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In order to realize motor's regenerated energy storage and reutilization, a segmented power distribution control system is proposed in this paper based on hybrid regenerative cascaded multilevel converter. The energy storage cells and ordinary cells are connected together to form a hybrid cascaded topology, which reduces the number of active front ends and secondary windings of phase-shifting transformer...
This paper describes a hybrid cascaded inverters, which can be applied to low power energy storage system. The working mode of the circuit and the dead-time effect are analyzed. Base on the traditional control mode, a new way is given to control the auxiliary capacitor voltage. In order to solve the problem that multilevel SPWM method take up to much system resources, this paper put forward a single...
This paper presents a three-phase four-wire shunt active power filter (APF) based on hybrid cascade H-bridge seven-level converter as its main circuit with star configuration. A new modulation method based on carrier disposition PWM (CD-PWM) is proposed for the converter which solves the power reverse problem effectively. In system control, DC-link total voltage control based on active current vector...
In this paper, a three-phase four-wire shunt active power filter (APF) is studied. In order to reduce voltage stress of power devices and improve the performance and practicality of APF in high voltage and capacity occasions, a hybrid cascade H-bridge seven-level converter is adopted as the main circuit of the APF. In system control, DC-link total voltage control is realized by transferring active...
In the high-voltage large-capacity power grid environment, an improved hybrid cascaded multilevel APF topology has been adopted to reduce the requirement of DC bus voltage and reduce the power loss to improve APF performance. This topology contains the voltage source bridge and the current source bridge. These two parts are in series. In order to provide a low voltage for AC bus of the current source...
In this paper, we present an active boosting algorithm to learn the object detector. This algorithm is to find good features from a confidential map instead of brute-force searching the predefined feature set. The confidential map is computed from the importance re-sampled data. A new feature is created by the linear combination of blocks that are selected from different segmented regions. In addition,...
This paper will present an improved cascade multilevel converter that is the series-connection of a diode-clamp converter and several H-bridge converters with equal dc bus voltage. According to this topology, a hybrid modulation method which incorporates square-wave synthesis in conjunction with unipolar triangle carried-based PWM method is illustrated. By the hybrid control scheme, higher voltage...
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