IMPROVED ENERGY EFFICIENCY USING FACTS-DEVICE TECHNIQUE- A CASE STUDY OF OGUI-ENUGU POWER DISTRIBUTION NETWORK.

ABSTRACT

In this thesis, the objective is to determine the steady state operating condition of thirteen bus Ogui-Enugu Radial power distribution network. The steady-state was determined by finding out, for a given set of loading conditions, the flow of active and reactive powers throughout the network, the voltage magnitudes and phase angles at all buses of the network. This was achieved using Newton-Raphson power flow algorithm written in MATLAB environment. A critical analysis of the network results revealed that buses 11, 12 and 13 far away from the slack generator have voltage magnitudes not within the acceptable voltage limits of ±6% of the declared voltage. Against this background, a power electronic FACTS-Device currently used in the electricity supply industry for the purpose of voltage regulation, active and reactive power flow control was installed at bus 13 to determine how FACTS controller narrows the gap between the electromechanically controlled and the power electronic controlled power system mode of operation. The result of the STATCOM Newton-Raphson power flow algorithm written in MATLAB environment shows that voltage magnitudes at buses 11, 12 and 13 fell back within the acceptable limit of ±6% of declared voltage and eminently increased real power flow in those buses but conversely reduced the reactive power flow in those buses specified. The result of the study gives an insight into the new opportunities available in power semi-conductor control of power system parameters and enhancement of power quality using FACTS- DEVICES.