Maximum power point tracking controller for three-phase photovoltaic power generation system

A photovoltaic power generation system and maximum power point technology, applied in the field of voltage conversion control and photovoltaic power generation current, to achieve the effects of improving steady-state tracking accuracy, speeding up response speed, and reducing power oscillations

Inactive Publication Date: 2012-09-19
HOHAI UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to improve the utilization efficiency of photovoltaic array photoelectric conversion

Method used

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  • Maximum power point tracking controller for three-phase photovoltaic power generation system
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  • Maximum power point tracking controller for three-phase photovoltaic power generation system

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Embodiment Construction

[0026] figure 1 It is the schematic diagram of the general circuit of the controller of the three-phase photovoltaic power generation system of the present invention. The controller of the present invention is mainly composed of BOOST type DC / DC conversion circuit 1, DC / AC inverter circuit 2, control circuit and power supply circuit; wherein BOOST type DC The signal acquisition terminal of the / DC conversion circuit 1 is connected to the photovoltaic array, and its output terminal is connected to the DC terminal of the DC / AC inverter circuit 2, and the AC terminal of the DC / AC inverter circuit 2 is connected to the load; the BOOST type DC / DC conversion The circuit is used to collect the real-time current and voltage signals of the photovoltaic array, and transmit the signals to the control circuit; the control circuit uses the variable structure fuzzy The control algorithm and the SVPWM control algorithm send a driving pulse signal for the three-phase inverter circuit; the thr...

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Abstract

The invention discloses a maximum power point tracking controller for a three-phase photovoltaic power generation system. The controller mainly comprises a BOOST type DC/DC converting circuit, a three-phase inversion circuit, a control circuit and a power circuit. The technical scheme includes that a variable-structure fuzzy control method is applied to MPPT (maximum power point tracking) of photovoltaic power generation so that tracking precision can be improved, and the method can effectively realize maximum power point tracking when illumination and temperature vary. By means of variable-structure fuzzy control, different fuzzy sub-controllers are designed according to different working conditions, the discourse domain range, control rules, parameters and the like of the fuzzy sub-controllers are different, the fuzzy sub-controllers form a variable-structure fuzzy controller, and accordingly one fuzzy sub-controller constantly enables the system to achieve the optimal control quality in system running.

Description

technical field [0001] The invention relates to a maximum power point tracking three-phase photovoltaic power generation system controller, which belongs to the field of photovoltaic power generation current and voltage conversion control. Background technique [0002] The energy crisis in today's society coexists with environmental pollution, and it is becoming more and more serious. Countries all over the world are actively looking for new energy to ensure the sustainable development of society, economy, and environment. Solar energy is clean, pollution-free, inexhaustible, and useful Inexhaustible and other advantages have attracted people's attention. [0003] According to the forecast of the European Joint Research Center (JRC), in the future world energy structure, solar photovoltaic power generation occupies an important position and will become the main body of future world energy. However, there is still a large gap between my country's photovoltaic industry and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/5395G05F1/67H02M1/12
CPCY02E10/58Y02E10/56
Inventor 李斌袁越李畸勇赵扶剑
Owner HOHAI UNIV
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