Offline MPPT method works by disconnecting the PV panel from the system in order to measure either the short circuit current or open circuit voltage (also referred as offline parameters). During the measurement instant, the PV panel is isolated from the rest of the system, hence it is called as offline MPPT. It has two types
Understanding simulation tools is essential for the engineers nowadays. It is because they provide the first platform to test the hypothesis and ideas. Several simulation software are available in market that can be used to simulate the circuits. Recently, while i was arranging my documents i came across a wonderful article on the simulation of power electronic converters using matlab-simulink, and in this blog post i would like to present my thoughts about this work. So here is what my review is
Problem
While simulating a grid connected PV system using co-simulation among PSIM and SIMULINK i was getting error. The error stated thatAlgebraic state in algebraic loop containing 'SCMPPT_sensorless_v4_buckboost_ok/Product3' computed at time 0.0005 is Inf or NaN. There may be a singularity in the solution. If the model is correct, try reducing the step size (either by reducing the fixed step size or by tightening the error tolerances).
Solar PV modules are typically connected to an dc-dc converter for ensuring the operation at maximum available power. While the research work has shown us the possibilities of using different kinds of dc-dc converters, following three basic topologies are still widely used.
Reading research papers is must for carrying out updated research that too in right direction. When I was stuck for almost two months on the design issues related to grid-connected PV systems I worked hard to get my issues resolved. While reading and reading and reading I read thesis reports, research papers and a lot of online articles. However, the following papers helped me a lot in expanding the breadth of my knowledge base.
Problem
I encountered a strange problem while co-simulation of a PV grid connected inverter. The problem was that for simulation time less than 2 sec, the simulation results were ok. For time more than 2.5 sec the results were bad. See these figures.