CN114356021A - MPPT series regulator bypass device - Google Patents
MPPT series regulator bypass device Download PDFInfo
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- CN114356021A CN114356021A CN202111581139.6A CN202111581139A CN114356021A CN 114356021 A CN114356021 A CN 114356021A CN 202111581139 A CN202111581139 A CN 202111581139A CN 114356021 A CN114356021 A CN 114356021A
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- bypass device
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- 239000003990 capacitor Substances 0.000 claims description 6
- 238000013461 design Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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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
An MPPT series regulator bypass device comprising: the solar power supply comprises a command control circuit, a driving circuit and a power unit, wherein a first end of the command control circuit is connected with a solar cell, a second end of the command control circuit is connected with a first end of the driving circuit, a first end of the power unit is connected with a second end of the driving circuit, and a second end of the power unit is connected with a bus. The MPPT series regulator bypass device provided by the invention judges whether a fault occurs through the working mode of the MPPT series regulator, and when the disconnection of the series regulator and a bus is detected, an instruction is sent to enable the bypass device to act, so that the direct loss of the primary solar cell array power after the fault of the series regulator is avoided, the volume and the weight of a system are reduced, and the reliability of the system is improved; a bypass protection circuit is formed by connecting the MOSFET and the diode in series, energy supply from the solar cell to the bus is guaranteed after the MOSFET is connected, the problem that the system power is lost for one level after the series regulator is disconnected is solved, and the design has the characteristics of safety and reliability.
Description
Technical Field
The invention belongs to the technical field of space power controllers, and particularly relates to a MPPT series regulator bypass device.
Background
At present, the topology structures of a spacecraft power supply system are mainly divided into two types: direct Energy Transfer (DET) and peak power tracking (MPPT). A conventional DET or MPPT failure mode is shown in fig. 1 and 2.
The DET approach uses a shunt regulator to handle excess power from the solar array, thereby regulating or limiting the bus voltage during the illumination period. Due to the shunting voltage limiting function of the shunt regulator, the working point of the solar cell is set at the optimal working voltage of the solar cell array at the end stage, and the initial power loss is large.
In the MPPT method, a series switching regulator is introduced between a solar cell and a bus bar, and the output power of a solar cell array is utilized to the maximum. The MPPT method has obvious advantages in the adoption of electrically propelled satellites, orbitally diversified satellites and the like.
The coping strategy of the traditional DET or MPPT for the failure mode is to design a multi-level redundancy circuit, and a 1-2-level regulation circuit is allowed to be directly lost. The area of the solar panel must be increased to satisfy the energy balance, which leads to the increase of the volume and weight of the whole star.
Disclosure of Invention
To solve the above problems, the present invention provides an MPPT series regulator bypass device, including: the solar power supply comprises a command control circuit, a driving circuit and a power unit, wherein a first end of the command control circuit is connected with a solar cell, a second end of the command control circuit is connected with a first end of the driving circuit, a first end of the power unit is connected with a second end of the driving circuit, and a second end of the power unit is connected with a bus.
Preferably, the instruction control circuit includes: a resistor R1 and a resistor R2, wherein a first end of the resistor R1 is connected to the solar cell, a second end of the resistor R2 is connected to the driving circuit and the first end of the resistor R2, and a second end of the resistor R2 is grounded.
Preferably, the method further comprises the following steps: a capacitor C1, the capacitor C1 is connected with the resistor R2 in parallel.
Preferably, the driving circuit includes: the power unit comprises a resistor R3, a resistor R4 and a transistor Q1, wherein a first end of the resistor R3 is connected with the power unit, a second end of the resistor R4 is connected with a second end of the resistor R3, a collector of the transistor Q1 is connected with a second end of the resistor R4, an emitter of the transistor Q1 is grounded, and a base of the transistor Q1 is connected with a second end of the resistor R1 in the command control circuit.
Preferably, the driving circuit further includes: and the anode of the voltage stabilizing diode D1 is connected with the second end of the resistor R3, and the cathode of the voltage stabilizing diode D1 is connected with the first end of the resistor R3.
Preferably, the power unit includes: a thyristor M1 and a diode D2, wherein the collector of the thyristor M1 is connected to the anode of the diode D2.
The application provides a MPPT series regulator bypass device has following beneficial effect:
the MPPT series regulator bypass device provided by the invention judges whether a fault occurs through the working mode of the MPPT series regulator, and when the disconnection of the series regulator and a bus is detected, an instruction is sent to enable the bypass device to act, so that the direct loss of the primary solar cell array power after the fault of the series regulator is avoided, the volume and the weight of a system are reduced, and the reliability of the system is improved; a bypass protection circuit is formed by connecting the MOSFET and the diode in series, energy supply from the solar cell to the bus is guaranteed after the MOSFET is connected, the problem that the system power is lost for one level after the series regulator is disconnected is solved, and the design has the characteristics of safety and reliability.
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, and 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 these drawings without creative efforts.
Fig. 1 is a conventional DET failure mode;
FIG. 2 is a conventional MPPT failure mode;
FIG. 3 is a schematic diagram of an MPPT series regulator bypass arrangement provided by the present invention;
fig. 4 is a block circuit diagram of an MPPT series regulator bypass device according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
In an embodiment of the present application, as shown in fig. 3-4, the present invention provides an MPPT series regulator bypass device, comprising: the solar power supply comprises a command control circuit, a driving circuit and a power unit, wherein a first end of the command control circuit is connected with a solar cell, a second end of the command control circuit is connected with a first end of the driving circuit, a first end of the power unit is connected with a second end of the driving circuit, and a second end of the power unit is connected with a bus.
When the utility model provides a MPPT series regulator bypass device during operation, MPPT series regulator bypass device can continuously detect being connected of series regulator and generating line, and after detecting series regulator and generating line disconnection, send the instruction and make the bypass device action, avoids directly losing one-level solar array power behind the series regulator trouble, has reduced the volume of system, weight, has improved the reliability of system.
In an embodiment of the present application, the instruction control circuit includes: a resistor R1 and a resistor R2, wherein a first end of the resistor R1 is connected to the solar cell, a second end of the resistor R2 is connected to the driving circuit and the first end of the resistor R2, and a second end of the resistor R2 is grounded.
In an embodiment of the present application, the instruction control circuit further includes: a capacitor C1, the capacitor C1 is connected with the resistor R2 in parallel.
In an embodiment of the present application, the driving circuit includes: the power unit comprises a resistor R3, a resistor R4 and a transistor Q1, wherein a first end of the resistor R3 is connected with the power unit, a second end of the resistor R4 is connected with a second end of the resistor R3, a collector of the transistor Q1 is connected with a second end of the resistor R4, an emitter of the transistor Q1 is grounded, and a base of the transistor Q1 is connected with a second end of the resistor R1 in the command control circuit.
In an embodiment of the present application, the driving circuit further includes: and the anode of the voltage stabilizing diode D1 is connected with the second end of the resistor R3, and the cathode of the voltage stabilizing diode D1 is connected with the first end of the resistor R3.
In an embodiment of the present application, the power unit includes: a thyristor M1 and a diode D2, wherein the collector of the thyristor M1 is connected to the anode of the diode D2.
In the embodiment of the application, the command control signal controls the base of the transistor Q1 through the low-pass filter, and the driving circuit controls the level driving signal through the zener diode D1, thereby controlling the on and off of the MOSFET in the power unit. When the MPPT series regulator fails, the command control signal sends a high level command, the triode Q1 is in saturated conduction, the collector electrode is conducted to the ground, the voltage stabilizing diode D1 breaks down, the driving end of the power tube MOSFET M1 keeps a high level, the M1 is conducted, and the solar battery provides energy for the bus through the M1 and the diode D2.
In the embodiment of the application, the bypass protection circuit provides a power path after the fault for the series regulator, so that the voltage of the solar cell is converted from an optimal working point to be clamped by the bus voltage, and the power loss is reduced from 100% to 20%. Therefore, the circuit function design, the circuit structure design and the bypass protection mechanism of the invention have novelty, and have obvious effects on reducing the weight of a power supply system and improving the reliability and the safety of a control system.
The MPPT series regulator bypass device provided by the invention judges whether a fault occurs through the working mode of the MPPT series regulator, and when the disconnection of the series regulator and a bus is detected, an instruction is sent to enable the bypass device to act, so that the direct loss of the primary solar cell array power after the fault of the series regulator is avoided, the volume and the weight of a system are reduced, and the reliability of the system is improved; a bypass protection circuit is formed by connecting the MOSFET and the diode in series, energy supply from the solar cell to the bus is guaranteed after the MOSFET is connected, the problem that the system power is lost for one level after the series regulator is disconnected is solved, and the design has the characteristics of safety and reliability.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (6)
1. An MPPT series regulator bypass device, comprising: the solar power supply comprises a command control circuit, a driving circuit and a power unit, wherein a first end of the command control circuit is connected with a solar cell, a second end of the command control circuit is connected with a first end of the driving circuit, a first end of the power unit is connected with a second end of the driving circuit, and a second end of the power unit is connected with a bus.
2. The MPPT series regulator bypass device of claim 1, wherein the command control circuit includes: a resistor R1 and a resistor R2, wherein a first end of the resistor R1 is connected to the solar cell, a second end of the resistor R2 is connected to the driving circuit and the first end of the resistor R2, and a second end of the resistor R2 is grounded.
3. The MPPT series regulator bypass device of claim 2, further comprising: a capacitor C1, the capacitor C1 is connected with the resistor R2 in parallel.
4. The MPPT series regulator bypass device of claim 1, wherein the drive circuit includes: the power unit comprises a resistor R3, a resistor R4 and a transistor Q1, wherein a first end of the resistor R3 is connected with the power unit, a second end of the resistor R4 is connected with a second end of the resistor R3, a collector of the transistor Q1 is connected with a second end of the resistor R4, an emitter of the transistor Q1 is grounded, and a base of the transistor Q1 is connected with a second end of the resistor R1 in the command control circuit.
5. The MPPT series regulator bypass device of claim 4, wherein the drive circuit further comprises: and the anode of the voltage stabilizing diode D1 is connected with the second end of the resistor R3, and the cathode of the voltage stabilizing diode D1 is connected with the first end of the resistor R3.
6. The MPPT series regulator bypass device of claim 1, wherein the power unit includes: a thyristor M1 and a diode D2, wherein the collector of the thyristor M1 is connected to the anode of the diode D2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111581139.6A CN114356021A (en) | 2021-12-22 | 2021-12-22 | MPPT series regulator bypass device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111581139.6A CN114356021A (en) | 2021-12-22 | 2021-12-22 | MPPT series regulator bypass device |
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| CN114356021A true CN114356021A (en) | 2022-04-15 |
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| CN202111581139.6A Pending CN114356021A (en) | 2021-12-22 | 2021-12-22 | MPPT series regulator bypass device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100002349A1 (en) * | 2008-07-01 | 2010-01-07 | Stmicroelectronics S.R.I. | By-pass diode structure for strings of series connected cells of a photovoltaic panel |
| US20150131187A1 (en) * | 2013-11-08 | 2015-05-14 | The Board Of Trustees Of The University Of Illinois | Systems and Methods for Photovoltaic String Protection |
| CN108899987A (en) * | 2018-09-25 | 2018-11-27 | 福建师范大学 | A kind of solar charging electric control circuit with MPPT function |
| CN109347313A (en) * | 2018-10-25 | 2019-02-15 | 大禹电气科技股份有限公司 | Bypass module for high voltage transducer power unit |
| CN211456991U (en) * | 2020-01-17 | 2020-09-08 | 卧龙电气集团辽宁荣信电气传动有限公司 | High-power unit bypass device based on permanent magnet contactor |
-
2021
- 2021-12-22 CN CN202111581139.6A patent/CN114356021A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100002349A1 (en) * | 2008-07-01 | 2010-01-07 | Stmicroelectronics S.R.I. | By-pass diode structure for strings of series connected cells of a photovoltaic panel |
| US20150131187A1 (en) * | 2013-11-08 | 2015-05-14 | The Board Of Trustees Of The University Of Illinois | Systems and Methods for Photovoltaic String Protection |
| CN108899987A (en) * | 2018-09-25 | 2018-11-27 | 福建师范大学 | A kind of solar charging electric control circuit with MPPT function |
| CN109347313A (en) * | 2018-10-25 | 2019-02-15 | 大禹电气科技股份有限公司 | Bypass module for high voltage transducer power unit |
| CN211456991U (en) * | 2020-01-17 | 2020-09-08 | 卧龙电气集团辽宁荣信电气传动有限公司 | High-power unit bypass device based on permanent magnet contactor |
Non-Patent Citations (1)
| Title |
|---|
| 胡斌;李玲;冯利军;: "一种空间锂离子电池自主旁路方法", 电源技术, no. 08 * |
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Effective date of registration: 20221128 Address after: 300384 No. 6 Huake No. 7 Road, Binhai New Area, Tianjin Binhai High-tech Industrial Development Zone Applicant after: The 18th Research Institute of China Electronics Technology Group Corporation Address before: 300384 No. 6 Huake No. 7 Road, Binhai New Area, Tianjin Binhai High-tech Industrial Development Zone Applicant before: The 18th Research Institute of China Electronics Technology Group Corporation Applicant before: CETC Energy Co.,Ltd. |
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