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AssigneeXi'an Jiaotong University
InventorsYibin LIU, Deliang LIANG, Yanting XUE, Hao JIN
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Disclosed are a soft start method, device, and system of a hybrid distribution transformer (HDT) based on unbypassing its voltage-compensating converter, which belong to the technical field of transformer control. According to the method, through a grid-side current controller, a DC-link voltage controller, a split-capacitor voltage balance controller, and a load voltage controller, a start process of the HDT is divided into an uncontrolled rectification stage and a PWM rectification stage. According to the present disclosure, an anti-parallel thyristor of the voltage-compensating converter is closed without a bypass in a process of energization. A DC-link capacitor is charged by respective converters of two transformers of the HDT simultaneously, and thus an energization flow is simpler. In addition, an inrush current at an initial phase of the PWM rectification stage can be effectively mitigated by improving an existing steady-state control strategy.
A soft-start method of a hybrid distribution transformer (HDT) based on unbypassing its voltage-compensating converter, comprising an uncontrolled rectification stage and a PWM rectification stage;
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