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Improved variable step size perturbation method MPPT control device and method and application system thereof

A control device and technology of variable step size, applied in control/regulation systems, output power conversion devices, circuit devices, etc., can solve the problem that the steady-state performance and dynamic performance of the fixed-step algorithm cannot be balanced, the convergence speed is slow, and the power consumption Large loss and other problems, to achieve the effect of smooth and fast tracking process, good stability and accuracy

Active Publication Date: 2018-07-31
温州拓日工业设计有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to provide an improved variable step algorithm to solve the problems in the prior art that the steady-state performance and dynamic performance of the fixed-step algorithm cannot be balanced, the convergence speed of the traditional variable-step algorithm is slow, and the power loss is large. Long disturbance method MPPT control device and method

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[0015] The present invention provides an improved MPPT control device, method and application system of the variable step size disturbance method. In order to make the purpose, technical solution and advantages of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples . It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0016] Such as figure 1 As shown, an improved variable step size MPPT control device and application system, including PV array, voltage conversion unit, voltage detection device, current detection device, MPPT control module based on single-chip microcomputer, using processing circuit, duty cycle control circuit, Storage battery and load, the voltage conversion unit includes capacitor C1, inductor L1, switch tube Q1, diode D1 and capacitor C2; both e...

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Abstract

The invention relates to the technical field of solar cell maximum power point tracking control, and particularly relates to an improved variable step size perturbation method MPPT control device andmethod and an application system thereof. The variable step size MPPT control device comprises a PV array, a voltage conversion unit, a voltage detection device, a current detection device, an MPPT control module based on a single-chip microcomputer, a use processing circuit, a duty ratio control circuit, a storage battery and a load. The invention also provides the variable step size MPPT controlmethod. The maximum power point can be tracked within a short period of time, the stability and the accuracy are great and the tracking process is smooth and rapid.

Description

technical field [0001] The invention relates to the technical field of maximum power point tracking control of solar cells, in particular to an improved MPPT control device, method and application system of variable step size perturbation method. Background technique [0002] Solar energy, as a new type of green energy, can solve the energy crisis caused by the exhaustion of conventional energy sources, and has attracted widespread attention at home and abroad. Photovoltaic power generation is one of the main forms of utilizing solar energy at present. The output characteristics of photovoltaic cells have strong nonlinear characteristics. Its output power is not only related to the internal characteristics of photovoltaic cells, but also affected by external environmental conditions (light, temperature). The maximum power point tracking technology (Maximum power point track, MPPT ) can effectively improve the energy conversion efficiency of the photovoltaic system. For the...

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Application Information

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IPC IPC(8): H02M3/157G05F1/67H02S40/30H02J7/35H02J7/00
CPCG05F1/67H02J7/00H02J7/35H02M3/157H02S40/30H02J2207/20Y02E10/56
Inventor 何金昌王晓阳约瑟夫克斯
Owner 温州拓日工业设计有限公司
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