CN218678884U - High-efficient doublestage compressor frequency conversion actuating system - Google Patents
High-efficient doublestage compressor frequency conversion actuating system Download PDFInfo
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- CN218678884U CN218678884U CN202320257866.5U CN202320257866U CN218678884U CN 218678884 U CN218678884 U CN 218678884U CN 202320257866 U CN202320257866 U CN 202320257866U CN 218678884 U CN218678884 U CN 218678884U
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Abstract
The utility model discloses a high-efficiency two-stage compressor variable frequency driving system, which is a two-stage compressor variable frequency driving double-set system and a two-stage compressor variable frequency driving single-set system; the system comprises a power grid, a user side circuit breaker, an isolation system, a 12-pulse rectifier transformer, a low-voltage incoming switch, a rectifier module, a direct-current bus DC1, a direct-current bus DC2, an inverter module and a motor; the power grid is connected with the isolation system through a user side breaker; the isolation system is connected with the 12-pulse rectifier transformer; the 12 pulse rectifier transformer is connected with the rectifier module through a low-voltage incoming switch; the rectification module is connected with the direct current bus DC1 and the direct current bus DC 2; the direct current bus DC1 and the direct current bus DC2 are connected with the inversion module; the inversion module is connected with the motor. The utility model discloses a 12 pulse rectification modes effectively reduce the influence of input current harmonic to the electric wire netting, and power density is high, overhauls safety, and system redundancy design effectively improve equipment's reliability.
Description
Technical Field
The utility model relates to a power electronic technology field, concretely relates to high-efficient doublestage compressor variable frequency drive system.
Background
An air compressor, called air compressor for short, is a device for compressing air. An air compressor is a core device of a pneumatic system, is a device for converting mechanical energy of a prime mover (usually an electric motor or a diesel engine) into gas pressure energy, is an air pressure generating device for compressing air, and is widely applied to various industries such as industry, production industry, food, pharmacy, coal mining and the like. For a two-stage compressor system, two-stage compression is generally performed on air, and taking a typical compressor system of 100 cubic meters as an example, the system needs two motors to drive a compressor head, so that the air compression is realized. At present, with the deepening of the national 'double-carbon' economy, the energy-saving requirement in the industrial field is higher and higher in the future, and therefore, the high-efficiency double-stage compressor has a wide market. The current two-stage compressor has the problems of high current harmonic content and serious influence on the quality of a power grid in a high-power occasion; when the gas consumption is increased, a single set of compressor system is not enough, and the economic benefit of an enterprise is seriously damaged once a fault occurs.
SUMMERY OF THE UTILITY MODEL
For solving above problem, the utility model provides a high-efficient doublestage compressor frequency conversion actuating system adopts 12 pulse rectification modes, effectively reduces the influence of input current harmonic to the electric wire netting, and two sets of compressor actuating system independent operation can parallel operation also can the independent operation, and the system redundancy design effectively improve equipment's reliability.
In order to achieve the purpose, the utility model adopts the following scheme:
a high-efficiency two-stage compressor variable frequency driving system comprises a two-stage compressor variable frequency driving double-set system and a two-stage compressor variable frequency driving single-set system;
wherein, the double system of double stage compressor frequency conversion drive includes: network voltageV in User ofThe system comprises a side circuit breaker QF1, an isolation system, a 12-pulse rectifier transformer T, low-voltage incoming line switches QF11, QF12, QF13 and QF14, a rectifier module, a direct-current bus DC1, a direct-current bus DC2, an inverter module and motors M1, M2, M3 and M4; the isolation system comprises an isolation switch QS1 and a high-voltage vacuum contactor KM1; the rectification module comprises a rectification unit A1, a rectification unit A2, a rectification unit A3 and a rectification unit A4, and the inversion module comprises an inversion unit B1, an inversion unit B2, an inversion unit B3 and an inversion unit B4; network voltageV in The system is connected with a user side circuit breaker QF1, the user side circuit breaker QF1 is connected with an isolating switch QS1, the isolating switch QS1 is connected with a high-voltage vacuum contactor KM1, the high-voltage vacuum contactor KM1 is connected with a 12-pulse rectifier transformer T, the 12-pulse rectifier transformer T is connected with low-voltage incoming line switches QF11, QF12, QF13 and QF14, the low-voltage incoming line switches QF11, QF12, QF13 and QF14 are respectively connected with a rectifying unit A1, a rectifying unit A2, a rectifying unit A3 and a rectifying unit A4, the rectifying unit A1 and the rectifying unit A3 are connected with a direct current bus DC1, the rectifying unit A2 and the rectifying unit A4 are connected with a direct current bus DC2, the direct current bus DC1 is connected with an inverter unit B1 and an inverter unit B2, the direct current bus DC2 is connected with an inverter unit B3 and an inverter unit B4, and the inverter unit B1, M2, M3 and M4 are respectively connected with motors.
Wherein, the single set of system of double stage compressor frequency conversion drive includes: network voltageV in A user side circuit breaker QF1, an isolating switch QS1, high-voltage vacuum contactors KM1 and KM 12 pulse rectifier transformers T, low-voltage incoming line switches QF11 and QF13, a rectifying unit A1, a rectifying unit A3, a direct-current bus DC1, an inverting unit B2 and motors M1 and M2; network voltageV in The system is connected with a user side breaker QF1, the user side breaker QF1 is connected with an isolating switch QS1, the isolating switch QS1 is connected with a high-voltage vacuum contactor KM1, the high-voltage vacuum contactor KM1 is connected with a 12-pulse rectifier transformer T, the 12-pulse rectifier transformer T is connected with low-voltage incoming switches QF11 and QF13, the low-voltage incoming switches QF11 and QF13 are connected with a rectifying unit A1 and a rectifying unit A3, the rectifying unit A1 and the rectifying unit A3 are connected with a direct current bus DC1, the direct current bus DC1 is connected with an inversion unit B1 and an inversion unit B2, and the inversion unit is connected with a power supply unit B1 and an inverter unit B2B1 and the inversion unit B2 are respectively connected with the motors M1 and M2.
Furthermore, a 12-pulse rectifier transformer T adopts a delta/delta connection method and a delta/Y connection method, and the delta/delta connection method is connected with low-voltage incoming line switches QF11 and QF 12; the delta/Y connection method is connected with low-voltage incoming line switches QF13 and QF 14; and the 12 pulse rectifier transformer T adopts an indirect water cooling mode, namely hot air of the 12 pulse rectifier transformer T carries out indirect heat exchange with water through the air-water cooling heat exchanger.
Further, a frequency converter high-voltage breaking is arranged at the equipment end of the user side circuit breaker QF1 and the isolation system.
Furthermore, the rectifying unit and the inverting unit are in modular design, and the sizes are universal and interchangeable; and a water cooling heat dissipation mode is adopted, so that the cooling efficiency is high, and the maintenance workload is less.
The utility model has the advantages that:
1. the 12-pulse rectification mode is adopted, so that the influence of input current harmonic waves on a power grid can be effectively reduced;
2. the user side circuit breaker QF1 and the isolation system perform high-voltage breaking of the frequency converter at the equipment end, and an obvious breakpoint is formed during maintenance to ensure the maintenance safety;
3. the two sets of compressor driving systems operate independently, can operate in parallel or independently, are designed in a system redundancy mode, and effectively improve the reliability of equipment.
Drawings
The invention will be described in further detail with reference to the following drawings and detailed description:
fig. 1 is a double-stage compressor variable-frequency driving system provided by the present invention;
fig. 2 is the utility model provides a double stage compressor variable frequency drive single system.
Detailed description of the preferred embodiments
The following description is merely a preferred embodiment of the present invention. The present invention will be described in further detail with reference to the drawings and the detailed description, so that those skilled in the art can understand the present invention, it should be noted that all the inventions utilizing the concepts of the present invention are protected without departing from the spirit and scope of the present invention as long as various changes are defined and determined by the appended claims.
Fig. 1 is the utility model provides a double-stage compressor variable frequency drive system. As shown in fig. 1, including the grid voltageV in The system comprises a user-side circuit breaker QF1, an isolation system, a 12-pulse rectifier transformer T, low-voltage incoming switches QF11, QF12, QF13 and QF14, a rectifier module, a direct-current bus DC1, a direct-current bus DC2, an inverter module and motors M1, M2, M3 and M4; the isolation system comprises an isolation switch QS1 and a high-voltage vacuum contactor KM1; the rectifying module comprises a rectifying unit A1, a rectifying unit A2, a rectifying unit A3 and a rectifying unit A4; the inversion module comprises an inversion unit B1, an inversion unit B2, an inversion unit B3 and an inversion unit B4; network voltageV in The user side breaker QF1 is connected with the power supply; a user side breaker QF1 is connected with a disconnecting switch QS 1; an isolating switch QS1 is connected with a high-voltage vacuum contactor KM1; the high-voltage vacuum contactor KM1 is connected with a 12-pulse rectifier transformer T; the 12-pulse rectifier transformer T is connected with low-voltage incoming line switches QF11, QF12, QF13 and QF 14; the low-voltage incoming line switches QF11, QF12, QF13 and QF14 are respectively connected with the rectifying unit A1, the rectifying unit A2, the rectifying unit A3 and the rectifying unit A4; the rectifying unit A1 and the rectifying unit A3 are connected with the direct current bus DC 1; the rectifying unit A2 and the rectifying unit A4 are connected with the direct current bus DC 2; the direct current bus DC1 is connected with the inversion unit B1 and the inversion unit B2; the direct current bus DC2 is connected with the inversion unit B3 and the inversion unit B4; the inversion unit B1, the inversion unit B2, the inversion unit B3 and the inversion unit B4 are respectively connected with the motors M1, M2, M3 and M4.
The system is high-voltage input, the main application scene of the system is energy-saving transformation projects, and the variable-frequency driving system and the load are arranged in the same area, so that a user-side circuit breaker QF1 and an isolation system are additionally arranged at the front end of the rectifier transformer, and high-voltage breaking of the frequency converter can be carried out at the equipment end. When in maintenance, an obvious breakpoint is formed, and the maintenance safety is ensured.
The 12-pulse rectifier transformer T adopts a delta/delta connection method and a delta/Y connection method, and the delta/delta connection method is connected with the low-voltage incoming line switches QF11 and QF 12; the delta/Y connection method is connected with the low-voltage inlet wire switches QF13 and QF14, and the 12-pulse rectifier transformer T adopts an indirect water cooling mode, namely, hot air of the 12-pulse rectifier transformer T indirectly exchanges heat with water through the air-water cooling heat exchanger.
The rectification module comprises 4 rectification units, and the inversion module comprises 4 inversion units; the rectification unit and the inversion unit are in modular design, have universal sizes and can be interchanged, and a frequency conversion system is added according to different applications, so that the expansion requirement of the frequency conversion system can be met; and a water-cooling heat dissipation mode is adopted, so that the cooling efficiency is high, and the maintenance workload is less; the bottom of the modularized rectifying unit and the bottom of the inversion unit are also provided with rollers, so that the disassembly and maintenance are convenient.
For each set of compressor system, the two inverter units adopt a mode of sharing a direct current bus, and the heat dissipation of the motor system is considered to be water-cooling heat dissipation, so that the integral mode of the frequency converter driving system is also water-cooling heat dissipation, the 12-pulse rectifier transformer adopts a high-efficiency transformer, and the heat dissipation mode adopts an indirect water-cooling mode, namely, the hot air of the rectifier transformer carries out indirect heat exchange through an air-water cooling heat exchanger; the rectification unit and the inversion unit adopt water cooling plates for direct heat dissipation.
The double-stage compressor variable-frequency driving system is applied to the condition that when the gas consumption is increased, a single-stage compressor system is not enough, the redundancy design of the system can be made, the double-stage compressor variable-frequency driving system can be replaced in time when a fault occurs, and the production benefit of an enterprise is not influenced.
Fig. 2 is the utility model provides a single set of system of double stage compressor frequency conversion drive, as shown in fig. 2, only launch a part module of double stage compressor frequency conversion drive double system and constitute single set of system: network voltageV in The system comprises a user side circuit breaker QF1, an isolation system, a 12-pulse rectifier transformer T, low-voltage incoming line switches QF11 and QF13, a rectification unit A1, a rectification unit A3, a direct-current bus DC1, an inversion unit B2 and motors M1 and M2. Network voltageV in The user side breaker QF1 is connected with the power supply; a user side breaker QF1 is connected with a disconnecting switch QS 1; an isolating switch QS1 is connected with a high-voltage vacuum contactor KM1; the high-voltage vacuum contactor KM1 is connected with a 12-pulse rectifier transformer T; 12 pulse rectifier transformer T and low-voltage incoming line switches QF11 and QF13 are connected; the low-voltage incoming line switches QF11 and QF13 are connected with the rectifying unit A1 and the rectifying unit A3; the rectifying unit A1 and the rectifying unit A3 are connected with the direct current bus DC 1; the direct current bus DC1 is connected with the inversion unit B1 and the inversion unit B2; the inversion unit B1 and the inversion unit B2 are respectively connected with the motors M1 and M2; forming a complete double-stage compressor variable-frequency driving single-set system.
When the variable-frequency driving single-set system of the double-stage compressor is applied to less air consumption, the workload can be completed only by the single-set system, and the energy consumption and the use of equipment are effectively saved.
While the present invention has been described in detail with reference to the embodiments, the scope of the present invention should not be limited to the embodiments. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.
Claims (3)
1. A high efficiency two stage compressor variable frequency drive system comprising: the double-stage compressor variable frequency driving double-set system and the double-stage compressor variable frequency driving single-set system;
the double-stage compressor variable-frequency driving system comprises: network voltageV in The system comprises a user-side circuit breaker QF1, an isolation system, a 12-pulse rectifier transformer T, low-voltage incoming switches QF11, QF12, QF13 and QF14, a rectifier module, a direct-current bus DC1, a direct-current bus DC2, an inverter module and motors M1, M2, M3 and M4; the isolation system comprises an isolation switch QS1 and a high-voltage vacuum contactor KM1; the rectification module comprises a rectification unit A1, a rectification unit A2, a rectification unit A3 and a rectification unit A4, and the inversion module comprises an inversion unit B1, an inversion unit B2, an inversion unit B3 and an inversion unit B4; characterised by the network voltageV in The system is connected with a user side breaker QF1, the user side breaker QF1 is connected with an isolating switch QS1, the isolating switch QS1 is connected with a high-voltage vacuum contactor KM1, the high-voltage vacuum contactor KM1 is connected with a 12-pulse rectifier transformer T, the 12-pulse rectifier transformer T is connected with low-voltage incoming switches QF11, QF12, QF13 and QF14, the low-voltage incoming switches QF11, QF12, QF13 and QF14 are respectively connected with a rectifying unit A1, a rectifying unit A2, a rectifying unit A3, a transformer unit B1, a transformer B12, a transformer B14, a rectifier unit B12, a rectifier unit B13 and a rectifier unit B14,The rectification unit A4 is connected, the rectification unit A1 and the rectification unit A3 are connected with the direct current bus DC1, the rectification unit A2 and the rectification unit A4 are connected with the direct current bus DC2, the direct current bus DC1 is connected with the inversion unit B1 and the inversion unit B2, the direct current bus DC2 is connected with the inversion unit B3 and the inversion unit B4, and the inversion unit B1, the inversion unit B2, the inversion unit B3 and the inversion unit B4 are respectively connected with the motors M1, M2, M3 and M4;
the single system of double stage compressor frequency conversion drive includes: network voltageV in A user side circuit breaker QF1, an isolating switch QS1, high-voltage vacuum contactors KM1 and KM 12 pulse rectifier transformers T, low-voltage incoming line switches QF11 and QF13, a rectifying unit A1, a rectifying unit A3, a direct-current bus DC1, an inverting unit B2 and motors M1 and M2; characterised by the network voltageV in The system is connected with a user side breaker QF1, the user side breaker QF1 is connected with an isolating switch QS1, the isolating switch QS1 is connected with a high-voltage vacuum contactor KM1, the high-voltage vacuum contactor KM1 is connected with a 12-pulse rectifier transformer T, the 12-pulse rectifier transformer T is connected with low-voltage incoming line switches QF11 and QF13, the low-voltage incoming line switches QF11 and QF13 are connected with a rectifier unit A1 and a rectifier unit A3, the rectifier unit A1 and the rectifier unit A3 are connected with a direct current bus DC1, the direct current bus DC1 is connected with an inverter unit B1 and an inverter unit B2, and the inverter unit B1 and the inverter unit B2 are respectively connected with motors M1 and M2.
2. The high efficiency two stage compressor inverter drive system of claim 1, wherein: the 12-pulse rectifier transformer T adopts a delta/delta connection method and a delta/Y connection method, and the delta/delta connection method is connected with the low-voltage incoming line switches QF11 and QF 12; the delta/Y connection method is connected with low-voltage incoming switches QF13 and QF 14; the 12-pulse rectifier transformer T adopts an indirect water cooling mode, and hot air of the 12-pulse rectifier transformer T indirectly exchanges heat with water through the air-water cooling heat exchanger.
3. The high efficiency two stage compressor inverter drive system of claim 1, wherein: and a frequency converter high-voltage breaking is arranged at the equipment end of the user side breaker QF1 and the isolation system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320257866.5U CN218678884U (en) | 2023-02-20 | 2023-02-20 | High-efficient doublestage compressor frequency conversion actuating system |
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| CN202320257866.5U CN218678884U (en) | 2023-02-20 | 2023-02-20 | High-efficient doublestage compressor frequency conversion actuating system |
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