Small-scale wind turbine coupled single-phase self-excited induction generator with SVC for isolated renewable energy utilization

Stabilization of a Wind Farm Using Static VAR Compensators (SVC) Based Fuzzy Logic Controller

“…The SVCs in use nowadays are of variable susceptance type [16]. susceptance B needed to keep the system voltage constant, A distribution unit that determines the TSCs (and eventually TSRs) that must be switched in and out, and computes the firing angle α of TCRs and A synchronizing system using a phase-locked loop (PLL) synchronized on the secondary voltages and a pulse generator that send appropriate pulses to the thyristors [11]. The SVC can be operated in two different modes: In voltage regulation mode and in Var control mode (the SVC susceptance is kept constant) [22].…”

“…Due to simplest structure, easy designing and low cost, PI controller is used in SVC as voltage regulator in most industries [11].The SVC can be operated to provide reactive power control or closed-loop AC voltage control. For closed-loop AC voltage control, the line voltage, as measured at the point of connection, is compared to a reference value and an error signal is produced.…”

“…Fuzzy Logic has attracted considerable attention as a novel computational system because of the variety of advantages it offers over the conventional computational systems [11]. Fuzzy logic controllers have been successfully applied to control non-linear dynamic systems [12,13] especially in the field of adaptive control by making use of on-line training.…”

“…The Implementing static VAR compensators (SVC) with wind farm induction generators for improving voltage stability and transient stability have been investigated and discussed [7][8][9][10][11][12]. Most large wind farms, and the grid connected wind turbine generator systems should meet the requirements of low voltage ride through (LVRT) during different gird faults.…”

“…A fixed excitation capacitor(FC) in parallel with the thyristor switched capacitor(TSC) and the thyristor controlled reactor(TCR), static VAR compensator (SVC) has been applied to regulate and stabilize the generated terminal voltage of the single-phase self-excited induction generator(SE1G). The traditional proportional plus integral (PI) controller has been applied to adjust the equivalent capacitance of the single-phase SVC in the output of the single-phase SEIG [11]. The enhancement process of applying static synchronous compensators (STATCOM) has been compared to the thyristor controlled static var compensator (SVC) in low voltage ride through (LVRT) capability of wind farms using squirrel cage generators.…”