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Photovoltaic grid-connected system for restraining chaos based on DSP (Digital Signal Processor) as well as working method thereof

A technology of grid-connected power generation and photovoltaic cells, applied in photovoltaic power generation, single-network parallel feeding arrangement, etc., can solve problems such as hidden dangers and chaos in the operation of photovoltaic systems

Active Publication Date: 2014-11-26
TIANDAQIUSHI ELECTRIC POWER HIGH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many strong nonlinear components inside the photovoltaic system, and chaos is prone to occur in the DC / DC and DC-AC links. When the photovoltaic system is connected to the large power grid, the chaos existing in the photovoltaic system will bury the operation of the entire system. Hidden danger

Method used

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  • Photovoltaic grid-connected system for restraining chaos based on DSP (Digital Signal Processor) as well as working method thereof
  • Photovoltaic grid-connected system for restraining chaos based on DSP (Digital Signal Processor) as well as working method thereof
  • Photovoltaic grid-connected system for restraining chaos based on DSP (Digital Signal Processor) as well as working method thereof

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Embodiment

[0034] Embodiment: a kind of photovoltaic grid-connected power generation system based on DSP suppressing chaos (see figure 1 ), characterized in that it includes a photovoltaic cell array, a DC / DC conversion unit, a DC / AC conversion unit, an output LC filter unit, a DC voltage and current detection unit, a drive circuit unit, a sampling circuit unit, a grid-connected current detection unit, Chaos controller unit, chaos detection unit, power grid voltage detection unit, DSP control unit and power grid; Wherein, the input terminal of described DC / DC direct current conversion unit collects the signal of photovoltaic battery array and the drive signal that drive circuit sends, and its output terminal Connect the input terminal of the DC / AC AC conversion unit; the input terminal of the DC / AC AC conversion unit also receives the drive signal sent by the drive circuit, and its output terminal is connected to the input terminal of the output LC filter unit; the output of the LC filte...

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Abstract

The invention provides a photovoltaic grid-connected system for restraining chaos based on a DSP (Digital Signal Processor) as well as a working method thereof. The photovoltaic grid-connected system is characterized by comprising a photovoltaic battery array, a DC (Direct-Current) / DC conversion unit, a DC / AC (Alternating-Current) conversion unit, an output LC filtering unit, a direct-current voltage and current detecting unit, a driving circuit unit, a sampling circuit unit, a grid-connected current detecting unit, a chaos controller unit, a chaos detecting unit, a grid voltage detecting unit, a DSP control unit and a power grid. The working method comprises signal sampling, calculation, state judgment, disturbance supplement, and grid connection. The photovoltaic grid-connected system has the following advantages: 1, the quality of electric energy is improved; 2, the reliability of the system is improved; and 3, the photovoltaic grid-connected system has simple structure and reliable operation.

Description

(1) Technical field: [0001] The invention belongs to the cross-technical field of electric power electronic technology and new energy photovoltaic power generation, in particular a DSP-based photovoltaic grid-connected power generation system for suppressing chaos and a working method thereof. (two) background technology: [0002] Photovoltaic grid-connected power generation, as one of the important directions of solar energy technology utilization, has been developing rapidly today. The core of photovoltaic grid-connected system lies in the inverter. The efficiency of the entire system and the quality of output power are closely related to the conversion efficiency of the inverter, which can only be achieved by improving the topology of the main circuit of the inverter and the control strategy of the switching devices. According to the number of power stages, the inverters of photovoltaic grid-connected power generation systems can be divided into single-stage structure and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38
CPCY02E10/563Y02E10/56
Inventor 周雪松沈雪波马幼捷
Owner TIANDAQIUSHI ELECTRIC POWER HIGH TECH CO LTD