PDF(646 KB)
Precise Voltage Margin Control for Modular Multilevel Converter based Multi-terminal HVDC System
HU Jing,ZHAO Chengyong,ZHAI Xiaomeng
Electric Power Construction ›› 2013, Vol. 34 ›› Issue (4) : 1-7.
PDF(646 KB)
PDF(646 KB)
Precise Voltage Margin Control for Modular Multilevel Converter based Multi-terminal HVDC System
When multi-terminal HVDC system is used for long distance power transmission, DC line voltage drop and DC line power loss make significant impacts on the precision of voltage margin control, which makes the control of DC voltage unstable. Therefore, a precise voltage margin control method is proposed. In this paper a mathematical model in dq coordinate for VSC based multi-terminal DC power transmission system (VSC-MTDC). Then the value of voltage margin is calculated and revised in controller, with adequate consideration of the influence of line voltage drop and power loss on control reference value, based on power flow calculation for DC system. A simulation model of modular multilevel converter (MMC) based MTDC system in PSCAD/EMTDC is established to verify the correctness and validity of the proposed control method. The results show that with this method control characteristic deviations caused by unsuitable setting of voltage margin value could be avoided, and the control mode could be quickly switched under large power disturbance to improve the system stability.
high voltage direct current transmission (HVDC) / VSC based multi-terminal DC transmission system (VSC-MTDC) / modular multilevel converter (MMC) / voltage margin control / precise control
[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,2009:2-13.
[2]赵成勇,李金丰,李广凯.基于有功和无功独立调节的VSC-HVDC控制策略[J].电力系统自动化,2005,29(9):20-24.
[3]张文亮,汤涌,曾南超.多端高压直流输电技术及应用前景[J].电网技术,2010,34(09):1-6.
[4]Kundur P.Power system stability and control[M].New York:McGraw Hill,1994:538-544.
[5]赵畹君.高压直流输电工程技术[M].北京:中国电力出版社,2004:459-464.
[6]Lesnicar A,Marquardt R.An innovative modular multilevel converter topology suitable for a wide power range[C]//2003 IEEE Bologna Power Tech Conference,Bologna,Italy:IEEE/ PES,2003:1-6.
[7]Lesnicar A,Marquardt R.A new modular voltage source inverter topology[C]//10th European Conference on Power Electronics and Applications,Toulouse,France:European Power Electronics and Drives,2003:1-5.
[8]Dorn J,Huang H,Retzmann D.A new multilevel voltage-sourced converter topology for HVDC applications[C]// CIGRE session 42,Paris,France:CIGRE,2008:19-21.
[9]Ding G J,Tang G F,He Z Y,et al.New technologies of voltage source converter(VSC) for HVDC transmission system based on VSC[C]//2008 IEEE Power and Energy Society General Meeting,Pittsburgh,USA:IEEE/ PES,2008:1-8.
[10]Adam G P,Anaya-Lara O,Burt G.Multi-terminal DC transmission system based on modular multilevel converter[C]//2009 Proceedings of the 44th International Universities Power Engineering Conference (UPEC),Glasgow,United Kingdom:IEEE,2009:1-5.
[11]Jiang H B,Ekstrom A.Muliterminal HVDC in urban area of large cities[J].IEEE Trans on Power Delivery,1998,13(4):1278-1284.
[12]Sakamoto K,Yaijima M.Development of a control system for a high performance self-commutated AC/DC converter[J].IEEE Trans on Power Delivery,1998,13(1):225-232.
[13]Xu L,Williams B W,Yao L Z.Muti-terminal DC transmission system for connecting large offshore wind farm[C]//2008 IEEE Power and Energy Society General Meeting,Pittsburgh,USA:IEEE,2008:1-7.
[14]Prieto-Araujo E,Bianchi F D,Junyent-Ferre A,et al.Methodology for droop control dynamic analysis of multi-terminal VSC-HVDC grids for offshore[J].IEEE Trans on Wind Farms Power Delivery,2011,26(4):2476-2485.
[15]陈谦,唐国庆,潘诗锋.采用多点直流电压控制方式的VSC多端直流输电系统[J].电力自动化设备,2004,24(5):10-14.
[16]Seki N.Filed testing of 53 MVA three-terminal DC link between power system using GTO converters[C]//IEEE Power Engineering Society Winter Meeting,Las Vegas, USA:IEEE,2000:2504-2508.
[17]Nakajima T,Irokawa S.A control system for HVDC transmission by voltage sourced converters[C]//IEEE Power Engineering Society Summer Meeting,Edmonton,Canada:IEEE,1999:1113-1119.[18]陈海荣,徐政.适用于VSC-MTDC系统的直流电压控制策略[J].电力系统自动化,2006,30(19):28-33.
[19]Haileselassie T M,Molinas M,Undeland T.Multi-terminal VSC-HVDC system for integration of offshore wind farms and green electrification of platforms in the North Sea[C]//Nordic Workshop on Power and Industrial Electronics,Espoo,Finland,2008:1-8.
[20]屠卿瑞,徐政,郑翔.模块化多电平换流器型直流输电内部环流机理分析[J].高电压技术,2010,36(2):547-552.
[21]王姗姗,周孝信,汤广福.模块化多电平电压源换流器的数学模型[J].中国电机工程学报,2011,31(24):1-8.
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