The Model and Parameters Based on the Operation Mode of a 500kV Multi-terminal Flexible DC Power Grid
DOI: 10.23977/poweet.2017.11003 | Downloads: 16 | Views: 2693
LI Zhen-dong 1,2, TANG Yu-dong 1,2, ZHAO Zhe-yuan 1,2, WU Xiao-bo 1,2, FAN Cai-jie 1,2, LI Li 1, HAN Yan 1,2
1 State Grid Jibei Electricity Power Maintenance Company, Beijing, China
2 State Grid Jibei Electric Power Company, Beijing, China
Corresponding AuthorLI Zhen-dong
The operating conditions of 500kV Zhangjiakou-Beijing Demonstration Project at all operation modes were studied regarding a multi-terminal flexible DC system with DC switches and a true bipolar wiring method. Based on the actual AC-DC hybrid method, this paper concluded 34 kinds of N-1 operation modes for keeping the system stable, simulated the multi-level converter valve (MMC) bank by using RTDS small-step elements, adopted an ideal voltage balancing method for the treatment of sub-units and established a MCC system simulating structure in compliance with the site. The operation modes of the system were simulated by selecting the parameters which are consistent with the line, using such parameters as the actual configurations and parameters of key elements such as the converter transformer, filter, bridge arm reactor, converter, etc. adopted in the project, and establishing a flexible DC control system with a layered structure. According to the result of the simulation, the corresponding modes of the system were provided and references were given for the feasibility study and implementation of the project.
KEYWORDSMulti-terminal Flexible DC System, MMC, Parameter Configuration, Control System.
CITE THIS PAPER
Zhen-dong, L. , Yu-dong, T. , Zhe-yuan, Z. , Xiao-bo, W. , Cai-jie, F. , Li, L. , Yan, H. The Model and Parameters Based on the Operation Mode of a 500kV Multi-terminal Flexible DC Power Grid. International Journal of Power Engineering and Engineering Thermophysics (2017) 1: 16-24.
 Gemmell B, Dorn J, Retzmann D, et al. Prospects of multilevel VSC technologies for power transmission[C]//IEEE/PES Transmission and Distribution Conference and Exposition, Chicago, 2008: 87-93.
 Marquardt R, Lesnicar A, Hildinger J. Modulares stromrichterkonzept für netzkupplungsanwendung bei hohen spannungen [C]//ETG-Fachtagung 2002, Bad, Nauheim, Germany: ETG, 2002: 1-7.
 Kong Ming, Qiu Yufeng, He Zhiyuan. Pre-charging control strategies of modular multilevel converter for VSC-HVDC[J]. Power System Technology, 2011, 35(11): 67-73(in Chinese) .
 Marquardt R, Lesnicar A. New concept for high voltage-modular multilevel converter[C]//Proceedings of the 35 th IEEE Annual Power Electronics Specialists Conference, 2004, Aachen, Germany: IEEE, 2004: 3831-3835.
 Westerweller T, Friedrich K, Armonies U, et al. Trans bay cable: world's first HVDC system using multilevel voltage-sourced converter [C]//2010 CIGRE Session, Paris, France: CIGRE, 2010, B4-101: 1-6.
 Magg T G, Manchen M, Krige E, et al. Caprivi link HVDC interconnector: comparison between energized system testing and real-time simulator testing[C]//2012 CIGRE Session, Paris, France: CIGRE, 2012, B4-107: 1-16.
 Wen Jun, Zhang Yigong, Han Minxiao, et al. HVDC based on voltage source converter: a new generation of HVDC technique[J]. Power system Technology, 2003, 27(1): 47-51(in Chinese).
 Hu Hanghai, Li Jingru, Yang Weihong, et al. The development and prospet of HVDC flexible technology[J] . Electric Power Construction, 2011, 32(5): 62-66(in Chinese).
 Jacobson D A N, Wang P, Karawita C, et al. Planning the next nelson river HVDC development phase considering LCC vs. VSC technology[C]//2012 CIGRE Session, Paris, France: CIGRE, 2012, B4-103: 1-12.