A maximum power point tracking system and method under partial shadow of photovoltaic array
A maximum power point and photovoltaic array technology, applied in photovoltaic power generation, control/regulation systems, instruments, etc., can solve problems such as being unable to track and falling into local extreme points
Inactive Publication Date: 2017-07-28
ANHUI UNIV OF SCI & TECH
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The present invention provides a maximum power point tracking system and method under the local shadow of a photovoltaic array, which solves the problem that the traditional MPPT control system in the prior art often falls into a local extreme point and cannot be tracked when tracking the maximum power point. The specific technical solution as follows:
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0028] The schematic diagram of the global maximum power point tracking system of the photovoltaic array in the case of partial shading is shown in figure 1 As shown, when performing global maximum power point tracking, K1 (first switch) is turned off to isolate the photovoltaic array from the subsequent DC-DC module, and K2 (second switch) is closed to connect the photovoltaic array to the tracking circuit. Find the voltage U of the global maximum power point of the photovoltaic array at this time by tracing the circuit MPP and current I MPP , at this time, K2 is disconnected and K1 is closed; the voltage and current values are sent to the controller, and the controller converts the voltage value U MPP As given by the PI regulator, the output voltage of the photovoltaic array is kept at the voltage value U through the closed-loop regulation of the PI regulator. MPP On, so that the photovoltaic array can work stably at the maximum power point.
[0029] The principle of th...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a maximum power point tracking technology of a photovoltaic array and in particular relates to a system and a method for tracking a maximum power point of a photovoltaic array under partial shadow. The maximum power point tracking system comprises the photovoltaic array, a first switch, a DC / DC (Direct Current / Direct Current) module and a load which are connected in sequence, and further comprises a tracking circuit and a controller, wherein the tracking circuit is connected with the photovoltaic array through a second switch; the tracking circuit is connected with the controller; the controller is connected with the DC / DC module. Compared with a traditional technology, the system and method for tracking the maximum power point under the partial shadow of the photovoltaic array, provided by the invention, have the advantages of simple method, rapid searching speed and high precision, and are suitable for tracking the maximum power point of the photovoltaic array under the partial shadow condition and the like.
Description
technical field [0001] The invention relates to a photovoltaic array maximum power point tracking technology, in particular to a maximum power point tracking system and method under partial shadow of a photovoltaic array. Background technique [0002] Photovoltaic array (PV Array), also known as photovoltaic array, is a DC power generation unit composed of several photovoltaic modules or photovoltaic panels mechanically and electrically assembled together in a certain way and with a fixed support structure. To charge the battery, the output voltage of the photovoltaic array panel must be higher than the current voltage of the battery. If the voltage of the photovoltaic array panel is lower than the voltage of the battery, the output current will be close to 0. The traditional solar charge and discharge controller is a bit like a manual gearbox. When the engine speed increases, if the gear position of the gearbox does not increase accordingly, the speed of the vehicle will in...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/67
CPCG05F1/67Y02E10/56
Inventor 周小杰杨岸李敬兆
Owner ANHUI UNIV OF SCI & TECH