Tracing Synchronous Generator's Capability Curve for Better Visualization of Its Operating Condition

Abstract

The operation of both new and existing synchronous machine power plants must take into account entirely new requirements as a result of the quicker shift to renewable energy sources. Capability diagrams are essential for assessing synchronous machines' efficiency and operating ranFtge under various loading conditions. Also, change of machine parameters due to magnetic saturation may cause the originally provided capability curve insufficient to obtain an accurate operating region. The study presented in this thesis work fulfils the need for actual visualization of capability diagrams using the MATLAB software environment for both cylindrical and non-cylindrical rotor type synchronous machines. Initially, the capability curve of machines is plotted considering the limiting conditions and after that the simulation and study of variation on the PQ loading after occurrence of possible disturbance scenarios on the power system network is carried out in PSAT (Power System Analysis Toolbox) software. The Generator capability curve is developed in MATLAB software environment for both cylindrical and non-cylindrical rotor type machines and from the data obtained after time domain simulation in PSAT applied on an IEEE 9 and 14 bus power system the operating scheme of one round rotor generating unit of each test system is discovered in developed diagram.