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Journal of ZheJiang University (Engineering Science)  2023, Vol. 57 Issue (5): 1050-1060    DOI: 10.3785/j.issn.1008-973X.2023.05.021
Energy storage sliding mode controller for controlling acceleration power of synchronous generator
Ying ZHAO1,2(),Da WANG1,Jia-hua NI3,Yong-hui LING3,Ji XIANG3,*(),Ting-ting ZHENG1
1. State Grid East Inner Mongolia Electric Power Co. Ltd, Electric Power Research Institute, Hohhot 010010, China
2. Polytechnic Institute, Zhejiang University, Hangzhou 310027, China
3. College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
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Aiming at the problem of power angle stability in power systems, an energy storage sliding mode controller was proposed to control the acceleration power of synchronous generator based on the detailed modeling and analysis of the interaction between energy storage and synchronous generator energy. Using the strong robustness of sliding mode control, the speed deviation of the synchronous generator was introduced into the sliding mode surface. The acceleration power of the synchronous generator was controlled to decouple the synchronous generator from the power grid in control. The frequency of the synchronous generator was restored to the rated value. Thus the power angle stability of the system could be enhanced. A nonlinear smooth function was used to replace the sign function in the sliding mode control, then a practical sliding mode controller was obtained to weaken the chattering phenomenon in the sliding mode control. The stability of the proposed controller was analyzed by constructing the Lyapunov function. In the Matlab/Simulink, the performance of the system under disturbance was compared among the parameter feedback linearization controller (PFL), the power oscillation damping controller (POD), the flexible controller (FC) and the proposed method. The results show that the proposed controller has a stability time shortened by more than 30% compared to the aforementioned three methods.

Key wordssynchronous generator      power angle stability      energy storage      sliding mode control      acceleration power     
Received: 19 December 2021      Published: 09 May 2023
CLC:  TM 712  
Fund:  国网内蒙古东部电力公司科技项目(526604210005);国家自然科学基金资助项目(62173295)
Corresponding Authors: Ji XIANG     E-mail:;
Cite this article:

Ying ZHAO,Da WANG,Jia-hua NI,Yong-hui LING,Ji XIANG,Ting-ting ZHENG. Energy storage sliding mode controller for controlling acceleration power of synchronous generator. Journal of ZheJiang University (Engineering Science), 2023, 57(5): 1050-1060.

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针对电力系统功角稳定性问题,在建模分析储能与同步发电机能量交互关系的基础上,提出一种控制同步发电机加速功率的储能滑模控制器. 利用滑模控制的强鲁棒性,将同步发电机的转速偏差引入滑模面,并通过控制同步发电机的加速功率,使同步发电机与电网在控制上解耦,并使同步发电机的频率恢复至额定值,从而增强系统的功角稳定性. 为了削弱滑模控制中的抖振现象,采用非线性光滑函数代替滑模控制中的符号函数,得到实用化的滑模控制器. 通过构造李雅普诺夫函数进行所提控制器的稳定性分析. 在Matlab/Simulink的仿真测试中,对比所提控制器和参数反馈线性化控制器(PFL)、功率振荡阻尼控制器(POD)以及柔性控制器(FC)在扰动下的系统性能,结果表明所提控制器稳定时间比其他3种控制方法缩短30%以上.

关键词: 同步发电机,  功角稳定,  储能,  滑模控制,  加速功率 
Fig.1 Energy storage structure and equivalent circuit under local PQ axis
Fig.2 Equivalent circuit of multi machine power system with energy storage under synchronous rotating coordinate axis
Fig.3 Practical sliding mode controller for energy storage
Fig.4 System structure diagram of four generators and two areas
Fig.5 Simulation results when ${G_1}$voltage reference is increased by 5%
Fig.6 Simulation results when bus 7 occurs fault
控制器 超调量/ (°) 控制器 超调量/ (°)
未安装储能 2.37 FC 2.33
PFL 2.62 所提控制器 2.02
POD 2.25
Tab.1 Overshoot comparison of three-phase short circuit fault
Fig.7 System diagram of 14 generators and 59 buses
储能序号 ${{S_i^{{\rm{ESS}}}}}/{{{P_{{\rm{m}},i}}}}$ ${{S_i^{{\rm{ESS}}}}}/{{P_{\rm{m}}^{{\rm{total}}}}}$ ${{S_i^{{\rm{ESS}}}}}/{{{S^{{\rm{SG,total}}}}}}$
G1端口储能 35.625 2 0.577 5 0.456 2
G2端口储能 11.111 6 1.732 6 1.368 9
G6端口储能 11.111 6 2.021 4 1.597 0
G7端口储能 14.184 4 0.577 5 0.456 2
G8端口储能 12.697 1 0.770 0 0.608 3
G12端口储能 11.110 0 0.288 7 0.228 1
Tab.2 Ratio of different energy storage capacity %
案例 描述
1 t=10 s时,G1端电压参考值增加5%
2 t=10 s时,母线-205发生0.1 s三相短路故障
3 t=10 s时,母线-309发生0.1 s三相短路故障
4 t=10 s时,母线-509发生0.1 s三相短路故障
Tab.3 Test case description of 14 generators and 59 buses
Fig.8 Voltage regulation simulation results of case study 1
Fig.9 Short circuit fault simulation results of case study 2 to 4
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