CN201234142Y - Bus control apparatus for solar photovoltaic grid connection DC-to-AC converter - Google Patents
Bus control apparatus for solar photovoltaic grid connection DC-to-AC converter Download PDFInfo
- Publication number
- CN201234142Y CN201234142Y CNU2008200364351U CN200820036435U CN201234142Y CN 201234142 Y CN201234142 Y CN 201234142Y CN U2008200364351 U CNU2008200364351 U CN U2008200364351U CN 200820036435 U CN200820036435 U CN 200820036435U CN 201234142 Y CN201234142 Y CN 201234142Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- bus
- diode
- effect transistor
- field effect
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
Landscapes
- Inverter Devices (AREA)
Abstract
The utility model discloses a bus control device of a solar photovoltaic grid-connected inverter. The bus control device comprises a boosting circuit, a bus circuit, an inverter bridge circuit, a filter circuit, a sampling circuit and a control circuit, wherein the boosting circuit is electrically connected with the bus circuit; the bus circuit is electrically connected with the inverter bridge circuit; the inverter bridge circuit is electrically connected with the filter circuit; and the voltage signal of the bus circuit is sampled by the sampling circuit and is transmitted to the control circuit to control the boosting circuit through the control circuit. The bus control circuit can change the state of a bus voltage working at a fixed voltage value to real-timely adjust the voltage value along with the voltage fluctuation of the power grid, so that the inverter has lower power loss and lower harmonics of output current in the presence of lower voltage of the external power grid.
Description
Technical field
The utility model relates to a kind of solar photovoltaic interconnected inverter, specifically, relates to a kind of solar photovoltaic interconnected inverter bus control device.
Background technology
At present solar photovoltaic interconnected inverter median generatrix voltage when design always design stability do not change at a specific voltage with the external electrical network voltage condition, cause the own loss of inverter when externally line voltage is low to strengthen, output current harmonics is higher.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, providing a kind of can change with the external electrical network voltage condition, make that the own loss of inverter was little when externally line voltage was low, the solar photovoltaic interconnected inverter bus control device that output current harmonics is lower.
The technical scheme that realizes above-mentioned purpose is: a kind of solar photovoltaic interconnected inverter bus control device, its improvement is: comprise booster circuit, bus circuit, inverter bridge circuit, filter circuit, sample circuit and control circuit, booster circuit is electrically connected with bus circuit, bus circuit is electrically connected with the inverter bridge circuit, the inverter bridge circuit is electrically connected with filter circuit, the voltage signal of bus circuit is given control circuit after the sample circuit sampling, and by control circuit control booster circuit.
The utility model has changed the state of prior art median generatrix voltage power supply at fixed voltage value, make bus voltage value with voltage ripple of power network real-time regulated, make that the own loss of inverter was little when externally line voltage was low, output current harmonics is lower.Owing to control circuit can change the output voltage of booster circuit along with the change of outer net voltage, filter circuit can carry out Filtering Processing with inverter output current, thereby makes output current harmonics can reach required value.
Description of drawings
Fig. 1 is a use block diagram of the present utility model;
Fig. 2 is the circuit diagram of embodiment.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
With reference to Fig. 1,2, a kind of solar photovoltaic interconnected inverter bus control device, comprise booster circuit 2, bus circuit 3, inverter bridge circuit 4, filter circuit 5, sample circuit 7 and control circuit 8, booster circuit 2 is electrically connected with bus circuit 3, bus circuit 3 is electrically connected with inverter bridge circuit 4, inverter bridge circuit 4 is electrically connected with filter circuit 5, and the voltage signal of bus circuit 3 is given control circuit 8 after sample circuit 7 samplings, and by control circuit 8 control booster circuits 2.Booster circuit 2 external solar cells 1, filter circuit 5 is connected with external electrical network 6 by relay switch S1, S2, external electrical network 6 voltage signals send control circuit 8 after sample circuit 7 samplings, and control booster circuits 2 to the bus voltage value that requires by control circuit 8.
Described booster circuit 2 comprises inductance L 1, field effect transistor Q1 and diode D0, D1, described bus circuit 3 comprises capacitor C 1, C2, one end of the inductance L 1 in the booster circuit 2 is the power supply positive input terminal, the other end of inductance L 1 is electrically connected with a end by the circuit after field effect transistor Q1 and the diode D1 parallel connection, be connected and be connected to the power-input by the end in the other end of the circuit after field effect transistor Q1 and the diode D1 parallel connection and the bus circuit 3, by being serially connected with diode D0 between the other end of the circuit after in parallel in an end of the circuit after field effect transistor Q1 and the diode D1 parallel connection and the bus circuit 3 by capacitor C 1 and C2 by the circuit after capacitor C 1 and the C2 parallel connection.
Described inverter bridge circuit 4 comprises field effect transistor Q2, Q3, Q4, Q5 and diode D2, D3, D4, D5, diode D2 is in parallel with field effect transistor Q2, diode D3 is in parallel with field effect transistor Q3, diode D4 is in parallel with field effect transistor Q4, diode D5 is in parallel with field effect transistor Q5, and the parallel circuits of field effect transistor Q2 and diode D2 is with in parallel with capacitor C 3 again after the parallel circuits of field effect transistor Q4 and diode D4 is connected, and the parallel circuits of field effect transistor Q3 and diode D3 is with also in parallel with capacitor C 3 after the parallel circuits of field effect transistor Q5 and diode D5 is connected.
Described filter circuit 5 comprises inductance L 2, L3 and capacitor C 4, and the input of filter circuit 5 is connected with the output of inverter bridge circuit 4.
The controller that control circuit 8 adopts can also can be single-chip microcomputer or other microprocessor for digital signal processor.Used the TI2407 digital signal processor (DSP) of TI company in the present embodiment.Control circuit 8 is formed by the TI2407 digital signal processor and by the disclosed standard peripheral circuit that TI company provides, and the TI2407 digital signal processor can buy on market.
When the utility model uses, the sample detecting of not stopping by voltage V1 to external electrical network 6, detect the situation of the fluctuation of line voltage in real time, by feeding back to control circuit, according to the busbar voltage that samples, regulate the duty ratio of exporting the driving pulsewidth of boosting again, thereby determine different bus operating voltages, make that the whole efficiency of device is promoted, output current harmonics is lower.
Claims (5)
1, a kind of solar photovoltaic interconnected inverter bus control device, it is characterized in that: comprise booster circuit (2), bus circuit (3), inverter bridge circuit (4), filter circuit (5), sample circuit (7) and control circuit (8), booster circuit (2) is electrically connected with bus circuit (3), bus circuit (3) is electrically connected with inverter bridge circuit (4), inverter bridge circuit (4) is electrically connected with filter circuit (5), the voltage signal of bus circuit (3) is given control circuit (8) after sample circuit (7) sampling, and by control circuit (8) control booster circuit (2).
2, solar photovoltaic interconnected inverter bus control device according to claim 1, it is characterized in that: described booster circuit (2) comprises inductance L 1, field effect transistor Q1 and diode D0, D1, described bus circuit (3) comprises capacitor C 1, C2, one end of the inductance L 1 in the booster circuit (2) is the power supply positive input terminal, the other end of inductance L 1 is electrically connected with a end by the circuit after field effect transistor Q1 and the diode D1 parallel connection, be connected and be connected to the power-input by the end in the other end of the circuit after field effect transistor Q1 and the diode D1 parallel connection and the bus circuit (3), by being serially connected with diode D0 between the other end of the circuit after in parallel in an end of the circuit after field effect transistor Q1 and the diode D1 parallel connection and the bus circuit (3) by capacitor C 1 and C2 by the circuit after capacitor C 1 and the C2 parallel connection.
3, solar photovoltaic interconnected inverter bus control device according to claim 1 and 2, it is characterized in that: described inverter bridge circuit (4) comprises field effect transistor Q2, Q3, Q4, Q5 and diode D2, D3, D4, D5, diode D2 is in parallel with field effect transistor Q2, diode D3 is in parallel with field effect transistor Q3, diode D4 is in parallel with field effect transistor Q4, diode D5 is in parallel with field effect transistor Q5, and the parallel circuits of field effect transistor Q2 and diode D2 is with in parallel with capacitor C 3 again after the parallel circuits of field effect transistor Q4 and diode D4 is connected, and the parallel circuits of field effect transistor Q3 and diode D3 is with also in parallel with capacitor C 3 after the parallel circuits of field effect transistor Q5 and diode D5 is connected.
4, solar photovoltaic interconnected inverter bus control device according to claim 1 and 2, it is characterized in that: described filter circuit (5) comprises inductance L 2, L3 and capacitor C 4, and the input of filter circuit (5) is connected with the output of inverter bridge circuit (4).
5, solar photovoltaic interconnected inverter bus control device according to claim 1 and 2 is characterized in that: the controller that control circuit (8) adopts can also can be single-chip microcomputer for digital signal processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200364351U CN201234142Y (en) | 2008-06-06 | 2008-06-06 | Bus control apparatus for solar photovoltaic grid connection DC-to-AC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200364351U CN201234142Y (en) | 2008-06-06 | 2008-06-06 | Bus control apparatus for solar photovoltaic grid connection DC-to-AC converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201234142Y true CN201234142Y (en) | 2009-05-06 |
Family
ID=40620530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200364351U Expired - Fee Related CN201234142Y (en) | 2008-06-06 | 2008-06-06 | Bus control apparatus for solar photovoltaic grid connection DC-to-AC converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201234142Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101902050A (en) * | 2009-05-28 | 2010-12-01 | 通用电气公司 | The solar power generation that contains the weather unit of PV module and separative power converter |
| CN101969274A (en) * | 2010-09-21 | 2011-02-09 | 电子科技大学 | Bus voltage stabilization control device |
| CN102055316A (en) * | 2009-11-02 | 2011-05-11 | Abb研究有限公司 | Non-isolated DC-DC converter assembly |
| CN102593871A (en) * | 2012-03-13 | 2012-07-18 | 华为技术有限公司 | Bus voltage regulating method device for inverter |
| CN103730911A (en) * | 2013-12-25 | 2014-04-16 | 常熟开关制造有限公司(原常熟开关厂） | Grid connection method of photovoltaic grid connection inverter and photovoltaic grid connection power generating system |
| CN105762834A (en) * | 2016-03-11 | 2016-07-13 | 深圳茂硕电气有限公司 | Photovoltaic inverter intelligent starting control system |
| WO2018206010A1 (en) * | 2017-05-12 | 2018-11-15 | Huawei Technologies Co., Ltd. | Power systems with inverter input voltage control |
-
2008
- 2008-06-06 CN CNU2008200364351U patent/CN201234142Y/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101902050A (en) * | 2009-05-28 | 2010-12-01 | 通用电气公司 | The solar power generation that contains the weather unit of PV module and separative power converter |
| CN102055316A (en) * | 2009-11-02 | 2011-05-11 | Abb研究有限公司 | Non-isolated DC-DC converter assembly |
| CN102055316B (en) * | 2009-11-02 | 2014-03-12 | Abb研究有限公司 | Solar power station including non-isolated DC-DC converter assembly |
| CN101969274A (en) * | 2010-09-21 | 2011-02-09 | 电子科技大学 | Bus voltage stabilization control device |
| CN101969274B (en) * | 2010-09-21 | 2013-04-17 | 电子科技大学 | Bus voltage stabilization control device |
| CN102593871B (en) * | 2012-03-13 | 2014-08-20 | 华为技术有限公司 | Bus voltage regulating method and device for inverter |
| CN102593871A (en) * | 2012-03-13 | 2012-07-18 | 华为技术有限公司 | Bus voltage regulating method device for inverter |
| CN103730911A (en) * | 2013-12-25 | 2014-04-16 | 常熟开关制造有限公司(原常熟开关厂） | Grid connection method of photovoltaic grid connection inverter and photovoltaic grid connection power generating system |
| CN103730911B (en) * | 2013-12-25 | 2015-08-19 | 常熟开关制造有限公司(原常熟开关厂） | The grid-connected control method of photovoltaic combining inverter and grid-connected photovoltaic system |
| CN105762834A (en) * | 2016-03-11 | 2016-07-13 | 深圳茂硕电气有限公司 | Photovoltaic inverter intelligent starting control system |
| WO2018206010A1 (en) * | 2017-05-12 | 2018-11-15 | Huawei Technologies Co., Ltd. | Power systems with inverter input voltage control |
| CN110521077A (en) * | 2017-05-12 | 2019-11-29 | 华为技术有限公司 | Power-supply system with inverter input voltage control |
| US10536002B2 (en) | 2017-05-12 | 2020-01-14 | Futurewei Technologies, Inc. | Power systems with inverter input voltage control |
| US11437823B2 (en) | 2017-05-12 | 2022-09-06 | Huawei Digital Power Technologies Co., Ltd. | Power systems with inverter input voltage control |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201234142Y (en) | Bus control apparatus for solar photovoltaic grid connection DC-to-AC converter | |
| CN107153137B (en) | The monitoring device and method of DCM booster converter inductance and output capacitance | |
| CN103698640A (en) | Intelligent charging detection circuit and movable power supply | |
| WO2016019667A1 (en) | Charging circuit and system for rechargeable battery | |
| CN104506055A (en) | Adaptive voltage output power circuit and power source device | |
| CN205051931U (en) | LED's drive power supply | |
| CN202798440U (en) | Intelligent braking unit for inverters | |
| CN102684322B (en) | Energy collecting and voltage stabilizing power supply circuit based on taking electricity by using high-voltage power wires | |
| CN204290758U (en) | Adaptive voltage output power supply circuit and supply unit | |
| CN204131401U (en) | A kind of photovoltaic DC-to-AC converter DC/DC booster circuit | |
| CN104506069A (en) | Non-isolation type photovoltaic grid-connected inverter | |
| CN102299629A (en) | Power supply control method and power supply device for direct-current high-voltage power supply | |
| CN207053403U (en) | The low-power dissipation high pressure power module of Geiger Miller detector | |
| CN203554283U (en) | High power direct current converting circuit and photovoltaic system | |
| CN106940392B (en) | External circuit breaker of electric energy meter with automatic switching-on and switching-off function | |
| CN202218460U (en) | DC coupled buck-boost solar LED power source | |
| CN202159241U (en) | Voltage regulating and voltage stabilizing DSP control device | |
| CN202009259U (en) | Quick intelligent switching power supply charger | |
| CN201594746U (en) | Series-output-based electric energy feedback type electronic load | |
| CN205750611U (en) | A kind of regulator control circuit | |
| WO2017031694A1 (en) | Power supply of single-phase electronic electric energy meter | |
| CN204168206U (en) | Lithium battery light storage electricity generation system inverter circuit | |
| CN203127981U (en) | Intelligent charger control system of magnetism holding system of hoisting electromagnet | |
| CN202135070U (en) | Dual-voltage capacitance-resistance voltage-reduction energy saving circuit | |
| CN204334306U (en) | The power supply circuits of the renewable new forms of energy power supply of a kind of low pressure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090506 Termination date: 20150606 |
|
| EXPY | Termination of patent right or utility model |