrid submodule with fault blocking capability and fault blocking method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110098598A true CN110098598A (en) | 2019-08-06 |
| CN110098598B CN110098598B (en) | 2020-09-29 |
Family
ID=67448042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910403040.3A Active CN110098598B (en) | 2019-05-15 | 2019-05-15 | Reverse-blocking type hybrid submodule with fault blocking capability and fault blocking method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110098598B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110890743A (en) * | 2019-11-25 | 2020-03-17 | 上海交通大学 | Low-loss modular multilevel DC transformer with fault blocking capability |
| CN110994974A (en) * | 2019-11-25 | 2020-04-10 | 上海交通大学 | Low-loss modular multi-level direct current-direct current converter and submodule thereof |
| CN112039360A (en) * | 2020-08-12 | 2020-12-04 | 华北电力大学（保定） | MMC submodule with fault current blocking and self-voltage-sharing capabilities |
| CN113489359A (en) * | 2021-06-24 | 2021-10-08 | 昆明理工大学 | Submodule topology with direct-current fault clearing capability |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611096A (en) * | 2012-03-13 | 2012-07-25 | 浙江大学 | Bipolar direct current power transmission system with direct current failure self-elimination capacity |
| CN104038090A (en) * | 2014-06-23 | 2014-09-10 | 威凡智能电气高科技有限公司 | T-shaped multi-level inverter circuit based on reverse blocking IGBT antiparallel connection |
| CN204068699U (en) * | 2014-09-11 | 2014-12-31 | 华南理工大学 | A kind of MMC submodule with direct-current short circuit fault self-cleaning ability |
| CN104638615A (en) * | 2015-02-16 | 2015-05-20 | 天津大学 | Modular multilevel converter with direct-current fault isolation function and submodule thereof |
| CN204835976U (en) * | 2015-07-22 | 2015-12-02 | 清华大学 | Take three many level of level modularization converter module circuit of short -circuit protection |
| US9806601B2 (en) * | 2015-03-27 | 2017-10-31 | Futurewei Technologies, Inc. | Boost converter and method |
| CN206602450U (en) * | 2016-11-10 | 2017-10-31 | 中国石油大学(华东) | A kind of MMC submodules with direct-current short circuit electric current self-cleaning ability |
| CN107370406A (en) * | 2017-08-29 | 2017-11-21 | 华北电力大学（保定） | The level MMC submodules of failure self-cleaning three and the transverter with the submodule |
| CN107947608A (en) * | 2017-12-06 | 2018-04-20 | 上海海事大学 | A kind of AC/DC current transformers with automatic equalization DC output voltage |
| CN108900103A (en) * | 2018-08-23 | 2018-11-27 | 中国能源建设集团广东省电力设计研究院有限公司 | The converter power module and inverter for having DC Line Fault self-cleaning ability |
-
2019
- 2019-05-15 CN CN201910403040.3A patent/CN110098598B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611096A (en) * | 2012-03-13 | 2012-07-25 | 浙江大学 | Bipolar direct current power transmission system with direct current failure self-elimination capacity |
| CN104038090A (en) * | 2014-06-23 | 2014-09-10 | 威凡智能电气高科技有限公司 | T-shaped multi-level inverter circuit based on reverse blocking IGBT antiparallel connection |
| CN204068699U (en) * | 2014-09-11 | 2014-12-31 | 华南理工大学 | A kind of MMC submodule with direct-current short circuit fault self-cleaning ability |
| CN104638615A (en) * | 2015-02-16 | 2015-05-20 | 天津大学 | Modular multilevel converter with direct-current fault isolation function and submodule thereof |
| US9806601B2 (en) * | 2015-03-27 | 2017-10-31 | Futurewei Technologies, Inc. | Boost converter and method |
| CN204835976U (en) * | 2015-07-22 | 2015-12-02 | 清华大学 | Take three many level of level modularization converter module circuit of short -circuit protection |
| CN206602450U (en) * | 2016-11-10 | 2017-10-31 | 中国石油大学(华东) | A kind of MMC submodules with direct-current short circuit electric current self-cleaning ability |
| CN107370406A (en) * | 2017-08-29 | 2017-11-21 | 华北电力大学（保定） | The level MMC submodules of failure self-cleaning three and the transverter with the submodule |
| CN107947608A (en) * | 2017-12-06 | 2018-04-20 | 上海海事大学 | A kind of AC/DC current transformers with automatic equalization DC output voltage |
| CN108900103A (en) * | 2018-08-23 | 2018-11-27 | 中国能源建设集团广东省电力设计研究院有限公司 | The converter power module and inverter for having DC Line Fault self-cleaning ability |
Non-Patent Citations (1)
| Title |
|---|
| 罗永捷: "MMC-MTDC系统直流单级对地短路故障保护策略", 《电工技术学报》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110890743A (en) * | 2019-11-25 | 2020-03-17 | 上海交通大学 | Low-loss modular multilevel DC transformer with fault blocking capability |
| CN110994974A (en) * | 2019-11-25 | 2020-04-10 | 上海交通大学 | Low-loss modular multi-level direct current-direct current converter and submodule thereof |
| CN110994974B (en) * | 2019-11-25 | 2020-11-20 | 上海交通大学 | Low-loss modular multi-level direct current-direct current converter and submodule thereof |
| CN110890743B (en) * | 2019-11-25 | 2020-11-20 | 上海交通大学 | Low-loss modular multilevel DC transformer with fault blocking capability |
| CN112039360A (en) * | 2020-08-12 | 2020-12-04 | 华北电力大学（保定） | MMC submodule with fault current blocking and self-voltage-sharing capabilities |
| CN113489359A (en) * | 2021-06-24 | 2021-10-08 | 昆明理工大学 | Submodule topology with direct-current fault clearing capability |
| CN113489359B (en) * | 2021-06-24 | 2023-11-28 | 昆明理工大学 | Submodule topology with direct-current fault clearing capability |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110098598B (en) | 2020-09-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110098598A (en) | Inverse-impedance type mixing submodule and its failure blocking-up method with failure blocking ability | |
| CN102075110B (en) | Systems and methods for commutating inductor current using matrix converter | |
| US9083189B2 (en) | Device and method for equalizing voltages of energy-storage elements | |
| CN206602450U (en) | A kind of MMC submodules with direct-current short circuit electric current self-cleaning ability | |
| CN102255538B (en) | T-shaped three-level inverter circuit | |
| CN103944430B (en) | A kind of modularization multi-level converter subelement topology | |
| CN109995258A (en) | A kind of inverse-impedance type diode clamp bit submodule and its fault current blocking-up method | |
| CN103986177B (en) | LCC-HVDC topological structure into which controllable sub-modules are connected in series | |
| CN107968586A (en) | A kind of active clamp tri-level circuit and DC converter | |
| CN102522882A (en) | Protection circuit of converter power component | |
| CN105281361B (en) | A kind of five-level double step-down combining inverter | |
| CN110535359A (en) | A kind of diode clamp mixing MMC circuit with from equal pressure energy power | |
| CN105871205A (en) | Integrated multifunctional power source switching system | |
| CN204068699U (en) | A kind of MMC submodule with direct-current short circuit fault self-cleaning ability | |
| CN108900103A (en) | The converter power module and inverter for having DC Line Fault self-cleaning ability | |
| CN111030493A (en) | Submodule of modular multilevel converter and protection circuit thereof | |
| CN207265895U (en) | DC Line Fault passes through MMC submodules and the transverter with the submodule | |
| CN111800030B (en) | Multi-level inverter circuit and system based on switch capacitor and diode clamp | |
| CN209170243U (en) | A kind of modularization multi-level converter | |
| CN105262355A (en) | Multiport inverter | |
| CN108092517A (en) | The circuit that a kind of vehicle-mounted charge is connected with DCDC | |
| CN102420538B (en) | Diode clamping seven-level DC-AC (direct current and alternate current) transformation circuit | |
| CN207265879U (en) | Possess the MMC submodules of fault clearance and the transverter with the submodule | |
| CN111200366A (en) | MMC submodule topological structure of equivalent full-bridge submodule with direct-current fault blocking capability | |
| CN106533218B (en) | A kind of rectified three-phase circuit and drive control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |