Photovoltaic inverter control system and method being developed based on model design
A photovoltaic inverter and control system technology, applied in photovoltaic power generation, AC network circuits, electrical components, etc., can solve problems such as incorrect DSP register configuration, costly code modification and debugging, and manual algorithm code errors, etc., to achieve Realize seamless connection between digital control simulation and code writing, good anti-interference ability, and reduce workload
Inactive Publication Date: 2017-06-30
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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It will take a lot of time to rewrite the simulation model into DSP code written in C language. At the same time, it may be caused by manual algorithm code errors, incorrect DSP register configuration, data accuracy and quantization errors when the algorithm is implemented using DSP, which is different from MATLAB. The simulation algorithm cannot be reproduced in DSP, which makes developers spend a lot of energy on code modification and debugging, which affects the development speed
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[0049] The present invention will be further described in detail below with reference to the drawings and embodiments.
[0050] Such as figure 1 As shown, the photovoltaic inverter includes a DC link 1, a power switch tube 2, a filter 3, a grid-connected switch 4, and a control system 5.
[0051] The DC link 1 is connected to the photovoltaic array, and the output of the photovoltaic array is connected to the DC-DC boost circuit, which is controlled by the maximum power point tracking (MPPT) controller, so that the photovoltaic system can track the maximum power point and output a suitable DC voltage under different lighting conditions. Value.
[0052] The power switch tube 2 is taken by the IGBT, and completes the power conversion function from DC to AC.
[0053] The filter 3 adopts an LC filtering method to eliminate mid- and high-frequency ripple in the AC output.
[0054] The grid-connected switch 4 controls whether the photovoltaic control system is connected to the public grid, ...
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The invention relates to a photovoltaic inverter control system and method being developed based on a model design. According to the invention, codes of controllers achieving the fuzzy control strategy are generated by means of the model design method, and the photovoltaic inverter control system is exploited. The fuzzy controllers guarantee the stability and reliability of the photovoltaic output voltage / current by adjusting the direct current voltage and the system current. With respect to the photovoltaic inverter control system based on the model design, a development method that an MATLAB / Simulink and a DSP are combined is employed, steps from the generation of the simulation model to the automatic generation of DSP (digital signal processor ) control codes of the control system are completed, the problems that in a conventional development mode, the system algorithm design is disjointed with hardware, the controller simulation parameters cannot be used in actual hardware and need to be adjusted blindly are effectively solved, the fact that digital control simulation is in seamless connection with code compiling is achieved, and the development period of the photovoltaic inverter control system is effectively shortened.
Description
Technical field [0001] The invention relates to the field of power electronics technology, especially the field of photovoltaic inverter development and research, in particular to a photovoltaic inverter control system and method based on model design and development. Background technique [0002] In recent years, due to the global energy shortage and environmental pollution, photovoltaic power generation has attracted the attention of governments. The photovoltaic power generation system is mainly composed of photovoltaic components, photovoltaic inverters, and electricity metering and power distribution systems. Photovoltaic components use the photoelectric effect to convert light energy into direct current electricity, which must be converted into alternating current through a conversion device-photovoltaic inverter to connect photovoltaic power generation to the grid and the corresponding load. As the energy conversion interface device between the photovoltaic array and the ...
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Login to View More IPC IPC(8): H02J3/38
CPCH02J3/383H02J2203/20Y02E10/56
Inventor 卞晶臧传治曾鹏于海斌徐石明赵有健
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI