VOLTAGE STABILITY AND CONTROL OF NEW HAVEN 132/33KV POWER FEEDER USING DISTRIBUTED STATCOM

Voltage stability issues are a major concern in Nigeria due to many system failures and surges in electrical installations around Enugu. Owing to the fact that D-STATCOM temporarily increases the nominal current (inductive or capacitive) of power system network, its application for voltage stability and control in power system network will proffer solution to the voltage network challenges to the network under study. The main aim of this work is to improve the voltage stability of the New-Haven 132/33kV network using distributed STATCOM. To achieve this, the case study was characterized to determine the voltage stability level of the network. The characterization was done using continuation power flow and voltage stability indices. Simulink model of the test network was then developed in PSAT platform. D-STATCOM is then configured and introduced at the weakest buses to improve the stability of the case study. The transformer and feeder data used for this work was from the New Haven 33kV load flow summary for the month of June, 2022. By connecting D-STATCOM at New NNPC bus as a point of common couple (PCC), the voltage magnitude of all the buses moved from 0.474pu to the IEEE approved range of 0.95-1.05pu