Steady State Analysis of Capacitor Self-Excited Induction Generators
ABSTRACT The paper presents a method for the steady state analysis of self-excited induction generators using balanced terminal capacitors. Operational and steady state equivalent circuits of the induction machine are employed to predict the steady state performance under different load conditions. The analytical procedure and the related computer program is described in the paper. Simulated results are presented and compared with corresponding results obtained experimentally.
- SourceAvailable from: ijeei.org[Show abstract] [Hide abstract]
ABSTRACT: The use of the isolated hybrid power systems is being popular due to the continuous increasing gap between demand and supply of conventional energy sources and intermittent nature of non-conventional energy sources. Normally, the non-conventional energy source such as wind have induction generator to generate electricity but induction generators require reactive power for its operation and this demand is continuously changing by the variation of load and wind power. The synchronous generator used in hybrid system for generating power through diesel system is supplying reactive power to the system partially; therefore, another source of reactive power is required to fulfill this demand. In this paper, the static VAR compensator (SVC) and static synchronous compensator (STATCOM) using a proportional-integral controller (PI) are used as reactive power compensator. The dynamic performance of SVC and STATCOM are investigated for wind-diesel and wind-diesel-microhydro power systems ate constant slip operation of induction generators. The results show that the STATCOM is a better option than that of SVC for reactive power control of the hybrid system.
- [Show abstract] [Hide abstract]
ABSTRACT: This paper presents a simple method of evaluating the performance characteristics of a Self Excited Induction Generator (SEIG) using Scilab. Scilab is a free and open source software for numerical computation and is used for engineering and scientific applications. This paper incorporates a numerical-based routine available in scilab that avoids the detailed algebraic derivations required for performance evaluation. Mathematical models for evaluating the steady state behaviour of SEIG under no-load, variable load and constant machine terminal voltage operation are developed. The developed model is then used to predict the performance of a 3.7 kW, 415 V, 7.6 A, 1430 rpm induction machine available in the laboratory. The results validate theoretical studies.2014 International Conference on Advances in Energy Conversion Technologies (ICAECT); 01/2014
- [Show abstract] [Hide abstract]
ABSTRACT: The paper presents a detailed analysis of self-excited induction generators with resistive-inductive loads. A nonlinear dynamic model is derived that enables a unified analysis of both the steady-state and transient characteristics of the machine. Steady-state operating modes are first determined, and self-excitation boundaries are derived. Computations are straightforward and do not require iterations. The dynamic model is also used to compute the eigenvalues of the linearized system around an operating mode. Experimental data show good agreement with computational results using the dynamic model. It is found that the addition of inductance generally, but not necessarily, enlarges the set of conditions where self-excitation is possible, and increases the stability of the operating modes.SPEEDAM 2014; 07/2014