CN114221545A - High-voltage gain boosting cuk circuit, control method and control device - Google Patents
High-voltage gain boosting cuk circuit, control method and control device Download PDFInfo
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- CN114221545A CN114221545A CN202111529522.7A CN202111529522A CN114221545A CN 114221545 A CN114221545 A CN 114221545A CN 202111529522 A CN202111529522 A CN 202111529522A CN 114221545 A CN114221545 A CN 114221545A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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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
Abstract
The invention relates to a high-voltage gain boosting cuk circuit, a control method and a control device, wherein the circuit comprises an input unit and a boosting unit; the input unit comprises an inductor L1、L2Capacitor C3Power switch S1、S2、S3Diode D1、D2、D5(ii) a Photovoltaic input anode and diode D1Is connected with the anode of the storage battery, the cathode of the storage battery is connected with the cathode of the storage battery input, and a power switch S3Source electrode of (2), diode D5The cathode of (a) is connected; inductor L1And a diode D1Is connected with the cathode of the power switch S at the other end3Is connected with the drain electrode of the transistor; capacitor C3And a terminal of the power switch S3Is connected with the drain electrode of the diode D, and the other end of the diode D5Anode connection of(ii) a Diode D2Anode and power switch S3Is connected to the drain of the power switch S, and the cathode is connected to the power switch S1Is connected to the source of (a); power switch S2The drain electrode of the capacitor is connected with the anode of the input of the storage battery; inductor L2And a diode D5The anode of (2) is connected; the invention realizes the integration of the multi-port DC-DC converter and the high-gain DC-DC converter.
Description
Technical Field
The invention relates to a high-voltage gain boosting cuk circuit, a control method and a control device, and belongs to the technical field of DC-DC converters.
Background
Solar energy, wind energy, hydrogen energy and the like are considered as main foundations of future world energy structures and are one of effective ways for solving energy crisis. However, the output voltage of new energy power generation monomers such as photovoltaic and fuel cell is far lower than the direct current bus voltage required by grid connection. Therefore, for such a new energy power generation system, a high-gain boost DC-DC converter is an indispensable part thereof. In addition, in the application fields of UPS power supply systems, electric vehicles, aviation power supplies, lighting smart grid systems, and the like, the high-gain boost DC-DC converter also plays an important role. The traditional boost DC-DC converter topology is influenced by main circuit parasitic parameters, and the adjustment range of voltage gain is limited. And the new energy micro power source and the energy storage unit in the traditional hybrid multi-port converter scheme are generally connected in parallel with the direct current bus through respective DC/DC converters, although the structure can solve the problems of balancing the micro-power generation output of the energy storage unit and improving the power supply stability of the system, however, because of the parallel structure of the DC/DC converter and the DC bus, the energy storage system needs to perform two times of electric energy conversion each time when charging and discharging electricity, which results in the problems of electric energy waste and low electric energy utilization rate, and the parallel structure also increases the design cost of the system and the complexity of the controller, in addition, most of the conventional multi-port converters are based on a conventional Boost converter variable structure, high gain can be rarely realized, and the high gain realized by using the coupling inductor has larger voltage and current stress of a switching tube due to leakage inductance. Therefore, the improvement of the existing parallel structure has important significance for reducing the energy conversion times of the energy storage system, improving the energy utilization rate of the system, reducing the design cost of the system, optimizing the design of the controller and realizing high gain and low stress of the switch tube.
Disclosure of Invention
In order to overcome the problems, the invention provides a high-voltage gain boosting cuk circuit, a control method and a control device, wherein the cuk circuit and the control method realize the integration of a multi-port DC-DC converter and a high-gain DC-DC converter, so that redundant power generation of photovoltaic input is stored by a storage battery, and when the photovoltaic input power is insufficient, the stored electric energy is released for load use. The number of times of electric energy conversion among photovoltaic input, storage battery and load is effectively reduced, and the electric energy use efficiency is improved.
The technical scheme of the invention is as follows:
the first part
A high-voltage gain boosting cuk circuit comprises an input unit and a boosting unit;
the input unit comprises an inductor L1、L2Capacitor C3Power switch S1、S2、S3Diode D1、D2、D5(ii) a Anode of photovoltaic input and the diode D1Is connected with the anode of the storage battery, the cathode of the storage battery is connected with the cathode of the storage battery input, and the power switch S3Source electrode of, the diode D5The cathode of (a) is connected; the inductance L1And the diode D1Is connected with the cathode of the power switch S and the other end of the power switch S3Is connected with the drain electrode of the transistor; the capacitor C3And said power switch S3Is connected with the drain electrode of the diode D, and the other end of the diode D is connected with the drain electrode of the diode5The anode of (2) is connected; the diode D2And the power switch S3Is connected to the drain of the power switch S, and the cathode is connected to the power switch S1Is connected to the source of (a); the power switch S2The drain electrode of the capacitor is connected with the anode of the input of the storage battery; the inductance L2And the diode D5The anode of (2) is connected;
the boosting unit comprises a capacitor C1、C2Diode D3、D4Said diode D3Through said capacitor C1And the diode D1Is connected to the cathode via the capacitor C2And the power switch S3Is connected with the drain electrode of the transistor; the diode D4And the power switch S3Is connected to the drain electrode of the diode D, and the cathode electrode of the diode D3The anode of (2) is connected;
the voltage of the photovoltaic input is less than the battery voltage.
Further, the negative electrode of the photovoltaic input is grounded.
Further, the inductance L2Is not connected with the diode D5One end of the connection passes through a capacitor C0And the diode D3The cathode of the capacitor C0Of both ends and the loadTwo ends are connected.
The second part
A control method of a high-voltage gain boosting cuk circuit is used for controlling any one high-voltage gain boosting cuk circuit in a first part,
when the input power of the photovoltaic input is larger than the load power of the load end, the power switch S1 is switched off, and the power switch S1Off, the power switch S2、S3Conducting;
when the input power of the photovoltaic input is smaller than the load power of a load end and the input power of the photovoltaic input and the input power of the storage battery are not 0, the power switch S2Off, the power switch S1、S3Conducting;
when the input power of the photovoltaic input is0, the power switch S2、S3Off, the power switch S1Conducting;
when the input power of the photovoltaic input is smaller than the load power of a load end, and the input power of the photovoltaic input and the input power of the storage battery are 0, the power switch S1、S2Off, the power switch S3And conducting.
Third part
A control device of a high-voltage gain boosting cuk circuit comprises a storage module, wherein the storage module is used for storing a control method of the high-voltage gain boosting cuk circuit in a second part, and the control device controls any one of the high-voltage gain boosting cuk circuits in a first part.
The invention has the following beneficial effects:
1. the cuk circuit solves the problems of low energy utilization rate, high design cost and the like of the traditional parallel structure through an integrated multi-port DC/DC converter, realizes high input and output gains through a diode capacitance inductance multiplication unit, and reduces the voltage and current stress on a main power switch tube. The method is suitable for a new energy power generation system containing an energy storage unit.
2. The cuk circuit realizes the access of the energy storage unit through the improved structure of the cuk converter, comprises five switches, and realizes photovoltaic power generation, battery charging and discharging and high-gain output.
3. The cuk circuit has loose port voltage limitation, can flexibly set the load voltage level, and greatly expands the application range of the cuk circuit. In addition, the efficiency of the converter is greatly improved due to the single stage power conversion between the power supply and the load. The high gain of input and output voltage is realized through the diode capacitor boosting unit, and the voltage and current stress of the main power switch tube is reduced.
4. The control method can simultaneously realize the switching of various working states of the SIDO, DISO and SIS0, realize one-time electric energy conversion among all ports, reduce the energy conversion times and improve the energy utilization rate.
Drawings
Fig. 1 is a schematic diagram of a cuk circuit according to an embodiment of the invention.
Fig. 2 shows the output voltage and the voltage-current waveforms of each device in a dual-input single-output state according to the embodiment of the present invention.
Fig. 3 shows the output voltage and the voltage-current waveforms of each component in the single-input dual-output state according to the embodiment of the present invention.
Fig. 4 shows the output voltage and the voltage-current waveforms of the components in the photovoltaic input single-output state according to the embodiment of the invention.
Fig. 5 shows the output voltage and the voltage-current waveform of each component in the state of single input and single output of the battery according to the embodiment of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
The first part
Example one
Referring to fig. 1, a high-voltage gain boost cuk circuit includes an input unit and a boost unit;
the input unit comprises an inductor L1、L2Capacitor C3Power switch S1、S2、S3Diode D1、D2、D5(ii) a Positive of photovoltaic inputPole and said diode D1Is connected with the anode of the storage battery, the cathode of the storage battery is connected with the cathode of the storage battery input, and the power switch S3Source electrode of, the diode D5The cathode of (a) is connected; the inductance L1And the diode D1Is connected with the cathode of the power switch S and the other end of the power switch S3Is connected with the drain electrode of the transistor; the capacitor C3And said power switch S3Is connected with the drain electrode of the diode D, and the other end of the diode D is connected with the drain electrode of the diode5The anode of (2) is connected; the diode D2And the power switch S3Is connected to the drain of the power switch S, and the cathode is connected to the power switch S1Is connected to the source of (a); the power switch S2The drain electrode of the capacitor is connected with the anode of the input of the storage battery; the inductance L2And the diode D5The anode of (2) is connected;
the boosting unit comprises a capacitor C1、C2Diode D3、D4Said diode D3Through said capacitor C1And the diode D1Is connected to the cathode via the capacitor C2And the power switch S3Is connected with the drain electrode of the transistor; the diode D4And the power switch S3Is connected to the drain electrode of the diode D, and the cathode electrode of the diode D3The anode of (2) is connected;
the voltage of the photovoltaic input is less than the battery voltage.
Further, the negative electrode of the photovoltaic input is grounded.
Further, the inductance L2Is not connected with the diode D5One end of the connection passes through a capacitor C0And the diode D3The cathode of the capacitor C0Are connected to both ends of the load.
The second part
Example two
A control method of a high-voltage gain boost cuk circuit is used for controlling the high-voltage gain boost cuk circuit in any one of the first part,
when the input power of the photovoltaic input is larger than that of the load endThe power switch S1 is turned off, and the power switch S is turned on1Off, the power switch S2、S3Conducting; at this time, the cuk circuit works in a single-input dual-output (SIDO) mode, the photovoltaic input supplies power to the load and the storage battery input, and referring to fig. 2, the input voltage u of the photovoltaic input under the SIDO working condition is shown aspvThe output voltage and voltage current waveform of each component are 30V.
When the input power of the photovoltaic input is smaller than the load power of a load end and the input power of the photovoltaic input and the input power of the storage battery are not 0, the power switch S2Off, the power switch S1、S3Conducting; at this time, the cuk circuit works in a dual-input single-output (DISO) mode, the photovoltaic input and the storage battery supply power to the load together, referring to FIG. 3, under the DISO working condition, the input voltage u of the photovoltaic inputpvAt 30V, the input voltage u of the storage batterybThe output voltage and voltage current waveform of each component are 40V.
When the input power of the photovoltaic input is0, the power switch S2、S3Off, the power switch S1Conducting; at this time, the cuk circuit operates in a Single Input Single Output (SISO) mode of the battery input that alone supplies power to the load, referring to fig. 4, for an SISO operating condition of the battery input, the input voltage u of the battery inputbThe output voltage and voltage current waveform of each component are 40V.
When the input power of the photovoltaic input is smaller than the load power of a load end, and the input power of the photovoltaic input and the input power of the storage battery are 0, the power switch S1、S2Off, the power switch S3And conducting. At this time, the cuk circuit operates in a Single Input Single Output (SISO) mode of the photovoltaic input, the photovoltaic input alone supplies power to the load, and referring to fig. 5, the input voltage u of the photovoltaic input is under the SISO operating condition of the photovoltaic inputpvThe output voltage and voltage current waveform of each component are 30V.
Third part
A control device of a high-voltage gain boosting cuk circuit comprises a storage module, wherein the storage module is used for storing a control method of the high-voltage gain boosting cuk circuit in a second part, and the control device controls any one high-voltage gain boosting cuk circuit in a first part.
The above description is only an example of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures made by using the contents of the present specification and the attached drawings, or applied directly or indirectly to other related technical fields, are included in the scope of the present invention.
Claims (5)
1. A high-voltage gain boosting cuk circuit is characterized by comprising an input unit and a boosting unit;
the input unit comprises an inductor L1、L2Capacitor C3Power switch S1、S2、S3Diode D1、D2、D5(ii) a Anode of photovoltaic input and the diode D1Is connected with the anode of the storage battery, the cathode of the storage battery is connected with the cathode of the storage battery input, and the power switch S3Source electrode of, the diode D5The cathode of (a) is connected; the inductance L1And the diode D1Is connected with the cathode of the power switch S and the other end of the power switch S3Is connected with the drain electrode of the transistor; the capacitor C3And said power switch S3Is connected with the drain electrode of the diode D, and the other end of the diode D is connected with the drain electrode of the diode5The anode of (2) is connected; the diode D2And the power switch S3Is connected to the drain of the power switch S, and the cathode is connected to the power switch S1Is connected to the source of (a); the power switch S2The drain electrode of the capacitor is connected with the anode of the input of the storage battery; the inductance L2And the diode D5The anode of (2) is connected;
the boosting unit comprises a capacitor C1、C2Diode D3、D4Said diode D3Through said capacitor C1And the diode D1Is connected to the cathode via the capacitor C2And the power switch S3Is connected with the drain electrode of the transistor; the diode D4And the power switch S3Is connected to the drain electrode of the diode D, and the cathode electrode of the diode D3The anode of (2) is connected;
the voltage of the photovoltaic input is less than the battery voltage.
2. The high voltage gain boost cuk circuit according to claim 1, characterized in that the negative pole of the photovoltaic input is grounded.
3. The high-voltage gain boost cuk circuit according to claim 1, wherein said inductor L2Is not connected with the diode D5One end of the connection passes through a capacitor C0And the diode D3The cathode of the capacitor C0Are connected to both ends of the load.
4. A control method of a high-voltage gain boost cuk circuit, for controlling the high-voltage gain boost cuk circuit of any one of claims 1-3,
when the input power of the photovoltaic input is larger than the load power of the load end, the power switch S1 is switched off, and the power switch S1Off, the power switch S2、S3Conducting;
when the input power of the photovoltaic input is smaller than the load power of a load end and the input power of the photovoltaic input and the input power of the storage battery are not 0, the power switch S2Off, the power switch S1、S3Conducting;
when the input power of the photovoltaic input is0, the power switch S2、S3Off, the power switch S1Conducting;
when the input power of the photovoltaic input is smaller than the load power of a load end, and the input power of the photovoltaic input and the input power of the storage battery are 0, the power switch S1、S2Off, the power switch S3And conducting.
5. A control device of a high-voltage gain boosting cuk circuit, which is characterized by comprising a storage module, wherein the storage module is used for storing the control method of the high-voltage gain boosting cuk circuit in claim 4, and the control device controls the high-voltage gain boosting cuk circuit in any one of claims 1 to 3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111529522.7A CN114221545A (en) | 2021-12-14 | 2021-12-14 | High-voltage gain boosting cuk circuit, control method and control device |
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| CN202111529522.7A CN114221545A (en) | 2021-12-14 | 2021-12-14 | High-voltage gain boosting cuk circuit, control method and control device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117254669A (en) * | 2023-11-14 | 2023-12-19 | 中山市宝利金电子有限公司 | Binary multiport converter based on switch coupling inductance |
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| US20140177304A1 (en) * | 2012-12-24 | 2014-06-26 | Laurence P. Sadwick | Constant Current Source |
| CN112350573A (en) * | 2020-11-13 | 2021-02-09 | 福州大学 | Boost-improved Boost gain Cuk converter single-switch DC-DC circuit |
| CN113098271A (en) * | 2021-04-23 | 2021-07-09 | 南京理工大学 | High-gain three-port DC-DC converter based on switch capacitor |
| CN214674892U (en) * | 2021-03-08 | 2021-11-09 | 中国长江电力股份有限公司 | High-gain three-port DC/DC converter |
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2021
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Patent Citations (5)
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| US20100259241A1 (en) * | 2009-04-11 | 2010-10-14 | Cuks, Llc | Voltage step-down switching DC-to-DC converter |
| US20140177304A1 (en) * | 2012-12-24 | 2014-06-26 | Laurence P. Sadwick | Constant Current Source |
| CN112350573A (en) * | 2020-11-13 | 2021-02-09 | 福州大学 | Boost-improved Boost gain Cuk converter single-switch DC-DC circuit |
| CN214674892U (en) * | 2021-03-08 | 2021-11-09 | 中国长江电力股份有限公司 | High-gain three-port DC/DC converter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117254669A (en) * | 2023-11-14 | 2023-12-19 | 中山市宝利金电子有限公司 | Binary multiport converter based on switch coupling inductance |
| CN117254669B (en) * | 2023-11-14 | 2024-02-02 | 中山市宝利金电子有限公司 | Binary multiport converter based on switch coupling inductance |
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