Real-Time Modeling and Simulation of Flexible DC Grid with Various Types of Current Limiting Devices Based on RT-LAB

doi:10.11930/j.issn.1004-9649.202105056

Abstract

Abstract: Flexible DC grids have the characteristics of "low inertia and weak damping", and their fault current rises rapidly with high peak value. Current limiting devices usually contain a huge number of power electronic devices, which not only increases the complexity of the system, but also reduces the simulation efficiency of the DC grids. An equivalent modeling method is proposed for different current limiting devices, so as to improve the simulation efficiency of the model and meet the requirements of system design and operation analysis. Firstly, a digital simulation model of a 17-terminal flexible DC grid with various current limiting devices is built in this paper. Then, according to the generalized equivalent modeling method for single-port sub-module, an effective equivalent modeling strategy is proposed for four typical fault current limiting devices respectively. Finally, the digital model of 17-terminal DC grid is processed in real-time based on RT-LAB platform to complete the construction of the real-time model. The simulation results show that the proposed equivalent method and the real-time simulation model can accurately fit various working conditions such as steady-state and fault.

Key words: flexible DC transmission, DC grid, current limiting device, equivalent model, RT-LAB, real-time simulation

XIA Shiwei, GAO Chenxiang, SUN Yuhao, FENG Moke, ZHAO Chengyong, XU Jianzhong, CHENG Tingting, GU Huaiguang. Real-Time Modeling and Simulation of Flexible DC Grid with Various Types of Current Limiting Devices Based on RT-LAB[J]. Electric Power, 2021, 54(10): 28-37.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202105056

https://www.electricpower.com.cn/EN/Y2021/V54/I10/28

References

[1] 汤广福. 基于电压源换流器的高压直流输电技术[M]. 北京: 中国电力出版社, 2010.
[2] 徐政. 柔性直流输电系统[M]. 北京: 机械工业出版社, 2017.
[3] 朱金涛, 辛业春. 柔性高压直流输电仿真技术研究方法综述[J]. 智慧电力, 2021, 49(3): 1–11, 94
ZHU Jintao, XIN Yechun. Review of research on simulation methods of VSC-HVDC transmission system[J]. Smart Power, 2021, 49(3): 1–11, 94
[4] 田培涛, 吴庆范, 黄金海, 等. 基于LCC和FHMMC的混合多端直流系统线路保护方案研究[J]. 电力系统保护与控制, 2021, 49(1): 170–177
TIAN Peitao, WU Qingfan, HUANG Jinhai, et al. Research on protection strategy of a hybrid multi-terminal DC system based on LCC and FHMMC[J]. Power System Protection and Control, 2021, 49(1): 170–177
[5] 许建中, 李承昱, 熊岩, 等. 模块化多电平换流器高效建模方法研究综述[J]. 中国电机工程学报, 2015, 35(13): 3381–3392
XU Jianzhong, LI Chengyu, XIONG Yan, et al. A review of efficient modeling methods for modular multilevel converters[J]. Proceedings of the CSEE, 2015, 35(13): 3381–3392
[6] 陈东, 乐波, 梅念, 等. ±320kV厦门双极柔性直流输电工程系统设计[J]. 电力系统自动化, 2018, 42(14): 180–185
CHEN Dong, YUE Bo, MEI Nian, et al. System design of Xiamen bipolar VSC-HCDC transmission project[J]. Automation of Electric Power Systems, 2018, 42(14): 180–185
[7] 郭贤珊, 周杨, 梅念, 等. 张北柔直电网的构建与特性分析[J]. 电网技术, 2018, 42(11): 3698–3707
GUO Xianshan, ZHOU Yang, MEI Nian, et al. Construction and characteristic analysis of Zhangbei flexible DC grid[J]. Power System Technology, 2018, 42(11): 3698–3707
[8] 饶宏, 洪潮, 周保荣, 等. 乌东德特高压多端直流工程受端采用柔性直流对多直流集中馈入问题的改善作用研究[J]. 南方电网技术, 2017, 11(3): 1–5
RAO Hong, HONG Chao, ZHOU Baorong, et al. Study on improvement of VSC-HVDC at inverter side of Wudongde multi-terminal UHVDC for the problem of centralized multi-infeed HVDC[J]. Southern Power System Technology, 2017, 11(3): 1–5
[9] 许建中, 赵成勇. 架空线路柔性直流电网故障分析与处理[M]. 北京: 中国电力出版社, 2019: 2-4.
[10] 张承良, 武董一, 陈堃, 等. 基于预充电换相电容的直流故障限流器[J]. 中国电机工程学报, 2019, 39(增刊1): 54–62
ZHANG Chengliang, WU Dongyi, CHEN Kun, et al. DC fault current limiter based on precharge commutation capacitor[J]. Proceedings of the CSEE, 2019, 39(S1): 54–62
[11] 彭克, 陈佳佳, 徐丙垠, 等. 柔性直流配电系统稳定性及其控制关键问题[J]. 电力系统自动化, 2019, 43(23): 90–98, 115
PENG Ke, CHEN Jiajia, XU Bingyin, et al. Key issues of stability and control in flexible DC distribution system[J]. Automation of Electric Power Systems, 2019, 43(23): 90–98, 115
[12] 丁江萍, 吕煜, 赵西贝, 等. 适用于架空线柔直的嵌套式全桥型混合MMC方案[J]. 中国电机工程学报, 2019, 39(23): 6844–6851, 7098
DING Jiangping, LÜ Yu, ZHAO Xibei, et al. The embedded full-bridge type hybrid MMC suitable for overhead line VSC-HVDC transmission system[J]. Proceedings of the CSEE, 2019, 39(23): 6844–6851, 7098
[13] 韩乃峥, 贾秀芳, 赵西贝, 等. 一种新型混合式直流故障限流器拓扑[J]. 中国电机工程学报, 2019, 39(6): 1647–1658, 1861
HAN Naizheng, JIA Xiufang, ZHAO Xibei, et al. A novel hybrid DC fault current limiter topology[J]. Proceedings of the CSEE, 2019, 39(6): 1647–1658, 1861
[14] 康保林, 高亮, 屈子程. 基于MMC的直流电网故障分析和保护方案研究[J]. 电测与仪表, 2020, 57(13): 130–136
KANG Baolin, GAO Liang, QU Zicheng. Research on DC faults analysis and protection scheme of DC power grid based on MMC[J]. Electrical Measurement & Instrumentation, 2020, 57(13): 130–136
[15] 贾旭东. 基于RTDS的交直流系统实时数字仿真方法研究与实现[D].保定: 华北电力大学(河北), 2009.
JIA Xudong. Research and implementation of real-time digital simulation method of AC-DC power system based on RTDS[D].Baoding: North China Electric Power University, 2009.
[16] 黄强. 多端柔性直流电网故障限流与直流线路保护研究[D]. 济南: 山东大学, 2020.
HUANG Qiang. Research on fault current limitation and DC line protection for multi-terminal flexible DC grids[D]. Jinan: Shandong University, 2020.
[17] 赵禹辰, 徐义良, 赵成勇, 等. 单端口子模块MMC电磁暂态通用等效建模方法[J]. 中国电机工程学报, 2018, 38(16): 4658–4667, 4971
ZHAO Yuchen, XU Yiliang, ZHAO Chengyong, et al. Generalized electromagnetic transient(EMT) equivalent modeling of MMCs with arbitrary single-port sub-module structures[J]. Proceedings of the CSEE, 2018, 38(16): 4658–4667, 4971
[18] XU Jianzhong, DING Hui, FAN Shengtao, et al. Enhanced high-speed electromagnetic transient simulation of MMC-MTdc grid[J]. International Journal of Electrical Power & Energy Systems, 2016, 83: 7–14.
[19] XU Jianzhong, ZHAO Chengyong, LIU Wenjing, et al. Accelerated model of modular multilevel converters in PSCAD/EMTDC[J]. IEEE Transactions on Power Delivery, 2013, 28(1): 129–136.
[20] XU Jianzhong, GOLE A M, ZHAO Chengyong. The use of averaged-value model of modular multilevel converter in DC grid[J]. IEEE Transactions on Power Delivery, 2015, 30(2): 519–528.
[21] ZHU Y C, ZHAO Z M, SHI B C, et al. Discrete state event-driven framework with a flexible adaptive algorithm for simulation of power electronic systems[J]. IEEE Transactions on Power Electronics, 2019, 34(12): 11692–11705.
[22] 丁江萍, 高晨祥, 许建中, 等. 级联H桥型电力电子变压器的闭锁状态等效建模方法[J]. 中国电机工程学报, 2021, 41(5): 1831–1840
DING Jiangping, GAO Chenxiang, XU Jianzhong, et al. Research on equivalent modeling method of cascaded H-bridge based PET under blocking state[J]. Proceedings of the CSEE, 2021, 41(5): 1831–1840
[23] XU Jianzhong, ZHAO Chengyong. A backward Euler method based Thévenin equivalent integral model for full-bridge modular multi-level converters[J]. Electric Power Components and Systems, 2016, 44(3): 313–323.
[24] 高晨祥, 丁江萍, 许建中, 等. 输入串联输出并联型双有源桥变换器等效建模方法[J]. 中国电机工程学报, 2020, 40(15): 4955–4965
GAO Chenxiang, DING Jiangping, XU Jianzhong, et al. Equivalent modeling method of input series output parallel type dual active bridge converter[J]. Proceedings of the CSEE, 2020, 40(15): 4955–4965
[25] 丁江萍, 高晨祥, 许建中, 等. 级联H桥型电力电子变压器的电磁暂态等效建模方法[J]. 中国电机工程学报, 2020, 40(21): 7047–7056
DING Jiangping, GAO Chenxiang, XU Jianzhong, et al. Electromagnetic transient equivalent modeling method of cascaded H-bridge power electronic transformer[J]. Proceedings of the CSEE, 2020, 40(21): 7047–7056
[26] SAAD H, DUFOUR C, MAHSEREDJIAN J, et al. Real time simulation of MMCs using the state-space nodal approach[C]//International Conference on Power Systems Transients (IPST2013), July 18-20, 2013. Vancouver, Canada.