CN101154115A - Method for tracing maximum power point of solar photovoltaic battery - Google Patents
Method for tracing maximum power point of solar photovoltaic battery Download PDFInfo
- Publication number
- CN101154115A CN101154115A CNA2007100989112A CN200710098911A CN101154115A CN 101154115 A CN101154115 A CN 101154115A CN A2007100989112 A CNA2007100989112 A CN A2007100989112A CN 200710098911 A CN200710098911 A CN 200710098911A CN 101154115 A CN101154115 A CN 101154115A
- Authority
- CN
- China
- Prior art keywords
- solar
- energy photo
- voltaic cell
- voltage
- solar photovoltaic
- 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.)
- Granted
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
- Control Of Electrical Variables (AREA)
- Photovoltaic Devices (AREA)
Abstract
The present invention discloses a tracing method of maximum power points of solar photovoltaic cells and belongs to the solar photovoltaic cell field. The steps of the present invention includes: (1) given voltages of solar photovoltaic cell under different intensities of sunlight are calculated and stored in a control chip; (2) the value of intensity of sunlight is read, and the given voltage of the solar photovoltaic cell under the intensity of sunlight is read according to the value of the intensity of sunlight; (3) an actual output voltage of the solar photovoltaic cell is read; a difference value between the value and the given voltage in th estp (2) is regulated with a PI regulating method; a PMW pulse is obtained by comparing the regulating result and triangular waves to drive power devices and regulate the load impedance of the solar photovoltaic cell. The control algorithm of the present invention is very simple and reliable by tracing the maximum power point of solar photovoltaic cells with a rectilinear of a specific slope, and the present invention has a strong anti-interference ability, simplifies the hardware structure of the control, reduces the cost, improves the control precision of the system effectively and improves conversion efficiency of photovoltaic generation systems.
Description
Technical field
The invention belongs to the solar-energy photo-voltaic cell field, particularly a kind of method of tracing maximum power point of solar photovoltaic battery.
Background technology
Sun power has boundless development prospect as a kind of pollution-free, reproducible new forms of energy, has obtained widespread use at home and abroad.
China is the relatively abundanter country of solar energy resources, at offshore islands, ungetable outlying mountain area, scarcely populated pasture, grassland, and away from electrical network and the also unapproachable rural area of electrical network, borderland and minority area at no distant date, solar electrical energy generation becomes a kind of reliable approach that solves production and domestic energy, can obtain good economic benefits and social benefit.According to statistics, the sun power potential resources in the whole world reaches 120000Tw, and reality can be exploited 600Tw, and this is unique energy source that can guarantee human future source of energy demand.Photovoltaic generation is a kind of important way that sun power utilizes, and by the end of the end of the year 2005, domestic photovoltaic cell productive capacity reaches more than the 200Mw.
In a photovoltaic generating system, require in office one instantaneously usually, can draw the maximum electric power of photovoltaic cell conversion, promptly system wants to follow the tracks of the maximum power point of photovoltaic cell output.Photovoltaic cell has very unique electrical specification, as Figure of description 1, shown in 2, each curve corresponds respectively to volt-ampere and the power characteristic of this photovoltaic cell when different solar radiation intensity, each curve all has separately maximum electric power point (as Figure of description 1, in 2 shown in the top-down line), when solar radiation intensity (comprising temperature etc.) when often changing, want to make full use of the maximum electric power of changing at photovoltaic cell under precondition, must between photovoltaic cell and load, add impedance transformer, according to certain algorithm and control mode, photovoltaic generating system can be exported with maximum electric power, to reach the purpose that makes full use of sun power as far as possible, i.e. the MPPT maximum power point tracking of photovoltaic cell (MPPT).
Commonly used is constant voltage tracking control technology (hereinafter to be referred as the CVT method) at present, principle is as follows: (referring to Figure of description 4), when temperature one timing, approximate think under the situation at various sunshine, the maximum power point of photovoltaic cell drops on the both sides vicinity of same perpendicular line, this just might regard the trajectory of maximum power point as a perpendicular line of voltage U=const (experience is chosen for (0.75-0.80) open-circuit voltage doubly usually) approx, as long as that is think that the output end voltage of photovoltaic cell is a constant, consider at that time corresponding electric current under the intensity of sunshine again, just can roughly track at this moment photovoltaic cell Maximum Power Output, in view of the above, complicated MPPT maximum power point tracking algorithm, be reduced to constant voltage and follow the tracks of (CVT).This method, not only computing is very simple, reliable, and antijamming capability is strong, and has simplified the hardware configuration of controller to a certain extent, so this method has obtained widespread use in middle-size and small-size photovoltaic generation product.But obviously there is error in CVT on control accuracy, and special improper when choosing at voltage, sooner or later and four seasons difference variation acutely and during situation such as intensity of sunshine is more weak, error is bigger, thereby has finally reduced the conversion efficiency of photovoltaic cell.
On the mathematical meaning, real maximum power tracing is meant that system can both accurately follow the tracks of the peak power of solar cell under any temperature and sunshine condition, be also referred to as TMPPT.At present, the most frequently used control method is the disturbance observation.
As Fig. 2 of Figure of description, the disturbance observation obtains the battery current output power by the detection to photovoltaic cell output voltage, electric current, it is compared with the memory power of previous moment again, thereby determines the direction that given reference voltage is adjusted.If Δ p＞0, it is in the right direction that description references voltage is adjusted, and can continue by original direction adjustment; If Δ p＜0, the anisotropy that description references voltage is adjusted needs to change the direction of adjusting.Track maximum power point according to this gradually.
The disturbance observation, algorithm is accurate, the control accuracy height, the situation of " local optimum " also may appear only tracking out in the while, and the corresponding hardware complex structure, the manufacturing cost height, reliability is relatively poor.
Summary of the invention
The object of the invention is to provide a kind of simple in structure, low cost of manufacture, can improves the maximum power point tracking precision, thereby improves the method for tracing maximum power point of solar photovoltaic battery of the conversion efficiency of photovoltaic generating system.
Technical scheme of the present invention is: a kind of tracing maximum power point of solar photovoltaic battery method is characterized in that comprising the following steps:
(1) the given magnitude of voltage of solar-energy photo-voltaic cell under the different intensity of sunshines of calculating, and be stored in the controller, specifically comprise the following steps;
1. according to the rating data of solar-energy photo-voltaic cell, maximum open circuit voltage U0m and nominal peak watt value Wp, determine an one maximum power point A, the A point coordinate is (k*U0m in solar-energy photo-voltaic cell volt-ampere characteristic table, Wp/kU0m), 0.75≤k≤0.85 wherein, concrete numerical value is by the material and the control strategy decision of photovoltaic cell;
2. measure a short-circuit current Ik and the open-circuit voltage Uok thereof of solar-energy photo-voltaic cell output current between (0.05-0.15) ampere the time, and the coordinate of determining another maximum power point B according to this be (k*U0k, Ik);
3. according to solar-energy photo-voltaic cell volt-ampere characteristic table, calculate magnitude of voltage, be the given magnitude of voltage under each intensity of sunshine of solar-energy photo-voltaic cell by the point of crossing of 2 definite straight lines of A, B and solar-energy photo-voltaic cell volt-ampere characteristic;
(2) read intensity of sunshine numerical value, read the given magnitude of voltage of solar-energy photo-voltaic cell under this intensity of sunshine according to this numerical value;
(3) controller reads the solar-energy photo-voltaic cell actual output voltage, the difference of the given voltage of this numerical value and step (2) is regulated through PI, regulate result and triangular wave and relatively obtain pwm pulse, pwm pulse driving power device, the loaded impedance of adjusting solar-energy photo-voltaic cell.
Also comprise the following steps: to measure one group short-circuit current Ik and the open-circuit voltage Uok data thereof of solar-energy photo-voltaic cell output current at (0.05-0.15) ampere-hour, by solar-energy photo-voltaic cell output power test findings, the output current point when selecting the solar-energy photo-voltaic cell real output to be peak power is as the B point coordinate.
Effect of the present invention is: under each intensity of sunshine, on control algolithm, straight line (substituting the perpendicular line of CVT method) with a certain slope, remove to follow the trail of the maximum power point of photovoltaic cell, thereby on the one hand, inherited the advantage of CVT method, computing is very simple, reliable, and antijamming capability is strong, simplify the hardware configuration of controller, reduce cost, on the other hand, the improvement of algorithm, make the maximum power point tracking precision, more, improved the control accuracy of system effectively, thereby improved the conversion efficiency of photovoltaic generating system near TMPPT.
Principle of work of the present invention is: shown in Figure of description 5, obviously, the line of each maximum power point of photovoltaic cell more is close to the straight line of a non-vertical line when different solar radiation intensity, the present invention proposes to adopt the straight line perpendicular line of CVT method (substitute) of a certain slope to remove to follow the trail of the algorithm of the maximum power point of photovoltaic cell, this straight line can be obtained by following method: show as Fig. 5, when maximum intensity of sunshine situation, find an one maximum power point A, when less intensity of sunshine situation, find its another maximum power point B, by A, 2 definite straight lines of B are institute and ask.The selection of concrete oblique line can be decided according to the situation at sunshine of locality, finds the oblique line in suitable somewhere by software program, and need not to change hardware.A large amount of experimental results show, adopt this method, and the average power when different solar radiation intensity is calculated precision, improves 9.1% than CVT method.
The present invention combines the advantage of above-mentioned two kinds of methods, simple, practical and reliable in the CVT method, on the hardware foundation with low cost, adopt the straight line (substituting the perpendicular line of CVT method) of a certain slope, remove to follow the trail of the maximum power point of photovoltaic cell, algorithm is greatly simplified than true MPPT such as disturbance observations, but system's control accuracy is more near TMPPT, and be better than the CVT method greatly, thereby improve the conversion efficiency of photovoltaic generating system.
The present invention is described further below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 is the solar-energy photo-voltaic cell volt-ampere characteristic;
Fig. 2 is the solar-energy photo-voltaic cell power characteristic;
Fig. 3 follows the tracks of CVT control principle figure for the solar-energy photo-voltaic cell constant voltage;
Fig. 4 follows the tracks of the given voltage calculation chart of CVT for the solar-energy photo-voltaic cell constant voltage;
Fig. 5 is the given voltage calculation chart of tracing maximum power point of solar photovoltaic battery method of the present invention.
Embodiment
Figure 5 shows that the given voltage calculation chart of tracing maximum power point of solar photovoltaic battery method of the present invention.
The tracing maximum power point of solar photovoltaic battery method comprises the following steps:
(1) calculates the given voltage U sp ' of solar-energy photo-voltaic cell under the different intensity of sunshines and being stored in the controller, specifically comprise the following steps;
1. according to the rating data of solar-energy photo-voltaic cell, maximum open circuit voltage U0m and nominal peak watt value Wp, determine an one maximum power point A, the A point coordinate is (k*U0m in solar-energy photo-voltaic cell volt-ampere characteristic table, Wp/kU0m), 0.75≤k≤0.85 wherein, concrete numerical value is by the material and the control strategy decision of photovoltaic cell;
2. measure the solar-energy photo-voltaic cell output current (0.05-0.15) ampere between the time a short-circuit current Ik and open-circuit voltage Uok thereof, and the coordinate of determining another maximum power point B according to this is (k*U0k, Ik), select to measure one group short-circuit current Ik and the open-circuit voltage Uok data thereof of solar-energy photo-voltaic cell output current according to the intensity of sunshine actual conditions at (0.05-0.15) ampere-hour, by solar-energy photo-voltaic cell output power test findings, the output current point when selecting the solar-energy photo-voltaic cell real output to be peak power is as the B point coordinate.
3. according to solar-energy photo-voltaic cell volt-ampere characteristic table, calculate magnitude of voltage, be the given magnitude of voltage under each intensity of sunshine of solar-energy photo-voltaic cell by the point of crossing of 2 definite straight lines of A, B and solar-energy photo-voltaic cell volt-ampere characteristic;
(2) read intensity of sunshine numerical value, read the given magnitude of voltage Usp ' of solar-energy photo-voltaic cell under the intensity of sunshine according to this numerical value;
(3) controller reads solar-energy photo-voltaic cell actual output voltage Usp, the difference of the given voltage U sp ' of this numerical value and step (2) is regulated through PI, regulate result and triangular wave and relatively obtain pwm pulse, pwm pulse driving power device, regulate the loaded impedance of solar-energy photo-voltaic cell, control principle figure sees Fig. 3.
Claims (2)
1. a tracing maximum power point of solar photovoltaic battery method is characterized in that comprising the following steps:
(1) the given magnitude of voltage of solar-energy photo-voltaic cell under the different intensity of sunshines of calculating, and be stored in the controller, specifically comprise the following steps;
1. according to the rating data of solar-energy photo-voltaic cell, maximum open circuit voltage U0m and nominal peak watt value Wp, determine an one maximum power point A, the A point coordinate is (k*U0m in solar-energy photo-voltaic cell volt-ampere characteristic table, Wp/kU0m), 0.75≤k≤0.85 wherein, concrete numerical value is by the material and the control strategy decision of photovoltaic cell;
2. measure a short-circuit current Ik and the open-circuit voltage Uok thereof of solar-energy photo-voltaic cell output current between (0.05-0.15) ampere the time, and the coordinate of determining another maximum power point B according to this be (k*U0k, Ik);
3. according to solar-energy photo-voltaic cell volt-ampere characteristic table, calculate by 2 definite straight lines of A, B and solar-energy photo-voltaic cell volt-ampere characteristic the magnitude of voltage of point of crossing, be the given magnitude of voltage under each intensity of sunshine of solar-energy photo-voltaic cell;
(2) read intensity of sunshine numerical value, read the given magnitude of voltage of solar-energy photo-voltaic cell under the intensity of sunshine according to this numerical value;
(3) controller reads the solar-energy photo-voltaic cell actual output voltage, the difference of the given voltage of this numerical value and step (2) is regulated through PI, regulate result and triangular wave and relatively obtain pwm pulse, pwm pulse driving power device, the loaded impedance of adjusting solar-energy photo-voltaic cell.
2. tracing maximum power point of solar photovoltaic battery method according to claim 1, it is characterized in that comprising the following steps: measuring one group short-circuit current Ik and the open-circuit voltage Uok data thereof of solar-energy photo-voltaic cell output current at (0.05-0.15) ampere-hour, by solar-energy photo-voltaic cell output power test findings, the output current point when selecting the solar-energy photo-voltaic cell real output to be peak power is as the B point coordinate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100989112A CN100555155C (en) | 2007-04-29 | 2007-04-29 | A kind of method of tracing maximum power point of solar photovoltaic battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100989112A CN100555155C (en) | 2007-04-29 | 2007-04-29 | A kind of method of tracing maximum power point of solar photovoltaic battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101154115A true CN101154115A (en) | 2008-04-02 |
| CN100555155C CN100555155C (en) | 2009-10-28 |
Family
ID=39255808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100989112A Expired - Fee Related CN100555155C (en) | 2007-04-29 | 2007-04-29 | A kind of method of tracing maximum power point of solar photovoltaic battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100555155C (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101902051A (en) * | 2010-07-15 | 2010-12-01 | 谢永亮 | Efficient energy conversion device for solar cell panel, array and application method |
| CN102088256A (en) * | 2010-12-16 | 2011-06-08 | 永济新时速电机电器有限责任公司 | Tracking control method for maximum power point of photovoltaic cell |
| CN102681588A (en) * | 2012-04-28 | 2012-09-19 | 友达光电股份有限公司 | Power tracking device and power tracking method |
| CN102947693A (en) * | 2010-02-05 | 2013-02-27 | 国家科学研究中心 | Method for determining characteristics of photoconverter without contact |
| CN103097974A (en) * | 2010-08-27 | 2013-05-08 | 学校法人几德学园 | Solar power generation system, control device used for solar power generation system, and control method and program for the same |
| US9000748B2 (en) | 2011-12-02 | 2015-04-07 | Industrial Technology Research Institute | Maximum power point tracking controllers and maximum power point tracking methods |
| CN105045332A (en) * | 2015-05-27 | 2015-11-11 | 安徽工程大学 | MPPT control method suitable for photovoltaic cell |
| CN106468935A (en) * | 2016-09-18 | 2017-03-01 | 中州大学 | A kind of segmented fitting seeks solaode peak power point methods |
| CN107172885A (en) * | 2014-11-07 | 2017-09-15 | 优信电子（香港）有限公司 | The appraisal procedure of maximum power point tracking device and solar module |
| CN107589776A (en) * | 2017-10-20 | 2018-01-16 | 南方电网科学研究院有限责任公司 | Maximum power point tracking method, MPPT controller and photovoltaic power generation system |
| CN107887901A (en) * | 2016-09-29 | 2018-04-06 | 维谛技术有限公司 | A kind of supplying power for photovoltaic cell system, MPPT control method and device |
| CN109240409A (en) * | 2018-10-23 | 2019-01-18 | 易事特集团股份有限公司 | Photovoltaic DC-to-AC converter electric quantity controlling method, device, computer equipment and storage medium |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101877559A (en) * | 2010-06-29 | 2010-11-03 | 苏州市职业大学 | Compound control method for fast and accurate tracking control of maximum power point of photovoltaic power generation system |
| CN102315792B (en) * | 2010-06-30 | 2015-01-14 | 比亚迪股份有限公司 | Maximum power tracking device and tracking method of solar power generation system |
-
2007
- 2007-04-29 CN CNB2007100989112A patent/CN100555155C/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102947693B (en) * | 2010-02-05 | 2015-12-09 | 国家科学研究中心 | Adopt the method for non-contact way determination photoconverter feature |
| CN102947693A (en) * | 2010-02-05 | 2013-02-27 | 国家科学研究中心 | Method for determining characteristics of photoconverter without contact |
| CN101902051A (en) * | 2010-07-15 | 2010-12-01 | 谢永亮 | Efficient energy conversion device for solar cell panel, array and application method |
| CN101902051B (en) * | 2010-07-15 | 2013-07-03 | 谢永亮 | Efficient energy conversion device for solar cell panel, array and application method |
| CN103097974A (en) * | 2010-08-27 | 2013-05-08 | 学校法人几德学园 | Solar power generation system, control device used for solar power generation system, and control method and program for the same |
| CN103097974B (en) * | 2010-08-27 | 2015-03-11 | 学校法人几德学园 | Solar power generation system, control device used for solar power generation system, and control method and program for the same |
| CN102088256A (en) * | 2010-12-16 | 2011-06-08 | 永济新时速电机电器有限责任公司 | Tracking control method for maximum power point of photovoltaic cell |
| CN102088256B (en) * | 2010-12-16 | 2012-12-19 | 永济新时速电机电器有限责任公司 | Tracking control method for maximum power point of photovoltaic cell |
| US9000748B2 (en) | 2011-12-02 | 2015-04-07 | Industrial Technology Research Institute | Maximum power point tracking controllers and maximum power point tracking methods |
| CN102681588A (en) * | 2012-04-28 | 2012-09-19 | 友达光电股份有限公司 | Power tracking device and power tracking method |
| CN107172885A (en) * | 2014-11-07 | 2017-09-15 | 优信电子（香港）有限公司 | The appraisal procedure of maximum power point tracking device and solar module |
| CN105045332A (en) * | 2015-05-27 | 2015-11-11 | 安徽工程大学 | MPPT control method suitable for photovoltaic cell |
| CN106468935A (en) * | 2016-09-18 | 2017-03-01 | 中州大学 | A kind of segmented fitting seeks solaode peak power point methods |
| CN107887901A (en) * | 2016-09-29 | 2018-04-06 | 维谛技术有限公司 | A kind of supplying power for photovoltaic cell system, MPPT control method and device |
| CN107589776A (en) * | 2017-10-20 | 2018-01-16 | 南方电网科学研究院有限责任公司 | Maximum power point tracking method, MPPT controller and photovoltaic power generation system |
| CN107589776B (en) * | 2017-10-20 | 2019-06-28 | 南方电网科学研究院有限责任公司 | Maximum power point tracking method, MPPT controller and photovoltaic power generation system |
| CN109240409A (en) * | 2018-10-23 | 2019-01-18 | 易事特集团股份有限公司 | Photovoltaic DC-to-AC converter electric quantity controlling method, device, computer equipment and storage medium |
| CN109240409B (en) * | 2018-10-23 | 2021-04-16 | 易事特集团股份有限公司 | Photovoltaic inverter electric quantity control method and device, computer equipment and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100555155C (en) | 2009-10-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100555155C (en) | A kind of method of tracing maximum power point of solar photovoltaic battery | |
| Yang et al. | Integrated size and energy management design of battery storage to enhance grid integration of large-scale PV power plants | |
| CN109888834B (en) | Photovoltaic power generation system based on improved MPPT method and storage battery self-balancing quick charging coupling control | |
| Li et al. | SolarCore: Solar energy driven multi-core architecture power management | |
| CN101783621B (en) | Global maximum power point tracking method of photovoltaic generating system and system device | |
| De Brito et al. | Evaluation of the main MPPT techniques for photovoltaic applications | |
| CN103019294B (en) | Maximum power point tracking (MPPT) method of self-adaption disturbance frequency and step | |
| CN104734195A (en) | Monitoring method of wind, photovoltaic and storage-integrated micro-grid capable of being operated in a grid-connected manner | |
| CN104734196A (en) | Monitoring device of wind, photovoltaic and storage-integrated micro-grid capable of being operated in a grid-connected manner | |
| Khemliche et al. | Bond graph modeling and optimization of photovoltaic pumping system: Simulation and experimental results | |
| CN102751729A (en) | Research method for stably controlling static voltage of electric network comprising wind farm | |
| CN102591399A (en) | Perturbation and observation method for tracking maximum power point of photovoltaic grid-connected generating system | |
| CN104734194A (en) | Wind, photovoltaic and storage-integrated micro-grid capable of being operated in a grid-connected manner | |
| Natsheh | Hybrid power systems energy management based on artificial intelligence | |
| CN102768555A (en) | High-efficiency mppt control strategy applicable to photovoltaic system | |
| CN106055017A (en) | Maximum power point tracing based solar power optimizing method and device | |
| CN110018709A (en) | Dynamic maximum power points tracking technique based on power prediction | |
| CN107017664B (en) | A kind of wind and solar hybrid generating system maximum power timesharing tracking | |
| CN103513693B (en) | Control method based on single argument current method photovoltaic maximum power tracking control system | |
| CN105226737A (en) | A kind of photovoltaic charged method of high recovery rate and device | |
| CN102368670B (en) | Sensor-free type maximum power tracking control method | |
| Ahmed et al. | Simulation and control of a hybrid PV-wind system | |
| Zhao et al. | Study on Variable Step Sliding-Mode Based MPPT for PV Array | |
| CN203232132U (en) | Look-up table based digital photovoltaic array simulation system | |
| Sundareswaran et al. | Dual input autonomous solar photovoltaic powered motor drive system for industrial applications |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091028 Termination date: 20170429 |