CN101241377B - Photovoltaic grid-connected circuit topological structure - Google Patents
Photovoltaic grid-connected circuit topological structure Download PDFInfo
- Publication number
- CN101241377B CN101241377B CN2007100170430A CN200710017043A CN101241377B CN 101241377 B CN101241377 B CN 101241377B CN 2007100170430 A CN2007100170430 A CN 2007100170430A CN 200710017043 A CN200710017043 A CN 200710017043A CN 101241377 B CN101241377 B CN 101241377B
- Authority
- CN
- China
- Prior art keywords
- circuit
- chip
- transformer
- power
- amplifier
- 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
- 238000004804 winding Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 abstract 2
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000033772 system development Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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)
- Control Of Electrical Variables (AREA)
Abstract
The invention discloses a photovoltaic interconnected circuit topological structure. An interconnected inverter composed of a PSOC system on a programmable sheet, a multiplicator circuit, a D power amplifier and a PLL phase lock loop circuit between a solar cell panel and a transformer. An L electric inductance and a Ug equivalent electric network are connected in series at the two terminals of the voltage transformer secondary side. Terminal voltage and circuitry current generated by the solar panel are real time sampled by using POSC system on a programmable sheet, and is compared with the feedback voltage and current. PWM output of the D power amplifier in the single end reverse exciting negative feedback circuit is regulated by comparison of powers of two timepoints, to make the solar cell panel to work at the maximum power output point, and increase electric generation efficiency of the photovoltaic interconnected network. The invention excuses exterior wave filter, and decreases electromagnetic interference (EMI). The excused exterior wave filter greatly decreases both space requirement of the circuit board and cost of a plurality of portable and compact applications.
Description
Technical field
The present invention relates to the solar photovoltaic grid-connection system, particularly improve solar panel output power, make solar electric power supply system be operated in the novel photovoltaic grid-connected circuit topological structure of peak power output point.
Background technology
Sun power is a kind of regenerative resource of clean and effective; solar panel becomes electric energy for use conversion of solar energy; present typical photovoltaic parallel in system comprises: photovoltaic array, DC-DC converter, inverter and integrated protective relaying device; wherein, conventional inverter needs an outside low-pass filter to extract the signal of 50HZ from pulse-width signal (PWM) output waveform.The problem that the conventional photovoltaic combining inverter exists: 1. conventional inverter circuit major defect is to need outside LC filtering circuit, this has not only increased the total cost of scheme and volume, weight, and reduced electrical efficiency, moreover, the more important thing is because the modulation harmonic wave is excessive,, still have sizable harmonic component even if added the LC filtering circuit, generally at THD about 10%, quite serious for the pollution of electrical network; 2. the conventional inverter output waveform is a high frequency square wave, and has precipitous transition edge, so output spectrum can comprise a large amount of spectrum energies at switching frequency and switching frequency frequency multiplication place.So EMI (electromagnetic interference (EMI)) poor-performing.3. the conventional inverter volume is bigger, is unfavorable for the circuit board space requirement.In order to make solar panel be operated in the peak power output point, mostly adopt complicated software and hardware to realize that the solar cell maximum power point carries out tracking Control at present, the present means that adopt are to use the single-chip microcomputer of embedded software and complicated peripheral circuit thereof to realize that its cost of products is higher, volume is unfavorable for using greatly on portable/compact product.
Summary of the invention
For addressing the above problem, the present invention is intended to propose a kind of novel photovoltaic grid-connected circuit topological structure that mainly is made of combining inverter PSOC programmable system on chip and class D amplifier.
The present invention is so realization: photovoltaic grid-connected circuit topological structure is characterized in that: be provided with by PSOC programmable system on chip, multiplier circuit, D power-like amplifier and PLL phase-locked loop circuit at solar panel and transformer bay and form combining inverter; Solar panel output terminal two-way, one the tunnel connects an input channel of D power-like amplifier and the input end of PSOC programmable system on chip respectively, another road directly is connected with the former limit of transformer one end, and D power-like amplifier output channel is connected with the former limit of the transformer other end; PSOC programmable system on chip output terminal is connected with the multiplier circuit input end, the multiplier circuit output terminal connects D power-like amplifier one input channel, and the PLL phase-locked loop circuit connects and composes the single-ended reverse exciting negative-feedback circuit with multiplier circuit and transformer secondary winding terminal respectively; Transformer secondary two ends series connection L inductance and Ug equivalence electrical network.
The acp chip of PSOC programmable system on chip is that model is the CY8C29466 chip.
Beneficial effect of the present invention is: utilize the POSC programmable system on chip to carry out real-time sampling for terminal voltage and the line current that solar panel produced, and and the feedback voltage electric current compare, adjust the PWM output of the D power-like amplifier in the single-ended reverse exciting negative-feedback circuit by the power ratio in two moment, make solar panel be operated in maximum power point (mpp), improve the efficient of parallel network power generation, the present invention removes external filter from and reduces electromagnetic interference (EMI), the external filter that saves has not only reduced the circuit board space requirement, has significantly reduced a lot of portable simultaneously, the cost of compact applications.
Description of drawings
Fig. 1 is circuit theory diagrams of the present invention;
Fig. 2 is a MPPT maximum power point tracking control algolithm process flow diagram of the present invention;
Among Fig. 1: 1. solar panel; 2. transformer; 3.PSOC programmable system on chip; 4. multiplier circuit; 5.D power-like amplifier; 6.PLL phase-locked loop circuit; 7.Ug equivalent electrical network.
Formula symbol among Fig. 2 is described, and k is a time parameter.
Voltage derivative du; K transient voltage u (k); K-1 transient voltage u (k-1); Voltage increment Δ (u);
Current differential di; K immediate current i (k); K-1 immediate current i (k-1); Current increment Δ (i);
Control voltage uref; Control voltage minus tolerance uref-C; Control voltage principal-employment uref+C.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
As shown in Figure 1, photovoltaic grid-connected circuit topological structure of the present invention is provided with by PSOC programmable system on chip 3, multiplier circuit 4, D power-like amplifier 5 and PLL phase-locked loop circuit 6 at solar panel 1 and 2 in transformer and forms combining inverter; Solar panel 1 output terminal two-way, one the tunnel connects an input channel of D power-like amplifier 5 and the input end of PSOC programmable system on chip 3 respectively, another road directly is connected with transformer 2 former limits one end, and D power-like amplifier 5 output channels are connected with the transformer 2 former limit other ends; PSOC programmable system on chip 3 output terminals are connected with multiplier circuit 4 input ends, multiplier circuit 4 output terminals connect D power-like amplifier 5 one input channels, and PLL phase-locked loop circuit 6 connects and composes the single-ended reverse exciting negative-feedback circuit with multiplier circuit 4 and transformer 2 secondary winding terminals respectively; Transformer 2 secondary two ends series connection L inductance and Ug equivalence electrical network 7.The present invention adopts the D class A amplifier A to adopt PWM to export the feedback loop of device input, the linearity that closed loop policy not only can be improved device to, and has an inhibition ability of power supply instability, interference, feedback control loop with noise shaping function can lower greatly by pulse-width modulator, output stage and supply voltage and depart from the non-linear noise that causes.The acp chip of PSOC programmable system on chip 3 is that model is the CY8C29466 chip, adopt PSOC programmable system on chip 3 can realize using chip piece just can be configured to have the microcontroller of multiple different peripheral components, set up a kind of configurable embedded microcontroller, in order to realize from determining that systemic-function begins to divide to software/hardware, and finish the whole process of design, therefore can adapt to very complicated real-time demand for control, use it and can improve research and development of products efficient greatly, reduce the complicacy and the expense of system development, enhanced system wants reliability and antijamming capability simultaneously.
As depicted in figs. 1 and 2, the present invention will be described by photovoltaic grid-connected circuit topological structure of the present invention and MPPT maximum power point tracking control algolithm process flow diagram thereof.
Step 100: start beginning;
Step 101:PSOC programmable system on chip begins test side voltage and line current;
Step 102: (time parameter is integer k=1 to the two adjacent moment, 2,3,) terminal voltage differential du=u (k)-u (k-1) and line current differential di=i (k)-i (k-1) and analyze automatically its terminal voltage increment Delta (u)=-increment Delta (the i)=di*u (k) of du*i (k) and line current, promptly the terminal voltage of moment and the variation of line current are analyzed automatically;
Step 103: current increment Δ (i) and voltage increment Δ (u) are compared, if Δ (i)=Δ (u) then control voltage and equate that step 104 turns back to step 100, and output uref is controlled meritorious output;
If the current increment Δ (i) and the voltage increment Δ (u) of step 103 are unequal, then carry out step 105;
Step 105: greater than current increment, promptly Δ (u)＞Δ (i) then carry out step 106 as if voltage increment, and control voltage uref equals to control voltage minus tolerance uref-C, i.e. meritorious output of uref=uref-C, and output uref control; If if voltage increment is not more than current increment, then carry out step 107, control voltage uref equals to control voltage principal-employment uref+C, and the meritorious output of output uref control.
Claims (2)
1. photovoltaic grid-connected circuit topological structure is characterized in that: be provided with by PSOC programmable system on chip, multiplier circuit, D power-like amplifier and PLL phase-locked loop circuit at solar panel and transformer bay and form combining inverter; Solar panel output terminal two-way, one the tunnel connects an input channel of D power-like amplifier and the input end of PSOC programmable system on chip respectively, another road directly is connected with the former limit of transformer one end, and D power-like amplifier output channel is connected with the former limit of the transformer other end; PSOC programmable system on chip output terminal is connected with the multiplier circuit input end, the multiplier circuit output terminal connects D power-like amplifier one input channel, and the PLL phase-locked loop circuit connects and composes the single-ended reverse exciting negative-feedback circuit with multiplier circuit and transformer secondary winding terminal respectively; Transformer secondary two ends series connection L inductance and Ug equivalence electrical network.
2. photovoltaic grid-connected circuit topological structure according to claim 1 is characterized in that: the acp chip of described PSOC programmable system on chip is that model is the CY8C29466 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100170430A CN101241377B (en) | 2007-08-24 | 2007-08-24 | Photovoltaic grid-connected circuit topological structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100170430A CN101241377B (en) | 2007-08-24 | 2007-08-24 | Photovoltaic grid-connected circuit topological structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101241377A CN101241377A (en) | 2008-08-13 |
| CN101241377B true CN101241377B (en) | 2011-02-09 |
Family
ID=39932947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100170430A Expired - Fee Related CN101241377B (en) | 2007-08-24 | 2007-08-24 | Photovoltaic grid-connected circuit topological structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101241377B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107528319A (en) * | 2017-09-27 | 2017-12-29 | 张京伦 | A kind of electromagnetic type electric regenerative harmonic suppression apparatus |
| CN112964197B (en) * | 2021-03-23 | 2022-04-29 | 哈尔滨工业大学 | Micro-sphere surface morphology detection device based on negative feedback phase-locked vibration suppression |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1230709A (en) * | 1998-03-30 | 1999-10-06 | 三洋电机株式会社 | Solar generating device |
| CN1627225A (en) * | 2003-12-12 | 2005-06-15 | 台达电子工业股份有限公司 | Method for tracing maximum power for solar power system and equipment |
-
2007
- 2007-08-24 CN CN2007100170430A patent/CN101241377B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1230709A (en) * | 1998-03-30 | 1999-10-06 | 三洋电机株式会社 | Solar generating device |
| CN1627225A (en) * | 2003-12-12 | 2005-06-15 | 台达电子工业股份有限公司 | Method for tracing maximum power for solar power system and equipment |
Non-Patent Citations (1)
| Title |
|---|
| 赵宏,潘俊民.基于Boost电路的光伏电池最大功率点跟踪系统.《电力电子技术》.2004,第38卷(第3期),55-57. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101241377A (en) | 2008-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Nahar et al. | Analysis the performance of interleaved boost converter | |
| CN101582592B (en) | Transformer-less photovoltaic merging and inverting device and control method thereof | |
| Roy et al. | High step-up transformerless inverter for AC module applications with active power decoupling | |
| US8111528B2 (en) | DC to AC inverter | |
| CN101958660A (en) | Dual-Sepic buck-boost output parallel combined inverter | |
| US20220263428A1 (en) | Power converting apparatus and photovoltaic module including the same | |
| CN104702221A (en) | PWM (pulse width modulation) audio power amplifier | |
| CN104578856A (en) | Single-stage non-isolated non-electrolytic-capacitor double-Zeta inverter | |
| CN105529925A (en) | Boost convertor based on switch inductor | |
| Sutikno et al. | Advanced DC–DC converter topologies for solar energy harvesting applications: a review | |
| CN205232057U (en) | Single -phase two -stage formula photovoltaic inverter | |
| Harfman-Todorovic et al. | A high efficiency PV micro-inverter with grid support functions | |
| CN203660883U (en) | Electrical energy conversion device | |
| Maheshwari et al. | Control of integrated quadratic boost sepic converter for high gain applications | |
| CN101969274B (en) | Bus voltage stabilization control device | |
| CN101241377B (en) | Photovoltaic grid-connected circuit topological structure | |
| Rage et al. | A transformerless common ground‐based 1‐ϕ single‐stage switched boost inverter for solar photovoltaic applications | |
| Chen et al. | Progressive smooth transition for four-switch buck-boost converter in photovoltaic applications | |
| CN106787736B (en) | A kind of biswitch high step-up ratio PWM DC converter | |
| Sulaiman et al. | Design of high efficiency DC-DC converter for photovoltaic solar home applications | |
| CN204465463U (en) | PWM power amplifier | |
| CN103580476A (en) | Electric energy conversion device and method for determining optimal parallel connection number of direct-current circuits of electric energy conversion device | |
| Abolhasani et al. | A comparison between buck and boost topologies as module integrated converters to mitigate partial shading effects on PV arrays | |
| Devi et al. | An Insight to High Gain DC-DC Power Converters for Low Voltage PV System | |
| CN113659863B (en) | Double-end common-ground inverter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Free format text: FORMER OWNER: MA DELIN Free format text: FORMER OWNER: ZHAO JIANQING Effective date: 20110824 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 361012 XIAMEN, FUJIAN PROVINCE TO: 361015 XIAMEN, FUJIAN PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20110824 Address after: 361015 workshop No. 32, No. 1 torch East Road, Huli District, Xiamen, Fujian Patentee after: Maishitong Electric Apparatus Co., Ltd., Xiamen Address before: Xiange Siming District of Xiamen city in Fujian Province in 141-201 361012 Co-patentee before: Ma Delin Patentee before: Zhao Jianqing |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110209 Termination date: 20120824 |