Transient Analysis of a Synchronous Generator Using a High-Order State Space Representation

Abstract

A state-space representation of a Synchronous generator is established and used to analyze the transient behavior of a Synchronous Generator. The machine is a 2 pole, 150 MVA, 120 MW, 13.8 kV, 50 Hz generator connected to an infinite bus through a transformer and a transmission line. The state-space representation is based on a two-axis equivalentcircuit model of the generator and includes the swing equation and the voltage regulator. The two-axis representation of the infinite bus voltage is chosen as reference. A three phase short circuit is simulated at the transformer terminals. Graphic results are analyzed and compared with actual measurements and with those obtained from a finite element model of the generator. The results give insight into the electromagnetic phenomena and the state-space representation provides a platform for the analysis of control schemes to improve the stability of the generator.

Experimental analysis of an alternator excited with photovoltaic cells for small power plants

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“…(1)(2)(3)(4), the parameters are calculated as below.Daily load demand,W = 220 • 1.4 • 4 • 1 24 • 1 0.95 • 1 0.95 • 1 0.98 = 58Ah/day . Storage day number, D noncritic = −0.48 • 2.25 + 4.58 = 3.5 days.…”

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“…There have been a lot of researches, including automatic control of voltage and speed of energy transformation in synchronous generators [4][5][6]. The behavior of the alternators feeding the electrical system has a serious effect on the stability of power system in a fault situation [7,8].…”