Performance characteristics and reliability assessment of self‐excited induction generator for wind power generation

Abstract

The paper presents the performance analysis‐based reliability estimation of a self‐excited induction generator (SEIG) using the Monte‐Carlo simulation (MCS) method with data obtained from a self‐excited induction motor operating as a generator. The global acceptance of a SEIG depends on its capability to improve the system's poor voltage regulation and frequency regulation. In the grid‐connected induction generator, the magnetizing current is drawn from the grid, making the grid weak. In contrast, in the SEIG stand‐alone operation, an external capacitor arrangement is implemented to render the reactive power support. This capacitor arrangement is connected across the stator terminals during the stand‐alone configuration of SEIG. The capacitor serves two purposes, which include voltage build‐up and power factor improvement. Therefore, the paper deals with obtaining the minimum capacitor value required for SEIG excitation in isolated mode applications, including stand‐alone wind power generation. The SEIG performance characteristics have been evaluated for different SEIG parameters. The simulation and experimental results are then compared and found satisfactory. Then, SEIG reliability is estimated considering the MCS method utilizing SEIG excitation's failure and success rates during experimental work in the laboratory. Finally, the SEIG reliability evaluation is performed considering different wind speeds.

Control of self-excited induction generator based wind turbine using current and voltage control approaches

“…It shows that the terminal voltage is 220V for the varying load power values. Execute the exploration phase and examine the varying gain values using equation (16) Update the gains using equation (19) Generate the random values using equation (17) Examine gains using equation ( 18)…”

“…However, the voltage and current regulation in the SEIG is affected by the excitation capacitance and variations in speed [15]. Moreover, the performance of SEIG is affected by the impedance load and loss of residual mechanism depending on the voltage and frequency [16]. The output frequency of the generator has a great impact on the speed of WT; thus, it is necessary to control the speed of the turbine.…”

Control Strategies and Performance Analysis of Doubly Fed Induction Generator for Wind Energy Conversion System

“…They are the differential currents in one phase, and the circulating current between the phases. The differential current is defined at the AC connection node and the average of difference in the current in the upper and lower arm of phase [16]. The circulating currents flowing in the arm which are based on the differential currents are given as…”

Enhancing the performance of Wound-Rotor Self-Excited Induction Generator for Wind Energy Application

“…In this case, the system cost could be further reduced by the use of a simple rotor resistance controller. Another advantageous feature of the (SEWRIG) is that independent control of the voltage and frequency can be achieved [8][9][10][11].…”