Control Strategy for SMES Energy Storage ConverterBased on Linear Active Disturbance Rejection Control

doi:10.12204/j.issn.1000-7229.2020.11.008

Abstract

Abstract:

As an indispensable and significant part of the microgrid, the energy storage system plays an important role in the stable operation of the microgrid and ensuring power quality of the microgrid. This paper proposes a control strategy for SMES energy storage converter based on linear active disturbance control (LADRC) , which can estimate and compensate the system disturbance, so that it could effectively improve the power quality and robustness of the energy storage system. Analysis of the frequency response characteristics of the LADRC and PI control systems shows that the feedback compensator of first-order LADRC composed of a PI controller and a first-order low-pass filter in series can effectively suppress the high-frequency noise of the system; And the stability and robustness of the control system of LADRC are analyzed by root locus method. The MATLAB simulation results show that the control strategy for the SMES energy storage converter based on LADRC has the advantages of fast response, high control accuracy and strong anti-disturbance ability, and its control effect and robustness are both better than traditional PI controllers.

Key words: microgrid, SMES energy storage converter, linear active disturbance control(LADRC), root locus method, robustness

CLC Number:

TM76

ZHANG Gang, LEI Yong, LI Yongkai, ZHOU Wei. Control Strategy for SMES Energy Storage ConverterBased on Linear Active Disturbance Rejection Control[J]. ELECTRIC POWER CONSTRUCTION, 2020, 41(11): 78-86.

Figures/Tables 16

Fig.1 Topological structure of SMES

Fig.2 Control structure of LADRC

Fig.3 Overall control block diagram of SMES

Fig.4 Two-degree-of-freedom equivalent structure of LADRC

Fig.5 Bode plots of C2(s) and CPI(s) as ω0varies, in which KP=16.5,KI=83.1

Fig.6 Bode plots of C2(s) and CPI(s) as ωcvaries, in which KP=16.5,KI=83.1

Fig.7 Poles of the closed-loop transfer function when ω0 changes

Fig.8 Poles of the closed-loop transfer function when ωc changes

Fig.9 Root locus of the system with different b

Table 1 Simulation parameter values

Fig.10 Waveforms of power output response of SMES converter

Fig.11 Output current and voltage from AC-side of energy storage converter

Fig.12 Comparison of current THD under two control strategies

Fig.13 Waveforms of DC-side voltage

Fig.14 Output power from the AC-side of the energy storage converter after the filter inductor L is changed

Fig.15 Waveforms of output voltage and current from the AC-side of the energy storage converter after the filter inductor L is changed

References 25

[1]	李宏仲, 吕梦琳, 胡列翔 , 等. 第24届国际供电会议研究成果综述: 微电网的规划与运行[J]. 电网技术, 2019,43(4):1465-1471.
	LI Hongzhong, LÜ Menglin, HU Liexiang , et al. Review of CIRED 2017 on microgrid planning and operation[J]. Power System Technology, 2019,43(4):1465-1471.
[2]	GAO M Z, ZHANG C H, QIU M H, et al. Design of control system for smooth mode transfer in smart microgrid application [C]//2016 IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE, 2016: 138-142.
[3]	朱英伟, 付伟真, 林晓冬 , 等. 基于动态演化理论的SMES变流器控制策略[J]. 电力自动化设备, 2019,39(12):7-13.
	ZHU Yingwei, FU Weizhen, LIN Xiaodong , et al. Control strategy of SMES converter based on dynamic evolution theory[J]. Electric Power Automation Equipment, 2019,39(12):7-13.
[4]	李想, 张建成, 王宁 . 超级电容器-飞轮-蓄电池混合储能系统容量配置方法研究[J]. 中国电力, 2018,51(11):117-124.
	LI Xiang, ZHANG Jiancheng, WANG Ning . Capacity configuration strategy for super capacitor-flywheel-battery hybrid energy storage system[J]. Electric Power, 2018,51(11):117-124.
[5]	BAHLOUL M, KHADEM S K . Impact of power sharing method on battery life extension in HESS for grid ancillary services[J]. IEEE Transactions on Energy Conversion, 2019,34(3):1317-1327.
[6]	徐国栋, 程浩忠, 马紫峰 , 等. 用于平滑风电出力的储能系统运行与配置综述[J]. 电网技术, 2017,41(11):3470-3479.
	XU Guodong, CHENG Haozhong, MA Zifeng , et al. An overview of operation and configuration of energy storage systems for smoothing wind power outputs[J]. Power System Technology, 2017,41(11):3470-3479.
[7]	XIAO J F, WANG P, SETYAWAN L . Multilevel energy management system for hybridization of energy storages in DC microgrids[J]. IEEE Transactions on Smart Grid, 2016,7(2):847-856.
[8]	KOLLIMALLA S K, MISHRA M K, UKIL A , et al. DC grid voltage regulation using new HESS control strategy[J]. IEEE Transactions on Sustainable Energy, 2017,8(2):772-781.
[9]	辛征, 魏莉, 施啸寒 . SMES装置用电压源型变流器双闭环功率控制系统设计[J]. 电力自动化设备, 2018,38(12):168-173, 193.
	XIN Zheng, WEI Li, SHI Xiaohan . Design of double closed-loops control system of VSC used in SMES device[J]. Electric Power Automation Equipment, 2018,38(12):168-173, 193.
[10]	汪万伟, 尹华杰, 管霖 . 双闭环矢量控制的电压型PWM整流器参数整定[J]. 电工技术学报, 2010,25(2):67-72, 79.
	WANG Wanwei, YIN Huajie, GUAN Lin . Parameter setting for double closed-loop vector control of voltage source PWM rectifier[J]. Transactions of China Electrotechnical Society, 2010,25(2):67-72, 79.
[11]	KIM S K, CHOI D K, LEE K B , et al. Offset-free model predictive control for the power control of three-phase AC/DC converters[J]. IEEE Transactions on Industrial Electronics, 2015,62(11):7114-7126.
[12]	XING Y Q, JIN J X, WANG Y L , et al. An electric vehicle charging system using an SMES implanted smart grid[J]. IEEE Transactions on Applied Superconductivity, 2016,26(7):1-4.
[13]	林晓冬, 雷勇 . 基于T型三电平变流器的超导磁储能系统及其能量成型控制策略[J]. 电网技术, 2018,42(2):607-613.
	LIN Xiaodong, LEI Yong . Three-level T-type converter for superconducting magnetic energy storage system and its energy-shaping control strategy[J]. Power System Technology, 2018,42(2):607-613.
[14]	林晓冬, 雷勇 . SMES/BESS储能变流器在微电网中的控制策略研究[J]. 电网技术, 2018,42(5):1458-1466.
	LIN Xiaodong, LEI Yong . Research on control strategy of SMES/BESS energy storage converters in microgrid[J]. Power System Technology, 2018,42(5):1458-1466.
[15]	孟琦, 侯忠生 . 非严格重复逆变器系统自抗扰学习控制[J]. 控制理论与应用, 2018,35(11):1663-1671.
	MENG Qi, HOU Zhongsheng . Active disturbance rejection learning control for inverter systems with non-repetitive features[J]. Control Theory & Applications, 2018,35(11):1663-1671.
[16]	GÓMEZ JORGE S, BUSADA C A, SOLSONA J A . Frequency-adaptive current controller for three-phase grid-connected converters[J]. IEEE Transactions on Industrial Electronics, 2013,60(10):4169-4177.
[17]	韩京清 . 自抗扰控制技术[J]. 前沿科学, 2007,1(1):24-31.
	HAN Jingqing . Auto disturbances rejection control technique[J]. Frontier Science, 2007,1(1):24-31.
[18]	GAO Z Q . Scaling and bandwidth-parameterization based controller tuning [C]//Proceedings of the 2003 American Control Conference. IEEE, 2003: 4989-4996.
[19]	CHANG X Y, LI Y L, ZHANG W Y , et al. Active disturbance rejection control for a flywheel energy storage system[J]. IEEE Transactions on Industrial Electronics, 2015,62(2):991-1001.
[20]	杨林, 曾江, 黄仲龙 . 线性自抗扰技术在LCL逆变器并网电流控制及有源阻尼中的应用[J]. 电网技术, 2019,43(4):1378-1386.
	YANG Lin, ZENG Jiang, HUANG Zhonglong . Application of linear active disturbance rejection technique in grid-connected current control and active damping of LCL type inverter[J]. Power System Technology, 2019,43(4):1378-1386.
[21]	曹永锋, 武玉衡, 叶永强 , 等. 基于微分前馈自抗扰的逆变器控制策略[J]. 电力系统自动化, 2019,43(5):136-142.
	CAO Yongfeng, WU Yuheng, YE Yongqiang , et al. Active disturbance rejection control strategy with differential feedforward for inverters[J]. Automation of Electric Power Systems, 2019,43(5):136-142.
[22]	麦倩屏, 陈鸣 . 基于自抗扰控制技术的光储微电网无功支撑策略[J]. 电网技术, 2019,43(6):2132-2138.
	MAI Qianping, CHEN Ming . Reactive power support strategy of photovoltaic/battery microgrid based on ADRC[J]. Power System Technology, 2019,43(6):2132-2138.
[23]	杨林, 曾江, 马文杰 , 等. 基于改进二阶线性自抗扰技术的微网逆变器电压控制[J]. 电力系统自动化, 2019,43(4):146-153.
	YANG Lin, ZENG Jiang, MA Wenjie , et al. Voltage control of microgrid inverter based on improved second-order linear active disturbance rejection control[J]. Automation of Electric Power Systems, 2019,43(4):146-153.
[24]	TAN W, FU C F . Linear active disturbance-rejection control: Analysis and tuning via IMC[J]. IEEE Transactions on Industrial Electronics, 2016,63(4):2350-2359.
[25]	JIN H, SONG J, LAN W . et al. On the characteristics of ADRC: A PID interpretation[J/OL]. Science China Information Sciences, 2020, 63:209201[2020-04-14]. https://doi.org/10.1007/s11432-018-9647-6.