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Design and development of MPPT algorithm for high efficient DC-DC converter for solar energy system connected to grid

机译:高效DC-DC转换器MPPT算法的设计与开发太阳能系统连接到网格

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Because of combustion of fossil fuels global warming caused by environmental problems, the raising prices of crude oils and natural gases. They promote continuous effort to improve energy system and its efficiency. There is a need to search for abundant and clean energy sources due to the depleted and increasing prices of oil. Solar energy acts as an alternative renewable energy source. Photovoltaic cells are used as renewable energy system. Photovoltaic (PV) cells can be used to generate dc voltages and given to DC-DC converter. DC-DC converter used is Buck boost type of converter. The converter output is given to battery to inverter and load. Buck boost converter gives constant output which will controlled by PWM controller and feedback control system. Feedback control system has compensation network with different types and parameters. Designing of converter gives constant output. A maximum power point tracking (MPPT) algorithm technique is needed to track the peak power to maximize the produced energy. The maximum power point in the power voltage graph is identified by an algorithm called as incremental conductance method. This algorithm will identify the suitable duty cycle ratio in which buck boost converter should operate to maximum point. The MPPT algorithm is vital in increasing the efficiency of the system. This output is given to battery though the H bridge inverter circuit. The ac output voltage is directly fed to low voltage grid though the PLL circuit. The control of PWM for converter, inverter, MPPT algorithm and PLL is controlled by using MICROCHIP dsPIC30F4011 DSP processor. The total experimentation is carried out and results of converter, inverter, grid control and MPPT characteristics are analyzed.
机译:由于化石燃料燃烧全球变暖因环境问题引起,提高原油和天然气价格。他们促进持续努力改善能源系统及其效率。由于石油价格耗尽和增加,需要寻求丰富和清洁的能源。太阳能充当替代可再生能源。光伏电池用作可再生能源系统。光伏(PV)电池可用于产生直流电压并给予DC-DC转换器。 DC-DC转换器使用的是降压升压式转换器。转换器输出可给电池到逆变器和负载。降压升压转换器可提供由PWM控制器和反馈控制系统控制的恒定输出。反馈控制系统具有具有不同类型和参数的补偿网络。转换器的设计提供恒定的输出。需要最大功率点跟踪(MPPT)算法技术来跟踪峰值功率以最大化产生的能量。电源电压图中的最大功率点由称为增量电导方法的算法识别。该算法将识别电压升压转换器应运行到最大点的合适占空比比。 MPPT算法对于提高系统效率至关重要。虽然H桥式逆变器电路,但该输出给出了电池。虽然PLL电路,AC输出电压直接送到低电压网格。通过使用Microchip DSPIC30F4011 DSP处理器控制用于转换器,逆变器,MPPT算法和PLL的PWM的控制。进行了总实验,分析了转换器,逆变器,电网控制和MPPT特性的结果。

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