CN102593868A - Distributed three-phase four-wire photovoltaic grid-connected device with electric energy adjusting function - Google Patents
Distributed three-phase four-wire photovoltaic grid-connected device with electric energy adjusting function Download PDFInfo
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- CN102593868A CN102593868A CN2012100499203A CN201210049920A CN102593868A CN 102593868 A CN102593868 A CN 102593868A CN 2012100499203 A CN2012100499203 A CN 2012100499203A CN 201210049920 A CN201210049920 A CN 201210049920A CN 102593868 A CN102593868 A CN 102593868A
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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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
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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
- Y02E40/40—Arrangements for reducing harmonics
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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
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The invention provides a distributed three-phase four-wire photovoltaic grid-connected device with an electric energy adjusting function, belonging to the technical field of a multifunctional photovoltaic grid-connected device and aiming to solve the problem that the conventional device cannot compensate an idle component, a harmonic component and an unbalanced component which are generated by a user electricity load and cannot remove pollution on a power grid caused by grid-connected currents of the components. The distributed three-phase four-wire photovoltaic grid-connected device comprises the power grid, the user electricity load, a photovoltaic array, a DC (Direct Current)/DC converter, a three-phase four-wire grid-connected inverter, a digital signal processing control unit, a circuit breaker, a first detector and a second detector. The first detector is used for detecting the output-phase current at the alternating current side of the three-phase four-wire grid-connected inverter and the input voltage and the input current of the user electricity load; and the second detector is used for detecting the output voltage and the output current of the photovoltaic array. According to the invention, the photovoltaic grid-connected device which is used for production and scientific research of multidirectional development of solar energy sources and is particularly applicable to a photovoltaic grid-connected generation device which is combined with buildings and is connected into the power grid in a three-phase four-wire manner is provided.
Description
Technical field
The invention belongs to multifunctional photovoltaic parallel device technique field, be specifically related to a kind of distributed three-phase and four-line photovoltaic grid-connected device that has the electric energy regulatory function concurrently.
Background technology
At present, known distributed three-phase and four-line photovoltaic grid-connected device is made up of solar energy photovoltaic array, DC/DC current transformer, combining inverter, generate electricity by way of merging two or more grid systems controller and corresponding protection.Under irradiation of sunlight; Distributed three-phase and four-line photovoltaic grid-connected device utilizes photovoltaic effect; Solar radiation can be directly changed into electric energy, and be connected, when enough strong illumination is arranged with electrical network; The electric energy that photovoltaic array was converted can be with the electric energy feed-in electrical network of redundance except that to the user power utilization electric.At night or intensity of illumination such as overcast and rainy when not enough, the power shortage that photovoltaic array sends, then by electrical network to part or all electric power of user load supply.But various machinery equipments come into operation in large quantities, and electric energy is drawn in dissimilar user power utilization loads from electrical network, and user power utilization load meeting inevitably produces idle component, harmonic component and unbalanced component.General distributed three-phase and four-line photovoltaic grid-connected device can only provide the electric energy that is converted with meritorious mode; Can not idle component, harmonic component and the unbalanced component of user power utilization load generating be compensated, and the grid-connected current that has these components can pollute public electric wire net.
Summary of the invention
The present invention can not compensate idle component, harmonic component and the unbalanced component of user power utilization load generating in order to solve conventional device; Can not eliminate of the pollution problem of the grid-connected current of these components, a kind of distributed three-phase and four-line photovoltaic grid-connected device that has the electric energy regulatory function concurrently of proposition to electrical network.
A kind of distributed three-phase and four-line photovoltaic grid-connected device that has the electric energy regulatory function concurrently; It comprises electrical network, user power utilization load, photovoltaic array, DC/DC converter, three-phase and four-line grid-connected converter, Digital Signal Processing control unit, circuit breaker, first detector and second detector; The dc voltage output end of photovoltaic array is connected with the dc voltage input end of DC/DC converter; The dc voltage output end of DC/DC converter is connected with the dc voltage input end of three-phase and four-line grid-connected converter; The three-phase voltage output of the AC side of three-phase and four-line grid-connected converter inserts electrical network through circuit breaker; The DC power supply changeover control signal output of Digital Signal Processing control unit is connected with the DC power supply changeover control signal input of DC/DC converter; The pwm control signal output of Digital Signal Processing control unit is connected with the pwm control signal input of three-phase and four-line grid-connected converter; First detector is used to detect the output current phase of three-phase and four-line grid-connected converter AC side and the input voltage and the electric current of user power utilization load; The testing result signal output part of first detector is connected with the first testing result signal input part of Digital Signal Processing control unit; Second detector is used to detect the output voltage and the electric current of photovoltaic array, and the testing result signal output part of second detector is connected with the second testing result signal input part of Digital Signal Processing control unit.
A kind of distributed three-phase and four-line photovoltaic grid-connected device that has the electric energy regulatory function concurrently of the present invention; Having under the situation of illumination; Not only can supply power, can also compensate the idle component harmonic component of user power utilization load generating, not have under the situation of illumination the user; Can play the effect of active power filter, the idle component harmonic component of compensation user power utilization load generating.Under the situation of intensity of illumination abundance, can under the situation of intensity of illumination deficiency, can with electric loading the part electric weight be provided to local user's electricity consumption electric and with unnecessary electric weight feed-in electrical network to the local user, not enough part is drawn from electrical network.When the present invention can gain merit energy efficient ground feed-in electrical network with the solar energy that is transformed; Compensation is because idle component, harmonic component and the unbalanced component that load is introduced; Eliminated of the pollution of the grid-connected current of these components, satisfied the needs of actual scientific research in the production of the multidirectional exploitation of this new forms of energy of solar energy to electrical network.The parallel network power generation device that is connected to the grid with the three-phase and four-line mode that is specially adapted to combine with building can realize especially that compensation network is idle, harmonic wave and the unbalanced photovoltaic grid-connected device of threephase load.
Description of drawings
Fig. 1 is a structural representation of the present invention, and Fig. 2 is the structural representation of DC/DC converter, and Fig. 3 is the structural representation of three-phase and four-line grid-connected converter, and Fig. 4 is the operation principle sketch map of Digital Signal Processing control unit.
Embodiment
Embodiment one, combination Fig. 1 explain this execution mode; A kind of distributed three-phase and four-line photovoltaic grid-connected device that has the electric energy regulatory function concurrently; It comprises electrical network 101, user power utilization load 102, photovoltaic array 103, DC/DC converter 104, three-phase and four-line grid-connected converter 105, Digital Signal Processing control unit 106, circuit breaker 108, first detector 107 and second detector 109; The dc voltage output end of photovoltaic array 103 is connected with the dc voltage input end of DC/DC converter 104; The dc voltage output end of DC/DC converter 104 is connected with the dc voltage input end of three-phase and four-line grid-connected converter 105; The three-phase voltage output of the AC side of three-phase and four-line grid-connected converter 105 inserts electrical network 101 through circuit breaker 108; The DC power supply changeover control signal output of Digital Signal Processing control unit 106 is connected with the DC power supply changeover control signal input of DC/DC converter 104; The pwm control signal output of Digital Signal Processing control unit 106 is connected with the pwm control signal input of three-phase and four-line grid-connected converter 105; First detector 107 is used to detect the output current phase of three-phase and four-line grid-connected converter 105 AC side and the input voltage and the electric current of user power utilization load 102; The testing result signal output part of first detector 107 is connected with the first testing result signal input part of Digital Signal Processing control unit 106; Second detector 109 is used to detect the output voltage and the electric current of photovoltaic array 103, and the testing result signal output part of second detector 109 is connected with the second testing result signal input part of Digital Signal Processing control unit 106.
Embodiment two, combination Fig. 2 explain this execution mode; This execution mode is with the difference of embodiment one: said DC/DC converter 104 comprises dc capacitor 201, afterflow inductance 202, power diode 203 and full-control type power device IGBT204; The dc voltage input end parallel connection direct electric capacity 201 of DC/DC converter 104; One end of dc capacitor 201 is connected with an end of afterflow inductance 202; The other end of afterflow inductance 202 is connected with the collector electrode of full-control type power device IGBT204 and the anode of power diode 203 simultaneously; The negative electrode of power diode 203 is as a dc voltage output end of DC/DC converter 104; The emitter of full-control type power device IGBT204 is connected with the other end of dc capacitor 201, and as another dc voltage output end of DC/DC converter 104, the control signal output ends of Digital Signal Processing control unit 106 is connected with the base stage of full-control type power device IGBT204.In this execution mode, IGBT is Insulated Gate Bipolar Transisitor, insulated gate bipolar transistor.
In this execution mode, the effect of DC/DC converter 104 is output voltages of regulating photovoltaic array 103, makes photovoltaic array 103 maintain the working point of maximum power output.
Embodiment three, combination Fig. 3 explain this execution mode; The difference of this execution mode and embodiment one is: said three-phase and four-line grid-connected converter 105 comprises dc bus capacitor 301, four bridge arm voltage source current transformers 302, drive circuit 303, LC type filtering output circuit 306; LC type filtering output circuit 306 comprises four filtering output circuit inductance 304 and four filtering output circuit electric capacity 305; Four brachium pontis of four bridge arm voltage source current transformers 302 are made up of four couples of full-control type power device IGBT; The emitter of the first full-control type power device IGBT of each brachium pontis is connected with the collector electrode of the second full-control type power device IGBT and an end of a filtering output circuit inductance 304 simultaneously; The other end of each filtering output circuit inductance 304 is connected with an end of a filtering output circuit electric capacity 305 respectively; Another termination the earth of each filtering output circuit electric capacity 305; The dc voltage input end parallel connection direct lateral capacitance 301 of three-phase and four-line grid-connected converter 105; The one end while of dc bus capacitor 301 is connected with the collector electrode of the first full-control type power device IGBT of each brachium pontis; The other end while of dc bus capacitor 301 is connected with the emitter of the second full-control type power device IGBT of each brachium pontis; The pwm control signal output of Digital Signal Processing control unit 106 is connected with the pwm control signal input of drive circuit 303, and four groups of drive signal outputs of drive circuit 303 are connected with the signal input end of four brachium pontis of four bridge arm voltage source current transformers 302 respectively.The difference of embodiment four, this execution mode and embodiment three is: four groups of drive signals of said drive circuit 303; Every group of drive signal has two, is connected respectively at every pair of base stage of forming each full-control type power device IGBT of a brachium pontis.
Embodiment four, combination Fig. 3 explain this execution mode; This execution mode is with the difference of embodiment three: in four groups of drive signals of said drive circuit 303; Every group of drive signal has two drive signals, and the base stage with two full-control type power device IGBT that form a brachium pontis is connected respectively.
The difference of embodiment five, this execution mode and embodiment one is: said Digital Signal Processing control unit 106 adopts 2812 type digital signal processors of TI company to realize.
Embodiment six, combination Fig. 4 explain this execution mode; This execution mode is with the difference of embodiment one: said Digital Signal Processing control unit 106 comprises MPPT maximum power point tracking control module 401, has the control module 402 that is incorporated into the power networks, grid-connected current tracking Control module 403 and protection control module 404 that electric energy is regulated concurrently; MPPT maximum power point tracking control module 401 receives the voltage and current of second detector, 109 detected photovoltaic array 103 outputs; The instantaneous output output of the photovoltaic array 103 of MPPT maximum power point tracking control module 401 is connected with the instantaneous output input of the photovoltaic array 103 of the control module 402 that is incorporated into the power networks that has the electric energy adjusting concurrently; The control module 402 that is incorporated into the power networks that has the electric energy adjusting concurrently receives 4 road voltage and currents of first detector, 107 detected user power utilization loads 102 outputs; The grid-connected current that has the control module 402 that is incorporated into the power networks of electric energy adjusting concurrently is connected with reference to the output current input with reference to the grid-connected current of output current output with grid-connected current tracking Control module 403; Grid-connected current tracking Control module 403 receives the electric current of first detector, 107 detected three-phase and four-line grid-connected converter 105 outputs; First receiving terminal of protection control module 404 receives the voltage and current of second detector, 109 detected photovoltaic array 103 outputs; Second receiving terminal of protection control module 404 receives 4 road voltage and currents of first detector, 107 detected user power utilization load 102 outputs; The 3rd receiving terminal of protection control module 404 receives the electric current of first detector, 107 detected three-phase and four-line grid-connected converter 105 outputs; The protection stopping signal output of protection control module 404 is connected with the protection stopping signal input of grid-connected current tracking Control module 403; The DC power supply changeover control signal output of MPPT maximum power point tracking control module 401 is connected with the DC power supply changeover control signal input of DC/DC converter 104, and the pwm control signal output of grid-connected current tracking Control module 403 is connected with the pwm control signal input of three-phase and four-line grid-connected converter 105.
Operation principle: first detector 107 is made up of Hall voltage transducer, Hall current sensor and multi-channel A plate.Digital Signal Processing control unit 106 adopts 2812 type digital signal processors of TI company; The function of processor mainly comprises four modules: the MPPT maximum power point tracking control module; Have the control module that is incorporated into the power networks that electric energy is regulated concurrently, grid-connected current tracking Control module and protection control module.Four modules are coordinated to be integrated in the digital signal processing chip to realize through software.
Claims (6)
1. distributed three-phase and four-line photovoltaic grid-connected device that has the electric energy regulatory function concurrently; It is characterized in that: it comprises electrical network (101), user power utilization load (102), photovoltaic array (103), DC/DC converter (104), three-phase and four-line grid-connected converter (105), Digital Signal Processing control unit (106), circuit breaker (108), first detector (107) and second detector (109); The dc voltage output end of photovoltaic array (103) is connected with the dc voltage input end of DC/DC converter (104); The dc voltage output end of DC/DC converter (104) is connected with the dc voltage input end of three-phase and four-line grid-connected converter (105); The three-phase voltage output of the AC side of three-phase and four-line grid-connected converter (105) inserts electrical network (101) through circuit breaker (108); The DC power supply changeover control signal output of Digital Signal Processing control unit (106) is connected with the DC power supply changeover control signal input of DC/DC converter (104); The pwm control signal output of Digital Signal Processing control unit (106) is connected with the pwm control signal input of three-phase and four-line grid-connected converter (105); First detector (107) is used to detect the output current phase of three-phase and four-line grid-connected converter (105) AC side and the input voltage and the electric current of user power utilization load (102); The testing result signal output part of first detector (107) is connected with the first testing result signal input part of Digital Signal Processing control unit (106); Second detector (109) is used to detect the output voltage and the electric current of photovoltaic array (103), and the testing result signal output part of second detector (109) is connected with the second testing result signal input part of Digital Signal Processing control unit (106).
2. a kind of distributed three-phase and four-line photovoltaic grid-connected device that has the electric energy regulatory function concurrently according to claim 1; It is characterized in that: said DC/DC converter (104) comprises dc capacitor (201), afterflow inductance (202), power diode (203) and full-control type power device IGBT (204); The dc voltage input end parallel connection direct electric capacity (201) of DC/DC converter (104); One end of dc capacitor (201) is connected with an end of afterflow inductance (202); The other end of afterflow inductance (202) is connected with the collector electrode of full-control type power device IGBT (204) and the anode of power diode (203) simultaneously; The negative electrode of power diode (203) is as a dc voltage output end of DC/DC converter (104); The emitter of full-control type power device IGBT (204) is connected with the other end of dc capacitor (201); And as another dc voltage output end of DC/DC converter (104), the control signal output ends of Digital Signal Processing control unit (106) is connected with the base stage of full-control type power device IGBT (204).
3. a kind of distributed three-phase and four-line photovoltaic grid-connected device that has the electric energy regulatory function concurrently according to claim 1; It is characterized in that: said three-phase and four-line grid-connected converter (105) comprises dc bus capacitor (301), four bridge arm voltage source current transformers (302), drive circuit (303), LC type filtering output circuit (306); LC type filtering output circuit (306) comprises four filtering output circuit inductance (304) and four filtering output circuit electric capacity (305); Four brachium pontis of four bridge arm voltage source current transformers (302) are made up of four couples of full-control type power device IGBT; The emitter of the first full-control type power device IGBT of each brachium pontis is connected with the collector electrode of the second full-control type power device IGBT and an end of a filtering output circuit inductance (304) simultaneously; The other end of each filtering output circuit inductance (304) is connected with an end of a filtering output circuit electric capacity (305) respectively; Another termination the earth of each filtering output circuit electric capacity (305); The dc voltage input end parallel connection direct lateral capacitance (301) of three-phase and four-line grid-connected converter (105); The one end while of dc bus capacitor (301) is connected with the collector electrode of the first full-control type power device IGBT of each brachium pontis; The other end while of dc bus capacitor (301) is connected with the emitter of the second full-control type power device IGBT of each brachium pontis; The pwm control signal output of Digital Signal Processing control unit (106) is connected with the pwm control signal input of drive circuit (303), and four groups of drive signal outputs of drive circuit (303) are connected with the signal input end of four brachium pontis of four bridge arm voltage source current transformers (302) respectively.
4. a kind of distributed three-phase and four-line photovoltaic grid-connected device that has the electric energy regulatory function concurrently according to claim 3; It is characterized in that: in four groups of drive signals of said drive circuit (303); Every group of drive signal has two drive signals, and the base stage with two full-control type power device IGBT that form a brachium pontis is connected respectively.
5. a kind of distributed three-phase and four-line photovoltaic grid-connected device that has the electric energy regulatory function concurrently according to claim 1 is characterized in that: said Digital Signal Processing control unit (106) adopts 2812 type digital signal processors of TI company to realize.
6. a kind of distributed three-phase and four-line photovoltaic grid-connected device that has the electric energy regulatory function concurrently according to claim 1; It is characterized in that: said Digital Signal Processing control unit (106) comprises MPPT maximum power point tracking control module (401), has the control module that is incorporated into the power networks (402), grid-connected current tracking Control module (403) and protection control module (404) that electric energy is regulated concurrently; MPPT maximum power point tracking control module (401) receives the voltage and current of the detected photovoltaic array of second detector (109) (103) output; The instantaneous output output of the photovoltaic array (103) of MPPT maximum power point tracking control module (401) is connected with the instantaneous output input of the photovoltaic array (103) of the control module that is incorporated into the power networks (402) that has the electric energy adjusting concurrently; The control module that is incorporated into the power networks (402) that has the electric energy adjusting concurrently receives 4 road voltage and currents of first detector (107) detected user power utilization loads (102) output; The grid-connected current that has the control module that is incorporated into the power networks (402) of electric energy adjusting concurrently is connected with reference to the output current input with reference to the grid-connected current of output current output with grid-connected current tracking Control module (403); Grid-connected current tracking Control module (403) receives the electric current of first detector (107) detected three-phase and four-line grid-connected converters (105) output; First receiving terminal of protection control module (404) receives the voltage and current of the detected photovoltaic array of second detector (109) (103) output; Second receiving terminal of protection control module (404) receives 4 road voltage and currents of the detected user power utilization load of first detector (107) (102) output; The 3rd receiving terminal of protection control module (404) receives the electric current of the detected three-phase and four-line grid-connected converter of first detector (107) (105) output; The protection stopping signal output of protection control module (404) is connected with the protection stopping signal input of grid-connected current tracking Control module (403); The DC power supply changeover control signal output of MPPT maximum power point tracking control module (401) is connected with the DC power supply changeover control signal input of DC/DC converter (104), and the pwm control signal output of grid-connected current tracking Control module (403) is connected with the pwm control signal input of three-phase and four-line grid-connected converter (105).
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| CN103501044A (en) * | 2013-10-16 | 2014-01-08 | 国家电网公司 | Three-phase four-wire uninterrupted power supply device with function of active filter |
| CN104467005A (en) * | 2014-01-02 | 2015-03-25 | 艾伏新能源科技(上海)股份有限公司 | T-type three-level three-phase four-bridge-arm grid-connected photovoltaic power generation system and control method thereof |
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| CN103501044A (en) * | 2013-10-16 | 2014-01-08 | 国家电网公司 | Three-phase four-wire uninterrupted power supply device with function of active filter |
| CN104467005A (en) * | 2014-01-02 | 2015-03-25 | 艾伏新能源科技(上海)股份有限公司 | T-type three-level three-phase four-bridge-arm grid-connected photovoltaic power generation system and control method thereof |
| CN104578162A (en) * | 2015-01-22 | 2015-04-29 | 东南大学 | Three-phase four-bridge-arm active power filter gird-connected interface and parameter design method |
| CN104578162B (en) * | 2015-01-22 | 2016-08-17 | 东南大学 | A kind of three-phase four-arm Active Power Filter-APF network interface and Parameters design |
| WO2019242128A1 (en) * | 2018-06-20 | 2019-12-26 | 浙江昱能科技有限公司 | Three-phase inverter and control method therefor |
| CN110690830A (en) * | 2018-06-20 | 2020-01-14 | 浙江昱能科技有限公司 | Three-phase inverter and control method thereof |
| WO2022011833A1 (en) * | 2020-07-15 | 2022-01-20 | 浙江昱能科技有限公司 | Three-phase inverter and control method for same |
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