Normalised adaptive linear element‐based control of single‐phase self excited induction generator feeding fluctuating loads

Abstract

In this study, a new normalised adaline-based control algorithm is proposed to control voltage source converter (VSC) used for voltage control and harmonics mitigation of two-winding asymmetric single-phase self excited induction generator (SEIG) feeding fluctuating linear and non-linear loads. The proposed control algorithm is implemented on a digital signal processor (DSP). In the proposed SEIG system, a two-winding asymmetric single-phase SEIG is driven by a speed governor controlled diesel/biogas engine. The VSC is used for adjustable fundamental reactive current compensation of a two-winding single-phase SEIG for voltage control, and harmonics elimination of variety of loads. An insulated gate bipolar transistorbased two-leg VSC is connected at the point of common coupling. The proposed new control algorithm has many distinct advantages such as fast response which is highly desirable for fluctuating loads and fast convergence at all frequency components. The mathematical formulation of the proposed control algorithm is given and recorded test results of the SEIG system are presented to demonstrate the voltage control, harmonics mitigation and fast response of the algorithm. The proposed controller of single-phase SEIG system is designed, developed and implemented on a DSP to validate the claims. A MATLAB simulation model of SEIG system with proposed controller is also developed and simulated results are presented along with the test results to validate the model developed.

A Comprehensive Overview of Single–Phase Self-Excited Induction Generators

“…Another topology involves the use of a single-phase inverter bridge, with energy storage elements connected on its DC side [68][69][70]76] or without storage such in [77]. A more complex structure, named Decoupled Voltage and Frequency Controller (DVFC) [64,67], integrates both the inverter bridge and the ELC.…”

Implementation of Voltage Controller of Single-phase Self-excited Induction Generator

“…Block (12) is a zero-crossing detector, for which output e 4 is a square wave, as shown in Figures 2(b) and 2(c). e 4 is fed to amplifier block (14) and inverting amplifier block (13) in Figure 1(a). e 5 is k times e 4 and e 6 is -k times e 4 , and both signals are square wave.…”

“…e 7 (and e 5 ) is always complementary of e 8 (and e 6 ), as shown in Figure 2(d). The EMI filter removes the high-frequency EMI interference generated by the CMOSintegrated circuit of the inverting amplifier and amplifier, represented by blocks (13) and (14) in Figure 1(af). The outputs of blocks (15) and (16) (signals e 8 and e 7 ) are fed, respectively, to AND gate blocks (9) and (8) in Figure 1(a) as a third inputs.…”

“…Numerous publications on steady-state and dynamic analysis of self-excited induction generators (SEIGs) and several schemes for improving voltage regulation of SEIGs based on the electronic load controller (ELC), static VAR compensator (SVC), and distribution static compensator (DSTATCOM) have been well documented in [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. For constant voltage operation at varying loads, it is necessary to adjust the excitation reactive power continuously with loads.…”

“…For constant voltage operation at varying loads, it is necessary to adjust the excitation reactive power continuously with loads. SVC-and DSTATCOM-based schemes [14][15][16] were also proposed to provide adjustable reactive power; however, both SVC-and DSTATCOM-based voltage regulating schemes are expensive, bulky, and larger in size, so their application in a very small power generation (up to 5 kW) in remote areas may not be justifiable.…”