A Virtual DC Motor Control Strategy Based on P-U Drooping Characteristics
Zhi Na1, Ding Ke1, Huang Qinghui2, Li Wuhua2, Zhang Hui1
1. School of Automation and Information Engineering Xi’an University of Technology College Xi’an 710048 China;; 2. School of Electrical Engineering Zhejiang University Hangzhou 310000 China
Abstract The traditional P-U droop control in DC microgrid only has drooping characteristic and a lack of inertia, which is unable to suppress voltage fluctuation. The sudden fluctuation of the power in the network can cause voltage overshoot. In order to suppress the voltage fluctuations and improve the transient behaviors of the bus voltage, a virtual DC motor control strategy based on the P-U droop characteristics is proposed. By simulating the mechanical inertia characteristics of the DC motor to adjust the P-U droop control loop, the large inertia and high damping output characteristic of the DC motor can be realized in the DC VSC. The specific mechanism of the VDCM control is analyzed, and the effectiveness of the proposed method is verified by the comparative simulation and experiments with the traditional P-U droop control base on the micro-grid experiment platform.
Zhi Na,Ding Ke,Huang Qinghui等. A Virtual DC Motor Control Strategy Based on P-U Drooping Characteristics[J]. Transactions of China Electrotechnical Society, 2021, 36(6): 1238-1248.
[1] Ujjwol T, Dipesh S, Manisha M, et al.Virtual inertia: current trends and future directions[J]. Applied Sciences, 2017, 7(7): 654. [2] Hasan A A, Radwan A A A, Ramadan E S. Modelling and analysis of a synchronous machine-emulated active intertying converter in hybrid AC/DC micro- grids[J]. IET Generation, Transmission & Distri- bution, 2018, 12(11): 2539-2548. [3] 颜湘武, 王德胜, 贾焦心. 基于分散式微电网的虚拟同步发电机无通信预同步并网方案[J]. 电工技术学报, 2019, 34(19): 4143-4153. Yan Xiangwu, Wang Desheng, Jia Jiaoxin.Non- communication pre-synchronization scheme of VSGs based on decentralized microgrids[J]. Transactions of China Electrotechnical Society, 2019, 34(19): 4143-4153. [4] Zhu Jiebei, Booth C D, Adam G P, et al.Inertia emulation control strategy for VSC-HVDC trans- mission systems[J]. IEEE Transactions on Power Systems, 2013, 28(2): 1277-1287. [5] Hosseinipour A, Hojabri H.Virtual inertia control of PV systems for dynamic performance and damping enhancement of DC microgrids with constant power loads[J]. IET Renewable Power Generation, 2018, 12(4): 430-438. [6] Ravanji M H, Parniani M.Stability assessment of DFIG-based wind turbines equipped with modified virtual inertial controller under variable wind speed conditions[C]//43rd Annual Conference of the IEEE Industrial Electronics Society, Beijing, China, 2017: 2695-2700. [7] 伍文华, 陈燕东, 罗安, 等. 一种直流微网双向并网变换器虚拟惯性控制策略[J]. 中国电机工程学报, 2017, 37(2): 360-372. Wu Wenhua, Chen Yandong, Luo An, et al.A virtual inertia control strategy for bidirectional grid- connected converters in DC micro-grids[J]. Pro- ceedings of the CSEE, 2017, 37(2): 360-372. [8] 朱爱华, 赵涛, 徐宏健, 等. 基于虚拟同步发电机控制的T型三电平并网逆变器研究[J]. 电气技术, 2019, 20(11): 11-15. Zhu Aihua, Zhao Tao, Xu Hongjian, et al.Research on T-type three-level energy storage inverter based on virtual synchronous generator control[J]. Elec- trical Engineering, 2019, 20(11): 11-15. [9] 于明, 王毅, 李永刚. 基于预测方法的直流微网混合储能虚拟惯性控制[J]. 电网技术, 2017, 41(5): 1526-1532. Yu Ming, Wang Yi, Li Yonggang.Virtual inertia control of hybrid energy storage in DC microgrid based on predictive method[J]. Power System Tech- nology, 2017, 41(5): 1526-1532. [10] 陈文倩, 辛小南, 程志平. 基于虚拟同步发电机的光储并网发电控制技术[J]. 电工技术学报, 2018, 33(增刊2): 538-545. Chen Wenqian, Xin Xiaonan, Cheng Zhiping.Control of grid-connected of photovoltaic system with storage based on virtual synchronous generator[J]. Transa- ctions of China Electrotechnical Society, 2018, 33(S2): 538-545. [11] 周晖, 王跃, 李明烜, 等. 孤岛并联虚拟同步发电机暂态功率分配机理分析与优化控制[J]. 电工技术学报, 2019, 34(增刊2): 654-663. Zhou Hui, Wang Yue, Li Mingxuan, et al.Analysis and optimal control of transient active power sharing between islanded parallel virtual synchronous generators[J]. Transactions of China Electrotechnical Society, 2019, 34(S2): 654-663. [12] Cao Yijia, Wang Weiyu, Li Yong, et al.A virtual synchronous generator control strategy for VSC- MTDC system[J]. IEEE Transactions on Energy Con- version, 2018, 33(2): 750-761. [13] 孟建辉, 彭嘉琳, 王毅, 等. 多约束下光储系统的灵活虚拟惯性控制方法[J]. 电工技术学报, 2019, 34(14): 3046-3058. Meng Jianhui, Peng Jialin, Wang Yi, et al.Multi- constrained flexible virtual inertial control method for photovoltaic energy storage system[J]. Transa- ctions of China Electrotechnical Society, 2019, 34(14): 3046-3058. [14] 朱晓荣, 孟凡奇, 谢志云. 基于虚拟同步发电机的直流微网DC-DC变换器控制策略[J]. 电力系统自动化, 2019, 43(21): 132-144. Zhu Xiaorong, Meng Fanqi, Xie Zhiyun.Control strategy of DC-DC converter in DC microgrid based on virtual synchronous generator[J]. Automation of Electric Power Systems, 2019, 43(21): 132-144. [15] 兰征, 涂春鸣, 姜飞. 基于虚拟电机技术的直流微电网与主电网柔性互联策略[J]. 电工技术学报, 2019, 34(8): 1739-1749. Lan Zheng, Tu Chunming, Jiang Fei.Flexible inter- connection strategy between DC microgrid and main power grid based on virtual motor technology[J]. Transactions of China Electrotechnical Society, 2019, 34(8): 1739-1749. [16] 张波, 颜湘武, 黄毅斌, 等. 虚拟同步机多机并联稳定控制及其惯量匹配方法[J]. 电工技术学报, 2017, 32(10): 42-52. Zhang Bo, Yan Xiangwu, Huang Yibin, et al.Stabi- lity control and inertia matching method of multi- parallel virtual synchronous generators[J]. Transa- ctions of China Electrotechnical Society, 2017, 32(10): 42-52. [17] Zhong Qingchang, Nguyen P L, Ma Z, et al.Self- synchronized synchronverters: inverters without a dedicated synchronization unit[J]. IEEE Transactions on Power Electronics, 2014, 29(2): 617-630. [18] Huang Linbin, Xin Huanhai, Wang Zhen, et al.A virtual synchronous control for voltage-source converters utilizing dynamics of DC-link capacitor to realize self-synchronization[J]. IEEE Journal of Emerging and Selected Topics in Power Electronics, 2017, 5(4): 1565-1577. [19] 盛万兴, 刘海涛, 曾正, 等. 一种基于虚拟电机控制的能量路由器[J]. 中国电机工程学报, 2015, 35(14): 3541-3550. Sheng Wanxing, Liu Haitao, Zeng Zheng, et al.An energy router based on virtual motor control[J]. Proceedings of the CSEE, 2015, 35(14): 3541-3550. [20] Soumya S, Prakash M J, Krishna R B.Virtual DC machine: an inertia emulation and control technique for a bidirectional DC-DC converter in a DC micro- grid[J]. IET Electric Power Applications, 2018, 12(6): 874-884. [21] 崔健, 吕志鹏, 盛万兴, 等. 一种新型虚拟直流电机控制技术[J]. 中国电机工程学报, 2019, 39(10): 3029-3038. Cui Jian, Lü Zhipeng, Sheng Wanxing, et al.A new control technology based on virtual DC motor[J]. Proceedings of the CSEE, 2019, 39(10): 3029-3038. [22] 张辉, 谭树成, 肖曦, 等. 具有直流电机特性的储能接口变换器控制策略[J]. 高电压技术, 2018, 44(1): 119-125. Zhang Hui, Tan Shucheng, Xiao Xi, et al.Control strategy of energy storage converter with DC machine characteristics[J]. High Voltage Engineering, 2018, 44(1): 119-125. [23] 张辉, 张凯涛, 肖曦, 等. 模拟直流发电机特性的储能变换器控制策略[J]. 电力系统自动化, 2017, 41(20): 132-138 Zhang Hui, Zhang Kaitao, Xiao Xi, et al.Control strategy of energy storage converter for simulating DC generator characteristics[J]. Automation of Elec- tric Power Systems, 2017, 41(20): 132-138.
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