Static VAR compensator-based voltage control implementation of single-phase self-excited induction generator

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Static VAR compensator-based voltage control implementation of single-phase self-excited induction generator

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A single-phase static VAR compensator (SVC) is proposed to regulate smoothly the output voltage of a single-phase self-excited induction generator (single-phase SEIG) driven by a variable-speed prime mover (VSPM) due to inductive load and prime mover speed variations. A PI feedback closed-loop voltage regulation scheme is presented to adjust the equivalent excitation capacitance of the single-phase SVC. The SVC is composed of a fixed excitation capacitor (FC), thyristor switched capacitor (TSC) and thyristor controlled reactor (TCR). The steady-state single-phase SEIG output voltage and the TCR triggering angle responses of the proposed scheme are simply evaluated and discussed. A small-scale single-phase SEIG voltage control prototype is designed in order to verify system viability and assess its performance. System dynamic operation is studied based on experimental results. Simulation and experimental results prove system practical effectiveness in terms of fast response and high performance.

Inspec keywords: closed loop systems; static VAr compensators; voltage control; PI control; circuit feedback; asynchronous generators

Other keywords: fixed excitation capacitor; PI feedback closed-loop voltage regulation; voltage control; single-phase self-excited induction generator; thyristor switched capacitor; variable-speed prime mover; static VAR compensator; thyristor controlled reactor; output voltage regulation

Subjects: Asynchronous machines; Power electronics, supply and supervisory circuits; Control of electric power systems; Control theory; Other power apparatus and electric machines; Voltage control

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