Solar photovoltaic parallel inverter control system based on LCL filtering

A solar photovoltaic and control system technology, applied in photovoltaic power generation, harmonic reduction devices, single-grid parallel feeding arrangements, etc., can solve the problems of poor stability, low reliability and poor performance of photovoltaic power generation systems, and achieve DC The effect of voltage reduction, high technology content and large added value

Inactive Publication Date: 2009-07-29
CHANGZHOU RUSN NEW ENERGY
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of poor stability, poor performance, low efficiency and low reliability of the existing photovoltaic power generation system, and propose a method using an LCL filter with good stability, strong performance, high efficiency and high reliability. Large solar photovoltaic grid-connected inverter control system based on LCL filter

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  • Solar photovoltaic parallel inverter control system based on LCL filtering
  • Solar photovoltaic parallel inverter control system based on LCL filtering

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0015] Such as figure 1 As shown, a solar photovoltaic grid-connected inverter control system based on LCL filtering, which includes a photovoltaic array P1, an electromagnetic interference filter (EMI filter), a power module, an LCL filter, an isolation transformer TB1, a sampling circuit, and a filtering circuit And the controller (TI's high-speed DSP controller can be used, the model can be TMS320LF2407), the photovoltaic array absorbs solar energy and converts light energy into electrical energy, the output of the photovoltaic array is connected to the corresponding input of the EMI filter, and the EMI The output terminal of the filter is connected to the corresponding input terminal of the power module, the output terminal of the power module is connected to the signal input terminal of the LCL filter, the output terminal of the LCL filter is conne...

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Abstract

A solar energy grid-connected inverter control system based on LCL filtration comprises a photovoltaic array, an electromagnetic interference filter, namely an EMI filter, a power module, an LCL filter, an isolation transformator TB1, a sample circuit, a filter circuit and a controller which includes a maximum capacity tracking MPPT unit. MPPT adopts an intelligent algorithm based on a hybrid algorithm of a simulated annealing method and a genetic algorithm. The hybrid optimization algorithm takes the operation process of the genetic algorithm as the main process and also combines a simulated annealing mechanism that is used for further adjusting optimized instruction data. The control system has the advantages of good stability, strong performance and high efficiency and reliability.

Description

technical field [0001] The invention relates to the field of clean energy grid-connected power generation, in particular to an inverter for solar grid-connected power generation, specifically a solar photovoltaic grid-connected inverter control system based on LCL filtering. Background technique [0002] With the massive emission of greenhouse gases, the increasing greenhouse effect, the deteriorating environment of the earth we are too lazy to survive, coupled with the energy crisis, it is imminent to use clean energy to replace traditional energy. In recent years, with the advancement of photovoltaic cell technology, the efficiency of solar photovoltaic power generation has been continuously improved and the cost has been continuously reduced. Therefore, the use of solar photovoltaic power generation to replace traditional energy power generation has become the first choice for many countries. my country is rich in solar energy resources, and two-thirds of the country's lan...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/01
CPCY02E10/563Y02E10/56Y02E40/40
Inventor 蒲延洲徐成
Owner CHANGZHOU RUSN NEW ENERGY
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