POWER NETWORK LOADING LIMIT DETERMINATION USING NOSE POINT CONCEPT

The objective of the study is to provide a comprehensive load flow analysis to
determine the transformer tap setting under different Cogeneration plant operating
condition. The analysis covers the PETRONAS Penapisan (Melaka) Cogeneration
plant which supply power to the existing PETRONAS Second Refinery 1 and
PETRONAS Second Refinery 2 loads. In order to conduct the analysis, a simulation
software called Power System Analysis Toolbox (P.S.A.T) is used to determine the
voltage, real power and reactive power to be transfer at each bus during the load flow
analysis. The maximum loading limit of the power network is determined from the
point of voltage collapse of P-V curve and Q-V curve. In this project, the baseline
parameters values are first defined and entered as the data input, then the load flow
analysis is done to identify the weakest bus. Variation of a real power and reactive
power on the weakest bus and repetition of load flow analysis with the change of
loads and transformer tap setting is conducted in order to plot the P-V and Q-V curve
and to determine the maximum loading limit.