Reliability evaluation of MPPT based interleaved boost converter for PV system


The demand for power supply and depletion of the conventional energy sources are increasing drastically. So to overcome this problem, the best alternative power generation for conventional fossil fuel is Photovoltaic solar cell  based system because of its advantage of pollution free and its availability in abundance with free of cost. In the MPPT based PV system the converters are the most sensitive part. Therefore to provide uninterrupted power supply without compromising the quality of power, reliability evaluation of interleaved boost converter becomes necessary. MATLAB/Simulink is used for the simulation studies and to determine the power losses of various components of the converter which is used in calculating the failure rates and reliability of the interleaved boost converter. Reliability studies of IBC have not been studied much. However there exists few literature in which reliability expression has been developed using Markov technique which is a more complex method as compare to Reliability Block Diagram (RBD). Therefore this paper proposes reliability modeling and reliability evaluation of Interleaved boost converter in MPPT based photo-voltaic system by using simple RBD method.


  1. Maximum Power Point Tracking (MPPT)
  2. Photovoltaic systems
  3. Reliability
  4. Failure rate
  5. Reliability Block diagram(RBD)
  6. Interleaved Boost Converter (IBC)



The modeling of Interleaved boost converter is discussed stepwise along with its simulation results with the help of MATLAB/SIMULINK. The failure rates of each component of IBC and the whole IBC are determined. The RBD model is developed for a conventional boost converter and IBC and those are a series system and a parallel system respectively. With the help of this RBD the overall reliability evaluation and MTTF calculation are done for the IBC used in grid connected PV system. The interleaved boost converter acts as a power converter and MPP tracker as well because of its high reliable nature. The reliability evaluation can be done for the other topologies of these converters which are implemented in various other power generation system.


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