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This study attempted to implement the pulse power supply and ignition circuits of a xenon flash lamp in intense pulsed light (IPL) systems used in electronic printing. Owing to the unique load characteristics of the xenon flash lamp, a special power supply design is essential to drive it. Specifically, the pulse power supply integrates the LCC resonant converter-based charging unit, designed to achieve high efficiency and high-power density charging, and a discharging unit, comprising the discharging IGBT and RDC snubber circuits, to realize stable pulse transfer to the load. For the ignition process, the high-voltage output trigger was designed based on the Cockcroft–Walton voltage multiplier. Meanwhile, the simmer was adopted as the step-down LCC resonant converter with the characteristics of both voltage and current sources to maintain the xenon flash lamp ignition. An auxiliary ignition circuit based on a boost-type resonant circuit was also added to stabilize the simmer output during ignition. In this study, we analyzed the sequence of operating the xenon lamp for ignition and light sintering by designing and developing appropriate parameters for each specification. Finally, the implemented power supply was verified through simulated load, and the xenon flash lamp was confirmed to be turned on normally through experiments. Additionally, the reliability was verified by applying the proposed device to the IPL system. [ABSTRACT FROM AUTHOR]

In this study, a frequency regulation is proposed that adjusts the release of rotational kinetic energy to ensure that a wind turbine remains near the maximum power point in the event of persistent under-frequency. The proposed scheme calculates wind turbine power by multiplying the frequency deviation with the variable control gain and then adding the resulting value to the torque controller power. Considering the operational characteristics of the wind turbine, separate control gains are applied in both the over-frequency section (OFS) and the under-frequency section (UFS). When the rotor speed approaches the maximum power point (MPP), the UFS control gain decreases, causing the wind turbine to gradually transition to maximum power point tracking (MPPT). This overcomes the limitations of conventional frequency regulation, enhancing both the power output of the wind turbine and the average grid frequency. To validate the proposed scheme, an IEEE 14 bus system, including a wind power plant and a photovoltaic plant, was simulated using the EMTP-RV simulator. The simulation results demonstrate that the proposed scheme effectively performs frequency regulation in the power grid regardless of the wind penetration. [ABSTRACT FROM AUTHOR]