CN217282723U - ACD five-level frequency converter with online backup phase module - Google Patents
ACD five-level frequency converter with online backup phase module Download PDFInfo
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- CN217282723U CN217282723U CN202220708263.8U CN202220708263U CN217282723U CN 217282723 U CN217282723 U CN 217282723U CN 202220708263 U CN202220708263 U CN 202220708263U CN 217282723 U CN217282723 U CN 217282723U
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Abstract
The utility model belongs to well high-voltage inverter control technique provides an ACD five-level converter with online backup phase module, carries out modular design, encapsulation and interface as the basic power unit according to the phase module to be equipped with one and more than online backup phase module, by three the rectifier bridge is constituteed to the phase module, and is three in case the inverter bridge is constituteed to phase module in rectifier bridge or the inverter bridge the phase module breaks down, under the state that has a power failure, replaces with the phase module of backup. And the fault phase module is maintained off line, and after the fault phase module is repaired to be qualified, the fault phase module is used as a backup phase module to restore the on-line operation, and the fault phase module is repeatedly and cyclically used. The ACD five-level frequency converter shortens the repair time of the ACD five-level frequency converter due to the fault, improves the production efficiency, reduces the risk and potential safety hazard caused by the fault, and has certain social and economic benefits.
Description
Technical Field
The utility model belongs to well high-voltage inverter control technique provides an ACD five-level frequency converter with online backup looks module, ACD is AC Drivers (exchange drive or exchange many transmission) for short. The medium-high voltage generally refers to a voltage class of 3.3kV, 6kV and the like.
Background
Some mechanical equipment, such as mine hoists, blast furnace burden hoists, large and medium belt conveyors, large and medium mine ventilators, etc., require no stoppages in the middle or possibly short stoppages. In the traditional five-level frequency converter, a power device IGBT is assembled on one or two radiators to form a three-phase rectifier bridge and a three-phase inverter bridge. Due to overvoltage, overcurrent and other reasons, the power device IGBT and the like are weak, and the probability of failure or damage is high. If the frequency converter fails in the using process, a fault point is searched and determined, the frequency converter is repaired by replacing a damaged component and is put into use again, so that the shutdown time is long or uncertain due to the fact, and the production efficiency and the personal safety are influenced; if the damaged component is short of spare parts, or the spare parts are stored off line due to poor storage or environmental factors, the characteristic of the spare parts is reduced, and the downtime is longer. For example, a mine hoist for transporting personnel is stopped in the midway due to reasons, passengers in a hoisting container are trapped in the middle of a shaft, the passengers are detained for a long time, the emotion agitation of the passengers can be caused, and the potential safety hazard is increased along with the stopping time; as another example, a mine ventilation system with high gas may cause gas bursts if it is shut down for a long period of time, which may directly threaten the life safety of personnel in the area.
The modular design and packaging of phase medium power devices are also performed by individual traditional five-level frequency converters, but the modules are off-line backup, the performance of the backup modules cannot be guaranteed due to the limitation of conditions such as storage and test, the condition that the backup modules are not good is often found when the conditions occur, and the repair time of the frequency converters is delayed.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defect that the repair time of the traditional five-level frequency converter is uncertain due to reasons, the utility model provides an ACD five-level frequency converter with an online backup phase module.
The utility model discloses take following technical scheme to accomplish its practical novel purpose:
an ACD five-level frequency converter with an online backup phase module is provided with a plurality of phase modules which are used as basic power units to carry out modular design, packaging and interface; the phase module consists of a phase main loop and a phase trigger and is used as a basic power unit which can be replaced mutually; the phase main loop is composed of an upper bridge arm, a lower bridge arm and an IGBT (insulated gate bipolar transistor) for realizing active clamping, wherein the upper bridge arm and the lower bridge arm are packaged in a movably-disassembled drawer or assembly together with the phase trigger; wherein the upper bridge arm is composed of IGBT 11 、IGBT 12 、IGBT 21 、IGBT 22 Are connected in series; the lower bridge arm is composed of IGBT 31 、IGBT 32 、IGBT 41 、IGBT 42 Are connected in series; IGBT with active clamp 51 、IGBT 52 And IGBT 61 、IGBT 62 Forming; the upper bridge arm, the lower bridge arm and the IGBT for realizing active clamping are fastened on a radiator; in the phase main loop, IGBT 11 、IGBT 12 、IGBT 21 、IGBT 22 、IGBT 31 、IGBT 32 、IGBT 41 、IGBT 42 Are connected in series in turn according to an emitting electrode and a collecting electrode, and the IGBT 51 、IGBT 52 、IGBT 61 、IGBT 62 Are also connected in series in sequence according to the emitting electrode and the collecting electrode, and the IGBT 51 Collector and upper bridge arm of IGBT 12 Emitter electrode of (1), IGBT 21 Are connected together, IGBT 62 Emitter of (2) and IGBT of lower bridge arm 32 Emitter electrode of (2), IGBT 41 Are connected together to form a typical active neutral point clamped five level circuit; the phase main loop forms four power terminals: "+ E, -E, 0", are: the upper bridge arm IGBT 11 The collector outlet terminal is + E', IGBT 22 And the lower bridge arm IGBT 31 The collector of the lower bridge arm IGBT is connected with a leading-out terminal of "-", and the lower bridge arm IGBT is connected with a leading-out terminal of "-" 42 The emitting electrode outlet terminal is 'E' and is used for the active clamping IGBT 52 Emitter and IGBT 61 The outlet terminal is 0 after the collectors are connected in series. Trigger signal line branch of the phase triggerGate electrodes connected to the IGBT are: four IGBTs of an upper bridge arm, four IGBTs of a lower bridge arm and four IGBTs for realizing active clamping provide trigger signals for the IGBTs; one end of phase capacitor Cf and upper bridge arm IGBT 21 Emitter electrode of (1), IGBT 22 Is connected with the collector electrode of the lower bridge arm IGBT at the other end 31 Emitter electrode of (1), IGBT 32 Is connected to the collector of the collector.
The three phase modules form a rectifier bridge; the three phase modules form an inverter bridge, and at least one phase module used for replacing a rectifier bridge or the inverter bridge is arranged as an online backup phase module; once a phase module of the rectifier bridge or the inverter bridge has a fault, the backup phase module is used for replacing the fault phase module, and the ACD five-level frequency converter can recover to operate in the shortest time. And (4) withdrawing the failed phase module, maintaining the failed phase module off line, and taking the failed phase module as a backup phase module to restore online standby operation in time after the failed phase module is repaired to be qualified for recycling.
The rectifier bridge consists of three phase modules and a rectifier bridge controller, and the minus terminals of the three phase main circuits are respectively connected with three input terminals on the network side through busbars or power cables to form three input ends of the ACD five-level frequency converter; and connecting the optical fiber ports of the three corresponding phase triggers with the optical fiber port of the rectifier bridge controller through optical fibers, wherein the phase triggers receive control signals from the rectifier bridge controller and transmit the operating parameters of the rectifier bridge, including fault information, to the rectifier bridge controller, so that the safe operation of the rectifier bridge is ensured.
Similarly, the inverter bridge consists of three phase modules and an inverter bridge controller, and the terminals of the three phase main circuits are respectively connected with three output terminals on the motor side through busbars or power cables to form three output ends of the ACD five-level frequency converter; and connecting the optical fiber ports of the three corresponding phase triggers with the optical fiber port of the inverter bridge controller through optical fibers, wherein the phase triggers receive control signals from the inverter bridge controller and transmit the operating parameters of the inverter bridge, including fault information, to the rectifier bridge controller, so that the safe operation of the rectifier bridge is ensured.
The number of the online backup phase modules is at least one, the + E ',' -E 'and' 0 'are three poles of a laminated busbar, and the rectifier bridge and the inverter bridge are connected together with the + E', '-E' and '0' three poles of the online backup phase modules through the laminated busbar to form + E, -E and 0 three poles of the direct current busbar of the ACD five-level frequency converter with the online backup phase modules, so that the backup phase modules can be in an online standby state.
The online backup phase main loop terminals "-", "0" and the optical fiber ports of the phase trigger are all in idle states, and the online backup phase module is ensured to be in an online standby state in the operation process of the ACD five-level frequency converter with the online backup phase module, so that the capability of replacing a fault phase module at any time is realized.
Once the phase module in the rectifier bridge or the inverter bridge has a fault, replacing the fault phase module with the backup phase module in a power failure state, and removing and maintaining the fault phase module off line; and after the failed phase module is repaired to be qualified, the failed phase module is used as a backup phase module, the online operation is recovered, and the module is repeatedly and circularly used, so that the ACD five-level frequency converter is ensured to be in a good state and is often provided with the online backup phase module.
The four power terminals "+ E, 0" of the phase main loop are quick plug-in terminals or quick dismounting fasteners, so that the phase module is convenient and quick to dismount.
The radiator is an air cooling radiator and a water cooling plate.
The utility model provides a five level converters of ACD with online backup looks module carries out modular design, encapsulation and interface as basic power unit according to the looks module, online backup at least one looks module. And once the phase module in the rectifier bridge or the inverter bridge fails, the phase module is replaced by a backup phase module in the power failure state. And the fault phase module is maintained off line, and after the fault phase module is repaired to be qualified, the fault phase module is used as a backup phase module to restore the on-line operation, and the fault phase module is repeatedly and cyclically used. The ACD five-level frequency converter shortens the repair time of the ACD five-level frequency converter due to the fault, improves the production efficiency, reduces the risk and potential safety hazard caused by the fault, and has certain social and economic benefits.
Drawings
Fig. 1 is a schematic diagram of an ACD five-level frequency converter with an online backup phase module;
fig. 2 is a schematic diagram of an active neutral point clamp ACD five-level phase module.
In the figure: 1. the system comprises a phase module main loop, 2, a phase trigger, 3, a rectifier bridge controller, 4, an inverter bridge controller, 5, a rectifier bridge, 6, an inverter bridge, 7 and an online backup phase module.
Detailed Description
The embodiment of the present invention is described with reference to the accompanying drawings:
in the figure, the utility model provides a five level converters of ACD with online backup looks module carries out modular design, encapsulation and interface as basic power unit according to the looks module, constitutes the rectifier bridge by three looks module, constitutes the inverter bridge by other three looks module, is equipped with one and more than one looks module simultaneously and regards as online backup. Once a phase module of the rectifier bridge or the inverter bridge has a fault, the backup phase module replaces the fault phase module, the ACD five-level frequency converter can recover to operate in the shortest time, the fault phase module is quitted and maintained off-line, and the fault phase module is used as the backup phase module to recover to operate on-line standby in time after being repaired to be qualified, and is recycled.
The phase module consists of a phase main loop 1 and a phase trigger 2, and is used as a mutually replaceable basic power unit; the phase main loop 1 mainly comprises four IGBTs (IGBTs) connected in series by an upper bridge arm 11 、IGBT 12 And IGBT 21 、IGBT 22 ) Four IGBTs (IGBT) connected in series with lower bridge arm 31 、IGBT 32 And IGBT 41 、IGBT 42 ) And four IGBTs (IGBTs) implementing active clamping 51 、IGBT 52 And IGBT 61 、IGBT 62 ) Assembled and fastened to a radiator, with said phase trigger 2Packaged together in a movable and detachable drawer or component; eight IGBTs (IGBTs) in the phase main loop 1 11 、IGBT 12 And IGBT 21 、IGBT 22 And IGBT 31 、IGBT 32 And IGBT 41 、IGBT 42 ) Four clamping IGBTs (IGBTs) are connected in series according to the emitting electrode-collecting electrode in sequence 51 、IGBT 52 And IGBT 61 、IGBT 62 ) Are also connected in series in sequence according to an emitting electrode and a collecting electrode, and the IGBT 51 Collector and upper bridge arm of IGBT 12 Emitter electrode of (1), IGBT 21 Are connected together, IGBT 62 Emitter of (2) and IGBT of lower bridge arm 32 Emitter electrode of (1), IGBT 41 Are connected together to form a typical active neutral point clamped five level circuit; the phase main loop 1 forms four power terminals: "+ E, -E, 0", are: the upper bridge arm IGBT 11 The collector outlet terminal is + E', IGBT 22 And the lower bridge arm IGBT 31 The collector of the lower bridge arm IGBT is connected with a leading-out terminal of "-", and the lower bridge arm IGBT is connected with a leading-out terminal of "-" 42 The emitting electrode outlet terminal is 'E' and is used for the active clamping IGBT 52 Emitter and IGBT 61 The outlet terminal is 0 after the collectors are connected in series. The trigger signal lines of the phase trigger 2 are respectively connected to the gates of the IGBTs, and they are: upper bridge arm four IGBTs (IGBT) 11 、IGBT 12 And IGBT 21 、IGBT 22 ) And four IGBTs (IGBT) of lower bridge arm 31 、IGBT 32 And IGBT 41 、IGBT 42 ) And realizing four active clamping IGBTs (IGBTs) 51 、IGBT 52 And IGBT 61 、IGBT 62 ) And providing a trigger signal for the IGBT. Phase capacitance C f And upper bridge arm IGBT 21 Emitter electrode of (1), IGBT 22 Is connected with the collector electrode of the lower bridge arm IGBT at the other end 31 Emitter electrode of (1), IGBT 32 Is connected to the collector of the collector.
The rectifier bridge 5 consists of three phase modules and a rectifier bridge controller 3, and the "-" terminals of the three phase main circuits 1 are respectively connected with three input terminals on the network side through busbars or power cables to form three input ends R, S, T of the ACD five-level frequency converter; and connecting the optical fiber ports of the three corresponding phase triggers with the optical fiber ports r, s and t of the rectifier bridge controller 3 through optical fibers, wherein the phase triggers 2 receive control signals from the rectifier bridge controller 3 and transmit the operation parameters of the rectifier bridge 5 including fault information to the rectifier bridge controller 3, so that the safe operation of the rectifier bridge 5 is ensured.
Similarly, the inverter bridge 6 is composed of three phase modules and an inverter bridge controller 4, and the "-" terminals of the three phase main circuits 1 are respectively connected with three output terminals at the motor side through busbars or power cables to form three output ends U, V, W of the ACD five-level frequency converter; and connecting the corresponding optical fiber ports of the three phase triggers 2 with the optical fiber ports u, v and w of the inverter bridge controller 4 through optical fibers, wherein the phase triggers 2 receive control signals from the inverter bridge controller 4 and transmit the operation parameters of the inverter bridge 6 including fault information to the rectifier bridge controller 4, so that the safe operation of the rectifier bridge 6 is ensured.
The number of the online backup phase modules 7 is at least one, the + E "," -E "and" 0 "are three poles of a laminated busbar, and the rectifier bridge 5 and the inverter bridge 6 and the + E", "-E" and "0" three poles of the online backup phase module 7 are connected together by the laminated busbar to form + E, -E and 0 three poles of the dc busbar of the ACD five-level frequency converter with the online backup phase module, so that the backup phase module 7 can be in an online standby state.
The terminals "-" of the main loop 1 of the online backup phase and the optical fiber ports of the phase trigger 2 are all in idle states, and the ACD five-level frequency converter with the online backup phase module ensures that the online backup phase module 7 is in an online standby state in the running process, and has the capability of replacing a fault phase module at any time.
Once the phase module in the rectifier bridge 5 or the inverter bridge 6 has a fault, the online backup phase module 7 is used for replacing the fault phase module in a power failure state, and the fault phase module is removed and maintained offline; and after the failed phase module is repaired to be qualified, the failed phase module is used as a backup phase module, the online operation is recovered, and the module is repeatedly and circularly used, so that the ACD five-level frequency converter is ensured to be in a good state and is often provided with the online backup phase module 7.
The four power terminals "+ E" -, -E, 0 "of the phase main loop 1 are quick plug terminals or quick disassembly and assembly fasteners, so that the phase module is ensured to be convenient and quick to disassemble and assemble.
The radiator is an air cooling radiator and a water cooling plate.
The above only be the utility model discloses a preferred embodiment, the utility model discloses a protection scope is not limited to here, and is any based on the utility model discloses equivalent transform on the technical scheme all belongs to within the protection scope.
Claims (4)
1. An ACD five-level frequency converter with an online backup phase module is characterized in that: the ACD five-level frequency converter is provided with a plurality of phase modules which are used as basic power units to carry out modular design, packaging and interface; the phase module consists of a phase main loop and a phase trigger and is used as a basic power unit which can be replaced mutually; the phase main loop is composed of an upper bridge arm, a lower bridge arm and an IGBT (insulated gate bipolar translator) for realizing active clamping, wherein the upper bridge arm and the lower bridge arm are packaged in a movably-dismounted drawer or assembly together with the phase trigger; wherein the upper bridge arm is composed of IGBT 11 、IGBT 12 、IGBT 21 、IGBT 22 Are connected in series; the lower bridge arm is composed of IGBT 31 、IGBT 32 、IGBT 41 、IGBT 42 Are connected in series; IGBT with active clamp 51 、IGBT 52 And IGBT 61 、IGBT 62 Composition is carried out; the upper bridge arm, the lower bridge arm and the IGBT for realizing active clamping are fastened on a radiator; in the phase main loop, IGBT 11 、IGBT 12 、IGBT 21 、IGBT 22 、IGBT 31 、IGBT 32 、IGBT 41 、IGBT 42 Are connected in series in turn according to an emitting electrode and a collecting electrode, and the IGBT 51 、IGBT 52 、IGBT 61 、IGBT 62 Are also connected in series in sequence according to an emitting electrode and a collecting electrode, and the IGBT 51 Collector and upper bridge arm of IGBT 12 Emitter electrode of (1), IGBT 21 Are connected together, IGBT 62 And IGBT of lower bridge arm 32 Emitter electrode of (1), IGBT 41 Are connected together to form a typical active neutral point clamped five level circuit; the phase main loop forms four power terminals: "+ E, -E, 0", are: the upper bridge arm IGBT 11 The collector outlet terminal is + E', IGBT 22 And the lower bridge arm IGBT 31 The collector of the lower bridge arm IGBT is connected with a leading-out terminal of "-", and the lower bridge arm IGBT is connected with a leading-out terminal of "-" 42 The emitting electrode outlet terminal is 'E' and is used for the active clamping IGBT 52 Emitter and IGBT 61 The outlet terminal is '0' after the collectors are connected in series; the trigger signal lines of the phase trigger are respectively connected to the gates of the IGBTs, and the phase trigger comprises: four IGBTs of an upper bridge arm, four IGBTs of a lower bridge arm and four IGBTs for realizing active clamping provide trigger signals for the IGBTs; one end of phase capacitor Cf and upper bridge arm IGBT 21 Emitter electrode of (1), IGBT 22 Is connected with the collector electrode of the lower bridge arm IGBT at the other end 31 Emitter electrode of (2), IGBT 32 The collector electrodes are connected;
the three phase modules form a rectifier bridge; the three phase modules form an inverter bridge, and at least one phase module used for replacing a rectifier bridge or the inverter bridge is arranged as an online backup phase module.
2. The ACD five-level frequency converter with an online backup phase module according to claim 1, wherein: at least one online backup phase module is provided; connecting three poles of + E, E and 0 of the rectifier bridge, the inverter bridge and the online backup phase module together through a laminated busbar to form three poles of + E, E and 0 of a direct current busbar of the ACD five-level frequency converter with the online backup phase module; and the terminal "-" of the online backup phase module and the optical fiber port of the phase trigger are both in idle states, and the backup phase module is always in an online standby state.
3. The ACD five-level frequency converter with an online backup phase module according to claim 1 or 2, wherein: the four power terminals "+ E, 0" of the phase main loop are quick plug-in terminals or quick dismounting fasteners.
4. The ACD five-level frequency converter with the online backup phase module as claimed in claim 1 or 2, wherein: the radiator is an air cooling radiator and a water cooling plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220708263.8U CN217282723U (en) | 2022-03-30 | 2022-03-30 | ACD five-level frequency converter with online backup phase module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220708263.8U CN217282723U (en) | 2022-03-30 | 2022-03-30 | ACD five-level frequency converter with online backup phase module |
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| CN217282723U true CN217282723U (en) | 2022-08-23 |
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| CN202220708263.8U Active CN217282723U (en) | 2022-03-30 | 2022-03-30 | ACD five-level frequency converter with online backup phase module |
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| CN (1) | CN217282723U (en) |
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- 2022-03-30 CN CN202220708263.8U patent/CN217282723U/en active Active
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