公开(公告)号：US09960666B2

公开(公告)日：2018-05-01

申请号：US15520420

申请日：2016-03-16

Applicant: Southeast University

Inventor： Jianfeng Zhao ,  Dongye Li ,  Zhendong Ji ,  Yichao Sun

IPC: H02M1/32 ,  H02M3/335 ,  H02M7/5387 ,  H02M5/458 ,  H02M1/10 ,  H02M1/00

CPC classification number: H02M1/32 ,  H02M1/10 ,  H02M3/285 ,  H02M3/33592 ,  H02M3/3376 ,  H02M5/4585 ,  H02M7/5387 ,  H02M2001/007 ,  H02M2001/325 ,  H02M2007/4835

Abstract: Disclosed in the present invention is a four-port power electronic transformer based on a hybrid modular multilevel converter (MMCs). The four-port power electronic transformer includes a hybrid MMC, direct current (DC)/DC converters, and an inverter. Each DC/DC converter includes a front stage part, a high frequency transformation part and a back stage part. Compared with an existing power electronic transformer, the present invention has the following characteristics: an MMC module and a front stage of a DC/DC circuit connected to the MMC module jointly complete DC fault ride-through, and the number of adopted devices is small; the MMC module controls a DC voltage and the DC/DC circuit controls power; voltages of one or two capacitors in the module can be controlled independently or simultaneously; and the four-port power electronic transformer has four ports: a high-voltage DC port, a high-voltage alternating current (AC) port, a low-voltage DC port, and a low-voltage AC port, and is applicable to a high-voltage high-power scenario with multiple voltage types and levels, particularly to the energy internet to be used as an energy router and the like.

公开(公告)号：US09755696B2

公开(公告)日：2017-09-05

申请号：US15310389

申请日：2014-07-15

Applicant: SOUTHEAST UNIVERSITY

Inventor： Jianfeng Zhao ,  Zhendong Ji ,  Wei Liu ,  Yichao Sun

IPC: H04B3/54 ,  H04L27/12 ,  H04L25/49

CPC classification number: H04B3/54 ,  H04L25/4902 ,  H04L27/12

Abstract: A method of data transmission between power electronic devices without a communication line involves generation of a digital signal in a data transmission process. The digital signal enables PWM modulation of specific data information via a composite modulation method. The composite modulation superimposes PWM modulation waves after modulating the PWM carrier frequency or conducting high-frequency modulation on the data. The composite modulation generates a PWM drive pulse signal which is transmitted to a power circuit via a main power electronic circuit to complete the data transmission process. In the data receiving process, signals are extracted on the voltage and current of a power line via software or hardware, and data demodulated to obtain the data information to complete the data receiving process.

公开(公告)号：US20170149473A1

公开(公告)日：2017-05-25

申请号：US15310389

申请日：2014-07-15

Applicant: SOUTHEAST UNIVERSITY

Inventor： Jianfeng Zhao ,  Zhendong Ji ,  Wei Liu ,  Yichao Sun

IPC: H04B3/54 ,  H04L27/12

CPC classification number: H04B3/54 ,  H04L25/4902 ,  H04L27/12

Abstract: A method of data transmission between power electronic devices without a communication line involves generation of a digital signal in a data transmission process. The digital signal enables PWM modulation of specific data information via a composite modulation method. The composite modulation superimposes PWM modulation waves after modulating the PWM carrier frequency or conducting high-frequency modulation on the data. The composite modulation generates a PWM drive pulse signal which is transmitted to a power circuit via a main power electronic circuit to complete the data transmission process. In the data receiving process, signals are extracted on the voltage and current of a power line via software or hardware, and data demodulated to obtain the data information to complete the data receiving process.