CN202838078U - Solar energy illumination maximum power tracing device - Google Patents
Solar energy illumination maximum power tracing device Download PDFInfo
- Publication number
- CN202838078U CN202838078U CN 201220514205 CN201220514205U CN202838078U CN 202838078 U CN202838078 U CN 202838078U CN 201220514205 CN201220514205 CN 201220514205 CN 201220514205 U CN201220514205 U CN 201220514205U CN 202838078 U CN202838078 U CN 202838078U
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- variable step
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Abstract
The utility model relates to a solar energy illumination maximum power tracing device which comprises a state inspection sub-device, a hysteresis comparison sub-device, a variable step sub-device, a controller sub-device and a tracing sub-device, wherein the state inspection sub-device is connected with a plurality of sensors, and the variable step sub-device is connected with the hysteresis comparison sub-device. The hysteresis comparison sub-device keeps working point voltage unchanged when solar energy power fluctuates within a preset range and changes the working point voltage according to a preset law when fluctuating quantity of the solar energy power exceeds the preset range, wherein the preset law is set in the variable step sub-device. The controller sub-device is connected with the tracing sub-device, the hysteresis comparison sub-device, the variable step sub-device and the state inspection sub-device. Due to the arrangement of the hysteresis comparison sub-device and the variable step sub-device, the oscillation phenomenon of a disturbance observation method can be effectively restrained, and a working point can be set within the maximum power point range fast and accurately.
Description
Technical field
The utility model relates to a kind of power tracking device, refers more particularly to a kind of solar illuminating maximum power tracking device of using for photovoltaic generating system.
Background technology
In the time of near the solar illuminating generating working point arrival maximum power point, perturbation scheme for fixed step size, the situation that the working point strides across maximum power point can appear, but after the change perturbation direction, the difference of quiescent potential and maximum power point voltage is still less than step-length, can't reach maximum power point, this because the certain working point that causes of disturbance step-length in the reciprocating situation in maximum power point both sides, is exactly the oscillatory occurences of disturbance observation method.When external environment changed, the characteristics of output power curve of photovoltaic cell also changed, and working point sequence in a period of time can occur and be positioned at situation on the different Ppv-Upv family curves.Continue to use the criterion that be directed to fixed characteristic curve for the working point on the different Ppv-Upv family curves this moment, the perturbation direction situation opposite with the real power variation tendency will occur, is exactly the misjudgment phenomenon of disturbance observation method.
Summary of the invention
Technical matters to be solved by this invention is, a kind of solar illuminating maximum power tracking device that fast and accurately working point is set in the maximum power point zone is provided.
For solving the problems of the technologies described above, the present invention is by the following technical solutions: a kind of solar illuminating maximum power tracking device, it is characterized in that including the sub-device of state-detection, the more sub-device of stagnant chain rate, the sub-device of variable step, the sub-device of controller and the sub-device of tracking, the sub-device of state-detection is connected with a plurality of sensors, the sub-device of variable step is connected with the more sub-device of stagnant chain rate, when the more sub-device of described stagnant chain rate realizes that fluctuation appears in solar power in set scope, keep quiescent potential to remain unchanged, when the solar power undulate quantity exceeds in the set scope, change quiescent potential according to setting rule, set rule and be arranged in the sub-device of described variable step, the sub-device of controller and the sub-device of tracking, the more sub-device of stagnant chain rate, the sub-device of variable step is connected with the sub-device of state-detection.
As a kind of improvement, the sub-device of controller is provided with the PI controller, and described PI controller DC current gain is 20-40dB, and described PI controller turnover phase place is 10-50rad.
The utility model is provided with the effectively oscillatory occurences of disturbance suppression observation method of the more sub-device of chain rate, the sub-device of variable step that stagnates, and fast and accurately the working point is set in the maximum power point zone.
Description of drawings
Fig. 1 is the structured flowchart of the utility model solar illuminating maximum power tracking device.
Embodiment
As shown in Figure 1, a kind of embodiment of solar illuminating maximum power tracking device, include the sub-device 5 of state-detection, the more sub-device 2 of stagnant chain rate, the sub-device 3 of variable step, the sub-device 1 of controller and the sub-device 4 of tracking, the sub-device 5 of state-detection is connected with a plurality of sensors, the sub-device 3 of variable step is connected with the more sub-device 2 of stagnant chain rate, when the more sub-device 2 of described stagnant chain rate realizes that fluctuation appears in solar power in set scope, keep quiescent potential to remain unchanged, when the solar power undulate quantity exceeds in the set scope, change quiescent potential according to setting rule, set rule and be arranged in the sub-device 3 of described variable step the device 5 of state-detection, follow the tracks of sub-device 4, the more sub-device 2 of stagnant chain rate, the sub-device 3 of variable step is connected with the sub-device 1 of controller.When fluctuation appearred in power in set stagnant ring, the quiescent potential of photovoltaic cell remained unchanged, and only had when the undulate quantity of power exceeds set stagnant ring, just changed quiescent potential according to certain rule.As seen the introducing of the more sub-device 2 of chain rate, the effectively oscillatory occurences of disturbance suppression observation method stagnate.In fact a kind of dynamic oscillatory process in the time of can regarding erroneous judgement as external environment condition and change, so the method also can overcome the misjudgment phenomenon of disturbance observation method.The more sub-device 2 of chain rate can be avoided vibration and misjudgment phenomenon largely although stagnate, if but step-length is excessive, the working point may be parked in from the zone of maximum power point away from, if step-length is too small, when a new round begins to search for, the working point can be in away from the maximum power point zone for a long time search, so the contradiction of speed and precision still exists, the more sub-device 2 of stagnant chain rate matches with the sub-device 3 of variable step just can solve this contradiction.
As a kind of improved embodiment, the sub-device 1 of controller is provided with the PI controller, and PI controller DC current gain is 20-40dB, and PI controller turnover phase place is 10-50rad.Because control object is difficult to set up, and can select simple PI controller, it is less to reach steady-state error, the technique effect that dynamic response is fast.
Claims (2)
1. solar illuminating maximum power tracking device, it is characterized in that including the sub-device of state-detection (5), the more sub-device of stagnant chain rate (2), the sub-device of variable step (3), the sub-device of controller (1) and tracking sub-device (4), the sub-device of state-detection (5) is connected with a plurality of sensors, the sub-device of variable step (3) is connected with the more sub-device of stagnant chain rate (2), when the more sub-device of described stagnant chain rate realizes that fluctuation appears in solar power in set scope, keep quiescent potential to remain unchanged, when the solar power undulate quantity exceeds in the set scope, change quiescent potential according to setting rule, set rule and be arranged in the sub-device of described variable step (3) the sub-device of state-detection (5), follow the tracks of sub-device (4), the more sub-device of stagnant chain rate (2), the sub-device of variable step (3) is connected with the sub-device of controller (1).
2. a kind of solar illuminating maximum power tracking device according to claim 1 (4) is characterized in that the sub-device of controller (1) is provided with the PI controller, and described PI controller DC current gain is 20-40dB, and described PI controller turnover phase place is 10-50rad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220514205 CN202838078U (en) | 2012-10-09 | 2012-10-09 | Solar energy illumination maximum power tracing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220514205 CN202838078U (en) | 2012-10-09 | 2012-10-09 | Solar energy illumination maximum power tracing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202838078U true CN202838078U (en) | 2013-03-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220514205 Expired - Fee Related CN202838078U (en) | 2012-10-09 | 2012-10-09 | Solar energy illumination maximum power tracing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202838078U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103412609A (en) * | 2013-08-21 | 2013-11-27 | 西安龙腾新能源科技发展有限公司 | Output power control method of photovoltaic grid-connected inverter |
| CN110174920A (en) * | 2019-06-10 | 2019-08-27 | 上海空间电源研究所 | A kind of solar battery array variable step MPPT control circuit and control method |
-
2012
- 2012-10-09 CN CN 201220514205 patent/CN202838078U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103412609A (en) * | 2013-08-21 | 2013-11-27 | 西安龙腾新能源科技发展有限公司 | Output power control method of photovoltaic grid-connected inverter |
| CN103412609B (en) * | 2013-08-21 | 2016-02-10 | 西安龙腾新能源科技发展有限公司 | The output power control method of photovoltaic combining inverter |
| CN110174920A (en) * | 2019-06-10 | 2019-08-27 | 上海空间电源研究所 | A kind of solar battery array variable step MPPT control circuit and control method |
| CN110174920B (en) * | 2019-06-10 | 2021-08-10 | 上海空间电源研究所 | Variable-step MPPT control circuit and control method for solar cell array |
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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: 20130327 Termination date: 20171009 |
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| CF01 | Termination of patent right due to non-payment of annual fee |