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| Voltage Coordinated Control Strategy for Modular Multi-Phase PMSG-Based Series-Parallel DC Connected Offshore Wind Farm |
| Cui Hesong1, Li Xueping1, Huang Sheng1, Huang Lingxiang2, Shen Feifan1, Huang Shoudao1, Luo Derong1, Wu Gongping3 |
1. College of Electrical and Information Engineering Hunan University Changsha 410082 China;
2. Harbin Electric Corporation Wind Power Co. Ltd Xiangtan 411101 China;
3. School of Electrical & Information Engineering Changsha University of Science & Technology Changsha 410114 China |
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Abstract With the fast development of offshore wind farms (WFs), the cost-effective collection and transmission of large-scale offshore wind power has been extensively studied. Compared to the existing AC collection system with a VSC-HVDC system, a full DC WF has a number of advantages, e.g., they potentially eliminate the large AC transformers, increase efficiency and power density, and reduce the size and weight of the cable. The multi-winding PMSG has strong fault tolerance and small stator current, which can be directly connected to the grid through the multi module converter, therefore, it has been widely used in the high power wind energy conversion system in recent years. In this paper, a novel series-parallel DC connection topology for multi-phase permanent magnet synchronous generator (PMSG)-based offshore wind farm (WF) was proposed to meet the high voltage、high power and high reliability requirements of wind farm DC transmission system power transmission.
Considering the stochastic and intermittent nature of wind energy and wake effects, the available wind power of the WTs might be different, which may result in the differences of the DC terminal voltages of the WTs. The WTs with the high wind speed condition have a risk of being tripped because their terminal voltages may exceed their threshold. Therefore, a voltage coordinated control strategy for modular multi-phase PMSG-based series-parallel DC connected offshore wind farm should be developed. Several overvoltage elimination control strategies have been proposed for the series-parallel DC connected WF. However, these control methods do not consider the network loss and voltage drop on the transmission cable. In this paper, a new overvoltage elimination control strategy considering the network loss and voltage drop on the transmission cable is developed, which can enhance the safe operation of WF and improve the overvoltage elimination capability of WTs.
The mathematical model of DC wind turbine (WT) system with the modular multi-phase PMSG was established. Based on the mathematical model, the modular multi-phase permanent magnet wind turbine deadbeat power prediction controller was designed to improve the dq axis current tracking accuracy and dynamic response speed, and compensate the one beat delay. Moreover, according to the characteristics of the modular multi-phase PMSG-based series-parallel topology, a power and voltage coordinated control strategy considering power flow of the WF DC collection system was developed to suppress the overvoltage of the WT terminal to ensure safe operation of the WF by adjusting the reference value of the active power of the wind turbine in real time.
A WF model with three clusters in parallel and each cluster consisting of 6×5 MW modular multi-winding PMSG in series is used to validate the proposed deadbeat power predictive control strategy and power and voltage coordinated control. Simulation results show that, the proposed predictive power control strategy can achieve excellent tracking performance and compensate the control delay. The overvoltage problem of the WT terminal caused by the DC series connected topology can be effectively solved by the proposed coordinated control strategy for the multi-winding PMSG-based WF. Furthermore, the network loss and voltage drop on the transmission cable has been taken into consideration to improve the overvoltage elimination performance of WTs and guarantee the safe operation of the WF.
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Received: 09 October 2021
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[1] Huang Sheng, Wu Qiuwei, Guo Yifei, et al.Dis-tributed voltage control based on ADMM for large-scale wind farm cluster connected to VSC-HVDC[J]. IEEE Transactions on Sustainable Energy, 2020, 11(2): 584-594.
[2] Bian Chunyuan, Liu Shangyue, Xing Haiyang, et al.Research on fault-tolerant operation strategy of rectifier of square wave motor in wind power system[J]. CES Transactions on Electrical Machines and Systems, 2021, 5(1): 62-69.
[3] Lee G S, Kwon D H, Moon S I.DC current and voltage droop control method of hybrid HVDC systems for an offshore wind farm connection to enhance AC voltage stability[J]. IEEE Transactions on Energy Conversion, 2021, 36(1): 468-479.
[4] 董文凯, 杜文娟, 王海风. 弱连接条件下锁相环动态主导的并网直驱风电场小干扰稳定性研究[J]. 电工技术学报, 2021, 36(3): 609-622.
Dong Wenkai, Du Wenjuan, Wang Haifeng.Small-signal stability of a grid-connected PMSG wind farm dominated by dynamics of PLLs under weak grid connection[J]. Transactions of China Electrotechnical Society, 2021, 36(3): 609-622.
[5] Dong Huanfeng, Xu Zheng, Song Pengcheng, et al.Optimized power redistribution of offshore wind farms integrated VSC-MTDC transmissions after onshore converter outage[J]. IEEE Transactions on Industrial Electronics, 2017, 64(11): 8948-8958.
[6] 陈剑, 杜文娟, 王海风. 基于对抗式迁移学习的含柔性高压直流输电的风电系统次同步振荡源定位[J]. 电工技术学报, 2021, 36(22): 4703-4715.
Chen Jian, Du Wenjuan, Wang Haifeng.Location method of subsynchronous oscillation source in wind power system with VSC-HVDC based on adversarial transfer learning[J]. Transactions of China Electro-technical Society, 2021, 36(22): 4703-4715.
[7] Torres-Olguin R E, Garces A, Molinas M, et al. Integration of offshore wind farm using a hybrid HVDC transmission composed by the PWM current-source converter and line-commutated converter[J]. IEEE Transactions on Energy Conversion, 2013, 28(1): 125-134.
[8] Max L, Lundberg S.System efficiency of a DC/DC converter-based wind farm[J]. Wind Energy, 2008, 11(1): 109-120.
[9] Zhan C, Smith C, Crane A, et al.DC transmission and distribution system for a large offshore wind farm[C]//9th IET International Conference on AC and DC Power Transmission (ACDC 2010), London, 2010: 1-5.
[10] Bahirat H J, Mork B A, Høidalen H K.Comparison of wind farm topologies for offshore applications[C]//2012 IEEE Power and Energy Society General Meeting, San Diego, CA, USA, 2012: 1-8.
[11] 姚良忠, 施刚, 曹远志, 等. 海上直流风电场内网中串联直流风机的变速控制[J]. 电网技术, 2014, 38(9): 2410-2415.
Yao Liangzhong, Shi Gang, Cao Yuanzhi, et al.Variable speed control of series-connected DC wind turbines in the internal grid of offshore DC wind farm[J]. Power System Technology, 2014, 38(9): 2410-2415.
[12] Veilleux E, Lehn P W.Interconnection of direct-drive wind turbines using a series-connected DC grid[J]. IEEE Transactions on Sustainable Energy, 2014, 5(1): 139-147.
[13] Zhang Haibo, Gruson F, Rodriguez D M F, et al. Overvoltage limitation method of an offshore wind farm with DC series-parallel collection grid[J]. IEEE Transactions on Sustainable Energy, 2019, 10(1): 204-213.
[14] 张文娟, 彭婧, 荣飞. VSC-HVDC串并联型D-PMSG风电场机组功率—电压协调控制[J]. 电机与控制学报, 2017, 21(8): 88-94.
Zhang Wenjuan, Peng Jing, Rong Fei.Coordinated control of power and voltage based on VSC-HVDC series-parallel topology D-PMSG based wind farm[J]. Electric Machines and Control, 2017, 21(8): 88-94.
[15] 黄守道, 王佳蕊, 荣飞, 等. 串并联型风电场机组的过电压协调控制[J]. 电力系统及其自动化学报, 2018, 30(6): 60-65, 72.
Huang Shoudao, Wang Jiarui, Rong Fei, et al.Coordination control of over-voltage for turbines in series-parallel wind farm[J]. Proceedings of the CSU-EPSA, 2018, 30(6): 60-65, 72.
[16] Iqbal A, Singh G K.PSO based controlled six-phase grid connected induction generator for wind energy generation[J]. CES Transactions on Electrical Machines and Systems, 2021, 5(1): 41-49.
[17] Niu Feng, Chen Xi, Huang Shaopo, et al.Model predictive current control with adaptive-adjusting timescales for PMSMs[J]. CES Transactions on Elec-trical Machines and Systems, 2021, 5(2): 108-117.
[18] Huang Wentao, Hua Wei, Fan Qigao.Performance analysis and comparison of two fault-tolerant model predictive control methods for five-phase PMSM drives[J]. CES Transactions on Electrical Machines and Systems, 2021, 5(4): 311-320.
[19] Zhang Bingyi, Sun Shaonan, Feng Guihong, et al.A switchable cascaded multi-DC-branch for permanent magnet synchronous generator in wide speed range on wind energy conversion system[C]//2017 IEEE 12th International Conference on Power Electronics and Drive Systems, Honolulu, HI, USA, 2017: 131-135.
[20] Oliveira D S, Reis M M, Silva C E A, et al. A three-phase high-frequency semicontrolled rectifier for PM WECS[J]. IEEE Transactions on Power Electronics, 2010, 25(3): 677-685.
[21] Alnasir Z, Kazerani M.An analytical literature review of stand-alone wind energy conversion systems from generator viewpoint[J]. Renewable and Sustainable Energy Reviews, 2013, 28: 597-615.
[22] Vattuone L, Kouro S, Estay G, et al.Open-end-winding PMSG for wind energy conversion system with dual Boost NPC converter[C]//2013 IEEE Inter-national Conference on Industrial Technology, Cape Town, South Africa, 2013: 1763-1768.
[23] Wang Yang, Panda D, Lipo T A, et al.Open-winding power conversion systems fed by half-controlled con-verters[J]. IEEE Transactions on Power Electronics, 2013, 28(5): 2427-2436.
[24] Wang Yu, Deng Zhiquan.A controllable power distribution strategy for open winding hybrid excitation generator system[J]. IEEE Transactions on Energy Conversion, 2017, 32(1): 122-136.
[25] Ng C H, Parker M A, Ran Li, et al.A multilevel modular converter for a large, light weight wind turbine generator[J]. IEEE Transactions on Power Electronics, 2008, 23(3): 1062-1074.
[26] Zhou Shijia, Rong Fei, Yin Zhangtao, et al.HVDC transmission technology of wind power system with multi-phase PMSG[J]. Energies, 2018, 11(12): 3294.
[27] 陈卓易, 屈稳太. 基于PID型代价函数的永磁同步电机模型预测电流控制[J]. 电工技术学报, 2021, 36(14): 2971-2978.
Chen Zhuoyi, Qu Wentai.Model predictive current control for permanent magnet synchronous motors based on PID-type cost function[J]. Transactions of China Electrotechnical Society, 2021, 36(14): 2971-2978.
[28] 姚绪梁, 黄乘齐, 王景芳, 等. 两相静止坐标系下的永磁同步电动机模型预测功率控制[J]. 电工技术学报, 2021, 36(1): 60-67.
Yao Xuliang, Huang Shengqi, Wang Jingfang, et al.Model predictive power control of permanent magnet synchronous motor in two-phase static coordinate system[J]. Transactions of China Electrotechnical Society, 2021, 36(1): 60-67.
[29] 李争, 安金峰, 肖宇, 等. 基于自适应观测器的永磁同步直线电机模型预测控制系统设计[J]. 电工技术学报, 2021, 36(6): 1190-1200.
Li Zheng, An Jinfeng, Xiao Yu, et al.Design of model predictive control system for permanent magnet synchronous linear motor based on adaptive observer[J]. Transactions of China Electrotechnical Society, 2021, 36(6): 1190-1200.
[30] Han Xun, Jiang Dong, Zou Tianjie, et al.Two-segment three-phase PMSM drive with carrier phase-shift PWM for torque ripple and vibration redu-ction[J]. IEEE Transactions on Power Electronics, 2019, 34(1): 588-599.
[31] Karthikeya B R, Schütt R J.Overview of wind park control strategies[J]. IEEE Transactions on Sustainable Energy, 2014, 5(2): 416-422. |
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2023, Vol. 38 
