Voltage profile enhancement through identification of suitable locations for citing static var compensators
Ogundare A B, Kareem G N, Oludare N A, Adebeshin A I
This paper presents transmission network expansion for 330 kV, 30-bus Nigerian transmission network. The mathematical models for power flow analysis were formulated using Newton-Ralphson technique to determine the steady state bus voltage magnitude and angle; active and reactive power flows and power losses. Six buses (19, 20, 22, 24, 26 and 27) had their voltage magnitude lower than the statutory limit of 100 ±5%. Static Var Compensator (SVC) was incorporated to the low voltage buses. The modeled equations were modified with SVC and the load flow simulation was repeated. With the SVC, all the bus voltages were within the statutory limit. The active and reactive power loss without the SVC was 219.08 MW and 409.83 MVAr respectively while their values were 185.46 MW and 96.61 MVAr with the SVC. The values of the reactive power given by the SVC at the violated buses were -152.40, -37.0, -93.80, -1.41, -138.05 and -181.78 MVAr respectively. The negative values indicate that SVC would absorbed leading vars or generates negative vars into the network. The percentage improvement in reactive power (76.43%) using the SVC was more than that of active power (15.35%). The simulation also converged faster from 9th to 8th iteration with the SVC.
Ogundare A B, Kareem G N, Oludare N A, Adebeshin A I. Voltage profile enhancement through identification of suitable locations for citing static var compensators. International Journal of Advanced Engineering and Technology, Volume 6, Issue 2, 2022, Pages 16-20