An optimized bidirectional buck-boost converter for DC bus voltage stabilization in new generation poloidal field power supply

doi:10.1016/j.egyr.2021.11.016

	An optimized bidirectional buck-boost converter for DC bus voltage stabilization in new generation poloidal field power supply
	Chen, Tao 1,2; Fu, Peng 1,2; Chen, Xiaojiao 1; Dou, Sheng 1,2; Huang, Liansheng 1,2; He, Shiying 2; Wang, Zhengshang 1,2
刊名	ENERGY REPORTS
	2022-05-01
卷号	8
关键词	Nuclear fusion device Poloidal field power supply Bidirectional buck-boost active storage unit (ASU) Quickly response Dual closed-loop controller
ISSN号	2352-4847
DOI	10.1016/j.egyr.2021.11.016
通讯作者	Chen, Tao(chen.tao@ipp.ac.cn) ; Chen, Xiaojiao(chenxj@ipp.ac.cn)
英文摘要	In the Tokamak device of controllable nuclear fusion, the poloidal field power supply (PFPS) provides the dynamic magnetic field inside the device. The power level of full-controllable devices has been improved with the rapid development of high-power semiconductor technology, which promotes the upgrade of poloidal field power supply. The PFPS adopts an AC-DC-AC circuit structure, which makes the load coil operate in four quadrants. Because the load is a superconducting magnet coil, the power of the load coil will change for a period of time to meet the demand of the internal magnetic field of Tokamak, resulting in the instability of DC bus voltage. This paper proposes an optimized bidirectional buck-boost active storage unit (ASU) with unidirectional inductor current, which can quickly make the bus voltage stable. In the circuit structure, the direction of the inductor current is unidirectional, which avoids the slow response of the inductor current in the reverse direction of the traditional buck-boost converter; And the inductor has a controllable freewheeling circuit, which can reduce the disturbance of inductor current to bus charging. The number of inductors is small, which avoids the large volume of traditional dual-inductor DC-DC converter; Compared with the traditional buck-boost converter, the buck-boost ASU with unidirectional inductor current improves the energy utilization of the bus capacitor. By establishing the mathematical model of the circuit topology, the dual closed-loop controller and modulation strategy are used to control the stable operation of the system. The simulation results show that the circuit structure can balance the bus voltage well and keep stable, when the load power changes suddenly. (c) 2021 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
资助项目	National Key R&D Program of China[2017YFE0300504] ; Comprehensive Research Facility for Fusion Technology Program of China[2018-000052-73-01-001228]
WOS关键词	TOPOLOGIES
WOS研究方向	Energy & Fuels
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000730899500013
资助机构	National Key R&D Program of China ; Comprehensive Research Facility for Fusion Technology Program of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/126904]
专题	中国科学院合肥物质科学研究院
通讯作者	Chen, Tao; Chen, Xiaojiao
作者单位	1.Chinese Acad Sci, Inst Plasma Phys, Hefei, Peoples R China 2.Univ Sci & Technol China, Hefei, Peoples R China
推荐引用方式 GB/T 7714	Chen, Tao,Fu, Peng,Chen, Xiaojiao,et al. An optimized bidirectional buck-boost converter for DC bus voltage stabilization in new generation poloidal field power supply[J]. ENERGY REPORTS,2022,8.
APA	Chen, Tao.,Fu, Peng.,Chen, Xiaojiao.,Dou, Sheng.,Huang, Liansheng.,...&Wang, Zhengshang.(2022).An optimized bidirectional buck-boost converter for DC bus voltage stabilization in new generation poloidal field power supply.ENERGY REPORTS,8.
MLA	Chen, Tao,et al."An optimized bidirectional buck-boost converter for DC bus voltage stabilization in new generation poloidal field power supply".ENERGY REPORTS 8(2022).