SVPWM With Voltage Balance Control in DC Side Based on the Solid-State Transformer

doi:10.11985/2018.02.005

Abstract

Abstract:

Solid-state transformer has the function of conversion and isolation in different voltage grade as the important equipment of energy internet, and it can integrate distributed renewable energy effectively, but also has some imbalance problem in voltage. At first,the SVPWM of single-phase solid-state transformer cascaded by arbitrary number of H bridge and the principle of voltage balance control are studied in the paper. Then, a control strategy which control one of H bridge's voltage through solid-state transformer voltage control loop is proposed, and this strategy control other H bridge's voltage to follow master H bridge by adding a new control loop in the SVPWM which control the vector pulse width of each slave H bridge. Finally, the simulation verifies the correctness of strategy proposed.

Key words: Solid-state transformer, single phase cascaded H bridge, voltage balance

CLC Number:

TM464

Kai Liu,Caixue Chen,Jun Wen. SVPWM With Voltage Balance Control in DC Side Based on the Solid-State Transformer[J]. Journal of Electrical Engineering, 2018, 13(2): 29-35.

Figures/Tables 14

Fig.1

Fig.2

Fig.3

Fig.4

Tab.1

Fig.5

Fig.6

Fig.7

Fig.8

Fig.9

Tab.2

Fig.10

Fig.11

Fig.12

References 14

[1]	Huang A Q, Crow M L, Heydt G T , et al. The future renewable electric energy delivery and management (FREEDM) system: the energy internet[J]. Proceedings of the IEEE, 2011,99(O1):133-148.
[2]	Huang A Q . FREEDM system-a vision for the future grid [C]. Power and Energy Society General Meeting, Minneapolis, MN, 2010: 1-4.
[3]	Dujic D, Zhao C, Mester A , et al. Power electronic traction transformer-low voltage prototype[J]. IEEE Transactions on Power Electronics, 2013,28(12):5522-5534.
[4]	苟伟 . 一种模块级联固态变压器及其控制策略的研究[D]. 杭州:浙江大学, 2013.
[5]	吴瑕杰, 熊成林, 侯聂 , 等. 一种适用于任意电平数三相级联H桥变换器的简化多电平SVPWM算法[J]. 中国电机工程学报, 2016,36(10):2753-2761.
	Wu Xiajie, Xiong Chenglin, Hou Nie , et al. A simplified multilevel space vector pulse width modulation algorithm for three-phase cascaded H-bridge converters with any level[J]. Proceeding of the CSEE, 2016,36(10):2753-2761.
[6]	葛俊杰, 赵争鸣 . 级联型电压自平衡固态变压器[J]. 清华大学学报(自然科学版), 2013,54(4):459-464.
	Ge Junjie, Zhao Zhenming . Cascaded voltage self balancing solid state transformer[J]. Journal of Tsinghua University (Science and Technology), 2013,54(4):459-464.
[7]	Xu She, Alex Q Huang . 3-D space modulation with voltage balancing capability for a cascaded seven-level converter in a solid-state transformer[J]. IEEE Transactions on Power Electronics, 2011,26(12):3778-3789.
[8]	Zhao F, Wang G, Bhattavhrya S , et al. Voltage and power balance control for a cascaded H-bridge converter based solid state transformer[J]. IEEE Transactions on Power Electronic, 2013,28(4):1523-1532.
[9]	王顺亮, 宋文胜, 冯晓云 . 一种单相级联H桥整流器SVPWM及其电容电压平衡控制方法[J]. 铁道学报, 2016,07:26-33.
	Wang Shunliang, Song Wenbing, Feng Xiaoyun . A SVPWM method with capacitor voltage balancing control for single phase cascaded H-bridge rectifiers[J]. Journal of the China Railway Society, 2016,38(7):26-33.
[10]	Zhao T F, Wang G Y, Bhattacharya S , et al. Voltage and power balance control for a cascaded H-bridge converter-based solid-state transformer[J]. IEEE Transactions on Power Electronics, 2013,28(4):1523-1532.
[11]	Bhattacharya S, Zhao T F, Wang G Y, et al. Design and development of generation-I silicon based solid state transformer [C]. In Proc. 25th IEEE Appl. Power Electron. Conf. Expo. , 2010: 1666-1673.
[12]	吴剑 . 模块级联型三相固态变压器及其控制策略的研究[D]. 杭州:浙江大学, 2015.
[13]	高虎军 . 移相全桥DC/DC变换器的设计与研究[D]. 西安:长安大学, 2013.
[14]	苑春明 . 三电平变换器SVPWM关键技术研究[D]. 合肥:合肥工业大学, 2008.

时间扇区	T_min/3	T_max/3	T_min/3	T_max/3	T_min/3	T_max/3
3	110	111	011	111	101	111
2	100	110	010	011	001	101
1	000	100	000	010	000	001
-1	000	-100	000	0-10	000	00-1
-2	-100	-1-10	0-10	0-1-1	00-1	-10-1
-3	-1-10	-1-1-1	0-1-1	-1-1-1	-10-1	-1-1-1

参数	数值	参数	数值
电网电压/V	220	直流母线电压/V	400
H桥电容电压/V	200×3	交流负载端口电压/V	220
AC/DC开关频率/kHz	10	低压直流负载电压/V	20
DC/DC开关频率/kHz	10	负载电阻/Ω	5