Multiple VSC power flow problem
I am trying to integrate a PV system and a battery system along with the grid. I have tested them separately with the grid and both of them working fine but when I have connected both of them together with the grid they start showing very abnormal behaviour like there is backfeeding in PV system, instead of being charged the battery sometimes is getting charged and sometimes discharged etc. I have also noticed that at different points of the system the voltages do not remain fixed. It fluctuates a lot. As you know the VSC block in PSCAD doesn't have any mean to set the grid side voltage.
Can anyone help in this issue? Knowing why this happens is also very important to me.
Open Nov 14, 2017 - 09:27 AM
VSC block random power flow, VSC block random power flow