CN201323531Y - 6KV high-voltage transducer directly composed of three-level H-bridge power unit module - Google Patents
6KV high-voltage transducer directly composed of three-level H-bridge power unit module Download PDFInfo
- Publication number
- CN201323531Y CN201323531Y CNU2008202388702U CN200820238870U CN201323531Y CN 201323531 Y CN201323531 Y CN 201323531Y CN U2008202388702 U CNU2008202388702 U CN U2008202388702U CN 200820238870 U CN200820238870 U CN 200820238870U CN 201323531 Y CN201323531 Y CN 201323531Y
- Authority
- CN
- China
- Prior art keywords
- level
- fast recovery
- link
- power unit
- recovery 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.)
- Expired - Lifetime
Links
Images
Abstract
The utility model relates to a 6KV high-voltage transducer directly composed of three-level H-bridge power unit modules. The transducer comprises a 36 pulse wave isolation transformer, three three-level H-bridge power unit modules (A, B and C) and a filtering wave output device, wherein the isolation transformer comprises a three-phase winding and six secondary windings; each two secondary windings form a group and are respectively connected with the rectification link of the three three-level H-bridge power unit modules; the rectification link of the three-level H-bridge power unit modules forms 36 filtering waves totally; the output end of the three three-level H-bridge power unit modules is connected with the corresponding input end of the filtering wave output device which is used for outputting the filtering waves of the voltage output by the three-level H-bridge power unit modules so as to obtain sine wave alternating current with relatively low harmonic wave content.
Description
Technical field
The utility model belongs to Electric Traction, power converter and electric and electronic technical field, is specifically related to a kind of 6KV high voltage converter that directly is made of three level H-bridge power unit modules.
Background technology
In using electricity system, motor is widely used in industrial and agricultural production, national defence, science and technology, and various aspects such as social life as main power-equipment, be used to drive the same enormous amount of big capacity medium and high-voltage asynchronous motor of blower fan, water pump, the load of compressor class therein, specifically be applied in industries such as thermal power generation, metallurgy, oil, chemical industry, cement, mine, urban water supply.In concrete the application, satisfy the production demand, not only caused the serious waste of energy owing to for many years adopt baffle plate and valve to regulate flow always, and whole production system equipment is produced impact and wearing and tearing.Along with the development of high-power electric and electronic technology, high voltage converter is applied in the above-mentioned field that needs speed governing day by day, has played obvious energy-saving effect.
Because the finiteness of current power device withstand voltage grade, domestic frequency converter mainly adopts two kinds of topological structures.A kind of is the series multiplex structure that adopts two level H-bridge power cells; Another kind is the three level structures that adopt the power device series connection.
Adopt the series multiplex structure of two level H-bridge power cells, its main thought is to adopt the low switching device component units of voltage withstand class, and units in series obtains high voltage output then.This structure has remedied the deficiency of existing power device voltage endurance capability, but the power device quantity of its use is too many, and the volume of device is big, and weight is big.Because element number is many, the number of power sources that needs is also many, makes that required isolating transformer secondary winding quantity and leading-out terminal are many simultaneously, and high-tension cable is too many, and system's internal resistance increases virtually.Wiring is too many, increases thereby the fault point is also corresponding, and reliability reduces.Because the unit is the H bridge construction of two level, the dV/dt height of its output voltage produces high common-mode voltage, withstand voltage unfavorable to whole system.
Adopt three level structures of power device series connection, few (phase voltage three level of the level number of output voltage, line voltage five level), produce big harmonic component in the output waveform inevitably, because harmonic wave, power of electric motor factor and efficient even life-span all can be subjected to certain influence; The dV/dt height of same its output voltage produces high common-mode voltage, withstand voltage unfavorable to whole system.Because the withstand voltage level of existing power device restriction, each switch module must just can be met the demands by two even the series connection of three power devices in this structure, bring the synchronism problem of all pressures of series connection power device, equal flow problem and control series connection power device switch thus, these two problems are key problems of present this kind structure, the reliability of system also will be affected, and lose three level structures advantage aspect equal pressures simultaneously.
Summary of the invention
The purpose of this utility model provides a kind of 6KV high voltage converter that directly is made of three level H-bridge power unit modules at existing weak point in the above-mentioned prior art just.
The utility model adopts three level H-bridge topological structures as power model, make full use of all pressures advantage of three Level Technology, the voltage withstand class that the present power component of foundation can reach, with the output voltage of power model a phase voltage as frequency converter output, need not the power device series connection, output voltage can reach 3900V, is higher than the phase voltage 3450V of present 6KV high-voltage motor.
The purpose of this utility model can realize by following technical measures:
The 6KV high voltage converter that the purpose of this utility model directly is made of three level H-bridge power unit modules comprises 36 pulse wave isolating transformers, three three level H-bridge power unit modules and exports filter; Wherein: isolating transformer comprises former limit three phase windings and six groups of windings of secondary, the output voltage of every group of winding of secondary with respect to the phase place of reference voltage be followed successively by+25 ° ,+15 ° ,+5 ° ,-5 ° ,-15 ° ,-25 °; Per two groups of secondary are around being one group of input rectifying link that connects three three level H-bridge power unit modules respectively, the rectification link of three level H-bridge power unit modules is the 12 pulse wave rectifier bridges that two 6 pulse wave rectifier bridges are composed in series, and the rectification link of three three level H-bridge power unit modules is formed 36 pulse waves altogether; The respective input of described three level H-bridge power unit modules output termination output filter, the output filter is used for the filtering of three level H-bridge power unit module output voltages, obtains the fewer sine wave alternating current of harmonic content.
Three three level H-bridge power unit modules described in the utility model are identical, have interchangeability; Each three level H-bridge power unit module comprises: rectification link, positive and negative to charge protection loop, DC link, current limliting link, inversion link.
Positive charge protection loop in the described three level H-bridge power unit modules is by the electronic switch S that adopts parallel way to be electrically connected
1, current-limiting resistance R
1With piezo-resistance MY
1Form; Negative sense charge protection loop is by the electronic switch S that adopts parallel way to be electrically connected
2, current-limiting resistance R
2With piezo-resistance MY
2Form.
In the described three level H-bridge power unit modules the inversion link compose in parallel by two tri-level inversion brachium pontis: power device V
A1, V
A2, V
A3, V
A4Be connected into a branch road, power device V
A5, V
A6, V
A7, V
A8Be connected into a branch road, fast recovery diode D
A1, D
A2Be connected into a branch road, fast recovery diode D
A3, D
A4Be connected into a branch road; By fast recovery diode D
A1, D
A2The branch road that series connection constitutes is attempted by power device V
A1And V
A2Node and power device V
A3And V
A4Node between, by fast recovery diode D
A3, D
A4The branch road that series connection constitutes is attempted by power device V
A5And V
A6Node and power device V
A7And V
A8Node between, be used for realizing zero level, constitute two neutral point clamper type three level brachium pontis; At fast recovery diode D
A1, D
A2The series arm two ends also meet a biasing resistor R
A1, at fast recovery diode D
A3, D
A4The series arm two ends also meet a biasing resistor R
A2, diode D during in order to the assurance zero level
A1Or D
A3Be in conducting state, make power device V
A1And V
A2Between and V
A3And V
A4Between realize all pressing, need not take other additionally all to press measure, thereby reduce circuit loss; Fast recovery diode D
A1And D
A2Connected node and fast recovery diode D
A3And D
A4Connected node all be connected to the mid point of DC link; Power device V
A2And V
A3Node be connected to the corresponding points of other two power cells, connect neutral point as the star of three power cells; Power device V
A6And V
A7Node be connected to output inductor, as the output of power cell alternating voltage.
Current limliting link in the described three level H-bridge power unit modules comprises fast recovery diode D
C1, capacitor C
C1, capacitor C
C2, fast recovery diode D
C3The series connection back is in parallel with inversion link (12) successively, fast recovery diode D
C1And capacitor C
C1Node meet absorption resistance R
C1, fast recovery diode D
C1With absorption resistance R
C1After the connection together with current-limiting inductance L
C1Parallel connection, fast recovery diode D
C3And capacitor C
C2Node meet absorption resistance R
C2, fast recovery diode D
C3With absorption resistance R
C3After the connection together with current-limiting inductance L
C2Parallel connection is by the above common restrictor ring joint (10) of forming; Fast recovery diode D
C2, capacitor C
C3, capacitor C
C4, fast recovery diode D
C4The series connection back is in parallel with inversion link (13) successively, fast recovery diode D
C2And capacitor C
C3Node meet absorption resistance R
C2, fast recovery diode D
C2With absorption resistance R
C2After the connection together with current-limiting inductance L
C1Parallel connection, fast recovery diode D
C4And capacitor C
C4Node meet absorption resistance R
C4, fast recovery diode D
C4With absorption resistance R
C4After the connection together with current-limiting inductance L
C2Parallel connection is by the above common current limliting link (11) of forming inversion link (13); Shared two inductance L of two cover current limliting links
C1And L
C2Inductance L
C1And L
C2Two ends respectively and meet quick short-circuit detecting unit T
V3And T
V4, be used to monitor inductance L
C1And L
C2In electric current; Capacitor C
C1And capacitor C
C2Node and capacitor C
C3And capacitor C
C4Node all be connected to the mid point of DC link.
Rectification link in the described three level H-bridge power unit modules is not controlled rectifier bridge by two group of 6 pulse wave diode and is composed in series, and the tie point of two groups of rectifier bridges is as the mid point of DC link; DC link is by dc filter capacitor C
1And C
2Be composed in series, the node of two electric capacity connects the mid point of two groups of rectifier bridges.
The filter of output described in the utility model is by inductance L
a, L
b, L
cAnd capacitor C
a, C
b, C
cConstitute each inductance L
a, L
b, L
cAn end be connected in series a capacitor C respectively
a, C
b, C
c, the other end is the input of output filter, and the other end of electric capacity links together and becomes neutral point N, and neutral point N connects the earth; The tie point of inductance and electric capacity is as the output of output filter, i.e. output U, V, the W of frequency converter; Between the line of output U, V, W difference cross-over connection piezo-resistance MY between UV, VW, WU
Ab, MY
Bc, MY
CaDeng, be used to prevent of the impact of the overvoltage of output to power cell.
The high voltage converter that the utility model mainly is made of three three level H-bridge power unit modules, make full use of the modular thought of two level H-bridge power unit cascade multiple inverter configuration frequency converters, be better than two level H-bridge power unit cascade multiple inverter configuration frequency converters simultaneously.A unit output voltage is brought up to three level by two level, adopts existing high-voltage power components and parts, need not the operating voltage that units in series just can satisfy current high-voltage motor.Output line voltage can reach 6.9KV.Be applied to more voltage levels as need, also can utilize the thought of series multiplex structure frequency converter that the series connection of three level H-bridge power unit modules is used, compare two level H-bridge power unit cascade multiple inverter configuration frequency converters, reach same output voltage grade, required power supply number can reduce half, and the output-voltage levels number is identical.
The beneficial effects of the utility model are as follows:
(1) provide a kind of high performance components of existing voltage withstand class that utilizes to need not directly formation high voltage converter of series connection use, output need not increasing apparatus.
(2) the unit-modularized interchangeability that helps system makes things convenient for system extension, to be suitable for the use of more occasions.
(3) charging of power cell and protection loop unite two into one; electronic switch disconnected the charging current that helps alleviating dc filter capacitor when frequency converter powered on; utilize the rapidity of electronic switch can protect fast the unit when the system failure, the low-loss that electronic switch is kept on-state under system's normal operating conditions helps improving system effectiveness.
(4) inversion circuit of power cell has solved all pressures problem of power device with bigoted resistance, does not need other additional moving static state voltage equipoise measures, has reduced circuit loss.
(5) the shared cover current-limiting inductance of two of power cell cover current limliting links, system configuration is simple, conveniently carries out fault detect; The electric capacity of current limliting link is discrete to help reducing the influence of the stray inductance of circuit to the power device switch, and apparatus structure is tightly short, makes the stray inductance of circuit be reduced to minimum.
Description of drawings
Fig. 1 is three level H-bridge power unit module schematic diagrams.
Fig. 2 is 3 the three three-phase inverter schematic diagrams that electric H bridge power unit constitutes.
Fig. 3 is the three-phase inverter schematic diagram of 2 the three level H-bridge power unit cascades formations of every phase of expansion.
Fig. 4 is the directly topology diagrams of the 6KV high voltage converter of formation of three level H-bridge power cells.
Fig. 5 is the directly structural principle block diagrams of the 6KV high voltage converter of formation of three level H-bridge power cells.
Fig. 6 is three level H-bridge power unit module topology diagrams.
Fig. 7 is output filter topology diagram.
Embodiment
The utility model is described further below with reference to embodiment (accompanying drawing):
Shown in Fig. 4,5, this frequency converter comprises one 36 pulse wave isolating transformer (1), three identical independently three level H-bridge power unit module A (2), B (3), C (4) and one group of output filter (5); The input AC electricity obtains six groups of three-phase alternating-current supplies after isolating transformer phase shift transformation, wherein the line voltage of every group of AC power is 1920V, and wherein per two groups are one group and supply with three independently three level H-bridge power unit modules respectively; Alternating current is exported behind the inner process of power unit module commutation inversion, and wherein an end is exported 5 level phase voltages, and the other end is a common port, and the output common port star of three unit is connected together; The sine wave that becomes rule behind the 5 level phase voltages process output filter of unit output is powered to load motor.
As shown in Figure 6, each power cell all comprises rectification link, charge protection link, DC link, current limliting link and inversion link etc.
Behind the three-phase alternating-current supply ingoing power unit by two groups of next dislocation phase shifts of isolating transformer secondary, enter two group of six pulse wave diode respectively and do not control rectification link (D
1～D
6And D
7～D
12), the output series connection of two groups of rectifier bridges constitutes 12 pulse wave rectifier circuit, exports the direct current of 12 pulse waves, and output voltage is (5～6) KV.The output voltage effective value that guarantees each unit can reach 3900V.
Direct current by the output of rectification link enters the charge protection link.Electronic switch S
1, current-limiting resistance R
1With piezo-resistance MY
1Compose in parallel positive charge protection loop; Electronic switch S
2, current-limiting resistance R
2With piezo-resistance MY
2Compose in parallel negative sense charge protection loop.When system powers on, electronic switch S
1, S
2Turn-off the current-limiting resistance R that flows through of the direct current after the rectification
1, R
2To the DC link capacitor C
1And C
2Charge, be used to reduce powered on moment and shove the impact of system; When system's operate as normal, electronic switch S
1, S
2Open-minded, the loss of voltage when reducing work; When the system failure, electronic switch S
1, S
2Can turn-off fast, switch to the low current charge pattern rapidly, in order to protect whole follow-up system; Piezo-resistance MY
1, MY
2Be used to protect electronic switch S
1, S
2Avoiding high voltage impacts.
The DC link capacitor C
1And C
2Carry out filtering and energy storage in order to direct current, obtain more level and smooth galvanic current source 12 pulse waves; The connected node of two electric capacity links to each other with the tie point of two rectifier bridges of rectification link, as the neutral point of whole power cell, in order to direct current is carried out clamper, obtains the direct current of three level.
Through the direct current of DC link clamper filtering, the current limliting link that positive pole and negative pole enter positive negative sense respectively, neutral point connects the neutral point of inversion link.Inductance L
C1And L
C2The current changing rate that is used for restricting circuits is alleviated the impact of big electric current to the inversion link.Quick short-circuit detecting unit T
V3And T
V4By detecting inductance L
C1And L
C2The change in voltage at two ends is used to monitor inductance L
C1And L
C2In electric current change, in case the system failure produces overcurrent, detecting unit T
V3And T
V4Can send signal rapidly and give the electronic switch S of insured's link
1, S
2System is protected.Resistance R
C1, R
C2, R
C3, R
C4Be used to consume inductance L
C1And L
C2Middle electric current changes the energy that is produced, and capacitor C
C1, C
C2, C
C3, C
C4Direct voltage is stable when coming together to keep system works, and resistance and electric capacity are installed together with two inverter bridge respectively, help reducing the influence of the stray inductance of circuit to the power device switch, and apparatus structure is tightly short, makes the stray inductance of circuit be reduced to minimum.
The inversion link is composed in parallel by two tri-level inversion brachium pontis: power device V
A1, V
A2, V
A3, V
A4Be connected into a branch road, power device V
A5, V
A6, V
A7, V
A8Be connected into a branch road, fast recovery diode D
A1, D
A2Be connected into a branch road, fast recovery diode D
A3, D
A4Be connected into a branch road.By fast recovery diode D
A1, D
A2The branch road that series connection constitutes is attempted by power device V
A1And V
A2Node and power device V
A3And V
A4Node between, by fast recovery diode D
A3, D
A4The branch road that series connection constitutes is attempted by power device V
A5And V
A6Node and power device V
A7And V
A8Node between, be used for realizing zero level, constitute two neutral point clamper type three level brachium pontis.At fast recovery diode D
A1, D
A2The series arm two ends also meet a biasing resistor R
A1, at fast recovery diode D
A3, D
A4The series arm two ends also meet a biasing resistor R
A2, diode D during in order to the assurance zero level
A1Or D
A3Be in conducting state, make power device V
A1And V
A2Between and V
A3And V
A4Between realize all pressing, need not take other additionally all to press measure, thereby reduce circuit loss.Fast recovery diode D
A1And D
A2Connected node and fast recovery diode D
A3And D
A4Connected node all be connected to the mid point of DC link.Power device V
A2And V
A3Node be connected to the corresponding points of other two power cells, connect neutral point as the star of three power cells; Power device V
A6And V
A7Node be connected to output inductor, as the output of power cell alternating voltage.
As shown in Figure 7, the output of the voltage of three three level H-bridge power cells inserts the output filter, is used for the filtering of three level H-bridge power unit module output voltages, and process LC filtering obtains the fewer sine wave alternating current of harmonic content and powers to load motor.The output filter is by inductance L
a, L
b, L
cAnd capacitor C
a, C
b, C
cConstitute each inductance L
a, L
b, L
cAn end be connected in series a capacitor C respectively
a, C
b, C
c, the other end is the input of output filter, and the other end of electric capacity links together and becomes neutral point N, and neutral point N connects the earth; The tie point of inductance and electric capacity is as the output of output filter, i.e. output U, V, the W of frequency converter; Between the line of output U, V, W difference cross-over connection piezo-resistance MY between UV, VW, WU
Ab, MY
Bc, MY
CaDeng, be used to prevent of the impact of the overvoltage of output to power cell.
As shown in Figure 1, three level H-bridge power unit modules adopt diode clamp three-level inverter technology, constitute a power cell by the parallel connection of two three level brachium pontis, and unit output can obtain five level voltages, and wherein the output voltage of left brachium pontis is U
a, the output voltage of right brachium pontis is U
b, left and right brachium pontis all adopts SPWM control.Carrier wave adopts anti-phase triangular wave overlapped way.The triangular carrier initial phase angle of left side brachium pontis is α
1, the triangular carrier initial phase angle of right brachium pontis is α
2, wherein: 1+180 ° of α 2=α, left and right brachium pontis adopt anti-phase sine wave as modulating wave, so that the output voltage U of left and right brachium pontis
aAnd U
bHas the opposite fundamental voltage of equal and opposite in direction phase place so that stack.
Compare with two level H-bridge power cells: the same level number of (1) output, the required independent DC power supply number in three level power unit reduces half; (2) when the electric pressure of independent current source was identical, the components and parts of three level power unit bore voltage drop and are at half; When (3) output voltage was identical, when forming with three level power unit, required unit number reduced half; (4) the output level number more for a long time, circuit is simple, control is simple.
With the output of three one of them brachium pontis of level power unit as common port, an output mutually of three-phase voltage is used as in another brachium pontis output, can form the simplest three-phase inverter by three three level power unit, output level is counted phase voltage 5 level, line voltage 9 level (as shown in Figure 2).
This inverter adopts the modular construction compact design, can realize optimum many level outputs, exports same level number, and the voltage withstand class of required components and parts is low, and number of devices is few, and control is simple.Also can carry out the units in series expansion, to reach higher output voltage grade (as shown in Figure 3).
Claims (7)
1, a kind of 6KV high voltage converter that directly is made of three level H-bridge power unit modules is characterized in that: this frequency converter comprises 36 pulse wave isolating transformers, three three level H-bridge power unit modules (A, B, C) and output filter; Wherein: isolating transformer comprises former limit three phase windings and six groups of windings of secondary, the output voltage of every group of winding of secondary with respect to the phase place of reference voltage be followed successively by+25 ° ,+15 ° ,+5 ° ,-5 ° ,-15 ° ,-25 °; Per two groups of secondary are around being one group of input rectifying link that connects three three level H-bridge power unit modules respectively, the rectification link of three level H-bridge power unit modules is the 12 pulse wave rectifier bridges that two 6 pulse wave rectifier bridges are composed in series, and the rectification link of three three level H-bridge power unit modules is formed 36 pulse waves altogether; The respective input of described three level H-bridge power unit modules output termination output filter, the output filter is used for the filtering of three level H-bridge power unit module output voltages, obtains the fewer sine wave alternating current of harmonic content.
2, frequency converter according to claim 1 is characterized in that: three three level H-bridge power unit modules (A, B, C) are identical, have interchangeability; Each three level H-bridge power unit module comprises: rectification link, positive and negative to charge protection loop, DC link, current limliting link, inversion link.
3, frequency converter according to claim 1 is characterized in that: described output filter is by inductance L
a, L
b, L
cAnd capacitor C
a, C
b, C
cConstitute each inductance L
a, L
b, L
cAn end be connected in series a capacitor C respectively
a, C
b, C
c, the other end is the input of output filter, and the other end of electric capacity links together and becomes neutral point N, and neutral point N connects the earth; The tie point of inductance and electric capacity is as the output of output filter, i.e. output U, V, the W of frequency converter; Between the line of output U, V, W difference cross-over connection piezo-resistance MY between UV, VW, WU
Ab, MY
Bc, MY
CaDeng, be used to prevent of the impact of the overvoltage of output to power cell.
4, frequency converter according to claim 2 is characterized in that: the positive charge protection loop in the described three level H-bridge power unit modules is by the electronic switch S that adopts parallel way to be electrically connected
1, current-limiting resistance R
1With piezo-resistance MY
1Form; Negative sense charge protection loop is by the electronic switch S that adopts parallel way to be electrically connected
2, current-limiting resistance R
2With piezo-resistance MY
2Form.
5, frequency converter according to claim 2 is characterized in that: in the described three level H-bridge power unit modules the inversion link compose in parallel by two tri-level inversion brachium pontis: power device V
A1, V
A2, V
A3, V
A4Be connected into a branch road, power device V
A5, V
A6, V
A7, V
A8Be connected into a branch road, fast recovery diode D
A1, D
A2Be connected into a branch road, fast recovery diode D
A3, D
A4Be connected into a branch road; By fast recovery diode D
A1, D
A2The branch road that series connection constitutes is attempted by power device V
A1And V
A2Node and power device V
A3And V
A4Node between, by fast recovery diode D
A3, D
A4The branch road that series connection constitutes is attempted by power device V
A5And V
A6Node and power device V
A7And V
A8Node between, be used for realizing zero level, constitute two neutral point clamper type three level brachium pontis; At fast recovery diode D
A1, D
A2The series arm two ends also meet a biasing resistor R
A1, at fast recovery diode D
A3, D
A4The series arm two ends also meet a biasing resistor R
A2, diode D during in order to the assurance zero level
A1Or D
A3Be in conducting state, make power device V
A1And V
A2Between and V
A3And V
A4Between realize all pressing, need not take other additionally all to press measure, thereby reduce circuit loss; Fast recovery diode D
A1And D
A2Connected node and fast recovery diode D
A3And D
A4Connected node all be connected to the mid point of DC link; Power device V
A2And V
A3Node be connected to the corresponding points of other two power cells, connect neutral point as the star of three power cells; Power device V
A6And V
A7Node be connected to output inductor, as the output of power cell alternating voltage.
6, frequency converter according to claim 2 is characterized in that: the current limliting link in the described three level H-bridge power unit modules comprises fast recovery diode D
C1, capacitor C
C1, capacitor C
C2, fast recovery diode D
C3The series connection back is in parallel with inversion link (12) successively, fast recovery diode D
C1And capacitor C
C1Node meet absorption resistance R
C1, fast recovery diode D
C1With absorption resistance R
C1After the connection together with current-limiting inductance L
C1Parallel connection, fast recovery diode D
C3And capacitor C
C2Node meet absorption resistance R
C2, fast recovery diode D
C3With absorption resistance R
C3After the connection together with current-limiting inductance L
C2Parallel connection is by the above common restrictor ring joint (10) of forming; Fast recovery diode D
C2, capacitor C
C3, capacitor C
C4, fast recovery diode D
C4The series connection back is in parallel with inversion link (13) successively, fast recovery diode D
C2And capacitor C
C3Node meet absorption resistance R
C2, fast recovery diode D
C2With absorption resistance R
C2After the connection together with current-limiting inductance L
C1Parallel connection, fast recovery diode D
C4And capacitor C
C4Node meet absorption resistance R
C4, fast recovery diode D
C4With absorption resistance R
C4After the connection together with current-limiting inductance L
C2Parallel connection is by the above common current limliting link (11) of forming inversion link (13); Shared two inductance L of two cover current limliting links
C1And L
C2Inductance L
C1And L
C2Two ends respectively and meet quick short-circuit detecting unit T
V3And T
V4, be used to monitor inductance L
C1And L
C2In electric current; Capacitor C
C1And capacitor C
C2Node and capacitor C
C3And capacitor C
C4Node all be connected to the mid point of DC link.
7, frequency converter according to claim 2 is characterized in that: the rectification link in the described three level H-bridge power unit modules is not controlled rectifier bridge by two group of 6 pulse wave diode and is composed in series, and the tie point of two groups of rectifier bridges is as the mid point of DC link; DC link is by dc filter capacitor C
1And C
2Be composed in series, the node of two electric capacity connects the mid point of two groups of rectifier bridges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202388702U CN201323531Y (en) | 2008-12-29 | 2008-12-29 | 6KV high-voltage transducer directly composed of three-level H-bridge power unit module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202388702U CN201323531Y (en) | 2008-12-29 | 2008-12-29 | 6KV high-voltage transducer directly composed of three-level H-bridge power unit module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201323531Y true CN201323531Y (en) | 2009-10-07 |
Family
ID=41160903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202388702U Expired - Lifetime CN201323531Y (en) | 2008-12-29 | 2008-12-29 | 6KV high-voltage transducer directly composed of three-level H-bridge power unit module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201323531Y (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035402A (en) * | 2010-11-24 | 2011-04-27 | 中国船舶重工集团公司第七一二研究所 | Integrated gate-commutated thyristor (IGCT)-based hybrid cascaded H-bridge multi-level high-voltage inverter |
| CN102255312A (en) * | 2011-06-29 | 2011-11-23 | 安徽省电力科学研究院 | Method for inhibiting switch burrs of back-to-back harmonic source |
| CN102355195A (en) * | 2011-10-24 | 2012-02-15 | 乔鸣忠 | Multi-inverter module paralleling frequency conversion device for transmission system and control policy |
| CN103178721A (en) * | 2013-04-07 | 2013-06-26 | 冶金自动化研究设计院 | High-capacity five-level converter power cabinet |
| CN103219909A (en) * | 2013-03-29 | 2013-07-24 | 上海交通大学 | Integrated gate commutated thyristor five-level power module |
| WO2013149458A1 (en) * | 2012-04-01 | 2013-10-10 | 广东易事特电源股份有限公司 | Ups power source based on phase-shifting auto-transformer and dual 6-pulse rectifiers |
| WO2013155819A1 (en) * | 2012-04-20 | 2013-10-24 | 广东易事特电源股份有限公司 | Symmetrical ups power system based on nine-phase self-coupling phase-shifting transformer |
| CN104883075A (en) * | 2015-06-26 | 2015-09-02 | 西安交通大学 | Novel cascaded 6kV mining high-voltage explosion-proof frequency converter |
| CN105610310A (en) * | 2015-12-28 | 2016-05-25 | 深圳市库马克新技术股份有限公司 | Frequency converter drive circuit and short-circuit detection method therefor |
| CN105790598A (en) * | 2016-04-20 | 2016-07-20 | 中国船舶重工集团公司第七〇二研究所 | Highly-reliable main circuit topological structure of railway ground deflector |
| CN107171568A (en) * | 2017-06-19 | 2017-09-15 | 上海电气富士电机电气技术有限公司 | A kind of three level power unit main circuits and cascade high voltage RHVC |
| CN109625228A (en) * | 2018-10-09 | 2019-04-16 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） | A kind of permanent magnetism propulsion system topology |
| DE102021114207A1 (en) | 2021-06-01 | 2022-12-01 | Convertertec Deutschland Gmbh | Circuit arrangement for providing electrical power for large DC loads |
-
2008
- 2008-12-29 CN CNU2008202388702U patent/CN201323531Y/en not_active Expired - Lifetime
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035402B (en) * | 2010-11-24 | 2013-01-30 | 中国船舶重工集团公司第七一二研究所 | Integrated gate-commutated thyristor (IGCT)-based hybrid cascaded H-bridge multi-level high-voltage inverter |
| CN102035402A (en) * | 2010-11-24 | 2011-04-27 | 中国船舶重工集团公司第七一二研究所 | Integrated gate-commutated thyristor (IGCT)-based hybrid cascaded H-bridge multi-level high-voltage inverter |
| CN102255312A (en) * | 2011-06-29 | 2011-11-23 | 安徽省电力科学研究院 | Method for inhibiting switch burrs of back-to-back harmonic source |
| CN102355195A (en) * | 2011-10-24 | 2012-02-15 | 乔鸣忠 | Multi-inverter module paralleling frequency conversion device for transmission system and control policy |
| WO2013149458A1 (en) * | 2012-04-01 | 2013-10-10 | 广东易事特电源股份有限公司 | Ups power source based on phase-shifting auto-transformer and dual 6-pulse rectifiers |
| WO2013155819A1 (en) * | 2012-04-20 | 2013-10-24 | 广东易事特电源股份有限公司 | Symmetrical ups power system based on nine-phase self-coupling phase-shifting transformer |
| CN103219909A (en) * | 2013-03-29 | 2013-07-24 | 上海交通大学 | Integrated gate commutated thyristor five-level power module |
| CN103178721B (en) * | 2013-04-07 | 2015-09-02 | 冶金自动化研究设计院 | A kind of high-capacity five-level converter power cabinet |
| CN103178721A (en) * | 2013-04-07 | 2013-06-26 | 冶金自动化研究设计院 | High-capacity five-level converter power cabinet |
| CN104883075A (en) * | 2015-06-26 | 2015-09-02 | 西安交通大学 | Novel cascaded 6kV mining high-voltage explosion-proof frequency converter |
| CN105610310A (en) * | 2015-12-28 | 2016-05-25 | 深圳市库马克新技术股份有限公司 | Frequency converter drive circuit and short-circuit detection method therefor |
| CN105610310B (en) * | 2015-12-28 | 2018-12-21 | 深圳市库马克新技术股份有限公司 | Transducer drive circuit and its method for detecting short circuit |
| CN105790598A (en) * | 2016-04-20 | 2016-07-20 | 中国船舶重工集团公司第七〇二研究所 | Highly-reliable main circuit topological structure of railway ground deflector |
| CN107171568A (en) * | 2017-06-19 | 2017-09-15 | 上海电气富士电机电气技术有限公司 | A kind of three level power unit main circuits and cascade high voltage RHVC |
| CN109625228A (en) * | 2018-10-09 | 2019-04-16 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） | A kind of permanent magnetism propulsion system topology |
| DE102021114207A1 (en) | 2021-06-01 | 2022-12-01 | Convertertec Deutschland Gmbh | Circuit arrangement for providing electrical power for large DC loads |
| WO2022253704A1 (en) | 2021-06-01 | 2022-12-08 | Convertertec Deutschland Gmbh | Circuit assembly and method for providing electric power for large dc loads |
| DE102021114207A9 (en) | 2021-06-01 | 2023-01-19 | Convertertec Deutschland Gmbh | Circuit arrangement for providing electrical power for large DC loads |
| DE102021114207B4 (en) | 2021-06-01 | 2023-04-27 | Convertertec Deutschland Gmbh | Circuit arrangement and method for providing electrical power for large DC loads |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201323531Y (en) | 6KV high-voltage transducer directly composed of three-level H-bridge power unit module | |
| CN101707443B (en) | Novel electric power electric transformer | |
| CN203608108U (en) | Capacitance voltage self-balancing circuit of modular multilevel converter | |
| CN103715930B (en) | A kind of method promoting flexible direct current power transmission system capacity | |
| CN102832841A (en) | Modularized multi-level converter with auxiliary diode | |
| CN105071679B (en) | The five level self-balancing inverters based on bridge switch capacitance module | |
| CN105356731A (en) | Submodule triggering methods for high-voltage direct-current transmission system of modular multilevel converter | |
| CN103138675A (en) | High-voltage inverter sharing direct current (DC) bus | |
| CN102195289A (en) | Cascade-structure-based hybrid active power filter | |
| CN102593859A (en) | Three-phase UPQC (Unified Power Quality Controller) topology circuit based on MMC (Multi Media Card) | |
| CN103633872A (en) | Capacitor voltage self-balancing circuit of modularized multi-level converter | |
| CN101574935B (en) | Module combined power quality conditioning system for tractive power supply network | |
| CN103427652A (en) | High-voltage high-power DC-DC conversion device | |
| CN103427653A (en) | High-voltage DC-DC conversion device | |
| CN103427658A (en) | High-voltage DC-DC conversion device based on multi-winding transformer | |
| CN103762879B (en) | Single-phase three switches set MMC inverter and the control methods thereof of dual output without direct current biasing | |
| CN102820666B (en) | Three-phase power electronic transformer capable of balancing asymmetric load | |
| CN103441676A (en) | Modularized device for conversion between high-voltage direct current and direct current | |
| CN203104360U (en) | A high-voltage frequency converter with a common DC bus | |
| CN209627231U (en) | A kind of high-voltage frequency converter braking circuit topological structure | |
| CN102412571B (en) | Bus short circuit current limiter for parallel compensation power grid | |
| CN102437575B (en) | Medium-and-high-voltage unified power quality controller (UPQC) without transformer | |
| CN202084941U (en) | Three-phase two-arm three-level active power quality compensator suitable for middle-and-high voltage system | |
| CN102983586A (en) | High voltage direct current transmission (HVDC) and unified power flow controller (UPFC) system based on three-level inverter voltage source current converter | |
| CN102983753A (en) | High-voltage inverter with UPS (uninterrupted power supply) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091007 |