接入新能源大基地汇集系统的柔直换流站低电压穿越方法研究

doi:10.19595/j.cnki.1000-6753.tces.240025

Abstract
Figure/Table
References (0)
Related Citation (15)

Download: PDF (1151 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract

When the collection line of the flexible direct current (DC) transmission system of a new energy mega-base experiences a fault, the flexible DC converter station may, due to overcurrent blocking, result in the disconnection of the entire connection to the new energy source. To address these issues, this paper, considering the control characteristics of the new energy grid-connected converter, analyzes the necessity of retaining the voltage outer loop during the low penetration control period of the flexible converter station. Subsequently, a method for low-voltage ride-through of the collection system is proposed based on sequence current limitation and equivalent impedance. This involves separating the reference currents output by the outer loop into positive and negative sequences, then transforming them into the three-phase coordinate system to achieve independent processing of the output currents for each phase, thus solving the problem of asymmetrical fault transient overcurrent of the faulted phase. Simultaneously, the paper utilizes the equivalent impedance method to adaptively adjust the reference values of the outer loop voltage, avoiding the drawback of the outer loop control exiting due to saturation after the inner loop current limiting section becomes effective. This helps prevent overcurrent blocking of the flexible DC converter station during the fault steady-state period. The authors constructed a refined model of the AC collection system for the new energy mega-base connected to the flexible converter station in PSCAD and validated the effectiveness of the proposed control method through simulation experiments.

Key words： Renewable energy base collection system low voltage ride trough equivalent impedance method inner ring current limiting

Received: 04 January 2024

PACS:

TM615

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	Liu Haolin
	Jia Ke
	Bi Tianshu
	Niu Houmin
	Li Weitao

Cite this article:

Liu Haolin,Jia Ke,Bi Tianshu等. Research on Low Voltage Ridethrough Methods for Flexible DC Converter Stations Connected to the Gathering System of New Energy Base[J]. Transactions of China Electrotechnical Society, 0, (): 240025-240025.

URL:

https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.240025 OR https://dgjsxb.ces-transaction.com/EN/Y0/V/I/240025

[1] 马富艺龙, 辛焕海, 刘晨曦, 等. 新能源基地柔性直流送出系统小扰动电压支撑强度评估[J]. 电工技术学报, 2023, 38(21): 5758-5770, 5938.
Ma Fuyilong, Xin Huanhai, Liu Chenxi, et al.Small-disturbance system voltage support strength assessment method for renewables VSC-HVDC delivery system[J]. Transactions of China Electrotechnical Society, 2023, 38(21): 5758-5770, 5938.
[2] Fu Yimu, Liu Zhiqing, Zhao Long, et al.Offshore wind power development and transmission technology research in Shandong[C]//2022 IEEE/IAS Industrial and Commercial Power System Asia (I&CPS Asia), Shanghai, China, 2022: 195-199.
[3] 王毅, 付媛, 苏小晴, 等. 基于VSC-HVDC联网的风电场故障穿越控制策略研究[J]. 电工技术学报, 2013, 28(12): 150-159.
Wang Yi, Fu Yuan, Su Xiaoqing, et al.Fault ride-through control strategy of wind farm integrated with VSC-HVDC[J]. Transactions of China Electrotechnical Society, 2013, 28(12): 150-159.
[4] 聂鹏程, 吴文辉. 电网电压对称跌落时无刷双馈风力发电机的状态反馈控制[J]. 电工技术学报, 2023, 38(17): 4610-4620.
Nie Pengcheng, Wu Wenhui.State feedback control of brushless doubly-fed wind power generator under symmetrical grid voltage drop[J]. Transactions of China Electrotechnical Society, 2023, 38(17): 4610-4620.
[5] Hu Xiaobo, Liang Jun, Rogers D J, et al.Power flow and power reduction control using variable frequency of offshore AC grids[J]. IEEE Transactions on Power Systems, 2013, 28(4): 3897-3905.
[6] Lu Guanliang, Lin C H, Wu Yuankang.Comparison of communication-based and coordination-based frequency control schemes for HVDC-connected offshore wind farms[J]. IEEE Transactions on Industry Applications, 2021, 57(4): 3352-3365.
[7] 武文强, 贾科, 陈金锋, 等. 基于谐波注入信息传递的海上风电柔直并网故障穿越方法[J]. 电力系统自动化, 2021, 45(21): 112-119.
Wu Wenqiang, Jia Ke, Chen Jinfeng, et al.Fault ride-through method based on information transmission by harmonic injection for flexible DC integration of offshore wind power[J]. Automation of Electric Power Systems, 2021, 45(21): 112-119.
[8] Li Jing, Li Yong, Wang Weiyu, et al.Fault-ride through control strategy of multi-terminal high voltage DC systems[J]. IFAC-PapersOnLine, 2018, 51(28): 540-545.
[9] 朱蒙, 李卫星, 晁璞璞, 等. 提升风电场MMC-HVDC系统LVRT能力的协调控制策略[J]. 电力系统自动化, 2018, 42(19): 77-82.
Zhu Meng, Li Weixing, Chao Pupu, et al.Coordinated control strategy to enhance LVRT capability of MMC-HVDC systems connected wind farms[J]. Automation of Electric Power Systems, 2018, 42(19): 77-82.
[10] 贾科, 董学正, 王浩远, 等.接入换流站的新能源交流汇集系统低电压穿越方法[J/OL]. 电网技术, 2024: 1-10[2024-02-06]. https://doi.org/10.13335/j.1000-3673.pst.2023.0819.
Jia Ke, Dong Xuezheng, Wang Haoyuan, et al.Low voltage ride through method for new energy AC collection systems connected to converter stations [J/OL]. Power System Technology, 2024: 1-10 [2024-02-06] https://doi.org/10.13335/j.1000-3673.pst.2023.0819.
[11] Zarei S F, Mokhtari H, Ghasemi M A, et al.Reinforcing fault ride through capability of grid forming voltage source converters using an enhanced voltage control scheme[J]. IEEE Transactions on Power Delivery, 2019, 34(5): 1827-1842.
[12] Li Zilin, Hu Jiefeng, Chan K W.A new current limiting and overload protection scheme for distributed inverters in microgrids under grid faults[J]. IEEE Transactions on Industry Applications, 2021, 57(6): 6362-6374.
[13] Lu Xiaonan, Wang Jianhui, Guerrero J M, et al.Virtual-impedance-based fault current limiters for inverter dominated AC microgrids[J]. IEEE Transactions on Smart Grid, 2018, 9(3): 1599-1612.
[14] 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.
[15] Rokrok E, Qoria T, Bruyere A, et al.Transient stability assessment and enhancement of grid-forming converters embedding current reference saturation as current limiting strategy[J]. IEEE Transactions on Power Systems, 2022, 37(2): 1519-1531.
[16] Bottrell N, Green T C.Comparison of current-limiting strategies during fault ride-through of inverters to prevent latch-up and wind-up[J]. IEEE Transactions on Power Electronics, 2014, 29(7): 3786-3797.
[17] Wei Baoze, Marzàbal A, Perez J, et al.Overload and short-circuit protection strategy for voltage source inverter-based UPS[J]. IEEE Transactions on Power Electronics, 2019, 34(11): 11371-11382.
[18] Li Tao, Li Yongli, Chen Xiaolong, et al.Research on AC microgrid with current-limiting ability using power-state equation and improved Lyapunov-function method[J]. IEEE Journal of Emerging and Selected Topics in Power Electronics, 2021, 9(6): 7306-7319.
[19] 温春雪, 李正熙. 基于虚拟电阻控制环的并联逆变器简化控制方法[J]. 电工技术学报, 2012, 27(6): 63-68.
Wen Chunxue, Li Zhengxi.A simplified control method of parallel inverters based on virtual impedance control loop[J]. Transactions of China Electrotechnical Society, 2012, 27(6): 63-68.
[20] Ramos-Paz S, Ornelas-Tellez F, Rico-Melgoza J J. Robust nonlinear optimal control for voltage-frequency and active-reactive power regulation in microgrids[C]//2019 North American Power Symposium (NAPS), Wichita, KS, USA, 2019: 1-6.
[21] Sadeghkhani I, Hamedani Golshan M E, Guerrero J M, et al. A current limiting strategy to improve fault ride-through of inverter interfaced autonomous microgrids[J]. IEEE Transactions on Smart Grid, 2017, 8(5): 2138-2148.
[22] Mahamedi B, Eskandari M, Fletcher J E, et al.Sequence-based control strategy with current limiting for the fault ride-through of inverter-interfaced distributed generators[J]. IEEE Transactions on Sustainable Energy, 2020, 11(1): 165-174.
[23] Freytes J, Li Jiaqi, de Préville G, et al. Grid-forming control with current limitation for MMC under unbalanced fault ride-through[J]. IEEE Transactions on Power Delivery, 2021, 36(3): 1914-1916.
[24] 汪娟娟, 郑睿娜, 傅闯, 等. 基于逆变站动态无功控制的后续换相失败抑制方法[J]. 电工技术学报, 2023, 38(17): 4672-4682.
Wang Juanjuan, Zheng Ruina, Fu Chuang, et al.A method based on constant reactive power control of inverter to suppress the subsequent commutation failure in HVDC system[J]. Transactions of China Electrotechnical Society, 2023, 38(17): 4672-4682.
[25] 朱吉然, 牟龙华, 郭文明. 考虑并网运行微电网故障方向识别的逆变型分布式电源故障控制[J]. 电工技术学报, 2022, 37(3): 634-644.
Zhu Jiran, Mu Longhua, Guo Wenming.Fault control of inverter interfaced distributed generator considering fault direction identification of the grid-connected microgrid[J]. Transactions of China Electrotechnical Society, 2022, 37(3): 634-644.
[26] 胡小康, 王中权, 綦晓, 等. 考虑最低惯量需求的海上风电与海岛微网频率交互控制策略[J]. 南方电网技术, 2023, 17(5): 80-90.
Hu Xiaokang, Wang Zhongquan, Qi Xiao, et al.Frequency interaction control strategy between offshore wind power and island microgrid considering minimum inertia demand[J]. Southern Power System Technology, 2023,17(5): 80-90.
[27] Li Zilin, Hu Jiefeng, Chan K W.A new current limiting and overload protection scheme for distributed inverters in microgrids under grid faults[J]. IEEE Transactions on Industry Applications, 2021, 57(6): 6362-6374.
[28] Qoria T, Gruson F, Colas F, et al.Critical clearing time determination and enhancement of grid-forming converters embedding virtual impedance as current limitation algorithm[J]. IEEE Journal of Emerging and Selected Topics in Power Electronics, 2020, 8(2): 1050-1061.