CAPSA Problem No. 8 - SIMULINK

PROBLEM NO. 8

Objective:
Using SIMULINK, design and simulate a two-area power system model connected by a tie line.

Problem:
A two area system connected by a tie line has the following parameters on a 1000-MVA common base

AREA 1
Speed Regulation
R1 = 0.05
Frequency-sensitive load coefficient
D1 = 0.6
Inertia Constant
H1 = 5
Base power
1000 MVA
Governor time constant
τg1 = 0.2 sec
Turbine time constant
τT1 = 0.5 sec

AREA 2
Speed Regulation
R2 = 0.0625
Frequency-sensitive load coefficient
D­2 = 0.9
Inertia Constant
H2 = 4
Base power
1000 MVA
Governor time constant
τg2 = 0.3 sec
Turbine time constant
τT2 = 0.6 sec

The units are operating in parallel at the nominal frequency of 60 Hz. The synchronizing power coefficient is computed from the initial operating condition and is given to be Ps = 2.0 per unit. A load change of 187.5 MW occurs in area 1. Construct the SIMULINK block diagram and obtain the frequency deviation response.