Central Inverter Ohmic Losses

[Carlos Romera]

Good morning,

I am simulating a PV plant with central inverter type SKID with MV tranformer and suddenly I have a question about ohmic losses.  Taking into account that the central inverter system has a DC part up to the central inverter type Skid and comes out in MV, in the AC losses when taking into account the ohmic losses should I put 0?

 

On the other hand, in the same plant, for reasons of adaptation of the tracker to the ground. I have cases in which there are trackers that I have started with a cardan and I find that I have to simulate 1 string and a half in a tracker and another string and a half in another. When defining the partition, it does not allow me to put 1.5 in the axis (X), how could I simulate this?

 

Thank you everyone for your time and help!

Best regards!

[dtarin]

The first section for AC loss should be zero. The MV AC losses are further below, they will not be zero. 

There is no good way to model it. Modeling with 1 overestimates loss, modeling with 2 underestimates loss. For an in-between figure you can simulate with 1 partition and again with 2, average those and calculate energy delta from your base case, then apply that delta in a new simulation in MQF. For example, base case A is 1 partition, case B is 2 partitions. The two partitions will likely have higher energy. Then calculate (EArrMpp_B - EArrMpp_A) / (2 * EArrMpp_A) and include this result in MQF in a new simulation for case A. 

Edited March 21 by dtarin

[Carlos Romera]

Good morning,

Thank you very much for your answer, I will try what you have told me about the two models and calculate the average.