CN109962481B - Three-phase independent three-level parallel active power quality device - Google Patents
Three-phase independent three-level parallel active power quality device Download PDFInfo
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- CN109962481B CN109962481B CN201910283052.7A CN201910283052A CN109962481B CN 109962481 B CN109962481 B CN 109962481B CN 201910283052 A CN201910283052 A CN 201910283052A CN 109962481 B CN109962481 B CN 109962481B
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- 239000003990 capacitor Substances 0.000 claims abstract description 27
- 230000017525 heat dissipation Effects 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims description 8
- 238000005192 partition Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 abstract 1
- 238000005070 sampling Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000000428 dust Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1842—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention discloses a three-phase independent three-level parallel active electric energy quality device which comprises a rectangular shell, wherein a fan drive board is arranged on the inner side surface of the rectangular shell, a plurality of radiating fans are arranged on the fan drive board, a bus capacitor plate, a power inverter plate and an input safety filter plate are sequentially arranged on the bottom surface of the rectangular shell along the air exhaust direction of the radiating fans, the power inverter plate comprises an A-phase power inverter single plate, a B-phase power inverter single plate and a C-phase power inverter single plate which are arranged side by side, and the input safety filter plate is connected with a four-bit through terminal; an auxiliary power supply board and a relay board are further installed on the bottom surface of the rectangular shell, and a control board and a detection interface board are further installed above the input insurance filtering board. The technical scheme of the invention improves the internal structure layout of the active power quality device, accelerates the heat dissipation, improves the stability of the system, and simultaneously realizes the switching of single phase and three phases.
Description
Technical Field
The invention relates to the technical field of active power quality devices, in particular to a three-phase independent three-level parallel active power quality device.
Background
With the application of various nonlinear and time-varying electronic devices, the problems of harmonic waves, reactive power, unbalanced three-phase current and other electric energy quality in an electric power system become more serious, and a parallel active electric energy quality device (SAPQC) can simultaneously solve the three problems and is more and more widely applied. In the prior art, the SAPQC apparatus has two design schemes as follows: 1. a three-level IGBT integrated power module is used as a main loop power device; 2. a three-level main loop is built by adopting a discrete IGBT and a diode element. However, when the IGBT integrated power module is used, the capacitors on the heat sink and the PCB are highly stacked, which results in a high total height of the active module, which is not conducive to multiple parallel operation. In addition, the module is generally physically connected and divided into an inverter board and an inductance board, and each single board contains three-phase related devices, so that the module cannot be flexibly applied to single-phase requirements. In the scheme of using discrete components, except three-phase integration, a main circuit device with large heat productivity and a control circuit device with small heat productivity are positioned in the same air duct, and the pins of the component power components are positioned in the air duct, so that the overall reliability of the active module is adversely affected.
Disclosure of Invention
The invention mainly aims to provide a three-phase independent three-level parallel active power quality device, aiming at improving the internal structure layout of the active power quality device, accelerating heat dissipation, improving the stability of a system and realizing the switching between single phase and three phase.
In order to achieve the purpose, the three-phase independent three-level parallel active power quality device provided by the invention comprises a rectangular shell, wherein a fan drive board is arranged on the inner side surface of the rectangular shell, a plurality of radiating fans are arranged on the fan drive board, a bus capacitor plate, a power inverter plate and an input safety filter plate are sequentially arranged on the bottom surface of the rectangular shell along the air exhaust direction of the radiating fans, the power inverter plate comprises an A-phase power inverter single plate, a B-phase power inverter single plate and a C-phase power inverter single plate which are arranged side by side, and the input safety filter plate is connected with a four-position through terminal; an auxiliary power supply board and a relay board are further installed on the bottom surface of the rectangular shell, and a control board and a detection interface board are further installed above the input security filter board; any power inversion single board comprises a single-phase diode clamping three-level branch, the single-phase diode clamping three-level branch comprises four IGBT single tubes and two diode single tubes, two radiators are symmetrically installed on any power inversion single board, the bottoms of the two radiators are respectively provided with the two IGBT single tubes and the two diode single tubes, an IGBT driving plate and a PVC baffle plate used for driving the IGBT single tubes are additionally arranged between the two radiators, and the PVC baffle plate is covered on the single-phase diode clamping three-level branch and the IGBT driving plate along the air exhaust direction of the cooling fan.
Preferably, the four IGBT single tubes include IGBT single tubes T1, T2, T3, and T4, the two diode single tubes include diode single tubes D1 and D2, the IGBT single tube T1, the diode single tube D1, and the IGBT single tube T2 are sequentially installed at the bottom of one radiator along the exhaust direction of the cooling fan, and the IGBT single tube T4, the diode single tube D2, and the IGBT single tube T3 are sequentially installed at the bottom of the other radiator along the exhaust direction of the cooling fan.
Preferably, the bus capacitor plate is provided with three groups of bus capacitors respectively corresponding to the power inverter single plate, each group of bus capacitors comprises two capacitors, and the three groups of bus capacitors are arranged at intervals.
Preferably, the rectangular shell is further additionally provided with a partition board, the partition board divides the rectangular shell into a main air duct and an auxiliary air duct, the fan drive board, the bus capacitor board, the power inverter board, the input insurance filter board, the control board and the detection interface board are arranged in the main air duct, and the auxiliary power supply board and the relay board are arranged in the auxiliary air duct.
Preferably, an LCD display panel is further added on the outer side of the rectangular casing.
Preferably, the number of the heat dissipation fans on the fan driving board is four, and the heat dissipation fans are arranged side by side.
Compared with the prior art, the invention has the beneficial effects that:
1. the discrete power device is utilized, the integral thickness is reduced, the interior adopts a modular design, the assembly is easy, and the damage is easy to replace;
2. the power inversion single board comprises a complete single-phase three-level circuit topology, and a module can be flexibly changed from a three-phase circuit to a single-phase circuit;
3. the power inversion single board adopts discrete components to build a three-level topology, and the components are placed according to the power flow direction, so that the area contained in a power loop is minimum, and the EMC performance of a module can be improved. And the PVC baffle is added between the radiators, so that the power tube and the IGBT drive board are isolated outside the main air duct, and the reliability of the system is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of an active power quality device of the present invention;
FIG. 2 is a functional block diagram of the active power quality device of the present invention;
FIG. 3 is a main circuit topology diagram of the present invention;
FIG. 4 is a schematic structural view of a PVC baffle installed on a main power inversion single board according to the present invention;
FIG. 5 is a schematic structural view of a main power inverter board of the present invention without a PVC baffle;
FIG. 6 is a schematic diagram of a portion of a single-phase diode-clamped three-level branch circuit of the present invention;
FIG. 7 is a schematic diagram of a single-phase diode-clamped three-level branch power circuit of the present invention;
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
Referring to fig. 1, the active power quality device includes a rectangular casing 15, a fan drive board 8 is mounted on an inner side surface of the rectangular casing 15, a plurality of heat dissipation fans 81 are mounted on the fan drive board 8, a bus capacitor plate 3, a power inverter plate 2 and an input security filter plate 1 are sequentially mounted on a bottom surface of the rectangular casing 15 along an air exhaust direction of the heat dissipation fans 81, the power inverter plate 2 includes an a-phase power inverter single plate 21, a B-phase power inverter single plate 22 and a C-phase power inverter single plate 23 which are arranged side by side, and the input security filter plate 1 is connected to a four-bit through terminal 11; an auxiliary power panel 4 and a relay panel 5 are further installed on the bottom surface of the rectangular shell 15, and a control panel 7 and a detection interface board 6 are further installed above the input insurance filter panel 1. An LCD display panel 9 is additionally arranged on the outer side face of the rectangular shell 15. The electric energy quality device of the embodiment utilizes the discrete power devices, the whole thickness is reduced, the inside adopts the modular design, the assembly is easy, and the damage and the replacement are easy; the power inversion single board comprises a complete single-phase three-level circuit topology, and a module can be flexibly changed from a three-phase circuit to a single-phase circuit.
Referring to fig. 2 and 3, the four-bit through terminal 11 is used for accessing an external three-phase power grid ac, the four-bit through terminal 11 transmits the external ac to the input safety filter board 1 through a cable with a cross-sectional area of ten square meters, the input safety filter board 1 processes the ac and then transmits the ac to the power inverter board 2 and the auxiliary power board 4, the power inverter board 2 includes a three-phase diode clamp three-level circuit, a bus absorption capacitor, an LCL output filter circuit, a power-on soft start circuit composed of a relay and a resistor, and a radiator 14, and can perform inverter inductance current sampling, output current sampling, input voltage sampling circuit and temperature sampling, and send the sampling information to the control board 7 through the detection interface board 6 for processing. The control board 7 is controlled by DSP and CPLD. The power inverter board 2 is further connected with the bus capacitor board 3, the bus capacitor board 3 comprises a bus capacitor, a bus EMI filter circuit and a bus voltage sampling circuit, and bus voltage can be sampled and sent to the control board 7 to be processed. The auxiliary power panel 4 adopts a two-stage flyback topology, and provides 24V and +/-15V voltage for the whole device. The detection interface board 6 comprises interfaces for circuit boards, external interfaces and a signal processing circuit, and the fan driving board 8, the relay board 5 and the LCD display board 9 are all connected with the detection interface board 6. The fan driving board 8 comprises a fan driving circuit, a speed regulating circuit and a fault feedback circuit, the relay board 5 provides eight relay control dry contact points and a 12V power supply for the outside, the relay control dry contact points and the 12V power supply are mainly used for controlling the thyristor switching device, and the LCD display board 9 is used for displaying module information and performing man-machine interaction.
Referring to fig. 4 and 5, any power inverter board includes a single-phase diode-clamped three-level branch 211, the single-phase diode-clamped three-level branch 211 includes four IGBT single tubes and two diode single tubes, two radiators 14 are symmetrically installed on any power inverter board, two IGBT single tubes and one diode single tube are respectively installed at the bottoms of the radiators 14, an IGBT drive board 10 and a PVC baffle 12 for driving the IGBT single tubes are further added between the radiators 14, and the PVC baffle 12 is covered on the single-phase diode-clamped three-level branch 211 and the IGBT drive board 10 along the air exhaust direction of the heat dissipation fan 81. The radiator 14 can ensure the quick heat dissipation of the power inverter board under the action of the fan drive board 8, and meanwhile, the IGBT single tube, the diode single tube and the IGBT drive board 10 are arranged under the PVC baffle plate 12, so that the drive circuits of the power tube and the IGBT drive board 10 are not directly exposed in the air channel, the heat dissipation is ensured, meanwhile, the device can be prevented from being polluted by dust, and the service life and the system stability are improved.
Further, referring to fig. 6 and 7, the fourth IGBT single tube includes IGBT single tubes T1, T2, T3, and T4, the second diode single tube includes diode single tubes D1 and D2, the IGBT single tube T1, the diode single tube D1, and the IGBT single tube T2 are sequentially installed at the bottom of one radiator 14 along the air exhaust direction of the cooling fan 81, and the IGBT single tube T4, the diode single tube D2, and the IGBT single tube T3 are sequentially installed at the bottom of the other radiator 14 along the air exhaust direction of the cooling fan 81. The power tubes are arranged according to the power flow direction, so that the power loop comprises the smallest area, and the EMC performance of the module can be improved.
Further, the bus capacitor plate 3 is provided with three groups of bus capacitors respectively corresponding to the power inversion single plates, each group of bus capacitors comprises two capacitors, and the three groups of bus capacitors are arranged at intervals and flow out of an air duct for the heat dissipation of the radiator 14 and the rear inductor.
Further, a partition plate 13 is additionally arranged on the rectangular shell 15, the rectangular shell 15 is divided into a main air duct and an auxiliary air duct by the partition plate 13, the fan drive plate 8, the bus capacitor plate 3, the power inverter plate 2, the input safety filter plate 1, the control plate 7 and the detection interface plate 6 are arranged in the main air duct, and the auxiliary power supply plate 4 and the relay plate 5 are arranged in the auxiliary air duct. It should be noted that the auxiliary power supply board 4 and the relay board 5 are precise in structure and are arranged in the auxiliary air duct, so that the problems of short circuit, corrosion and the like caused by pollution of dust in the air duct can be prevented.
Further, the number of the heat dissipation fans 81 on the fan driving board 8 is four, and the heat dissipation fans 81 are arranged side by side, so that wind power and heat dissipation uniformity are guaranteed, and heat dissipation is accelerated.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (5)
1. A three-phase independent three-level parallel active power quality device is characterized by comprising a rectangular shell, wherein a fan drive board is installed on the inner side surface of the rectangular shell, a plurality of radiating fans are installed on the fan drive board, a bus capacitor plate, a power inverter plate and an input safety filter plate are sequentially installed on the bottom surface of the rectangular shell along the air exhaust direction of the radiating fans, the power inverter plate comprises an A-phase power inverter single plate, a B-phase power inverter single plate and a C-phase power inverter single plate which are arranged side by side, and the input safety filter plate is connected with a four-position through terminal; an auxiliary power supply board and a relay board are further installed on the bottom surface of the rectangular shell, and a control board and a detection interface board are further installed above the input security filter board; any power inversion single board comprises a single-phase diode clamping three-level branch, the single-phase diode clamping three-level branch comprises four IGBT single tubes and two diode single tubes, two radiators are symmetrically mounted on any power inversion single board, the bottoms of the two radiators are respectively provided with the two IGBT single tubes and the one diode single tube, an IGBT drive board and a PVC baffle plate for driving the IGBT single tubes are additionally arranged between the two radiators, and the PVC baffle plate is covered on the single-phase diode clamping three-level branch and the IGBT drive board along the air exhaust direction of the cooling fan;
the four IGBT single tubes comprise IGBT single tubes T1, T2, T3 and T4, the two diode single tubes comprise diode single tubes D1 and D2, the IGBT single tube T1, the diode single tube D1 and the IGBT single tube T2 are sequentially installed at the bottom of one radiator along the air exhaust direction of the cooling fan, and the IGBT single tube T4, the diode single tube D2 and the IGBT single tube T3 are sequentially installed at the bottom of the other radiator along the air exhaust direction of the cooling fan.
2. The apparatus of claim 1, wherein the bus capacitor plate has three sets of bus capacitors corresponding to the power inverter board, each set of bus capacitors includes two capacitors, and the three sets of bus capacitors are spaced apart.
3. The apparatus of claim 1, wherein the rectangular housing further comprises a partition dividing the rectangular housing into a main duct and an auxiliary duct, the fan driving board, the bus capacitor board, the power inverter board, the input fuse filter board, the control board and the detection interface board are disposed in the main duct, and the auxiliary power board and the relay board are disposed in the auxiliary duct.
4. A three-phase freestanding three-level parallel active power quality device as claimed in claim 1, wherein an LCD panel is added to the outside of the rectangular housing.
5. A three-phase freestanding three-level parallel active power quality device according to claim 1, wherein the number of the heat dissipation fans on the fan driving board is set to four, and the heat dissipation fans are arranged side by side.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910283052.7A CN109962481B (en) | 2019-04-09 | 2019-04-09 | Three-phase independent three-level parallel active power quality device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910283052.7A CN109962481B (en) | 2019-04-09 | 2019-04-09 | Three-phase independent three-level parallel active power quality device |
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| Publication Number | Publication Date |
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| CN109962481A CN109962481A (en) | 2019-07-02 |
| CN109962481B true CN109962481B (en) | 2023-04-14 |
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| CN112104195A (en) * | 2020-09-09 | 2020-12-18 | 青岛鼎信通讯股份有限公司 | Device current conversion module structural design is administered to high protection low voltage |
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| CN202486230U (en) * | 2012-02-16 | 2012-10-10 | 宝山钢铁股份有限公司 | Device for testing inversion unit component of three-level frequency converter |
| CN103825430A (en) * | 2014-03-10 | 2014-05-28 | 台州富凌电气有限公司 | Frequency converter capable of radiating by semiconductor refrigerating plates |
| CN105226961A (en) * | 2015-09-29 | 2016-01-06 | 许继电源有限公司 | A kind of modularization three level energy accumulation current converter |
| CN206196226U (en) * | 2016-11-07 | 2017-05-24 | 深圳市优优绿能电气有限公司 | Power three -phase PFC's PCB board |
| CN206211850U (en) * | 2016-11-24 | 2017-05-31 | 金舜 | Suitable for powerful high power density and high reliability frequency converter |
| CN107528482A (en) * | 2017-03-22 | 2017-12-29 | 安科瑞电气股份有限公司 | A kind of design method for optimizing inverter internal layout |
-
2019
- 2019-04-09 CN CN201910283052.7A patent/CN109962481B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202486230U (en) * | 2012-02-16 | 2012-10-10 | 宝山钢铁股份有限公司 | Device for testing inversion unit component of three-level frequency converter |
| CN103825430A (en) * | 2014-03-10 | 2014-05-28 | 台州富凌电气有限公司 | Frequency converter capable of radiating by semiconductor refrigerating plates |
| CN105226961A (en) * | 2015-09-29 | 2016-01-06 | 许继电源有限公司 | A kind of modularization three level energy accumulation current converter |
| CN206196226U (en) * | 2016-11-07 | 2017-05-24 | 深圳市优优绿能电气有限公司 | Power three -phase PFC's PCB board |
| CN206211850U (en) * | 2016-11-24 | 2017-05-31 | 金舜 | Suitable for powerful high power density and high reliability frequency converter |
| CN107528482A (en) * | 2017-03-22 | 2017-12-29 | 安科瑞电气股份有限公司 | A kind of design method for optimizing inverter internal layout |
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