IEEE 30 Bus- with PV case1&2

PV penetration
15 MW PV simulation in PSCAD:
Benefits & quiz :
Losses reduction across OHL?
How voltage profile enhanced ?
How is the PV respond to earth fault in OHL?
What is minimum grid voltage limit accepted to operate PV ?Voltage ride through?
What is behavior of PV ,when grid CB trip? Still supply local load or not?
To answer above quiz , simulation required (PSCAD).
PV integration at 33KV MV level In inter-connected grid consist of slack bus (with high inertia)
and other sources according to IEEE-30-Bus.
PV solar array & Inverter:
consist of 250KW with 60 string ( 15 MW for case 1,2 & 10 MW with 40 string of case 3,4)
Invertor control using PQ method ( with ABC to DQ transformation and PLL for IGBT
switching with carrier frequency about 5KHZ).
Inverter voltage 1 KV , then stepped up to 33KV using Dyn transformer).
The whole system connected with 33KV OHL 185mm2 single circuit with length 10KM.
PV integrated at Bus11 , also there is 3.5MVAR capacitor bank over this bus.
Case-1 as shown in photos ( with PSCAD simulation):
15MW PV integrated in Bus11 (Bus11 contain 15MW,7.2MVAR Load)
with PV the losses reduction across line is 500KW
Voltage profile enhanced from 31.2KV to 32.5KV.
Also reduction in MVAR loss across line (700 KVAR).
Case-2 : same as case-1 without capacitor bank 3.5MVAR
The PV cant be integrated because of voltage out of limit (30.6KV).