Research of the Electric Spring about Dual-Loop Decoupling Control and Effective Operation Range
Jia Hefei1, He Yingjie1,2, Cai Yuxi1, Zhang Zheng3, Liu Jinjun1
1. School of Electrical Engineering Xi'an Jiaotong University Xi’an 710049 China; 2. Department of Energy Aalborg University Aalborg DK-9200 Denmark; 3. School of Mechanical Engineering Xi′an Jiaotong University Xi′an 710049 China;
Abstract：Electric Spring, a converter applied in load side, forms the smart load with the noncritical load to regualte load power consumption and stabilize the critical load voltage. It is mainly embeded in the distributed power systems with large amounts of renewable energy sources, and can effectively deal with the issues resulting from the intermittency and instability of renewable energy source. In this paper, the application background and the basic operation principle were introduced firstly. Moreover the theoretical analysis of the reason why the electric spring can adjust the voltage was carried out. Then the shortcomings of the existing control method were introduced. A control method based on the synchronous rotating coordinate system was proposed, which can make the DC-side voltage of ES and the critical voltage stabilize at the reference value and has the decoupling effects. Finally according to the circuit model of single-phase ES in the system, the equation about the relationship between the critical load voltage and other circuit parameters was derived. The influence of noncritical load and supply voltage on the effective operation range of the ES was analyzed through the Matlab. And the experimental platform was also set up to verify the proposed control method under the capacitive mode and the inductive mode respectively, which proved the correctness and effectiveness of the control method.
贾何飞, 何英杰, 蔡雨希, 张政, 刘进军. 电气弹簧双环解耦控制及有效运行范围研究[J]. 电工技术学报, 2020, 35(15): 3314-3326.
Jia Hefei, He Yingjie, Cai Yuxi, Zhang Zheng, Liu Jinjun. Research of the Electric Spring about Dual-Loop Decoupling Control and Effective Operation Range. Transactions of China Electrotechnical Society, 2020, 35(15): 3314-3326.
[1] China Eyes 20% Renewable Energy By 2020[N]. China Daily News, Taiwan, Chinahina Eyes 20% Renewable Energy By 2020[N]. China Daily News, Taiwan, China, Jun.2009. [2] 刘华志, 李永刚, 王优胤, 等. 无功电压优化对新能源消纳的影响[J]. 电工技术学报, 2019, 34(增刊2): 646-653. Liu Zhihua, Li Yonggang, Wang Youyin, et al.Influence about reactive power voltage optimization on the dissipation of new energy[J]. Transactions of China Electrotechnical Society, 2019, 34(S2): 646-653. [3] Gyugyi L, Schauder C D, Sen K K.Static synchronous series compensator: a solid-state approach to the series compensation of transmission lines[J]. IEEE Transactions on Power Delivery, 1997, 12(1): 406-417. [4] Zhang L, Crow M L, Yang Z, et al.The steady state characteristics of an SSSC integrated with energy storage[C]// 2001 IEEE Power Engineering Society Winter Meeting, Columbus, 2001:1311-1316. [5] Faridi M, Maeiiat H, Karimi M, et al.Power system stability enhancement using static synchronous series compensation(SSSC)[C]// 3rd International Conference on Computer Research and Development, Shanghai, 2011, 3: 387-391. [6] 易成星, 周前, 杨伟. 统一潮流控制器在风电机组并网运行中的应用[J]. 电力系统保护与控制, 2014, 42(20): 46-51. Yi Chengxing, Zhou Qian, Yang Wei.Application of unified power flow controller in wind turbine grid operation[J]. Power System Protection and Control, 2014, 42(20): 46-51. [7] 祁欢欢, 陆振纲, 陈静, 等. 基于模块化多电平的统一潮流控制器换流器和直流侧故障特征分析及保护配置[J]. 电力系统保护与控制, 2018, 46(20): 59-68. Qi Huanhuan, Lu Zhengang, Chen Jing, et al.Fault characteristic analysis and protection configuration of UPFC converter and DC side based on modular multilevel[J]. Power System Protection and Control, 2018, 46(20): 59-68. [8] Lee S, Kim H, Sul S, et al.A novel control algorithm for static series compensators by use of PQR instantaneous power theory[J]. IEEE Transactions on Power Electronics, 2004, 19(3): 814-827. [9] Moursi M, Sharaf A.Novel controllers for the 48-pulse VSC STATCOM and SSSC for voltage regulation and reactive power compensation[J]. IEEE Transactions on Power Systems, 2005, 20(4): 1985-1997. [10] 任必兴, 杜文娟, 王海风. 静止同步补偿器与直驱永磁风机的次同步控制交互研究[J]. 电工技术学报, 2018, 33(24): 250-262. Ren Bixing, Du Wenjuan, Wang Haifeng.Analysis on sub-synchronous control interaction between static synchronous compensator and permanent magnet synchronous generator[J]. Transactions of China Electrotechnical Society, 2018, 33(24): 250-262. [11] 张学广, 刘义成, 海樱, 等. 改进的配电网双馈风电场电压控制策略[J]. 中国电机工程学报, 2010, 30(7): 29-35. Zhang Xueguang, Liu Yicheng, Hai Ying, et al.Coordinative strategy for automatic voltage control of wind farms with doubly fed induction generators[J]. Proceedings of the CSEE, 2010, 30(7): 29-35. [12] 荣飞, 李培瑶, 周诗嘉. 双馈风电场损耗最小化的有功无功协调优化控制[J]. 电工技术学报, 2020, 35(3): 520-529. Rong Fei, Li Peiyao, Zhou Shijia.Coordinated optimal control with loss minimization for active and reactive power of doubly fed induction generator-based wind farm[J]. Transactions of China Electrotechnical, 2020, 35(3): 520-529. [13] 张继红, 王洪明, 魏毅立, 等. 含复合储能和燃气轮发电机的直流微电网母线电压波动分层控制策略[J]. 电工技术学报, 2018, 33(6): 1238-1246. Zhang Jihong, Wang Hongming, Wei Yili, et al.Hierarchical control strategy of voltage fluctuation in DC microgrid consisting gas-turbine generator and composite energy storage[J]. Transactions of China Electrotechnical Society, 2018, 33(6): 1238-1246. [14] Le H, Santoso S, Grady W M.Development and analysis of an ESS-based application for regulating wind farm power output variation[C]// IEEE Power & Energy Society General Meeting, Calgary, 2009: 1-8. [15] Hui S Y R, Lee C K, Wu F F. Electric springs—a new smart grid technology[J]. IEEE Transactions on Smart Grid, 2012, 3(3): 1552-1561. [16] Chi K L, Chaudhuri B, Shu Y H.Hardware and control implementation of electric springs for stabilizing future smart grid with intermittent renewable energy sources[J]. IEEE Journal of Emerging & Selected Topics in Power Electronics, 2013, 1(1): 18-27. [17] Lee C K, Cheng K L, Ng W M.Load characterization of electric spring[C]// IEEE Energy Conversion Congress and Exposition, Denver, 2013: 4665-4670. [18] 曾正, 邵伟华, 冉立, 等. 基于直流电气弹簧的直流配电网电压波动抑制[J]. 电工技术学报, 2016, 31(17): 23-31. Zeng Zheng, Shao Weihua, Ran Li, et al.Voltage fluctuation suppression of DC distribution network based on DC electric spring[J]. Transactions of China Electrotechnical Society, 2016, 31(17): 23-31. [19] Wang Qingsong, Cheng Ming, Chen Zhe, et al.Steady-state analysis of electric springs with a novel δ control[J]. IEEE Transactions on Power Electronics, 2015, 30(12): 7159-7169. [20] Mok K T, Tan S C, Hui S Y R. Decoupled power angle and voltage control of electric spring[J]. IEEE Transactions on Power Electronics, 2016, 31(2): 1216-1229. [21] 张崇巍, 张兴. PWM整流器及其控制[M]. 北京: 机械工业出版社, 2003.
2020, Vol. 35 
